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gtk2/gtk/gtktextbuffer.c
Shivram U b719e5d7a8 Check if the owner got is of type GDK_WINDOW_FOREIGN. If so the owner is 
Mon May 28 13:28:10  Shivram U  <shivaram.upadhyayula@wipro.com>

	* gtk/gtktextbuffer.c (selection_data_get_buffer): Check if the owner
	got is of type GDK_WINDOW_FOREIGN. If so the owner is not in-process,
	and so return NULL.
2002-05-30 09:43:09 +00:00

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/* GTK - The GIMP Toolkit
* gtktextbuffer.c Copyright (C) 2000 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <string.h>
#include <stdarg.h>
#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
#include "gtkclipboard.h"
#include "gtkinvisible.h"
#include "gtkmarshalers.h"
#include "gtksignal.h"
#include "gtktextbuffer.h"
#include "gtktextbtree.h"
#include "gtktextiterprivate.h"
#include <string.h>
typedef struct _ClipboardRequest ClipboardRequest;
struct _ClipboardRequest
{
GtkTextBuffer *buffer;
gboolean interactive;
gboolean default_editable;
gboolean is_clipboard;
gboolean replace_selection;
};
enum {
INSERT_TEXT,
INSERT_PIXBUF,
INSERT_CHILD_ANCHOR,
DELETE_RANGE,
CHANGED,
MODIFIED_CHANGED,
MARK_SET,
MARK_DELETED,
APPLY_TAG,
REMOVE_TAG,
BEGIN_USER_ACTION,
END_USER_ACTION,
LAST_SIGNAL
};
enum {
ARG_0,
LAST_ARG
};
enum {
TARGET_STRING,
TARGET_TEXT,
TARGET_COMPOUND_TEXT,
TARGET_UTF8_STRING,
TARGET_TEXT_BUFFER_CONTENTS
};
static void gtk_text_buffer_init (GtkTextBuffer *tkxt_buffer);
static void gtk_text_buffer_class_init (GtkTextBufferClass *klass);
static void gtk_text_buffer_finalize (GObject *object);
static void gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len);
static void gtk_text_buffer_real_insert_pixbuf (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPixbuf *pixbuf);
static void gtk_text_buffer_real_insert_anchor (GtkTextBuffer *buffer,
GtkTextIter *iter,
GtkTextChildAnchor *anchor);
static void gtk_text_buffer_real_delete_range (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end);
static void gtk_text_buffer_real_apply_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start_char,
const GtkTextIter *end_char);
static void gtk_text_buffer_real_remove_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start_char,
const GtkTextIter *end_char);
static void gtk_text_buffer_real_changed (GtkTextBuffer *buffer);
static GtkTextBTree* get_btree (GtkTextBuffer *buffer);
static void free_log_attr_cache (GtkTextLogAttrCache *cache);
static void remove_all_clipboard_contents_buffers (GtkTextBuffer *buffer);
static void remove_all_selection_clipboards (GtkTextBuffer *buffer);
static void update_selection_clipboards (GtkTextBuffer *buffer);
static GObjectClass *parent_class = NULL;
static guint signals[LAST_SIGNAL] = { 0 };
GType
gtk_text_buffer_get_type (void)
{
static GType our_type = 0;
if (our_type == 0)
{
static const GTypeInfo our_info =
{
sizeof (GtkTextBufferClass),
(GBaseInitFunc) NULL,
(GBaseFinalizeFunc) NULL,
(GClassInitFunc) gtk_text_buffer_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkTextBuffer),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_text_buffer_init
};
our_type = g_type_register_static (G_TYPE_OBJECT,
"GtkTextBuffer",
&our_info,
0);
}
return our_type;
}
static void
gtk_text_buffer_class_init (GtkTextBufferClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
object_class->finalize = gtk_text_buffer_finalize;
klass->insert_text = gtk_text_buffer_real_insert_text;
klass->insert_pixbuf = gtk_text_buffer_real_insert_pixbuf;
klass->insert_child_anchor = gtk_text_buffer_real_insert_anchor;
klass->delete_range = gtk_text_buffer_real_delete_range;
klass->apply_tag = gtk_text_buffer_real_apply_tag;
klass->remove_tag = gtk_text_buffer_real_remove_tag;
klass->changed = gtk_text_buffer_real_changed;
signals[INSERT_TEXT] =
g_signal_new ("insert_text",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, insert_text),
NULL, NULL,
_gtk_marshal_VOID__BOXED_STRING_INT,
GTK_TYPE_NONE,
3,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GTK_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE,
GTK_TYPE_INT);
signals[INSERT_PIXBUF] =
g_signal_new ("insert_pixbuf",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, insert_pixbuf),
NULL, NULL,
_gtk_marshal_VOID__BOXED_OBJECT,
GTK_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GDK_TYPE_PIXBUF);
signals[INSERT_CHILD_ANCHOR] =
g_signal_new ("insert_child_anchor",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, insert_child_anchor),
NULL, NULL,
_gtk_marshal_VOID__BOXED_OBJECT,
GTK_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GTK_TYPE_TEXT_CHILD_ANCHOR);
signals[DELETE_RANGE] =
g_signal_new ("delete_range",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, delete_range),
NULL, NULL,
_gtk_marshal_VOID__BOXED_BOXED,
GTK_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE);
signals[CHANGED] =
g_signal_new ("changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, changed),
NULL, NULL,
_gtk_marshal_VOID__VOID,
GTK_TYPE_NONE,
0);
signals[MODIFIED_CHANGED] =
g_signal_new ("modified_changed",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, modified_changed),
NULL, NULL,
_gtk_marshal_VOID__VOID,
GTK_TYPE_NONE,
0);
signals[MARK_SET] =
g_signal_new ("mark_set",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, mark_set),
NULL, NULL,
_gtk_marshal_VOID__BOXED_OBJECT,
GTK_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER,
GTK_TYPE_TEXT_MARK);
signals[MARK_DELETED] =
g_signal_new ("mark_deleted",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, mark_deleted),
NULL, NULL,
_gtk_marshal_VOID__OBJECT,
GTK_TYPE_NONE,
1,
GTK_TYPE_TEXT_MARK);
signals[APPLY_TAG] =
g_signal_new ("apply_tag",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, apply_tag),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_BOXED_BOXED,
GTK_TYPE_NONE,
3,
GTK_TYPE_TEXT_TAG,
GTK_TYPE_TEXT_ITER,
GTK_TYPE_TEXT_ITER);
signals[REMOVE_TAG] =
g_signal_new ("remove_tag",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, remove_tag),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_BOXED_BOXED,
GTK_TYPE_NONE,
3,
GTK_TYPE_TEXT_TAG,
GTK_TYPE_TEXT_ITER,
GTK_TYPE_TEXT_ITER);
signals[BEGIN_USER_ACTION] =
g_signal_new ("begin_user_action",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, begin_user_action),
NULL, NULL,
_gtk_marshal_VOID__VOID,
GTK_TYPE_NONE,
0);
signals[END_USER_ACTION] =
g_signal_new ("end_user_action",
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, end_user_action),
NULL, NULL,
_gtk_marshal_VOID__VOID,
GTK_TYPE_NONE,
0);
}
static void
gtk_text_buffer_init (GtkTextBuffer *buffer)
{
buffer->clipboard_contents_buffers = NULL;
}
/**
* gtk_text_buffer_new:
* @table: a tag table, or NULL to create a new one
*
* Creates a new text buffer.
*
* Return value: a new text buffer
**/
GtkTextBuffer*
gtk_text_buffer_new (GtkTextTagTable *table)
{
GtkTextBuffer *text_buffer;
text_buffer = GTK_TEXT_BUFFER (g_object_new (gtk_text_buffer_get_type (), NULL));
if (table)
{
text_buffer->tag_table = table;
g_object_ref (G_OBJECT (text_buffer->tag_table));
_gtk_text_tag_table_add_buffer (table, text_buffer);
}
return text_buffer;
}
static void
gtk_text_buffer_finalize (GObject *object)
{
GtkTextBuffer *buffer;
buffer = GTK_TEXT_BUFFER (object);
remove_all_clipboard_contents_buffers (buffer);
remove_all_selection_clipboards (buffer);
if (buffer->tag_table)
{
_gtk_text_tag_table_remove_buffer (buffer->tag_table, buffer);
g_object_unref (G_OBJECT (buffer->tag_table));
buffer->tag_table = NULL;
}
if (buffer->btree)
{
_gtk_text_btree_unref (buffer->btree);
buffer->btree = NULL;
}
if (buffer->log_attr_cache)
free_log_attr_cache (buffer->log_attr_cache);
buffer->log_attr_cache = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GtkTextTagTable*
get_table (GtkTextBuffer *buffer)
{
if (buffer->tag_table == NULL)
{
buffer->tag_table = gtk_text_tag_table_new ();
_gtk_text_tag_table_add_buffer (buffer->tag_table, buffer);
}
return buffer->tag_table;
}
static GtkTextBTree*
get_btree (GtkTextBuffer *buffer)
{
if (buffer->btree == NULL)
buffer->btree = _gtk_text_btree_new (gtk_text_buffer_get_tag_table (buffer),
buffer);
return buffer->btree;
}
GtkTextBTree*
_gtk_text_buffer_get_btree (GtkTextBuffer *buffer)
{
return get_btree (buffer);
}
/**
* gtk_text_buffer_get_tag_table:
* @buffer: a #GtkTextBuffer
*
* Get the #GtkTextTagTable associated with this buffer.
*
* Return value: the buffer's tag table
**/
GtkTextTagTable*
gtk_text_buffer_get_tag_table (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
return get_table (buffer);
}
/**
* gtk_text_buffer_set_text:
* @buffer: a #GtkTextBuffer
* @text: UTF-8 text to insert
* @len: length of @text in bytes
*
* Deletes current contents of @buffer, and inserts @text instead. If
* @len is -1, @text must be nul-terminated. @text must be valid UTF-8.
**/
void
gtk_text_buffer_set_text (GtkTextBuffer *buffer,
const gchar *text,
gint len)
{
GtkTextIter start, end;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (text != NULL);
if (len < 0)
len = strlen (text);
gtk_text_buffer_get_bounds (buffer, &start, &end);
gtk_text_buffer_delete (buffer, &start, &end);
if (len > 0)
{
gtk_text_buffer_get_iter_at_offset (buffer, &start, 0);
gtk_text_buffer_insert (buffer, &start, text, len);
}
}
/*
* Insertion
*/
static void
gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
_gtk_text_btree_insert (iter, text, len);
g_signal_emit (G_OBJECT (buffer), signals[CHANGED], 0);
}
static void
gtk_text_buffer_emit_insert (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (text != NULL);
if (len < 0)
len = strlen (text);
g_return_if_fail (g_utf8_validate (text, len, NULL));
if (len > 0)
{
g_signal_emit (G_OBJECT (buffer), signals[INSERT_TEXT], 0,
iter, text, len);
}
}
/**
* gtk_text_buffer_insert:
* @buffer: a #GtkTextBuffer
* @iter: a position in the buffer
* @text: UTF-8 format text to insert
* @len: length of text in bytes, or -1
*
* Inserts @len bytes of @text at position @iter. If @len is -1,
* @text must be nul-terminated and will be inserted in its
* entirety. Emits the "insert_text" signal; insertion actually occurs
* in the default handler for the signal. @iter is invalidated when
* insertion occurs (because the buffer contents change), but the
* default signal handler revalidates it to point to the end of the
* inserted text.
