Start rewriting Disobedience choose tab using native tree. Much
[disorder] / disobedience / choose.c
CommitLineData
460b9539 1/*
2 * This file is part of DisOrder
ebcfbfef 3 * Copyright (C) 2008 Richard Kettlewell
460b9539 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 */
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20/** @file disobedience/choose.c
21 * @brief Hierarchical track selection and search
22 *
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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
42 * - playing state
43 * - display length of tracks
b9bdafc7 44 */
460b9539 45
46#include "disobedience.h"
16e145a5 47
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48/** @brief Extra data at each node */
49struct choosedata {
50 /** @brief Node type */
51 int type;
460b9539 52
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53 /** @brief Full track or directory name */
54 gchar *track;
460b9539 55
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56 /** @brief Sort key */
57 gchar *sort;
460b9539 58};
59
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60/** @brief Track name column number */
61#define NAME_COLUMN 0
460b9539 62
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63/** @brief Hidden column number */
64#define CHOOSEDATA_COLUMN 1
460b9539 65
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66/** @brief @ref choosedata node is a file */
67#define CHOOSE_FILE 0
16e145a5 68
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69/** @brief @ref choosedata node is a directory */
70#define CHOOSE_DIRECTORY 1
16e145a5 71
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72/** @brief The current selection tree */
73static GtkTreeStore *choose_store;
16e145a5 74
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75/** @brief The view onto the selection tree */
76static GtkWidget *choose_view;
16e145a5 77
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78/** @brief The selection tree's selection */
79static GtkTreeSelection *choose_selection;
16e145a5 80
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81/** @brief Popup menu */
82//static GtkWidget *choose_menu;
460b9539 83
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84/** @brief Map choosedata types to names */
85static const char *const choose_type_map[] = { "track", "dir" };
460b9539 86
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87/** @brief Return the choosedata given an interator */
88static struct choosedata *choose_iter_to_data(GtkTreeIter *iter) {
89 GValue v[1];
90 memset(v, 0, sizeof v);
91 gtk_tree_model_get_value(GTK_TREE_MODEL(choose_store), iter, CHOOSEDATA_COLUMN, v);
92 assert(G_VALUE_TYPE(v) == G_TYPE_POINTER);
93 struct choosedata *const cd = g_value_get_pointer(v);
94 g_value_unset(v);
95 return cd;
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96}
97
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98/** @brief Remove node @p it and all its children
99 * @param Iterator, updated to point to next
100 * @return True if iterator remains valid
16e145a5 101 */
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102static gboolean choose_remove_node(GtkTreeIter *it) {
103 GtkTreeIter child[1];
104 gboolean childv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
105 child,
106 it);
107 while(childv)
108 childv = choose_remove_node(child);
109 struct choosedata *cd = choose_iter_to_data(it);
110 if(cd) {
111 g_free(cd->track);
112 g_free(cd->sort);
113 g_free(cd);
114 }
115 return gtk_tree_store_remove(choose_store, it);
116}
117
118/** @brief (Re-)populate a node
119 * @param parent_ref Node to populate or NULL to fill root
120 * @param nvec Number of children to add
121 * @param vec Children
122 * @param dirs True if children are directories
b9bdafc7 123 *
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124 * Adjusts the set of files (or directories) below @p parent_ref to match those
125 * listed in @p nvec and @p vec.
fcc8b9f7 126 *
ebcfbfef 127 * @parent_ref will be destroyed.
