notebook.c

   1 /*
   2  * (c) 2010 Cyrill Gorcunov, gorcunov@gmail.com
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or (at
   7  * your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  *
  18  */
  19
  20 #include <unistd.h>
  21 #include <stdio.h>
  22 #include <stddef.h>
  23 #include <stdlib.h>
  24 #include <stdarg.h>
  25 #include <string.h>
  26 #include <errno.h>
  27 #include <limits.h>
  28 #include <sys/param.h>
  29 #include <sys/types.h>
  30
  31 #include <gtk/gtk.h>
  32
  33 #include "notebook.h"
  34
  35 #include "util.h"
  36 #include "list.h"
  37
  38 #include "sourceview.h"
  39
  40 #include "backend-proto.h"
  41
  42 #define NB_PAGE_LOCKED_IMG      GTK_STOCK_NO
  43 #define NB_PAGE_UNLOCKED_IMG    GTK_STOCK_YES
  44
  45 #define NB_CLOSE_PAGE_RC_NAME "nb_page_close-button"
  46 static const char nb_page_close_rc[] =
  47         "style \"nb_page_close-style\"\n"
  48         "{\n"
  49         "       GtkWidget::focus-padding = 0\n"
  50         "       GtkWidget::focus-line-width = 0\n"
  51         "       xthickness = 0\n"
  52         "       ythickness = 0\n"
  53         "}\n"
  54         "widget \"*.nb_page_close-button\" style \"nb_page_close-style\"";
  55
  56 #define NB_LOCK_PAGE_RC_NAME "nb_page_lock-button"
  57 static const char nb_page_lock_rc[] =
  58         "style \"nb_page_lock-style\"\n"
  59         "{\n"
  60         "       GtkWidget::focus-padding = 0\n"
  61         "       GtkWidget::focus-line-width = 0\n"
  62         "       xthickness = 0\n"
  63         "       ythickness = 0\n"
  64         "}\n"
  65         "widget \"*.nb_page_lock-button\" style \"nb_page_lock-style\"";
  66
  67 void notebook_init(void)
  68 {
  69         gtk_rc_parse_string(nb_page_close_rc);
  70         gtk_rc_parse_string(nb_page_lock_rc);
  71 }
  72
  73 void notebook_fini(void)
  74 {
  75         /* FIXME: Something there? */
  76 }
  77
  78 static void notebook_delete_title(struct notebook_title *title)
  79 {
  80         gtk_widget_destroy(title->label);
  81         gtk_widget_destroy(title->lock_image);
  82         gtk_widget_destroy(title->lock_button);
  83         gtk_widget_destroy(title->close_image);
  84         gtk_widget_destroy(title->close_button);
  85
  86         memset(title, 0, sizeof(*title));
  87 }
  88
  89 static void notebook_delete_page(struct notebook_page *page)
  90 {
  91         GtkNotebook *nb = GTK_NOTEBOOK(page->notebook->me);
  92         int pos;
  93
  94         /* title composite */
  95         notebook_delete_title(&page->title);
  96
  97         /* child widget (text view and friends) */
  98         if (page->child) {
  99                 /*
 100                  * NOTE: If child widget embedded into notebook
 101                  * deletes itself we should not call gtk_notebook_remove_page
 102                  * the GTK will delete the page by self
 103                  */
 104                 if (page->child_delete_hook) {
 105                         page->child_delete_hook(page->child, page->private);
 106                 } else {
 107                         pos = gtk_notebook_page_num(nb, page->child);
 108                         if (pos != NB_ENOPAGE)
 109                                 gtk_notebook_remove_page(GTK_NOTEBOOK(page->notebook->me), pos);
 110                 }
 111         }
 112
 113         list_del(&page->siblings);
 114         free(page);
 115 }
 116
 117 static void cb_page_switched(GtkNotebook *nb, GtkWidget *pg,
 118                         guint page_num, gpointer user_data)
 119 {
 120         struct notebook *notebook = (struct notebook *)user_data;
 121         struct notebook_page *page;
 122         unsigned int num;
 123
 124         list_for_each_entry(page, &notebook->pages, siblings) {
 125                 num = gtk_notebook_page_num(GTK_NOTEBOOK(notebook->me), page->child);
 126                 if (num == page_num) {
 127                         if (page->page_changed_hook)
 128                                 page->page_changed_hook(page);
 129                         else
 130                                 break;
 131                 }
 132         }
 133 }
 134
 135 struct notebook *notebook_create(void)
 136 {
 137         struct notebook *notebook = xzalloc(sizeof(*notebook));
 138
 139         notebook->me = GTK_WIDGET(gtk_notebook_new());
 140         INIT_LIST_HEAD(&notebook->pages);
 141
 142         gtk_notebook_set_scrollable(GTK_NOTEBOOK(notebook->me), TRUE);
 143
 144         /* signals */
 145         g_signal_connect(G_OBJECT(notebook->me), "switch-page",
 146                 G_CALLBACK(cb_page_switched), (gpointer)notebook);
 147
 148         return notebook;
 149 }
 150
 151 void notebook_delete(struct notebook *notebook)
 152 {
 153         if (!notebook)
 154                 return;
 155
 156         if (!list_empty(&notebook->pages)) {
 157                 struct notebook_page *page, *n;
 158                 list_for_each_entry_safe(page, n, &notebook->pages, siblings)
