gtk2/gtk/gtktextchild.c
Havoc Pennington ca83d0a3dc Get widgets working on the btree/buffer side. Display of them still
2000-11-03  Havoc Pennington  <hp@redhat.com>

        Get widgets working on the btree/buffer side. Display of them
	still doesn't work.

	* gtk/gtktextview.c: start implementing child widget stuff

	* gtk/gtktextiter.c (gtk_text_iter_get_child_anchor): new function

	* gtk/gtktextlayout.c: handle embedded widgets

	* gtk/gtktextdisplay.c: handle embedded widgets

	* gtk/gtktextchild.c: Implement all the child anchor goo

	* gtk/gtktextbuffer.c (gtk_text_buffer_create_child_anchor): New
	function

	* gtk/gtktextbtree.c: Add child anchor table to the btree struct
	(insert_pixbuf_or_widget_segment): abstract out common portions of
	creating a child anchor or a pixbuf segment.
	(gtk_text_btree_create_child_anchor): new function
	(gtk_text_btree_unregister_child_anchor): new function

	* gtk/gtkmarshal.list: added VOID:OBJECT,INT,INT for the
	allocate_child signal on GtkTextLayout

	* gtk/gtktextiter.c (gtk_text_iter_get_pixbuf): fix bogus return
	values
	(gtk_text_iter_get_child_anchor): new function

	* gtk/gtktextbuffer.c (gtk_text_buffer_real_changed): Add a
	default handler for the changed signal, which calls
	gtk_text_buffer_set_modified(), instead of just always emitting
	changed then calling set_modified() manually. I guess this is
	maybe more flexible. It seems logical.
2000-11-03 20:40:57 +00:00

