1 /* gtktextchild.c - child pixmaps and widgets
3 * Copyright (c) 1994 The Regents of the University of California.
4 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
5 * Copyright (c) 2000 Red Hat, Inc.
6 * Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
8 * This software is copyrighted by the Regents of the University of
9 * California, Sun Microsystems, Inc., and other parties. The
10 * following terms apply to all files associated with the software
11 * unless explicitly disclaimed in individual files.
13 * The authors hereby grant permission to use, copy, modify,
14 * distribute, and license this software and its documentation for any
15 * purpose, provided that existing copyright notices are retained in
16 * all copies and that this notice is included verbatim in any
17 * distributions. No written agreement, license, or royalty fee is
18 * required for any of the authorized uses. Modifications to this
19 * software may be copyrighted by their authors and need not follow
20 * the licensing terms described here, provided that the new terms are
21 * clearly indicated on the first page of each file where they apply.
23 * IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
24 * PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
25 * DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
26 * OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
27 * OF THE POSSIBILITY OF SUCH DAMAGE.
29 * THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
30 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
31 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
32 * NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
33 * AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
34 * MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
36 * GOVERNMENT USE: If you are acquiring this software on behalf of the
37 * U.S. government, the Government shall have only "Restricted Rights"
38 * in the software and related documentation as defined in the Federal
39 * Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
40 * are acquiring the software on behalf of the Department of Defense,
41 * the software shall be classified as "Commercial Computer Software"
42 * and the Government shall have only "Restricted Rights" as defined
43 * in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
44 * foregoing, the authors grant the U.S. Government and others acting
45 * in its behalf permission to use and distribute the software in
46 * accordance with the terms specified in this license.
50 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
52 #include "gtktextchild.h"
53 #include "gtktextbtree.h"
54 #include "gtktextlayout.h"
57 #define CHECK_IN_BUFFER(anchor) \
59 if ((anchor)->segment == NULL) \
61 g_warning ("%s: GtkTextChildAnchor hasn't been in a buffer yet",\
66 #define CHECK_IN_BUFFER_RETURN(anchor, val) \
68 if ((anchor)->segment == NULL) \
70 g_warning ("%s: GtkTextChildAnchor hasn't been in a buffer yet",\
76 static GtkTextLineSegment *
77 pixbuf_segment_cleanup_func (GtkTextLineSegment *seg,
85 pixbuf_segment_delete_func (GtkTextLineSegment *seg,
89 if (seg->body.pixbuf.pixbuf)
90 g_object_unref (seg->body.pixbuf.pixbuf);
98 pixbuf_segment_check_func (GtkTextLineSegment *seg,
101 if (seg->next == NULL)
102 g_error ("pixbuf segment is the last segment in a line");
104 if (seg->byte_count != 3)
105 g_error ("pixbuf segment has byte count of %d", seg->byte_count);
107 if (seg->char_count != 1)
108 g_error ("pixbuf segment has char count of %d", seg->char_count);
112 const GtkTextLineSegmentClass gtk_text_pixbuf_type = {
114 FALSE, /* leftGravity */
115 NULL, /* splitFunc */
116 pixbuf_segment_delete_func, /* deleteFunc */
117 pixbuf_segment_cleanup_func, /* cleanupFunc */
118 NULL, /* lineChangeFunc */
119 pixbuf_segment_check_func /* checkFunc */
123 #define PIXBUF_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
124 + sizeof (GtkTextPixbuf)))
127 _gtk_pixbuf_segment_new (GdkPixbuf *pixbuf)
129 GtkTextLineSegment *seg;
131 seg = g_malloc (PIXBUF_SEG_SIZE);
133 seg->type = >k_text_pixbuf_type;
137 seg->byte_count = 3; /* We convert to the 0xFFFC "unknown character",
138 * a 3-byte sequence in UTF-8
142 seg->body.pixbuf.pixbuf = pixbuf;
144 g_object_ref (pixbuf);
150 static GtkTextLineSegment *
151 child_segment_cleanup_func (GtkTextLineSegment *seg,
154 seg->body.child.line = line;
160 child_segment_delete_func (GtkTextLineSegment *seg,
167 _gtk_text_btree_unregister_child_anchor (seg->body.child.obj);
169 seg->body.child.tree = NULL;
170 seg->body.child.line = NULL;
172 /* avoid removing widgets while walking the list */
173 copy = g_slist_copy (seg->body.child.widgets);
175 while (tmp_list != NULL)
177 GtkWidget *child = tmp_list->data;
179 gtk_widget_destroy (child);
181 tmp_list = g_slist_next (tmp_list);
184 /* On removal from the widget's parents (GtkTextView),
185 * the widget should have been removed from the anchor.