 159                         notebook_delete_page(page);
 160         }
 161
 162         gtk_widget_destroy(notebook->me);
 163         free(notebook);
 164 }
 165
 166 static void cb_lock_page(GtkButton *widget, gpointer data)
 167 {
 168         struct notebook_page *page = data;
 169         GtkImage *image = GTK_IMAGE(page->title.lock_image);
 170
 171         gtk_image_clear(image);
 172
 173         if (page->status & NB_STATUS_LOCKED) {
 174                 gtk_image_set_from_stock(image, NB_PAGE_UNLOCKED_IMG, GTK_ICON_SIZE_MENU);
 175                 page->status &= ~NB_STATUS_LOCKED;
 176         } else {
 177                 gtk_image_set_from_stock(image, GTK_STOCK_NO, GTK_ICON_SIZE_MENU);
 178                 page->status |= NB_STATUS_LOCKED;
 179         }
 180
 181         gtk_widget_show_all(GTK_WIDGET(image));
 182 }
 183
 184 static void cb_close_page(GtkButton *widget, gpointer data)
 185 {
 186         struct notebook_page *notebook_page = data;
 187         if (!(notebook_page->status & NB_STATUS_LOCKED))
 188                 notebook_delete_page((struct notebook_page *)data);
 189 }
 190
 191 /* create new empty page */
 192 struct notebook_page *notebook_create_page(struct notebook *notebook, char *title, int title_nchars, int status)
 193 {
 194         struct notebook_page *page;
 195
 196         page                            = xzalloc(sizeof(*page));
 197         page->status                    = status;
 198         page->title.container           = gtk_hbox_new(FALSE, 3);
 199         page->title.label               = gtk_label_new(title);
 200         page->title.close_button        = gtk_button_new();
 201         page->title.lock_button         = gtk_button_new();
 202         page->title.close_image         = gtk_image_new_from_stock(GTK_STOCK_CLOSE, GTK_ICON_SIZE_MENU);
 203         page->title.lock_image          = gtk_image_new_from_stock(NB_PAGE_UNLOCKED_IMG, GTK_ICON_SIZE_MENU);
 204
 205         gtk_label_set_max_width_chars(GTK_LABEL(page->title.label), title_nchars);
 206
 207         gtk_widget_set_name(page->title.close_button, NB_CLOSE_PAGE_RC_NAME);
 208         gtk_widget_set_name(page->title.close_button, NB_LOCK_PAGE_RC_NAME);
 209
 210         gtk_button_set_relief(GTK_BUTTON(page->title.close_button), GTK_RELIEF_NONE);
 211         gtk_button_set_relief(GTK_BUTTON(page->title.lock_button), GTK_RELIEF_NONE);
 212
 213         gtk_box_pack_start(GTK_BOX(page->title.container), page->title.lock_button, TRUE, TRUE, 0);
 214         gtk_box_pack_start(GTK_BOX(page->title.container), page->title.label, TRUE, TRUE, 0);
 215         gtk_box_pack_start(GTK_BOX(page->title.container), page->title.close_button, FALSE, FALSE, 0);
 216
 217         gtk_container_add(GTK_CONTAINER(page->title.lock_button), page->title.lock_image);
 218         gtk_container_add(GTK_CONTAINER(page->title.close_button), page->title.close_image);
 219
 220         /* buttons signals */
 221         g_signal_connect(page->title.lock_button, "clicked", G_CALLBACK(cb_lock_page), page);
 222         g_signal_connect(page->title.close_button, "clicked", G_CALLBACK(cb_close_page), page);
 223
 224         gtk_widget_show_all(page->title.container);
 225
 226         /* link to notebook */
 227         page->notebook = notebook;
 228         list_add(&page->siblings, &notebook->pages);
 229
 230         return page;
 231 }
 232
 233 void notebook_page_child_attach(struct notebook_page *page, GtkWidget *widget, void *private,
 234                                 void (*page_changed_hook)(struct notebook_page *page),
 235                                 void (*child_delete_hook)(GtkWidget *child, void *private))
 236 {
 237         page->child = widget;
 238         page->page_changed_hook = page_changed_hook;
 239         page->child_delete_hook = child_delete_hook;
 240         page->private = private;
 241
 242         gtk_notebook_append_page(GTK_NOTEBOOK(page->notebook->me), widget, page->title.container);
 243         gtk_notebook_set_tab_reorderable(GTK_NOTEBOOK(page->notebook->me), widget, TRUE);
 244 }
 245
 246 void notebook_page_child_dettach(struct notebook_page *page)
 247 {
 248         page->child = NULL;
 249         page->child_delete_hook = NULL;
 250         page->private = NULL;
 251 }
 252
 253 void notebook_activate_page(struct notebook *notebook, struct notebook_page *page)
 254 {
 255         int num;
 256         gtk_widget_show(page->child);
 257         num = gtk_notebook_page_num(GTK_NOTEBOOK(notebook->me), page->child);
 258         gtk_notebook_set_current_page(GTK_NOTEBOOK(notebook->me), num);
 259 }
 260
 261 struct notebook_page *notebook_page_find(struct notebook *notebook, GtkWidget *child)
 262 {
 263         struct notebook_page *page;
 264
 265         list_for_each_entry(page, &notebook->pages, siblings) {
 266                 if (page->child == child)
 267                         return page;
 268         }
 269
 270         return NULL;
 271 }