src/pan-view/pan-view-filter.c

   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 "image.h"
  25 #include "metadata.h"
  26 #include "pan-item.h"
  27 #include "pan-util.h"
  28 #include "pan-view.h"
  29 #include "ui_fileops.h"
  30 #include "ui_tabcomp.h"
  31 #include "ui_misc.h"
  32
  33 PanViewFilterUi *pan_filter_ui_new(PanWindow *pw)
  34 {
  35         PanViewFilterUi *ui = g_new0(PanViewFilterUi, 1);
  36         GtkWidget *combo;
  37         GtkWidget *hbox;
  38         gint i;
  39
  40         /* Since we're using the GHashTable as a HashSet (in which key and value pointers
  41          * are always identical), specifying key _and_ value destructor callbacks will
  42          * cause a double-free.
  43          */
  44         {
  45                 GtkTreeIter iter;
  46                 ui->filter_mode_model = gtk_list_store_new(3, G_TYPE_INT, G_TYPE_STRING, G_TYPE_STRING);
  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_REQUIRE, 1, _("Require"), 2, _("R"), -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_EXCLUDE, 1, _("Exclude"), 2, _("E"), -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_INCLUDE, 1, _("Include"), 2, _("I"), -1);
  56                 gtk_list_store_append(ui->filter_mode_model, &iter);
  57                 gtk_list_store_set(ui->filter_mode_model, &iter,
  58                                    0, PAN_VIEW_FILTER_GROUP, 1, _("Group"), 2, _("G"), -1);
  59
  60                 ui->filter_mode_combo = gtk_combo_box_new_with_model(GTK_TREE_MODEL(ui->filter_mode_model));
  61                 gtk_combo_box_set_focus_on_click(GTK_COMBO_BOX(ui->filter_mode_combo), FALSE);
  62                 gtk_combo_box_set_active(GTK_COMBO_BOX(ui->filter_mode_combo), 0);
  63
  64                 GtkCellRenderer *render = gtk_cell_renderer_text_new();
  65                 gtk_cell_layout_pack_start(GTK_CELL_LAYOUT(ui->filter_mode_combo), render, TRUE);
  66                 gtk_cell_layout_set_attributes(GTK_CELL_LAYOUT(ui->filter_mode_combo), render, "text", 1, NULL);
  67         }
  68
  69         // Build the actual filter UI.
  70         ui->filter_box = gtk_hbox_new(FALSE, PREF_PAD_SPACE);
  71         pref_spacer(ui->filter_box, 0);
  72         pref_label_new(ui->filter_box, _("Keyword Filter:"));
  73
  74         gtk_box_pack_start(GTK_BOX(ui->filter_box), ui->filter_mode_combo, FALSE, FALSE, 0);
  75         gtk_widget_show(ui->filter_mode_combo);
  76
  77         hbox = gtk_hbox_new(TRUE, PREF_PAD_SPACE);
  78         gtk_box_pack_start(GTK_BOX(ui->filter_box), hbox, TRUE, TRUE, 0);
  79         gtk_widget_show(hbox);
  80
  81         combo = tab_completion_new_with_history(&ui->filter_entry, "", "pan_view_filter", -1,
  82                                                 pan_filter_activate_cb, pw);
  83         gtk_box_pack_start(GTK_BOX(hbox), combo, TRUE, TRUE, 0);
  84         gtk_widget_show(combo);
  85
  86         ui->filter_label = gtk_label_new("");/** @todo (xsdg): Figure out whether it's useful to keep this label around. */
  87         //gtk_box_pack_start(GTK_BOX(hbox), ui->filter_label, FALSE, FALSE, 0);
  88         //gtk_widget_show(ui->filter_label);
  89
  90         ui->filter_kw_hbox = gtk_hbox_new(FALSE, PREF_PAD_SPACE);
  91         gtk_box_pack_start(GTK_BOX(hbox), ui->filter_kw_hbox, TRUE, TRUE, 0);
  92         gtk_widget_show(ui->filter_kw_hbox);
  93
  94         // Build the spin-button to show/hide the filter UI.