187 g_assert (seg->body.child.widgets == NULL);
191 _gtk_widget_segment_unref (seg);
197 child_segment_check_func (GtkTextLineSegment *seg,
200 if (seg->next == NULL)
201 g_error ("child segment is the last segment in a line");
203 if (seg->byte_count != 3)
204 g_error ("child segment has byte count of %d", seg->byte_count);
206 if (seg->char_count != 1)
207 g_error ("child segment has char count of %d", seg->char_count);
210 const GtkTextLineSegmentClass gtk_text_child_type = {
211 "child-widget", /* name */
212 FALSE, /* leftGravity */
213 NULL, /* splitFunc */
214 child_segment_delete_func, /* deleteFunc */
215 child_segment_cleanup_func, /* cleanupFunc */
216 NULL, /* lineChangeFunc */
217 child_segment_check_func /* checkFunc */
220 #define WIDGET_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
221 + sizeof (GtkTextChildBody)))
224 _gtk_widget_segment_new (GtkTextChildAnchor *anchor)
226 GtkTextLineSegment *seg;
228 seg = g_malloc (WIDGET_SEG_SIZE);
230 seg->type = >k_text_child_type;
234 seg->byte_count = 3; /* We convert to the 0xFFFC "unknown character",
235 * a 3-byte sequence in UTF-8
239 seg->body.child.obj = anchor;
240 seg->body.child.obj->segment = seg;
241 seg->body.child.widgets = NULL;
242 seg->body.child.tree = NULL;
243 seg->body.child.line = NULL;
245 g_object_ref (anchor);
251 _gtk_widget_segment_add (GtkTextLineSegment *widget_segment,
254 g_return_if_fail (widget_segment->type == >k_text_child_type);
255 g_return_if_fail (widget_segment->body.child.tree != NULL);
257 g_object_ref (child);
259 widget_segment->body.child.widgets =
260 g_slist_prepend (widget_segment->body.child.widgets,
265 _gtk_widget_segment_remove (GtkTextLineSegment *widget_segment,
268 g_return_if_fail (widget_segment->type == >k_text_child_type);
270 widget_segment->body.child.widgets =
271 g_slist_remove (widget_segment->body.child.widgets,
274 g_object_unref (child);
278 _gtk_widget_segment_ref (GtkTextLineSegment *widget_segment)
280 g_assert (widget_segment->type == >k_text_child_type);
282 g_object_ref (widget_segment->body.child.obj);
286 _gtk_widget_segment_unref (GtkTextLineSegment *widget_segment)
288 g_assert (widget_segment->type == >k_text_child_type);
290 g_object_unref (widget_segment->body.child.obj);
294 _gtk_anchored_child_get_layout (GtkWidget *child)
296 return g_object_get_data (G_OBJECT (child), "gtk-text-child-anchor-layout");
300 _gtk_anchored_child_set_layout (GtkWidget *child,
301 GtkTextLayout *layout)
303 g_object_set_data (G_OBJECT (child),
304 I_("gtk-text-child-anchor-layout"),
308 static void gtk_text_child_anchor_finalize (GObject *obj);
310 G_DEFINE_TYPE (GtkTextChildAnchor, gtk_text_child_anchor, G_TYPE_OBJECT)
313 gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor)
315 child_anchor->segment = NULL;
319 gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass)
321 GObjectClass *object_class = G_OBJECT_CLASS (klass);
323 object_class->finalize = gtk_text_child_anchor_finalize;
327 * gtk_text_child_anchor_new:
329 * Creates a new #GtkTextChildAnchor. Usually you would then insert
330 * it into a #GtkTextBuffer with gtk_text_buffer_insert_child_anchor().
331 * To perform the creation and insertion in one step, use the
332 * convenience function gtk_text_buffer_create_child_anchor().
