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gtk2/gtk/gtktextbuffer.c
Matthias Clasen 6b708e9b60 textbuffer: Redo insert markup a little bit 
Redo the tag insertion function to avoid quadratic
behavior, and at the same time, fix handling of
alpha for color attributes.

Update the copy of this function in gtk4-demo
as well.
2020-09-19 14:17:28 -04:00

4998 lines
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/* GTK - The GIMP Toolkit
* gtktextbuffer.c Copyright (C) 2000 Red Hat, Inc.
* Copyright (C) 2004 Nokia Corporation
*
* 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, see <http://www.gnu.org/licenses/>.
*/
/*
* 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 "config.h"
#include <string.h>
#include <stdarg.h>
#include "gtkmarshalers.h"
#include "gtktextbuffer.h"
#include "gtktexthistoryprivate.h"
#include "gtktextbufferprivate.h"
#include "gtktextbtree.h"
#include "gtktextiterprivate.h"
#include "gtktexttagprivate.h"
#include "gtktexttagtableprivate.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#define DEFAULT_MAX_UNDO 200
/**
* SECTION:gtktextbuffer
* @Short_description: Stores attributed text for display in a GtkTextView
* @Title: GtkTextBuffer
* @See_also: #GtkTextView, #GtkTextIter, #GtkTextMark
*
* You may wish to begin by reading the
* [text widget conceptual overview][TextWidget]
* which gives an overview of all the objects and data
* types related to the text widget and how they work together.
*/
typedef struct _GtkTextLogAttrCache GtkTextLogAttrCache;
struct _GtkTextBufferPrivate
{
GtkTextTagTable *tag_table;
GtkTextBTree *btree;
GSList *selection_clipboards;
GdkContentProvider *selection_content;
GtkTextLogAttrCache *log_attr_cache;
GtkTextHistory *history;
guint user_action_count;
/* Whether the buffer has been modified since last save */
guint modified : 1;
guint has_selection : 1;
guint can_undo : 1;
guint can_redo : 1;
};
typedef struct _ClipboardRequest ClipboardRequest;
struct _ClipboardRequest
{
GtkTextBuffer *buffer;
guint interactive : 1;
guint default_editable : 1;
guint replace_selection : 1;
};
enum {
INSERT_TEXT,
INSERT_PAINTABLE,
INSERT_CHILD_ANCHOR,
DELETE_RANGE,
CHANGED,
MODIFIED_CHANGED,
MARK_SET,
MARK_DELETED,
APPLY_TAG,
REMOVE_TAG,
BEGIN_USER_ACTION,
END_USER_ACTION,
PASTE_DONE,
UNDO,
REDO,
LAST_SIGNAL
};
enum {
PROP_0,
/* Construct */
PROP_TAG_TABLE,
/* Normal */
PROP_TEXT,
PROP_HAS_SELECTION,
PROP_CURSOR_POSITION,
PROP_COPY_TARGET_LIST,
PROP_PASTE_TARGET_LIST,
PROP_CAN_UNDO,
PROP_CAN_REDO,
PROP_ENABLE_UNDO,
LAST_PROP
};
static void gtk_text_buffer_finalize (GObject *object);
static void gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *text,
int len);
static void gtk_text_buffer_real_insert_paintable (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPaintable *paintable);
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 void gtk_text_buffer_real_mark_set (GtkTextBuffer *buffer,
const GtkTextIter *iter,
GtkTextMark *mark);
static void gtk_text_buffer_real_undo (GtkTextBuffer *buffer);
static void gtk_text_buffer_real_redo (GtkTextBuffer *buffer);
static GtkTextBTree* get_btree (GtkTextBuffer *buffer);
static void free_log_attr_cache (GtkTextLogAttrCache *cache);
static void remove_all_selection_clipboards (GtkTextBuffer *buffer);
static void update_selection_clipboards (GtkTextBuffer *buffer);
static void gtk_text_buffer_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_text_buffer_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_text_buffer_history_change_state (gpointer funcs_data,
gboolean is_modified,
gboolean can_undo,
gboolean can_redo);
static void gtk_text_buffer_history_insert (gpointer funcs_data,
guint begin,
guint end,
const char *text,
guint len);
static void gtk_text_buffer_history_delete (gpointer funcs_data,
guint begin,
guint end,
const char *expected_text,
guint len);
static void gtk_text_buffer_history_select (gpointer funcs_data,
int selection_insert,
int selection_bound);
static guint signals[LAST_SIGNAL] = { 0 };
static GParamSpec *text_buffer_props[LAST_PROP];
G_DEFINE_TYPE_WITH_PRIVATE (GtkTextBuffer, gtk_text_buffer, G_TYPE_OBJECT)
#define GTK_TYPE_TEXT_BUFFER_CONTENT (gtk_text_buffer_content_get_type ())
#define GTK_TEXT_BUFFER_CONTENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TEXT_BUFFER_CONTENT, GtkTextBufferContent))
#define GTK_IS_TEXT_BUFFER_CONTENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TEXT_BUFFER_CONTENT))
#define GTK_TEXT_BUFFER_CONTENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT_BUFFER_CONTENT, GtkTextBufferContentClass))
#define GTK_IS_TEXT_BUFFER_CONTENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT_BUFFER_CONTENT))
#define GTK_TEXT_BUFFER_CONTENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT_BUFFER_CONTENT, GtkTextBufferContentClass))
typedef struct _GtkTextBufferContent GtkTextBufferContent;
typedef struct _GtkTextBufferContentClass GtkTextBufferContentClass;
struct _GtkTextBufferContent
{
GdkContentProvider parent;
GtkTextBuffer *text_buffer;
};
struct _GtkTextBufferContentClass
{
GdkContentProviderClass parent_class;
};
GType gtk_text_buffer_content_get_type (void) G_GNUC_CONST;
G_DEFINE_TYPE (GtkTextBufferContent, gtk_text_buffer_content, GDK_TYPE_CONTENT_PROVIDER)
static GtkTextHistoryFuncs history_funcs = {
gtk_text_buffer_history_change_state,
gtk_text_buffer_history_insert,
gtk_text_buffer_history_delete,
gtk_text_buffer_history_select,
};
static GdkContentFormats *
gtk_text_buffer_content_ref_formats (GdkContentProvider *provider)
{
GtkTextBufferContent *content = GTK_TEXT_BUFFER_CONTENT (provider);
if (content->text_buffer)
return gdk_content_formats_new_for_gtype (GTK_TYPE_TEXT_BUFFER);
else
return gdk_content_formats_new (NULL, 0);
}
static gboolean
gtk_text_buffer_content_get_value (GdkContentProvider *provider,
GValue *value,
GError **error)
{
GtkTextBufferContent *content = GTK_TEXT_BUFFER_CONTENT (provider);
if (G_VALUE_HOLDS (value, GTK_TYPE_TEXT_BUFFER) &&
content->text_buffer != NULL)
{
g_value_set_object (value, content->text_buffer);
return TRUE;
}
return GDK_CONTENT_PROVIDER_CLASS (gtk_text_buffer_content_parent_class)->get_value (provider, value, error);
}
static void
gtk_text_buffer_content_detach (GdkContentProvider *provider,
GdkClipboard *clipboard)
{
GtkTextBufferContent *content = GTK_TEXT_BUFFER_CONTENT (provider);
GtkTextIter insert;
GtkTextIter selection_bound;
if (content->text_buffer == NULL)
return;
/* Move selection_bound to the insertion point */
gtk_text_buffer_get_iter_at_mark (content->text_buffer, &insert,
gtk_text_buffer_get_insert (content->text_buffer));
gtk_text_buffer_get_iter_at_mark (content->text_buffer, &selection_bound,
gtk_text_buffer_get_selection_bound (content->text_buffer));
if (!gtk_text_iter_equal (&insert, &selection_bound))
gtk_text_buffer_move_mark (content->text_buffer,
gtk_text_buffer_get_selection_bound (content->text_buffer),
&insert);
}
static void
gtk_text_buffer_content_class_init (GtkTextBufferContentClass *class)
{
GdkContentProviderClass *provider_class = GDK_CONTENT_PROVIDER_CLASS (class);
provider_class->ref_formats = gtk_text_buffer_content_ref_formats;
provider_class->get_value = gtk_text_buffer_content_get_value;
provider_class->detach_clipboard = gtk_text_buffer_content_detach;
}
static void
gtk_text_buffer_content_init (GtkTextBufferContent *content)
{
}
static GdkContentProvider *
gtk_text_buffer_content_new (GtkTextBuffer *buffer)
{
GtkTextBufferContent *content;
content = g_object_new (GTK_TYPE_TEXT_BUFFER_CONTENT, NULL);
content->text_buffer = g_object_ref (buffer);
return GDK_CONTENT_PROVIDER (content);
}
static void
gtk_text_buffer_deserialize_text_plain_finish (GObject *source,
GAsyncResult *result,
gpointer deserializer)
{
GOutputStream *stream = G_OUTPUT_STREAM (source);
GtkTextBuffer *buffer;
GtkTextIter start, end;
GError *error = NULL;
gssize written;
written = g_output_stream_splice_finish (stream, result, &error);
if (written < 0)
{
gdk_content_deserializer_return_error (deserializer, error);
return;
}
buffer = g_value_get_object (gdk_content_deserializer_get_value (deserializer));
