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.
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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.
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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"
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50 #define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
51 #include "gtktextchild.h"
52 #include "gtktextbtree.h"
53 #include "gtktextlayout.h"
55 static GtkTextLineSegment *
56 pixbuf_segment_cleanup_func (GtkTextLineSegment *seg,
64 pixbuf_segment_delete_func (GtkTextLineSegment *seg,
68 if (seg->body.pixbuf.pixbuf)
69 g_object_unref (G_OBJECT (seg->body.pixbuf.pixbuf));
77 pixbuf_segment_check_func (GtkTextLineSegment *seg,
80 if (seg->next == NULL)
81 g_error ("pixbuf segment is the last segment in a line");
83 if (seg->byte_count != 3)
84 g_error ("pixbuf segment has byte count of %d", seg->byte_count);
86 if (seg->char_count != 1)
87 g_error ("pixbuf segment has char count of %d", seg->char_count);
91 GtkTextLineSegmentClass gtk_text_pixbuf_type = {
93 FALSE, /* leftGravity */
95 pixbuf_segment_delete_func, /* deleteFunc */
96 pixbuf_segment_cleanup_func, /* cleanupFunc */
97 NULL, /* lineChangeFunc */
98 pixbuf_segment_check_func /* checkFunc */
102 #define PIXBUF_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
103 + sizeof (GtkTextPixbuf)))
106 _gtk_pixbuf_segment_new (GdkPixbuf *pixbuf)
108 GtkTextLineSegment *seg;
110 seg = g_malloc (PIXBUF_SEG_SIZE);
112 seg->type = >k_text_pixbuf_type;
116 seg->byte_count = 3; /* We convert to the 0xFFFC "unknown character",
117 * a 3-byte sequence in UTF-8
121 seg->body.pixbuf.pixbuf = pixbuf;
123 g_object_ref (G_OBJECT (pixbuf));
129 static GtkTextLineSegment *
130 child_segment_cleanup_func (GtkTextLineSegment *seg,
133 seg->body.child.line = line;
139 child_segment_delete_func (GtkTextLineSegment *seg,
146 _gtk_text_btree_unregister_child_anchor (seg->body.child.obj);
148 seg->body.child.tree = NULL;
149 seg->body.child.line = NULL;
151 /* avoid removing widgets while walking the list */
152 copy = g_slist_copy (seg->body.child.widgets);
154 while (tmp_list != NULL)
156 GtkWidget *child = tmp_list->data;
158 gtk_widget_destroy (child);
160 tmp_list = g_slist_next (tmp_list);
163 /* On removal from the widget's parents (GtkTextView),
164 * the widget should have been removed from the anchor.
166 g_assert (seg->body.child.widgets == NULL);
170 _gtk_widget_segment_unref (seg);
176 child_segment_check_func (GtkTextLineSegment *seg,
179 if (seg->next == NULL)
180 g_error ("child segment is the last segment in a line");
182 if (seg->byte_count != 3)
183 g_error ("child segment has byte count of %d", seg->byte_count);
185 if (seg->char_count != 1)
186 g_error ("child segment has char count of %d", seg->char_count);
189 GtkTextLineSegmentClass gtk_text_child_type = {
190 "child-widget", /* name */
191 FALSE, /* leftGravity */
192 NULL, /* splitFunc */
193 child_segment_delete_func, /* deleteFunc */
194 child_segment_cleanup_func, /* cleanupFunc */
195 NULL, /* lineChangeFunc */
196 child_segment_check_func /* checkFunc */
199 #define WIDGET_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
200 + sizeof (GtkTextChildBody)))
203 _gtk_widget_segment_new (GtkTextChildAnchor *anchor)
205 GtkTextLineSegment *seg;
207 seg = g_malloc (WIDGET_SEG_SIZE);
209 seg->type = >k_text_child_type;
213 seg->byte_count = 3; /* We convert to the 0xFFFC "unknown character",
214 * a 3-byte sequence in UTF-8
218 seg->body.child.obj = anchor;
219 seg->body.child.obj->segment = seg;
220 seg->body.child.widgets = NULL;
221 seg->body.child.tree = NULL;
222 seg->body.child.line = NULL;
224 g_object_ref (G_OBJECT (anchor));
230 _gtk_widget_segment_add (GtkTextLineSegment *widget_segment,
233 g_return_if_fail (widget_segment->type = >k_text_child_type);
234 g_return_if_fail (widget_segment->body.child.tree != NULL);
236 g_object_ref (G_OBJECT (child));
238 widget_segment->body.child.widgets =
239 g_slist_prepend (widget_segment->body.child.widgets,
244 _gtk_widget_segment_remove (GtkTextLineSegment *widget_segment,
247 g_return_if_fail (widget_segment->type = >k_text_child_type);
249 widget_segment->body.child.widgets =
250 g_slist_remove (widget_segment->body.child.widgets,
253 g_object_unref (G_OBJECT (child));
257 _gtk_widget_segment_ref (GtkTextLineSegment *widget_segment)
259 g_assert (widget_segment->type = >k_text_child_type);
261 g_object_ref (G_OBJECT (widget_segment->body.child.obj));
265 _gtk_widget_segment_unref (GtkTextLineSegment *widget_segment)
267 g_assert (widget_segment->type = >k_text_child_type);
269 g_object_unref (G_OBJECT (widget_segment->body.child.obj));
273 _gtk_anchored_child_get_layout (GtkWidget *child)
