src/editor/edit.c

src/editor/edit.c
Manual pages: mc • mcdiff • mcedit • mcview
/* */
This source file includes following definitions.
edit_load_status_update_cb
edit_load_file_fast
edit_find_filter
edit_get_filter
edit_insert_stream
check_file_access
edit_load_file
edit_load_position
edit_save_position
edit_purge_widget
edit_pop_undo_action
edit_pop_redo_action
get_prev_undo_action
edit_modification
is_in_indent
is_blank
edit_find_line
edit_move_up_paragraph
edit_move_down_paragraph
edit_begin_page
edit_end_page
edit_move_to_top
edit_move_to_bottom
edit_cursor_to_bol
edit_cursor_to_eol
my_type_of
edit_left_word_move
edit_left_word_move_cmd
edit_right_word_move
edit_right_word_move_cmd
edit_right_char_move_cmd
edit_left_char_move_cmd
edit_move_updown
edit_right_delete_word
edit_left_delete_word
edit_do_undo
edit_do_redo
edit_group_undo
edit_delete_to_line_end
edit_delete_to_line_begin
is_aligned_on_a_tab
right_of_four_spaces
left_of_four_spaces
edit_auto_indent
edit_double_newline
insert_spaces_tab
edit_tab_cmd
check_and_wrap_line
edit_get_bracket
edit_goto_matching_bracket
edit_move_block_to_right
edit_move_block_to_left
edit_print_string
edit_insert_column_from_file
edit_user_menu
edit_get_write_filter
edit_write_stream
is_break_char
edit_insert_file
edit_init
edit_clean
edit_reload_line
edit_set_codeset
edit_push_undo_action
edit_push_redo_action
edit_insert
edit_insert_ahead
edit_insert_over
edit_delete
edit_backspace
edit_cursor_move
edit_move_forward3
edit_get_cursor_offset
edit_get_col
edit_update_curs_row
edit_update_curs_col
edit_get_curs_col
edit_scroll_upward
edit_scroll_downward
edit_scroll_right
edit_scroll_left
edit_move_to_prev_col
edit_line_is_blank
edit_move_to_line
edit_move_display
edit_push_markers
edit_set_markers
eval_marks
edit_mark_cmd
edit_mark_current_word_cmd
edit_mark_current_line_cmd
edit_delete_line
edit_push_key_press
edit_find_bracket
edit_execute_key_command
edit_execute_cmd
edit_stack_init
edit_stack_free
edit_move_up
edit_move_down
edit_arg_vpath_new
edit_arg_new
edit_arg_init
edit_arg_assign
edit_arg_free
edit_get_file_name
   1 /*
   2    Editor low level data handling and cursor fundamentals.
   3 
   4    Copyright (C) 1996-2025
   5    Free Software Foundation, Inc.
   6 
   7    Written by:
   8    Paul Sheer 1996, 1997
   9    Ilia Maslakov <il.smind@gmail.com> 2009, 2010, 2011
  10    Andrew Borodin <aborodin@vmail.ru> 2012-2022
  11 
  12    This file is part of the Midnight Commander.
  13 
  14    The Midnight Commander is free software: you can redistribute it
  15    and/or modify it under the terms of the GNU General Public License as
  16    published by the Free Software Foundation, either version 3 of the License,
  17    or (at your option) any later version.
  18 
  19    The Midnight Commander is distributed in the hope that it will be useful,
  20    but WITHOUT ANY WARRANTY; without even the implied warranty of
  21    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22    GNU General Public License for more details.
  23 
  24    You should have received a copy of the GNU General Public License
  25    along with this program.  If not, see <https://www.gnu.org/licenses/>.
  26  */
  27 
  28 /** \file
  29  *  \brief Source: editor low level data handling and cursor fundamentals
  30  *  \author Paul Sheer
  31  *  \date 1996, 1997
  32  */
  33 
  34 #include <config.h>
  35 #include <stdio.h>
  36 #include <stdarg.h>
  37 #include <sys/types.h>
  38 #include <unistd.h>
  39 #include <string.h>
  40 #include <ctype.h>
  41 #include <sys/stat.h>
  42 #include <stdint.h>  // UINTMAX_MAX
  43 #include <stdlib.h>
  44 
  45 #include "lib/global.h"
  46 
  47 #include "lib/tty/color.h"
  48 #include "lib/tty/tty.h"  // attrset()
  49 #include "lib/tty/key.h"  // is_idle()
  50 #include "lib/skin.h"     // EDITOR_NORMAL_COLOR
  51 #include "lib/fileloc.h"  // EDIT_HOME_BLOCK_FILE
  52 #include "lib/vfs/vfs.h"
  53 #include "lib/strutil.h"  // utf string functions
  54 #include "lib/util.h"     // load_file_position(), save_file_position()
  55 #include "lib/timefmt.h"  // time formatting
  56 #include "lib/lock.h"
  57 #include "lib/widget.h"
  58 #include "lib/charsets.h"  // get_codepage_id
  59 
  60 #include "src/usermenu.h"  // user_menu_cmd()
  61 
  62 #include "src/keymap.h"
  63 #include "src/util.h"  // file_error_message()
  64 
  65 #include "edit-impl.h"
  66 #include "editwidget.h"
  67 #include "editsearch.h"
  68 #include "editcomplete.h"  // edit_complete_word_cmd()
  69 #include "editmacros.h"
  70 #include "etags.h"  // edit_get_match_keyword_cmd()
  71 #ifdef HAVE_ASPELL
  72 #include "spell.h"
  73 #endif
  74 
  75 /*** global variables ****************************************************************************/
  76 
  77 edit_options_t edit_options = {
  78     .word_wrap_line_length = DEFAULT_WRAP_LINE_LENGTH,
  79     .typewriter_wrap = FALSE,
  80     .auto_para_formatting = FALSE,
  81     .fill_tabs_with_spaces = FALSE,
  82     .return_does_auto_indent = TRUE,
  83     .backspace_through_tabs = FALSE,
  84     .fake_half_tabs = TRUE,
  85     .persistent_selections = TRUE,
  86     .drop_selection_on_copy = TRUE,
  87     .cursor_beyond_eol = FALSE,
  88     .cursor_after_inserted_block = FALSE,
  89     .state_full_filename = FALSE,
  90     .line_state = FALSE,
  91     .line_state_width = 0,
  92     .save_mode = EDIT_QUICK_SAVE,
  93     .confirm_save = TRUE,
  94     .save_position = TRUE,
  95     .syntax_highlighting = TRUE,
  96     .group_undo = FALSE,
  97     .backup_ext = NULL,
  98     .filesize_threshold = NULL,
  99     .stop_format_chars = NULL,
 100     .visible_tabs = TRUE,
 101     .visible_tws = TRUE,
 102     .show_right_margin = FALSE,
 103     .simple_statusbar = FALSE,
 104     .check_nl_at_eof = FALSE,
 105 };
 106 
 107 int max_undo = 32768;
 108 
 109 gboolean enable_show_tabs_tws = TRUE;
 110 
 111 unsigned int edit_stack_iterator = 0;
 112 edit_arg_t edit_history_moveto[MAX_HISTORY_MOVETO];
 113 /* magic sequence for say than block is vertical */
 114 const char VERTICAL_MAGIC[] = { '\1', '\1', '\1', '\1', '\n' };
 115 
 116 /*** file scope macro definitions ****************************************************************/
 117 
 118 #define TEMP_BUF_LEN 1024
 119 
 120 #define space_width  1
 121 
 122 /*** file scope type declarations ****************************************************************/
 123 
 124 /*** forward declarations (file scope functions) *************************************************/
 125 
 126 /*** file scope variables ************************************************************************/
 127 
 128 /* detecting an error on save is easy: just check if every byte has been written. */
 129 /* detecting an error on read, is not so easy 'cos there is not way to tell
 130    whether you read everything or not. */
 131 /* FIXME: add proper 'triple_pipe_open' to read, write and check errors. */
 132 static const struct edit_filters
 133 {
 134     const char *read, *write, *extension;
 135 } all_filters[] = {
 136     { "xz -cd %s 2>&1", "xz > %s", ".xz" },         //
 137     { "zstd -cd %s 2>&1", "zstd > %s", ".zst" },    //
 138     { "lz4 -cd %s 2>&1", "lz4 > %s", ".lz4" },      //
 139     { "lzip -cd %s 2>&1", "lzip > %s", ".lz" },     //
 140     { "lzma -cd %s 2>&1", "lzma > %s", ".lzma" },   //
 141     { "lzop -cd %s 2>&1", "lzop > %s", ".lzo" },    //
 142     { "bzip2 -cd %s 2>&1", "bzip2 > %s", ".bz2" },  //
 143     { "gzip -cd %s 2>&1", "gzip > %s", ".gz" },     //
 144     { "gzip -cd %s 2>&1", "gzip > %s", ".Z" },
 145 };
 146 
 147 static const off_t filesize_default_threshold = 64 * 1024 * 1024;  // 64 MB
 148 
 149 /* --------------------------------------------------------------------------------------------- */
 150 /*** file scope functions ************************************************************************/
 151 /* --------------------------------------------------------------------------------------------- */
 152 
 153 static int
 154 edit_load_status_update_cb (status_msg_t *sm)
     /*   */
 155 {
 156     simple_status_msg_t *ssm = SIMPLE_STATUS_MSG (sm);
 157     edit_buffer_read_file_status_msg_t *rsm = (edit_buffer_read_file_status_msg_t *) sm;
 158     Widget *wd = WIDGET (sm->dlg);
 159 
 160     if (verbose)
 161         label_set_textv (ssm->label, _ ("Loading: %3d%%"),
 162                          edit_buffer_calc_percent (rsm->buf, rsm->loaded));
 163     else
 164         label_set_text (ssm->label, _ ("Loading..."));
 165 
 166     if (rsm->first)
 167     {
 168         Widget *lw = WIDGET (ssm->label);
 169         WRect r;
 170 
 171         r = wd->rect;
 172         r.cols = MAX (r.cols, lw->rect.cols + 6);
 173         widget_set_size_rect (wd, &r);
 174         r = lw->rect;
 175         r.x = wd->rect.x + (wd->rect.cols - r.cols) / 2;
 176         widget_set_size_rect (lw, &r);
 177         rsm->first = FALSE;
 178     }
 179 
 180     return status_msg_common_update (sm);
 181 }
 182 
 183 /* --------------------------------------------------------------------------------------------- */
 184 /**
 185  * Load file OR text into buffers.  Set cursor to the beginning of file.
 186  *
 187  * @return FALSE on error.
 188  */
 189 
 190 static gboolean
 191 edit_load_file_fast (edit_buffer_t *buf, const vfs_path_t *filename_vpath)
     /*   */
 192 {
 193     int file;
 194     gboolean ret;
 195     edit_buffer_read_file_status_msg_t rsm;
 196     gboolean aborted;
 197 
 198     file = mc_open (filename_vpath, O_RDONLY | O_BINARY);
 199     if (file < 0)
 200     {
 201         file_error_message (_ ("Cannot open\n%s"), vfs_path_as_str (filename_vpath));
 202         return FALSE;
 203     }
 204 
 205     rsm.first = TRUE;
 206     rsm.buf = buf;
 207     rsm.loaded = 0;
 208 
 209     status_msg_init (STATUS_MSG (&rsm), _ ("Load file"), 1.0, simple_status_msg_init_cb,
 210                      edit_load_status_update_cb, NULL);
 211 
 212     ret = (edit_buffer_read_file (buf, file, buf->size, &rsm, &aborted) == buf->size);
 213 
 214     status_msg_deinit (STATUS_MSG (&rsm));
 215 
 216     if (!ret && !aborted)
 217         message (D_ERROR, MSG_ERROR, _ ("Error reading %s"), vfs_path_as_str (filename_vpath));
 218 
 219     mc_close (file);
 220     return ret;
 221 }
 222 
 223 /* --------------------------------------------------------------------------------------------- */
 224 /** Return index of the filter or -1 is there is no appropriate filter */
 225 
 226 static int
 227 edit_find_filter (const vfs_path_t *filename_vpath)
     /*   */
 228 {
 229     if (filename_vpath != NULL)
 230     {
 231         const char *s;
 232         size_t i;
 233 
 234         s = vfs_path_as_str (filename_vpath);
 235 
 236         for (i = 0; i < G_N_ELEMENTS (all_filters); i++)
 237             if (g_str_has_suffix (s, all_filters[i].extension))
 238                 return i;
 239     }
 240 
 241     return -1;
 242 }
 243 
 244 /* --------------------------------------------------------------------------------------------- */
 245 
 246 static char *
 247 edit_get_filter (const vfs_path_t *filename_vpath)
     /*   */
 248 {
 249     int i;
 250     char *quoted_name;
 251     char *p = NULL;
 252 
 253     i = edit_find_filter (filename_vpath);
 254     if (i < 0)
 255         return NULL;
 256 
 257     quoted_name = name_quote (vfs_path_as_str (filename_vpath), FALSE);
 258     if (quoted_name != NULL)
 259     {
 260         p = g_strdup_printf (all_filters[i].read, quoted_name);
 261         g_free (quoted_name);
 262     }
 263 
 264     return p;
 265 }
 266 
 267 /* --------------------------------------------------------------------------------------------- */
 268 
 269 static off_t
 270 edit_insert_stream (WEdit *edit, FILE *f)
     /*   */
 271 {
 272     int c;
 273     off_t i;
 274 
 275     for (i = 0; (c = fgetc (f)) >= 0; i++)
 276         edit_insert (edit, c);
 277 
 278     return i;
 279 }
 280 
 281 /* --------------------------------------------------------------------------------------------- */
 282 /**
 283  * Open file and create it if necessary.
 284  *
 285  * @param edit           editor object
 286  * @param filename_vpath file name
 287  * @param st             buffer for store stat info
 288  * @return TRUE for success, FALSE for error.
 289  */
 290 
 291 static gboolean
 292 check_file_access (WEdit *edit, const vfs_path_t *filename_vpath, struct stat *st)
     /*   */
 293 {
 294     static uintmax_t threshold = UINTMAX_MAX;
 295     int file;
 296     gchar *errmsg = NULL;
 297     gboolean ret = TRUE;
 298 
 299     // Try opening an existing file
 300     file = mc_open (filename_vpath, O_NONBLOCK | O_RDONLY | O_BINARY, 0666);
 301     if (file < 0)
 302     {
 303         /*
 304          * Try creating the file. O_EXCL prevents following broken links
 305          * and opening existing files.
 306          */
 307         file = mc_open (filename_vpath, O_NONBLOCK | O_RDONLY | O_BINARY | O_CREAT | O_EXCL, 0666);
 308         if (file < 0)
 309         {
 310             file_error_message (_ ("Cannot open\n%s"), vfs_path_as_str (filename_vpath));
 311             goto cleanup;
 312         }
 313 
 314         // New file, delete it if it's not modified or saved
 315         edit->delete_file = 1;
 316     }
 317 
 318     // Check what we have opened
 319     if (mc_fstat (file, st) < 0)
 320     {
 321         file_error_message (_ ("Cannot stat\n%s"), vfs_path_as_str (filename_vpath));
 322         goto cleanup;
 323     }
 324 
 325     // We want to open regular files only
 326     if (!S_ISREG (st->st_mode))
 327     {
 328         errmsg =
 329             g_strdup_printf (_ ("%s\nis not a regular file"), vfs_path_as_str (filename_vpath));
 330         goto cleanup;
 331     }
 332 
 333     // get file size threshold for alarm
 334     if (threshold == UINTMAX_MAX)
 335     {
 336         gboolean err = FALSE;
 337 
 338         threshold = parse_integer (edit_options.filesize_threshold, &err);
 339         if (err)
 340             threshold = filesize_default_threshold;
 341     }
 342 
 343     /*
 344      * Don't delete non-empty files.
 345      * O_EXCL should prevent it, but let's be on the safe side.
 346      */
 347     if (st->st_size > 0)
 348         edit->delete_file = 0;
 349 
 350     if ((uintmax_t) st->st_size > threshold)
 351     {
 352         int act;
 353 
 354         errmsg = g_strdup_printf (_ ("File \"%s\" is too large.\nOpen it anyway?"),
 355                                   vfs_path_as_str (filename_vpath));
 356         act = edit_query_dialog2 (_ ("Warning"), errmsg, _ ("&Yes"), _ ("&No"));
 357         MC_PTR_FREE (errmsg);
 358 
 359         if (act != 0)
 360             ret = FALSE;
 361     }
 362 
 363 cleanup:
 364     (void) mc_close (file);
 365 
 366     if (errmsg != NULL)
 367     {
 368         message (D_ERROR, MSG_ERROR, "%s", errmsg);
 369         g_free (errmsg);
 370         ret = FALSE;
 371     }
 372 
 373     return ret;
 374 }
 375 
 376 /* --------------------------------------------------------------------------------------------- */
 377 
 378 /**
 379  * Open the file and load it into the buffers, either directly or using
 380  * a filter.  Return TRUE on success, FALSE on error.
 381  *
 382  * Fast loading (edit_load_file_fast) is used when the file size is
 383  * known.  In this case the data is read into the buffers by blocks.
 384  * If the file size is not known, the data is loaded byte by byte in
 385  * edit_insert_file.
 386  *
 387  * @param edit editor object
 388  * @return TRUE if file was successfully opened and loaded to buffers, FALSE otherwise
 389  */
 390 static gboolean
 391 edit_load_file (WEdit *edit)
     /*   */
 392 {
 393     gboolean fast_load = TRUE;
 394 
 395     // Cannot do fast load if a filter is used
 396     if (edit_find_filter (edit->filename_vpath) >= 0)
 397         fast_load = FALSE;
 398 
 399     /*
 400      * FIXME: line end translation should disable fast loading as well
 401      * Consider doing fseek() to the end and ftell() for the real size.
 402      */
 403     if (edit->filename_vpath != NULL)
 404     {
 405         /*
 406          * VFS may report file size incorrectly, and slow load is not a big
 407          * deal considering overhead in VFS.
 408          */
 409         if (!vfs_file_is_local (edit->filename_vpath))
 410             fast_load = FALSE;
 411 
 412         // If we are dealing with a real file, check that it exists
 413         if (!check_file_access (edit, edit->filename_vpath, &edit->stat1))
 414         {
 415             edit_clean (edit);
 416             return FALSE;
 417         }
 418     }
 419     else
 420     {
 421         // nothing to load
 422         fast_load = FALSE;
 423     }
 424 
 425     if (fast_load)
 426     {
 427         edit_buffer_init (&edit->buffer, edit->stat1.st_size);
 428 
 429         if (!edit_load_file_fast (&edit->buffer, edit->filename_vpath))
 430         {
 431             edit_clean (edit);
 432             return FALSE;
 433         }
 434     }
 435     else
 436     {
 437         edit_buffer_init (&edit->buffer, 0);
 438 
 439         if (edit->filename_vpath != NULL
 440             && *(vfs_path_get_by_index (edit->filename_vpath, 0)->path) != '\0')
 441         {
 442             edit->undo_stack_disable = 1;
 443             if (edit_insert_file (edit, edit->filename_vpath) < 0)
 444             {
 445                 edit_clean (edit);
 446                 return FALSE;
 447             }
 448             edit->undo_stack_disable = 0;
 449         }
 450     }
 451     edit->lb = LB_ASIS;
 452     return TRUE;
 453 }
 454 
 455 /* --------------------------------------------------------------------------------------------- */
 456 /**
 457  * Restore saved cursor position and/or bookmarks in the file
 458  *
 459  * @param edit editor object
 460  * @param load_position If TRUE, load bookmarks and cursor position and apply them.