gtk_text_buffer_get_end_iter (buffer, &end);
gtk_text_buffer_insert (buffer,
&end,
g_memory_output_stream_steal_data (G_MEMORY_OUTPUT_STREAM (
g_filter_output_stream_get_base_stream (G_FILTER_OUTPUT_STREAM (stream)))),
-1);
gtk_text_buffer_get_bounds (buffer, &start, &end);
gtk_text_buffer_select_range (buffer, &start, &end);
gdk_content_deserializer_return_success (deserializer);
}
static void
gtk_text_buffer_deserialize_text_plain (GdkContentDeserializer *deserializer)
{
GOutputStream *output, *filter;
GCharsetConverter *converter;
GtkTextBuffer *buffer;
GError *error = NULL;
buffer = gtk_text_buffer_new (NULL);
g_value_set_object (gdk_content_deserializer_get_value (deserializer),
buffer);
/* validates the stream */
converter = g_charset_converter_new ("utf-8", "utf-8", &error);
if (converter == NULL)
{
gdk_content_deserializer_return_error (deserializer, error);
return;
}
g_charset_converter_set_use_fallback (converter, TRUE);
output = g_memory_output_stream_new_resizable ();
filter = g_converter_output_stream_new (output, G_CONVERTER (converter));
g_object_unref (output);
g_object_unref (converter);
g_output_stream_splice_async (filter,
gdk_content_deserializer_get_input_stream (deserializer),
G_OUTPUT_STREAM_SPLICE_CLOSE_SOURCE | G_OUTPUT_STREAM_SPLICE_CLOSE_TARGET,
gdk_content_deserializer_get_priority (deserializer),
gdk_content_deserializer_get_cancellable (deserializer),
gtk_text_buffer_deserialize_text_plain_finish,
deserializer);
g_object_unref (filter);
}
static void
gtk_text_buffer_serialize_text_plain_finish (GObject *source,
GAsyncResult *result,
gpointer serializer)
{
GOutputStream *stream = G_OUTPUT_STREAM (source);
GError *error = NULL;
if (!g_output_stream_write_all_finish (stream, result, NULL, &error))
gdk_content_serializer_return_error (serializer, error);
else
gdk_content_serializer_return_success (serializer);
}
static void
gtk_text_buffer_serialize_text_plain (GdkContentSerializer *serializer)
{
GtkTextBuffer *buffer;
GtkTextIter start, end;
char *str;
buffer = g_value_get_object (gdk_content_serializer_get_value (serializer));
if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
str = gtk_text_iter_get_visible_text (&start, &end);
}
else
{
str = g_strdup ("");
}
gdk_content_serializer_set_task_data (serializer, str, g_free);
g_output_stream_write_all_async (gdk_content_serializer_get_output_stream (serializer),
str,
strlen (str) + 1,
gdk_content_serializer_get_priority (serializer),
gdk_content_serializer_get_cancellable (serializer),
gtk_text_buffer_serialize_text_plain_finish,
serializer);
}
static void
gtk_text_buffer_register_serializers (void)
{
gdk_content_register_deserializer ("text/plain;charset=utf-8",
GTK_TYPE_TEXT_BUFFER,
gtk_text_buffer_deserialize_text_plain,
NULL,
NULL);
gdk_content_register_serializer (GTK_TYPE_TEXT_BUFFER,
"text/plain;charset=utf-8",
gtk_text_buffer_serialize_text_plain,
NULL,
NULL);
}
static void
gtk_text_buffer_class_init (GtkTextBufferClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
object_class->finalize = gtk_text_buffer_finalize;
object_class->set_property = gtk_text_buffer_set_property;
object_class->get_property = gtk_text_buffer_get_property;
klass->insert_text = gtk_text_buffer_real_insert_text;
klass->insert_paintable = gtk_text_buffer_real_insert_paintable;
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;
klass->mark_set = gtk_text_buffer_real_mark_set;
klass->undo = gtk_text_buffer_real_undo;
klass->redo = gtk_text_buffer_real_redo;
/* Construct */
text_buffer_props[PROP_TAG_TABLE] =
g_param_spec_object ("tag-table",
P_("Tag Table"),
P_("Text Tag Table"),
GTK_TYPE_TEXT_TAG_TABLE,
GTK_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
/* Normal properties */
/**
* GtkTextBuffer:text:
*
* The text content of the buffer. Without child widgets and images,
* see gtk_text_buffer_get_text() for more information.
*/
text_buffer_props[PROP_TEXT] =
g_param_spec_string ("text",
P_("Text"),
P_("Current text of the buffer"),
"",
GTK_PARAM_READWRITE);
/**
* GtkTextBuffer:has-selection:
*
* Whether the buffer has some text currently selected.
*/
text_buffer_props[PROP_HAS_SELECTION] =
g_param_spec_boolean ("has-selection",
P_("Has selection"),
P_("Whether the buffer has some text currently selected"),
FALSE,
GTK_PARAM_READABLE);
/**
* GtkTextBuffer:can-undo:
*
* The #GtkTextBuffer:can-undo property denotes that the buffer can undo the last
* applied action.
*/
text_buffer_props[PROP_CAN_UNDO] =
g_param_spec_boolean ("can-undo",
P_("Can Undo"),
P_("If the buffer can have the last action undone"),
FALSE,
GTK_PARAM_READABLE);
/**
* GtkTextBuffer:can-redo:
*
* The #GtkTextBuffer:can-redo property denotes that the buffer can reapply the
* last undone action.
*/
text_buffer_props[PROP_CAN_REDO] =
g_param_spec_boolean ("can-redo",
P_("Can Redo"),
P_("If the buffer can have the last undone action reapplied"),
FALSE,
GTK_PARAM_READABLE);
/**
* GtkTextBuffer:enable-undo:
*
* The #GtkTextBuffer:enable-undo property denotes if support for undoing and
* redoing changes to the buffer is allowed.
*/
text_buffer_props[PROP_ENABLE_UNDO] =
g_param_spec_boolean ("enable-undo",
"Enable Undo",
"Enable support for undo and redo in the text view",
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY);
/**
* GtkTextBuffer:cursor-position:
*
* The position of the insert mark (as offset from the beginning
* of the buffer). It is useful for getting notified when the
* cursor moves.
*/
text_buffer_props[PROP_CURSOR_POSITION] =
g_param_spec_int ("cursor-position",
P_("Cursor position"),
P_("The position of the insert mark (as offset from the beginning of the buffer)"),
0, G_MAXINT,
0,
GTK_PARAM_READABLE);
/**
* GtkTextBuffer:copy-target-list:
*
* The list of targets this buffer supports for clipboard copying
* and as DND source.
*/
text_buffer_props[PROP_COPY_TARGET_LIST] =
g_param_spec_boxed ("copy-target-list",
P_("Copy target list"),
P_("The list of targets this buffer supports for clipboard copying and DND source"),
GDK_TYPE_CONTENT_FORMATS,
GTK_PARAM_READABLE);
/**
* GtkTextBuffer:paste-target-list:
*
* The list of targets this buffer supports for clipboard pasting
* and as DND destination.
*/
text_buffer_props[PROP_PASTE_TARGET_LIST] =
g_param_spec_boxed ("paste-target-list",
P_("Paste target list"),
P_("The list of targets this buffer supports for clipboard pasting and DND destination"),
GDK_TYPE_CONTENT_FORMATS,
GTK_PARAM_READABLE);
g_object_class_install_properties (object_class, LAST_PROP, text_buffer_props);
/**
* GtkTextBuffer::insert-text:
* @textbuffer: the object which received the signal
* @location: position to insert @text in @textbuffer
* @text: the UTF-8 text to be inserted
* @len: length of the inserted text in bytes
*
* The ::insert-text signal is emitted to insert text in a #GtkTextBuffer.
* Insertion actually occurs in the default handler.
*
* Note that if your handler runs before the default handler it must not
* invalidate the @location iter (or has to revalidate it).
* The default signal handler revalidates it to point to the end of the
* inserted text.
*
* See also:
* gtk_text_buffer_insert(),
* gtk_text_buffer_insert_range().
*/
signals[INSERT_TEXT] =
g_signal_new (I_("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,
G_TYPE_NONE,
3,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_STRING | G_SIGNAL_TYPE_STATIC_SCOPE,
G_TYPE_INT);
g_signal_set_va_marshaller (signals[INSERT_TEXT], G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__BOXED_STRING_INTv);
/**
* GtkTextBuffer::insert-paintable:
* @textbuffer: the object which received the signal
* @location: position to insert @paintable in @textbuffer
* @paintable: the #GdkPaintable to be inserted
*
* The #GtkTextBuffer::insert-paintable signal is emitted to insert a #GdkPaintable
* in a #GtkTextBuffer. Insertion actually occurs in the default handler.
*
* Note that if your handler runs before the default handler it must not
* invalidate the @location iter (or has to revalidate it).
* The default signal handler revalidates it to be placed after the
* inserted @paintable.
*
* See also: gtk_text_buffer_insert_paintable().