  95         ui->filter_button = gtk_toggle_button_new();
  96         gtk_button_set_relief(GTK_BUTTON(ui->filter_button), GTK_RELIEF_NONE);
  97         gtk_button_set_focus_on_click(GTK_BUTTON(ui->filter_button), FALSE);
  98         hbox = gtk_hbox_new(FALSE, PREF_PAD_GAP);
  99         gtk_container_add(GTK_CONTAINER(ui->filter_button), hbox);
 100         gtk_widget_show(hbox);
 101         ui->filter_button_arrow = gtk_arrow_new(GTK_ARROW_UP, GTK_SHADOW_NONE);
 102         gtk_box_pack_start(GTK_BOX(hbox), ui->filter_button_arrow, FALSE, FALSE, 0);
 103         gtk_widget_show(ui->filter_button_arrow);
 104         pref_label_new(hbox, _("Filter"));
 105
 106         g_signal_connect(G_OBJECT(ui->filter_button), "clicked",
 107                          G_CALLBACK(pan_filter_toggle_cb), pw);
 108
 109         // Add check buttons for filtering by image class
 110         for (i = 0; i < FILE_FORMAT_CLASSES; i++)
 111         {
 112                 ui->filter_check_buttons[i] = gtk_check_button_new_with_label(_(format_class_list[i]));
 113                 gtk_box_pack_start(GTK_BOX(ui->filter_box), ui->filter_check_buttons[i], FALSE, FALSE, 0);
 114                 gtk_widget_show(ui->filter_check_buttons[i]);
 115         }
 116
 117         gtk_toggle_button_set_active((GtkToggleButton *)ui->filter_check_buttons[FORMAT_CLASS_IMAGE], TRUE);
 118         gtk_toggle_button_set_active((GtkToggleButton *)ui->filter_check_buttons[FORMAT_CLASS_RAWIMAGE], TRUE);
 119         gtk_toggle_button_set_active((GtkToggleButton *)ui->filter_check_buttons[FORMAT_CLASS_VIDEO], TRUE);
 120         ui->filter_classes = (1 << FORMAT_CLASS_IMAGE) | (1 << FORMAT_CLASS_RAWIMAGE) | (1 << FORMAT_CLASS_VIDEO);
 121
 122         // Connecting the signal before setting the state causes segfault as pw is not yet prepared
 123         for (i = 0; i < FILE_FORMAT_CLASSES; i++)
 124                 g_signal_connect((GtkToggleButton *)(ui->filter_check_buttons[i]), "toggled", G_CALLBACK(pan_filter_toggle_button_cb), pw);
 125
 126         return ui;
 127 }
 128
 129 void pan_filter_ui_destroy(PanViewFilterUi **ui_ptr)
 130 {
 131         if (ui_ptr == NULL || *ui_ptr == NULL) return;
 132
 133         // Note that g_clear_pointer handles already-NULL pointers.
 134         //g_clear_pointer(&(*ui_ptr)->filter_kw_table, g_hash_table_destroy);
 135
 136         g_free(*ui_ptr);
 137         *ui_ptr = NULL;
 138 }
 139
 140 static void pan_filter_status(PanWindow *pw, const gchar *text)
 141 {
 142         gtk_label_set_text(GTK_LABEL(pw->filter_ui->filter_label), (text) ? text : "");
 143 }
 144
 145 static void pan_filter_kw_button_cb(GtkButton *widget, gpointer data)
 146 {
 147         PanFilterCallbackState *cb_state = data;
 148         PanWindow *pw = cb_state->pw;
 149         PanViewFilterUi *ui = pw->filter_ui;
 150
 151         /** @todo (xsdg): Fix filter element pointed object memory leak. */
 152         ui->filter_elements = g_list_delete_link(ui->filter_elements, cb_state->filter_element);
 153         gtk_widget_destroy(GTK_WIDGET(widget));
 154         g_free(cb_state);
 155
 156         pan_filter_status(pw, _("Removed keyword…"));
 157         pan_layout_update(pw);
 158 }
 159
 160 void pan_filter_activate_cb(const gchar *text, gpointer data)
 161 {
 162         GtkWidget *kw_button;
 163         PanWindow *pw = data;
 164         PanViewFilterUi *ui = pw->filter_ui;
 165         GtkTreeIter iter;
 166
 167         if (!text) return;
 168
 169         // Get all relevant state and reset UI.
 170         gtk_combo_box_get_active_iter(GTK_COMBO_BOX(ui->filter_mode_combo), &iter);
 171         gtk_entry_set_text(GTK_ENTRY(ui->filter_entry), "");
 172         tab_completion_append_to_history(ui->filter_entry, text);
 173
 174         // Add new filter element.
