src/diffviewer/search.c

   1 /*
   2    Search functions for diffviewer.
   3
   4    Copyright (C) 2010 The Free Software Foundation, Inc.
   5
   6    Written by:
   7    Slava Zanko <slavazanko@gmail.com>, 2010.
   8
   9    This file is part of the Midnight Commander.
  10
  11    The Midnight Commander is free software; you can redistribute it
  12    and/or modify it under the terms of the GNU General Public License as
  13    published by the Free Software Foundation; either version 2 of the
  14    License, or (at your option) any later version.
  15
  16    The Midnight Commander is distributed in the hope that it will be
  17    useful, but WITHOUT ANY WARRANTY; without even the implied warranty
  18    of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  24    MA 02110-1301, USA.
  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 #include "lib/charsets.h"
  36
  37 #include "src/history.h"
  38
  39 #include "internal.h"
  40
  41 /*** global variables ****************************************************************************/
  42
  43 /*** file scope macro definitions ****************************************************************/
  44
  45 #define SEARCH_DLG_WIDTH  58
  46 #define SEARCH_DLG_HEIGHT 13
  47
  48 /*** file scope type declarations ****************************************************************/
  49
  50 typedef struct mcdiffview_search_options_struct
  51 {
  52     mc_search_type_t type;
  53     gboolean case_sens;
  54     gboolean backwards;
  55     gboolean whole_words;
  56     gboolean all_codepages;
  57 } mcdiffview_search_options_t;
  58
  59 /*** file scope variables ************************************************************************/
  60
  61 static mcdiffview_search_options_t mcdiffview_search_options = {
  62     .type = MC_SEARCH_T_NORMAL,
  63     .case_sens = FALSE,
  64     .backwards = FALSE,
  65     .whole_words = FALSE,
  66     .all_codepages = FALSE,
  67 };
  68
  69 /*** file scope functions ************************************************************************/
  70 /* --------------------------------------------------------------------------------------------- */
  71
  72 #define DLG_BTN1_text N_("&Cancel")
  73 #define DLG_BTN2_text N_("&OK")
  74
  75 static void
  76 mcdiffview_dialog_fix_buttons_positions (QuickDialog * dlg)
  77 {
  78     size_t str_cancel_len, str_ok_len;
  79     size_t first_start_position;
  80
  81     str_cancel_len = str_term_width1 (_(DLG_BTN1_text)) + 4;
  82     str_ok_len = str_term_width1 (_(DLG_BTN2_text)) + 6;
  83
  84     first_start_position = (SEARCH_DLG_WIDTH - str_cancel_len - str_ok_len - 1) / 2;
  85     dlg->widgets[1].relative_x = first_start_position;
  86     dlg->widgets[0].relative_x = first_start_position + str_ok_len + 1;
  87 }
  88
  89 /* --------------------------------------------------------------------------------------------- */
  90
  91 static gboolean
  92 mcdiffview_dialog_search (WDiff * dview)
  93 {
  94     char *exp = NULL;
  95
  96     int qd_result;
  97
  98     size_t num_of_types;
  99     gchar **list_of_types = mc_search_get_types_strings_array (&num_of_types);
 100
 101     QuickWidget search_widgets[] = {
 102         /* 0 */
 103         QUICK_BUTTON (3, SEARCH_DLG_WIDTH, SEARCH_DLG_HEIGHT - 3, SEARCH_DLG_HEIGHT, DLG_BTN1_text,
 104                       B_CANCEL, NULL),
 105         /* 1 */
 106         QUICK_BUTTON (3, SEARCH_DLG_WIDTH, SEARCH_DLG_HEIGHT - 3, SEARCH_DLG_HEIGHT, DLG_BTN2_text,
 107                       B_ENTER, NULL),
 108         /* 2 */
 109 #ifdef HAVE_CHARSET
 110         QUICK_CHECKBOX (33, SEARCH_DLG_WIDTH, 8, SEARCH_DLG_HEIGHT, N_("All charsets"),
 111                         &mcdiffview_search_options.all_codepages),
 112 #endif
 113
 114         QUICK_CHECKBOX (33, SEARCH_DLG_WIDTH, 7, SEARCH_DLG_HEIGHT, N_("&Whole words"),
 115                         &mcdiffview_search_options.whole_words),
 116         /* 3 */
 117         QUICK_CHECKBOX (33, SEARCH_DLG_WIDTH, 6, SEARCH_DLG_HEIGHT, N_("&Backwards"),
 118                         &mcdiffview_search_options.backwards),
 119         /* 4 */
 120         QUICK_CHECKBOX (33, SEARCH_DLG_WIDTH, 5, SEARCH_DLG_HEIGHT, N_("Case &sensitive"),
 121                         &mcdiffview_search_options.case_sens),
 122         /* 5 */
 123         QUICK_RADIO (3, SEARCH_DLG_WIDTH, 5, SEARCH_DLG_HEIGHT,
 124                      num_of_types, (const char **) list_of_types,
 125                      (int *) &mcdiffview_search_options.type),
 126         /* 6 */
 127         QUICK_INPUT (3, SEARCH_DLG_WIDTH, 3, SEARCH_DLG_HEIGHT,
 128                      INPUT_LAST_TEXT, SEARCH_DLG_WIDTH - 6, 0,
 129                      MC_HISTORY_SHARED_SEARCH,
 130                      &exp),
 131         /* 7 */
 132         QUICK_LABEL (3, SEARCH_DLG_WIDTH, 2, SEARCH_DLG_HEIGHT, N_("Enter search string:")),
 133         QUICK_END
 134     };
 135
 136     QuickDialog search_input = {
 137         SEARCH_DLG_WIDTH, SEARCH_DLG_HEIGHT, -1, -1,
 138         N_("Search"), "[Input Line Keys]",
 139         search_widgets, NULL, FALSE
 140     };
 141
 142     mcdiffview_dialog_fix_buttons_positions (&search_input);
 143
 144     qd_result = quick_dialog (&search_input);
 145     g_strfreev (list_of_types);
 146
 147