*/
signals[INSERT_PAINTABLE] =
g_signal_new (I_("insert-paintable"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, insert_paintable),
NULL, NULL,
_gtk_marshal_VOID__BOXED_OBJECT,
G_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GDK_TYPE_PAINTABLE);
g_signal_set_va_marshaller (signals[INSERT_PAINTABLE],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__BOXED_OBJECTv);
/**
* GtkTextBuffer::insert-child-anchor:
* @textbuffer: the object which received the signal
* @location: position to insert @anchor in @textbuffer
* @anchor: the #GtkTextChildAnchor to be inserted
*
* The #GtkTextBuffer::insert-child-anchor signal is emitted to insert a
* #GtkTextChildAnchor in a #GtkTextBuffer.
* Insertion actually occurs in the default handler.
*
* Note that if your handler runs before the default handler it must
* not invalidate the @location iter (or has to revalidate it).
* The default signal handler revalidates it to be placed after the
* inserted @anchor.
*
* See also: gtk_text_buffer_insert_child_anchor().
*/
signals[INSERT_CHILD_ANCHOR] =
g_signal_new (I_("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,
G_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GTK_TYPE_TEXT_CHILD_ANCHOR);
g_signal_set_va_marshaller (signals[INSERT_CHILD_ANCHOR],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__BOXED_OBJECTv);
/**
* GtkTextBuffer::delete-range:
* @textbuffer: the object which received the signal
* @start: the start of the range to be deleted
* @end: the end of the range to be deleted
*
* The #GtkTextBuffer::delete-range signal is emitted to delete a range
* from a #GtkTextBuffer.
*
* Note that if your handler runs before the default handler it must not
* invalidate the @start and @end iters (or has to revalidate them).
* The default signal handler revalidates the @start and @end iters to
* both point to the location where text was deleted. Handlers
* which run after the default handler (see g_signal_connect_after())
* do not have access to the deleted text.
*
* See also: gtk_text_buffer_delete().
*/
signals[DELETE_RANGE] =
g_signal_new (I_("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,
G_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE,
GTK_TYPE_TEXT_ITER | G_SIGNAL_TYPE_STATIC_SCOPE);
g_signal_set_va_marshaller (signals[DELETE_RANGE],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__BOXED_BOXEDv);
/**
* GtkTextBuffer::changed:
* @textbuffer: the object which received the signal
*
* The #GtkTextBuffer::changed signal is emitted when the content of a #GtkTextBuffer
* has changed.
*/
signals[CHANGED] =
g_signal_new (I_("changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, changed),
NULL, NULL,
NULL,
G_TYPE_NONE,
0);
/**
* GtkTextBuffer::modified-changed:
* @textbuffer: the object which received the signal
*
* The #GtkTextBuffer::modified-changed signal is emitted when the modified bit of a
* #GtkTextBuffer flips.
*
* See also:
* gtk_text_buffer_set_modified().
*/
signals[MODIFIED_CHANGED] =
g_signal_new (I_("modified-changed"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, modified_changed),
NULL, NULL,
NULL,
G_TYPE_NONE,
0);
/**
* GtkTextBuffer::mark-set:
* @textbuffer: the object which received the signal
* @location: The location of @mark in @textbuffer
* @mark: The mark that is set
*
* The #GtkTextBuffer::mark-set signal is emitted as notification
* after a #GtkTextMark is set.
*
* See also:
* gtk_text_buffer_create_mark(),
* gtk_text_buffer_move_mark().
*/
signals[MARK_SET] =
g_signal_new (I_("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,
G_TYPE_NONE,
2,
GTK_TYPE_TEXT_ITER,
GTK_TYPE_TEXT_MARK);
g_signal_set_va_marshaller (signals[MARK_SET],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__BOXED_OBJECTv);
/**
* GtkTextBuffer::mark-deleted:
* @textbuffer: the object which received the signal
* @mark: The mark that was deleted
*
* The #GtkTextBuffer::mark-deleted signal is emitted as notification
* after a #GtkTextMark is deleted.
*
* See also:
* gtk_text_buffer_delete_mark().
*/
signals[MARK_DELETED] =
g_signal_new (I_("mark-deleted"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, mark_deleted),
NULL, NULL,
NULL,
G_TYPE_NONE,
1,
GTK_TYPE_TEXT_MARK);
/**
* GtkTextBuffer::apply-tag:
* @textbuffer: the object which received the signal
* @tag: the applied tag
* @start: the start of the range the tag is applied to
* @end: the end of the range the tag is applied to
*
* The #GtkTextBuffer::apply-tag signal is emitted to apply a tag to a
* range of text in a #GtkTextBuffer.
* Applying actually occurs in the default handler.
*
* Note that if your handler runs before the default handler it must not
* invalidate the @start and @end iters (or has to revalidate them).
*
* See also:
* gtk_text_buffer_apply_tag(),
* gtk_text_buffer_insert_with_tags(),
* gtk_text_buffer_insert_range().
*/
signals[APPLY_TAG] =
g_signal_new (I_("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,
G_TYPE_NONE,
3,
GTK_TYPE_TEXT_TAG,
GTK_TYPE_TEXT_ITER,
GTK_TYPE_TEXT_ITER);
g_signal_set_va_marshaller (signals[APPLY_TAG],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__OBJECT_BOXED_BOXEDv);
/**
* GtkTextBuffer::remove-tag:
* @textbuffer: the object which received the signal
* @tag: the tag to be removed
* @start: the start of the range the tag is removed from
* @end: the end of the range the tag is removed from
*
* The #GtkTextBuffer::remove-tag signal is emitted to remove all occurrences
* of @tag from a range of text in a #GtkTextBuffer.
* Removal actually occurs in the default handler.
*
* Note that if your handler runs before the default handler it must not
* invalidate the @start and @end iters (or has to revalidate them).
*
* See also:
* gtk_text_buffer_remove_tag().
*/
signals[REMOVE_TAG] =
g_signal_new (I_("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,
G_TYPE_NONE,
3,
GTK_TYPE_TEXT_TAG,
GTK_TYPE_TEXT_ITER,
GTK_TYPE_TEXT_ITER);
g_signal_set_va_marshaller (signals[REMOVE_TAG],
G_TYPE_FROM_CLASS (klass),
_gtk_marshal_VOID__OBJECT_BOXED_BOXEDv);
/**
* GtkTextBuffer::begin-user-action:
* @textbuffer: the object which received the signal
*
* The #GtkTextBuffer::begin-user-action signal is emitted at the beginning of a single
* user-visible operation on a #GtkTextBuffer.
*
* See also:
* gtk_text_buffer_begin_user_action(),
* gtk_text_buffer_insert_interactive(),
* gtk_text_buffer_insert_range_interactive(),
* gtk_text_buffer_delete_interactive(),
* gtk_text_buffer_backspace(),
* gtk_text_buffer_delete_selection().
*/
signals[BEGIN_USER_ACTION] =
g_signal_new (I_("begin-user-action"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, begin_user_action),
NULL, NULL,
NULL,
G_TYPE_NONE,
0);
/**
* GtkTextBuffer::end-user-action:
* @textbuffer: the object which received the signal
*
* The #GtkTextBuffer::end-user-action signal is emitted at the end of a single
* user-visible operation on the #GtkTextBuffer.
*
* See also:
* gtk_text_buffer_end_user_action(),
* gtk_text_buffer_insert_interactive(),
* gtk_text_buffer_insert_range_interactive(),
* gtk_text_buffer_delete_interactive(),
* gtk_text_buffer_backspace(),
* gtk_text_buffer_delete_selection(),
* gtk_text_buffer_backspace().
*/
signals[END_USER_ACTION] =
g_signal_new (I_("end-user-action"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, end_user_action),
NULL, NULL,
NULL,
G_TYPE_NONE,
0);
/**
* GtkTextBuffer::paste-done:
* @textbuffer: the object which received the signal
* @clipboard: the #GdkClipboard pasted from
*
* The paste-done signal is emitted after paste operation has been completed.
* This is useful to properly scroll the view to the end of the pasted text.
* See gtk_text_buffer_paste_clipboard() for more details.
*/
signals[PASTE_DONE] =
g_signal_new (I_("paste-done"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, paste_done),
NULL, NULL,
NULL,
G_TYPE_NONE,
1,
GDK_TYPE_CLIPBOARD);
/**
* GtkTextBuffer::redo:
* @buffer: a #GtkTextBuffer
*
* The "redo" signal is emitted when a request has been made to redo the
* previously undone operation.
*/
signals[REDO] =
g_signal_new (I_("redo"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, redo),
NULL, NULL, NULL, G_TYPE_NONE, 0);
/**
* GtkTextBuffer::undo:
* @buffer: a #GtkTextBuffer
*
* The "undo" signal is emitted when a request has been made to undo the
* previous operation or set of operations that have been grouped together.
