src/pan-view/pan-view-filter.cc

   1 /*
   2  * Copyright (C) 2006 John Ellis
   3  * Copyright (C) 2008 - 2016 The Geeqie Team
   4  *
   5  * Author: John Ellis
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License along
  18  * with this program; if not, write to the Free Software Foundation, Inc.,
  19  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20  */
  21
  22 #include "pan-view-filter.h"
  23
  24 #include "metadata.h"
  25 #include "pan-view.h"
  26 #include "ui-fileops.h"
  27 #include "ui-tabcomp.h"
  28 #include "ui-misc.h"
  29
  30 PanViewFilterUi *pan_filter_ui_new(PanWindow *pw)
  31 {
  32         auto ui = g_new0(PanViewFilterUi, 1);
  33         GtkWidget *combo;
  34         GtkWidget *hbox;
  35         gint i;
  36
  37         /* Since we're using the GHashTable as a HashSet (in which key and value pointers
  38          * are always identical), specifying key _and_ value destructor callbacks will
  39          * cause a double-free.
  40          */
  41         {
  42                 GtkTreeIter iter;
  43                 ui->filter_mode_model = gtk_list_store_new(3, G_TYPE_INT, G_TYPE_STRING, G_TYPE_STRING);
  44                 gtk_list_store_append(ui->filter_mode_model, &iter);
  45                 gtk_list_store_set(ui->filter_mode_model, &iter,
  46                                    0, PAN_VIEW_FILTER_REQUIRE, 1, _("Require"), 2, _("R"), -1);
  47                 gtk_list_store_append(ui->filter_mode_model, &iter);
  48                 gtk_list_store_set(ui->filter_mode_model, &iter,
  49                                    0, PAN_VIEW_FILTER_EXCLUDE, 1, _("Exclude"), 2, _("E"), -1);
  50                 gtk_list_store_append(ui->filter_mode_model, &iter);
  51                 gtk_list_store_set(ui->filter_mode_model, &iter,
  52                                    0, PAN_VIEW_FILTER_INCLUDE, 1, _("Include"), 2, _("I"), -1);
  53                 gtk_list_store_append(ui->filter_mode_model, &iter);
  54                 gtk_list_store_set(ui->filter_mode_model, &iter,
  55                                    0, PAN_VIEW_FILTER_GROUP, 1, _("Group"), 2, _("G"), -1);
  56
  57                 ui->filter_mode_combo = gtk_combo_box_new_with_model(GTK_TREE_MODEL(ui->filter_mode_model));
  58                 gtk_combo_box_set_focus_on_click(GTK_COMBO_BOX(ui->filter_mode_combo), FALSE);
  59                 gtk_combo_box_set_active(GTK_COMBO_BOX(ui->filter_mode_combo), 0);
  60
  61                 GtkCellRenderer *render = gtk_cell_renderer_text_new();
  62                 gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(ui->filter_mode_combo), render, TRUE);
  63                 gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(ui->filter_mode_combo), render, "text", 1, NULL);
  64         }
  65
  66         // Build the actual filter UI.
  67         ui->filter_box = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_SPACE);
  68         pref_spacer(ui->filter_box, 0);
  69         pref_label_new(ui->filter_box, _("Keyword Filter:"));
  70
  71         gtk_box_pack_start(GTK_BOX(ui->filter_box), ui->filter_mode_combo, FALSE, FALSE, 0);
  72         gtk_widget_show(ui->filter_mode_combo);
  73
  74         hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_SPACE);
  75         gtk_box_pack_start(GTK_BOX(ui->filter_box), hbox, TRUE, TRUE, 0);
  76         gtk_widget_show(hbox);
  77
  78         combo = tab_completion_new_with_history(&ui->filter_entry, "", "pan_view_filter", -1,
  79                                                 pan_filter_activate_cb, pw);
  80         gtk_box_pack_start(GTK_BOX(hbox), combo, TRUE, TRUE, 0);
  81         gtk_widget_show(combo);
  82
  83         ui->filter_label = gtk_label_new("");/** @todo (xsdg): Figure out whether it's useful to keep this label around. */
  84
  85         ui->filter_kw_hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_SPACE);
  86         gtk_box_pack_start(GTK_BOX(hbox), ui->filter_kw_hbox, TRUE, TRUE, 0);
  87         gtk_widget_show(ui->filter_kw_hbox);
  88
  89         // Build the spin-button to show/hide the filter UI.
