root/src/diffviewer/search.c

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DEFINITIONS

This source file includes following definitions.
  1. mcdiffview_dialog_search
  2. mcdiffview_do_search_backward
  3. mcdiffview_do_search_forward
  4. mcdiffview_do_search
  5. dview_search_cmd
  6. dview_continue_search_cmd

   1 /*
   2    Search functions for diffviewer.
   3 
   4    Copyright (C) 2010-2022
   5    Free Software Foundation, Inc.
   6 
   7    Written by:
   8    Slava Zanko <slavazanko@gmail.com>, 2010.
   9    Andrew Borodin <aborodin@vmail.ru>, 2012-2022
  10 
  11    This file is part of the Midnight Commander.
  12 
  13    The Midnight Commander is free software: you can redistribute it
  14    and/or modify it under the terms of the GNU General Public License as
  15    published by the Free Software Foundation, either version 3 of the License,
  16    or (at your option) any later version.
  17 
  18    The Midnight Commander is distributed in the hope that it will be useful,
  19    but WITHOUT ANY WARRANTY; without even the implied warranty of
  20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21    GNU General Public License for more details.
  22 
  23    You should have received a copy of the GNU General Public License
  24    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  25  */
  26 
  27 #include <config.h>
  28 
  29 #include <stdio.h>
  30 
  31 #include "lib/global.h"
  32 #include "lib/strutil.h"
  33 #include "lib/tty/key.h"
  34 #include "lib/widget.h"
  35 #ifdef HAVE_CHARSET
  36 #include "lib/charsets.h"
  37 #endif
  38 
  39 #include "src/history.h"
  40 
  41 #include "internal.h"
  42 
  43 /*** global variables ****************************************************************************/
  44 
  45 /*** file scope macro definitions ****************************************************************/
  46 
  47 /*** file scope type declarations ****************************************************************/
  48 
  49 typedef struct mcdiffview_search_options_struct
  50 {
  51     mc_search_type_t type;
  52     gboolean case_sens;
  53     gboolean backwards;
  54     gboolean whole_words;
  55     gboolean all_codepages;
  56 } mcdiffview_search_options_t;
  57 
  58 /*** file scope variables ************************************************************************/
  59 
  60 static mcdiffview_search_options_t mcdiffview_search_options = {
  61     .type = MC_SEARCH_T_NORMAL,
  62     .case_sens = FALSE,
  63     .backwards = FALSE,
  64     .whole_words = FALSE,
  65     .all_codepages = FALSE,
  66 };
  67 
  68 /* --------------------------------------------------------------------------------------------- */
  69 /*** file scope functions ************************************************************************/
  70 /* --------------------------------------------------------------------------------------------- */
  71 
  72 static gboolean
  73 mcdiffview_dialog_search (WDiff * dview)
     /* [previous][next][first][last][top][bottom][index][help]  */
  74 {
  75     char *exp = NULL;
  76     int qd_result;
  77     size_t num_of_types = 0;
  78     gchar **list_of_types;
  79 
  80     list_of_types = mc_search_get_types_strings_array (&num_of_types);
  81 
  82     {
  83         quick_widget_t quick_widgets[] = {
  84             /* *INDENT-OFF* */
  85             QUICK_LABELED_INPUT (N_("Enter search string:"), input_label_above, INPUT_LAST_TEXT,
  86             MC_HISTORY_SHARED_SEARCH, &exp, NULL, FALSE, FALSE, INPUT_COMPLETE_NONE),
  87             QUICK_SEPARATOR (TRUE),
  88             QUICK_START_COLUMNS,
  89                 QUICK_RADIO (num_of_types, (const char **) list_of_types,
  90                              (int *) &mcdiffview_search_options.type, NULL),
  91             QUICK_NEXT_COLUMN,
  92                 QUICK_CHECKBOX (N_("Cas&e sensitive"), &mcdiffview_search_options.case_sens, NULL),
  93                 QUICK_CHECKBOX (N_("&Backwards"), &mcdiffview_search_options.backwards, NULL),
  94                 QUICK_CHECKBOX (N_("&Whole words"), &mcdiffview_search_options.whole_words, NULL),
  95 #ifdef HAVE_CHARSET
  96                 QUICK_CHECKBOX (N_("&All charsets"), &mcdiffview_search_options.all_codepages, NULL),
  97 #endif
  98             QUICK_STOP_COLUMNS,
  99             QUICK_BUTTONS_OK_CANCEL,
 100             QUICK_END
 101             /* *INDENT-ON* */
 102         };
 103 
 104         WRect r = { -1, -1, 0, 58 };
 105 
 106         quick_dialog_t qdlg = {
 107             r, N_("Search"), "[Input Line Keys]",
 108             quick_widgets, NULL, NULL
 109         };
 110 
 111         qd_result = quick_dialog (&qdlg);
 112     }
 113 
 114     g_strfreev (list_of_types);
 115 
 116     if (qd_result == B_CANCEL || exp[0] == '\0')
 117     {
 118         g_free (exp);
 119         return FALSE;
 120     }
 121 
 122 #ifdef HAVE_CHARSET
 123     {
 124         GString *tmp;
 125 
 126         tmp = str_convert_to_input (exp);
 127         g_free (exp);
 128         exp = g_string_free (tmp, FALSE);
 129     }
 130 #endif
 131 
 132     g_free (dview->search.last_string);
 133     dview->search.last_string = exp;
 134 
 135     return TRUE;
 136 }
 137 
 138 /* --------------------------------------------------------------------------------------------- */