 461  *                      If FALSE, load bookmarks only.
 462  */
 463 
 464 static void
 465 edit_load_position (WEdit *edit, gboolean load_position)
     /*   */
 466 {
 467     long line, column;
 468     off_t offset;
 469     off_t b;
 470 
 471     if (edit->filename_vpath == NULL
 472         || *(vfs_path_get_by_index (edit->filename_vpath, 0)->path) == '\0')
 473         return;
 474 
 475     load_file_position (edit->filename_vpath, &line, &column, &offset, &edit->serialized_bookmarks);
 476     // apply bookmarks in any case
 477     book_mark_restore (edit, BOOK_MARK_COLOR);
 478 
 479     if (!load_position)
 480         return;
 481 
 482     if (line > 0)
 483     {
 484         edit_move_to_line (edit, line - 1);
 485         edit->prev_col = column;
 486     }
 487     else if (offset > 0)
 488     {
 489         edit_cursor_move (edit, offset);
 490         line = edit->buffer.curs_line;
 491         edit->search_start = edit->buffer.curs1;
 492     }
 493 
 494     b = edit_buffer_get_current_bol (&edit->buffer);
 495     edit_move_to_prev_col (edit, b);
 496     edit_move_display (edit, line - (WIDGET (edit)->rect.lines / 2));
 497 }
 498 
 499 /* --------------------------------------------------------------------------------------------- */
 500 /** Save cursor position in the file */
 501 
 502 static void
 503 edit_save_position (WEdit *edit)
     /*   */
 504 {
 505     if (edit->filename_vpath == NULL
 506         || *(vfs_path_get_by_index (edit->filename_vpath, 0)->path) == '\0')
 507         return;
 508 
 509     book_mark_serialize (edit, BOOK_MARK_COLOR);
 510     save_file_position (edit->filename_vpath, edit->buffer.curs_line + 1, edit->curs_col,
 511                         edit->buffer.curs1, edit->serialized_bookmarks);
 512     edit->serialized_bookmarks = NULL;
 513 }
 514 
 515 /* --------------------------------------------------------------------------------------------- */
 516 /** Clean the WEdit stricture except the widget part */
 517 
 518 static void
 519 edit_purge_widget (WEdit *edit)
     /*   */
 520 {
 521     size_t len = sizeof (WEdit) - sizeof (Widget);
 522     char *start = (char *) edit + sizeof (Widget);
 523     memset (start, 0, len);
 524 }
 525 
 526 /* --------------------------------------------------------------------------------------------- */
 527 
 528 /*
 529    TODO: if the user undos until the stack bottom, and the stack has not wrapped,
 530    then the file should be as it was when he loaded up. Then set edit->modified to 0.
 531  */
 532 
 533 static long
 534 edit_pop_undo_action (WEdit *edit)
     /*   */
 535 {
 536     long c;
 537     unsigned long sp = edit->undo_stack_pointer;
 538 
 539     if (sp == edit->undo_stack_bottom)
 540         return STACK_BOTTOM;
 541 
 542     sp = (sp - 1) & edit->undo_stack_size_mask;
 543     c = edit->undo_stack[sp];
 544     if (c >= 0)
 545     {
 546         //      edit->undo_stack[sp] = '@';
 547         edit->undo_stack_pointer = (edit->undo_stack_pointer - 1) & edit->undo_stack_size_mask;
 548         return c;
 549     }
 550 
 551     if (sp == edit->undo_stack_bottom)
 552         return STACK_BOTTOM;
 553 
 554     c = edit->undo_stack[(sp - 1) & edit->undo_stack_size_mask];
 555     if (edit->undo_stack[sp] == -2)
 556     {
 557         //      edit->undo_stack[sp] = '@';
 558         edit->undo_stack_pointer = sp;
 559     }
 560     else
 561         edit->undo_stack[sp]++;
 562 
 563     return c;
 564 }
 565 
 566 /* --------------------------------------------------------------------------------------------- */
 567 
 568 static long
 569 edit_pop_redo_action (WEdit *edit)
     /*   */
 570 {
 571     long c;
 572     unsigned long sp = edit->redo_stack_pointer;
 573 
 574     if (sp == edit->redo_stack_bottom)
 575         return STACK_BOTTOM;
 576 
 577     sp = (sp - 1) & edit->redo_stack_size_mask;
 578     c = edit->redo_stack[sp];
 579     if (c >= 0)
 580     {
 581         edit->redo_stack_pointer = (edit->redo_stack_pointer - 1) & edit->redo_stack_size_mask;
 582         return c;
 583     }
 584 
 585     if (sp == edit->redo_stack_bottom)
 586         return STACK_BOTTOM;
 587 
 588     c = edit->redo_stack[(sp - 1) & edit->redo_stack_size_mask];
 589     if (edit->redo_stack[sp] == -2)
 590         edit->redo_stack_pointer = sp;
 591     else
 592         edit->redo_stack[sp]++;
 593 
 594     return c;
 595 }
 596 
 597 /* --------------------------------------------------------------------------------------------- */
 598 
 599 static long
 600 get_prev_undo_action (WEdit *edit)
     /*   */
 601 {
 602     long c;
 603     unsigned long sp = edit->undo_stack_pointer;
 604 
 605     if (sp == edit->undo_stack_bottom)
 606         return STACK_BOTTOM;
 607 
 608     sp = (sp - 1) & edit->undo_stack_size_mask;
 609     c = edit->undo_stack[sp];
 610     if (c >= 0)
 611         return c;
 612 
 613     if (sp == edit->undo_stack_bottom)
 614         return STACK_BOTTOM;
 615 
 616     c = edit->undo_stack[(sp - 1) & edit->undo_stack_size_mask];
 617     return c;
 618 }
 619 
 620 /* --------------------------------------------------------------------------------------------- */
 621 /** is called whenever a modification is made by one of the four routines below */
 622 
 623 static void
 624 edit_modification (WEdit *edit)
     /*   */
 625 {
 626     edit->caches_valid = FALSE;
 627 
 628     // raise lock when file modified
 629     if (edit->modified == 0 && edit->delete_file == 0)
 630         edit->locked = lock_file (edit->filename_vpath);
 631     edit->modified = 1;
 632 }
 633 
 634 /* --------------------------------------------------------------------------------------------- */
 635 /* high level cursor movement commands */
 636 /* --------------------------------------------------------------------------------------------- */
 637 /** check whether cursor is in indent part of line
 638  *
 639  * @param edit editor object
 640  *
 641  * @return TRUE if cursor is in indent, FALSE otherwise
 642  */
 643 
 644 static gboolean
 645 is_in_indent (const edit_buffer_t *buf)
     /*   */
 646 {
 647     off_t p;
 648 
 649     for (p = edit_buffer_get_current_bol (buf); p < buf->curs1; p++)
 650         if (strchr (" \t", edit_buffer_get_byte (buf, p)) == NULL)
 651             return FALSE;
 652 
 653     return TRUE;
 654 }
 655 
 656 /* --------------------------------------------------------------------------------------------- */
 657 /** check whether line in editor is blank or not
 658  *
 659  * @param edit editor object
 660  * @param offset position in file
 661  *
 662  * @return TRUE if line in blank, FALSE otherwise
 663  */
 664 
 665 static gboolean
 666 is_blank (const edit_buffer_t *buf, off_t offset)
     /*   */
 667 {
 668     off_t s, f;
 669 
 670     s = edit_buffer_get_bol (buf, offset);
 671     f = edit_buffer_get_eol (buf, offset);
 672     for (; s < f; s++)
 673     {
 674         int c;
 675 
 676         c = edit_buffer_get_byte (buf, s);
 677         if (!isspace (c))
 678             return FALSE;
 679     }
 680     return TRUE;
 681 }
 682 
 683 /* --------------------------------------------------------------------------------------------- */
 684 /** returns the offset of line i */
 685 
 686 static off_t
 687 edit_find_line (WEdit *edit, long line)
     /*   */
 688 {
 689     long i;
 690     long j = 0;
 691     long m = 2000000000;  // what is the magic number?
 692 
 693     if (!edit->caches_valid)
 694     {
 695         memset (edit->line_numbers, 0, sizeof (edit->line_numbers));
 696         memset (edit->line_offsets, 0, sizeof (edit->line_offsets));
 697         // three offsets that we *know* are line 0 at 0 and these two:
 698         edit->line_numbers[1] = edit->buffer.curs_line;
 699         edit->line_offsets[1] = edit_buffer_get_current_bol (&edit->buffer);
 700         edit->line_numbers[2] = edit->buffer.lines;
 701         edit->line_offsets[2] = edit_buffer_get_bol (&edit->buffer, edit->buffer.size);
 702         edit->caches_valid = TRUE;
 703     }
 704     if (line >= edit->buffer.lines)
 705         return edit->line_offsets[2];
 706     if (line <= 0)
 707         return 0;
 708     // find the closest known point
 709     for (i = 0; i < N_LINE_CACHES; i++)
 710     {
 711         long n;
 712 
 713         n = labs (edit->line_numbers[i] - line);
 714         if (n < m)
 715         {
 716             m = n;
 717             j = i;
 718         }
 719     }
 720     if (m == 0)
 721         return edit->line_offsets[j];  // know the offset exactly
 722     if (m == 1 && j >= 3)
 723         i = j;  // one line different - caller might be looping, so stay in this cache
 724     else
 725         i = 3 + (rand () % (N_LINE_CACHES - 3));
 726     if (line > edit->line_numbers[j])
 727         edit->line_offsets[i] = edit_buffer_get_forward_offset (
 728             &edit->buffer, edit->line_offsets[j], line - edit->line_numbers[j], 0);
 729     else
 730         edit->line_offsets[i] = edit_buffer_get_backward_offset (
 731             &edit->buffer, edit->line_offsets[j], edit->line_numbers[j] - line);
 732     edit->line_numbers[i] = line;
 733     return edit->line_offsets[i];
 734 }
 735 
 736 /* --------------------------------------------------------------------------------------------- */
 737 /** moves up until a blank line is reached, or until just
 738    before a non-blank line is reached */
 739 
 740 static void
 741 edit_move_up_paragraph (WEdit *edit, gboolean do_scroll)
     /*   */
 742 {
 743     long i = 0;
 744 
 745     if (edit->buffer.curs_line > 1)
 746     {
 747         if (!edit_line_is_blank (edit, edit->buffer.curs_line))
 748         {
 749             for (i = edit->buffer.curs_line - 1; i != 0; i--)
 750                 if (edit_line_is_blank (edit, i))
 751                     break;
 752         }
 753         else if (edit_line_is_blank (edit, edit->buffer.curs_line - 1))
 754         {
 755             for (i = edit->buffer.curs_line - 1; i != 0; i--)
 756                 if (!edit_line_is_blank (edit, i))
 757                 {
 758                     i++;
 759                     break;
 760                 }
 761         }
 762         else
 763         {
 764             for (i = edit->buffer.curs_line - 1; i != 0; i--)
 765                 if (edit_line_is_blank (edit, i))
 766                     break;
 767         }
 768     }
 769 
 770     edit_move_up (edit, edit->buffer.curs_line - i, do_scroll);
 771 }
 772 
 773 /* --------------------------------------------------------------------------------------------- */
 774 /** moves down until a blank line is reached, or until just
 775    before a non-blank line is reached */
 776 
 777 static void
 778 edit_move_down_paragraph (WEdit *edit, gboolean do_scroll)
     /*   */
 779 {
 780     long i;
 781 
 782     if (edit->buffer.curs_line >= edit->buffer.lines - 1)
 783         i = edit->buffer.lines;
 784     else if (!edit_line_is_blank (edit, edit->buffer.curs_line))
 785     {
 786         for (i = edit->buffer.curs_line + 1; i != 0; i++)
 787             if (edit_line_is_blank (edit, i) || i >= edit->buffer.lines)
 788                 break;
 789     }
 790     else if (edit_line_is_blank (edit, edit->buffer.curs_line + 1))
 791     {
 792         for (i = edit->buffer.curs_line + 1; i != 0; i++)
 793             if (!edit_line_is_blank (edit, i) || i > edit->buffer.lines)
 794             {
 795                 i--;
 796                 break;
 797             }
 798     }
 799     else
 800     {
 801         for (i = edit->buffer.curs_line + 1; i != 0; i++)
 802             if (edit_line_is_blank (edit, i) || i >= edit->buffer.lines)
 803                 break;
 804     }
 805     edit_move_down (edit, i - edit->buffer.curs_line, do_scroll);
 806 }
 807 
 808 /* --------------------------------------------------------------------------------------------- */
 809 
 810 static void
 811 edit_begin_page (WEdit *edit)
     /*   */
 812 {
 813     edit_update_curs_row (edit);
 814     edit_move_up (edit, edit->curs_row, FALSE);
 815 }
 816 
 817 /* --------------------------------------------------------------------------------------------- */
 818 
 819 static void
 820 edit_end_page (WEdit *edit)
     /*   */
 821 {
 822     edit_update_curs_row (edit);
 823     edit_move_down (edit, WIDGET (edit)->rect.lines - edit->curs_row - (edit->fullscreen ? 1 : 3),
 824                     FALSE);
 825 }
 826 
 827 /* --------------------------------------------------------------------------------------------- */
 828 /** goto beginning of text */
 829 
 830 static void
 831 edit_move_to_top (WEdit *edit)
     /*   */
 832 {
 833     if (edit->buffer.curs_line != 0)
 834     {
 835         edit_cursor_move (edit, -edit->buffer.curs1);
 836         edit_move_to_prev_col (edit, 0);
 837         edit->force |= REDRAW_PAGE;
 838         edit->search_start = 0;
 839         edit_update_curs_row (edit);
 840     }
 841 }
 842 
 843 /* --------------------------------------------------------------------------------------------- */
 844 /** goto end of text */
 845 
 846 static void
 847 edit_move_to_bottom (WEdit *edit)
     /*   */
 848 {
 849     if (edit->buffer.curs_line < edit->buffer.lines)
 850     {
 851         edit_move_down (edit, edit->buffer.lines - edit->curs_row, FALSE);
 852         edit->start_display = edit->buffer.size;
 853         edit->start_line = edit->buffer.lines;
 854         edit_scroll_upward (edit, WIDGET (edit)->rect.lines - 1);
 855         edit->force |= REDRAW_PAGE;
 856     }
 857 }
 858 
 859 /* --------------------------------------------------------------------------------------------- */
 860 /** goto beginning of line */
 861 
 862 static void
 863 edit_cursor_to_bol (WEdit *edit)
     /*   */
 864 {
 865     off_t b;
 866 
 867     b = edit_buffer_get_current_bol (&edit->buffer);
 868     edit_cursor_move (edit, b - edit->buffer.curs1);
 869     edit->search_start = edit->buffer.curs1;
 870     edit->prev_col = edit_get_col (edit);
 871     edit->over_col = 0;
 872 }
 873 
 874 /* --------------------------------------------------------------------------------------------- */
 875 /** goto end of line */
 876 
 877 static void
 878 edit_cursor_to_eol (WEdit *edit)
     /*   */
 879 {
 880     off_t b;
 881 
 882     b = edit_buffer_get_current_eol (&edit->buffer);
 883     edit_cursor_move (edit, b - edit->buffer.curs1);
 884     edit->search_start = edit->buffer.curs1;
 885     edit->prev_col = edit_get_col (edit);
 886     edit->over_col = 0;
 887 }
 888 
 889 /* --------------------------------------------------------------------------------------------- */
 890 
 891 static unsigned long
 892 my_type_of (int c)
     /*   */
 893 {
 894     unsigned long r = 0;
 895     const char *q;
 896     const char chars_move_whole_word[] =
 897         "!=&|<>^~ !:;, !'!`!.?!\"!( !) !{ !} !Aa0 !+-*/= |<> ![ !] !\\#! ";
 898 
 899     if (c == 0)
 900         return 0;
 901     if (c == '!')
 902         return 2;
 903 
 904     if (g_ascii_isupper ((gchar) c))
 905         c = 'A';
 906     else if (g_ascii_islower ((gchar) c))
 907         c = 'a';
 908     else if (g_ascii_isalpha (c))
 909         c = 'a';
 910     else if (isdigit (c))
 911         c = '0';
 912     else if (isspace (c))
 913         c = ' ';
 914     q = strchr (chars_move_whole_word, c);
 915     if (q == NULL)
 916         return 0xFFFFFFFFUL;
 917 
 918     do
 919     {
 920         unsigned long x;
 921         const char *p;
 922 
 923         for (x = 1, p = chars_move_whole_word; p < q; p++)
 924             if (*p == '!')
