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
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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,
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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,
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38 * in the software and related documentation as defined in the Federal
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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 #define CHECK_IN_BUFFER(anchor) do { if ((anchor)->segment == NULL) g_warning ("%s: GtkTextChildAnchor hasn't been in a buffer yet", __FUNCTION__); } while (0)
56 #define CHECK_IN_BUFFER_RETURN(anchor, val) do { if ((anchor)->segment == NULL) g_warning ("%s: GtkTextChildAnchor hasn't been in a buffer yet", __FUNCTION__); return (val); } while (0)
58 static GtkTextLineSegment *
59 pixbuf_segment_cleanup_func (GtkTextLineSegment *seg,
67 pixbuf_segment_delete_func (GtkTextLineSegment *seg,
71 if (seg->body.pixbuf.pixbuf)
72 g_object_unref (G_OBJECT (seg->body.pixbuf.pixbuf));
80 pixbuf_segment_check_func (GtkTextLineSegment *seg,
83 if (seg->next == NULL)
84 g_error ("pixbuf segment is the last segment in a line");
86 if (seg->byte_count != 3)
87 g_error ("pixbuf segment has byte count of %d", seg->byte_count);
89 if (seg->char_count != 1)
90 g_error ("pixbuf segment has char count of %d", seg->char_count);
94 GtkTextLineSegmentClass gtk_text_pixbuf_type = {
96 FALSE, /* leftGravity */
98 pixbuf_segment_delete_func, /* deleteFunc */
99 pixbuf_segment_cleanup_func, /* cleanupFunc */
100 NULL, /* lineChangeFunc */
101 pixbuf_segment_check_func /* checkFunc */
105 #define PIXBUF_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
106 + sizeof (GtkTextPixbuf)))
109 _gtk_pixbuf_segment_new (GdkPixbuf *pixbuf)
111 GtkTextLineSegment *seg;
113 seg = g_malloc (PIXBUF_SEG_SIZE);
115 seg->type = >k_text_pixbuf_type;
119 seg->byte_count = 3; /* We convert to the 0xFFFC "unknown character",
120 * a 3-byte sequence in UTF-8
124 seg->body.pixbuf.pixbuf = pixbuf;
126 g_object_ref (G_OBJECT (pixbuf));
132 static GtkTextLineSegment *
133 child_segment_cleanup_func (GtkTextLineSegment *seg,
136 seg->body.child.line = line;
142 child_segment_delete_func (GtkTextLineSegment *seg,
149 _gtk_text_btree_unregister_child_anchor (seg->body.child.obj);
151 seg->body.child.tree = NULL;
152 seg->body.child.line = NULL;
154 /* avoid removing widgets while walking the list */
155 copy = g_slist_copy (seg->body.child.widgets);
157 while (tmp_list != NULL)
159 GtkWidget *child = tmp_list->data;
161 gtk_widget_destroy (child);
163 tmp_list = g_slist_next (tmp_list);
166 /* On removal from the widget's parents (GtkTextView),
167 * the widget should have been removed from the anchor.