*
**/
void
gtk_text_buffer_insert (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (text != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
gtk_text_buffer_emit_insert (buffer, iter, text, len);
}
/**
* gtk_text_buffer_insert_at_cursor:
* @buffer: a #GtkTextBuffer
* @text: some text in UTF-8 format
* @len: length of text, in bytes
*
* Simply calls gtk_text_buffer_insert (), using the current
* cursor position as the insertion point.
**/
void
gtk_text_buffer_insert_at_cursor (GtkTextBuffer *buffer,
const gchar *text,
gint len)
{
GtkTextIter iter;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (text != NULL);
gtk_text_buffer_get_iter_at_mark (buffer, &iter,
gtk_text_buffer_get_mark (buffer,
"insert"));
gtk_text_buffer_insert (buffer, &iter, text, len);
}
/**
* gtk_text_buffer_insert_interactive:
* @buffer: a #GtkTextBuffer
* @iter: a position in @buffer
* @text: some UTF-8 text
* @len: length of text in bytes, or -1
* @default_editable: default editability of buffer
*
* Like gtk_text_buffer_insert (), but the insertion will not occur if
* @iter is at a non-editable location in the buffer. Usually you
* want to prevent insertions at ineditable locations if the insertion
* results from a user action (is interactive).
*
* @default_editable indicates the editability of text that doesn't
* have a tag affecting editability applied to it. Typically the
* result of gtk_text_view_get_editable() is appropriate here.
*
* Return value: whether text was actually inserted
**/
gboolean
gtk_text_buffer_insert_interactive (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
gboolean default_editable)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (text != NULL, FALSE);
g_return_val_if_fail (gtk_text_iter_get_buffer (iter) == buffer, FALSE);
if (gtk_text_iter_can_insert (iter, default_editable))
{
gtk_text_buffer_begin_user_action (buffer);
gtk_text_buffer_emit_insert (buffer, iter, text, len);
gtk_text_buffer_end_user_action (buffer);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_text_buffer_insert_interactive_at_cursor:
* @buffer: a #GtkTextBuffer
* @text: text in UTF-8 format
* @len: length of text in bytes, or -1
* @default_editable: default editability of buffer
*
* Calls gtk_text_buffer_insert_interactive () at the cursor
* position.
*
* @default_editable indicates the editability of text that doesn't
* have a tag affecting editability applied to it. Typically the
* result of gtk_text_view_get_editable() is appropriate here.
*
* Return value: whether text was actually inserted
**/
gboolean
gtk_text_buffer_insert_interactive_at_cursor (GtkTextBuffer *buffer,
const gchar *text,
gint len,
gboolean default_editable)
{
GtkTextIter iter;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (text != NULL, FALSE);
gtk_text_buffer_get_iter_at_mark (buffer, &iter,
gtk_text_buffer_get_mark (buffer,
"insert"));
return gtk_text_buffer_insert_interactive (buffer, &iter, text, len,
default_editable);
}
static gboolean
possibly_not_text (gunichar ch,
gpointer user_data)
{
return ch == GTK_TEXT_UNKNOWN_CHAR;
}
static void
insert_text_range (GtkTextBuffer *buffer,
GtkTextIter *iter,
const GtkTextIter *orig_start,
const GtkTextIter *orig_end,
gboolean interactive)
{
gchar *text;
text = gtk_text_iter_get_text (orig_start, orig_end);
gtk_text_buffer_emit_insert (buffer, iter, text, -1);
g_free (text);
}
typedef struct _Range Range;
struct _Range
{
GtkTextBuffer *buffer;
GtkTextMark *start_mark;
GtkTextMark *end_mark;
GtkTextMark *whole_end_mark;
GtkTextIter *range_start;
GtkTextIter *range_end;
GtkTextIter *whole_end;
};
static Range*
save_range (GtkTextIter *range_start,
GtkTextIter *range_end,
GtkTextIter *whole_end)
{
Range *r;
r = g_new (Range, 1);
r->buffer = gtk_text_iter_get_buffer (range_start);
g_object_ref (G_OBJECT (r->buffer));
r->start_mark =
gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (range_start),
NULL,
range_start,
FALSE);
r->end_mark =
gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (range_start),
NULL,
range_end,
TRUE);
r->whole_end_mark =
gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (range_start),
NULL,
whole_end,
TRUE);
r->range_start = range_start;
r->range_end = range_end;
r->whole_end = whole_end;
return r;
}
static void
restore_range (Range *r)
{
gtk_text_buffer_get_iter_at_mark (r->buffer,
r->range_start,
r->start_mark);
gtk_text_buffer_get_iter_at_mark (r->buffer,
r->range_end,
r->end_mark);
gtk_text_buffer_get_iter_at_mark (r->buffer,
r->whole_end,
r->whole_end_mark);
gtk_text_buffer_delete_mark (r->buffer, r->start_mark);
gtk_text_buffer_delete_mark (r->buffer, r->end_mark);
gtk_text_buffer_delete_mark (r->buffer, r->whole_end_mark);
/* Due to the gravities on the marks, the ordering could have
* gotten mangled; we switch to an empty range in that
* case
*/
if (gtk_text_iter_compare (r->range_start, r->range_end) > 0)
*r->range_start = *r->range_end;
if (gtk_text_iter_compare (r->range_end, r->whole_end) > 0)
*r->range_end = *r->whole_end;
g_object_unref (G_OBJECT (r->buffer));
g_free (r);
}
static void
insert_range_untagged (GtkTextBuffer *buffer,
GtkTextIter *iter,
const GtkTextIter *orig_start,
const GtkTextIter *orig_end,
gboolean interactive)
{
GtkTextIter range_start;
GtkTextIter range_end;
GtkTextIter start, end;
GtkTextBuffer *src_buffer;
Range *r;
if (gtk_text_iter_equal (orig_start, orig_end))
return;
start = *orig_start;
end = *orig_end;
src_buffer = gtk_text_iter_get_buffer (&start);
range_start = start;
range_end = start;
while (TRUE)
{
if (gtk_text_iter_equal (&range_start, &range_end))
{
/* Figure out how to move forward */
g_assert (gtk_text_iter_compare (&range_end, &end) <= 0);
if (gtk_text_iter_equal (&range_end, &end))
{
/* nothing left to do */
break;
}
else if (gtk_text_iter_get_char (&range_end) == GTK_TEXT_UNKNOWN_CHAR)
{
GdkPixbuf *pixbuf = NULL;
GtkTextChildAnchor *anchor = NULL;
pixbuf = gtk_text_iter_get_pixbuf (&range_end);
anchor = gtk_text_iter_get_child_anchor (&range_end);
if (pixbuf)
{
r = save_range (&range_start,
&range_end,
&end);
gtk_text_buffer_insert_pixbuf (buffer,
iter,
pixbuf);
restore_range (r);
r = NULL;
gtk_text_iter_forward_char (&range_end);
range_start = range_end;
}
else if (anchor)
{
/* Just skip anchors */
gtk_text_iter_forward_char (&range_end);
range_start = range_end;
}
else
{
/* The GTK_TEXT_UNKNOWN_CHAR was in a text segment, so
* keep going.
*/
gtk_text_iter_forward_find_char (&range_end,
possibly_not_text, NULL,
&end);
g_assert (gtk_text_iter_compare (&range_end, &end) <= 0);
}
}
else
{
/* Text segment starts here, so forward search to
* find its possible endpoint
*/
gtk_text_iter_forward_find_char (&range_end,
possibly_not_text, NULL,
&end);
g_assert (gtk_text_iter_compare (&range_end, &end) <= 0);
}
}
else
{
r = save_range (&range_start,
&range_end,
&end);
insert_text_range (buffer,
iter,
&range_start,
&range_end,
interactive);
restore_range (r);
r = NULL;
range_start = range_end;
}
}
}
static void
insert_range_not_inside_self (GtkTextBuffer *buffer,
GtkTextIter *iter,
const GtkTextIter *orig_start,
const GtkTextIter *orig_end,
gboolean interactive)
{
/* Find each range of uniformly-tagged text, insert it,
* then apply the tags.
*/
GtkTextIter start = *orig_start;
GtkTextIter end = *orig_end;
GtkTextIter range_start;
GtkTextIter range_end;
GtkTextBuffer *src_buffer;
if (gtk_text_iter_equal (orig_start, orig_end))
return;
src_buffer = gtk_text_iter_get_buffer (orig_start);
gtk_text_iter_order (&start, &end);
range_start = start;
range_end = start;
while (TRUE)
{
gint start_offset;
GtkTextIter start_iter;
GSList *tags;
GSList *tmp_list;
Range *r;
if (gtk_text_iter_equal (&range_start, &end))
break; /* All done */
g_assert (gtk_text_iter_compare (&range_start, &end) < 0);
gtk_text_iter_forward_to_tag_toggle (&range_end, NULL);
g_assert (!gtk_text_iter_equal (&range_start, &range_end));
/* Clamp to the end iterator */
if (gtk_text_iter_compare (&range_end, &end) > 0)
range_end = end;
/* We have a range with unique tags; insert it, and
* apply all tags.
*/
start_offset = gtk_text_iter_get_offset (iter);
r = save_range (&range_start, &range_end, &end);
insert_range_untagged (buffer, iter, &range_start, &range_end, interactive);
restore_range (r);
r = NULL;
gtk_text_buffer_get_iter_at_offset (buffer, &start_iter, start_offset);
tags = gtk_text_iter_get_tags (&range_start);
tmp_list = tags;
while (tmp_list != NULL)
{
gtk_text_buffer_apply_tag (buffer,
tmp_list->data,
&start_iter,
iter);
tmp_list = g_slist_next (tmp_list);
}
g_slist_free (tags);
range_start = range_end;
}
}
static void
gtk_text_buffer_real_insert_range (GtkTextBuffer *buffer,
GtkTextIter *iter,
const GtkTextIter *orig_start,
const GtkTextIter *orig_end,
gboolean interactive)
{
GtkTextBuffer *src_buffer;
/* Find each range of uniformly-tagged text, insert it,
* then apply the tags.
*/
if (gtk_text_iter_equal (orig_start, orig_end))
return;
if (interactive)
gtk_text_buffer_begin_user_action (buffer);
src_buffer = gtk_text_iter_get_buffer (orig_start);
if (gtk_text_iter_get_buffer (iter) != src_buffer ||
!gtk_text_iter_in_range (iter, orig_start, orig_end))
{
insert_range_not_inside_self (buffer, iter, orig_start, orig_end, interactive);
}
else
{
/* If you insert a range into itself, it could loop infinitely
* because the region being copied keeps growing as we insert. So
* we have to separately copy the range before and after
* the insertion point.
*/
GtkTextIter start = *orig_start;
GtkTextIter end = *orig_end;
GtkTextIter range_start;
GtkTextIter range_end;
Range *first_half;
Range *second_half;
gtk_text_iter_order (&start, &end);
range_start = start;
range_end = *iter;
first_half = save_range (&range_start, &range_end, &end);
range_start = *iter;
range_end = end;
second_half = save_range (&range_start, &range_end, &end);
restore_range (first_half);
insert_range_not_inside_self (buffer, iter, &range_start, &range_end, interactive);
restore_range (second_half);
insert_range_not_inside_self (buffer, iter, &range_start, &range_end, interactive);
}
if (interactive)
gtk_text_buffer_end_user_action (buffer);
}
/**
* gtk_text_buffer_insert_range:
* @buffer: a #GtkTextBuffer
* @iter: a position in @buffer
* @start: a position in a #GtkTextBuffer
* @end: another position in the same buffer as @start
*
* Copies text, tags, and pixbufs between @start and @end (the order
* of @start and @end doesn't matter) and inserts the copy at @iter.