 925                 x <<= 1;
 926         r |= x;
 927     }
 928     while ((q = strchr (q + 1, c)) != NULL);
 929 
 930     return r;
 931 }
 932 
 933 /* --------------------------------------------------------------------------------------------- */
 934 
 935 static void
 936 edit_left_word_move (WEdit *edit, int s)
     /*   */
 937 {
 938     while (TRUE)
 939     {
 940         int c1, c2;
 941 
 942         if (edit->column_highlight && edit->mark1 != edit->mark2 && edit->over_col == 0
 943             && edit->buffer.curs1 == edit_buffer_get_current_bol (&edit->buffer))
 944             break;
 945         edit_cursor_move (edit, -1);
 946         if (edit->buffer.curs1 == 0)
 947             break;
 948         c1 = edit_buffer_get_previous_byte (&edit->buffer);
 949         if (c1 == '\n')
 950             break;
 951         c2 = edit_buffer_get_current_byte (&edit->buffer);
 952         if (c2 == '\n')
 953             break;
 954         if ((my_type_of (c1) & my_type_of (c2)) == 0)
 955             break;
 956         if (isspace (c1) && !isspace (c2))
 957             break;
 958         if (s != 0 && !isspace (c1) && isspace (c2))
 959             break;
 960     }
 961 }
 962 
 963 /* --------------------------------------------------------------------------------------------- */
 964 
 965 static void
 966 edit_left_word_move_cmd (WEdit *edit)
     /*   */
 967 {
 968     edit_left_word_move (edit, 0);
 969     edit->force |= REDRAW_PAGE;
 970 }
 971 
 972 /* --------------------------------------------------------------------------------------------- */
 973 
 974 static void
 975 edit_right_word_move (WEdit *edit, int s)
     /*   */
 976 {
 977     while (TRUE)
 978     {
 979         int c1, c2;
 980 
 981         if (edit->column_highlight && edit->mark1 != edit->mark2 && edit->over_col == 0
 982             && edit->buffer.curs1 == edit_buffer_get_current_eol (&edit->buffer))
 983             break;
 984         edit_cursor_move (edit, 1);
 985         if (edit->buffer.curs1 >= edit->buffer.size)
 986             break;
 987         c1 = edit_buffer_get_previous_byte (&edit->buffer);
 988         if (c1 == '\n')
 989             break;
 990         c2 = edit_buffer_get_current_byte (&edit->buffer);
 991         if (c2 == '\n')
 992             break;
 993         if ((my_type_of (c1) & my_type_of (c2)) == 0)
 994             break;
 995         if (isspace (c1) && !isspace (c2))
 996             break;
 997         if (s != 0 && !isspace (c1) && isspace (c2))
 998             break;
 999     }
1000 }
1001 
1002 /* --------------------------------------------------------------------------------------------- */
1003 
1004 static void
1005 edit_right_word_move_cmd (WEdit *edit)
     /*   */
1006 {
1007     edit_right_word_move (edit, 0);
1008     edit->force |= REDRAW_PAGE;
1009 }
1010 
1011 /* --------------------------------------------------------------------------------------------- */
1012 
1013 static void
1014 edit_right_char_move_cmd (WEdit *edit)
     /*   */
1015 {
1016     int char_length = 1;
1017     int c;
1018 
1019     if (edit->utf8)
1020     {
1021         c = edit_buffer_get_utf (&edit->buffer, edit->buffer.curs1, &char_length);
1022         if (char_length < 1)
1023             char_length = 1;
1024     }
1025     else
1026         c = edit_buffer_get_current_byte (&edit->buffer);
1027 
1028     if (edit_options.cursor_beyond_eol && c == '\n')
1029         edit->over_col++;
1030     else
1031         edit_cursor_move (edit, char_length);
1032 }
1033 
1034 /* --------------------------------------------------------------------------------------------- */
1035 
1036 static void
1037 edit_left_char_move_cmd (WEdit *edit)
     /*   */
1038 {
1039     int char_length = 1;
1040 
1041     if (edit->column_highlight && edit_options.cursor_beyond_eol && edit->mark1 != edit->mark2
1042         && edit->over_col == 0 && edit->buffer.curs1 == edit_buffer_get_current_bol (&edit->buffer))
1043         return;
1044 
1045     if (edit->utf8)
1046     {
1047         edit_buffer_get_prev_utf (&edit->buffer, edit->buffer.curs1, &char_length);
1048         if (char_length < 1)
1049             char_length = 1;
1050     }
1051 
1052     if (edit_options.cursor_beyond_eol && edit->over_col > 0)
1053         edit->over_col--;
1054     else
1055         edit_cursor_move (edit, -char_length);
1056 }
1057 
1058 /* --------------------------------------------------------------------------------------------- */
1059 /** Up or down cursor moving.
1060  direction = TRUE - move up
1061            = FALSE - move down
1062 */
1063 
1064 static void
1065 edit_move_updown (WEdit *edit, long lines, gboolean do_scroll, gboolean direction)
     /*   */
1066 {
1067     long p;
1068     long l = direction ? edit->buffer.curs_line : edit->buffer.lines - edit->buffer.curs_line;
1069 
1070     if (lines > l)
1071         lines = l;
1072 
1073     if (lines == 0)
1074         return;
1075 
1076     if (lines > 1)
1077         edit->force |= REDRAW_PAGE;
1078     if (do_scroll)
1079     {
1080         if (direction)
1081             edit_scroll_upward (edit, lines);
1082         else
1083             edit_scroll_downward (edit, lines);
1084     }
1085     p = edit_buffer_get_current_bol (&edit->buffer);
1086     p = direction ? edit_buffer_get_backward_offset (&edit->buffer, p, lines)
1087                   : edit_buffer_get_forward_offset (&edit->buffer, p, lines, 0);
1088     edit_cursor_move (edit, p - edit->buffer.curs1);
1089     edit_move_to_prev_col (edit, p);
1090 
1091     // search start of current multibyte char (like CJK)
1092     if (edit->buffer.curs1 > 0 && edit->buffer.curs1 + 1 < edit->buffer.size
1093         && edit_buffer_get_current_byte (&edit->buffer) >= 256)
1094     {
1095         edit_right_char_move_cmd (edit);
1096         edit_left_char_move_cmd (edit);
1097     }
1098 
1099     edit->search_start = edit->buffer.curs1;
1100     edit->found_len = 0;
1101 }
1102 
1103 /* --------------------------------------------------------------------------------------------- */
1104 
1105 static void
1106 edit_right_delete_word (WEdit *edit)
     /*   */
1107 {
1108     while (edit->buffer.curs1 < edit->buffer.size)
1109     {
1110         int c1, c2;
1111 
1112         c1 = edit_delete (edit, TRUE);
1113         if (c1 == '\n')
1114             break;
1115         c2 = edit_buffer_get_current_byte (&edit->buffer);
1116         if (c2 == '\n')
1117             break;
1118         if ((isspace (c1) == 0) != (isspace (c2) == 0))
1119             break;
1120         if ((my_type_of (c1) & my_type_of (c2)) == 0)
1121             break;
1122     }
1123 }
1124 
1125 /* --------------------------------------------------------------------------------------------- */
1126 
1127 static void
1128 edit_left_delete_word (WEdit *edit)
     /*   */
1129 {
1130     while (edit->buffer.curs1 > 0)
1131     {
1132         int c1, c2;
1133 
1134         c1 = edit_backspace (edit, TRUE);
1135         if (c1 == '\n')
1136             break;
1137         c2 = edit_buffer_get_previous_byte (&edit->buffer);
1138         if (c2 == '\n')
1139             break;
1140         if ((isspace (c1) == 0) != (isspace (c2) == 0))
1141             break;
1142         if ((my_type_of (c1) & my_type_of (c2)) == 0)
1143             break;
1144     }
1145 }
1146 
1147 /* --------------------------------------------------------------------------------------------- */
1148 /**
1149    the start column position is not recorded, and hence does not
1150    undo as it happed. But who would notice.
1151  */
1152 
1153 static void
1154 edit_do_undo (WEdit *edit)
     /*   */
1155 {
1156     long ac;
1157     long count = 0;
1158 
1159     edit->undo_stack_disable = 1;  // don't record undo's onto undo stack!
1160     edit->over_col = 0;
1161 
1162     while ((ac = edit_pop_undo_action (edit)) < KEY_PRESS)
1163     {
1164         off_t b;
1165 
1166         switch ((int) ac)
1167         {
1168         case STACK_BOTTOM:
1169             goto done_undo;
1170         case CURS_RIGHT:
1171             edit_cursor_move (edit, 1);
1172             break;
1173         case CURS_LEFT:
1174             edit_cursor_move (edit, -1);
1175             break;
1176         case BACKSPACE:
1177         case BACKSPACE_BR:
1178             edit_backspace (edit, TRUE);
1179             break;
1180         case DELCHAR:
1181         case DELCHAR_BR:
1182             edit_delete (edit, TRUE);
1183             break;
1184         case COLUMN_ON:
1185             edit->column_highlight = 1;
1186             break;
1187         case COLUMN_OFF:
1188             edit->column_highlight = 0;
1189             break;
1190         default:
1191             break;
1192         }
1193         if (ac >= 256 && ac < 512)
1194             edit_insert_ahead (edit, ac - 256);
1195         if (ac >= 0 && ac < 256)
1196             edit_insert (edit, ac);
1197 
1198         if (ac >= MARK_1 - 2 && ac < MARK_2 - 2)
1199         {
1200             edit->mark1 = ac - MARK_1;
1201             b = edit_buffer_get_bol (&edit->buffer, edit->mark1);
1202             edit->column1 = (long) edit_move_forward3 (edit, b, 0, edit->mark1);
1203         }
1204         if (ac >= MARK_2 - 2 && ac < MARK_CURS - 2)
1205         {
1206             edit->mark2 = ac - MARK_2;
1207             b = edit_buffer_get_bol (&edit->buffer, edit->mark2);
1208             edit->column2 = (long) edit_move_forward3 (edit, b, 0, edit->mark2);
1209         }
1210         else if (ac >= MARK_CURS - 2 && ac < KEY_PRESS)
1211         {
1212             edit->end_mark_curs = ac - MARK_CURS;
1213         }
1214         if (count++)
1215             edit->force |= REDRAW_PAGE;  // more than one pop usually means something big
1216     }
1217 
1218     if (edit->start_display > ac - KEY_PRESS)
1219     {
1220         edit->start_line -=
1221             edit_buffer_count_lines (&edit->buffer, ac - KEY_PRESS, edit->start_display);
1222         edit->force |= REDRAW_PAGE;
1223     }
1224     else if (edit->start_display < ac - KEY_PRESS)
1225     {
1226         edit->start_line +=
1227             edit_buffer_count_lines (&edit->buffer, edit->start_display, ac - KEY_PRESS);
1228         edit->force |= REDRAW_PAGE;
1229     }
1230     edit->start_display = ac - KEY_PRESS;  // see push and pop above
1231     edit_update_curs_row (edit);
1232 
1233 done_undo:
1234     edit->undo_stack_disable = 0;
1235 }
1236 
1237 /* --------------------------------------------------------------------------------------------- */
1238 
1239 static void
1240 edit_do_redo (WEdit *edit)
     /*   */
1241 {
1242     long ac;
1243     long count = 0;
1244 
1245     if (edit->redo_stack_reset)
1246         return;
1247 
1248     edit->over_col = 0;
1249 
1250     while ((ac = edit_pop_redo_action (edit)) < KEY_PRESS)
1251     {
1252         off_t b;
1253 
1254         switch ((int) ac)
1255         {
1256         case STACK_BOTTOM:
1257             goto done_redo;
1258         case CURS_RIGHT:
1259             edit_cursor_move (edit, 1);
1260             break;
1261         case CURS_LEFT:
1262             edit_cursor_move (edit, -1);
1263             break;
1264         case BACKSPACE:
1265             edit_backspace (edit, TRUE);
1266             break;
1267         case DELCHAR:
1268             edit_delete (edit, TRUE);
1269             break;
1270         case COLUMN_ON:
1271             edit->column_highlight = 1;
1272             break;
1273         case COLUMN_OFF:
1274             edit->column_highlight = 0;
1275             break;
1276         default:
1277             break;
1278         }
1279         if (ac >= 256 && ac < 512)
1280             edit_insert_ahead (edit, ac - 256);
1281         if (ac >= 0 && ac < 256)
1282             edit_insert (edit, ac);
1283 
1284         if (ac >= MARK_1 - 2 && ac < MARK_2 - 2)
1285         {
1286             edit->mark1 = ac - MARK_1;
1287             b = edit_buffer_get_bol (&edit->buffer, edit->mark1);
1288             edit->column1 = (long) edit_move_forward3 (edit, b, 0, edit->mark1);
1289         }
1290         else if (ac >= MARK_2 - 2 && ac < KEY_PRESS)
1291         {
1292             edit->mark2 = ac - MARK_2;
1293             b = edit_buffer_get_bol (&edit->buffer, edit->mark2);
1294             edit->column2 = (long) edit_move_forward3 (edit, b, 0, edit->mark2);
1295         }
1296         // more than one pop usually means something big
1297         if (count++ != 0)
1298             edit->force |= REDRAW_PAGE;
1299     }
1300 
1301     if (edit->start_display > ac - KEY_PRESS)
1302     {
1303         edit->start_line -=
1304             edit_buffer_count_lines (&edit->buffer, ac - KEY_PRESS, edit->start_display);
1305         edit->force |= REDRAW_PAGE;
1306     }
1307     else if (edit->start_display < ac - KEY_PRESS)
1308     {
1309         edit->start_line +=
1310             edit_buffer_count_lines (&edit->buffer, edit->start_display, ac - KEY_PRESS);
1311         edit->force |= REDRAW_PAGE;
1312     }
1313     edit->start_display = ac - KEY_PRESS;  // see push and pop above
1314     edit_update_curs_row (edit);
1315 
1316 done_redo:;
1317 }
1318 
1319 /* --------------------------------------------------------------------------------------------- */
1320 
1321 static void
1322 edit_group_undo (WEdit *edit)
     /*   */
1323 {
1324     long ac = KEY_PRESS;
1325     long cur_ac = KEY_PRESS;
1326 
1327     while (ac != STACK_BOTTOM && ac == cur_ac)
1328     {
1329         cur_ac = get_prev_undo_action (edit);
1330         edit_do_undo (edit);
1331         ac = get_prev_undo_action (edit);
1332         /* exit from cycle if edit_options.group_undo is not set,
1333          * and make single UNDO operation
1334          */
1335         if (!edit_options.group_undo)
1336             ac = STACK_BOTTOM;
1337     }
1338 }
1339 
1340 /* --------------------------------------------------------------------------------------------- */
1341 
1342 static void
1343 edit_delete_to_line_end (WEdit *edit)
     /*   */
1344 {
1345     while (edit_buffer_get_current_byte (&edit->buffer) != '\n' && edit->buffer.curs2 != 0)
1346         edit_delete (edit, TRUE);
1347 }
1348 
1349 /* --------------------------------------------------------------------------------------------- */
1350 
1351 static void
1352 edit_delete_to_line_begin (WEdit *edit)
     /*   */
1353 {
1354     while (edit_buffer_get_previous_byte (&edit->buffer) != '\n' && edit->buffer.curs1 != 0)
1355         edit_backspace (edit, TRUE);
1356 }
1357 
1358 /* --------------------------------------------------------------------------------------------- */
1359 
1360 static gboolean
1361 is_aligned_on_a_tab (WEdit *edit)
     /*   */
1362 {
1363     long curs_col;
1364 
1365     edit_update_curs_col (edit);
1366     curs_col = edit->curs_col % (TAB_SIZE * space_width);
1367     return (curs_col == 0 || curs_col == (HALF_TAB_SIZE * space_width));
1368 }
1369 
1370 /* --------------------------------------------------------------------------------------------- */
1371 
1372 static gboolean
1373 right_of_four_spaces (WEdit *edit)
     /*   */
1374 {
1375     int i;
1376     int ch = 0;
1377 
1378     for (i = 1; i <= HALF_TAB_SIZE; i++)
1379         ch |= edit_buffer_get_byte (&edit->buffer, edit->buffer.curs1 - i);
1380 
1381     return (ch == ' ' && is_aligned_on_a_tab (edit));
1382 }
1383 
1384 /* --------------------------------------------------------------------------------------------- */
1385 
1386 static gboolean
1387 left_of_four_spaces (WEdit *edit)
     /*   */
1388 {
1389     int i, ch = 0;
1390 
1391     for (i = 0; i < HALF_TAB_SIZE; i++)
1392         ch |= edit_buffer_get_byte (&edit->buffer, edit->buffer.curs1 + i);
1393 
1394     return (ch == ' ' && is_aligned_on_a_tab (edit));
1395 }
1396 
1397 /* --------------------------------------------------------------------------------------------- */
1398 
1399 static void
1400 edit_auto_indent (WEdit *edit)
     /*   */
1401 {
1402     off_t p;
1403 
1404     p = edit->buffer.curs1;
1405     // use the previous line as a template
1406     p = edit_buffer_get_backward_offset (&edit->buffer, p, 1);
1407     // copy the leading whitespace of the line
1408     while (TRUE)
1409     {  // no range check - the line _is_ \n-terminated
1410         char c;
1411 
1412         c = edit_buffer_get_byte (&edit->buffer, p++);
1413         if (!whitespace (c))
1414             break;
1415         edit_insert (edit, c);
1416     }
1417 }
1418 
1419 /* --------------------------------------------------------------------------------------------- */
1420 
1421 static inline void
1422 edit_double_newline (WEdit *edit)
     /*   */
1423 {
1424     edit_insert (edit, '\n');
1425     if (edit_buffer_get_current_byte (&edit->buffer) == '\n'
1426         || edit_buffer_get_byte (&edit->buffer, edit->buffer.curs1 - 2) == '\n')
1427         return;
1428     edit->force |= REDRAW_PAGE;
1429     edit_insert (edit, '\n');
1430 }
1431 
1432 /* --------------------------------------------------------------------------------------------- */
1433 
1434 static void
1435 insert_spaces_tab (WEdit *edit, gboolean half)
     /*   */
1436 {
1437     long i;
1438 
1439     edit_update_curs_col (edit);
1440     i = TAB_SIZE * space_width;
1441     if (half)
1442         i /= 2;
1443     if (i != 0)
1444         for (i = ((edit->curs_col / i) + 1) * i - edit->curs_col; i > 0; i -= space_width)
1445             edit_insert (edit, ' ');
1446 }
1447 
1448 /* --------------------------------------------------------------------------------------------- */
1449 
1450 static inline void
1451 edit_tab_cmd (WEdit *edit)
     /*   */
1452 {
1453     if (edit_options.fake_half_tabs && is_in_indent (&edit->buffer))
1454     {
1455         /* insert a half tab (usually four spaces) unless there is a
1456            half tab already behind, then delete it and insert a
1457            full tab. */
1458         if (edit_options.fill_tabs_with_spaces || !right_of_four_spaces (edit))
1459             insert_spaces_tab (edit, TRUE);
1460         else
1461         {
1462             int i;
1463 
1464             for (i = 1; i <= HALF_TAB_SIZE; i++)
1465                 edit_backspace (edit, TRUE);
1466             edit_insert (edit, '\t');
1467         }
1468     }
1469     else if (edit_options.fill_tabs_with_spaces)
1470         insert_spaces_tab (edit, FALSE);
1471     else
1472         edit_insert (edit, '\t');
1473 }
1474 
1475 /* --------------------------------------------------------------------------------------------- */
1476 
1477 static void
1478 check_and_wrap_line (WEdit *edit)
     /*   */
1479 {
1480     off_t curs;
1481 
1482     if (!edit_options.typewriter_wrap)
1483         return;
1484     edit_update_curs_col (edit);
1485     if (edit->curs_col < edit_options.word_wrap_line_length)
1486         return;
1487     curs = edit->buffer.curs1;
1488     while (TRUE)
1489     {
1490         int c;
1491 
1492         curs--;
1493         c = edit_buffer_get_byte (&edit->buffer, curs);
1494         if (c == '\n' || curs <= 0)
1495         {
1496             edit_insert (edit, '\n');
1497             return;
1498         }
1499         if (whitespace (c))
1500         {
1501             off_t current = edit->buffer.curs1;
1502             edit_cursor_move (edit, curs - edit->buffer.curs1 + 1);
1503             edit_insert (edit, '\n');
1504             edit_cursor_move (edit, current - edit->buffer.curs1 + 1);
1505             return;
1506         }
1507     }
1508 }
1509 
1510 /* --------------------------------------------------------------------------------------------- */
1511 /** this find the matching bracket in either direction, and sets edit->bracket
1512  *
1513  * @param edit editor object
1514  * @param in_screen search only on the current screen
1515  * @param furthest_bracket_search count of the bytes for search
1516  *
1517  * @return position of the found bracket (-1 if no match)
1518  */
1519 
1520 static off_t
1521 edit_get_bracket (WEdit *edit, gboolean in_screen, unsigned long furthest_bracket_search)
     /*   */
1522 {
1523     const char *const b = "{}{[][()(", *p;
1524     int i = 1, inc = -1, c, d, n = 0;
1525     unsigned long j = 0;
1526     off_t q;
1527 
1528     edit_update_curs_row (edit);
1529     c = edit_buffer_get_current_byte (&edit->buffer);
1530     p = strchr (b, c);
1531     // not on a bracket at all
1532     if (p == NULL || *p == '\0')
1533         return -1;
1534     // the matching bracket
1535     d = p[1];
1536     // going left or right?