169 g_assert (seg->body.child.widgets == NULL);
173 _gtk_widget_segment_unref (seg);
179 child_segment_check_func (GtkTextLineSegment *seg,
182 if (seg->next == NULL)
183 g_error ("child segment is the last segment in a line");
185 if (seg->byte_count != 3)
186 g_error ("child segment has byte count of %d", seg->byte_count);
188 if (seg->char_count != 1)
189 g_error ("child segment has char count of %d", seg->char_count);
192 GtkTextLineSegmentClass gtk_text_child_type = {
193 "child-widget", /* name */
194 FALSE, /* leftGravity */
195 NULL, /* splitFunc */
196 child_segment_delete_func, /* deleteFunc */
197 child_segment_cleanup_func, /* cleanupFunc */
198 NULL, /* lineChangeFunc */
199 child_segment_check_func /* checkFunc */
202 #define WIDGET_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
203 + sizeof (GtkTextChildBody)))
206 _gtk_widget_segment_new (GtkTextChildAnchor *anchor)
208 GtkTextLineSegment *seg;
210 seg = g_malloc (WIDGET_SEG_SIZE);
212 seg->type = >k_text_child_type;
216 seg->byte_count = 3; /* We convert to the 0xFFFC "unknown character",
217 * a 3-byte sequence in UTF-8
221 seg->body.child.obj = anchor;
222 seg->body.child.obj->segment = seg;
223 seg->body.child.widgets = NULL;
224 seg->body.child.tree = NULL;
225 seg->body.child.line = NULL;
227 g_object_ref (G_OBJECT (anchor));
233 _gtk_widget_segment_add (GtkTextLineSegment *widget_segment,
236 g_return_if_fail (widget_segment->type = >k_text_child_type);
237 g_return_if_fail (widget_segment->body.child.tree != NULL);
239 g_object_ref (G_OBJECT (child));
241 widget_segment->body.child.widgets =
242 g_slist_prepend (widget_segment->body.child.widgets,
247 _gtk_widget_segment_remove (GtkTextLineSegment *widget_segment,
250 g_return_if_fail (widget_segment->type = >k_text_child_type);
252 widget_segment->body.child.widgets =
253 g_slist_remove (widget_segment->body.child.widgets,
256 g_object_unref (G_OBJECT (child));
260 _gtk_widget_segment_ref (GtkTextLineSegment *widget_segment)
262 g_assert (widget_segment->type = >k_text_child_type);
264 g_object_ref (G_OBJECT (widget_segment->body.child.obj));
268 _gtk_widget_segment_unref (GtkTextLineSegment *widget_segment)
270 g_assert (widget_segment->type = >k_text_child_type);
272 g_object_unref (G_OBJECT (widget_segment->body.child.obj));
276 _gtk_anchored_child_get_layout (GtkWidget *child)
278 return g_object_get_data (G_OBJECT (child), "gtk-text-child-anchor-layout");
282 _gtk_anchored_child_set_layout (GtkWidget *child,
283 GtkTextLayout *layout)
285 g_object_set_data (G_OBJECT (child),
286 "gtk-text-child-anchor-layout",
290 static void gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor);
291 static void gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass);
292 static void gtk_text_child_anchor_finalize (GObject *obj);
294 static gpointer parent_class = NULL;
297 gtk_text_child_anchor_get_type (void)
299 static GType object_type = 0;
303 static const GTypeInfo object_info =
305 sizeof (GtkTextChildAnchorClass),
306 (GBaseInitFunc) NULL,
307 (GBaseFinalizeFunc) NULL,
308 (GClassInitFunc) gtk_text_child_anchor_class_init,
309 NULL, /* class_finalize */
310 NULL, /* class_data */
311 sizeof (GtkTextChildAnchor),
313 (GInstanceInitFunc) gtk_text_child_anchor_init,
316 object_type = g_type_register_static (G_TYPE_OBJECT,
317 "GtkTextChildAnchor",
325 gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor)
327 child_anchor->segment = NULL;
331 gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass)
333 GObjectClass *object_class = G_OBJECT_CLASS (klass);
335 parent_class = g_type_class_peek_parent (klass);
337 object_class->finalize = gtk_text_child_anchor_finalize;
341 * gtk_text_child_anchor_new:
343 * Creates a new #GtkTextChildAnchor. Usually you would then insert
344 * it into a #GtkTextBuffer with gtk_text_buffer_insert_child_anchor().
345 * To perform the creation and insertion in one step, use the
346 * convenience function gtk_text_buffer_create_child_anchor().