* Used instead of simply getting/inserting text because it preserves
* images and tags. If @start and @end are in a different buffer from
* @buffer, the two buffers must share the same tag table.
*
* Implemented via emissions of the insert_text and apply_tag signals,
* so expect those.
**/
void
gtk_text_buffer_insert_range (GtkTextBuffer *buffer,
GtkTextIter *iter,
const GtkTextIter *start,
const GtkTextIter *end)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) ==
gtk_text_iter_get_buffer (end));
g_return_if_fail (gtk_text_iter_get_buffer (start)->tag_table ==
buffer->tag_table);
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
gtk_text_buffer_real_insert_range (buffer, iter, start, end, FALSE);
}
/**
* gtk_text_buffer_insert_range_interactive:
* @buffer: a #GtkTextBuffer
* @iter: a position in @buffer
* @start: a position in a #GtkTextBuffer
* @end: another position in the same buffer as @start
* @default_editable: default editability of the buffer
*
* Same as gtk_text_buffer_insert_range(), but does nothing if the
* insertion point isn't editable. The @default_editable parameter
* indicates whether the text is editable at @iter if no tags
* enclosing @iter affect editability. Typically the result of
* gtk_text_view_get_editable() is appropriate here.
*
* Returns: whether an insertion was possible at @iter
**/
gboolean
gtk_text_buffer_insert_range_interactive (GtkTextBuffer *buffer,
GtkTextIter *iter,
const GtkTextIter *start,
const GtkTextIter *end,
gboolean default_editable)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (start != NULL, FALSE);
g_return_val_if_fail (end != NULL, FALSE);
g_return_val_if_fail (gtk_text_iter_get_buffer (start) ==
gtk_text_iter_get_buffer (end), FALSE);
g_return_val_if_fail (gtk_text_iter_get_buffer (start)->tag_table ==
buffer->tag_table, FALSE);
if (gtk_text_iter_can_insert (iter, default_editable))
{
gtk_text_buffer_real_insert_range (buffer, iter, start, end, TRUE);
return TRUE;
}
else
return FALSE;
}
/**
* gtk_text_buffer_insert_with_tags:
* @buffer: a #GtkTextBuffer
* @iter: an iterator in @buffer
* @text: UTF-8 text
* @len: length of @text, or -1
* @first_tag: first tag to apply to @text
* @Varargs: NULL-terminated list of tags to apply
*
* Inserts @text into @buffer at @iter, applying the list of tags to
* the newly-inserted text. The last tag specified must be NULL to
* terminate the list. Equivalent to calling gtk_text_buffer_insert (),
* then gtk_text_buffer_apply_tag () on the inserted text;
* gtk_text_buffer_insert_with_tags () is just a convenience function.
**/
void
gtk_text_buffer_insert_with_tags (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
GtkTextTag *first_tag,
...)
{
gint start_offset;
GtkTextIter start;
va_list args;
GtkTextTag *tag;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (text != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
start_offset = gtk_text_iter_get_offset (iter);
gtk_text_buffer_insert (buffer, iter, text, len);
if (first_tag == NULL)
return;
gtk_text_buffer_get_iter_at_offset (buffer, &start, start_offset);
va_start (args, first_tag);
tag = first_tag;
while (tag)
{
gtk_text_buffer_apply_tag (buffer, tag, &start, iter);
tag = va_arg (args, GtkTextTag*);
}
va_end (args);
}
/**
* gtk_text_buffer_insert_with_tags_by_name:
* @buffer: a #GtkTextBuffer
* @iter: position in @buffer
* @text: UTF-8 text
* @len: length of @text, or -1
* @first_tag_name: name of a tag to apply to @text
* @Varargs: more tag names
*
* Same as gtk_text_buffer_insert_with_tags (), but allows you
* to pass in tag names instead of tag objects.
**/
void
gtk_text_buffer_insert_with_tags_by_name (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
const gchar *first_tag_name,
...)
{
gint start_offset;
GtkTextIter start;
va_list args;
const gchar *tag_name;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (text != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
start_offset = gtk_text_iter_get_offset (iter);
gtk_text_buffer_insert (buffer, iter, text, len);
if (first_tag_name == NULL)
return;
gtk_text_buffer_get_iter_at_offset (buffer, &start, start_offset);
va_start (args, first_tag_name);
tag_name = first_tag_name;
while (tag_name)
{
GtkTextTag *tag;
tag = gtk_text_tag_table_lookup (buffer->tag_table,
tag_name);
if (tag == NULL)
{
g_warning ("%s: no tag with name '%s'!", G_STRLOC, tag_name);
return;
}
gtk_text_buffer_apply_tag (buffer, tag, &start, iter);
tag_name = va_arg (args, const gchar*);
}
va_end (args);
}
/*
* Deletion
*/
static void
gtk_text_buffer_real_delete_range (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
_gtk_text_btree_delete (start, end);
/* may have deleted the selection... */
update_selection_clipboards (buffer);
g_signal_emit (G_OBJECT (buffer), signals[CHANGED], 0);
}
static void
gtk_text_buffer_emit_delete (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
if (gtk_text_iter_equal (start, end))
return;
gtk_text_iter_order (start, end);
g_signal_emit (G_OBJECT (buffer),
signals[DELETE_RANGE],
0,
start, end);
}
/**
* gtk_text_buffer_delete:
* @buffer: a #GtkTextBuffer
* @start: a position in @buffer
* @end: another position in @buffer
*
* Deletes text between @start and @end. The order of @start and @end
* is not actually relevant; gtk_text_buffer_delete () will reorder
* them. This function actually emits the "delete_range" signal, and
* the default handler of that signal deletes the text. Because the
* buffer is modified, all outstanding iterators become invalid after
* calling this function; however, the @start and @end will be
* re-initialized to point to the location where text was deleted.
*
**/
void
gtk_text_buffer_delete (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) == buffer);
g_return_if_fail (gtk_text_iter_get_buffer (end) == buffer);
gtk_text_buffer_emit_delete (buffer, start, end);
}
/**
* gtk_text_buffer_delete_interactive:
* @buffer: a #GtkTextBuffer
* @start_iter: start of range to delete
* @end_iter: end of range
* @default_editable: whether the buffer is editable by default
*
* Deletes all <emphasis>editable</emphasis> text in the given range.
* Calls gtk_text_buffer_delete () for each editable sub-range of
* [@start,@end). @start and @end are revalidated to point to
* the location of the last deleted range, or left untouched if
* no text was deleted.
*
* Return value: whether some text was actually deleted
**/
gboolean
gtk_text_buffer_delete_interactive (GtkTextBuffer *buffer,
GtkTextIter *start_iter,
GtkTextIter *end_iter,
gboolean default_editable)
{
GtkTextMark *end_mark;
GtkTextMark *start_mark;
GtkTextIter iter;
gboolean current_state;
gboolean deleted_stuff = FALSE;
/* Delete all editable text in the range start_iter, end_iter */
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (start_iter != NULL, FALSE);
g_return_val_if_fail (end_iter != NULL, FALSE);
g_return_val_if_fail (gtk_text_iter_get_buffer (start_iter) == buffer, FALSE);
g_return_val_if_fail (gtk_text_iter_get_buffer (end_iter) == buffer, FALSE);
gtk_text_buffer_begin_user_action (buffer);
gtk_text_iter_order (start_iter, end_iter);
start_mark = gtk_text_buffer_create_mark (buffer, NULL,
start_iter, TRUE);
end_mark = gtk_text_buffer_create_mark (buffer, NULL,
end_iter, FALSE);
iter = *start_iter;
current_state = gtk_text_iter_editable (&iter, default_editable);
while (TRUE)
{
gboolean new_state;
gboolean done = FALSE;
GtkTextIter end;
gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
gtk_text_buffer_get_iter_at_mark (buffer, &end, end_mark);
if (gtk_text_iter_compare (&iter, &end) >= 0)
{
done = TRUE;
iter = end; /* clamp to the last boundary */
}
new_state = gtk_text_iter_editable (&iter, default_editable);
if (current_state == new_state)
{
if (done)
{
if (current_state)
{
/* We're ending an editable region. Delete said region. */
GtkTextIter start;
gtk_text_buffer_get_iter_at_mark (buffer, &start, start_mark);
gtk_text_buffer_emit_delete (buffer, &start, &iter);
deleted_stuff = TRUE;
/* revalidate user's iterators. */
*start_iter = start;
*end_iter = iter;
}
break;
}
else
continue;
}
if (current_state && !new_state)
{
/* End of an editable region. Delete it. */
GtkTextIter start;
gtk_text_buffer_get_iter_at_mark (buffer, &start, start_mark);
gtk_text_buffer_emit_delete (buffer, &start, &iter);
current_state = FALSE;
deleted_stuff = TRUE;
/* revalidate user's iterators. */
*start_iter = start;
*end_iter = iter;
}
else
{
/* We are at the start of an editable region. We won't be deleting
* the previous region. Move start mark to start of this region.
*/
g_assert (!current_state && new_state);
gtk_text_buffer_move_mark (buffer, start_mark,
&iter);
current_state = TRUE;
}
if (done)
break;
}
gtk_text_buffer_delete_mark (buffer, start_mark);
gtk_text_buffer_delete_mark (buffer, end_mark);
gtk_text_buffer_end_user_action (buffer);
return deleted_stuff;
}
/*
* Extracting textual buffer contents
*/
/**
* gtk_text_buffer_get_text:
* @buffer: a #GtkTextBuffer
* @start: start of a range
* @end: end of a range
* @include_hidden_chars: whether to include invisible text
*
* Returns the text in the range [@start,@end). Excludes undisplayed
* text (text marked with tags that set the invisibility attribute) if
* @include_hidden_chars is FALSE. Does not include characters
* representing embedded images, so byte and character indexes into
* the returned string do <emphasis>not</emphasis> correspond to byte
* and character indexes into the buffer. Contrast with
* gtk_text_buffer_get_slice ().
*
* Return value: an allocated UTF-8 string
**/
gchar*
gtk_text_buffer_get_text (GtkTextBuffer *buffer,
const GtkTextIter *start,
const GtkTextIter *end,
gboolean include_hidden_chars)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (start != NULL, NULL);
g_return_val_if_fail (end != NULL, NULL);
g_return_val_if_fail (gtk_text_iter_get_buffer (start) == buffer, NULL);
g_return_val_if_fail (gtk_text_iter_get_buffer (end) == buffer, NULL);
if (include_hidden_chars)
return gtk_text_iter_get_text (start, end);
else
return gtk_text_iter_get_visible_text (start, end);
}
/**
* gtk_text_buffer_get_slice:
* @buffer: a #GtkTextBuffer
* @start: start of a range
* @end: end of a range
* @include_hidden_chars: whether to include invisible text
*
* Returns the text in the range [@start,@end). Excludes undisplayed
* text (text marked with tags that set the invisibility attribute) if
* @include_hidden_chars is FALSE. The returned string includes a
* 0xFFFC character whenever the buffer contains
* embedded images, so byte and character indexes into
* the returned string <emphasis>do</emphasis> correspond to byte
* and character indexes into the buffer. Contrast with
* gtk_text_buffer_get_text (). Note that 0xFFFC can occur in normal
* text as well, so it is not a reliable indicator that a pixbuf or
* widget is in the buffer.