334 * Return value: a new #GtkTextChildAnchor
337 gtk_text_child_anchor_new (void)
339 return g_object_new (GTK_TYPE_TEXT_CHILD_ANCHOR, NULL);
343 gtk_text_child_anchor_finalize (GObject *obj)
345 GtkTextChildAnchor *anchor;
347 GtkTextLineSegment *seg;
349 anchor = GTK_TEXT_CHILD_ANCHOR (obj);
351 seg = anchor->segment;
355 if (seg->body.child.tree != NULL)
357 g_warning ("Someone removed a reference to a GtkTextChildAnchor "
358 "they didn't own; the anchor is still in the text buffer "
359 "and the refcount is 0.");
363 tmp_list = seg->body.child.widgets;
366 g_object_unref (tmp_list->data);
367 tmp_list = g_slist_next (tmp_list);
370 g_slist_free (seg->body.child.widgets);
375 anchor->segment = NULL;
377 G_OBJECT_CLASS (gtk_text_child_anchor_parent_class)->finalize (obj);
381 * gtk_text_child_anchor_get_widgets:
382 * @anchor: a #GtkTextChildAnchor
384 * Gets a list of all widgets anchored at this child anchor.
385 * The returned list should be freed with g_list_free().
388 * Return value: (element-type GtkWidget) (transfer container): list of widgets anchored at @anchor
391 gtk_text_child_anchor_get_widgets (GtkTextChildAnchor *anchor)
393 GtkTextLineSegment *seg = anchor->segment;
397 CHECK_IN_BUFFER_RETURN (anchor, NULL);
399 g_return_val_if_fail (seg->type == >k_text_child_type, NULL);
401 iter = seg->body.child.widgets;
404 list = g_list_prepend (list, iter->data);
406 iter = g_slist_next (iter);
409 /* Order is not relevant, so we don't need to reverse the list
416 * gtk_text_child_anchor_get_deleted:
417 * @anchor: a #GtkTextChildAnchor
419 * Determines whether a child anchor has been deleted from
420 * the buffer. Keep in mind that the child anchor will be
421 * unreferenced when removed from the buffer, so you need to
422 * hold your own reference (with g_object_ref()) if you plan
423 * to use this function — otherwise all deleted child anchors
424 * will also be finalized.
426 * Return value: %TRUE if the child anchor has been deleted from its buffer
429 gtk_text_child_anchor_get_deleted (GtkTextChildAnchor *anchor)
431 GtkTextLineSegment *seg = anchor->segment;
433 CHECK_IN_BUFFER_RETURN (anchor, TRUE);
435 g_return_val_if_fail (seg->type == >k_text_child_type, TRUE);
437 return seg->body.child.tree == NULL;
441 gtk_text_child_anchor_register_child (GtkTextChildAnchor *anchor,
443 GtkTextLayout *layout)
445 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
446 g_return_if_fail (GTK_IS_WIDGET (child));
448 CHECK_IN_BUFFER (anchor);
450 _gtk_anchored_child_set_layout (child, layout);
452 _gtk_widget_segment_add (anchor->segment, child);
454 gtk_text_child_anchor_queue_resize (anchor, layout);
458 gtk_text_child_anchor_unregister_child (GtkTextChildAnchor *anchor,
461 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
462 g_return_if_fail (GTK_IS_WIDGET (child));
464 CHECK_IN_BUFFER (anchor);
466 if (_gtk_anchored_child_get_layout (child))
468 gtk_text_child_anchor_queue_resize (anchor,
469 _gtk_anchored_child_get_layout (child));
472 _gtk_anchored_child_set_layout (child, NULL);
474 _gtk_widget_segment_remove (anchor->segment, child);
478 gtk_text_child_anchor_queue_resize (GtkTextChildAnchor *anchor,
479 GtkTextLayout *layout)
483 GtkTextLineSegment *seg;
485 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
486 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
488 CHECK_IN_BUFFER (anchor);
490 seg = anchor->segment;
492 if (seg->body.child.tree == NULL)
495 gtk_text_buffer_get_iter_at_child_anchor (layout->buffer,
498 gtk_text_iter_forward_char (&end);
500 gtk_text_layout_invalidate (layout, &start, &end);
504 gtk_text_anchored_child_set_layout (GtkWidget *child,
505 GtkTextLayout *layout)
507 g_return_if_fail (GTK_IS_WIDGET (child));
508 g_return_if_fail (layout == NULL || GTK_IS_TEXT_LAYOUT (layout));
510 _gtk_anchored_child_set_layout (child, layout);