454 lines
13 KiB
C

/* gtktextchild.c - child pixmaps and widgets
*
* Copyright (c) 1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
* Copyright (c) 2000 Red Hat, Inc.
* Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
*
* This software is copyrighted by the Regents of the University of
* California, Sun Microsystems, Inc., and other parties. The
* following terms apply to all files associated with the software
* unless explicitly disclaimed in individual files.
*
* The authors hereby grant permission to use, copy, modify,
* distribute, and license this software and its documentation for any
* purpose, provided that existing copyright notices are retained in
* all copies and that this notice is included verbatim in any
* distributions. No written agreement, license, or royalty fee is
* required for any of the authorized uses. Modifications to this
* software may be copyrighted by their authors and need not follow
* the licensing terms described here, provided that the new terms are
* clearly indicated on the first page of each file where they apply.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* GOVERNMENT USE: If you are acquiring this software on behalf of the
* U.S. government, the Government shall have only "Restricted Rights"
* in the software and related documentation as defined in the Federal
* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
* are acquiring the software on behalf of the Department of Defense,
* the software shall be classified as "Commercial Computer Software"
* and the Government shall have only "Restricted Rights" as defined
* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
* foregoing, the authors grant the U.S. Government and others acting
* in its behalf permission to use and distribute the software in
* accordance with the terms specified in this license.
*
*/
#include "gtktextchild.h"
#include "gtktextbtree.h"
#include "gtktextlayout.h"
static GtkTextLineSegment *
pixbuf_segment_cleanup_func (GtkTextLineSegment *seg,
GtkTextLine *line)
{
/* nothing */
return seg;
}
static int
pixbuf_segment_delete_func (GtkTextLineSegment *seg,
GtkTextLine *line,
gboolean tree_gone)
{
if (seg->body.pixbuf.pixbuf)
g_object_unref (G_OBJECT (seg->body.pixbuf.pixbuf));
g_free (seg);
return 0;
}
static void
pixbuf_segment_check_func (GtkTextLineSegment *seg,
GtkTextLine *line)
{
if (seg->next == NULL)
g_error ("pixbuf segment is the last segment in a line");
if (seg->byte_count != 3)
g_error ("pixbuf segment has byte count of %d", seg->byte_count);
if (seg->char_count != 1)
g_error ("pixbuf segment has char count of %d", seg->char_count);
}
GtkTextLineSegmentClass gtk_text_pixbuf_type = {
"pixbuf", /* name */
FALSE, /* leftGravity */
NULL, /* splitFunc */
pixbuf_segment_delete_func, /* deleteFunc */
pixbuf_segment_cleanup_func, /* cleanupFunc */
NULL, /* lineChangeFunc */
pixbuf_segment_check_func /* checkFunc */
};
#define PIXBUF_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
+ sizeof (GtkTextPixbuf)))
GtkTextLineSegment *
_gtk_pixbuf_segment_new (GdkPixbuf *pixbuf)
{
GtkTextLineSegment *seg;
seg = g_malloc (PIXBUF_SEG_SIZE);
seg->type = &gtk_text_pixbuf_type;
seg->next = NULL;
seg->byte_count = 3; /* We convert to the 0xFFFD "unknown character",
a 3-byte sequence in UTF-8 */
seg->char_count = 1;
seg->body.pixbuf.pixbuf = pixbuf;
g_object_ref (G_OBJECT (pixbuf));
return seg;
}
static GtkTextLineSegment *
child_segment_cleanup_func (GtkTextLineSegment *seg,
GtkTextLine *line)
{
seg->body.child.line = line;
return seg;
}
static int
child_segment_delete_func (GtkTextLineSegment *seg,
GtkTextLine *line,
gboolean tree_gone)
{
GSList *tmp_list;
GSList *copy;
gtk_text_btree_unregister_child_anchor (seg->body.child.obj);
seg->body.child.tree = NULL;
seg->body.child.line = NULL;
/* avoid removing widgets while walking the list */
copy = g_slist_copy (seg->body.child.widgets);
tmp_list = copy;
while (tmp_list != NULL)
{
GtkWidget *child = tmp_list->data;
gtk_widget_destroy (child);
tmp_list = g_slist_next (tmp_list);
}
/* On removal from the widget's parents (GtkTextView),
* the widget should have been removed from the anchor.
*/
g_assert (seg->body.child.widgets == NULL);
g_slist_free (copy);
_gtk_widget_segment_unref (seg);
return 0;
}
static void
child_segment_check_func (GtkTextLineSegment *seg,
GtkTextLine *line)
{
if (seg->next == NULL)
g_error ("child segment is the last segment in a line");
if (seg->byte_count != 3)
g_error ("child segment has byte count of %d", seg->byte_count);
if (seg->char_count != 1)
g_error ("child segment has char count of %d", seg->char_count);
}
GtkTextLineSegmentClass gtk_text_child_type = {
"child-widget", /* name */
FALSE, /* leftGravity */
NULL, /* splitFunc */
child_segment_delete_func, /* deleteFunc */
child_segment_cleanup_func, /* cleanupFunc */
NULL, /* lineChangeFunc */
child_segment_check_func /* checkFunc */
};
#define WIDGET_SEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
+ sizeof (GtkTextChildBody)))
GtkTextLineSegment *
_gtk_widget_segment_new (void)
{
GtkTextLineSegment *seg;
seg = g_malloc (WIDGET_SEG_SIZE);
seg->type = &gtk_text_child_type;
seg->next = NULL;
