| 1 | /* |
| 2 | * This file is part of DisOrder |
| 3 | * Copyright (C) 2008 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 18 | * USA |
| 19 | */ |
| 20 | /** @file disobedience/choose.c |
| 21 | * @brief Hierarchical track selection and search |
| 22 | * |
| 23 | * We now use an ordinary GtkTreeStore/GtkTreeView. |
| 24 | * |
| 25 | * We have an extra column with per-row data. This isn't referenced from |
| 26 | * anywhere the GC can see so explicit memory management is required. |
| 27 | * (TODO perhaps we could fix this using a gobject?) |
| 28 | * |
| 29 | * We don't want to pull the entire tree in memory, but we want directories to |
| 30 | * show up as having children. Therefore we give directories a placeholder |
| 31 | * child and replace their children when they are opened. Placeholders have a |
| 32 | * null choosedata pointer. |
| 33 | * |
| 34 | * TODO We do a period sweep which kills contracted nodes, putting back |
| 35 | * placeholders, and updating expanded nodes to keep up with server-side |
| 36 | * changes. (We could trigger the latter off rescan complete notifications?) |
| 37 | * |
| 38 | * TODO: |
| 39 | * - sweep up contracted nodes |
| 40 | * - update when content may have changed (e.g. after a rescan) |
| 41 | * - popup menu (partially implemented now) |
| 42 | * - playing state |
| 43 | * - display length of tracks |
| 44 | */ |
| 45 | |
| 46 | #include "disobedience.h" |
| 47 | #include "choose.h" |
| 48 | |
| 49 | /** @brief The current selection tree */ |
| 50 | GtkTreeStore *choose_store; |
| 51 | |
| 52 | /** @brief The view onto the selection tree */ |
| 53 | GtkWidget *choose_view; |
| 54 | |
| 55 | /** @brief The selection tree's selection */ |
| 56 | GtkTreeSelection *choose_selection; |
| 57 | |
| 58 | /** @brief Map choosedata types to names */ |
| 59 | static const char *const choose_type_map[] = { "track", "dir" }; |
| 60 | |
| 61 | /** @brief Return the choosedata given an interator */ |
| 62 | struct choosedata *choose_iter_to_data(GtkTreeIter *iter) { |
| 63 | GValue v[1]; |
| 64 | memset(v, 0, sizeof v); |
| 65 | gtk_tree_model_get_value(GTK_TREE_MODEL(choose_store), iter, CHOOSEDATA_COLUMN, v); |
| 66 | assert(G_VALUE_TYPE(v) == G_TYPE_POINTER); |
| 67 | struct choosedata *const cd = g_value_get_pointer(v); |
| 68 | g_value_unset(v); |
| 69 | return cd; |
| 70 | } |
| 71 | |
| 72 | /** @brief Remove node @p it and all its children |
| 73 | * @param Iterator, updated to point to next |
| 74 | * @return True if iterator remains valid |
| 75 | */ |
| 76 | static gboolean choose_remove_node(GtkTreeIter *it) { |
| 77 | GtkTreeIter child[1]; |
| 78 | gboolean childv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store), |
| 79 | child, |
| 80 | it); |
| 81 | while(childv) |
| 82 | childv = choose_remove_node(child); |
| 83 | struct choosedata *cd = choose_iter_to_data(it); |
| 84 | if(cd) { |
| 85 | g_free(cd->track); |
| 86 | g_free(cd->sort); |
| 87 | g_free(cd); |
| 88 | } |
| 89 | return gtk_tree_store_remove(choose_store, it); |
| 90 | } |
| 91 | |
| 92 | /** @brief (Re-)populate a node |
| 93 | * @param parent_ref Node to populate or NULL to fill root |
| 94 | * @param nvec Number of children to add |
| 95 | * @param vec Children |
| 96 | * @param dirs True if children are directories |
| 97 | * |
| 98 | * Adjusts the set of files (or directories) below @p parent_ref to match those |
| 99 | * listed in @p nvec and @p vec. |
| 100 | * |
| 101 | * @parent_ref will be destroyed. |
| 102 | */ |
| 103 | static void choose_populate(GtkTreeRowReference *parent_ref, |
| 104 | int nvec, char **vec, |
| 105 | int type) { |
| 106 | /* Compute parent_* */ |
| 107 | GtkTreeIter pit[1], *parent_it; |
| 108 | GtkTreePath *parent_path; |
| 109 | if(parent_ref) { |