  90         ui->filter_button = gtk_toggle_button_new();
  91         gtk_button_set_relief(GTK_BUTTON(ui->filter_button), GTK_RELIEF_NONE);
  92         gtk_button_set_focus_on_click(GTK_BUTTON(ui->filter_button), FALSE);
  93         hbox = gtk_box_new(GTK_ORIENTATION_HORIZONTAL, PREF_PAD_GAP);
  94         gtk_container_add(GTK_CONTAINER(ui->filter_button), hbox);
  95         gtk_widget_show(hbox);
  96         ui->filter_button_arrow = gtk_image_new_from_icon_name("pan-up", GTK_ICON_SIZE_BUTTON);
  97         gtk_box_pack_start(GTK_BOX(hbox), ui->filter_button_arrow, FALSE, FALSE, 0);
  98         gtk_widget_show(ui->filter_button_arrow);
  99         pref_label_new(hbox, _("Filter"));
 100
 101         g_signal_connect(G_OBJECT(ui->filter_button), "clicked",
 102                          G_CALLBACK(pan_filter_toggle_cb), pw);
 103
 104         // Add check buttons for filtering by image class
 105         for (i = 0; i < FILE_FORMAT_CLASSES; i++)
 106         {
 107                 ui->filter_check_buttons[i] = gtk_check_button_new_with_label(_(format_class_list[i]));
 108                 gtk_box_pack_start(GTK_BOX(ui->filter_box), ui->filter_check_buttons[i], FALSE, FALSE, 0);
 109                 gtk_widget_show(ui->filter_check_buttons[i]);
 110         }
 111
 112         gtk_toggle_button_set_active(reinterpret_cast<GtkToggleButton *>(ui->filter_check_buttons[FORMAT_CLASS_IMAGE]), TRUE);
 113         gtk_toggle_button_set_active(reinterpret_cast<GtkToggleButton *>(ui->filter_check_buttons[FORMAT_CLASS_RAWIMAGE]), TRUE);
 114         gtk_toggle_button_set_active(reinterpret_cast<GtkToggleButton *>(ui->filter_check_buttons[FORMAT_CLASS_VIDEO]), TRUE);
 115         ui->filter_classes = (1 << FORMAT_CLASS_IMAGE) | (1 << FORMAT_CLASS_RAWIMAGE) | (1 << FORMAT_CLASS_VIDEO);
 116
 117         // Connecting the signal before setting the state causes segfault as pw is not yet prepared
 118         for (i = 0; i < FILE_FORMAT_CLASSES; i++)
 119                 g_signal_connect((GtkToggleButton *)(ui->filter_check_buttons[i]), "toggled", G_CALLBACK(pan_filter_toggle_button_cb), pw);
 120
 121         return ui;
 122 }
 123
 124 void pan_filter_ui_destroy(PanViewFilterUi **ui_ptr)
 125 {
 126         if (ui_ptr == nullptr || *ui_ptr == nullptr) return;
 127
 128         g_free(*ui_ptr);
 129         *ui_ptr = nullptr;
 130 }
 131
 132 static void pan_filter_status(PanWindow *pw, const gchar *text)
 133 {
 134         gtk_label_set_text(GTK_LABEL(pw->filter_ui->filter_label), (text) ? text : "");
 135 }
 136
 137 static void pan_filter_kw_button_cb(GtkButton *widget, gpointer data)
 138 {
 139         auto cb_state = static_cast<PanFilterCallbackState *>(data);
 140         PanWindow *pw = cb_state->pw;
 141         PanViewFilterUi *ui = pw->filter_ui;
 142
 143         /** @todo (xsdg): Fix filter element pointed object memory leak. */
 144         ui->filter_elements = g_list_delete_link(ui->filter_elements, cb_state->filter_element);
 145         gtk_widget_destroy(GTK_WIDGET(widget));
 146         g_free(cb_state);
 147
 148         pan_filter_status(pw, _("Removed keyword…"));
 149         pan_layout_update(pw);
 150 }
 151
 152 void pan_filter_activate_cb(const gchar *text, gpointer data)
 153 {
 154         GtkWidget *kw_button;
 155         auto pw = static_cast<PanWindow *>(data);
 156         PanViewFilterUi *ui = pw->filter_ui;
 157         GtkTreeIter iter;
 158
 159         if (!text) return;
 160
 161         // Get all relevant state and reset UI.