*
* Return value: an allocated UTF-8 string
**/
gchar*
gtk_text_buffer_get_slice (GtkTextBuffer *buffer,
const GtkTextIter *start,
const GtkTextIter *end,
gboolean include_hidden_chars)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (start != NULL, NULL);
g_return_val_if_fail (end != NULL, NULL);
g_return_val_if_fail (gtk_text_iter_get_buffer (start) == buffer, NULL);
g_return_val_if_fail (gtk_text_iter_get_buffer (end) == buffer, NULL);
if (include_hidden_chars)
return gtk_text_iter_get_slice (start, end);
else
return gtk_text_iter_get_visible_slice (start, end);
}
/*
* Pixbufs
*/
static void
gtk_text_buffer_real_insert_pixbuf (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPixbuf *pixbuf)
{
_gtk_text_btree_insert_pixbuf (iter, pixbuf);
g_signal_emit (G_OBJECT (buffer), signals[CHANGED], 0);
}
/**
* gtk_text_buffer_insert_pixbuf:
* @buffer: a #GtkTextBuffer
* @iter: location to insert the pixbuf
* @pixbuf: a #GdkPixbuf
*
* Inserts an image into the text buffer at @iter. The image will be
* counted as one character in character counts, and when obtaining
* the buffer contents as a string, will be represented by the Unicode
* "object replacement character" 0xFFFC. Note that the "slice"
* variants for obtaining portions of the buffer as a string include
* this character for pixbufs, but the "text" variants do
* not. e.g. see gtk_text_buffer_get_slice() and
* gtk_text_buffer_get_text().
*
**/
void
gtk_text_buffer_insert_pixbuf (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPixbuf *pixbuf)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (GDK_IS_PIXBUF (pixbuf));
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
g_signal_emit (G_OBJECT (buffer), signals[INSERT_PIXBUF], 0,
iter, pixbuf);
}
/*
* Child anchor
*/
static void
gtk_text_buffer_real_insert_anchor (GtkTextBuffer *buffer,
GtkTextIter *iter,
GtkTextChildAnchor *anchor)
{
_gtk_text_btree_insert_child_anchor (iter, anchor);
g_signal_emit (G_OBJECT (buffer), signals[CHANGED], 0);
}
/**
* gtk_text_buffer_insert_child_anchor:
* @buffer: a #GtkTextBuffer
* @iter: location to insert the anchor
* @anchor: a #GtkTextChildAnchor
*
* Inserts a child widget anchor into the text buffer at @iter. The
* anchor will be counted as one character in character counts, and
* when obtaining the buffer contents as a string, will be represented
* by the Unicode "object replacement character" 0xFFFC. Note that the
* "slice" variants for obtaining portions of the buffer as a string
* include this character for child anchors, but the "text" variants do
* not. e.g. see gtk_text_buffer_get_slice() and
* gtk_text_buffer_get_text(). Consider
* gtk_text_buffer_create_child_anchor() as a more convenient
* alternative to this function. The buffer will add a reference to
* the anchor, so you can unref it after insertion.
*
**/
void
gtk_text_buffer_insert_child_anchor (GtkTextBuffer *buffer,
GtkTextIter *iter,
GtkTextChildAnchor *anchor)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
g_signal_emit (G_OBJECT (buffer), signals[INSERT_CHILD_ANCHOR], 0,
iter, anchor);
}
/**
* gtk_text_buffer_create_child_anchor:
* @buffer: a #GtkTextBuffer
* @iter: location in the buffer
*
* This is a convenience function which simply creates a child anchor
* with gtk_text_child_anchor_new() and inserts it into the buffer
* with gtk_text_buffer_insert_child_anchor(). The new anchor is
* owned by the buffer; no reference count is returned to
* the caller of gtk_text_buffer_create_child_anchor().
*
* Return value: the created child anchor
**/
GtkTextChildAnchor*
gtk_text_buffer_create_child_anchor (GtkTextBuffer *buffer,
GtkTextIter *iter)
{
GtkTextChildAnchor *anchor;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (iter != NULL, NULL);
g_return_val_if_fail (gtk_text_iter_get_buffer (iter) == buffer, NULL);
anchor = gtk_text_child_anchor_new ();
gtk_text_buffer_insert_child_anchor (buffer, iter, anchor);
g_object_unref (G_OBJECT (anchor));
return anchor;
}
/*
* Mark manipulation
*/
static void
gtk_text_buffer_mark_set (GtkTextBuffer *buffer,
const GtkTextIter *location,
GtkTextMark *mark)
{
/* IMO this should NOT work like insert_text and delete_range,
* where the real action happens in the default handler.
*
* The reason is that the default handler would be _required_,
* i.e. the whole widget would start breaking and segfaulting if the
* default handler didn't get run. So you can't really override the
* default handler or stop the emission; that is, this signal is
* purely for notification, and not to allow users to modify the
* default behavior.
*/
g_object_ref (G_OBJECT (mark));
g_signal_emit (G_OBJECT (buffer),
signals[MARK_SET],
0,
location,
mark);
g_object_unref (G_OBJECT (mark));
}
/**
* gtk_text_buffer_set_mark:
* @buffer: a #GtkTextBuffer
* @mark_name: name of the mark
* @iter: location for the mark.
* @left_gravity: if the mark is created by this function, gravity for the new
* mark.
* @should_exist: if %TRUE, warn if the mark does not exist, and return
* immediately.
*
* Move the mark to the given position, if not @should_exist, create the mark.
*
* Return value: mark
**/
static GtkTextMark*
gtk_text_buffer_set_mark (GtkTextBuffer *buffer,
GtkTextMark *existing_mark,
const gchar *mark_name,
const GtkTextIter *iter,
gboolean left_gravity,
gboolean should_exist)
{
GtkTextIter location;
GtkTextMark *mark;
g_return_val_if_fail (gtk_text_iter_get_buffer (iter) == buffer, NULL);
mark = _gtk_text_btree_set_mark (get_btree (buffer),
existing_mark,
mark_name,
left_gravity,
iter,
should_exist);
if (_gtk_text_btree_mark_is_insert (get_btree (buffer), mark) ||
_gtk_text_btree_mark_is_selection_bound (get_btree (buffer), mark))
{
update_selection_clipboards (buffer);
}
_gtk_text_btree_get_iter_at_mark (get_btree (buffer),
&location,
mark);
gtk_text_buffer_mark_set (buffer, &location, mark);
return mark;
}
/**
* gtk_text_buffer_create_mark:
* @buffer: a #GtkTextBuffer
* @mark_name: name for mark, or %NULL
* @where: location to place mark
* @left_gravity: whether the mark has left gravity
*
* Creates a mark at position @where. If @mark_name is %NULL, the mark
* is anonymous; otherwise, the mark can be retrieved by name using
* gtk_text_buffer_get_mark (). If a mark has left gravity, and text is
* inserted at the mark's current location, the mark will be moved to
* the left of the newly-inserted text. If the mark has right gravity
* (@left_gravity = %FALSE), the mark will end up on the right of
* newly-inserted text. The standard left-to-right cursor is a mark
* with right gravity (when you type, the cursor stays on the right
* side of the text you're typing).
*
* The caller of this function does <emphasis>not</emphasis> own a reference
* to the returned #GtkTextMark, so you can ignore the return value
* if you like. Marks are owned by the buffer and go away when the
* buffer does.
*
* Emits the "mark_set" signal as notification of the mark's initial
* placement.
*
* Return value: the new #GtkTextMark object
**/
GtkTextMark*
gtk_text_buffer_create_mark (GtkTextBuffer *buffer,
const gchar *mark_name,
const GtkTextIter *where,
gboolean left_gravity)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
return gtk_text_buffer_set_mark (buffer, NULL, mark_name, where,
left_gravity, FALSE);
}
/**
* gtk_text_buffer_move_mark:
* @buffer: a #GtkTextBuffer
* @mark: a #GtkTextMark
* @where: new location for @mark in @buffer
*
* Moves @mark to the new location @where. Emits the "mark_set" signal
* as notification of the move.
**/
void
gtk_text_buffer_move_mark (GtkTextBuffer *buffer,
GtkTextMark *mark,
const GtkTextIter *where)
{
g_return_if_fail (GTK_IS_TEXT_MARK (mark));
g_return_if_fail (!gtk_text_mark_get_deleted (mark));
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
gtk_text_buffer_set_mark (buffer, mark, NULL, where, FALSE, TRUE);
}
/**
* gtk_text_buffer_get_iter_at_mark:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
* @mark: a #GtkTextMark in @buffer
*
* Initializes @iter with the current position of @mark.
**/
void
gtk_text_buffer_get_iter_at_mark (GtkTextBuffer *buffer,
GtkTextIter *iter,
GtkTextMark *mark)
{
g_return_if_fail (GTK_IS_TEXT_MARK (mark));
g_return_if_fail (!gtk_text_mark_get_deleted (mark));
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_iter_at_mark (get_btree (buffer),
iter,
mark);
}
/**
* gtk_text_buffer_delete_mark:
* @buffer: a #GtkTextBuffer
* @mark: a #GtkTextMark in @buffer
*
* Deletes @mark, so that it's no longer located anywhere in the
* buffer. Removes the reference the buffer holds to the mark, so if
* you haven't called g_object_ref () on the mark, it will be freed. Even
* if the mark isn't freed, most operations on @mark become
* invalid. There is no way to undelete a
* mark. gtk_text_mark_get_deleted () will return TRUE after this
* function has been called on a mark; gtk_text_mark_get_deleted ()
* indicates that a mark no longer belongs to a buffer. The "mark_deleted"
* signal will be emitted as notification after the mark is deleted.
**/
void
gtk_text_buffer_delete_mark (GtkTextBuffer *buffer,
GtkTextMark *mark)
{
g_return_if_fail (GTK_IS_TEXT_MARK (mark));
g_return_if_fail (!gtk_text_mark_get_deleted (mark));
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_object_ref (G_OBJECT (mark));
_gtk_text_btree_remove_mark (get_btree (buffer), mark);
/* See rationale above for MARK_SET on why we emit this after
* removing the mark, rather than removing the mark in a default
* handler.
*/
g_signal_emit (G_OBJECT (buffer), signals[MARK_DELETED],
0,
mark);
g_object_unref (G_OBJECT (mark));
}
/**
* gtk_text_buffer_get_mark:
* @buffer: a #GtkTextBuffer
* @name: a mark name
*
* Returns the mark named @name in buffer @buffer, or NULL if no such
* mark exists in the buffer.
*
* Return value: a #GtkTextMark, or NULL
**/
GtkTextMark*
gtk_text_buffer_get_mark (GtkTextBuffer *buffer,
const gchar *name)
{
GtkTextMark *mark;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (name != NULL, NULL);
mark = _gtk_text_btree_get_mark_by_name (get_btree (buffer), name);
return mark;
}
/**
* gtk_text_buffer_move_mark_by_name:
* @buffer: a #GtkTextBuffer
* @name: name of a mark
* @where: new location for mark
*
* Moves the mark named @name (which must exist) to location @where.