 139 
 140 static gboolean
 141 mcdiffview_do_search_backward (WDiff * dview)
     /* [previous][next][first][last][top][bottom][index][help]  */
 142 {
 143     ssize_t ind;
 144 
 145     if (dview->search.last_accessed_num_line < 0)
 146     {
 147         dview->search.last_accessed_num_line = -1;
 148         return FALSE;
 149     }
 150 
 151     if ((size_t) dview->search.last_accessed_num_line >= dview->a[dview->ord]->len)
 152         dview->search.last_accessed_num_line = (ssize_t) dview->a[dview->ord]->len;
 153 
 154     for (ind = --dview->search.last_accessed_num_line; ind >= 0; ind--)
 155     {
 156         DIFFLN *p;
 157 
 158         p = (DIFFLN *) & g_array_index (dview->a[dview->ord], DIFFLN, (size_t) ind);
 159         if (p->u.len == 0)
 160             continue;
 161 
 162         if (mc_search_run (dview->search.handle, p->p, 0, p->u.len, NULL))
 163         {
 164             dview->skip_rows = dview->search.last_found_line =
 165                 dview->search.last_accessed_num_line = ind;
 166             return TRUE;
 167         }
 168     }
 169     return FALSE;
 170 }
 171 
 172 /* --------------------------------------------------------------------------------------------- */
 173 
 174 
 175 static gboolean
 176 mcdiffview_do_search_forward (WDiff * dview)
     /* [previous][next][first][last][top][bottom][index][help]  */
 177 {
 178     size_t ind;
 179 
 180     if (dview->search.last_accessed_num_line < 0)
 181         dview->search.last_accessed_num_line = -1;
 182     else if ((size_t) dview->search.last_accessed_num_line >= dview->a[dview->ord]->len)
 183     {
 184         dview->search.last_accessed_num_line = (ssize_t) dview->a[dview->ord]->len;
 185         return FALSE;
 186     }
 187 
 188     for (ind = (size_t)++ dview->search.last_accessed_num_line; ind < dview->a[dview->ord]->len;
 189          ind++)
 190     {
 191         DIFFLN *p;
 192 
 193         p = (DIFFLN *) & g_array_index (dview->a[dview->ord], DIFFLN, ind);
 194         if (p->u.len == 0)
 195             continue;
 196 
 197         if (mc_search_run (dview->search.handle, p->p, 0, p->u.len, NULL))
 198         {
 199             dview->skip_rows = dview->search.last_found_line =
 200                 dview->search.last_accessed_num_line = (ssize_t) ind;
 201             return TRUE;
 202         }
 203     }
 204     return FALSE;
 205 }
 206 
 207 /* --------------------------------------------------------------------------------------------- */
 208 
 209 static void
 210 mcdiffview_do_search (WDiff * dview)
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 211 {
 212     gboolean present_result = FALSE;
 213 
 214     tty_enable_interrupt_key ();
 215 
 216     if (mcdiffview_search_options.backwards)
 217     {
 218         present_result = mcdiffview_do_search_backward (dview);
 219     }
 220     else
 221     {
 222         present_result = mcdiffview_do_search_forward (dview);
 223     }
 224 
 225     tty_disable_interrupt_key ();
 226 
 227     if (!present_result)
 228     {
 229         dview->search.last_found_line = -1;
 230         query_dialog (_("Search"), _(STR_E_NOTFOUND), D_NORMAL, 1, _("&Dismiss"));
 231     }
 232 }
 233 
 234 /* --------------------------------------------------------------------------------------------- */
 235 /*** public functions ****************************************************************************/
 236 /* --------------------------------------------------------------------------------------------- */
 237 
 238 void
 239 dview_search_cmd (WDiff * dview)
     /* [previous][next][first][last][top][bottom][index][help]  */
 240 {
 241     if (dview->dsrc != DATA_SRC_MEM)
 242     {
 243         error_dialog (_("Search"), _("Search is disabled"));
 244         return;
 245     }
 246 
 247     if (!mcdiffview_dialog_search (dview))
 248         return;
 249 
 250     mc_search_free (dview->search.handle);
 251 #ifdef HAVE_CHARSET
 252     dview->search.handle = mc_search_new (dview->search.last_string, cp_source);
 253 #else
 254     dview->search.handle = mc_search_new (dview->search.last_string, NULL);
 255 #endif
 256 
 257     if (dview->search.handle == NULL)
 258         return;
 259 
 260     dview->search.handle->search_type = mcdiffview_search_options.type;
 261 #ifdef HAVE_CHARSET
 262     dview->search.handle->is_all_charsets = mcdiffview_search_options.all_codepages;
 263 #endif
 264     dview->search.handle->is_case_sensitive = mcdiffview_search_options.case_sens;
 265     dview->search.handle->whole_words = mcdiffview_search_options.whole_words;
 266 
 267     mcdiffview_do_search (dview);
 268 }
 269 
 270 /* --------------------------------------------------------------------------------------------- */
 271 
 272 void
 273 dview_continue_search_cmd (WDiff * dview)
     /* [previous][next][first][last][top][bottom][index][help]  */
 274 {
 275     if (dview->dsrc != DATA_SRC_MEM)
 276         error_dialog (_("Search"), _("Search is disabled"));
 277     else if (dview->search.handle == NULL)
 278         dview_search_cmd (dview);
 279     else
 280         mcdiffview_do_search (dview);
 281 }
 282 
 283 /* --------------------------------------------------------------------------------------------- */

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