 162         gtk_combo_box_get_active_iter(GTK_COMBO_BOX(ui->filter_mode_combo), &iter);
 163         gtk_entry_set_text(GTK_ENTRY(ui->filter_entry), "");
 164         tab_completion_append_to_history(ui->filter_entry, text);
 165
 166         // Add new filter element.
 167         auto element = g_new0(PanViewFilterElement, 1);
 168         gtk_tree_model_get(GTK_TREE_MODEL(ui->filter_mode_model), &iter, 0, &element->mode, -1);
 169         element->keyword = g_strdup(text);
 170         if (g_strcmp0(text, g_regex_escape_string(text, -1)))
 171                 {
 172                 // It's an actual regex, so compile
 173                 element->kw_regex = g_regex_new(text, static_cast<GRegexCompileFlags>(G_REGEX_ANCHORED | G_REGEX_OPTIMIZE), G_REGEX_MATCH_ANCHORED, nullptr);
 174                 }
 175         ui->filter_elements = g_list_append(ui->filter_elements, element);
 176
 177         // Get the short version of the mode value.
 178         gchar *short_mode;
 179         gtk_tree_model_get(GTK_TREE_MODEL(ui->filter_mode_model), &iter, 2, &short_mode, -1);
 180
 181         // Create the button.
 182         /** @todo (xsdg): Use MVC so that the button list is an actual representation of the GList */
 183         gchar *label = g_strdup_printf("(%s) %s", short_mode, text);
 184         kw_button = gtk_button_new_with_label(label);
 185         g_clear_pointer(&label, g_free);
 186
 187         gtk_box_pack_start(GTK_BOX(ui->filter_kw_hbox), kw_button, FALSE, FALSE, 0);
 188         gtk_widget_show(kw_button);
 189
 190         auto cb_state = g_new0(PanFilterCallbackState, 1);
 191         cb_state->pw = pw;
 192         cb_state->filter_element = g_list_last(ui->filter_elements);
 193
 194         g_signal_connect(G_OBJECT(kw_button), "clicked",
 195                          G_CALLBACK(pan_filter_kw_button_cb), cb_state);
 196
 197         pan_layout_update(pw);
 198 }
 199
 200 #pragma GCC diagnostic push
 201 #pragma GCC diagnostic ignored "-Wunused-function"
 202 void pan_filter_activate_unused(PanWindow *pw)
 203 {
 204         gchar *text;
 205
 206         text = g_strdup(gtk_entry_get_text(GTK_ENTRY(pw->filter_ui->filter_entry)));
 207         pan_filter_activate_cb(text, pw);
 208         g_free(text);
 209 }
 210 #pragma GCC diagnostic pop
 211
 212 void pan_filter_toggle_cb(GtkWidget *button, gpointer data)
 213 {
 214         auto pw = static_cast<PanWindow *>(data);
 215         PanViewFilterUi *ui = pw->filter_ui;
 216         gboolean visible;
 217         GtkWidget *parent;
 218
 219         visible = gtk_widget_get_visible(ui->filter_box);
 220         if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button)) == visible) return;
 221
 222         if (visible)
 223                 {
 224                 gtk_widget_hide(ui->filter_box);
 225
 226                 parent = gtk_widget_get_parent(ui->filter_button_arrow);
 227
 228                 gtk_widget_destroy(ui->filter_button_arrow);
 229                 ui->filter_button_arrow = gtk_image_new_from_icon_name("pan-up", GTK_ICON_SIZE_BUTTON);
 230
 231                 gtk_box_pack_start(GTK_BOX(parent), ui->filter_button_arrow, FALSE, FALSE, 0);
 232                 gtk_box_reorder_child(GTK_BOX(parent), ui->filter_button_arrow, 0);
 233
 234                 gtk_widget_show(ui->filter_button_arrow);
 235                 }
 236         else
 237                 {
 238                 gtk_widget_show(ui->filter_box);
 239
 240                 parent = gtk_widget_get_parent(ui->filter_button_arrow);