* See gtk_text_buffer_move_mark () for details.
**/
void
gtk_text_buffer_move_mark_by_name (GtkTextBuffer *buffer,
const gchar *name,
const GtkTextIter *where)
{
GtkTextMark *mark;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (name != NULL);
mark = _gtk_text_btree_get_mark_by_name (get_btree (buffer), name);
if (mark == NULL)
{
g_warning ("%s: no mark named '%s'", G_STRLOC, name);
return;
}
gtk_text_buffer_move_mark (buffer, mark, where);
}
/**
* gtk_text_buffer_delete_mark_by_name:
* @buffer: a #GtkTextBuffer
* @name: name of a mark in @buffer
*
* Deletes the mark named @name; the mark must exist. See
* gtk_text_buffer_delete_mark () for details.
**/
void
gtk_text_buffer_delete_mark_by_name (GtkTextBuffer *buffer,
const gchar *name)
{
GtkTextMark *mark;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (name != NULL);
mark = _gtk_text_btree_get_mark_by_name (get_btree (buffer), name);
if (mark == NULL)
{
g_warning ("%s: no mark named '%s'", G_STRLOC, name);
return;
}
gtk_text_buffer_delete_mark (buffer, mark);
}
/**
* gtk_text_buffer_get_insert:
* @buffer: a #GtkTextBuffer
*
* Returns the mark that represents the cursor (insertion point).
* Equivalent to calling gtk_text_buffer_get_mark () to get the mark
* named "insert", but very slightly more efficient, and involves less
* typing.
*
* Return value: insertion point mark
**/
GtkTextMark*
gtk_text_buffer_get_insert (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
/* FIXME use struct member in btree */
return gtk_text_buffer_get_mark (buffer, "insert");
}
/**
* gtk_text_buffer_get_selection_bound:
* @buffer: a #GtkTextBuffer
*
* Returns the mark that represents the selection bound. Equivalent
* to calling gtk_text_buffer_get_mark () to get the mark named
* "selection_bound", but very slightly more efficient, and involves
* less typing.
*
* The currently-selected text in @buffer is the region between the
* "selection_bound" and "insert" marks. If "selection_bound" and
* "insert" are in the same place, then there is no current selection.
* gtk_text_buffer_get_selection_bounds() is another convenient function
* for handling the selection, if you just want to know whether there's a
* selection and what its bounds are.
*
* Return value: selection bound mark
**/
GtkTextMark*
gtk_text_buffer_get_selection_bound (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
/* FIXME use struct member in btree */
return gtk_text_buffer_get_mark (buffer, "selection_bound");
}
/**
* gtk_text_buffer_get_iter_at_child_anchor:
* @buffer: a #GtkTextBuffer
* @iter: an iterator to be initialized
* @anchor: a child anchor that appears in @buffer
*
* Obtains the location of @anchor within @buffer.
*
**/
void
gtk_text_buffer_get_iter_at_child_anchor (GtkTextBuffer *buffer,
GtkTextIter *iter,
GtkTextChildAnchor *anchor)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_CHILD_ANCHOR (anchor));
g_return_if_fail (!gtk_text_child_anchor_get_deleted (anchor));
_gtk_text_btree_get_iter_at_child_anchor (get_btree (buffer),
iter,
anchor);
}
/**
* gtk_text_buffer_place_cursor:
* @buffer: a #GtkTextBuffer
* @where: where to put the cursor
*
* This function moves the "insert" and "selection_bound" marks
* simultaneously. If you move them to the same place in two steps
* with gtk_text_buffer_move_mark(), you will temporarily select a
* region in between their old and new locations, which can be pretty
* inefficient since the temporarily-selected region will force stuff
* to be recalculated. This function moves them as a unit, which can
* be optimized.
**/
void
gtk_text_buffer_place_cursor (GtkTextBuffer *buffer,
const GtkTextIter *where)
{
GtkTextIter real;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
real = *where;
_gtk_text_btree_place_cursor (get_btree (buffer), &real);
gtk_text_buffer_mark_set (buffer, &real,
gtk_text_buffer_get_mark (buffer,
"insert"));
gtk_text_buffer_mark_set (buffer, &real,
gtk_text_buffer_get_mark (buffer,
"selection_bound"));
}
/*
* Tags
*/
/**
* gtk_text_buffer_create_tag:
* @buffer: a #GtkTextBuffer
* @tag_name: name of the new tag, or %NULL
* @first_property_name: name of first property to set, or %NULL
* @Varargs: %NULL-terminated list of property names and values
*
*
* Creates a tag and adds it to the tag table for @buffer.
* Equivalent to calling gtk_text_tag_new () and then adding the
* tag to the buffer's tag table. The returned tag is owned by
* the buffer's tag table, so the ref count will be equal to one.
*
* If @tag_name is %NULL, the tag is anonymous.
*
* If @tag_name is non-%NULL, a tag called @tag_name must not already
* exist in the tag table for this buffer.
*
* The @first_property_name argument and subsequent arguments are a list
* of properties to set on the tag, as with g_object_set().
*
* Return value: a new tag
**/
GtkTextTag*
gtk_text_buffer_create_tag (GtkTextBuffer *buffer,
const gchar *tag_name,
const gchar *first_property_name,
...)
{
GtkTextTag *tag;
va_list list;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
tag = gtk_text_tag_new (tag_name);
gtk_text_tag_table_add (get_table (buffer), tag);
if (first_property_name)
{
va_start (list, first_property_name);
g_object_set_valist (G_OBJECT (tag), first_property_name, list);
va_end (list);
}
g_object_unref (tag);
return tag;
}
static void
gtk_text_buffer_real_apply_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start,
const GtkTextIter *end)
{
if (tag->table != buffer->tag_table)
{
g_warning ("Can only apply tags that are in the tag table for the buffer");
return;
}
_gtk_text_btree_tag (start, end, tag, TRUE);
}
static void
gtk_text_buffer_real_remove_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start,
const GtkTextIter *end)
{
if (tag->table != buffer->tag_table)
{
g_warning ("Can only remove tags that are in the tag table for the buffer");
return;
}
_gtk_text_btree_tag (start, end, tag, FALSE);
}
static void
gtk_text_buffer_real_changed (GtkTextBuffer *buffer)
{
gtk_text_buffer_set_modified (buffer, TRUE);
}
static void
gtk_text_buffer_emit_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
gboolean apply,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextIter start_tmp = *start;
GtkTextIter end_tmp = *end;
g_return_if_fail (tag != NULL);
gtk_text_iter_order (&start_tmp, &end_tmp);
if (apply)
g_signal_emit (G_OBJECT (buffer), signals[APPLY_TAG],
0,
tag, &start_tmp, &end_tmp);
else
g_signal_emit (G_OBJECT (buffer), signals[REMOVE_TAG],
0,
tag, &start_tmp, &end_tmp);
}
/**
* gtk_text_buffer_apply_tag:
* @buffer: a #GtkTextBuffer
* @tag: a #GtkTextTag
* @start: one bound of range to be tagged
* @end: other bound of range to be tagged
*
* Emits the "apply_tag" signal on @buffer. The default
* handler for the signal applies @tag to the given range.
* @start and @end do not have to be in order.
*
**/
void
gtk_text_buffer_apply_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start,
const GtkTextIter *end)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (GTK_IS_TEXT_TAG (tag));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) == buffer);
g_return_if_fail (gtk_text_iter_get_buffer (end) == buffer);
g_return_if_fail (tag->table == buffer->tag_table);
gtk_text_buffer_emit_tag (buffer, tag, TRUE, start, end);
}
/**
* gtk_text_buffer_remove_tag:
* @buffer: a #GtkTextBuffer
* @tag: a #GtkTextTag
* @start: one bound of range to be untagged
* @end: other bound of range to be untagged
*
* Emits the "remove_tag" signal. The default handler for the signal
* removes all occurrences of @tag from the given range. @start and
* @end don't have to be in order.
*
**/
void
gtk_text_buffer_remove_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start,
const GtkTextIter *end)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (GTK_IS_TEXT_TAG (tag));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) == buffer);
g_return_if_fail (gtk_text_iter_get_buffer (end) == buffer);
g_return_if_fail (tag->table == buffer->tag_table);
gtk_text_buffer_emit_tag (buffer, tag, FALSE, start, end);
}
/**
* gtk_text_buffer_apply_tag_by_name:
* @buffer: a #GtkTextBuffer
* @name: name of a named #GtkTextTag
* @start: one bound of range to be tagged
* @end: other bound of range to be tagged
*
* Calls gtk_text_tag_table_lookup() on the buffer's tag table to
* get a #GtkTextTag, then calls gtk_text_buffer_apply_tag().
*
**/
void
gtk_text_buffer_apply_tag_by_name (GtkTextBuffer *buffer,
const gchar *name,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextTag *tag;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (name != NULL);
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) == buffer);
g_return_if_fail (gtk_text_iter_get_buffer (end) == buffer);
tag = gtk_text_tag_table_lookup (get_table (buffer),
name);
if (tag == NULL)
{
g_warning ("Unknown tag `%s'", name);
return;
}
gtk_text_buffer_emit_tag (buffer, tag, TRUE, start, end);
}
/**
* gtk_text_buffer_remove_tag_by_name:
* @buffer: a #GtkTextBuffer
* @name: name of a #GtkTextTag
* @start: one bound of range to be untagged
* @end: other bound of range to be untagged
*
* Calls gtk_text_tag_table_lookup() on the buffer's tag table to
* get a #GtkTextTag, then calls gtk_text_buffer_remove_tag().
*
*
**/
void
gtk_text_buffer_remove_tag_by_name (GtkTextBuffer *buffer,
const gchar *name,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextTag *tag;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (name != NULL);
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) == buffer);
g_return_if_fail (gtk_text_iter_get_buffer (end) == buffer);
tag = gtk_text_tag_table_lookup (get_table (buffer),
name);
if (tag == NULL)
{
g_warning ("Unknown tag `%s'", name);
return;
}
gtk_text_buffer_emit_tag (buffer, tag, FALSE, start, end);
}
static gint
pointer_cmp (gconstpointer a,
gconstpointer b)
{
if (a < b)
return -1;
else if (a > b)
return 1;
else
return 0;
}
/**
* gtk_text_buffer_remove_all_tags:
* @buffer: a #GtkTextBuffer
* @start: one bound of range to be untagged
* @end: other bound of range to be untagged
*
* Removes all tags in the range between @start and @end. Be careful
* with this function; it could remove tags added in code unrelated to
* the code you're currently writing. That is, using this function is
* probably a bad idea if you have two or more unrelated code sections
* that add tags.
**/
void
gtk_text_buffer_remove_all_tags (GtkTextBuffer *buffer,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextIter first, second, tmp;
GSList *tags;
GSList *tmp_list;
GSList *prev;
GtkTextTag *tag;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (gtk_text_iter_get_buffer (start) == buffer);
g_return_if_fail (gtk_text_iter_get_buffer (end) == buffer);
first = *start;
second = *end;
gtk_text_iter_order (&first, &second);
/* Get all tags turned on at the start */
tags = gtk_text_iter_get_tags (&first);
/* Find any that are toggled on within the range */
tmp = first;
while (gtk_text_iter_forward_to_tag_toggle (&tmp, NULL))
{
GSList *toggled;
GSList *tmp_list2;
if (gtk_text_iter_compare (&tmp, &second) >= 0)
break; /* past the end of the range */
toggled = gtk_text_iter_get_toggled_tags (&tmp, TRUE);
/* We could end up with a really big-ass list here.