*/
signals[UNDO] =
g_signal_new (I_("undo"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkTextBufferClass, undo),
NULL, NULL, NULL, G_TYPE_NONE, 0);
gtk_text_buffer_register_serializers ();
}
static void
gtk_text_buffer_init (GtkTextBuffer *buffer)
{
buffer->priv = gtk_text_buffer_get_instance_private (buffer);
buffer->priv->tag_table = NULL;
buffer->priv->history = gtk_text_history_new (&history_funcs, buffer);
gtk_text_history_set_max_undo_levels (buffer->priv->history, DEFAULT_MAX_UNDO);
}
static void
set_table (GtkTextBuffer *buffer, GtkTextTagTable *table)
{
GtkTextBufferPrivate *priv = buffer->priv;
g_return_if_fail (priv->tag_table == NULL);
if (table)
{
priv->tag_table = table;
g_object_ref (priv->tag_table);
_gtk_text_tag_table_add_buffer (table, buffer);
}
}
static GtkTextTagTable*
get_table (GtkTextBuffer *buffer)
{
GtkTextBufferPrivate *priv = buffer->priv;
if (priv->tag_table == NULL)
{
priv->tag_table = gtk_text_tag_table_new ();
_gtk_text_tag_table_add_buffer (priv->tag_table, buffer);
}
return priv->tag_table;
}
static void
gtk_text_buffer_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkTextBuffer *text_buffer;
text_buffer = GTK_TEXT_BUFFER (object);
switch (prop_id)
{
case PROP_ENABLE_UNDO:
gtk_text_buffer_set_enable_undo (text_buffer, g_value_get_boolean (value));
break;
case PROP_TAG_TABLE:
set_table (text_buffer, g_value_get_object (value));
break;
case PROP_TEXT:
gtk_text_buffer_set_text (text_buffer,
g_value_get_string (value), -1);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_text_buffer_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkTextBuffer *text_buffer;
GtkTextIter iter;
text_buffer = GTK_TEXT_BUFFER (object);
switch (prop_id)
{
case PROP_ENABLE_UNDO:
g_value_set_boolean (value, gtk_text_buffer_get_enable_undo (text_buffer));
break;
case PROP_TAG_TABLE:
g_value_set_object (value, get_table (text_buffer));
break;
case PROP_TEXT:
{
GtkTextIter start, end;
gtk_text_buffer_get_start_iter (text_buffer, &start);
gtk_text_buffer_get_end_iter (text_buffer, &end);
g_value_take_string (value,
gtk_text_buffer_get_text (text_buffer,
&start, &end, FALSE));
break;
}
case PROP_HAS_SELECTION:
g_value_set_boolean (value, text_buffer->priv->has_selection);
break;
case PROP_CURSOR_POSITION:
gtk_text_buffer_get_iter_at_mark (text_buffer, &iter,
gtk_text_buffer_get_insert (text_buffer));
g_value_set_int (value, gtk_text_iter_get_offset (&iter));
break;
case PROP_CAN_UNDO:
g_value_set_boolean (value, gtk_text_buffer_get_can_undo (text_buffer));
break;
case PROP_CAN_REDO:
g_value_set_boolean (value, gtk_text_buffer_get_can_redo (text_buffer));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_text_buffer_new:
* @table: (allow-none): a tag table, or %NULL to create a new one
*
* Creates a new text buffer.
*
* Returns: a new text buffer
**/
GtkTextBuffer*
gtk_text_buffer_new (GtkTextTagTable *table)
{
GtkTextBuffer *text_buffer;
text_buffer = g_object_new (GTK_TYPE_TEXT_BUFFER, "tag-table", table, NULL);
return text_buffer;
}
static void
gtk_text_buffer_finalize (GObject *object)
{
GtkTextBuffer *buffer;
GtkTextBufferPrivate *priv;
buffer = GTK_TEXT_BUFFER (object);
priv = buffer->priv;
remove_all_selection_clipboards (buffer);
g_clear_object (&buffer->priv->history);
if (priv->tag_table)
{
_gtk_text_tag_table_remove_buffer (priv->tag_table, buffer);
g_object_unref (priv->tag_table);
priv->tag_table = NULL;
}
if (priv->btree)
{
_gtk_text_btree_unref (priv->btree);
priv->btree = NULL;
}
if (priv->log_attr_cache)
free_log_attr_cache (priv->log_attr_cache);
priv->log_attr_cache = NULL;
G_OBJECT_CLASS (gtk_text_buffer_parent_class)->finalize (object);
}
static GtkTextBTree*
get_btree (GtkTextBuffer *buffer)
{
GtkTextBufferPrivate *priv = buffer->priv;
if (priv->btree == NULL)
priv->btree = _gtk_text_btree_new (gtk_text_buffer_get_tag_table (buffer),
buffer);
return priv->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.
*
* Returns: (transfer none): 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 char *text,
int 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_history_begin_irreversible_action (buffer->priv->history);
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);
}
gtk_text_history_end_irreversible_action (buffer->priv->history);
}
/*
* Insertion
*/
static void
gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *text,
int len)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
gtk_text_history_text_inserted (buffer->priv->history,
gtk_text_iter_get_offset (iter),
text,
len);
_gtk_text_btree_insert (iter, text, len);
g_signal_emit (buffer, signals[CHANGED], 0);
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_CURSOR_POSITION]);
}
static void
gtk_text_buffer_emit_insert (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *text,
int 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 (buffer, signals[INSERT_TEXT], 0,
iter, text, len);
}
}
/**
* gtk_text_buffer_insert:
* @buffer: a #GtkTextBuffer
* @iter: a position in the buffer
* @text: text in UTF-8 format
* @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 char *text,
int 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: 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 char *text,
int 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_insert (buffer));
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.
*
* Returns: whether text was actually inserted
**/
gboolean
gtk_text_buffer_insert_interactive (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *text,
int 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.
*
* Returns: whether text was actually inserted
**/
gboolean
gtk_text_buffer_insert_interactive_at_cursor (GtkTextBuffer *buffer,
const char *text,
int 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_insert (buffer));
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)
{
char *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_slice_new (Range);
r->buffer = gtk_text_iter_get_buffer (range_start);
g_object_ref (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 (r->buffer);
g_slice_free (Range, 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;
Range *r;
if (gtk_text_iter_equal (orig_start, orig_end))
return;
start = *orig_start;
end = *orig_end;
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)
{
GdkPaintable *paintable;
GtkTextChildAnchor *anchor;
paintable = gtk_text_iter_get_paintable (&range_end);
anchor = gtk_text_iter_get_child_anchor (&range_end);
if (paintable)
{
r = save_range (&range_start,
&range_end,
&end);
gtk_text_buffer_insert_paintable (buffer, iter, paintable);
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;
gboolean insert_tags;
if (gtk_text_iter_equal (orig_start, orig_end))
return;
insert_tags = gtk_text_buffer_get_tag_table (gtk_text_iter_get_buffer (orig_start))
== gtk_text_buffer_get_tag_table (buffer);
gtk_text_iter_order (&start, &end);
range_start = start;
range_end = start;
while (TRUE)
{
int 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;
if (insert_tags)
{
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 = tmp_list->next;
}
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 paintables 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)->priv->tag_table ==
buffer->priv->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)->priv->tag_table ==
buffer->priv->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
* @...: %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 char *text,
int len,
GtkTextTag *first_tag,
...)
{
int 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
* @...: 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 char *text,
int len,
const char *first_tag_name,
...)
{
int start_offset;
GtkTextIter start;
va_list args;
const char *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->priv->tag_table,
tag_name);
if (tag == NULL)
{
g_warning ("%s: no tag with name '%s'!", G_STRLOC, tag_name);
va_end (args);
return;
}
gtk_text_buffer_apply_tag (buffer, tag, &start, iter);
tag_name = va_arg (args, const char *);
}
va_end (args);
}
/*
* Deletion
*/
static void
gtk_text_buffer_real_delete_range (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
gboolean has_selection;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (start != NULL);
g_return_if_fail (end != NULL);
if (gtk_text_history_get_enabled (buffer->priv->history))
{
GtkTextIter sel_begin, sel_end;
char *text;
if (gtk_text_buffer_get_selection_bounds (buffer, &sel_begin, &sel_end))
gtk_text_history_selection_changed (buffer->priv->history,
gtk_text_iter_get_offset (&sel_begin),
gtk_text_iter_get_offset (&sel_end));
else
gtk_text_history_selection_changed (buffer->priv->history,
gtk_text_iter_get_offset (&sel_begin),
-1);
text = gtk_text_iter_get_slice (start, end);
gtk_text_history_text_deleted (buffer->priv->history,
gtk_text_iter_get_offset (start),
gtk_text_iter_get_offset (end),
text, -1);
g_free (text);
}
_gtk_text_btree_delete (start, end);
/* may have deleted the selection... */
update_selection_clipboards (buffer);
has_selection = gtk_text_buffer_get_selection_bounds (buffer, NULL, NULL);
if (has_selection != buffer->priv->has_selection)
{
buffer->priv->has_selection = has_selection;
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_HAS_SELECTION]);
}
g_signal_emit (buffer, signals[CHANGED], 0);
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_CURSOR_POSITION]);
}
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 (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 editable 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.
*
* Returns: 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);
gtk_text_buffer_get_iter_at_mark (buffer, &iter, start_mark);
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);
/* It's more robust to ask for the state again then to assume that
* we're on the next not-editable segment. We don't know what the
* ::delete-range handler did.... maybe it deleted the following
* not-editable segment because it was associated with the editable
* segment.
*/
current_state = gtk_text_iter_editable (&iter, default_editable);
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 not correspond to byte
* and character indexes into the buffer. Contrast with
* gtk_text_buffer_get_slice().
*
* Returns: (transfer full): an allocated UTF-8 string
**/
char *
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 do 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 paintable or
* widget is in the buffer.