| 110 | parent_path = gtk_tree_row_reference_get_path(parent_ref); |
| 111 | parent_it = pit; |
| 112 | gboolean pitv = gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store), |
| 113 | pit, parent_path); |
| 114 | assert(pitv); |
| 115 | /*fprintf(stderr, "choose_populate %s: parent path is [%s]\n", |
| 116 | choose_type_map[type], |
| 117 | gtk_tree_path_to_string(parent_path));*/ |
| 118 | } else { |
| 119 | parent_path = 0; |
| 120 | parent_it = 0; |
| 121 | /*fprintf(stderr, "choose_populate %s: populating the root\n", |
| 122 | choose_type_map[type]);*/ |
| 123 | } |
| 124 | /* Remove unwanted nodes and find out which we must add */ |
| 125 | //fprintf(stderr, " trimming unwanted %s nodes\n", choose_type_map[type]); |
| 126 | char *found = xmalloc(nvec); |
| 127 | GtkTreeIter it[1]; |
| 128 | gboolean itv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store), |
| 129 | it, |
| 130 | parent_it); |
| 131 | while(itv) { |
| 132 | struct choosedata *cd = choose_iter_to_data(it); |
| 133 | int keep; |
| 134 | |
| 135 | if(!cd) { |
| 136 | /* Always kill placeholders */ |
| 137 | //fprintf(stderr, " kill a placeholder\n"); |
| 138 | keep = 0; |
| 139 | } else if(cd->type == type) { |
| 140 | /* This is the type we care about */ |
| 141 | //fprintf(stderr, " %s is a %s\n", cd->track, choose_type_map[cd->type]); |
| 142 | int n; |
| 143 | for(n = 0; n < nvec && strcmp(vec[n], cd->track); ++n) |
| 144 | ; |
| 145 | if(n < nvec) { |
| 146 | //fprintf(stderr, " ... and survives\n"); |
| 147 | found[n] = 1; |
| 148 | keep = 1; |
| 149 | } else { |
| 150 | //fprintf(stderr, " ... and is to be removed\n"); |
| 151 | keep = 0; |
| 152 | } |
| 153 | } else { |
| 154 | /* Keep wrong-type entries */ |
| 155 | //fprintf(stderr, " %s is a %s\n", cd->track, choose_type_map[cd->type]); |
| 156 | keep = 1; |
| 157 | } |
| 158 | if(keep) |
| 159 | itv = gtk_tree_model_iter_next(GTK_TREE_MODEL(choose_store), it); |
| 160 | else |
| 161 | itv = choose_remove_node(it); |
| 162 | } |
| 163 | /* Add nodes we don't have */ |
| 164 | int inserted = 0; |
| 165 | //fprintf(stderr, " inserting new %s nodes\n", choose_type_map[type]); |
| 166 | for(int n = 0; n < nvec; ++n) { |
| 167 | if(!found[n]) { |
| 168 | //fprintf(stderr, " %s was not found\n", vec[n]); |
| 169 | struct choosedata *cd = g_malloc0(sizeof *cd); |
| 170 | cd->type = type; |
| 171 | cd->track = g_strdup(vec[n]); |
| 172 | cd->sort = g_strdup(trackname_transform(choose_type_map[type], |
| 173 | vec[n], |
| 174 | "sort")); |
| 175 | gtk_tree_store_append(choose_store, it, parent_it); |
| 176 | gtk_tree_store_set(choose_store, it, |
| 177 | NAME_COLUMN, trackname_transform(choose_type_map[type], |
| 178 | vec[n], |
| 179 | "display"), |
| 180 | CHOOSEDATA_COLUMN, cd, |
| 181 | -1); |
| 182 | ++inserted; |
| 183 | /* If we inserted a directory, insert a placeholder too, so it appears to |
| 184 | * have children; it will be deleted when we expand the directory. */ |
| 185 | if(type == CHOOSE_DIRECTORY) { |
| 186 | //fprintf(stderr, " inserting a placeholder\n"); |
| 187 | GtkTreeIter placeholder[1]; |
| 188 | |
| 189 | gtk_tree_store_append(choose_store, placeholder, it); |
| 190 | gtk_tree_store_set(choose_store, placeholder, |
| 191 | NAME_COLUMN, "Waddling...", |
| 192 | CHOOSEDATA_COLUMN, (void *)0, |
| 193 | -1); |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | //fprintf(stderr, " %d nodes inserted\n", inserted); |
| 198 | if(inserted) { |
| 199 | /* TODO sort the children */ |
| 200 | } |
| 201 | if(parent_ref) { |
| 202 | /* If we deleted a placeholder then we must re-expand the row */ |
| 203 | gtk_tree_view_expand_row(GTK_TREE_VIEW(choose_view), parent_path, FALSE); |
| 204 | gtk_tree_row_reference_free(parent_ref); |