348 * Return value: a new #GtkTextChildAnchor
351 gtk_text_child_anchor_new (void)
353 return GTK_TEXT_CHILD_ANCHOR (g_object_new (GTK_TYPE_TEXT_CHILD_ANCHOR,
358 gtk_text_child_anchor_finalize (GObject *obj)
360 GtkTextChildAnchor *anchor;
362 GtkTextLineSegment *seg;
364 anchor = GTK_TEXT_CHILD_ANCHOR (obj);
366 seg = anchor->segment;
368 if (seg->body.child.tree != NULL)
370 g_warning ("Someone removed a reference to a GtkTextChildAnchor "
371 "they didn't own; the anchor is still in the text buffer "
372 "and the refcount is 0.");
376 tmp_list = seg->body.child.widgets;
379 g_object_unref (G_OBJECT (tmp_list->data));
381 tmp_list = g_slist_next (tmp_list);
384 g_slist_free (seg->body.child.widgets);
388 anchor->segment = NULL;
392 * gtk_text_child_anchor_get_widgets:
393 * @anchor: a #GtkTextChildAnchor
395 * Gets a list of all widgets anchored at this child anchor.
396 * The returned list should be freed with g_list_free().
399 * Return value: list of widgets anchored at @anchor
402 gtk_text_child_anchor_get_widgets (GtkTextChildAnchor *anchor)
404 GtkTextLineSegment *seg = anchor->segment;
408 CHECK_IN_BUFFER_RETURN (anchor, NULL);
410 g_return_val_if_fail (seg->type = >k_text_child_type, NULL);
412 iter = seg->body.child.widgets;
415 list = g_list_prepend (list, iter->data);
417 iter = g_slist_next (iter);
420 /* Order is not relevant, so we don't need to reverse the list
427 * gtk_text_child_anchor_get_deleted:
428 * @anchor: a #GtkTextChildAnchor
430 * Determines whether a child anchor has been deleted from
431 * the buffer. Keep in mind that the child anchor will be
432 * unreferenced when removed from the buffer, so you need to
433 * hold your own reference (with g_object_ref()) if you plan
434 * to use this function — otherwise all deleted child anchors
435 * will also be finalized.
437 * Return value: %TRUE if the child anchor has been deleted from its buffer
440 gtk_text_child_anchor_get_deleted (GtkTextChildAnchor *anchor)
442 GtkTextLineSegment *seg = anchor->segment;
444 CHECK_IN_BUFFER_RETURN (anchor, TRUE);
446 g_return_val_if_fail (seg->type = >k_text_child_type, TRUE);
448 return seg->body.child.tree == NULL;
452 gtk_text_child_anchor_register_child (GtkTextChildAnchor *anchor,
454 GtkTextLayout *layout)
456 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
457 g_return_if_fail (GTK_IS_WIDGET (child));
459 CHECK_IN_BUFFER (anchor);
461 _gtk_anchored_child_set_layout (child, layout);
463 _gtk_widget_segment_add (anchor->segment, child);
465 gtk_text_child_anchor_queue_resize (anchor, layout);
469 gtk_text_child_anchor_unregister_child (GtkTextChildAnchor *anchor,
472 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
473 g_return_if_fail (GTK_IS_WIDGET (child));
475 CHECK_IN_BUFFER (anchor);
477 if (_gtk_anchored_child_get_layout (child))
479 gtk_text_child_anchor_queue_resize (anchor,
480 _gtk_anchored_child_get_layout (child));
483 _gtk_anchored_child_set_layout (child, NULL);
485 _gtk_widget_segment_remove (anchor->segment, child);
489 gtk_text_child_anchor_queue_resize (GtkTextChildAnchor *anchor,
490 GtkTextLayout *layout)
494 GtkTextLineSegment *seg;
496 g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
497 g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
499 CHECK_IN_BUFFER (anchor);
501 seg = anchor->segment;
503 if (seg->body.child.tree == NULL)
506 gtk_text_buffer_get_iter_at_child_anchor (layout->buffer,
509 gtk_text_iter_forward_char (&end);
511 gtk_text_layout_invalidate (layout, &start, &end);
515 gtk_text_anchored_child_set_layout (GtkWidget *child,
516 GtkTextLayout *layout)
518 g_return_if_fail (GTK_IS_WIDGET (child));
519 g_return_if_fail (layout == NULL || GTK_IS_TEXT_LAYOUT (layout));
521 _gtk_anchored_child_set_layout (child, layout);