seg->byte_count = 3; /* We convert to the 0xFFFD "unknown character",
* a 3-byte sequence in UTF-8
*/
seg->char_count = 1;
seg->body.child.obj = g_object_new (GTK_TYPE_TEXT_CHILD_ANCHOR, NULL);
seg->body.child.obj->segment = seg;
seg->body.child.widgets = NULL;
seg->body.child.tree = NULL;
seg->body.child.line = NULL;
return seg;
}
void
_gtk_widget_segment_add (GtkTextLineSegment *widget_segment,
GtkWidget *child)
{
g_return_if_fail (widget_segment->type = &gtk_text_child_type);
g_return_if_fail (widget_segment->body.child.tree != NULL);
g_object_ref (G_OBJECT (child));
widget_segment->body.child.widgets =
g_slist_prepend (widget_segment->body.child.widgets,
child);
}
void
_gtk_widget_segment_remove (GtkTextLineSegment *widget_segment,
GtkWidget *child)
{
g_return_if_fail (widget_segment->type = &gtk_text_child_type);
g_return_if_fail (widget_segment->body.child.tree != NULL);
widget_segment->body.child.widgets =
g_slist_remove (widget_segment->body.child.widgets,
child);
g_object_unref (G_OBJECT (child));
}
void
_gtk_widget_segment_ref (GtkTextLineSegment *widget_segment)
{
g_assert (widget_segment->type = &gtk_text_child_type);
g_object_ref (G_OBJECT (widget_segment->body.child.obj));
}
void
_gtk_widget_segment_unref (GtkTextLineSegment *widget_segment)
{
g_assert (widget_segment->type = &gtk_text_child_type);
g_object_unref (G_OBJECT (widget_segment->body.child.obj));
}
GtkTextLayout*
_gtk_anchored_child_get_layout (GtkWidget *child)
{
return gtk_object_get_data (GTK_OBJECT (child), "gtk-text-child-anchor-layout");
}
static void
_gtk_anchored_child_set_layout (GtkWidget *child,
GtkTextLayout *layout)
{
gtk_object_set_data (GTK_OBJECT (child),
"gtk-text-child-anchor-layout",
layout);
}
static void gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor);
static void gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass);
static void gtk_text_child_anchor_finalize (GObject *obj);
static gpointer parent_class = NULL;
GType
gtk_text_child_anchor_get_type (void)
{
static GType object_type = 0;
if (!object_type)
{
static const GTypeInfo object_info =
{
sizeof (GtkTextChildAnchorClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gtk_text_child_anchor_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkTextChildAnchor),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_text_child_anchor_init,
};
object_type = g_type_register_static (G_TYPE_OBJECT,
"GtkTextChildAnchor",
&object_info, 0);
}
return object_type;
}
static void
gtk_text_child_anchor_init (GtkTextChildAnchor *child_anchor)
{
child_anchor->segment = NULL;
}
static void
gtk_text_child_anchor_class_init (GtkTextChildAnchorClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gtk_text_child_anchor_finalize;
}
static void
gtk_text_child_anchor_finalize (GObject *obj)
{
GtkTextChildAnchor *anchor;
GSList *tmp_list;
GtkTextLineSegment *seg;
anchor = GTK_TEXT_CHILD_ANCHOR (obj);
seg = anchor->segment;
if (seg->body.child.tree != NULL)
{
g_warning ("Someone removed a reference to a GtkTextChildAnchor "
"they didn't own; the anchor is still in the text buffer "
"and the refcount is 0.");
return;
}
tmp_list = seg->body.child.widgets;
while (tmp_list)
{
g_object_unref (G_OBJECT (tmp_list->data));
tmp_list = g_slist_next (tmp_list);
}
g_slist_free (seg->body.child.widgets);
g_free (seg);
anchor->segment = NULL;
}
GList*
gtk_text_child_anchor_get_widgets (GtkTextChildAnchor *anchor)
{
GtkTextLineSegment *seg = anchor->segment;
GList *list = NULL;
GSList *iter;
g_return_val_if_fail (seg->type = &gtk_text_child_type, NULL);
iter = seg->body.child.widgets;
while (iter != NULL)
{
list = g_list_prepend (list, iter->data);
iter = g_slist_next (iter);
}
/* Order is not relevant, so we don't need to reverse the list
* again.
*/
return list;
}
gboolean
gtk_text_child_anchor_get_deleted (GtkTextChildAnchor *anchor)
{
GtkTextLineSegment *seg = anchor->segment;
g_return_val_if_fail (seg->type = &gtk_text_child_type, TRUE);
return seg->body.child.tree == NULL;
}
void
gtk_text_child_anchor_register_child (GtkTextChildAnchor *anchor,
GtkWidget *child,
GtkTextLayout *layout)
{
g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
g_return_if_fail (GTK_IS_WIDGET (child));
_gtk_anchored_child_set_layout (child, layout);
_gtk_widget_segment_add (anchor->segment, child);
gtk_text_child_anchor_queue_resize (anchor, layout);
}
void
gtk_text_child_anchor_unregister_child (GtkTextChildAnchor *anchor,
GtkWidget *child)
{
g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (_gtk_anchored_child_get_layout (child) != NULL);
gtk_text_child_anchor_queue_resize (anchor,
_gtk_anchored_child_get_layout (child));
_gtk_anchored_child_set_layout (child, NULL);
_gtk_widget_segment_remove (anchor->segment, child);
}
void
gtk_text_child_anchor_queue_resize (GtkTextChildAnchor *anchor,
GtkTextLayout *layout)
{
GtkTextIter start;
GtkTextIter end;
GtkTextLineSegment *seg;
g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
seg = anchor->segment;
g_return_if_fail (seg->body.child.tree != NULL);
gtk_text_buffer_get_iter_at_child_anchor (layout->buffer,
&start, anchor);
end = start;
gtk_text_iter_next_char (&end);
gtk_text_layout_invalidate (layout, &start, &end);
}