 175         PanViewFilterElement *element = g_new0(PanViewFilterElement, 1);
 176         gtk_tree_model_get(GTK_TREE_MODEL(ui->filter_mode_model), &iter, 0, &element->mode, -1);
 177         element->keyword = g_strdup(text);
 178         if (g_strcmp0(text, g_regex_escape_string(text, -1)))
 179                 {
 180                 // It's an actual regex, so compile
 181                 element->kw_regex = g_regex_new(text, G_REGEX_ANCHORED | G_REGEX_OPTIMIZE, G_REGEX_MATCH_ANCHORED, NULL);
 182                 }
 183         ui->filter_elements = g_list_append(ui->filter_elements, element);
 184
 185         // Get the short version of the mode value.
 186         gchar *short_mode;
 187         gtk_tree_model_get(GTK_TREE_MODEL(ui->filter_mode_model), &iter, 2, &short_mode, -1);
 188
 189         // Create the button.
 190         /** @todo (xsdg): Use MVC so that the button list is an actual representation of the GList */
 191         gchar *label = g_strdup_printf("(%s) %s", short_mode, text);
 192         kw_button = gtk_button_new_with_label(label);
 193         g_clear_pointer(&label, g_free);
 194
 195         gtk_box_pack_start(GTK_BOX(ui->filter_kw_hbox), kw_button, FALSE, FALSE, 0);
 196         gtk_widget_show(kw_button);
 197
 198         PanFilterCallbackState *cb_state = g_new0(PanFilterCallbackState, 1);
 199         cb_state->pw = pw;
 200         cb_state->filter_element = g_list_last(ui->filter_elements);
 201
 202         g_signal_connect(G_OBJECT(kw_button), "clicked",
 203                          G_CALLBACK(pan_filter_kw_button_cb), cb_state);
 204
 205         pan_layout_update(pw);
 206 }
 207
 208 void pan_filter_activate(PanWindow *pw)
 209 {
 210         gchar *text;
 211
 212         text = g_strdup(gtk_entry_get_text(GTK_ENTRY(pw->filter_ui->filter_entry)));
 213         pan_filter_activate_cb(text, pw);
 214         g_free(text);
 215 }
 216
 217 void pan_filter_toggle_cb(GtkWidget *button, gpointer data)
 218 {
 219         PanWindow *pw = data;
 220         PanViewFilterUi *ui = pw->filter_ui;
 221         gboolean visible;
 222
 223         visible = gtk_widget_get_visible(ui->filter_box);
 224         if (gtk_toggle_button_get_active(GTK_TOGGLE_BUTTON(button)) == visible) return;
 225
 226         if (visible)
 227                 {
 228                 gtk_widget_hide(ui->filter_box);
 229                 gtk_arrow_set(GTK_ARROW(ui->filter_button_arrow), GTK_ARROW_UP, GTK_SHADOW_NONE);
 230                 }
 231         else
 232                 {
 233                 gtk_widget_show(ui->filter_box);
 234                 gtk_arrow_set(GTK_ARROW(ui->filter_button_arrow), GTK_ARROW_DOWN, GTK_SHADOW_NONE);
 235                 gtk_widget_grab_focus(ui->filter_entry);
 236                 }
 237 }
 238
 239 void pan_filter_toggle_visible(PanWindow *pw, gboolean enable)
 240 {
 241         PanViewFilterUi *ui = pw->filter_ui;
 242         if (pw->fs) return;
 243
 244         if (enable)
 245                 {
 246                 if (gtk_widget_get_visible(ui->filter_box))
 247                         {
 248                         gtk_widget_grab_focus(ui->filter_entry);
 249                         }
 250                 else
 251                         {
 252                         gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ui->filter_button), TRUE);
 253                         }
 254                 }
 255         else
 256                 {
 257                 if (gtk_widget_get_visible(ui->filter_entry))
 258                         {
 259                         if (gtk_widget_has_focus(ui->filter_entry))
 260                                 {
 261                                 gtk_widget_grab_focus(GTK_WIDGET(pw->imd->widget));
 262                                 }
 263                         gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(ui->filter_button), FALSE);
 264                         }
 265                 }
 266 }
 267
 268 void pan_filter_toggle_button_cb(GtkWidget *button, gpointer data)
 269 {
 270         PanWindow *pw = data;
 271         PanViewFilterUi *ui = pw->filter_ui;
 272
 273         gint old_classes = ui->filter_classes;
 274         ui->filter_classes = 0;
 275
 276         for (gint i = 0; i < FILE_FORMAT_CLASSES; i++)
 277         {
 278                 ui->filter_classes |= gtk_toggle_button_get_active((GtkToggleButton *)ui->filter_check_buttons[i]) ? 1 << i : 0;
 279         }
 280
 281         if (ui->filter_classes != old_classes)
 282                 pan_layout_update(pw);
 283 }
 284
 285 static gboolean pan_view_list_contains_kw_pattern(GList *haystack, PanViewFilterElement *filter, gchar **found_kw)
 286 {
 287         if (filter->kw_regex)
 288                 {
 289                 // regex compile succeeded; attempt regex match.