 241
 242                 gtk_widget_destroy(ui->filter_button_arrow);
 243                 ui->filter_button_arrow = gtk_image_new_from_icon_name("pan-down", GTK_ICON_SIZE_BUTTON);
 244
 245                 gtk_box_pack_start(GTK_BOX(parent), ui->filter_button_arrow, FALSE, FALSE, 0);
 246                 gtk_box_reorder_child(GTK_BOX(parent), ui->filter_button_arrow, 0);
 247
 248                 gtk_widget_show(ui->filter_button_arrow);
 249                 gtk_widget_grab_focus(ui->filter_entry);
 250                 }
 251 }
 252
 253 #pragma GCC diagnostic push
 254 #pragma GCC diagnostic ignored "-Wunused-function"
 255 void pan_filter_toggle_visible_unused(PanWindow *pw, gboolean enable)
 256 {
 257         PanViewFilterUi *ui = pw->filter_ui;
 258         if (pw->fs) return;
 259
 260         if (enable)
 261                 {
 262                 if (gtk_widget_get_visible(ui->filter_box))
 263                         {
 264                         gtk_widget_grab_focus(ui->filter_entry);
 265                         }
 266                 else
 267                         {
 268                         gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ui->filter_button), TRUE);
 269                         }
 270                 }
 271         else
 272                 {
 273                 if (gtk_widget_get_visible(ui->filter_entry))
 274                         {
 275                         if (gtk_widget_has_focus(ui->filter_entry))
 276                                 {
 277                                 gtk_widget_grab_focus(GTK_WIDGET(pw->imd->widget));
 278                                 }
 279                         gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ui->filter_button), FALSE);
 280                         }
 281                 }
 282 }
 283 #pragma GCC diagnostic pop
 284
 285 void pan_filter_toggle_button_cb(GtkWidget *UNUSED(button), gpointer data)
 286 {
 287         auto pw = static_cast<PanWindow *>(data);
 288         PanViewFilterUi *ui = pw->filter_ui;
 289
 290         gint old_classes = ui->filter_classes;
 291         ui->filter_classes = 0;
 292
 293         for (gint i = 0; i < FILE_FORMAT_CLASSES; i++)
 294         {
 295                 ui->filter_classes |= gtk_toggle_button_get_active(reinterpret_cast<GtkToggleButton *>(ui->filter_check_buttons[i])) ? 1 << i : 0;
 296         }
 297
 298         if (ui->filter_classes != old_classes)
 299                 pan_layout_update(pw);
 300 }
 301
 302 static gboolean pan_view_list_contains_kw_pattern(GList *haystack, PanViewFilterElement *filter, gchar **found_kw)
 303 {
 304         if (filter->kw_regex)
 305                 {
 306                 // regex compile succeeded; attempt regex match.
 307                 GList *work = g_list_first(haystack);
 308                 while (work)
 309                         {
 310                         auto keyword = static_cast<gchar *>(work->data);
 311                         work = work->next;
 312                         if (g_regex_match(filter->kw_regex, keyword, static_cast<GRegexMatchFlags>(0), nullptr))
 313                                 {
 314                                 if (found_kw) *found_kw = keyword;
 315                                 return TRUE;
 316                                 }
 317                         }
 318                 return FALSE;
 319                 }
 320         else
 321                 {
 322                 // regex compile failed; fall back to exact string match.