*
* Returns: (transfer full): an allocated UTF-8 string
**/
char *
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_paintable (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPaintable *paintable)
{
_gtk_text_btree_insert_paintable (iter, paintable);
g_signal_emit (buffer, signals[CHANGED], 0);
}
/**
* gtk_text_buffer_insert_paintable:
* @buffer: a #GtkTextBuffer
* @iter: location to insert the paintable
* @paintable: a #GdkPaintable
*
* 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 paintable, 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_paintable (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPaintable *paintable)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (iter != NULL);
g_return_if_fail (GDK_IS_PAINTABLE (paintable));
g_return_if_fail (gtk_text_iter_get_buffer (iter) == buffer);
g_signal_emit (buffer, signals[INSERT_PAINTABLE], 0, iter, paintable);
}
/*
* 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 (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 (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().
*
* Returns: (transfer none): 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 (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 (mark);
g_signal_emit (buffer,
signals[MARK_SET],
0,
location,
mark);
g_object_unref (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.
*
* Returns: mark
**/
static GtkTextMark*
gtk_text_buffer_set_mark (GtkTextBuffer *buffer,
GtkTextMark *existing_mark,
const char *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);
_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: (allow-none): 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 not 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 #GtkTextBuffer::mark-set signal as notification of the mark's
* initial placement.
*
* Returns: (transfer none): the new #GtkTextMark object
**/
GtkTextMark*
gtk_text_buffer_create_mark (GtkTextBuffer *buffer,
const char *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_add_mark:
* @buffer: a #GtkTextBuffer
* @mark: the mark to add
* @where: location to place mark
*
* Adds the mark at position @where. The mark must not be added to
* another buffer, and if its name is not %NULL then there must not
* be another mark in the buffer with the same name.
*
* Emits the #GtkTextBuffer::mark-set signal as notification of the mark's
* initial placement.
**/
void
gtk_text_buffer_add_mark (GtkTextBuffer *buffer,
GtkTextMark *mark,
const GtkTextIter *where)
{
const char *name;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
g_return_if_fail (GTK_IS_TEXT_MARK (mark));
g_return_if_fail (where != NULL);
g_return_if_fail (gtk_text_mark_get_buffer (mark) == NULL);
name = gtk_text_mark_get_name (mark);
if (name != NULL && gtk_text_buffer_get_mark (buffer, name) != NULL)
{
g_critical ("Mark %s already exists in the buffer", name);
return;
}
gtk_text_buffer_set_mark (buffer, mark, NULL, where, FALSE, 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 #GtkTextBuffer::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: (out): 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, until it gets added to a buffer again with
* gtk_text_buffer_add_mark(). Use gtk_text_mark_get_deleted() to
* find out if a mark has been removed from its buffer.
* The #GtkTextBuffer::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 (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 (buffer, signals[MARK_DELETED],
0,
mark);
g_object_unref (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.
*
* Returns: (nullable) (transfer none): a #GtkTextMark, or %NULL
**/
GtkTextMark*
gtk_text_buffer_get_mark (GtkTextBuffer *buffer,
const char *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 char *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 char *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.
*
* Returns: (transfer none): insertion point mark
**/
GtkTextMark*
gtk_text_buffer_get_insert (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
return _gtk_text_btree_get_insert (get_btree (buffer));
}
/**
* 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.
*
* Returns: (transfer none): selection bound mark
**/
GtkTextMark*
gtk_text_buffer_get_selection_bound (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
return _gtk_text_btree_get_selection_bound (get_btree (buffer));
}
/**
* gtk_text_buffer_get_iter_at_child_anchor:
* @buffer: a #GtkTextBuffer
* @iter: (out): 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)
{
gtk_text_buffer_select_range (buffer, where, where);
}
/**
* gtk_text_buffer_select_range:
* @buffer: a #GtkTextBuffer
* @ins: where to put the “insert” mark
* @bound: where to put the “selection_bound” mark
*
* This function moves the “insert” and “selection_bound” marks
* simultaneously. If you move them 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_select_range (GtkTextBuffer *buffer,
const GtkTextIter *ins,
const GtkTextIter *bound)
{
GtkTextIter real_ins;
GtkTextIter real_bound;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
real_ins = *ins;
real_bound = *bound;
_gtk_text_btree_select_range (get_btree (buffer), &real_ins, &real_bound);
gtk_text_buffer_mark_set (buffer, &real_ins,
gtk_text_buffer_get_insert (buffer));
gtk_text_buffer_mark_set (buffer, &real_bound,
gtk_text_buffer_get_selection_bound (buffer));
}
/*
* Tags
*/
/**
* gtk_text_buffer_create_tag:
* @buffer: a #GtkTextBuffer
* @tag_name: (allow-none): name of the new tag, or %NULL
* @first_property_name: (allow-none): name of first property to set, or %NULL
* @...: %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().
*
* Returns: (transfer none): a new tag
*/
GtkTextTag*
gtk_text_buffer_create_tag (GtkTextBuffer *buffer,
const char *tag_name,
const char *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);
if (!gtk_text_tag_table_add (get_table (buffer), tag))
{
g_object_unref (tag);
return NULL;
}
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->priv->table != buffer->priv->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->priv->table != buffer->priv->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);
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_TEXT]);
}
static void
gtk_text_buffer_real_mark_set (GtkTextBuffer *buffer,
const GtkTextIter *iter,
GtkTextMark *mark)
{
GtkTextMark *insert;
insert = gtk_text_buffer_get_insert (buffer);
if (mark == insert || mark == gtk_text_buffer_get_selection_bound (buffer))
{
gboolean has_selection;
update_selection_clipboards (buffer);
has_selection = gtk_text_buffer_get_selection_bounds (buffer,
NULL,
NULL);
if (has_selection != buffer->priv->has_selection)
{
buffer->priv->has_selection = has_selection;
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_HAS_SELECTION]);
}
}
if (mark == insert)
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_CURSOR_POSITION]);
}
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 (buffer, signals[APPLY_TAG],
0,
tag, &start_tmp, &end_tmp);
else
g_signal_emit (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->priv->table == buffer->priv->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->priv->table == buffer->priv->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 char *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 char *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 int
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, *next;
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 = tmp_list2->next;
}
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 */
next = tmp_list->next;
if (prev)
prev->next = next;
tmp_list->next = NULL;
g_slist_free (tmp_list);
tmp_list = 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_free_full (tags, g_object_unref);
}
/*
* Obtain various iterators
*/
/**
* gtk_text_buffer_get_iter_at_line_offset:
* @buffer: a #GtkTextBuffer
* @iter: (out): 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. Note
* characters, not bytes; UTF-8 may encode one character as multiple bytes.
*
* Before the 3.20 version, it was not allowed to pass an invalid location.
*
* If @line_number is greater than the number of lines
* in the @buffer, the end iterator is returned. And if @char_offset is off the
* end of the line, the iterator at the end of the line is returned.
**/
void
gtk_text_buffer_get_iter_at_line_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
int line_number,
int char_offset)
{
GtkTextIter end_line_iter;
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (line_number >= gtk_text_buffer_get_line_count (buffer))
{
gtk_text_buffer_get_end_iter (buffer, iter);
return;
}
_gtk_text_btree_get_iter_at_line_char (get_btree (buffer), iter, line_number, 0);
end_line_iter = *iter;
if (!gtk_text_iter_ends_line (&end_line_iter))
gtk_text_iter_forward_to_line_end (&end_line_iter);
if (char_offset <= gtk_text_iter_get_line_offset (&end_line_iter))
gtk_text_iter_set_line_offset (iter, char_offset);
else
*iter = end_line_iter;
}
/**
* gtk_text_buffer_get_iter_at_line_index:
* @buffer: a #GtkTextBuffer
* @iter: (out): 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. Note bytes, not
* characters; UTF-8 may encode one character as multiple bytes.
*
* If @line_number is greater than the number of lines
* in the @buffer, the end iterator is returned. And if @byte_index is off the
* end of the line, the iterator at the end of the line is returned.
**/
void
gtk_text_buffer_get_iter_at_line_index (GtkTextBuffer *buffer,
GtkTextIter *iter,
int line_number,
int byte_index)
{
GtkTextIter end_line_iter;
g_return_if_fail (iter != NULL);
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (line_number >= gtk_text_buffer_get_line_count (buffer))
{
gtk_text_buffer_get_end_iter (buffer, iter);
return;
}
gtk_text_buffer_get_iter_at_line (buffer, iter, line_number);
end_line_iter = *iter;
if (!gtk_text_iter_ends_line (&end_line_iter))
gtk_text_iter_forward_to_line_end (&end_line_iter);
if (byte_index <= gtk_text_iter_get_line_index (&end_line_iter))
gtk_text_iter_set_line_index (iter, byte_index);
else
*iter = end_line_iter;
}
/**
* gtk_text_buffer_get_iter_at_line:
* @buffer: a #GtkTextBuffer
* @iter: (out): iterator to initialize
* @line_number: line number counting from 0
*
* Initializes @iter to the start of the given line. If @line_number is greater
* than the number of lines in the @buffer, the end iterator is returned.