* Fix it someday.
*/
tmp_list2 = toggled;
while (tmp_list2 != NULL)
{
tags = g_slist_prepend (tags, tmp_list2->data);
tmp_list2 = g_slist_next (tmp_list2);
}
g_slist_free (toggled);
}
/* Sort the list */
tags = g_slist_sort (tags, pointer_cmp);
/* Strip duplicates */
tag = NULL;
prev = NULL;
tmp_list = tags;
while (tmp_list != NULL)
{
if (tag == tmp_list->data)
{
/* duplicate */
if (prev)
prev->next = tmp_list->next;
tmp_list->next = NULL;
g_slist_free (tmp_list);
tmp_list = prev->next;
/* prev is unchanged */
}
else
{
/* not a duplicate */
tag = GTK_TEXT_TAG (tmp_list->data);
prev = tmp_list;
tmp_list = tmp_list->next;
}
}
g_slist_foreach (tags, (GFunc) g_object_ref, NULL);
tmp_list = tags;
while (tmp_list != NULL)
{
tag = GTK_TEXT_TAG (tmp_list->data);
gtk_text_buffer_remove_tag (buffer, tag, &first, &second);
tmp_list = tmp_list->next;
}
g_slist_foreach (tags, (GFunc) g_object_unref, NULL);
g_slist_free (tags);
}
/*
* Obtain various iterators
*/
/**
* gtk_text_buffer_get_iter_at_line_offset:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
* @line_number: line number counting from 0
* @char_offset: char offset from start of line
*
* Obtains an iterator pointing to @char_offset within the given
* line. The @char_offset must exist, offsets off the end of the line
* are not allowed. Note <emphasis>characters</emphasis>, not bytes;
* UTF-8 may encode one character as multiple bytes.
*
**/
void
gtk_text_buffer_get_iter_at_line_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint line_number,
gint char_offset)
{
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_iter_at_line_char (get_btree (buffer),
iter, line_number, char_offset);
}
/**
* gtk_text_buffer_get_iter_at_line_index:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
* @line_number: line number counting from 0
* @byte_index: byte index from start of line
*
* Obtains an iterator pointing to @byte_index within the given line.
* @byte_index must be the start of a UTF-8 character, and must not be
* beyond the end of the line. Note <emphasis>bytes</emphasis>, not
* characters; UTF-8 may encode one character as multiple bytes.
*
**/
void
gtk_text_buffer_get_iter_at_line_index (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint line_number,
gint byte_index)
{
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_iter_at_line_byte (get_btree (buffer),
iter, line_number, byte_index);
}
/**
* gtk_text_buffer_get_iter_at_line:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
* @line_number: line number counting from 0
*
* Initializes @iter to the start of the given line.
**/
void
gtk_text_buffer_get_iter_at_line (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint line_number)
{
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
gtk_text_buffer_get_iter_at_line_offset (buffer, iter, line_number, 0);
}
/**
* gtk_text_buffer_get_iter_at_offset:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
* @char_offset: char offset from start of buffer, counting from 0
*
* Initializes @iter to a position @char_offset chars from the start
* of the entire buffer.
*
**/
void
gtk_text_buffer_get_iter_at_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint char_offset)
{
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_iter_at_char (get_btree (buffer), iter, char_offset);
}
/**
* gtk_text_buffer_get_start_iter:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
*
* Initialized @iter with the first position in the text buffer. This
* is the same as using gtk_text_buffer_get_iter_at_offset() to get
* the iter at character offset 0.
*
**/
void
gtk_text_buffer_get_start_iter (GtkTextBuffer *buffer,
GtkTextIter *iter)
{
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_iter_at_char (get_btree (buffer), iter, 0);
}
/**
* gtk_text_buffer_get_end_iter:
* @buffer: a #GtkTextBuffer
* @iter: iterator to initialize
*
* Initializes @iter with the "end iterator," one past the last valid
* character in the text buffer. If dereferenced with
* gtk_text_iter_get_char(), the end iterator has a character value of
* 0. The entire buffer lies in the range from the first position in
* the buffer (call gtk_text_buffer_get_start_iter() to get
* character position 0) to the end iterator.
*
**/
void
gtk_text_buffer_get_end_iter (GtkTextBuffer *buffer,
GtkTextIter *iter)
{
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_end_iter (get_btree (buffer), iter);
}
/**
* gtk_text_buffer_get_bounds:
* @buffer: a #GtkTextBuffer
* @start: iterator to initialize with first position in the buffer
* @end: iterator to initialize with the end iterator
*
* Retrieves the first and last iterators in the buffer, i.e. the
* entire buffer lies within the range [@start,@end).
*
**/
void
gtk_text_buffer_get_bounds (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
_gtk_text_btree_get_iter_at_char (get_btree (buffer), start, 0);
_gtk_text_btree_get_end_iter (get_btree (buffer), end);
}
/*
* Modified flag
*/
/**
* gtk_text_buffer_get_modified:
* @buffer: a #GtkTextBuffer
*
* Indicates whether the buffer has been modified since the last call
* to gtk_text_buffer_set_modified() set the modification flag to
* %FALSE. Used for example to enable a "save" function in a text
* editor.
*
* Return value: %TRUE if the buffer has been modified
**/
gboolean
gtk_text_buffer_get_modified (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return buffer->modified;
}
/**
* gtk_text_buffer_set_modified:
* @buffer: a #GtkTextBuffer
* @setting: modification flag setting
*
* Used to keep track of whether the buffer has been modified since the
* last time it was saved. Whenever the buffer is saved to disk, call
* gtk_text_buffer_set_modified (@buffer, FALSE). When the buffer is modified,
* it will automatically toggled on the modified bit again. When the modified
* bit flips, the buffer emits a "modified_changed" signal.
*
**/
void
gtk_text_buffer_set_modified (GtkTextBuffer *buffer,
gboolean setting)
{
gboolean fixed_setting;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
fixed_setting = setting != FALSE;
if (buffer->modified == fixed_setting)
return;
else
{
buffer->modified = fixed_setting;
g_signal_emit (G_OBJECT (buffer), signals[MODIFIED_CHANGED], 0);
}
}
/*
* Assorted other stuff
*/
/**
* gtk_text_buffer_get_line_count:
* @buffer: a #GtkTextBuffer
*
* Obtains the number of lines in the buffer. This value is cached, so
* the function is very fast.
*
* Return value: number of lines in the buffer
**/
gint
gtk_text_buffer_get_line_count (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), 0);
return _gtk_text_btree_line_count (get_btree (buffer));
}
/**
* gtk_text_buffer_get_char_count:
* @buffer: a #GtkTextBuffer
*
* Gets the number of characters in the buffer; note that characters
* and bytes are not the same, you can't e.g. expect the contents of
* the buffer in string form to be this many bytes long. The character
* count is cached, so this function is very fast.
*
* Return value: number of characters in the buffer
**/
gint
gtk_text_buffer_get_char_count (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), 0);
return _gtk_text_btree_char_count (get_btree (buffer));
}
/* Called when we lose the primary selection.
*/
static void
clipboard_clear_selection_cb (GtkClipboard *clipboard,
gpointer data)
{
/* Move selection_bound to the insertion point */
GtkTextIter insert;
GtkTextIter selection_bound;
GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data);
gtk_text_buffer_get_iter_at_mark (buffer, &insert,
gtk_text_buffer_get_mark (buffer, "insert"));
gtk_text_buffer_get_iter_at_mark (buffer, &selection_bound,
gtk_text_buffer_get_mark (buffer, "selection_bound"));
if (!gtk_text_iter_equal (&insert, &selection_bound))
gtk_text_buffer_move_mark (buffer,
gtk_text_buffer_get_mark (buffer, "selection_bound"),
&insert);
}
/* Called when we have the primary selection and someone else wants our
* data in order to paste it.
*/
static void
clipboard_get_selection_cb (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
gpointer data)
{
GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data);
GtkTextIter start, end;
if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
if (selection_data->target ==
gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
{
/* Provide the address of the buffer; this will only be
* used within-process
*/
gtk_selection_data_set (selection_data,
gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
8, /* bytes */
(void*)&buffer,
sizeof (buffer));
}
else
{
gchar *str;
str = gtk_text_iter_get_visible_text (&start, &end);
gtk_selection_data_set_text (selection_data, str, -1);
g_free (str);
}
}
}
typedef struct
{
GtkClipboard *clipboard;
GtkTextBuffer *buffer;
} ContentsBuffer;
static void
remove_all_clipboard_contents_buffers (GtkTextBuffer *buffer)
{
GSList *tmp_list = buffer->clipboard_contents_buffers;
while (tmp_list)
{
ContentsBuffer *contents_buffer = tmp_list->data;
g_object_unref (contents_buffer->buffer);
g_free (contents_buffer);
tmp_list = tmp_list->next;
}
g_slist_free (buffer->clipboard_contents_buffers);
buffer->clipboard_contents_buffers = NULL;
}
static void
remove_clipboard_contents_buffer (GtkTextBuffer *buffer,
GtkClipboard *clipboard)
{
GSList *tmp_list = buffer->clipboard_contents_buffers;
while (tmp_list)
{
ContentsBuffer *contents_buffer = tmp_list->data;
if (contents_buffer->clipboard == clipboard)
{
buffer->clipboard_contents_buffers = g_slist_remove (buffer->clipboard_contents_buffers, contents_buffer);
g_object_unref (contents_buffer->buffer);
g_free (contents_buffer);
return;
}
tmp_list = tmp_list->next;
}
}
static GtkTextBuffer *
get_clipboard_contents_buffer (GtkTextBuffer *buffer,
GtkClipboard *clipboard,
gboolean create)
{
ContentsBuffer *contents_buffer;
GSList *tmp_list;
tmp_list = buffer->clipboard_contents_buffers;
while (tmp_list)
{
contents_buffer = tmp_list->data;
if (contents_buffer->clipboard == clipboard)
return contents_buffer->buffer;
}
if (create)
{
contents_buffer = g_new (ContentsBuffer, 1);
contents_buffer->clipboard = clipboard;
contents_buffer->buffer = gtk_text_buffer_new (gtk_text_buffer_get_tag_table (buffer));
g_object_set_data (G_OBJECT (contents_buffer->buffer), "gtk-text-buffer-clipboard",
GUINT_TO_POINTER (1));
buffer->clipboard_contents_buffers = g_slist_prepend (buffer->clipboard_contents_buffers, contents_buffer);
return contents_buffer->buffer;
}
else
return NULL;
}
/* Provide cut/copied data */
static void
clipboard_get_contents_cb (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
gpointer data)
{
GtkTextBuffer *buffer;
GtkTextBuffer *contents;
buffer = GTK_TEXT_BUFFER (data);
contents = get_clipboard_contents_buffer (buffer, clipboard, FALSE);
g_assert (contents); /* This should never be called unless we own the clipboard */
if (selection_data->target ==
gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
{
/* Provide the address of the clipboard buffer; this will only
* be used within-process. OK to supply a NULL value for contents.