1537     if (strchr ("{[(", c) != NULL)
1538         inc = 1;
1539     // no limit
1540     if (furthest_bracket_search == 0)
1541         furthest_bracket_search--;  // ULONG_MAX
1542     for (q = edit->buffer.curs1 + inc;; q += inc)
1543     {
1544         int a;
1545 
1546         // out of buffer?
1547         if (q >= edit->buffer.size || q < 0)
1548             break;
1549         a = edit_buffer_get_byte (&edit->buffer, q);
1550         // don't want to eat CPU
1551         if (j++ > furthest_bracket_search)
1552             break;
1553         // out of screen?
1554         if (in_screen)
1555         {
1556             if (q < edit->start_display)
1557                 break;
1558             // count lines if searching downward
1559             if (inc > 0 && a == '\n')
1560                 if (n++ >= WIDGET (edit)->rect.lines - edit->curs_row)  // out of screen
1561                     break;
1562         }
1563         // count bracket depth
1564         i += (a == c) - (a == d);
1565         // return if bracket depth is zero
1566         if (i == 0)
1567             return q;
1568     }
1569     // no match
1570     return -1;
1571 }
1572 
1573 /* --------------------------------------------------------------------------------------------- */
1574 
1575 static inline void
1576 edit_goto_matching_bracket (WEdit *edit)
     /*   */
1577 {
1578     off_t q;
1579 
1580     q = edit_get_bracket (edit, 0, 0);
1581     if (q >= 0)
1582     {
1583         edit->bracket = edit->buffer.curs1;
1584         edit->force |= REDRAW_PAGE;
1585         edit_cursor_move (edit, q - edit->buffer.curs1);
1586     }
1587 }
1588 
1589 /* --------------------------------------------------------------------------------------------- */
1590 
1591 static void
1592 edit_move_block_to_right (WEdit *edit)
     /*   */
1593 {
1594     off_t start_mark, end_mark;
1595     long cur_bol, start_bol;
1596 
1597     if (!eval_marks (edit, &start_mark, &end_mark))
1598         return;
1599 
1600     start_bol = edit_buffer_get_bol (&edit->buffer, start_mark);
1601     cur_bol = edit_buffer_get_bol (&edit->buffer, end_mark - 1);
1602 
1603     do
1604     {
1605         off_t b;
1606 
1607         edit_cursor_move (edit, cur_bol - edit->buffer.curs1);
1608         if (!edit_line_is_blank (edit, edit->buffer.curs_line))
1609         {
1610             if (edit_options.fill_tabs_with_spaces)
1611                 insert_spaces_tab (edit, edit_options.fake_half_tabs);
1612             else
1613                 edit_insert (edit, '\t');
1614 
1615             b = edit_buffer_get_bol (&edit->buffer, cur_bol);
1616             edit_cursor_move (edit, b - edit->buffer.curs1);
1617         }
1618 
1619         if (cur_bol == 0)
1620             break;
1621 
1622         cur_bol = edit_buffer_get_bol (&edit->buffer, cur_bol - 1);
1623     }
1624     while (cur_bol >= start_bol);
1625 
1626     edit->force |= REDRAW_PAGE;
1627 }
1628 
1629 /* --------------------------------------------------------------------------------------------- */
1630 
1631 static void
1632 edit_move_block_to_left (WEdit *edit)
     /*   */
1633 {
1634     off_t start_mark, end_mark;
1635     off_t cur_bol, start_bol;
1636 
1637     if (!eval_marks (edit, &start_mark, &end_mark))
1638         return;
1639 
1640     start_bol = edit_buffer_get_bol (&edit->buffer, start_mark);
1641     cur_bol = edit_buffer_get_bol (&edit->buffer, end_mark - 1);
1642 
1643     do
1644     {
1645         int del_tab_width;
1646         int next_char;
1647 
1648         edit_cursor_move (edit, cur_bol - edit->buffer.curs1);
1649 
1650         del_tab_width = edit_options.fake_half_tabs ? HALF_TAB_SIZE : TAB_SIZE;
1651 
1652         next_char = edit_buffer_get_current_byte (&edit->buffer);
1653         if (next_char == '\t')
1654             edit_delete (edit, TRUE);
1655         else if (next_char == ' ')
1656         {
1657             int i;
1658 
1659             for (i = 0; i < del_tab_width; i++)
1660             {
1661                 if (next_char == ' ')
1662                     edit_delete (edit, TRUE);
1663                 next_char = edit_buffer_get_current_byte (&edit->buffer);
1664             }
1665         }
1666 
1667         if (cur_bol == 0)
1668             break;
1669 
1670         cur_bol = edit_buffer_get_bol (&edit->buffer, cur_bol - 1);
1671     }
1672     while (cur_bol >= start_bol);
1673 
1674     edit->force |= REDRAW_PAGE;
1675 }
1676 
1677 /* --------------------------------------------------------------------------------------------- */
1678 /**
1679  * prints at the cursor
1680  * @return number of chars printed
1681  */
1682 
1683 static size_t
1684 edit_print_string (WEdit *e, const char *s)
     /*   */
1685 {
1686     size_t i;
1687 
1688     for (i = 0; s[i] != '\0'; i++)
1689         edit_execute_cmd (e, CK_InsertChar, (unsigned char) s[i]);
1690     e->force |= REDRAW_COMPLETELY;
1691     edit_update_screen (e);
1692     return i;
1693 }
1694 
1695 /* --------------------------------------------------------------------------------------------- */
1696 
1697 static off_t
1698 edit_insert_column_from_file (WEdit *edit, int file, off_t *start_pos, off_t *end_pos, long *col1,
     /*   */
1699                               long *col2)
1700 {
1701     off_t cursor;
1702     long col;
1703     off_t blocklen = -1, width = 0;
1704     unsigned char *data;
1705 
1706     cursor = edit->buffer.curs1;
1707     col = edit_get_col (edit);
1708     data = g_malloc0 (TEMP_BUF_LEN);
1709 
1710     while ((blocklen = mc_read (file, (char *) data, TEMP_BUF_LEN)) > 0)
1711     {
1712         off_t i;
1713         char *pn;
1714 
1715         pn = strchr ((char *) data, '\n');
1716         width = pn == NULL ? blocklen : pn - (char *) data;
1717 
1718         for (i = 0; i < blocklen; i++)
1719         {
1720             if (data[i] != '\n')
1721                 edit_insert (edit, data[i]);
1722             else
1723             {  // fill in and move to next line
1724                 long l;
1725                 off_t p;
1726 
1727                 if (edit_buffer_get_current_byte (&edit->buffer) != '\n')
1728                     for (l = width - (edit_get_col (edit) - col); l > 0; l -= space_width)
1729                         edit_insert (edit, ' ');
1730 
1731                 for (p = edit->buffer.curs1;; p++)
1732                 {
1733                     if (p == edit->buffer.size)
1734                     {
1735                         edit_cursor_move (edit, edit->buffer.size - edit->buffer.curs1);
1736                         edit_insert_ahead (edit, '\n');
1737                         p++;
1738                         break;
1739                     }
1740                     if (edit_buffer_get_byte (&edit->buffer, p) == '\n')
1741                     {
1742                         p++;
1743                         break;
1744                     }
1745                 }
1746 
1747                 edit_cursor_move (edit, edit_move_forward3 (edit, p, col, 0) - edit->buffer.curs1);
1748 
1749                 for (l = col - edit_get_col (edit); l >= space_width; l -= space_width)
1750                     edit_insert (edit, ' ');
1751             }
1752         }
1753     }
1754     *col1 = col;
1755     *col2 = col + width;
1756     *start_pos = cursor;
1757     *end_pos = edit->buffer.curs1;
1758     edit_cursor_move (edit, cursor - edit->buffer.curs1);
1759     g_free (data);
1760 
1761     return blocklen;
1762 }
1763 
1764 /* --------------------------------------------------------------------------------------------- */
1765 /*** public functions ****************************************************************************/
1766 /* --------------------------------------------------------------------------------------------- */
1767 
1768 /** User edit menu, like user menu (F2) but only in editor. */
1769 
1770 void
1771 edit_user_menu (WEdit *edit, const char *menu_file, int selected_entry)
     /*   */
1772 {
1773     char *block_file;
1774     gboolean mark;
1775     off_t curs;
1776     off_t start_mark, end_mark;
1777     struct stat status;
1778     vfs_path_t *block_file_vpath;
1779 
1780     block_file = mc_config_get_full_path (EDIT_HOME_BLOCK_FILE);
1781     block_file_vpath = vfs_path_from_str (block_file);
1782     curs = edit->buffer.curs1;
1783     mark = eval_marks (edit, &start_mark, &end_mark);
1784     if (mark)
1785         edit_save_block (edit, block_file, start_mark, end_mark);
1786 
1787     // run shell scripts from menu
1788     if (user_menu_cmd (CONST_WIDGET (edit), menu_file, selected_entry)
1789         && (mc_stat (block_file_vpath, &status) == 0) && (status.st_size != 0))
1790     {
1791         gboolean rc = TRUE;
1792         FILE *fd;
1793 
1794         // i.e. we have marked block
1795         if (mark)
1796             rc = edit_block_delete_cmd (edit);
1797 
1798         if (rc)
1799         {
1800             off_t ins_len;
1801 
1802             ins_len = edit_insert_file (edit, block_file_vpath);
1803             if (mark && ins_len > 0)
1804                 edit_set_markers (edit, start_mark, start_mark + ins_len, 0, 0);
1805         }
1806         // truncate block file
1807         fd = fopen (block_file, "w");
1808         if (fd != NULL)
1809             fclose (fd);
1810     }
1811     g_free (block_file);
1812     vfs_path_free (block_file_vpath, TRUE);
1813 
1814     edit_cursor_move (edit, curs - edit->buffer.curs1);
1815     edit->force |= REDRAW_PAGE;
1816     widget_draw (WIDGET (edit));
1817 }
1818 
1819 /* --------------------------------------------------------------------------------------------- */
1820 
1821 char *
1822 edit_get_write_filter (const vfs_path_t *write_name_vpath, const vfs_path_t *filename_vpath)
     /*   */
1823 {
1824     int i;
1825     const char *write_name;
1826     char *write_name_quoted;
1827     char *p = NULL;
1828 
1829     i = edit_find_filter (filename_vpath);
1830     if (i < 0)
1831         return NULL;
1832 
1833     write_name = vfs_path_get_last_path_str (write_name_vpath);
1834     write_name_quoted = name_quote (write_name, FALSE);
1835     if (write_name_quoted != NULL)
1836     {
1837         p = g_strdup_printf (all_filters[i].write, write_name_quoted);
1838         g_free (write_name_quoted);
1839     }
1840     return p;
1841 }
1842 
1843 /* --------------------------------------------------------------------------------------------- */
1844 /**
1845  * @param edit   editor object
1846  * @param f      value of stream file
1847  * @return       the length of the file
1848  */
1849 
1850 off_t
1851 edit_write_stream (WEdit *edit, FILE *f)
     /*   */
1852 {
1853     long i;
1854 
1855     if (edit->lb == LB_ASIS)
1856     {
1857         for (i = 0; i < edit->buffer.size; i++)
1858             if (fputc (edit_buffer_get_byte (&edit->buffer, i), f) < 0)
1859                 break;
1860         return i;
1861     }
1862 
1863     // change line breaks
1864     for (i = 0; i < edit->buffer.size; i++)
1865     {
1866         unsigned char c;
1867 
1868         c = edit_buffer_get_byte (&edit->buffer, i);
1869         if (!(c == '\n' || c == '\r'))
1870         {
1871             // not line break
1872             if (fputc (c, f) < 0)
1873                 return i;
1874         }
1875         else
1876         {  // (c == '\n' || c == '\r')
1877             unsigned char c1;
1878 
1879             c1 = edit_buffer_get_byte (&edit->buffer, i + 1);  // next char
1880 
1881             switch (edit->lb)
1882             {
1883             case LB_UNIX:  // replace "\r\n" or '\r' to '\n'
1884                 // put one line break unconditionally
1885                 if (fputc ('\n', f) < 0)
1886                     return i;
1887 
1888                 i++;  // 2 chars are processed
1889 
1890                 if (c == '\r' && c1 == '\n')
1891                     // Windows line break; go to the next char
1892                     break;
1893 
1894                 if (c == '\r' && c1 == '\r')
1895                 {
1896                     // two Macintosh line breaks; put second line break
1897                     if (fputc ('\n', f) < 0)
1898                         return i;
1899                     break;
1900                 }
1901 
1902                 if (fputc (c1, f) < 0)
1903                     return i;
1904                 break;
1905 
1906             case LB_WIN:  // replace '\n' or '\r' to "\r\n"
1907                 // put one line break unconditionally
1908                 if (fputc ('\r', f) < 0 || fputc ('\n', f) < 0)
1909                     return i;
1910 
1911                 if (c == '\r' && c1 == '\n')
1912                     // Windows line break; go to the next char
1913                     i++;
1914                 break;
1915 
1916             case LB_MAC:  // replace "\r\n" or '\n' to '\r'
1917                 // put one line break unconditionally
1918                 if (fputc ('\r', f) < 0)
1919                     return i;
1920 
1921                 i++;  // 2 chars are processed
1922 
1923                 if (c == '\r' && c1 == '\n')
1924                     // Windows line break; go to the next char
1925                     break;
1926 
1927                 if (c == '\n' && c1 == '\n')
1928                 {
1929                     // two Windows line breaks; put second line break
1930                     if (fputc ('\r', f) < 0)
1931                         return i;
1932                     break;
1933                 }
1934 
1935                 if (fputc (c1, f) < 0)
1936                     return i;
1937                 break;
1938             case LB_ASIS:  // default without changes
1939             default:
1940                 break;
1941             }
1942         }
1943     }
1944 
1945     return edit->buffer.size;
1946 }
1947 
1948 /* --------------------------------------------------------------------------------------------- */
1949 
1950 gboolean
1951 is_break_char (char c)
     /*   */
1952 {
1953     return (isspace (c) || strchr ("{}[]()<>=|/\\!?~-+`'\",.;:#$%^&*", c) != NULL);
1954 }
1955 
1956 /* --------------------------------------------------------------------------------------------- */
1957 /** inserts a file at the cursor, returns count of inserted bytes on success */
1958 
1959 off_t
1960 edit_insert_file (WEdit *edit, const vfs_path_t *filename_vpath)
     /*   */
1961 {
1962     char *p;
1963     off_t current;
1964     off_t ins_len = 0;
1965 
1966     p = edit_get_filter (filename_vpath);
1967     current = edit->buffer.curs1;
1968 
1969     if (p != NULL)
1970     {
1971         FILE *f;
1972 
1973         f = (FILE *) popen (p, "r");
1974         if (f != NULL)
1975         {
1976             edit_insert_stream (edit, f);
1977 
1978             // Place cursor at the end of text selection
1979             if (!edit_options.cursor_after_inserted_block)
1980             {
1981                 ins_len = edit->buffer.curs1 - current;
1982                 edit_cursor_move (edit, -ins_len);
1983             }
1984             if (pclose (f) > 0)
1985             {
1986                 message (D_ERROR, MSG_ERROR, _ ("Error reading from pipe: %s"), p);
1987                 ins_len = -1;
1988             }
1989         }
1990         else
1991         {
1992             file_error_message (_ ("Cannot open pipe for reading\n%s"), p);
1993             ins_len = -1;
1994         }
1995         g_free (p);
1996     }
1997     else
1998     {
1999         int file;
2000         off_t blocklen;
2001         gboolean vertical_insertion = FALSE;
2002         char *buf;
2003 
2004         file = mc_open (filename_vpath, O_RDONLY | O_BINARY);
2005         if (file == -1)
2006             return -1;
2007 
2008         buf = g_malloc0 (TEMP_BUF_LEN);
2009         blocklen = mc_read (file, buf, sizeof (VERTICAL_MAGIC));
2010         if (blocklen > 0)
2011         {
2012             // if contain signature VERTICAL_MAGIC then it vertical block
2013             if (memcmp (buf, VERTICAL_MAGIC, sizeof (VERTICAL_MAGIC)) == 0)
2014                 vertical_insertion = TRUE;
2015             else
2016                 mc_lseek (file, 0, SEEK_SET);
2017         }
2018 
2019         if (vertical_insertion)
2020         {
2021             off_t mark1, mark2;
2022             long c1, c2;
2023 
2024             blocklen = edit_insert_column_from_file (edit, file, &mark1, &mark2, &c1, &c2);
2025             edit_set_markers (edit, edit->buffer.curs1, mark2, c1, c2);
2026 
2027             // highlight inserted text then not persistent blocks
2028             if (!edit_options.persistent_selections && edit->modified != 0)
2029             {
2030                 if (edit->column_highlight == 0)
2031                     edit_push_undo_action (edit, COLUMN_OFF);
2032                 edit->column_highlight = 1;
2033             }
2034         }
2035         else
2036         {
2037             off_t i;
2038 
2039             while ((blocklen = mc_read (file, (char *) buf, TEMP_BUF_LEN)) > 0)
2040             {
2041                 for (i = 0; i < blocklen; i++)
2042                     edit_insert (edit, buf[i]);
2043             }
2044             // highlight inserted text then not persistent blocks
2045             if (!edit_options.persistent_selections && edit->modified != 0)
2046             {
2047                 edit_set_markers (edit, edit->buffer.curs1, current, 0, 0);
2048                 if (edit->column_highlight != 0)
2049                     edit_push_undo_action (edit, COLUMN_ON);
2050                 edit->column_highlight = 0;
2051             }
2052 
2053             // Place cursor at the end of text selection
2054             if (!edit_options.cursor_after_inserted_block)
2055             {
2056                 ins_len = edit->buffer.curs1 - current;
2057                 edit_cursor_move (edit, -ins_len);
2058             }
2059         }
2060 
2061         edit->force |= REDRAW_PAGE;
2062         g_free (buf);
2063         mc_close (file);
2064         if (blocklen != 0)
2065             ins_len = 0;
2066     }
2067 
2068     return ins_len;
2069 }
2070 
2071 /* --------------------------------------------------------------------------------------------- */
2072 /**
2073  * Fill in the edit structure.  Return NULL on failure.  Pass edit as
2074  * NULL to allocate a new structure.
2075  *
2076  * If arg is NULL or arg->line_number is 0, try to restore saved position.  Otherwise put the
2077  * cursor on that line and show it in the middle of the screen.