 290                 GList *work = g_list_first(haystack);
 291                 while (work)
 292                         {
 293                         gchar *keyword = work->data;
 294                         work = work->next;
 295                         if (g_regex_match(filter->kw_regex, keyword, 0x0, NULL))
 296                                 {
 297                                 if (found_kw) *found_kw = keyword;
 298                                 return TRUE;
 299                                 }
 300                         }
 301                 return FALSE;
 302                 }
 303         else
 304                 {
 305                 // regex compile failed; fall back to exact string match.
 306                 GList *found_elem = g_list_find_custom(haystack, filter->keyword, (GCompareFunc)g_strcmp0);
 307                 if (found_elem && found_kw) *found_kw = found_elem->data;
 308                 return !!found_elem;
 309                 }
 310 }
 311
 312 gboolean pan_filter_fd_list(GList **fd_list, GList *filter_elements, gint filter_classes)
 313 {
 314         GList *work;
 315         gboolean modified = FALSE;
 316         GHashTable *seen_kw_table = NULL;
 317
 318         if (!fd_list || !*fd_list) return modified;
 319
 320         // seen_kw_table is only valid in this scope, so don't take ownership of any strings.
 321         if (filter_elements)
 322                 seen_kw_table = g_hash_table_new_full(g_str_hash, g_str_equal, NULL, NULL);
 323
 324         work = *fd_list;
 325         while (work)
 326                 {
 327                 FileData *fd = work->data;
 328                 GList *last_work = work;
 329                 work = work->next;
 330
 331                 gboolean should_reject = FALSE;
 332                 gchar *group_kw = NULL;
 333
 334                 if (!((1 << fd -> format_class) & filter_classes))
 335                         {
 336                         should_reject = TRUE;
 337                         }
 338                 else if (filter_elements)
 339                         {
 340                         /** @todo (xsdg): OPTIMIZATION Do the search inside of metadata.c to avoid a bunch of string list copies. */
 341                         GList *img_keywords = metadata_read_list(fd, KEYWORD_KEY, METADATA_PLAIN);
 342
 343                         /** @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. */
 344                         GList *filter_element = filter_elements;
 345
 346                         while (filter_element)
 347                                 {
 348                                 PanViewFilterElement *filter = filter_element->data;
 349                                 filter_element = filter_element->next;
 350                                 gchar *found_kw = NULL;
 351                                 gboolean has_kw = pan_view_list_contains_kw_pattern(img_keywords, filter, &found_kw);
 352
 353                                 switch (filter->mode)
 354                                         {
 355                                         case PAN_VIEW_FILTER_REQUIRE:
 356                                                 should_reject |= !has_kw;
 357                                                 break;
 358                                         case PAN_VIEW_FILTER_EXCLUDE:
 359                                                 should_reject |= has_kw;
 360                                                 break;
 361                                         case PAN_VIEW_FILTER_INCLUDE:
 362                                                 if (has_kw) should_reject = FALSE;
 363                                                 break;
 364                                         case PAN_VIEW_FILTER_GROUP:
 365                                                 if (has_kw)
 366                                                         {
 367                                                         if (g_hash_table_contains(seen_kw_table, found_kw))
 368                                                                 {
 369                                                                 should_reject = TRUE;
 370                                                                 }
 371                                                         else if (group_kw == NULL)
 372                                                                 {
 373                                                                 group_kw = found_kw;
 374                                                                 }
 375                                                         }
 376                                                 break;
 377                                         }
 378                                 }
 379                         string_list_free(img_keywords);
 380                         if (!should_reject && group_kw != NULL) g_hash_table_add(seen_kw_table, group_kw);
 381                         group_kw = NULL;  // group_kw references an item from img_keywords.
 382                         }
 383
 384                 if (should_reject)
 385                         {
 386                         *fd_list = g_list_delete_link(*fd_list, last_work);
 387                         modified = TRUE;
 388                         }
 389                 }
 390
 391         if (filter_elements)
 392                 g_hash_table_destroy(seen_kw_table);
 393
 394         return modified;
 395 }