*/
gtk_selection_data_set (selection_data,
gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
8, /* bytes */
(void*)&contents,
sizeof (contents));
}
else
{
gchar *str;
GtkTextIter start, end;
gtk_text_buffer_get_bounds (contents, &start, &end);
str = gtk_text_iter_get_visible_text (&start, &end);
gtk_selection_data_set_text (selection_data, str, -1);
g_free (str);
}
}
static void
clipboard_clear_contents_cb (GtkClipboard *clipboard,
gpointer data)
{
GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data);
remove_clipboard_contents_buffer (buffer, clipboard);
}
static void
get_paste_point (GtkTextBuffer *buffer,
GtkTextIter *iter,
gboolean clear_afterward)
{
GtkTextIter insert_point;
GtkTextMark *paste_point_override;
paste_point_override = gtk_text_buffer_get_mark (buffer,
"gtk_paste_point_override");
if (paste_point_override != NULL)
{
gtk_text_buffer_get_iter_at_mark (buffer, &insert_point,
paste_point_override);
if (clear_afterward)
gtk_text_buffer_delete_mark (buffer,
gtk_text_buffer_get_mark (buffer,
"gtk_paste_point_override"));
}
else
{
gtk_text_buffer_get_iter_at_mark (buffer, &insert_point,
gtk_text_buffer_get_mark (buffer,
"insert"));
}
*iter = insert_point;
}
static void
pre_paste_prep (ClipboardRequest *request_data,
GtkTextIter *insert_point)
{
GtkTextBuffer *buffer = request_data->buffer;
get_paste_point (buffer, insert_point, TRUE);
/* If we're going to replace the selection, we insert before it to
* avoid messing it up, then we delete the selection after inserting.
*/
if (request_data->replace_selection)
{
GtkTextIter start, end;
if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
*insert_point = start;
}
}
static void
post_paste_cleanup (ClipboardRequest *request_data)
{
if (request_data->replace_selection)
{
GtkTextIter start, end;
if (gtk_text_buffer_get_selection_bounds (request_data->buffer,
&start, &end))
{
if (request_data->interactive)
gtk_text_buffer_delete_interactive (request_data->buffer,
&start,
&end,
request_data->default_editable);
else
gtk_text_buffer_delete (request_data->buffer, &start, &end);
}
}
}
/* Called when we request a paste and receive the text data
*/
static void
clipboard_text_received (GtkClipboard *clipboard,
const gchar *str,
gpointer data)
{
ClipboardRequest *request_data = data;
GtkTextBuffer *buffer = request_data->buffer;
if (str)
{
GtkTextIter insert_point;
pre_paste_prep (request_data, &insert_point);
if (request_data->interactive)
gtk_text_buffer_insert_interactive (buffer, &insert_point,
str, -1, request_data->default_editable);
else
gtk_text_buffer_insert (buffer, &insert_point,
str, -1);
post_paste_cleanup (request_data);
}
g_object_unref (G_OBJECT (buffer));
g_free (request_data);
}
static GtkTextBuffer*
selection_data_get_buffer (GtkSelectionData *selection_data,
ClipboardRequest *request_data)
{
GdkWindow *owner;
GtkTextBuffer *src_buffer = NULL;
/* If we can get the owner, the selection is in-process */
owner = gdk_selection_owner_get_for_display (selection_data->display,
selection_data->selection);
if (owner == NULL)
return NULL;
if (gdk_window_get_window_type (owner) == GDK_WINDOW_FOREIGN)
return NULL;
if (selection_data->type != gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE))
return NULL;
if (selection_data->length != sizeof (src_buffer))
return NULL;
memcpy (&src_buffer, selection_data->data, sizeof (src_buffer));
if (src_buffer == NULL)
return NULL;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (src_buffer), NULL);
if (gtk_text_buffer_get_tag_table (src_buffer) !=
gtk_text_buffer_get_tag_table (request_data->buffer))
return NULL;
return src_buffer;
}
#if 0
/* These are pretty handy functions; maybe something like them
* should be in the public API. Also, there are other places in this
* file where they could be used.
*/
static gpointer
save_iter (const GtkTextIter *iter,
gboolean left_gravity)
{
return gtk_text_buffer_create_mark (gtk_text_iter_get_buffer (iter),
NULL,
iter,
TRUE);
}
static void
restore_iter (const GtkTextIter *iter,
gpointer save_id)
{
gtk_text_buffer_get_iter_at_mark (gtk_text_mark_get_buffer (save_id),
(GtkTextIter*) iter,
save_id);
gtk_text_buffer_delete_mark (gtk_text_mark_get_buffer (save_id),
save_id);
}
#endif
static void
paste_from_buffer (ClipboardRequest *request_data,
GtkTextBuffer *src_buffer,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextIter insert_point;
/* We're about to emit a bunch of signals, so be safe */
g_object_ref (G_OBJECT (src_buffer));
pre_paste_prep (request_data, &insert_point);
if (!gtk_text_iter_equal (start, end))
{
if (!request_data->interactive ||
(gtk_text_iter_can_insert (&insert_point,
request_data->default_editable)))
gtk_text_buffer_real_insert_range (request_data->buffer,
&insert_point,
start,
end,
request_data->interactive);
}
post_paste_cleanup (request_data);
g_object_unref (G_OBJECT (src_buffer));
g_free (request_data);
}
static void
clipboard_clipboard_buffer_received (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
gpointer data)
{
ClipboardRequest *request_data = data;
GtkTextBuffer *src_buffer;
src_buffer = selection_data_get_buffer (selection_data, request_data);
if (src_buffer)
{
GtkTextIter start, end;
if (g_object_get_data (G_OBJECT (src_buffer), "gtk-text-buffer-clipboard"))
{
gtk_text_buffer_get_bounds (src_buffer, &start, &end);
paste_from_buffer (request_data, src_buffer,
&start, &end);
}
else
{
if (gtk_text_buffer_get_selection_bounds (src_buffer, &start, &end))
paste_from_buffer (request_data, src_buffer,
&start, &end);
}
}
else
{
/* Request the text selection instead */
gtk_clipboard_request_text (clipboard,
clipboard_text_received,
data);
}
}
static const GtkTargetEntry targets[] = {
{ "STRING", 0, TARGET_STRING },
{ "TEXT", 0, TARGET_TEXT },
{ "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
{ "UTF8_STRING", 0, TARGET_UTF8_STRING },
{ "GTK_TEXT_BUFFER_CONTENTS", 0, TARGET_TEXT_BUFFER_CONTENTS }
};
typedef struct
{
GtkClipboard *clipboard;
guint ref_count;
} SelectionClipboard;
static void
update_selection_clipboards (GtkTextBuffer *buffer)
{
GSList *tmp_list = buffer->selection_clipboards;
while (tmp_list)
{
GtkTextIter start;
GtkTextIter end;
SelectionClipboard *selection_clipboard = tmp_list->data;
GtkClipboard *clipboard = selection_clipboard->clipboard;
/* Determine whether we have a selection and adjust X selection
* accordingly.
*/
if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (buffer))
gtk_clipboard_clear (clipboard);
}
else
{
/* Even if we already have the selection, we need to update our
* timestamp.
*/
if (!gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets),
clipboard_get_selection_cb,
clipboard_clear_selection_cb,
G_OBJECT (buffer)))
clipboard_clear_selection_cb (clipboard, buffer);
}
tmp_list = tmp_list->next;
}
}
static SelectionClipboard *
find_selection_clipboard (GtkTextBuffer *buffer,
GtkClipboard *clipboard)
{
GSList *tmp_list = buffer->selection_clipboards;
while (tmp_list)
{
SelectionClipboard *selection_clipboard = tmp_list->data;
if (selection_clipboard->clipboard == clipboard)
return selection_clipboard;
tmp_list = tmp_list->next;
}
return NULL;
}
/**
* gtk_text_buffer_add_selection_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: a #GtkClipboard
*
* Adds @clipboard to the list of clipboards in which the selection contents
* of @buffer are available. In most cases, @clipboard will be the #GtkClipboard
* of type %GDK_SELECTION_PRIMARY for a view of @buffer.
**/
void
gtk_text_buffer_add_selection_clipboard (GtkTextBuffer *buffer,
GtkClipboard *clipboard)
{
SelectionClipboard *selection_clipboard;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (clipboard != NULL);
selection_clipboard = find_selection_clipboard (buffer, clipboard);
if (selection_clipboard)
{
selection_clipboard->ref_count++;
}
else
{
selection_clipboard = g_new (SelectionClipboard, 1);
selection_clipboard->clipboard = clipboard;
selection_clipboard->ref_count = 1;
buffer->selection_clipboards = g_slist_prepend (buffer->selection_clipboards, selection_clipboard);
}
}
/**
* gtk_text_buffer_remove_selection_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: a #GtkClipboard added to @buffer by gtk_text_buffer_add_selection_clipboard().
*
* Removes a #GtkClipboard added with gtk_text_buffer_add_selection_clipboard()
**/
void
gtk_text_buffer_remove_selection_clipboard (GtkTextBuffer *buffer,
GtkClipboard *clipboard)
{
SelectionClipboard *selection_clipboard;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (clipboard != NULL);
selection_clipboard = find_selection_clipboard (buffer, clipboard);
g_return_if_fail (selection_clipboard != NULL);
selection_clipboard->ref_count--;
if (selection_clipboard->ref_count == 0)
{
if (gtk_clipboard_get_owner (selection_clipboard->clipboard) == G_OBJECT (buffer))
gtk_clipboard_clear (selection_clipboard->clipboard);
buffer->selection_clipboards = g_slist_remove (buffer->selection_clipboards,
selection_clipboard);
g_free (selection_clipboard);
}
}
static void
remove_all_selection_clipboards (GtkTextBuffer *buffer)
{
GSList *tmp_list = buffer->selection_clipboards;
while (tmp_list)
{
SelectionClipboard *selection_clipboard = tmp_list->data;
if (gtk_clipboard_get_owner (selection_clipboard->clipboard) == G_OBJECT (buffer))
gtk_clipboard_clear (selection_clipboard->clipboard);
g_free (selection_clipboard);
tmp_list = tmp_list->next;
}
g_slist_free (buffer->selection_clipboards);
buffer->selection_clipboards = NULL;
}
/**
* gtk_text_buffer_paste_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: the #GtkClipboard to paste from
* @override_location: location to insert pasted text, or %NULL for at the cursor
* @default_editable: whether the buffer is editable by default
*
* Pastes the contents of a clipboard at the insertion point, or at @override_location.
* (Note: pasting is asynchronous, that is, we'll ask for the paste data and
* return, and at some point later after the main loop runs, the paste
* data will be inserted.)
*
**/
void
gtk_text_buffer_paste_clipboard (GtkTextBuffer *buffer,
GtkClipboard *clipboard,
GtkTextIter *override_location,
gboolean default_editable)
{
ClipboardRequest *data = g_new (ClipboardRequest, 1);
GtkTextIter paste_point;
GtkTextIter start, end;
if (override_location != NULL)
gtk_text_buffer_create_mark (buffer,
"gtk_paste_point_override",
override_location, FALSE);
data->buffer = buffer;
g_object_ref (G_OBJECT (buffer));
data->interactive = TRUE;
data->default_editable = default_editable;
/* When pasting with the cursor inside the selection area, you
* replace the selection with the new text, otherwise, you
* simply insert the new text at the point where the click
* occured, unselecting any selected text. The replace_selection
* flag toggles this behavior.