2078  */
2079 
2080 WEdit *
2081 edit_init (WEdit *edit, const WRect *r, const edit_arg_t *arg)
     /*   */
2082 {
2083     gboolean to_free = FALSE;
2084     long line;
2085 
2086     auto_syntax = TRUE;  // Resetting to auto on every invocation
2087     edit_options.line_state_width = edit_options.line_state ? LINE_STATE_WIDTH : 0;
2088 
2089     if (edit != NULL)
2090     {
2091         int fullscreen;
2092         WRect loc_prev;
2093 
2094         // save some widget parameters
2095         fullscreen = edit->fullscreen;
2096         loc_prev = edit->loc_prev;
2097 
2098         edit_purge_widget (edit);
2099 
2100         // restore saved parameters
2101         edit->fullscreen = fullscreen;
2102         edit->loc_prev = loc_prev;
2103     }
2104     else
2105     {
2106         Widget *w;
2107 
2108         edit = g_malloc0 (sizeof (WEdit));
2109         to_free = TRUE;
2110 
2111         w = WIDGET (edit);
2112         widget_init (w, r, NULL, NULL);
2113         w->options |= WOP_SELECTABLE | WOP_TOP_SELECT | WOP_WANT_CURSOR;
2114         w->keymap = editor_map;
2115         w->ext_keymap = editor_x_map;
2116         edit->fullscreen = 1;
2117         edit_save_size (edit);
2118     }
2119 
2120     edit->drag_state = MCEDIT_DRAG_NONE;
2121 
2122     edit->stat1.st_mode = S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH;
2123     edit->stat1.st_uid = getuid ();
2124     edit->stat1.st_gid = getgid ();
2125     edit->stat1.st_mtime = 0;
2126 
2127     if (arg != NULL)
2128         edit->attrs_ok = (mc_fgetflags (arg->file_vpath, &edit->attrs) == 0);
2129     else
2130         edit->attrs_ok = FALSE;
2131 
2132     edit->over_col = 0;
2133     edit->bracket = -1;
2134     edit->last_bracket = -1;
2135     edit->force |= REDRAW_PAGE;
2136 
2137     // set file name before load file
2138     if (arg != NULL)
2139     {
2140         edit_set_filename (edit, arg->file_vpath);
2141         line = arg->line_number;
2142     }
2143     else
2144     {
2145         edit_set_filename (edit, NULL);
2146         line = 0;
2147     }
2148 
2149     edit->undo_stack_size = START_STACK_SIZE;
2150     edit->undo_stack_size_mask = START_STACK_SIZE - 1;
2151     edit->undo_stack = g_malloc0 ((edit->undo_stack_size + 10) * sizeof (long));
2152 
2153     edit->redo_stack_size = START_STACK_SIZE;
2154     edit->redo_stack_size_mask = START_STACK_SIZE - 1;
2155     edit->redo_stack = g_malloc0 ((edit->redo_stack_size + 10) * sizeof (long));
2156 
2157     edit->utf8 = FALSE;
2158     edit->converter = str_cnv_from_term;
2159     edit_set_codeset (edit);
2160 
2161     if (!edit_load_file (edit))
2162     {
2163         // edit_load_file already gives an error message
2164         if (to_free)
2165             g_free (edit);
2166         return NULL;
2167     }
2168 
2169     edit->loading_done = 1;
2170     edit->modified = 0;
2171     edit->locked = 0;
2172     edit_load_syntax (edit, NULL, NULL);
2173     edit_get_syntax_color (edit, -1);
2174 
2175     // load saved cursor position and/or boolmarks
2176     if ((line == 0) && edit_options.save_position)
2177         edit_load_position (edit, TRUE);
2178     else
2179     {
2180         edit_load_position (edit, FALSE);
2181         if (line <= 0)
2182             line = 1;
2183         edit_move_display (edit, line - 1);
2184         edit_move_to_line (edit, line - 1);
2185     }
2186 
2187     edit_load_macro_cmd (edit);
2188 
2189     return edit;
2190 }
2191 
2192 /* --------------------------------------------------------------------------------------------- */
2193 
2194 /** Clear the edit struct, freeing everything in it.  Return TRUE on success */
2195 gboolean
2196 edit_clean (WEdit *edit)
     /*   */
2197 {
2198     if (edit == NULL)
2199         return FALSE;
2200 
2201     // a stale lock, remove it
2202     if (edit->locked)
2203         edit->locked = unlock_file (edit->filename_vpath);
2204 
2205     // save cursor position
2206     if (edit_options.save_position)
2207         edit_save_position (edit);
2208     else if (edit->serialized_bookmarks != NULL)
2209         g_array_free (edit->serialized_bookmarks, TRUE);
2210 
2211     // File specified on the mcedit command line and never saved
2212     if (edit->delete_file != 0)
2213         unlink (vfs_path_get_last_path_str (edit->filename_vpath));
2214 
2215     edit_free_syntax_rules (edit);
2216     book_mark_flush (edit, -1);
2217 
2218     edit_buffer_clean (&edit->buffer);
2219 
2220     g_free (edit->undo_stack);
2221     g_free (edit->redo_stack);
2222     vfs_path_free (edit->filename_vpath, TRUE);
2223     vfs_path_free (edit->dir_vpath, TRUE);
2224     edit_search_deinit (edit);
2225 
2226     if (edit->converter != str_cnv_from_term)
2227         str_close_conv (edit->converter);
2228 
2229     edit_purge_widget (edit);
2230 
2231     return TRUE;
2232 }
2233 
2234 /* --------------------------------------------------------------------------------------------- */
2235 
2236 /**
2237  * Load a new file into the editor and set line.  If it fails, preserve the old file.
2238  * To do it, allocate a new widget, initialize it and, if the new file
2239  * was loaded, copy the data to the old widget.
2240  *
2241  * @return TRUE on success, FALSE on failure.
2242  */
2243 gboolean
2244 edit_reload_line (WEdit *edit, const edit_arg_t *arg)
     /*   */
2245 {
2246     Widget *w = WIDGET (edit);
2247     WEdit *e;
2248 
2249     e = g_malloc0 (sizeof (WEdit));
2250     *WIDGET (e) = *w;
2251     // save some widget parameters
2252     e->fullscreen = edit->fullscreen;
2253     e->loc_prev = edit->loc_prev;
2254 
2255     if (edit_init (e, &w->rect, arg) == NULL)
2256     {
2257         g_free (e);
2258         return FALSE;
2259     }
2260 
2261     edit_clean (edit);
2262     memcpy (edit, e, sizeof (*edit));
2263     g_free (e);
2264 
2265     return TRUE;
2266 }
2267 
2268 /* --------------------------------------------------------------------------------------------- */
2269 
2270 void
2271 edit_set_codeset (WEdit *edit)
     /*   */
2272 {
2273     const char *cp_id;
2274 
2275     cp_id = get_codepage_id (mc_global.source_codepage >= 0 ? mc_global.source_codepage
2276                                                             : mc_global.display_codepage);
2277 
2278     if (cp_id != NULL)
2279     {
2280         GIConv conv;
2281         conv = str_crt_conv_from (cp_id);
2282         if (conv != INVALID_CONV)
2283         {
2284             if (edit->converter != str_cnv_from_term)
2285                 str_close_conv (edit->converter);
2286             edit->converter = conv;
2287         }
2288     }
2289 
2290     if (cp_id != NULL)
2291         edit->utf8 = str_isutf8 (cp_id);
2292 }
2293 
2294 /* --------------------------------------------------------------------------------------------- */
2295 
2296 /**
2297  * Recording stack for undo:
2298  * The following is an implementation of a compressed stack. Identical
2299  * pushes are recorded by a negative prefix indicating the number of times the
2300  * same char was pushed. This saves space for repeated curs-left or curs-right
2301  * delete etc.
2302  *
2303  * eg:
2304  *
2305  * pushed:       stored:
2306  *
2307  * a
2308  * b             a
2309  * b            -3
2310  * b             b
2311  * c  -->       -4
2312  * c             c
2313  * c             d
2314  * c
2315  * d
2316  *
2317  * If the stack long int is 0-255 it represents a normal insert (from a backspace),
2318  * 256-512 is an insert ahead (from a delete), If it is between 600 and 700 it is one
2319  * of the cursor functions define'd in edit-impl.h. 1000 through 700'000'000 is to
2320  * set edit->mark1 position. 700'000'000 through 1400'000'000 is to set edit->mark2
2321  * position.
2322  *
2323  * The only way the cursor moves or the buffer is changed is through the routines:
2324  * insert, backspace, insert_ahead, delete, and cursor_move.
2325  * These record the reverse undo movements onto the stack each time they are
2326  * called.
2327  *
2328  * Each key press results in a set of actions (insert; delete ...). So each time
2329  * a key is pressed the current position of start_display is pushed as
2330  * KEY_PRESS + start_display. Then for undoing, we pop until we get to a number
2331  * over KEY_PRESS. We then assign this number less KEY_PRESS to start_display. So undo
2332  * tracks scrolling and key actions exactly. (KEY_PRESS is about (2^31) * (2/3) = 1400'000'000)
2333  *
2334  *
2335  *
2336  * @param edit editor object
2337  * @param c code of the action
2338  */
2339 
2340 void
2341 edit_push_undo_action (WEdit *edit, long c)
     /*   */
2342 {
2343     unsigned long sp = edit->undo_stack_pointer;
2344     unsigned long spm1;
2345 
2346     // first enlarge the stack if necessary
2347     if (sp > edit->undo_stack_size - 10)
2348     {  // say
2349         if (max_undo < 256)
2350             max_undo = 256;
2351         if (edit->undo_stack_size < (unsigned long) max_undo)
2352         {
2353             long *t;
2354 
2355             t = g_realloc (edit->undo_stack, (edit->undo_stack_size * 2 + 10) * sizeof (long));
2356             if (t != NULL)
2357             {
2358                 edit->undo_stack = t;
2359                 edit->undo_stack_size <<= 1;
2360                 edit->undo_stack_size_mask = edit->undo_stack_size - 1;
2361             }
2362         }
2363     }
2364     spm1 = (edit->undo_stack_pointer - 1) & edit->undo_stack_size_mask;
2365     if (edit->undo_stack_disable)
2366     {
2367         edit_push_redo_action (edit, KEY_PRESS);
2368         edit_push_redo_action (edit, c);
2369         return;
2370     }
2371 
2372     if (edit->redo_stack_reset)
2373         edit->redo_stack_bottom = edit->redo_stack_pointer = 0;
2374 
2375     if (edit->undo_stack_bottom != sp && spm1 != edit->undo_stack_bottom
2376         && ((sp - 2) & edit->undo_stack_size_mask) != edit->undo_stack_bottom)
2377     {
2378         long d;
2379 
2380         if (edit->undo_stack[spm1] < 0)
2381         {
2382             d = edit->undo_stack[(sp - 2) & edit->undo_stack_size_mask];
2383             if (d == c && edit->undo_stack[spm1] > -1000000000)
2384             {
2385                 if (c < KEY_PRESS)  // --> no need to push multiple do-nothings
2386                     edit->undo_stack[spm1]--;
2387                 return;
2388             }
2389         }
2390         else
2391         {
2392             d = edit->undo_stack[spm1];
2393             if (d == c)
2394             {
2395                 if (c >= KEY_PRESS)
2396                     return;  // --> no need to push multiple do-nothings
2397                 edit->undo_stack[sp] = -2;
2398                 goto check_bottom;
2399             }
2400         }
2401     }
2402     edit->undo_stack[sp] = c;
2403 
2404 check_bottom:
2405     edit->undo_stack_pointer = (edit->undo_stack_pointer + 1) & edit->undo_stack_size_mask;
2406 
2407     /* if the sp wraps round and catches the undo_stack_bottom then erase
2408      * the first set of actions on the stack to make space - by moving
2409      * undo_stack_bottom forward one "key press" */
2410     c = (edit->undo_stack_pointer + 2) & edit->undo_stack_size_mask;
2411     if ((unsigned long) c == edit->undo_stack_bottom
2412         || (((unsigned long) c + 1) & edit->undo_stack_size_mask) == edit->undo_stack_bottom)
2413         do
2414         {
2415             edit->undo_stack_bottom = (edit->undo_stack_bottom + 1) & edit->undo_stack_size_mask;
2416         }
2417         while (edit->undo_stack[edit->undo_stack_bottom] < KEY_PRESS
2418                && edit->undo_stack_bottom != edit->undo_stack_pointer);
2419 
2420     // If a single key produced enough pushes to wrap all the way round then we would notice that
2421     // the [undo_stack_bottom] does not contain KEY_PRESS. The stack is then initialised:
2422     if (edit->undo_stack_pointer != edit->undo_stack_bottom
2423         && edit->undo_stack[edit->undo_stack_bottom] < KEY_PRESS)
2424     {
2425         edit->undo_stack_bottom = edit->undo_stack_pointer = 0;
2426     }
2427 }
2428 
2429 /* --------------------------------------------------------------------------------------------- */
2430 
2431 void
2432 edit_push_redo_action (WEdit *edit, long c)
     /*   */
2433 {
2434     unsigned long sp = edit->redo_stack_pointer;
2435     unsigned long spm1;
2436     // first enlarge the stack if necessary
2437     if (sp > edit->redo_stack_size - 10)
2438     {  // say
2439         if (max_undo < 256)
2440             max_undo = 256;
2441         if (edit->redo_stack_size < (unsigned long) max_undo)
2442         {
2443             long *t;
2444 
2445             t = g_realloc (edit->redo_stack, (edit->redo_stack_size * 2 + 10) * sizeof (long));
2446             if (t != NULL)
2447             {
2448                 edit->redo_stack = t;
2449                 edit->redo_stack_size <<= 1;
2450                 edit->redo_stack_size_mask = edit->redo_stack_size - 1;
2451             }
2452         }
2453     }
2454     spm1 = (edit->redo_stack_pointer - 1) & edit->redo_stack_size_mask;
2455 
2456     if (edit->redo_stack_bottom != sp && spm1 != edit->redo_stack_bottom
2457         && ((sp - 2) & edit->redo_stack_size_mask) != edit->redo_stack_bottom)
2458     {
2459         long d;
2460 
2461         if (edit->redo_stack[spm1] < 0)
2462         {
2463             d = edit->redo_stack[(sp - 2) & edit->redo_stack_size_mask];
2464             if (d == c && edit->redo_stack[spm1] > -1000000000)
2465             {
2466                 if (c < KEY_PRESS)  // --> no need to push multiple do-nothings
2467                     edit->redo_stack[spm1]--;
2468                 return;
2469             }
2470         }
2471         else
2472         {
2473             d = edit->redo_stack[spm1];
2474             if (d == c)
2475             {
2476                 if (c >= KEY_PRESS)
2477                     return;  // --> no need to push multiple do-nothings
2478                 edit->redo_stack[sp] = -2;
2479                 goto redo_check_bottom;
2480             }
2481         }
2482     }
2483     edit->redo_stack[sp] = c;
2484 
2485 redo_check_bottom:
2486     edit->redo_stack_pointer = (edit->redo_stack_pointer + 1) & edit->redo_stack_size_mask;
2487 
2488     /* if the sp wraps round and catches the redo_stack_bottom then erase
2489      * the first set of actions on the stack to make space - by moving
2490      * redo_stack_bottom forward one "key press" */
2491     c = (edit->redo_stack_pointer + 2) & edit->redo_stack_size_mask;
2492     if ((unsigned long) c == edit->redo_stack_bottom
2493         || (((unsigned long) c + 1) & edit->redo_stack_size_mask) == edit->redo_stack_bottom)
2494         do
2495         {
2496             edit->redo_stack_bottom = (edit->redo_stack_bottom + 1) & edit->redo_stack_size_mask;
2497         }
2498         while (edit->redo_stack[edit->redo_stack_bottom] < KEY_PRESS
2499                && edit->redo_stack_bottom != edit->redo_stack_pointer);
2500 
2501     /*
2502      * If a single key produced enough pushes to wrap all the way round then
2503      * we would notice that the [redo_stack_bottom] does not contain KEY_PRESS.
2504      * The stack is then initialised:
2505      */
2506 
2507     if (edit->redo_stack_pointer != edit->redo_stack_bottom
2508         && edit->redo_stack[edit->redo_stack_bottom] < KEY_PRESS)
2509         edit->redo_stack_bottom = edit->redo_stack_pointer = 0;
2510 }
2511 
2512 /* --------------------------------------------------------------------------------------------- */