fcc8b9f7 128 */
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129static void choose_populate(GtkTreeRowReference *parent_ref,
130 int nvec, char **vec,
131 int type) {
132 /* Compute parent_* */
133 GtkTreeIter pit[1], *parent_it;
134 GtkTreePath *parent_path;
135 if(parent_ref) {
136 parent_path = gtk_tree_row_reference_get_path(parent_ref);
137 parent_it = pit;
138 gboolean pitv = gtk_tree_model_get_iter(GTK_TREE_MODEL(choose_store),
139 pit, parent_path);
140 assert(pitv);
141 /*fprintf(stderr, "choose_populate %s: parent path is [%s]\n",
142 choose_type_map[type],
143 gtk_tree_path_to_string(parent_path));*/
460b9539 144 } else {
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145 parent_path = 0;
146 parent_it = 0;
147 /*fprintf(stderr, "choose_populate %s: populating the root\n",
148 choose_type_map[type]);*/
149 }
150 /* Remove unwanted nodes and find out which we must add */
151 //fprintf(stderr, " trimming unwanted %s nodes\n", choose_type_map[type]);
152 char *found = xmalloc(nvec);
153 GtkTreeIter it[1];
154 gboolean itv = gtk_tree_model_iter_children(GTK_TREE_MODEL(choose_store),
155 it,
156 parent_it);
157 while(itv) {
158 struct choosedata *cd = choose_iter_to_data(it);
159 int keep;
160
161 if(!cd) {
162 /* Always kill placeholders */
163 //fprintf(stderr, " kill a placeholder\n");
164 keep = 0;
165 } else if(cd->type == type) {
166 /* This is the type we care about */
167 //fprintf(stderr, " %s is a %s\n", cd->track, choose_type_map[cd->type]);
168 int n;
169 for(n = 0; n < nvec && strcmp(vec[n], cd->track); ++n)
170 ;
171 if(n < nvec) {
172 //fprintf(stderr, " ... and survives\n");
173 found[n] = 1;
174 keep = 1;
175 } else {
176 //fprintf(stderr, " ... and is to be removed\n");
177 keep = 0;
c3df9503 178 }
6a06a735 179 } else {
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180 /* Keep wrong-type entries */
181 //fprintf(stderr, " %s is a %s\n", cd->track, choose_type_map[cd->type]);
182 keep = 1;
460b9539 183 }
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184 if(keep)
185 itv = gtk_tree_model_iter_next(GTK_TREE_MODEL(choose_store), it);
186 else
187 itv = choose_remove_node(it);
188 }
189 /* Add nodes we don't have */
190 int inserted = 0;
191 //fprintf(stderr, " inserting new %s nodes\n", choose_type_map[type]);
192 for(int n = 0; n < nvec; ++n) {
193 if(!found[n]) {
194 //fprintf(stderr, " %s was not found\n", vec[n]);
195 struct choosedata *cd = g_malloc0(sizeof *cd);
196 cd->type = type;
197 cd->track = g_strdup(vec[n]);
198 cd->sort = g_strdup(trackname_transform(choose_type_map[type],
199 vec[n],
200 "sort"));
201 gtk_tree_store_append(choose_store, it, parent_it);
202 gtk_tree_store_set(choose_store, it,
203 NAME_COLUMN, trackname_transform(choose_type_map[type],
204 vec[n],
205 "display"),
206 CHOOSEDATA_COLUMN, cd,
207 -1);
208 ++inserted;
209 /* If we inserted a directory, insert a placeholder too, so it appears to
210 * have children; it will be deleted when we expand the directory. */
211 if(type == CHOOSE_DIRECTORY) {
212 //fprintf(stderr, " inserting a placeholder\n");
213 GtkTreeIter placeholder[1];
214
215 gtk_tree_store_append(choose_store, placeholder, it);
216 gtk_tree_store_set(choose_store, placeholder,
217 NAME_COLUMN, "Waddling...",
218 CHOOSEDATA_COLUMN, (void *)0,
219 -1);
e9b70a84 220 }
460b9539 221 }
460b9539 222 }
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223 //fprintf(stderr, " %d nodes inserted\n", inserted);
224 if(inserted) {
225 /* TODO sort the children */
33288048 226 }
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227 if(parent_ref) {
228 /* If we deleted a placeholder then we must re-expand the row */
229 gtk_tree_view_expand_row(GTK_TREE_VIEW(choose_view), parent_path, FALSE);
230 gtk_tree_row_reference_free(parent_ref);
231 gtk_tree_path_free(parent_path);
460b9539 232 }
460b9539 233}
234
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235static void choose_dirs_completed(void *v,
236 const char *error,
237 int nvec, char **vec) {
238 if(error) {
239 popup_protocol_error(0, error);
240 return;
460b9539 241 }
ebcfbfef 242 choose_populate(v, nvec, vec, CHOOSE_DIRECTORY);
460b9539 243}
244
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245static void choose_files_completed(void *v,
246 const char *error,
247 int nvec, char **vec) {
248 if(error) {
53fa91bb 249 popup_protocol_error(0, error);
ebcfbfef 250 return;
460b9539 251 }