 148     if ((qd_result == B_CANCEL) || (exp == NULL) || (exp[0] == '\0'))
 149     {
 150         g_free (exp);
 151         return FALSE;
 152     }
 153
 154 #ifdef HAVE_CHARSET
 155     {
 156         GString *tmp = str_convert_to_input (exp);
 157
 158         if (tmp)
 159         {
 160             g_free (exp);
 161             exp = g_string_free (tmp, FALSE);
 162         }
 163     }
 164 #endif
 165
 166     g_free (dview->search.last_string);
 167     dview->search.last_string = exp;
 168
 169     return TRUE;
 170 }
 171
 172 /* --------------------------------------------------------------------------------------------- */
 173
 174 static gboolean
 175 mcdiffview_do_search_backward (WDiff * dview)
 176 {
 177     ssize_t ind;
 178     DIFFLN *p;
 179
 180     if (dview->search.last_accessed_num_line < 0)
 181     {
 182         dview->search.last_accessed_num_line = -1;
 183         return FALSE;
 184     }
 185
 186     if ((size_t) dview->search.last_accessed_num_line >= dview->a[dview->ord]->len)
 187         dview->search.last_accessed_num_line = (ssize_t) dview->a[dview->ord]->len;
 188
 189     for (ind = --dview->search.last_accessed_num_line; ind >= 0; ind--)
 190     {
 191         p = (DIFFLN *) & g_array_index (dview->a[dview->ord], DIFFLN, (size_t) ind);
 192         if (p->u.len == 0)
 193             continue;
 194
 195         if (mc_search_run (dview->search.handle, p->p, 0, p->u.len, NULL))
 196         {
 197             dview->skip_rows = dview->search.last_found_line =
 198                 dview->search.last_accessed_num_line = ind;
 199             return TRUE;
 200         }
 201     }
 202     return FALSE;
 203 }
 204
 205 /* --------------------------------------------------------------------------------------------- */
 206
 207
 208 static gboolean
 209 mcdiffview_do_search_forward (WDiff * dview)
 210 {
 211     size_t ind;
 212     DIFFLN *p;
 213
 214     if (dview->search.last_accessed_num_line < 0)
 215         dview->search.last_accessed_num_line = -1;
 216     else if ((size_t) dview->search.last_accessed_num_line >= dview->a[dview->ord]->len)
 217     {
 218         dview->search.last_accessed_num_line = (ssize_t) dview->a[dview->ord]->len;
 219         return FALSE;
 220     }
 221
 222     for (ind = (size_t)++ dview->search.last_accessed_num_line; ind < dview->a[dview->ord]->len;
 223          ind++)
 224     {
 225         p = (DIFFLN *) & g_array_index (dview->a[dview->ord], DIFFLN, ind);
 226         if (p->u.len == 0)
 227             continue;
 228
 229         if (mc_search_run (dview->search.handle, p->p, 0, p->u.len, NULL))
 230         {
 231             dview->skip_rows = dview->search.last_found_line =
 232                 dview->search.last_accessed_num_line = (ssize_t) ind;
 233             return TRUE;
 234         }
 235     }
 236     return FALSE;
 237 }
 238
 239 /* --------------------------------------------------------------------------------------------- */
 240
 241 static void
 242 mcdiffview_do_search (WDiff * dview)
 243 {
 244     gboolean present_result = FALSE;
 245
 246     tty_enable_interrupt_key ();
 247
 248     if (mcdiffview_search_options.backwards)
 249     {
 250         present_result = mcdiffview_do_search_backward (dview);
 251     }
 252     else
 253     {
 254         present_result = mcdiffview_do_search_forward (dview);
 255     }
 256
 257     tty_disable_interrupt_key ();
 258
 259     if (!present_result)
 260     {
 261         dview->search.last_found_line = -1;
 262         error_dialog (_("Search"), _("Search string not found"));
 263     }
 264 }
 265
 266 /* --------------------------------------------------------------------------------------------- */
 267 /*** public functions ****************************************************************************/
 268 /* --------------------------------------------------------------------------------------------- */
 269
 270 void
 271 dview_search_cmd (WDiff * dview)
 272 {
 273     if (dview->dsrc != DATA_SRC_MEM)
 274     {
 275         error_dialog (_("Search"), _("Search is disabled"));
 276         return;
 277     }
 278
 279     if (!mcdiffview_dialog_search (dview))
 280         return;
 281
 282     mc_search_free (dview->search.handle);
 283     dview->search.handle = mc_search_new (dview->search.last_string, -1);
 284
 285     if (dview->search.handle == NULL)
 286         return;
 287
 288     dview->search.handle->search_type = mcdiffview_search_options.type;
 289     dview->search.handle->is_all_charsets = mcdiffview_search_options.all_codepages;
 290     dview->search.handle->is_case_sensitive = mcdiffview_search_options.case_sens;
 291     dview->search.handle->whole_words = mcdiffview_search_options.whole_words;
 292
 293     mcdiffview_do_search (dview);
 294 }
 295
 296 /* --------------------------------------------------------------------------------------------- */
 297
 298 void
 299 dview_continue_search_cmd (WDiff * dview)
 300 {
 301     if (dview->dsrc != DATA_SRC_MEM)
 302         error_dialog (_("Search"), _("Search is disabled"));
 303     else if (dview->search.handle == NULL)
 304         dview_search_cmd (dview);
 305     else
 306         mcdiffview_do_search (dview);
 307 }
 308
 309 /* --------------------------------------------------------------------------------------------- */