**/
void
gtk_text_buffer_get_iter_at_line (GtkTextBuffer *buffer,
GtkTextIter *iter,
int 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: (out): iterator to initialize
* @char_offset: char offset from start of buffer, counting from 0, or -1
*
* Initializes @iter to a position @char_offset chars from the start
* of the entire buffer. If @char_offset is -1 or greater than the number
* of characters in the buffer, @iter is initialized to the end iterator,
* the iterator one past the last valid character in the buffer.
**/
void
gtk_text_buffer_get_iter_at_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
int 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: (out): 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: (out): 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: (out): iterator to initialize with first position in the buffer
* @end: (out): 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.
*
* Returns: %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->priv->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 the #GtkTextBuffer::modified-changed signal.
**/
void
gtk_text_buffer_set_modified (GtkTextBuffer *buffer,
gboolean setting)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
setting = !!setting;
if (buffer->priv->modified != setting)
{
buffer->priv->modified = setting;
gtk_text_history_modified_changed (buffer->priv->history, setting);
g_signal_emit (buffer, signals[MODIFIED_CHANGED], 0);
}
}
/**
* gtk_text_buffer_get_has_selection:
* @buffer: a #GtkTextBuffer
*
* Indicates whether the buffer has some text currently selected.
*
* Returns: %TRUE if the there is text selected
**/
gboolean
gtk_text_buffer_get_has_selection (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return buffer->priv->has_selection;
}
/*
* 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.
*
* Returns: number of lines in the buffer
**/
int
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.
*
* Returns: number of characters in the buffer
**/
int
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));
}
static GtkTextBuffer *
create_clipboard_contents_buffer (GtkTextBuffer *buffer,
GtkTextIter *start_iter,
GtkTextIter *end_iter)
{
GtkTextIter start, end;
GtkTextBuffer *contents;
contents = gtk_text_buffer_new (gtk_text_buffer_get_tag_table (buffer));
gtk_text_buffer_get_iter_at_offset (contents, &start, 0);
gtk_text_buffer_insert_range (contents, &start, start_iter, end_iter);
gtk_text_buffer_get_bounds (contents, &start, &end);
gtk_text_buffer_select_range (contents, &start, &end);
/* Ref the source buffer as long as the clipboard contents buffer
* exists, because it's needed for serializing the contents buffer.
* See http://bugzilla.gnome.org/show_bug.cgi?id=339195
*/
g_object_ref (buffer);
g_object_weak_ref (G_OBJECT (contents), (GWeakNotify) g_object_unref, buffer);
return contents;
}
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, paste_point_override);
}
else
{
gtk_text_buffer_get_iter_at_mark (buffer, &insert_point,
gtk_text_buffer_get_insert (buffer));
}
*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 (request_data->replace_selection)
{
GtkTextIter start, end;
if (gtk_text_buffer_get_selection_bounds (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);
*insert_point = start;
}
}
}
static void
emit_paste_done (GtkTextBuffer *buffer,
GdkClipboard *clipboard)
{
g_signal_emit (buffer, signals[PASTE_DONE], 0, clipboard);
}
static void
free_clipboard_request (ClipboardRequest *request_data)
{
g_object_unref (request_data->buffer);
g_slice_free (ClipboardRequest, request_data);
}
#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 (GdkClipboard *clipboard,
ClipboardRequest *request_data,
GtkTextBuffer *src_buffer,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextIter insert_point;
GtkTextBuffer *buffer = request_data->buffer;
/* We're about to emit a bunch of signals, so be safe */
g_object_ref (src_buffer);
/* Replacing the selection with itself */
if (request_data->replace_selection &&
buffer == src_buffer)
{
/* Clear the paste point if needed */
get_paste_point (buffer, &insert_point, TRUE);
goto done;
}
if (request_data->interactive)
gtk_text_buffer_begin_user_action (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 (buffer,
&insert_point,
start,
end,
request_data->interactive);
}
if (request_data->interactive)
gtk_text_buffer_end_user_action (buffer);
done:
emit_paste_done (buffer, clipboard);
g_object_unref (src_buffer);
free_clipboard_request (request_data);
}
static void
gtk_text_buffer_paste_clipboard_finish (GObject *source,
GAsyncResult *result,
gpointer data)
{
GdkClipboard *clipboard = GDK_CLIPBOARD (source);
ClipboardRequest *request_data = data;
GtkTextBuffer *src_buffer;
GtkTextIter start, end;
const GValue *value;
value = gdk_clipboard_read_value_finish (clipboard, result, NULL);
if (value == NULL)
return;
src_buffer = g_value_get_object (value);
if (gtk_text_buffer_get_selection_bounds (src_buffer, &start, &end))
paste_from_buffer (clipboard, request_data, src_buffer,
&start, &end);
}
typedef struct
{
GdkClipboard *clipboard;
guint ref_count;
} SelectionClipboard;
static void
update_selection_clipboards (GtkTextBuffer *buffer)
{
GtkTextBufferPrivate *priv;
GtkTextIter start;
GtkTextIter end;
GSList *l;
priv = buffer->priv;
if (gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
if (priv->selection_content)
gdk_content_provider_content_changed (priv->selection_content);
else
priv->selection_content = gtk_text_buffer_content_new (buffer);
for (l = priv->selection_clipboards; l; l = l->next)
{
SelectionClipboard *selection_clipboard = l->data;
gdk_clipboard_set_content (selection_clipboard->clipboard, priv->selection_content);
}
}
else
{
if (priv->selection_content)
{
GTK_TEXT_BUFFER_CONTENT (priv->selection_content)->text_buffer = NULL;
for (l = priv->selection_clipboards; l; l = l->next)
{
SelectionClipboard *selection_clipboard = l->data;
GdkClipboard *clipboard = selection_clipboard->clipboard;
if (gdk_clipboard_get_content (clipboard) == priv->selection_content)
gdk_clipboard_set_content (clipboard, NULL);
}
g_clear_object (&priv->selection_content);
}
}
}
static SelectionClipboard *
find_selection_clipboard (GtkTextBuffer *buffer,
GdkClipboard *clipboard)
{
GSList *tmp_list = buffer->priv->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 #GdkClipboard
*
* Adds @clipboard to the list of clipboards in which the selection
* contents of @buffer are available. In most cases, @clipboard will be
* the #GdkClipboard returned by gtk_widget_get_primary_clipboard()
* for a view of @buffer.
**/
void
gtk_text_buffer_add_selection_clipboard (GtkTextBuffer *buffer,
GdkClipboard *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_slice_new (SelectionClipboard);
selection_clipboard->clipboard = clipboard;
selection_clipboard->ref_count = 1;
buffer->priv->selection_clipboards = g_slist_prepend (buffer->priv->selection_clipboards,
selection_clipboard);
}
}
/**
* gtk_text_buffer_remove_selection_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: a #GdkClipboard added to @buffer by
* gtk_text_buffer_add_selection_clipboard()
*
* Removes a #GdkClipboard added with
* gtk_text_buffer_add_selection_clipboard().
**/
void
gtk_text_buffer_remove_selection_clipboard (GtkTextBuffer *buffer,
GdkClipboard *clipboard)
{
GtkTextBufferPrivate *priv;
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);
priv = buffer->priv;
selection_clipboard->ref_count--;
if (selection_clipboard->ref_count == 0)
{
if (priv->selection_content &&
gdk_clipboard_get_content (clipboard) == priv->selection_content)
gdk_clipboard_set_content (clipboard, NULL);
buffer->priv->selection_clipboards = g_slist_remove (buffer->priv->selection_clipboards,
selection_clipboard);
g_slice_free (SelectionClipboard, selection_clipboard);
}
}
static void
remove_all_selection_clipboards (GtkTextBuffer *buffer)
{
GtkTextBufferPrivate *priv = buffer->priv;
GSList *l;
for (l = priv->selection_clipboards; l != NULL; l = l->next)
{
SelectionClipboard *selection_clipboard = l->data;
g_slice_free (SelectionClipboard, selection_clipboard);
}
g_slist_free (priv->selection_clipboards);
priv->selection_clipboards = NULL;
}
/**
* gtk_text_buffer_paste_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: the #GdkClipboard to paste from
* @override_location: (allow-none): location to insert pasted text, or %NULL
* @default_editable: whether the buffer is editable by default
*
* Pastes the contents of a clipboard. If @override_location is %NULL, the
* pasted text will be inserted at the cursor position, or the buffer selection
* will be replaced if the selection is non-empty.
*
* 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,
GdkClipboard *clipboard,
GtkTextIter *override_location,
gboolean default_editable)
{
ClipboardRequest *data = g_slice_new (ClipboardRequest);
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 = g_object_ref (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
* occurred, 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;
gdk_clipboard_read_value_async (clipboard,
GTK_TYPE_TEXT_BUFFER,
G_PRIORITY_DEFAULT,
NULL,
gtk_text_buffer_paste_clipboard_finish,
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).
*
* Returns: 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_delete_interactive (buffer, &start, &end, default_editable);
else
gtk_text_buffer_delete (buffer, &start, &end);
return TRUE; /* We deleted stuff */
}
}
/**
* gtk_text_buffer_backspace:
* @buffer: a #GtkTextBuffer
* @iter: a position in @buffer
* @interactive: whether the deletion is caused by user interaction
* @default_editable: whether the buffer is editable by default
*
* Performs the appropriate action as if the user hit the delete
* key with the cursor at the position specified by @iter. In the
* normal case a single character will be deleted, but when
* combining accents are involved, more than one character can
* be deleted, and when precomposed character and accent combinations
* are involved, less than one character will be deleted.