275 return g_object_get_data (G_OBJECT (child), "gtk-text-child-anchor-layout");
279 _gtk_anchored_child_set_layout (GtkWidget *child,
280 GtkTextLayout *layout)
282 g_object_set_data (G_OBJECT (child),
283 "gtk-text-child-anchor-layout",
287 static void gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor);
288 static void gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass);
289 static void gtk_text_child_anchor_finalize (GObject *obj);
291 static gpointer parent_class = NULL;
294 gtk_text_child_anchor_get_type (void)
296 static GType object_type = 0;
300 static const GTypeInfo object_info =
302 sizeof (GtkTextChildAnchorClass),
303 (GBaseInitFunc) NULL,
304 (GBaseFinalizeFunc) NULL,
305 (GClassInitFunc) gtk_text_child_anchor_class_init,
306 NULL, /* class_finalize */
307 NULL, /* class_data */
308 sizeof (GtkTextChildAnchor),
310 (GInstanceInitFunc) gtk_text_child_anchor_init,
313 object_type = g_type_register_static (G_TYPE_OBJECT,
314 "GtkTextChildAnchor",
322 gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor)
324 child_anchor->segment = NULL;
328 gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass)
330 GObjectClass *object_class = G_OBJECT_CLASS (klass);
332 parent_class = g_type_class_peek_parent (klass);
334 object_class->finalize = gtk_text_child_anchor_finalize;
338 * gtk_text_child_anchor_new:
340 * Creates a new #GtkTextChildAnchor. Usually you would then insert
341 * it into a #GtkTextBuffer with gtk_text_buffer_insert_child_anchor().
342 * To perform the creation and insertion in one step, use the
343 * convenience function gtk_text_buffer_create_child_anchor().
345 * Return value: a new #GtkTextChildAnchor
348 gtk_text_child_anchor_new (void)
350 return GTK_TEXT_CHILD_ANCHOR (g_object_new (GTK_TYPE_TEXT_CHILD_ANCHOR,
355 gtk_text_child_anchor_finalize (GObject *obj)
357 GtkTextChildAnchor *anchor;
359 GtkTextLineSegment *seg;
361 anchor = GTK_TEXT_CHILD_ANCHOR (obj);
363 seg = anchor->segment;
365 if (seg->body.child.tree != NULL)
367 g_warning ("Someone removed a reference to a GtkTextChildAnchor "
368 "they didn't own; the anchor is still in the text buffer "
369 "and the refcount is 0.");
373 tmp_list = seg->body.child.widgets;
376 g_object_unref (G_OBJECT (tmp_list->data));
378 tmp_list = g_slist_next (tmp_list);
381 g_slist_free (seg->body.child.widgets);
385 anchor->segment = NULL;
389 * gtk_text_child_anchor_get_widgets:
390 * @anchor: a #GtkTextChildAnchor
392 * Gets a list of all widgets anchored at this child anchor.
393 * The returned list should be freed with g_list_free().
396 * Return value: list of widgets anchored at @anchor
399 gtk_text_child_anchor_get_widgets (GtkTextChildAnchor *anchor)
401 GtkTextLineSegment *seg = anchor->segment;
405 g_return_val_if_fail (seg->type = >k_text_child_type, NULL);
407 iter = seg->body.child.widgets;
410 list = g_list_prepend (list, iter->data);
412 iter = g_slist_next (iter);
415 /* Order is not relevant, so we don't need to reverse the list
422 * gtk_text_child_anchor_get_deleted:
423 * @anchor: a #GtkTextChildAnchor
425 * Determines whether a child anchor has been deleted from
426 * the buffer. Keep in mind that the child anchor will be
427 * unreferenced when removed from the buffer, so you need to
428 * hold your own reference (with g_object_ref()) if you plan
429 * to use this function — otherwise all deleted child anchors
430 * will also be finalized.
432 * Return value: %TRUE if the child anchor has been deleted from its buffer
435 gtk_text_child_anchor_get_deleted (GtkTextChildAnchor *anchor)
437 GtkTextLineSegment *seg = anchor->segment;
439 g_return_val_if_fail (seg->type = >k_text_child_type, TRUE);
441 return seg->body.child.tree == NULL;
445 gtk_text_child_anchor_register_child (GtkTextChildAnchor *anchor,
447 GtkTextLayout *layout)
449 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
450 g_return_if_fail (GTK_IS_WIDGET (child));
452 _gtk_anchored_child_set_layout (child, layout);
454 _gtk_widget_segment_add (anchor->segment, child);
456 gtk_text_child_anchor_queue_resize (anchor, layout);
460 gtk_text_child_anchor_unregister_child (GtkTextChildAnchor *anchor,
463 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
464 g_return_if_fail (GTK_IS_WIDGET (child));
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 seg = anchor->segment;
490 if (seg->body.child.tree == NULL)
493 gtk_text_buffer_get_iter_at_child_anchor (layout->buffer,
496 gtk_text_iter_forward_char (&end);
498 gtk_text_layout_invalidate (layout, &start, &end);
502 gtk_text_anchored_child_set_layout (GtkWidget *child,
503 GtkTextLayout *layout)
505 g_return_if_fail (GTK_IS_WIDGET (child));
506 g_return_if_fail (layout == NULL || GTK_IS_TEXT_LAYOUT (layout));
508 _gtk_anchored_child_set_layout (child, layout);