2513 /**
2514    Basic low level single character buffer alterations and movements at the cursor.
2515  */
2516 
2517 void
2518 edit_insert (WEdit *edit, int c)
     /*   */
2519 {
2520     // first we must update the position of the display window
2521     if (edit->buffer.curs1 < edit->start_display)
2522     {
2523         edit->start_display++;
2524         if (c == '\n')
2525             edit->start_line++;
2526     }
2527 
2528     // Mark file as modified, unless the file hasn't been fully loaded
2529     if (edit->loading_done != 0)
2530         edit_modification (edit);
2531 
2532     // now we must update some info on the file and check if a redraw is required
2533     if (c == '\n')
2534     {
2535         book_mark_inc (edit, edit->buffer.curs_line);
2536         edit->buffer.curs_line++;
2537         edit->buffer.lines++;
2538         edit->force |= REDRAW_LINE_ABOVE | REDRAW_AFTER_CURSOR;
2539     }
2540 
2541     // save the reverse command onto the undo stack
2542     // ordinary char and not space
2543     if (c > 32)
2544         edit_push_undo_action (edit, BACKSPACE);
2545     else
2546         edit_push_undo_action (edit, BACKSPACE_BR);
2547     // update markers
2548     edit->mark1 += (edit->mark1 > edit->buffer.curs1) ? 1 : 0;
2549     edit->mark2 += (edit->mark2 > edit->buffer.curs1) ? 1 : 0;
2550     edit->last_get_rule += (edit->last_get_rule > edit->buffer.curs1) ? 1 : 0;
2551 
2552     edit_buffer_insert (&edit->buffer, c);
2553 }
2554 
2555 /* --------------------------------------------------------------------------------------------- */
2556 /** same as edit_insert and move left */
2557 
2558 void
2559 edit_insert_ahead (WEdit *edit, int c)
     /*   */
2560 {
2561     if (edit->buffer.curs1 < edit->start_display)
2562     {
2563         edit->start_display++;
2564         if (c == '\n')
2565             edit->start_line++;
2566     }
2567     edit_modification (edit);
2568     if (c == '\n')
2569     {
2570         book_mark_inc (edit, edit->buffer.curs_line);
2571         edit->buffer.lines++;
2572         edit->force |= REDRAW_AFTER_CURSOR;
2573     }
2574     // ordinary char and not space
2575     if (c > 32)
2576         edit_push_undo_action (edit, DELCHAR);
2577     else
2578         edit_push_undo_action (edit, DELCHAR_BR);
2579 
2580     edit->mark1 += (edit->mark1 >= edit->buffer.curs1) ? 1 : 0;
2581     edit->mark2 += (edit->mark2 >= edit->buffer.curs1) ? 1 : 0;
2582     edit->last_get_rule += (edit->last_get_rule >= edit->buffer.curs1) ? 1 : 0;
2583 
2584     edit_buffer_insert_ahead (&edit->buffer, c);
2585 }
2586 
2587 /* --------------------------------------------------------------------------------------------- */
2588 
2589 void
2590 edit_insert_over (WEdit *edit)
     /*   */
2591 {
2592     long i;
2593 
2594     for (i = 0; i < edit->over_col; i++)
2595         edit_insert (edit, ' ');
2596 
2597     edit->over_col = 0;
2598 }
2599 
2600 /* --------------------------------------------------------------------------------------------- */
2601 
2602 int
2603 edit_delete (WEdit *edit, gboolean byte_delete)
     /*   */
2604 {
2605     int p = 0;
2606     int char_length = 1;
2607     int i;
2608 
2609     if (edit->buffer.curs2 == 0)
2610         return 0;
2611 
2612     // if byte_delete == TRUE then delete only one byte not multibyte char
2613     if (edit->utf8 && !byte_delete)
2614     {
2615         edit_buffer_get_utf (&edit->buffer, edit->buffer.curs1, &char_length);
2616         if (char_length < 1)
2617             char_length = 1;
2618     }
2619 
2620     if (edit->mark2 != edit->mark1)
2621         edit_push_markers (edit);
2622 
2623     for (i = 1; i <= char_length; i++)
2624     {
2625         if (edit->mark1 > edit->buffer.curs1)
2626         {
2627             edit->mark1--;
2628             edit->end_mark_curs--;
2629         }
2630         if (edit->mark2 > edit->buffer.curs1)
2631             edit->mark2--;
2632         if (edit->last_get_rule > edit->buffer.curs1)
2633             edit->last_get_rule--;
2634 
2635         p = edit_buffer_delete (&edit->buffer);
2636 
2637         edit_push_undo_action (edit, p + 256);
2638     }
2639 
2640     edit_modification (edit);
2641     if (p == '\n')
2642     {
2643         book_mark_dec (edit, edit->buffer.curs_line);
2644         edit->buffer.lines--;
2645         edit->force |= REDRAW_AFTER_CURSOR;
2646     }
2647     if (edit->buffer.curs1 < edit->start_display)
2648     {
2649         edit->start_display--;
2650         if (p == '\n')
2651             edit->start_line--;
2652     }
2653 
2654     return p;
2655 }
2656 
2657 /* --------------------------------------------------------------------------------------------- */
2658 
2659 int
2660 edit_backspace (WEdit *edit, gboolean byte_delete)
     /*   */
2661 {
2662     int p = 0;
2663     int char_length = 1;
2664     int i;
2665 
2666     if (edit->buffer.curs1 == 0)
2667         return 0;
2668 
2669     if (edit->mark2 != edit->mark1)
2670         edit_push_markers (edit);
2671 
2672     if (edit->utf8 && !byte_delete)
2673     {
2674         edit_buffer_get_prev_utf (&edit->buffer, edit->buffer.curs1, &char_length);
2675         if (char_length < 1)
2676             char_length = 1;
2677     }
2678 
2679     for (i = 1; i <= char_length; i++)
2680     {
2681         if (edit->mark1 >= edit->buffer.curs1)
2682         {
2683             edit->mark1--;
2684             edit->end_mark_curs--;
2685         }
2686         if (edit->mark2 >= edit->buffer.curs1)
2687             edit->mark2--;
2688         if (edit->last_get_rule >= edit->buffer.curs1)
2689             edit->last_get_rule--;
2690 
2691         p = edit_buffer_backspace (&edit->buffer);
2692 
2693         edit_push_undo_action (edit, p);
2694     }
2695     edit_modification (edit);
2696     if (p == '\n')
2697     {
2698         book_mark_dec (edit, edit->buffer.curs_line);
2699         edit->buffer.curs_line--;
2700         edit->buffer.lines--;
2701         edit->force |= REDRAW_AFTER_CURSOR;
2702     }
2703 
2704     if (edit->buffer.curs1 < edit->start_display)
2705     {
2706         edit->start_display--;
2707         if (p == '\n')
2708             edit->start_line--;
2709     }
2710 
2711     return p;
2712 }
2713 
2714 /* --------------------------------------------------------------------------------------------- */
2715 /** moves the cursor right or left: increment positive or negative respectively */
2716 
2717 void
2718 edit_cursor_move (WEdit *edit, off_t increment)
     /*   */
2719 {
2720     if (increment < 0)
2721     {
2722         for (; increment < 0 && edit->buffer.curs1 != 0; increment++)
2723         {
2724             int c;
2725 
2726             edit_push_undo_action (edit, CURS_RIGHT);
2727 
2728             c = edit_buffer_get_previous_byte (&edit->buffer);
2729             edit_buffer_insert_ahead (&edit->buffer, c);
2730             c = edit_buffer_backspace (&edit->buffer);
2731             if (c == '\n')
2732             {
2733                 edit->buffer.curs_line--;
2734                 edit->force |= REDRAW_LINE_BELOW;
2735             }
2736         }
2737     }
2738     else
2739     {
2740         for (; increment > 0 && edit->buffer.curs2 != 0; increment--)
2741         {
2742             int c;
2743 
2744             edit_push_undo_action (edit, CURS_LEFT);
2745 
2746             c = edit_buffer_get_current_byte (&edit->buffer);
2747             edit_buffer_insert (&edit->buffer, c);
2748             c = edit_buffer_delete (&edit->buffer);
2749             if (c == '\n')
2750             {
2751                 edit->buffer.curs_line++;
2752                 edit->force |= REDRAW_LINE_ABOVE;
2753             }
2754         }
2755     }
2756 }
2757 
2758 /* --------------------------------------------------------------------------------------------- */
2759 /* If cols is zero this returns the count of columns from current to upto. */
2760 /* If upto is zero returns index of cols across from current. */
2761 
2762 off_t
2763 edit_move_forward3 (const WEdit *edit, off_t current, long cols, off_t upto)
     /*   */
2764 {
2765     off_t p, q;
2766     long col;
2767 
2768     if (upto != 0)
2769     {
2770         q = upto;
2771         cols = -10;
2772     }
2773     else
2774         q = edit->buffer.size + 2;
2775 
2776     for (col = 0, p = current; p < q; p++)
2777     {
2778         int c, orig_c;
2779 
2780         if (cols != -10)
2781         {
2782             if (col == cols)
2783                 return p;
2784             if (col > cols)
2785                 return p - 1;
2786         }
2787 
2788         orig_c = c = edit_buffer_get_byte (&edit->buffer, p);
2789 
2790         if (edit->utf8)
2791         {
2792             int utf_ch;
2793             int char_length = 1;
2794 
2795             utf_ch = edit_buffer_get_utf (&edit->buffer, p, &char_length);
2796             if (mc_global.utf8_display)
2797             {
2798                 if (char_length > 1)
2799                     col -= char_length - 1;
2800                 if (g_unichar_iswide (utf_ch))
2801                     col++;
2802             }
2803             else if (char_length > 1 && g_unichar_isprint (utf_ch))
2804                 col -= char_length - 1;
2805         }
2806 
2807         c = convert_to_display_c (c);
2808 
2809         if (c == '\n')
2810             return (upto != 0 ? (off_t) col : p);
2811         if (c == '\t')
2812             col += TAB_SIZE - col % TAB_SIZE;
2813         else if ((c < 32 || c == 127) && (orig_c == c || (!mc_global.utf8_display && !edit->utf8)))
2814             // '\r' is shown as ^M, so we must advance 2 characters
2815             // Caret notation for control characters
2816             col += 2;
2817         else
2818             col++;
2819     }
2820     return (off_t) col;
2821 }
2822 
2823 /* --------------------------------------------------------------------------------------------- */
2824 /** returns the current offset of the cursor from the beginning of a file */
2825 
2826 off_t
2827 edit_get_cursor_offset (const WEdit *edit)
     /*   */
2828 {
2829     return edit->buffer.curs1;
2830 }
2831 
2832 /* --------------------------------------------------------------------------------------------- */
2833 /** returns the current column position of the cursor */
2834 
2835 long
2836 edit_get_col (const WEdit *edit)
     /*   */
2837 {
2838     off_t b;
2839 
2840     b = edit_buffer_get_current_bol (&edit->buffer);
2841     return (long) edit_move_forward3 (edit, b, 0, edit->buffer.curs1);
2842 }
2843 
2844 /* --------------------------------------------------------------------------------------------- */
2845 /* Scrolling functions */
2846 /* --------------------------------------------------------------------------------------------- */
2847 
2848 void
2849 edit_update_curs_row (WEdit *edit)
     /*   */
2850 {
2851     edit->curs_row = edit->buffer.curs_line - edit->start_line;
2852 }
2853 
2854 /* --------------------------------------------------------------------------------------------- */
2855 
2856 void
2857 edit_update_curs_col (WEdit *edit)
     /*   */
2858 {
2859     off_t b;
2860 
2861     b = edit_buffer_get_current_bol (&edit->buffer);
2862     edit->curs_col = (long) edit_move_forward3 (edit, b, 0, edit->buffer.curs1);
2863 }
2864 
2865 /* --------------------------------------------------------------------------------------------- */
2866 
2867 long
2868 edit_get_curs_col (const WEdit *edit)
     /*   */
2869 {
2870     return edit->curs_col;
2871 }
2872 
2873 /* --------------------------------------------------------------------------------------------- */
2874 /** moves the display start position up by i lines */
2875 
2876 void
2877 edit_scroll_upward (WEdit *edit, long i)
     /*   */
2878 {
2879     long lines_above = edit->start_line;
2880 
2881     if (i > lines_above)
2882         i = lines_above;
2883     if (i != 0)
2884     {
2885         edit->start_line -= i;
2886         edit->start_display =
2887             edit_buffer_get_backward_offset (&edit->buffer, edit->start_display, i);
2888         edit->force |= REDRAW_PAGE;
2889         edit->force &= (0xfff - REDRAW_CHAR_ONLY);
2890     }
2891     edit_update_curs_row (edit);
2892 }
2893 
2894 /* --------------------------------------------------------------------------------------------- */
2895 
2896 void
2897 edit_scroll_downward (WEdit *edit, long i)
     /*   */
2898 {
2899     long lines_below;
2900 
2901     lines_below = edit->buffer.lines - edit->start_line - (WIDGET (edit)->rect.lines - 1);
2902     if (lines_below > 0)
2903     {
2904         if (i > lines_below)
2905             i = lines_below;
2906         edit->start_line += i;
2907         edit->start_display =
2908             edit_buffer_get_forward_offset (&edit->buffer, edit->start_display, i, 0);
2909         edit->force |= REDRAW_PAGE;
2910         edit->force &= (0xfff - REDRAW_CHAR_ONLY);
2911     }
2912     edit_update_curs_row (edit);
2913 }
2914 
2915 /* --------------------------------------------------------------------------------------------- */
2916 
2917 void
2918 edit_scroll_right (WEdit *edit, long i)
     /*   */
2919 {
2920     edit->force |= REDRAW_PAGE;
2921     edit->force &= (0xfff - REDRAW_CHAR_ONLY);
2922     edit->start_col -= i;
2923 }
2924 
2925 /* --------------------------------------------------------------------------------------------- */
2926 
2927 void
2928 edit_scroll_left (WEdit *edit, long i)
     /*   */
2929 {
2930     if (edit->start_col)
2931     {
2932         edit->start_col += i;
2933         if (edit->start_col > 0)
2934             edit->start_col = 0;
2935         edit->force |= REDRAW_PAGE;
2936         edit->force &= (0xfff - REDRAW_CHAR_ONLY);
2937     }
2938 }
2939 
2940 /* --------------------------------------------------------------------------------------------- */
2941 /* high level cursor movement commands */
2942 /* --------------------------------------------------------------------------------------------- */
2943 
2944 void
2945 edit_move_to_prev_col (WEdit *edit, off_t p)
     /*   */
2946 {
2947     long prev = edit->prev_col;
2948     long over = edit->over_col;
2949     off_t b;
2950 
2951     edit_cursor_move (edit,
2952                       edit_move_forward3 (edit, p, prev + edit->over_col, 0) - edit->buffer.curs1);
2953 
2954     if (edit_options.cursor_beyond_eol)
2955     {
2956         off_t e;
2957         long line_len;
2958 
2959         b = edit_buffer_get_current_bol (&edit->buffer);
2960         e = edit_buffer_get_current_eol (&edit->buffer);
2961         line_len = (long) edit_move_forward3 (edit, b, 0, e);
2962         if (line_len < prev + edit->over_col)
2963         {
2964             edit->over_col = prev + over - line_len;
2965             edit->prev_col = line_len;
2966             edit->curs_col = line_len;
2967         }
2968         else
2969         {
2970             edit->curs_col = prev + over;
2971             edit->prev_col = edit->curs_col;
2972             edit->over_col = 0;
2973         }
2974     }
2975     else
2976     {
2977         edit->over_col = 0;
2978         if (edit_options.fake_half_tabs && is_in_indent (&edit->buffer))
2979         {
2980             long fake_half_tabs;
2981 
2982             edit_update_curs_col (edit);
2983 
2984             fake_half_tabs = HALF_TAB_SIZE * space_width;
2985             if (fake_half_tabs != 0 && edit->curs_col % fake_half_tabs != 0)
2986             {
2987                 long q;
2988 
2989                 q = edit->curs_col;
2990                 edit->curs_col -= (edit->curs_col % fake_half_tabs);
2991                 p = edit_buffer_get_current_bol (&edit->buffer);
2992                 b = edit_move_forward3 (edit, p, edit->curs_col, 0);
2993                 edit_cursor_move (edit, b - edit->buffer.curs1);
2994                 if (!left_of_four_spaces (edit))
2995                 {
2996                     b = edit_move_forward3 (edit, p, q, 0);
2997                     edit_cursor_move (edit, b - edit->buffer.curs1);
2998                 }
2999             }
3000         }
3001     }
3002 }
3003 
3004 /* --------------------------------------------------------------------------------------------- */
3005 /** check whether line in editor is blank or not
3006  *
3007  * @param edit editor object
3008  * @param line number of line
3009  *
3010  * @return TRUE if line in blank, FALSE otherwise
3011  */
3012 
3013 gboolean
3014 edit_line_is_blank (WEdit *edit, long line)
     /*   */
3015 {
3016     return is_blank (&edit->buffer, edit_find_line (edit, line));
3017 }
3018 
3019 /* --------------------------------------------------------------------------------------------- */
3020 /** move cursor to line 'line' */
3021 
3022 void
3023 edit_move_to_line (WEdit *e, long line)
     /*   */
3024 {
3025     if (line < e->buffer.curs_line)
3026         edit_move_up (e, e->buffer.curs_line - line, FALSE);
3027     else
3028         edit_move_down (e, line - e->buffer.curs_line, FALSE);
3029     edit_scroll_screen_over_cursor (e);
3030 }
3031 
3032 /* --------------------------------------------------------------------------------------------- */
3033 /** scroll window so that first visible line is 'line' */
3034 
3035 void
3036 edit_move_display (WEdit *e, long line)
     /*   */
3037 {
3038     if (line < e->start_line)
3039         edit_scroll_upward (e, e->start_line - line);
3040     else
3041         edit_scroll_downward (e, line - e->start_line);
3042 }
3043 
3044 /* --------------------------------------------------------------------------------------------- */
3045 /** save markers onto undo stack */
3046 
3047 void
3048 edit_push_markers (WEdit *edit)
     /*   */
3049 {
3050     edit_push_undo_action (edit, MARK_1 + edit->mark1);
3051     edit_push_undo_action (edit, MARK_2 + edit->mark2);
3052     edit_push_undo_action (edit, MARK_CURS + edit->end_mark_curs);
3053 }
3054 
3055 /* --------------------------------------------------------------------------------------------- */
3056 
3057 void
3058 edit_set_markers (WEdit *edit, off_t m1, off_t m2, long c1, long c2)
     /*   */
3059 {
3060     edit->mark1 = m1;
3061     edit->mark2 = m2;
3062     edit->column1 = c1;
3063     edit->column2 = c2;
3064 }
3065 
3066 /* --------------------------------------------------------------------------------------------- */
3067 /**
3068    if mark2 is -1 then marking is from mark1 to the cursor.
3069    Otherwise its between the markers. This handles this.
3070    Returns FALSE if no text is marked.
3071  */
3072 
3073 gboolean
3074 eval_marks (WEdit *edit, off_t *start_mark, off_t *end_mark)
     /*   */
3075 {
3076     long end_mark_curs;
3077 
3078     if (edit->mark1 == edit->mark2)
3079     {
3080         *start_mark = *end_mark = 0;
3081         edit->column2 = edit->column1 = 0;
3082         return FALSE;
3083     }
3084 
3085     if (edit->end_mark_curs < 0)
3086         end_mark_curs = edit->buffer.curs1;
3087     else
3088         end_mark_curs = edit->end_mark_curs;
3089 
3090     if (edit->mark2 >= 0)
3091     {
3092         *start_mark = MIN (edit->mark1, edit->mark2);
3093         *end_mark = MAX (edit->mark1, edit->mark2);
3094     }
3095     else
3096     {
3097         *start_mark = MIN (edit->mark1, end_mark_curs);
3098         *end_mark = MAX (edit->mark1, end_mark_curs);
3099         edit->column2 = edit->curs_col + edit->over_col;
3100     }
3101 
3102     if (edit->column_highlight != 0
3103         && ((edit->mark1 > end_mark_curs && edit->column1 < edit->column2)
3104             || (edit->mark1 < end_mark_curs && edit->column1 > edit->column2)))
3105     {
3106         off_t start_bol, start_eol;
3107         off_t end_bol, end_eol;
3108         long col1, col2;
3109         off_t diff1, diff2;
3110 
3111         start_bol = edit_buffer_get_bol (&edit->buffer, *start_mark);
3112         start_eol = edit_buffer_get_eol (&edit->buffer, start_bol - 1) + 1;
3113         end_bol = edit_buffer_get_bol (&edit->buffer, *end_mark);
3114         end_eol = edit_buffer_get_eol (&edit->buffer, *end_mark);
3115         col1 = MIN (edit->column1, edit->column2);
3116         col2 = MAX (edit->column1, edit->column2);
3117 
3118         diff1 = edit_move_forward3 (edit, start_bol, col2, 0)
3119             - edit_move_forward3 (edit, start_bol, col1, 0);
3120         diff2 = edit_move_forward3 (edit, end_bol, col2, 0)
3121             - edit_move_forward3 (edit, end_bol, col1, 0);
3122 
3123         *start_mark -= diff1;
3124         *end_mark += diff2;
3125         *start_mark = MAX (*start_mark, start_eol);
3126         *end_mark = MIN (*end_mark, end_eol);
3127     }
3128 
3129     return TRUE;
3130 }
3131 
3132 /* --------------------------------------------------------------------------------------------- */
3133 /** highlight marker toggle */
3134 
3135 void
3136 edit_mark_cmd (WEdit *edit, gboolean unmark)
     /*   */
3137 {
3138     edit_push_markers (edit);
3139     if (unmark)
3140     {
3141         edit_set_markers (edit, 0, 0, 0, 0);
3142         edit->force |= REDRAW_PAGE;
3143     }
3144     else if (edit->mark2 >= 0)
3145     {
3146         edit->end_mark_curs = -1;
3147         edit_set_markers (edit, edit->buffer.curs1, -1, edit->curs_col + edit->over_col,
3148                           edit->curs_col + edit->over_col);
3149         edit->force |= REDRAW_PAGE;
3150     }
3151     else
3152     {
3153         edit->end_mark_curs = edit->buffer.curs1;
3154         edit_set_markers (edit, edit->mark1, edit->buffer.curs1, edit->column1,
3155                           edit->curs_col + edit->over_col);
3156     }
3157 }
3158 
3159 /* --------------------------------------------------------------------------------------------- */
3160 /** highlight the word under cursor */
3161 
3162 void
3163 edit_mark_current_word_cmd (WEdit *edit)
     /*   */
3164 {
3165     long pos;
3166 
3167     for (pos = edit->buffer.curs1; pos != 0; pos--)
3168     {
3169         int c1, c2;
3170 
3171         c1 = edit_buffer_get_byte (&edit->buffer, pos);
3172         c2 = edit_buffer_get_byte (&edit->buffer, pos - 1);
3173         if (!isspace (c1) && isspace (c2))
3174             break;
3175         if ((my_type_of (c1) & my_type_of (c2)) == 0)
3176             break;
3177     }
3178     edit->mark1 = pos;
3179 
3180     for (; pos < edit->buffer.size; pos++)
3181     {
3182         int c1, c2;
3183 
3184         c1 = edit_buffer_get_byte (&edit->buffer, pos);
3185         c2 = edit_buffer_get_byte (&edit->buffer, pos + 1);
3186         if (!isspace (c1) && isspace (c2))
3187             break;
3188         if ((my_type_of (c1) & my_type_of (c2)) == 0)
3189             break;
3190     }
3191     edit->mark2 = MIN (pos + 1, edit->buffer.size);
3192 
3193     edit->force |= REDRAW_LINE_ABOVE | REDRAW_AFTER_CURSOR;
3194 }
3195 
3196 /* --------------------------------------------------------------------------------------------- */
3197 
3198 void
3199 edit_mark_current_line_cmd (WEdit *edit)
     /*   */
3200 {
3201     edit->mark1 = edit_buffer_get_current_bol (&edit->buffer);
3202     edit->mark2 = edit_buffer_get_current_eol (&edit->buffer);
3203 
3204     edit->force |= REDRAW_LINE_ABOVE | REDRAW_AFTER_CURSOR;
3205 }
3206 
3207 /* --------------------------------------------------------------------------------------------- */
3208 
3209 void
3210 edit_delete_line (WEdit *edit)
     /*   */
3211 {
3212     /*
3213      * Delete right part of the line.