*
* Because the buffer is modified, all outstanding iterators become
* invalid after calling this function; however, the @iter will be
* re-initialized to point to the location where text was deleted.
*
* Returns: %TRUE if the buffer was modified
**/
gboolean
gtk_text_buffer_backspace (GtkTextBuffer *buffer,
GtkTextIter *iter,
gboolean interactive,
gboolean default_editable)
{
char *cluster_text;
GtkTextIter start;
GtkTextIter end;
gboolean retval = FALSE;
const PangoLogAttr *attrs;
int offset;
gboolean backspace_deletes_character;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
g_return_val_if_fail (iter != NULL, FALSE);
start = *iter;
end = *iter;
attrs = _gtk_text_buffer_get_line_log_attrs (buffer, &start, NULL);
offset = gtk_text_iter_get_line_offset (&start);
backspace_deletes_character = attrs[offset].backspace_deletes_character;
gtk_text_iter_backward_cursor_position (&start);
if (gtk_text_iter_equal (&start, &end))
return FALSE;
cluster_text = gtk_text_iter_get_text (&start, &end);
if (interactive)
gtk_text_buffer_begin_user_action (buffer);
if (gtk_text_buffer_delete_interactive (buffer, &start, &end,
default_editable))
{
/* special case \r\n, since we never want to reinsert \r */
if (backspace_deletes_character && strcmp ("\r\n", cluster_text))
{
char *normalized_text = g_utf8_normalize (cluster_text,
strlen (cluster_text),
G_NORMALIZE_NFD);
glong len = g_utf8_strlen (normalized_text, -1);
if (len > 1)
gtk_text_buffer_insert_interactive (buffer,
&start,
normalized_text,
g_utf8_offset_to_pointer (normalized_text, len - 1) - normalized_text,
default_editable);
g_free (normalized_text);
}
retval = TRUE;
}
if (interactive)
gtk_text_buffer_end_user_action (buffer);
g_free (cluster_text);
/* Revalidate the users iter */
*iter = start;
return retval;
}
static void
cut_or_copy (GtkTextBuffer *buffer,
GdkClipboard *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))
{
GtkTextBuffer *contents;
contents = create_clipboard_contents_buffer (buffer, &start, &end);
gdk_clipboard_set (clipboard, GTK_TYPE_TEXT_BUFFER, contents);
g_object_unref (contents);
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_get_selection_content:
* @buffer: a #GtkTextBuffer
*
* Get a content provider for this buffer.
*
* Returns: (transfer full): a new #GdkContentProvider.
**/
GdkContentProvider *
gtk_text_buffer_get_selection_content (GtkTextBuffer *buffer)
{
return gtk_text_buffer_content_new (buffer);
}
/**
* gtk_text_buffer_cut_clipboard:
* @buffer: a #GtkTextBuffer
* @clipboard: the #GdkClipboard 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,
GdkClipboard *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 #GdkClipboard object to copy to
*
* Copies the currently-selected text to a clipboard.
**/
void
gtk_text_buffer_copy_clipboard (GtkTextBuffer *buffer,
GdkClipboard *clipboard)
{
cut_or_copy (buffer, clipboard, FALSE, TRUE, TRUE);
}
/**
* gtk_text_buffer_get_selection_bounds:
* @buffer: a #GtkTextBuffer a #GtkTextBuffer
* @start: (out): iterator to initialize with selection start
* @end: (out): 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.
*
* Returns: 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->priv->user_action_count += 1;
if (buffer->priv->user_action_count == 1)
{
/* Outermost nested user action begin emits the signal */
g_signal_emit (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->priv->user_action_count > 0);
buffer->priv->user_action_count -= 1;
if (buffer->priv->user_action_count == 0)
{
/* Ended the outermost-nested user action end, so emit the signal */
g_signal_emit (buffer, signals[END_USER_ACTION], 0);
}
}
/*
* Logical attribute cache
*/
#define ATTR_CACHE_SIZE 2
typedef struct _CacheEntry CacheEntry;
struct _CacheEntry
{
int line;
int char_len;
PangoLogAttr *attrs;
};
struct _GtkTextLogAttrCache
{
int chars_changed_stamp;
CacheEntry entries[ATTR_CACHE_SIZE];
};
static void
free_log_attr_cache (GtkTextLogAttrCache *cache)
{
int i;
for (i = 0; i < ATTR_CACHE_SIZE; i++)
g_free (cache->entries[i].attrs);
g_slice_free (GtkTextLogAttrCache, cache);
}
static void
clear_log_attr_cache (GtkTextLogAttrCache *cache)
{
int i;
for (i = 0; i < ATTR_CACHE_SIZE; i++)
{
g_free (cache->entries[i].attrs);
cache->entries[i].attrs = NULL;
}
}
static PangoLogAttr*
compute_log_attrs (const GtkTextIter *iter,
int *char_lenp)
{
GtkTextIter start;
GtkTextIter end;
char *paragraph;
int 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);
if (char_lenp != NULL)
*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.
* Returns (char_len + 1) PangoLogAttr's, one for each text position.
*/
const PangoLogAttr *
_gtk_text_buffer_get_line_log_attrs (GtkTextBuffer *buffer,
const GtkTextIter *anywhere_in_line,
int *char_len)
{
GtkTextBufferPrivate *priv;
int line;
GtkTextLogAttrCache *cache;
int i;
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (anywhere_in_line != NULL, NULL);
priv = buffer->priv;
/* FIXME we also need to recompute log attrs if the language tag at
* the start of a paragraph changes
*/
if (priv->log_attr_cache == NULL)
{
priv->log_attr_cache = g_slice_new0 (GtkTextLogAttrCache);
priv->log_attr_cache->chars_changed_stamp =
_gtk_text_btree_get_chars_changed_stamp (get_btree (buffer));
}
else if (priv->log_attr_cache->chars_changed_stamp !=
_gtk_text_btree_get_chars_changed_stamp (get_btree (buffer)))
{
clear_log_attr_cache (priv->log_attr_cache);
}
cache = priv->log_attr_cache;
line = gtk_text_iter_get_line (anywhere_in_line);
for (i = 0; i < ATTR_CACHE_SIZE; i++)
{
if (cache->entries[i].attrs != NULL &&
cache->entries[i].line == line)
{
if (char_len != NULL)
*char_len = cache->entries[i].char_len;
return cache->entries[i].attrs;
}
}
/* Not in cache; open up the first cache entry */
g_free (cache->entries[ATTR_CACHE_SIZE-1].attrs);
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 != NULL)
*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->priv->btree)
_gtk_text_btree_notify_will_remove_tag (buffer->priv->btree, tag);
}
/*
* Debug spew
*/
void
_gtk_text_buffer_spew (GtkTextBuffer *buffer)
{
_gtk_text_btree_spew (get_btree (buffer));
}
static void
insert_tags_for_attributes (GtkTextBuffer *buffer,
PangoAttrIterator *iter,
GtkTextIter *start,
GtkTextIter *end)
{
GtkTextTagTable *table;
GSList *attrs, *l;
GtkTextTag *tag;
char name[256];
float fg_alpha, bg_alpha;
table = gtk_text_buffer_get_tag_table (buffer);
#define LANGUAGE_ATTR(attr_name) \
{ \
const char *language = pango_language_to_string (((PangoAttrLanguage*)attr)->value); \
g_snprintf (name, 256, "language=%s", language); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, language, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define STRING_ATTR(attr_name) \
{ \
const char *string = ((PangoAttrString*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%s", string); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, string, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define INT_ATTR(attr_name) \
{ \
int value = ((PangoAttrInt*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%d", value); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, value, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define FONT_ATTR(attr_name) \
{ \
PangoFontDescription *desc = ((PangoAttrFontDesc*)attr)->desc; \
char *str = pango_font_description_to_string (desc); \
g_snprintf (name, 256, "font-desc=%s", str); \
g_free (str); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, desc, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define FLOAT_ATTR(attr_name) \
{ \
float value = ((PangoAttrFloat*)attr)->value; \
g_snprintf (name, 256, #attr_name "=%g", value); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, value, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
#define RGBA_ATTR(attr_name, alpha_value) \
{ \
PangoColor *color; \
GdkRGBA rgba; \
color = &((PangoAttrColor*)attr)->color; \