| 205 | gtk_tree_path_free(parent_path); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | static void choose_dirs_completed(void *v, |
| 210 | const char *error, |
| 211 | int nvec, char **vec) { |
| 212 | if(error) { |
| 213 | popup_protocol_error(0, error); |
| 214 | return; |
| 215 | } |
| 216 | choose_populate(v, nvec, vec, CHOOSE_DIRECTORY); |
| 217 | } |
| 218 | |
| 219 | static void choose_files_completed(void *v, |
| 220 | const char *error, |
| 221 | int nvec, char **vec) { |
| 222 | if(error) { |
| 223 | popup_protocol_error(0, error); |
| 224 | return; |
| 225 | } |
| 226 | choose_populate(v, nvec, vec, CHOOSE_FILE); |
| 227 | } |
| 228 | |
| 229 | static void choose_row_expanded(GtkTreeView attribute((unused)) *treeview, |
| 230 | GtkTreeIter *iter, |
| 231 | GtkTreePath *path, |
| 232 | gpointer attribute((unused)) user_data) { |
| 233 | /*fprintf(stderr, "row-expanded path=[%s]\n", |
| 234 | gtk_tree_path_to_string(path));*/ |
| 235 | /* We update a node's contents whenever it is expanded, even if it was |
| 236 | * already populated; the effect is that contracting and expanding a node |
| 237 | * suffices to update it to the latest state on the server. */ |
| 238 | struct choosedata *cd = choose_iter_to_data(iter); |
| 239 | disorder_eclient_files(client, choose_files_completed, |
| 240 | xstrdup(cd->track), |
| 241 | NULL, |
| 242 | gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store), |
| 243 | path)); |
| 244 | disorder_eclient_dirs(client, choose_dirs_completed, |
| 245 | xstrdup(cd->track), |
| 246 | NULL, |
| 247 | gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store), |
| 248 | path)); |
| 249 | /* The row references are destroyed in the _completed handlers. */ |
| 250 | } |
| 251 | |
| 252 | /** @brief Create the choose tab */ |
| 253 | GtkWidget *choose_widget(void) { |
| 254 | /* Create the tree store. */ |
| 255 | choose_store = gtk_tree_store_new(1 + CHOOSEDATA_COLUMN, |
| 256 | G_TYPE_STRING, |
| 257 | G_TYPE_POINTER); |
| 258 | |
| 259 | /* Create the view */ |
| 260 | choose_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(choose_store)); |
| 261 | |
| 262 | /* Create cell renderers and columns */ |
| 263 | GtkCellRenderer *r = gtk_cell_renderer_text_new(); |
| 264 | GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes |
| 265 | ("Track", |
| 266 | r, |
| 267 | "text", 0, |
| 268 | (char *)0); |
| 269 | gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c); |
| 270 | |
| 271 | /* The selection should support multiple things being selected */ |
| 272 | choose_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(choose_view)); |
| 273 | gtk_tree_selection_set_mode(choose_selection, GTK_SELECTION_MULTIPLE); |
| 274 | |
| 275 | /* Catch button presses */ |
| 276 | g_signal_connect(choose_view, "button-press-event", |
| 277 | G_CALLBACK(choose_button_event), 0); |
| 278 | g_signal_connect(choose_view, "button-release-event", |
| 279 | G_CALLBACK(choose_button_event), 0); |
| 280 | /* Catch row expansions so we can fill in placeholders */ |
| 281 | g_signal_connect(choose_view, "row-expanded", |
| 282 | G_CALLBACK(choose_row_expanded), 0); |
| 283 | |
| 284 | /* Fill the root */ |
| 285 | disorder_eclient_files(client, choose_files_completed, "", NULL, NULL); |
| 286 | disorder_eclient_dirs(client, choose_dirs_completed, "", NULL, NULL); |
| 287 | |
| 288 | /* Make the widget scrollable */ |
| 289 | GtkWidget *scrolled = scroll_widget(choose_view); |
| 290 | g_object_set_data(G_OBJECT(scrolled), "type", (void *)&choose_tabtype); |
| 291 | return scrolled; |
| 292 | } |
| 293 | |
| 294 | /* |
| 295 | Local Variables: |
| 296 | c-basic-offset:2 |
| 297 | comment-column:40 |
| 298 | fill-column:79 |
| 299 | indent-tabs-mode:nil |
| 300 | End: |
| 301 | */ |