3214      * Note that edit_buffer_get_byte() returns '\n' when byte position is
3215      *   beyond EOF.
3216      */
3217     while (edit_buffer_get_current_byte (&edit->buffer) != '\n')
3218         (void) edit_delete (edit, TRUE);
3219 
3220     /*
3221      * Delete '\n' char.
3222      * Note that edit_delete() will not corrupt anything if called while
3223      *   cursor position is EOF.
3224      */
3225     (void) edit_delete (edit, TRUE);
3226 
3227     /*
3228      * Delete left part of the line.
3229      * Note, that edit_buffer_get_byte() returns '\n' when byte position is < 0.
3230      */
3231     while (edit_buffer_get_previous_byte (&edit->buffer) != '\n')
3232         (void) edit_backspace (edit, TRUE);
3233 }
3234 
3235 /* --------------------------------------------------------------------------------------------- */
3236 
3237 void
3238 edit_push_key_press (WEdit *edit)
     /*   */
3239 {
3240     edit_push_undo_action (edit, KEY_PRESS + edit->start_display);
3241     if (edit->mark2 == -1)
3242     {
3243         edit_push_undo_action (edit, MARK_1 + edit->mark1);
3244         edit_push_undo_action (edit, MARK_CURS + edit->end_mark_curs);
3245     }
3246 }
3247 
3248 /* --------------------------------------------------------------------------------------------- */
3249 
3250 void
3251 edit_find_bracket (WEdit *edit)
     /*   */
3252 {
3253     edit->bracket = edit_get_bracket (edit, 1, 10000);
3254     if (edit->last_bracket != edit->bracket)
3255         edit->force |= REDRAW_PAGE;
3256     edit->last_bracket = edit->bracket;
3257 }
3258 
3259 /* --------------------------------------------------------------------------------------------- */
3260 /**
3261  * This executes a command as though the user initiated it through a key
3262  * press.  Callback with MSG_KEY as a message calls this after
3263  * translating the key press.  This function can be used to pass any
3264  * command to the editor.  Note that the screen wouldn't update
3265  * automatically.  Either of command or char_for_insertion must be
3266  * passed as -1.  Commands are executed, and char_for_insertion is
3267  * inserted at the cursor.
3268  */
3269 
3270 void
3271 edit_execute_key_command (WEdit *edit, long command, int char_for_insertion)
     /*   */
3272 {
3273     if (command == CK_MacroStartRecord || command == CK_RepeatStartRecord
3274         || (macro_index < 0
3275             && (command == CK_MacroStartStopRecord || command == CK_RepeatStartStopRecord)))
3276     {
3277         macro_index = 0;
3278         edit->force |= REDRAW_CHAR_ONLY | REDRAW_LINE;
3279         return;
3280     }
3281     if (macro_index != -1)
3282     {
3283         edit->force |= REDRAW_COMPLETELY;
3284         if (command == CK_MacroStopRecord || command == CK_MacroStartStopRecord)
3285         {
3286             edit_store_macro_cmd (edit);
3287             macro_index = -1;
3288             return;
3289         }
3290         if (command == CK_RepeatStopRecord || command == CK_RepeatStartStopRecord)
3291         {
3292             edit_repeat_macro_cmd (edit);
3293             macro_index = -1;
3294             return;
3295         }
3296     }
3297 
3298     if (macro_index >= 0 && macro_index < MAX_MACRO_LENGTH - 1)
3299     {
3300         record_macro_buf[macro_index].action = command;
3301         record_macro_buf[macro_index++].ch = char_for_insertion;
3302     }
3303     // record the beginning of a set of editing actions initiated by a key press
3304     if (command != CK_Undo && command != CK_ExtendedKeyMap)
3305         edit_push_key_press (edit);
3306 
3307     edit_execute_cmd (edit, command, char_for_insertion);
3308     if (edit->column_highlight != 0)
3309         edit->force |= REDRAW_PAGE;
3310 }
3311 
3312 /* --------------------------------------------------------------------------------------------- */
3313 /**
3314    This executes a command at a lower level than macro recording.
3315    It also does not push a key_press onto the undo stack. This means
3316    that if it is called many times, a single undo command will undo
3317    all of them. It also does not check for the Undo command.
3318  */
3319 void
3320 edit_execute_cmd (WEdit *edit, long command, int char_for_insertion)
     /*   */
3321 {
3322     WRect *w = &WIDGET (edit)->rect;
3323 
3324     if (command == CK_WindowFullscreen)
3325     {
3326         edit_toggle_fullscreen (edit);
3327         return;
3328     }
3329 
3330     // handle window state
3331     if (edit_handle_move_resize (edit, command))
3332         return;
3333 
3334     edit->force |= REDRAW_LINE;
3335 
3336     /* The next key press will unhighlight the found string, so update
3337      * the whole page */
3338     if (edit->found_len != 0 || edit->column_highlight != 0)
3339         edit->force |= REDRAW_PAGE;
3340 
3341     switch (command)
3342     {
3343         // a mark command with shift-arrow
3344     case CK_MarkLeft:
3345     case CK_MarkRight:
3346     case CK_MarkToWordBegin:
3347     case CK_MarkToWordEnd:
3348     case CK_MarkToHome:
3349     case CK_MarkToEnd:
3350     case CK_MarkUp:
3351     case CK_MarkDown:
3352     case CK_MarkPageUp:
3353     case CK_MarkPageDown:
3354     case CK_MarkToFileBegin:
3355     case CK_MarkToFileEnd:
3356     case CK_MarkToPageBegin:
3357     case CK_MarkToPageEnd:
3358     case CK_MarkScrollUp:
3359     case CK_MarkScrollDown:
3360     case CK_MarkParagraphUp:
3361     case CK_MarkParagraphDown:
3362         // a mark command with alt-arrow
3363     case CK_MarkColumnPageUp:
3364     case CK_MarkColumnPageDown:
3365     case CK_MarkColumnLeft:
3366     case CK_MarkColumnRight:
3367     case CK_MarkColumnUp:
3368     case CK_MarkColumnDown:
3369     case CK_MarkColumnScrollUp:
3370     case CK_MarkColumnScrollDown:
3371     case CK_MarkColumnParagraphUp:
3372     case CK_MarkColumnParagraphDown:
3373         edit->column_highlight = 0;
3374         if (edit->highlight == 0 || (edit->mark2 != -1 && edit->mark1 != edit->mark2))
3375         {
3376             edit_mark_cmd (edit, TRUE);   // clear
3377             edit_mark_cmd (edit, FALSE);  // marking on
3378         }
3379         edit->highlight = 1;
3380         break;
3381 
3382         // any other command
3383     default:
3384         if (edit->highlight != 0)
3385             edit_mark_cmd (edit, FALSE);  // clear
3386         edit->highlight = 0;
3387     }
3388 
3389     // first check for undo
3390     if (command == CK_Undo)
3391     {
3392         edit->redo_stack_reset = 0;
3393         edit_group_undo (edit);
3394         edit->found_len = 0;
3395         edit->prev_col = edit_get_col (edit);
3396         edit->search_start = edit->buffer.curs1;
3397         return;
3398     }
3399     //  check for redo
3400     if (command == CK_Redo)
3401     {
3402         edit->redo_stack_reset = 0;
3403         edit_do_redo (edit);
3404         edit->found_len = 0;
3405         edit->prev_col = edit_get_col (edit);
3406         edit->search_start = edit->buffer.curs1;
3407         return;
3408     }
3409 
3410     edit->redo_stack_reset = 1;
3411 
3412     // An ordinary key press
3413     if (char_for_insertion >= 0)
3414     {
3415         // if non persistent selection and text selected
3416         if (!edit_options.persistent_selections && edit->mark1 != edit->mark2)
3417             edit_block_delete_cmd (edit);
3418 
3419         if (edit->overwrite != 0)
3420         {
3421             // remove char only one time, after input first byte, multibyte chars
3422             if (!mc_global.utf8_display || edit->charpoint == 0)
3423                 if (edit_buffer_get_current_byte (&edit->buffer) != '\n')
3424                     edit_delete (edit, FALSE);
3425         }
3426         if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3427             edit_insert_over (edit);
3428         /**
3429            Encode 8-bit input as UTF-8, if display (locale) is *not* UTF-8,
3430            *but* source encoding *is* set to UTF-8; see ticket #3843 for the details.
3431         */
3432         if (char_for_insertion > 127 && str_isutf8 (get_codepage_id (mc_global.source_codepage))
3433             && !mc_global.utf8_display)
3434         {
3435             unsigned char str[UTF8_CHAR_LEN + 1];
3436             size_t i;
3437             int res;
3438 
3439             res = g_unichar_to_utf8 (char_for_insertion, (char *) str);
3440             if (res == 0)
3441             {
3442                 str[0] = '.';
3443                 str[1] = '\0';
3444             }
3445             else
3446                 str[res] = '\0';
3447 
3448             for (i = 0; i <= UTF8_CHAR_LEN && str[i] != '\0'; i++)
3449             {
3450                 char_for_insertion = str[i];
3451                 edit_insert (edit, char_for_insertion);
3452             }
3453         }
3454         else
3455             edit_insert (edit, char_for_insertion);
3456 
3457         if (edit_options.auto_para_formatting)
3458         {
3459             format_paragraph (edit, FALSE);
3460             edit->force |= REDRAW_PAGE;
3461         }
3462         else
3463             check_and_wrap_line (edit);
3464         edit->found_len = 0;
3465         edit->prev_col = edit_get_col (edit);
3466         edit->search_start = edit->buffer.curs1;
3467         edit_find_bracket (edit);
3468         return;
3469     }
3470 
3471     switch (command)
3472     {
3473     case CK_TopOnScreen:
3474     case CK_BottomOnScreen:
3475     case CK_Top:
3476     case CK_Bottom:
3477     case CK_PageUp:
3478     case CK_PageDown:
3479     case CK_Home:
3480     case CK_End:
3481     case CK_Up:
3482     case CK_Down:
3483     case CK_Left:
3484     case CK_Right:
3485     case CK_WordLeft:
3486     case CK_WordRight:
3487         if (!edit_options.persistent_selections && edit->mark2 >= 0)
3488         {
3489             if (edit->column_highlight != 0)
3490                 edit_push_undo_action (edit, COLUMN_ON);
3491             edit->column_highlight = 0;
3492             edit_mark_cmd (edit, TRUE);
3493         }
3494         break;
3495     default:
3496         break;
3497     }
3498 
3499     switch (command)
3500     {
3501     case CK_TopOnScreen:
3502     case CK_BottomOnScreen:
3503     case CK_MarkToPageBegin:
3504     case CK_MarkToPageEnd:
3505     case CK_Up:
3506     case CK_Down:
3507     case CK_WordLeft:
3508     case CK_WordRight:
3509     case CK_MarkToWordBegin:
3510     case CK_MarkToWordEnd:
3511     case CK_MarkUp:
3512     case CK_MarkDown:
3513     case CK_MarkColumnUp:
3514     case CK_MarkColumnDown:
3515         if (edit->mark2 == -1)
3516             break;  // marking is following the cursor: may need to highlight a whole line
3517         MC_FALLTHROUGH;
3518     case CK_Left:
3519     case CK_Right:
3520     case CK_MarkLeft:
3521     case CK_MarkRight:
3522         edit->force |= REDRAW_CHAR_ONLY;
3523         break;
3524     default:
3525         break;
3526     }
3527 
3528     // basic cursor key commands
3529     switch (command)
3530     {
3531     case CK_BackSpace:
3532         // if non persistent selection and text selected
3533         if (!edit_options.persistent_selections && edit->mark1 != edit->mark2)
3534             edit_block_delete_cmd (edit);
3535         else if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3536             edit->over_col--;
3537         else if (edit_options.backspace_through_tabs && is_in_indent (&edit->buffer))
3538         {
3539             while (edit_buffer_get_previous_byte (&edit->buffer) != '\n' && edit->buffer.curs1 > 0)
3540                 edit_backspace (edit, TRUE);
3541         }
3542         else if (edit_options.fake_half_tabs && is_in_indent (&edit->buffer)
3543                  && right_of_four_spaces (edit))
3544         {
3545             int i;
3546 
3547             for (i = 0; i < HALF_TAB_SIZE; i++)
3548                 edit_backspace (edit, TRUE);
3549         }
3550         else
3551             edit_backspace (edit, FALSE);
3552         break;
3553     case CK_Delete:
3554         // if non persistent selection and text selected
3555         if (!edit_options.persistent_selections && edit->mark1 != edit->mark2)
3556             edit_block_delete_cmd (edit);
3557         else
3558         {
3559             if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3560                 edit_insert_over (edit);
3561 
3562             if (edit_options.fake_half_tabs && is_in_indent (&edit->buffer)
3563                 && left_of_four_spaces (edit))
3564             {
3565                 int i;
3566 
3567                 for (i = 1; i <= HALF_TAB_SIZE; i++)
3568                     edit_delete (edit, TRUE);
3569             }
3570             else
3571                 edit_delete (edit, FALSE);
3572         }
3573         break;
3574     case CK_DeleteToWordBegin:
3575         edit->over_col = 0;
3576         edit_left_delete_word (edit);
3577         break;
3578     case CK_DeleteToWordEnd:
3579         if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3580             edit_insert_over (edit);
3581 
3582         edit_right_delete_word (edit);
3583         break;
3584     case CK_DeleteLine:
3585         edit_delete_line (edit);
3586         break;
3587     case CK_DeleteToHome:
3588         edit_delete_to_line_begin (edit);
3589         break;
3590     case CK_DeleteToEnd:
3591         edit_delete_to_line_end (edit);
3592         break;
3593     case CK_Enter:
3594         edit->over_col = 0;
3595         if (edit_options.auto_para_formatting)
3596         {
3597             edit_double_newline (edit);
3598             if (edit_options.return_does_auto_indent && !bracketed_pasting_in_progress)
3599                 edit_auto_indent (edit);
3600             format_paragraph (edit, FALSE);
3601         }
3602         else
3603         {
3604             edit_insert (edit, '\n');
3605             if (edit_options.return_does_auto_indent && !bracketed_pasting_in_progress)
3606                 edit_auto_indent (edit);
3607         }
3608         break;
3609     case CK_Return:
3610         edit_insert (edit, '\n');
3611         break;
3612 
3613     case CK_MarkColumnPageUp:
3614         edit->column_highlight = 1;
3615         MC_FALLTHROUGH;
3616     case CK_PageUp:
3617     case CK_MarkPageUp:
3618         edit_move_up (edit, w->lines - (edit->fullscreen ? 1 : 2), TRUE);
3619         break;
3620     case CK_MarkColumnPageDown:
3621         edit->column_highlight = 1;
3622         MC_FALLTHROUGH;
3623     case CK_PageDown:
3624     case CK_MarkPageDown:
3625         edit_move_down (edit, w->lines - (edit->fullscreen ? 1 : 2), TRUE);
3626         break;
3627     case CK_MarkColumnLeft:
3628         edit->column_highlight = 1;
3629         MC_FALLTHROUGH;
3630     case CK_Left:
3631     case CK_MarkLeft:
3632         if (edit_options.fake_half_tabs && is_in_indent (&edit->buffer)
3633             && right_of_four_spaces (edit))
3634         {
3635             if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3636                 edit->over_col--;
3637             else
3638                 edit_cursor_move (edit, -HALF_TAB_SIZE);
3639             edit->force &= (0xFFF - REDRAW_CHAR_ONLY);
3640         }
3641         else
3642             edit_left_char_move_cmd (edit);
3643         break;
3644     case CK_MarkColumnRight:
3645         edit->column_highlight = 1;
3646         MC_FALLTHROUGH;
3647     case CK_Right:
3648     case CK_MarkRight:
3649         if (edit_options.fake_half_tabs && is_in_indent (&edit->buffer)
3650             && left_of_four_spaces (edit))
3651         {
3652             edit_cursor_move (edit, HALF_TAB_SIZE);
3653             edit->force &= (0xFFF - REDRAW_CHAR_ONLY);
3654         }
3655         else
3656             edit_right_char_move_cmd (edit);
3657         break;
3658     case CK_TopOnScreen:
3659     case CK_MarkToPageBegin:
3660         edit_begin_page (edit);
3661         break;
3662     case CK_BottomOnScreen:
3663     case CK_MarkToPageEnd:
3664         edit_end_page (edit);
3665         break;
3666     case CK_WordLeft:
3667     case CK_MarkToWordBegin:
3668         edit->over_col = 0;
3669         edit_left_word_move_cmd (edit);
3670         break;
3671     case CK_WordRight:
3672     case CK_MarkToWordEnd:
3673         edit->over_col = 0;
3674         edit_right_word_move_cmd (edit);
3675         break;
3676     case CK_MarkColumnUp:
3677         edit->column_highlight = 1;
3678         MC_FALLTHROUGH;
3679     case CK_Up:
3680     case CK_MarkUp:
3681         edit_move_up (edit, 1, FALSE);
3682         break;
3683     case CK_MarkColumnDown:
3684         edit->column_highlight = 1;
3685         MC_FALLTHROUGH;
3686     case CK_Down:
3687     case CK_MarkDown:
3688         edit_move_down (edit, 1, FALSE);
3689         break;
3690     case CK_MarkColumnParagraphUp:
3691         edit->column_highlight = 1;
3692         MC_FALLTHROUGH;
3693     case CK_ParagraphUp:
3694     case CK_MarkParagraphUp:
3695         edit_move_up_paragraph (edit, FALSE);
3696         break;
3697     case CK_MarkColumnParagraphDown:
3698         edit->column_highlight = 1;
3699         MC_FALLTHROUGH;
3700     case CK_ParagraphDown:
3701     case CK_MarkParagraphDown:
3702         edit_move_down_paragraph (edit, FALSE);
3703         break;
3704     case CK_MarkColumnScrollUp:
3705         edit->column_highlight = 1;
3706         MC_FALLTHROUGH;
3707     case CK_ScrollUp:
3708     case CK_MarkScrollUp:
3709         edit_move_up (edit, 1, TRUE);
3710         break;
3711     case CK_MarkColumnScrollDown:
3712         edit->column_highlight = 1;
3713         MC_FALLTHROUGH;
3714     case CK_ScrollDown:
3715     case CK_MarkScrollDown:
3716         edit_move_down (edit, 1, TRUE);
3717         break;
3718     case CK_Home:
3719     case CK_MarkToHome:
3720         edit_cursor_to_bol (edit);
3721         break;
3722     case CK_End:
3723     case CK_MarkToEnd:
3724         edit_cursor_to_eol (edit);
3725         break;
3726     case CK_Tab:
3727         // if text marked shift block
3728         if (edit->mark1 != edit->mark2 && !edit_options.persistent_selections)
3729         {
3730             if (edit->mark2 < 0)
3731                 edit_mark_cmd (edit, FALSE);
3732             edit_move_block_to_right (edit);
3733         }
3734         else
3735         {
3736             if (edit_options.cursor_beyond_eol)
3737                 edit_insert_over (edit);
3738             edit_tab_cmd (edit);
3739             if (edit_options.auto_para_formatting)
3740             {
3741                 format_paragraph (edit, FALSE);
3742                 edit->force |= REDRAW_PAGE;
3743             }
3744             else
3745                 check_and_wrap_line (edit);
3746         }
3747         break;
3748 
3749     case CK_InsertOverwrite:
3750         edit->overwrite = !edit->overwrite;
3751         break;
3752 
3753     case CK_Mark:
3754         if (edit->mark2 >= 0)
3755         {
3756             if (edit->column_highlight != 0)
3757                 edit_push_undo_action (edit, COLUMN_ON);
3758             edit->column_highlight = 0;
3759         }
3760         edit_mark_cmd (edit, FALSE);
3761         break;
3762     case CK_MarkColumn:
3763         if (edit->column_highlight == 0)
3764             edit_push_undo_action (edit, COLUMN_OFF);
3765         edit->column_highlight = 1;
3766         edit_mark_cmd (edit, FALSE);
3767         break;
3768     case CK_MarkAll:
3769         edit_set_markers (edit, 0, edit->buffer.size, 0, 0);
3770         edit->force |= REDRAW_PAGE;
3771         break;
3772     case CK_Unmark:
3773         if (edit->column_highlight != 0)
3774             edit_push_undo_action (edit, COLUMN_ON);
3775         edit->column_highlight = 0;
3776         edit_mark_cmd (edit, TRUE);
3777         break;
3778     case CK_MarkWord:
3779         if (edit->column_highlight != 0)
3780             edit_push_undo_action (edit, COLUMN_ON);
3781         edit->column_highlight = 0;
3782         edit_mark_current_word_cmd (edit);
3783         break;
3784     case CK_MarkLine:
3785         if (edit->column_highlight != 0)
3786             edit_push_undo_action (edit, COLUMN_ON);
3787         edit->column_highlight = 0;
3788         edit_mark_current_line_cmd (edit);
3789         break;
3790 
3791     case CK_Bookmark:
3792         book_mark_clear (edit, edit->buffer.curs_line, BOOK_MARK_FOUND_COLOR);
3793         if (book_mark_query_color (edit, edit->buffer.curs_line, BOOK_MARK_COLOR))
3794             book_mark_clear (edit, edit->buffer.curs_line, BOOK_MARK_COLOR);
3795         else
3796             book_mark_insert (edit, edit->buffer.curs_line, BOOK_MARK_COLOR);
3797         break;
3798     case CK_BookmarkFlush:
3799         book_mark_flush (edit, BOOK_MARK_COLOR);
3800         book_mark_flush (edit, BOOK_MARK_FOUND_COLOR);
3801         edit->force |= REDRAW_PAGE;
3802         break;
3803     case CK_BookmarkNext:
3804         if (edit->book_mark != NULL)
3805         {
3806             edit_book_mark_t *p;
3807 
3808             p = book_mark_find (edit, edit->buffer.curs_line);
3809             if (p->next != NULL)
3810             {
3811                 p = p->next;
3812                 if (p->line >= edit->start_line + w->lines || p->line < edit->start_line)
3813                     edit_move_display (edit, p->line - w->lines / 2);
3814                 edit_move_to_line (edit, p->line);
3815             }
3816         }
3817         break;
3818     case CK_BookmarkPrev:
3819         if (edit->book_mark != NULL)
3820         {
3821             edit_book_mark_t *p;
3822 
3823             p = book_mark_find (edit, edit->buffer.curs_line);
3824             while (p->line == edit->buffer.curs_line)
3825                 if (p->prev != NULL)
3826                     p = p->prev;
3827             if (p->line >= 0)
3828             {
3829                 if (p->line >= edit->start_line + w->lines || p->line < edit->start_line)
3830                     edit_move_display (edit, p->line - w->lines / 2);
3831                 edit_move_to_line (edit, p->line);
3832             }
3833         }
3834         break;
3835 
3836     case CK_Top:
3837     case CK_MarkToFileBegin:
3838         edit_move_to_top (edit);
3839         break;
3840     case CK_Bottom:
3841     case CK_MarkToFileEnd:
3842         edit_move_to_bottom (edit);
3843         break;
3844 
3845     case CK_Copy:
3846         if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3847             edit_insert_over (edit);
3848         edit_block_copy_cmd (edit);
3849         break;
3850     case CK_Remove:
3851         edit_block_delete_cmd (edit);
3852         break;
3853     case CK_Move:
3854         edit_block_move_cmd (edit);
3855         break;
3856 
3857     case CK_BlockShiftLeft:
3858         if (edit->mark1 != edit->mark2)
3859             edit_move_block_to_left (edit);
3860         break;
3861     case CK_BlockShiftRight:
3862         if (edit->mark1 != edit->mark2)
3863             edit_move_block_to_right (edit);
3864         break;
3865     case CK_Store:
3866         edit_copy_to_X_buf_cmd (edit);
3867         break;
3868     case CK_Cut:
3869         edit_cut_to_X_buf_cmd (edit);
3870         break;
3871     case CK_Paste:
3872         // if non persistent selection and text selected
3873         if (!edit_options.persistent_selections && edit->mark1 != edit->mark2)
3874             edit_block_delete_cmd (edit);
3875         if (edit_options.cursor_beyond_eol && edit->over_col > 0)
3876             edit_insert_over (edit);
3877         edit_paste_from_X_buf_cmd (edit);
3878         if (!edit_options.persistent_selections && edit->mark2 >= 0)
3879         {
3880             if (edit->column_highlight != 0)
3881                 edit_push_undo_action (edit, COLUMN_ON);
3882             edit->column_highlight = 0;
3883             edit_mark_cmd (edit, TRUE);
3884         }
3885         break;
3886     case CK_History:
3887         edit_paste_from_history (edit);
3888         break;
3889 
3890     case CK_SaveAs:
3891         edit_save_as_cmd (edit);
3892         break;
3893     case CK_Save:
3894         edit_save_confirm_cmd (edit);
3895         break;
3896     case CK_BlockSave:
3897         edit_save_block_cmd (edit);
3898         break;
3899     case CK_InsertFile:
3900         edit_insert_file_cmd (edit);
3901         break;
3902 
3903     case CK_FilePrev:
3904         edit_load_back_cmd (edit);
3905         break;
3906     case CK_FileNext:
3907         edit_load_forward_cmd (edit);
3908         break;
3909 
3910     case CK_SyntaxChoose:
3911         edit_syntax_dialog (edit);
3912         break;
3913 
3914     case CK_Search:
3915         edit_search_cmd (edit, FALSE);
3916         break;
3917     case CK_SearchContinue:
3918         edit_search_cmd (edit, TRUE);
3919         break;
3920     case CK_Replace:
3921         edit_replace_cmd (edit, FALSE);
3922         break;
3923     case CK_ReplaceContinue:
3924         edit_replace_cmd (edit, TRUE);
3925         break;
3926     case CK_Complete:
3927         // if text marked shift block
3928         if (edit->mark1 != edit->mark2 && !edit_options.persistent_selections)
3929             edit_move_block_to_left (edit);
3930         else
3931             edit_complete_word_cmd (edit);
3932         break;
3933     case CK_Find:
3934         edit_get_match_keyword_cmd (edit);
3935         break;
3936 
3937 #ifdef HAVE_ASPELL
3938     case CK_SpellCheckCurrentWord:
3939         edit_suggest_current_word (edit);
3940         break;
3941     case CK_SpellCheck:
3942         edit_spellcheck_file (edit);
3943         break;
3944     case CK_SpellCheckSelectLang:
3945         edit_set_spell_lang ();
3946         break;
3947 #endif
3948 
3949     case CK_Date:
3950     {
3951         char s[BUF_MEDIUM];
3952         // fool gcc to prevent a Y2K warning
3953         char time_format[] = "_c";
3954         time_format[0] = '%';
3955 
3956         FMT_LOCALTIME_CURRENT (s, sizeof (s), time_format);
3957         edit_print_string (edit, s);
3958         edit->force |= REDRAW_PAGE;
3959     }
3960     break;
3961     case CK_Goto:
3962         edit_goto_cmd (edit);
3963         break;
3964     case CK_ParagraphFormat:
3965         format_paragraph (edit, TRUE);
3966         edit->force |= REDRAW_PAGE;
3967         break;
3968     case CK_MacroDelete:
3969         edit_delete_macro_cmd (edit);
3970         break;
3971     case CK_MatchBracket:
3972         edit_goto_matching_bracket (edit);
3973         break;
3974     case CK_UserMenu:
3975         edit_user_menu (edit, NULL, -1);
3976         break;
3977     case CK_Sort:
3978         edit_sort_cmd (edit);
3979         break;
3980     case CK_ExternalCommand:
3981         edit_ext_cmd (edit);
3982         break;
3983     case CK_EditMail:
3984         edit_mail_dialog (edit);
3985         break;
3986     case CK_SelectCodepage:
3987         edit_select_codepage_cmd (edit);
3988         break;
3989     case CK_InsertLiteral:
3990         edit_insert_literal_cmd (edit);
3991         break;
3992     case CK_MacroStartStopRecord:
3993         edit_begin_end_macro_cmd (edit);
3994         break;
3995     case CK_RepeatStartStopRecord:
3996         edit_begin_end_repeat_cmd (edit);
3997         break;
3998     case CK_ExtendedKeyMap:
3999         WIDGET (edit)->ext_mode = TRUE;
4000         break;
4001     default:
4002         break;
4003     }
4004 
4005     // CK_PipeBlock
4006     if ((command / CK_PipeBlock (0)) == 1)
4007         edit_block_process_cmd (edit, command - CK_PipeBlock (0));
4008 
4009     // keys which must set the col position, and the search vars
4010     switch (command)
4011     {
4012     case CK_Search:
4013     case CK_SearchContinue:
4014     case CK_Replace:
4015     case CK_ReplaceContinue:
4016     case CK_Complete:
4017         edit->prev_col = edit_get_col (edit);
4018         break;
4019     case CK_Up:
4020     case CK_MarkUp:
4021     case CK_MarkColumnUp:
4022     case CK_Down:
4023     case CK_MarkDown:
4024     case CK_MarkColumnDown:
4025     case CK_PageUp:
4026     case CK_MarkPageUp:
4027     case CK_MarkColumnPageUp:
4028     case CK_PageDown:
4029     case CK_MarkPageDown:
4030     case CK_MarkColumnPageDown:
4031     case CK_Top:
4032     case CK_MarkToFileBegin:
4033     case CK_Bottom:
4034     case CK_MarkToFileEnd:
4035     case CK_ParagraphUp:
4036     case CK_MarkParagraphUp:
4037     case CK_MarkColumnParagraphUp:
4038     case CK_ParagraphDown:
4039     case CK_MarkParagraphDown:
4040     case CK_MarkColumnParagraphDown:
4041     case CK_ScrollUp:
4042     case CK_MarkScrollUp:
4043     case CK_MarkColumnScrollUp:
4044     case CK_ScrollDown:
4045     case CK_MarkScrollDown:
4046     case CK_MarkColumnScrollDown:
4047         edit->search_start = edit->buffer.curs1;
4048         edit->found_len = 0;
4049         break;
4050     default:
4051         edit->found_len = 0;
4052         edit->prev_col = edit_get_col (edit);
4053         edit->search_start = edit->buffer.curs1;
4054     }
4055     edit_find_bracket (edit);
4056 
4057     if (edit_options.auto_para_formatting)
4058     {
4059         switch (command)
4060         {
4061         case CK_BackSpace:
4062         case CK_Delete:
4063         case CK_DeleteToWordBegin:
4064         case CK_DeleteToWordEnd:
4065         case CK_DeleteToHome:
4066         case CK_DeleteToEnd:
4067             format_paragraph (edit, FALSE);
4068             edit->force |= REDRAW_PAGE;
4069             break;
4070         default:
4071             break;
4072         }
4073     }
4074 }
4075 
4076 /* --------------------------------------------------------------------------------------------- */
4077 
4078 void
4079 edit_stack_init (void)
     /*   */
4080 {
4081     for (edit_stack_iterator = 0; edit_stack_iterator < MAX_HISTORY_MOVETO; edit_stack_iterator++)
4082         edit_arg_init (&edit_history_moveto[edit_stack_iterator], NULL, -1);
4083 
4084     edit_stack_iterator = 0;
4085 }
4086 
4087 /* --------------------------------------------------------------------------------------------- */
4088 
4089 void
4090 edit_stack_free (void)
     /*   */
4091 {
4092     for (edit_stack_iterator = 0; edit_stack_iterator < MAX_HISTORY_MOVETO; edit_stack_iterator++)
4093         vfs_path_free (edit_history_moveto[edit_stack_iterator].file_vpath, TRUE);
4094 }
4095 
4096 /* --------------------------------------------------------------------------------------------- */
4097 /** move i lines */
4098 
4099 void
4100 edit_move_up (WEdit *edit, long i, gboolean do_scroll)
     /*   */
4101 {
4102     edit_move_updown (edit, i, do_scroll, TRUE);
4103 }
4104 
4105 /* --------------------------------------------------------------------------------------------- */
4106 /** move i lines */
4107 
4108 void
4109 edit_move_down (WEdit *edit, long i, gboolean do_scroll)
     /*   */
4110 {
4111     edit_move_updown (edit, i, do_scroll, FALSE);
4112 }
4113 
4114 /* --------------------------------------------------------------------------------------------- */
4115 /**
4116  * Create edit_arg_t object from vfs_path_t object and the line number.
4117  *
4118  * @param file_vpath  file path object
4119  * @param line_number line number. If value is 0, try to restore saved position.
4120  * @return edit_arg_t object
4121  */
4122 
4123 edit_arg_t *
4124 edit_arg_vpath_new (vfs_path_t *file_vpath, long line_number)
     /*   */
4125 {
4126     edit_arg_t *arg;
4127 
4128     arg = g_new (edit_arg_t, 1);
4129     arg->file_vpath = file_vpath;
4130     arg->line_number = line_number;
4131 
4132     return arg;
4133 }
4134 
4135 /* --------------------------------------------------------------------------------------------- */
4136 /**
4137  * Create edit_arg_t object from file name and the line number.
4138  *
4139  * @param file_name   file name
4140  * @param line_number line number. If value is 0, try to restore saved position.
4141  * @return edit_arg_t object
4142  */
4143 
4144 edit_arg_t *
4145 edit_arg_new (const char *file_name, long line_number)
     /*   */
4146 {
4147     return edit_arg_vpath_new (vfs_path_from_str (file_name), line_number);
4148 }
4149 
4150 /* --------------------------------------------------------------------------------------------- */
4151 /**
4152  * Initialize edit_arg_t object.
4153  *
4154  * @param arg  edit_arg_t object
4155  * @param vpath vfs_path_t object
4156  * @param line line number
4157  */
4158 
4159 void
4160 edit_arg_init (edit_arg_t *arg, vfs_path_t *vpath, long line)
     /*   */
4161 {
4162     arg->file_vpath = (vfs_path_t *) vpath;
4163     arg->line_number = line;
4164 }
4165 
4166 /* --------------------------------------------------------------------------------------------- */
4167 /**
4168  * Apply new values to edit_arg_t object members.
4169  *
4170  * @param arg  edit_arg_t object
4171  * @param vpath vfs_path_t object
4172  * @param line line number
4173  */
4174 
4175 void
4176 edit_arg_assign (edit_arg_t *arg, vfs_path_t *vpath, long line)
     /*   */
4177 {
4178     vfs_path_free (arg->file_vpath, TRUE);
4179     edit_arg_init (arg, vpath, line);
4180 }
4181 
4182 /* --------------------------------------------------------------------------------------------- */
4183 /**
4184  * Free the edit_arg_t object.
4185  *
4186  * @param arg edit_arg_t object
4187  */
4188 
4189 void
4190 edit_arg_free (edit_arg_t *arg)
     /*   */
4191 {
4192     vfs_path_free (arg->file_vpath, TRUE);
4193     g_free (arg);
4194 }
4195 
4196 /* --------------------------------------------------------------------------------------------- */
4197 
4198 const char *
4199 edit_get_file_name (const WEdit *edit)
     /*   */
4200 {
4201     return vfs_path_as_str (edit->filename_vpath);
4202 }
4203 
4204 /* --------------------------------------------------------------------------------------------- */
/* */
root/src/editor/edit.c

DEFINITIONS