ebcfbfef 252 choose_populate(v, nvec, vec, CHOOSE_FILE);
460b9539 253}
254
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255static void choose_row_expanded(GtkTreeView attribute((unused)) *treeview,
256 GtkTreeIter *iter,
257 GtkTreePath *path,
460b9539 258 gpointer attribute((unused)) user_data) {
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259 /*fprintf(stderr, "row-expanded path=[%s]\n",
260 gtk_tree_path_to_string(path));*/
261 /* We update a node's contents whenever it is expanded, even if it was
262 * already populated; the effect is that contracting and expanding a node
263 * suffices to update it to the latest state on the server. */
264 struct choosedata *cd = choose_iter_to_data(iter);
265 disorder_eclient_files(client, choose_files_completed,
266 xstrdup(cd->track),
267 NULL,
268 gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
269 path));
270 disorder_eclient_dirs(client, choose_dirs_completed,
271 xstrdup(cd->track),
272 NULL,
273 gtk_tree_row_reference_new(GTK_TREE_MODEL(choose_store),
274 path));
275 /* The row references are destroyed in the _completed handlers. */
276}
277
278static int choose_tab_selectall_sensitive(void attribute((unused)) *extra) {
279 return TRUE;
460b9539 280}
460b9539 281
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282static void choose_tab_selectall_activate(void attribute((unused)) *extra) {
283 gtk_tree_selection_select_all(choose_selection);
460b9539 284}
16e145a5 285
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286static int choose_tab_selectnone_sensitive(void attribute((unused)) *extra) {
287 return gtk_tree_selection_count_selected_rows(choose_selection) > 0;
16e145a5 288}
16e145a5 289
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290static void choose_tab_selectnone_activate(void attribute((unused)) *extra) {
291 gtk_tree_selection_unselect_all(choose_selection);
16e145a5 292}
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293
294static int choose_tab_properties_sensitive(void attribute((unused)) *extra) {
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295 return TRUE;
296}
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297
298static void choose_tab_properties_activate(void attribute((unused)) *extra) {
299 fprintf(stderr, "TODO choose_tab_properties_activate\n");
300}
301
302static const struct tabtype choose_tabtype = {
303 choose_tab_properties_sensitive,
304 choose_tab_selectall_sensitive,
305 choose_tab_selectnone_sensitive,
306 choose_tab_properties_activate,
307 choose_tab_selectall_activate,
308 choose_tab_selectnone_activate,
309 0,
ee7552f8 310 0
460b9539 311};
312
ebcfbfef 313/** @brief Create the choose tab */
460b9539 314GtkWidget *choose_widget(void) {
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315 /* Create the tree store. */
316 choose_store = gtk_tree_store_new(1 + CHOOSEDATA_COLUMN,
317 G_TYPE_STRING,
318 G_TYPE_POINTER);
319
320 /* Create the view */
321 choose_view = gtk_tree_view_new_with_model(GTK_TREE_MODEL(choose_store));
322
323 /* Create cell renderers and columns */
324 GtkCellRenderer *r = gtk_cell_renderer_text_new();
325 GtkTreeViewColumn *c = gtk_tree_view_column_new_with_attributes
326 ("Track",
327 r,
328 "text", 0,
329 (char *)0);
330 gtk_tree_view_append_column(GTK_TREE_VIEW(choose_view), c);
460b9539 331
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332 /* The selection should support multiple things being selected */
333 choose_selection = gtk_tree_view_get_selection(GTK_TREE_VIEW(choose_view));
334 gtk_tree_selection_set_mode(choose_selection, GTK_SELECTION_MULTIPLE);
335
336 /* Catch button presses */
337 /*g_signal_connect(choose_view, "button-press-event",
338 G_CALLBACK(choose_button_release), 0);*/
339 /* Catch row expansions so we can fill in placeholders */
340 g_signal_connect(choose_view, "row-expanded",
341 G_CALLBACK(choose_row_expanded), 0);
460b9539 342
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343 /* Fill the root */
344 disorder_eclient_files(client, choose_files_completed, "", NULL, NULL);
345 disorder_eclient_dirs(client, choose_dirs_completed, "", NULL, NULL);
346
347 /* Make the widget scrollable */
348 GtkWidget *scrolled = scroll_widget(choose_view);
349 g_object_set_data(G_OBJECT(scrolled), "type", (void *)&choose_tabtype);
350 return scrolled;
460b9539 351}
352
353/*
354Local Variables:
355c-basic-offset:2
356comment-column:40
357fill-column:79
358indent-tabs-mode:nil
359End:
360*/