 323                 GList *found_elem = g_list_find_custom(haystack, filter->keyword, reinterpret_cast<GCompareFunc>(g_strcmp0));
 324                 if (found_elem && found_kw) *found_kw = static_cast<gchar *>(found_elem->data);
 325                 return !!found_elem;
 326                 }
 327 }
 328
 329 gboolean pan_filter_fd_list(GList **fd_list, GList *filter_elements, gint filter_classes)
 330 {
 331         GList *work;
 332         gboolean modified = FALSE;
 333         GHashTable *seen_kw_table = nullptr;
 334
 335         if (!fd_list || !*fd_list) return modified;
 336
 337         // seen_kw_table is only valid in this scope, so don't take ownership of any strings.
 338         if (filter_elements)
 339                 seen_kw_table = g_hash_table_new_full(g_str_hash, g_str_equal, nullptr, nullptr);
 340
 341         work = *fd_list;
 342         while (work)
 343                 {
 344                 auto fd = static_cast<FileData *>(work->data);
 345                 GList *last_work = work;
 346                 work = work->next;
 347
 348                 gboolean should_reject = FALSE;
 349                 gchar *group_kw = nullptr;
 350
 351                 if (!((1 << fd -> format_class) & filter_classes))
 352                         {
 353                         should_reject = TRUE;
 354                         }
 355                 else if (filter_elements)
 356                         {
 357                         /** @todo (xsdg): OPTIMIZATION Do the search inside of metadata.cc to avoid a bunch of string list copies. */
 358                         GList *img_keywords = metadata_read_list(fd, KEYWORD_KEY, METADATA_PLAIN);
 359
 360                         /** @todo (xsdg): OPTIMIZATION Determine a heuristic for when to linear-search the keywords list, and when to build a hash table for the image's keywords. */
 361                         GList *filter_element = filter_elements;
 362
 363                         while (filter_element)
 364                                 {
 365                                 auto filter = static_cast<PanViewFilterElement *>(filter_element->data);
 366                                 filter_element = filter_element->next;
 367                                 gchar *found_kw = nullptr;
 368                                 gboolean has_kw = pan_view_list_contains_kw_pattern(img_keywords, filter, &found_kw);
 369
 370                                 switch (filter->mode)
 371                                         {
 372                                         case PAN_VIEW_FILTER_REQUIRE:
 373                                                 should_reject |= !has_kw;
 374                                                 break;
 375                                         case PAN_VIEW_FILTER_EXCLUDE:
 376                                                 should_reject |= has_kw;
 377                                                 break;
 378                                         case PAN_VIEW_FILTER_INCLUDE:
 379                                                 if (has_kw) should_reject = FALSE;
 380                                                 break;
 381                                         case PAN_VIEW_FILTER_GROUP:
 382                                                 if (has_kw)
 383                                                         {
 384                                                         if (g_hash_table_contains(seen_kw_table, found_kw))
 385                                                                 {
 386                                                                 should_reject = TRUE;
 387                                                                 }
 388                                                         else if (group_kw == nullptr)
 389                                                                 {
 390                                                                 group_kw = found_kw;
 391                                                                 }
 392                                                         }
 393                                                 break;
 394                                         }
 395                                 }
 396                         g_list_free_full(img_keywords, g_free);
 397                         if (!should_reject && group_kw != nullptr) g_hash_table_add(seen_kw_table, group_kw);
 398                         group_kw = nullptr;  // group_kw references an item from img_keywords.
 399                         }
 400
 401                 if (should_reject)
 402                         {
 403                         *fd_list = g_list_delete_link(*fd_list, last_work);
 404                         modified = TRUE;
 405                         }
 406                 }
 407
 408         if (filter_elements)
 409                 g_hash_table_destroy(seen_kw_table);
 410
 411         return modified;
 412 }