*/
data->replace_selection = FALSE;
get_paste_point (buffer, &paste_point, FALSE);
if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end) &&
(gtk_text_iter_in_range (&paste_point, &start, &end) ||
gtk_text_iter_equal (&paste_point, &end)))
data->replace_selection = TRUE;
gtk_clipboard_request_contents (clipboard,
gdk_atom_intern ("GTK_TEXT_BUFFER_CONTENTS", FALSE),
clipboard_clipboard_buffer_received, data);
}
/**
* gtk_text_buffer_delete_selection:
* @buffer: a #GtkTextBuffer
* @interactive: whether the deletion is caused by user interaction
* @default_editable: whether the buffer is editable by default
*
* Deletes the range between the "insert" and "selection_bound" marks,
* that is, the currently-selected text. If @interactive is %TRUE,
* the editability of the selection will be considered (users can't delete
* uneditable text).
*
* Return value: whether there was a non-empty selection to delete
**/
gboolean
gtk_text_buffer_delete_selection (GtkTextBuffer *buffer,
gboolean interactive,
gboolean default_editable)
{
GtkTextIter start;
GtkTextIter end;
if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
return FALSE; /* No selection */
}
else
{
if (interactive)
{
gtk_text_buffer_begin_user_action (buffer);
gtk_text_buffer_delete_interactive (buffer, &start, &end, default_editable);
gtk_text_buffer_end_user_action (buffer);
}
else
gtk_text_buffer_delete (buffer, &start, &end);
return TRUE; /* We deleted stuff */
}
}
static void
cut_or_copy (GtkTextBuffer *buffer,
GtkClipboard *clipboard,
gboolean delete_region_after,
gboolean interactive,
gboolean default_editable)
{
/* We prefer to cut the selected region between selection_bound and
* insertion point. If that region is empty, then we cut the region
* between the "anchor" and the insertion point (this is for
* C-space and M-w and other Emacs-style copy/yank keys). Note that
* insert and selection_bound are guaranteed to exist, but the
* anchor only exists sometimes.
*/
GtkTextIter start;
GtkTextIter end;
if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
/* Let's try the anchor thing */
GtkTextMark * anchor = gtk_text_buffer_get_mark (buffer, "anchor");
if (anchor == NULL)
return;
else
{
gtk_text_buffer_get_iter_at_mark (buffer, &end, anchor);
gtk_text_iter_order (&start, &end);
}
}
if (!gtk_text_iter_equal (&start, &end))
{
GtkTextIter ins;
GtkTextBuffer *contents;
remove_clipboard_contents_buffer (buffer, clipboard);
contents = get_clipboard_contents_buffer (buffer, clipboard, TRUE);
gtk_text_buffer_get_iter_at_offset (contents, &ins, 0);
gtk_text_buffer_insert_range (contents, &ins, &start, &end);
if (!gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets),
clipboard_get_contents_cb,
clipboard_clear_contents_cb,
G_OBJECT (buffer)))
clipboard_clear_contents_cb (clipboard, buffer);
if (delete_region_after)
{
if (interactive)
gtk_text_buffer_delete_interactive (buffer, &start, &end,
default_editable);
else
gtk_text_buffer_delete (buffer, &start, &end);
}
}
}
/**
* gtk_text_buffer_cut_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: the #GtkClipboard object to cut to.
* @default_editable: default editability of the buffer
*
* Copies the currently-selected text to a clipboard, then deletes
* said text if it's editable.
*
**/
void
gtk_text_buffer_cut_clipboard (GtkTextBuffer *buffer,
GtkClipboard *clipboard,
gboolean default_editable)
{
gtk_text_buffer_begin_user_action (buffer);
cut_or_copy (buffer, clipboard, TRUE, TRUE, default_editable);
gtk_text_buffer_end_user_action (buffer);
}
/**
* gtk_text_buffer_copy_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: the #GtkClipboard object to copy to.
*
* Copies the currently-selected text to a clipboard.
*
**/
void
gtk_text_buffer_copy_clipboard (GtkTextBuffer *buffer,
GtkClipboard *clipboard)
{
gtk_text_buffer_begin_user_action (buffer);
cut_or_copy (buffer, clipboard, FALSE, TRUE, TRUE);
gtk_text_buffer_end_user_action (buffer);
}
/**
* gtk_text_buffer_get_selection_bounds:
* @buffer: a #GtkTextBuffer a #GtkTextBuffer
* @start: iterator to initialize with selection start
* @end: iterator to initialize with selection end
*
* Returns %TRUE if some text is selected; places the bounds
* of the selection in @start and @end (if the selection has length 0,
* then @start and @end are filled in with the same value).
* @start and @end will be in ascending order. If @start and @end are
* NULL, then they are not filled in, but the return value still indicates
* whether text is selected.
*
* Return value: whether the selection has nonzero length
**/
gboolean
gtk_text_buffer_get_selection_bounds (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return _gtk_text_btree_get_selection_bounds (get_btree (buffer), start, end);
}
/**
* gtk_text_buffer_begin_user_action:
* @buffer: a #GtkTextBuffer
*
* Called to indicate that the buffer operations between here and a
* call to gtk_text_buffer_end_user_action() are part of a single
* user-visible operation. The operations between
* gtk_text_buffer_begin_user_action() and
* gtk_text_buffer_end_user_action() can then be grouped when creating
* an undo stack. #GtkTextBuffer maintains a count of calls to
* gtk_text_buffer_begin_user_action() that have not been closed with
* a call to gtk_text_buffer_end_user_action(), and emits the "begin_user_action"
* and "end_user_action" signals only for the outermost pair of calls.
* This allows you to build user actions from other user actions.
*
* The "interactive" buffer mutation functions, such as
* gtk_text_buffer_insert_interactive(), automatically call begin/end
* user action around the buffer operations they perform, so there's
* no need to add extra calls if you user action consists solely of a
* single call to one of those functions.
**/
void
gtk_text_buffer_begin_user_action (GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
buffer->user_action_count += 1;
if (buffer->user_action_count == 1)
{
/* Outermost nested user action begin emits the signal */
g_signal_emit (G_OBJECT (buffer), signals[BEGIN_USER_ACTION], 0);
}
}
/**
* gtk_text_buffer_end_user_action:
* @buffer: a #GtkTextBuffer
*
* Should be paired with a call to gtk_text_buffer_begin_user_action().
* See that function for a full explanation.
**/
void
gtk_text_buffer_end_user_action (GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (buffer->user_action_count > 0);
buffer->user_action_count -= 1;
if (buffer->user_action_count == 0)
{
/* Ended the outermost-nested user action end, so emit the signal */
g_signal_emit (G_OBJECT (buffer), signals[END_USER_ACTION], 0);
}
}
/*
* Logical attribute cache
*/
#define ATTR_CACHE_SIZE 2
typedef struct _CacheEntry CacheEntry;
struct _CacheEntry
{
gint line;
gint char_len;
PangoLogAttr *attrs;
};
struct _GtkTextLogAttrCache
{
gint chars_changed_stamp;
CacheEntry entries[ATTR_CACHE_SIZE];
};
static void
free_log_attr_cache (GtkTextLogAttrCache *cache)
{
gint i = 0;
while (i < ATTR_CACHE_SIZE)
{
g_free (cache->entries[i].attrs);
++i;
}
g_free (cache);
}
static void
clear_log_attr_cache (GtkTextLogAttrCache *cache)
{
gint i = 0;
while (i < ATTR_CACHE_SIZE)
{
g_free (cache->entries[i].attrs);
cache->entries[i].attrs = NULL;
++i;
}
}
static PangoLogAttr*
compute_log_attrs (const GtkTextIter *iter,
gint *char_lenp)
{
GtkTextIter start;
GtkTextIter end;
gchar *paragraph;
gint char_len, byte_len;
PangoLogAttr *attrs = NULL;
start = *iter;
end = *iter;
gtk_text_iter_set_line_offset (&start, 0);
gtk_text_iter_forward_line (&end);
paragraph = gtk_text_iter_get_slice (&start, &end);
char_len = g_utf8_strlen (paragraph, -1);
byte_len = strlen (paragraph);
g_assert (char_len > 0);
if (char_lenp)
*char_lenp = char_len;
attrs = g_new (PangoLogAttr, char_len + 1);
/* FIXME we need to follow PangoLayout and allow different language
* tags within the paragraph
*/
pango_get_log_attrs (paragraph, byte_len, -1,
gtk_text_iter_get_language (&start),
attrs,
char_len + 1);
g_free (paragraph);
return attrs;
}
/* The return value from this is valid until you call this a second time.
*/
const PangoLogAttr*
_gtk_text_buffer_get_line_log_attrs (GtkTextBuffer *buffer,
const GtkTextIter *anywhere_in_line,
gint *char_len)
{
gint line;
GtkTextLogAttrCache *cache;
gint i;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (anywhere_in_line != NULL, NULL);
/* special-case for empty last line in buffer */
if (gtk_text_iter_is_end (anywhere_in_line) &&
gtk_text_iter_get_line_offset (anywhere_in_line) == 0)
{
if (char_len)
*char_len = 0;
return NULL;
}
/* FIXME we also need to recompute log attrs if the language tag at
* the start of a paragraph changes
*/
if (buffer->log_attr_cache == NULL)
{
buffer->log_attr_cache = g_new0 (GtkTextLogAttrCache, 1);
buffer->log_attr_cache->chars_changed_stamp =
_gtk_text_btree_get_chars_changed_stamp (get_btree (buffer));
}
else if (buffer->log_attr_cache->chars_changed_stamp !=
_gtk_text_btree_get_chars_changed_stamp (get_btree (buffer)))
{
clear_log_attr_cache (buffer->log_attr_cache);
}
cache = buffer->log_attr_cache;
line = gtk_text_iter_get_line (anywhere_in_line);
i = 0;
while (i < ATTR_CACHE_SIZE)
{
if (cache->entries[i].attrs &&
cache->entries[i].line == line)
{
if (char_len)
*char_len = cache->entries[i].char_len;
return cache->entries[i].attrs;
}
++i;
}
/* Not in cache; open up the first cache entry */
if (cache->entries[ATTR_CACHE_SIZE-1].attrs)
g_free (cache->entries[ATTR_CACHE_SIZE-1].attrs);
g_memmove (cache->entries + 1, cache->entries,
sizeof (CacheEntry) * (ATTR_CACHE_SIZE - 1));
cache->entries[0].line = line;
cache->entries[0].attrs = compute_log_attrs (anywhere_in_line,
&cache->entries[0].char_len);
if (char_len)
*char_len = cache->entries[0].char_len;
return cache->entries[0].attrs;
}
void
_gtk_text_buffer_notify_will_remove_tag (GtkTextBuffer *buffer,
GtkTextTag *tag)
{
/* This removes tag from the buffer, but DOESN'T emit the
* remove_tag signal, because we can't afford to have user
* code messing things up at this point; the tag MUST be removed
* entirely.
*/
if (buffer->btree)
_gtk_text_btree_notify_will_remove_tag (buffer->btree, tag);
}
/*
* Debug spew
*/
void
_gtk_text_buffer_spew (GtkTextBuffer *buffer)
{
_gtk_text_btree_spew (get_btree (buffer));
}
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