rgba.red = color->red / 65535.; \
rgba.green = color->green / 65535.; \
rgba.blue = color->blue / 65535.; \
rgba.alpha = alpha_value; \
char *str = gdk_rgba_to_string (&rgba); \
g_snprintf (name, 256, #attr_name "=%s", str); \
g_free (str); \
tag = gtk_text_tag_table_lookup (table, name); \
if (!tag) \
{ \
tag = gtk_text_tag_new (name); \
g_object_set (tag, #attr_name, &rgba, NULL); \
gtk_text_tag_table_add (table, tag); \
g_object_unref (tag); \
} \
gtk_text_buffer_apply_tag (buffer, tag, start, end); \
}
fg_alpha = bg_alpha = 1.;
attrs = pango_attr_iterator_get_attrs (iter);
for (l = attrs; l; l = l->next)
{
PangoAttribute *attr = l->data;
switch ((int)attr->klass->type)
{
case PANGO_ATTR_FOREGROUND_ALPHA:
fg_alpha = ((PangoAttrInt*)attr)->value / 65535.;
break;
case PANGO_ATTR_BACKGROUND_ALPHA:
bg_alpha = ((PangoAttrInt*)attr)->value / 65535.;
break;
default:
break;
}
}
for (l = attrs; l; l = l->next)
{
PangoAttribute *attr = l->data;
switch (attr->klass->type)
{
case PANGO_ATTR_LANGUAGE:
LANGUAGE_ATTR (language);
break;
case PANGO_ATTR_FAMILY:
STRING_ATTR (family);
break;
case PANGO_ATTR_STYLE:
INT_ATTR (style);
break;
case PANGO_ATTR_WEIGHT:
INT_ATTR (weight);
break;
case PANGO_ATTR_VARIANT:
INT_ATTR (variant);
break;
case PANGO_ATTR_STRETCH:
INT_ATTR (stretch);
break;
case PANGO_ATTR_SIZE:
INT_ATTR (size);
break;
case PANGO_ATTR_FONT_DESC:
FONT_ATTR (font-desc);
break;
case PANGO_ATTR_FOREGROUND:
RGBA_ATTR (foreground_rgba, fg_alpha);
break;
case PANGO_ATTR_BACKGROUND:
RGBA_ATTR (background_rgba, bg_alpha);
break;
case PANGO_ATTR_UNDERLINE:
INT_ATTR (underline);
break;
case PANGO_ATTR_UNDERLINE_COLOR:
RGBA_ATTR (underline_rgba, fg_alpha);
break;
case PANGO_ATTR_OVERLINE:
INT_ATTR (overline);
break;
case PANGO_ATTR_OVERLINE_COLOR:
RGBA_ATTR (overline_rgba, fg_alpha);
break;
case PANGO_ATTR_STRIKETHROUGH:
INT_ATTR (strikethrough);
break;
case PANGO_ATTR_STRIKETHROUGH_COLOR:
RGBA_ATTR (strikethrough_rgba, fg_alpha);
break;
case PANGO_ATTR_RISE:
INT_ATTR (rise);
break;
case PANGO_ATTR_SCALE:
FLOAT_ATTR (scale);
break;
case PANGO_ATTR_FALLBACK:
INT_ATTR (fallback);
break;
case PANGO_ATTR_LETTER_SPACING:
INT_ATTR (letter_spacing);
break;
case PANGO_ATTR_FONT_FEATURES:
STRING_ATTR (font_features);
break;
case PANGO_ATTR_ALLOW_BREAKS:
INT_ATTR (allow_breaks);
break;
case PANGO_ATTR_SHOW:
INT_ATTR (show_spaces);
break;
case PANGO_ATTR_INSERT_HYPHENS:
INT_ATTR (insert_hyphens);
break;
case PANGO_ATTR_SHAPE:
case PANGO_ATTR_ABSOLUTE_SIZE:
case PANGO_ATTR_GRAVITY:
case PANGO_ATTR_GRAVITY_HINT:
case PANGO_ATTR_FOREGROUND_ALPHA:
case PANGO_ATTR_BACKGROUND_ALPHA:
break;
case PANGO_ATTR_INVALID:
default:
g_assert_not_reached ();
break;
}
}
g_slist_free_full (attrs, (GDestroyNotify)pango_attribute_destroy);
#undef LANGUAGE_ATTR
#undef STRING_ATTR
#undef INT_ATTR
#undef FONT_ATTR
#undef FLOAT_ATTR
#undef RGBA_ATTR
}
static void
gtk_text_buffer_insert_with_attributes (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *text,
PangoAttrList *attributes)
{
GtkTextMark *mark;
PangoAttrIterator *attr;
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (!attributes)
{
gtk_text_buffer_insert (buffer, iter, text, -1);
return;
}
/* create mark with right gravity */
mark = gtk_text_buffer_create_mark (buffer, NULL, iter, FALSE);
attr = pango_attr_list_get_iterator (attributes);
do
{
int start, end;
int start_offset;
GtkTextIter start_iter;
pango_attr_iterator_range (attr, &start, &end);
if (end == G_MAXINT) /* last chunk */
end = start - 1; /* resulting in -1 to be passed to _insert */
start_offset = gtk_text_iter_get_offset (iter);
gtk_text_buffer_insert (buffer, iter, text + start, end - start);
gtk_text_buffer_get_iter_at_offset (buffer, &start_iter, start_offset);
insert_tags_for_attributes (buffer, attr, &start_iter, iter);
gtk_text_buffer_get_iter_at_mark (buffer, iter, mark);
}
while (pango_attr_iterator_next (attr));
gtk_text_buffer_delete_mark (buffer, mark);
pango_attr_iterator_destroy (attr);
}
/**
* gtk_text_buffer_insert_markup:
* @buffer: a #GtkTextBuffer
* @iter: location to insert the markup
* @markup: a nul-terminated UTF-8 string containing [Pango markup][PangoMarkupFormat]
* @len: length of @markup in bytes, or -1
*
* Inserts the text in @markup at position @iter. @markup will be inserted
* in its entirety and must be nul-terminated and valid UTF-8. Emits the
* #GtkTextBuffer::insert-text signal, possibly multiple times; insertion
* actually occurs in the default handler for the signal. @iter will point
* to the end of the inserted text on return.
*/
void
gtk_text_buffer_insert_markup (GtkTextBuffer *buffer,
GtkTextIter *iter,
const char *markup,
int len)
{
PangoAttrList *attributes;
char *text;
GError *error = NULL;
if (!pango_parse_markup (markup, len, 0, &attributes, &text, NULL, &error))
{
g_warning ("Invalid markup string: %s", error->message);
g_error_free (error);
return;
}
gtk_text_buffer_insert_with_attributes (buffer, iter, text, attributes);
pango_attr_list_unref (attributes);
g_free (text);
}
static void
gtk_text_buffer_real_undo (GtkTextBuffer *buffer)
{
if (gtk_text_history_get_can_undo (buffer->priv->history))
gtk_text_history_undo (buffer->priv->history);
}
static void
gtk_text_buffer_real_redo (GtkTextBuffer *buffer)
{
if (gtk_text_history_get_can_redo (buffer->priv->history))
gtk_text_history_redo (buffer->priv->history);
}
/**
* gtk_text_buffer_get_can_undo:
* @buffer: a #GtkTextBuffer
*
* Gets whether there is an undoable action in the history.
*
* Returns: %TRUE if there is an undoable action
*/
gboolean
gtk_text_buffer_get_can_undo (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return gtk_text_history_get_can_undo (buffer->priv->history);
}
/**
* gtk_text_buffer_get_can_redo:
* @buffer: a #GtkTextBuffer
*
* Gets whether there is a redoable action in the history.
*
* Returns: %TRUE if there is an redoable action
*/
gboolean
gtk_text_buffer_get_can_redo (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return gtk_text_history_get_can_redo (buffer->priv->history);
}
static void
gtk_text_buffer_history_change_state (gpointer funcs_data,
gboolean is_modified,
gboolean can_undo,
gboolean can_redo)
{
GtkTextBuffer *buffer = funcs_data;
if (buffer->priv->can_undo != can_undo)
{
buffer->priv->can_undo = can_undo;
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_CAN_UNDO]);
}
if (buffer->priv->can_redo != can_redo)
{
buffer->priv->can_redo = can_redo;
g_object_notify_by_pspec (G_OBJECT (buffer), text_buffer_props[PROP_CAN_REDO]);
}
if (buffer->priv->modified != is_modified)
gtk_text_buffer_set_modified (buffer, is_modified);
}
static void
gtk_text_buffer_history_insert (gpointer funcs_data,
guint begin,
guint end,
const char *text,
guint len)
{
GtkTextBuffer *buffer = funcs_data;
GtkTextIter iter;
gtk_text_buffer_get_iter_at_offset (buffer, &iter, begin);
gtk_text_buffer_insert (buffer, &iter, text, len);
}
static void
gtk_text_buffer_history_delete (gpointer funcs_data,
guint begin,
guint end,
const char *expected_text,
guint len)
{
GtkTextBuffer *buffer = funcs_data;
GtkTextIter iter;
GtkTextIter end_iter;
gtk_text_buffer_get_iter_at_offset (buffer, &iter, begin);
gtk_text_buffer_get_iter_at_offset (buffer, &end_iter, end);
gtk_text_buffer_delete (buffer, &iter, &end_iter);
}
static void
gtk_text_buffer_history_select (gpointer funcs_data,
int selection_insert,
int selection_bound)
{
GtkTextBuffer *buffer = funcs_data;
GtkTextIter insert;
GtkTextIter bound;
if (selection_insert == -1 || selection_bound == -1)
return;
gtk_text_buffer_get_iter_at_offset (buffer, &insert, selection_insert);
gtk_text_buffer_get_iter_at_offset (buffer, &bound, selection_bound);
gtk_text_buffer_select_range (buffer, &insert, &bound);
}
/**
* gtk_text_buffer_undo:
* @buffer: a #GtkTextBuffer
*
* Undoes the last undoable action on the buffer, if there is one.
*/
void
gtk_text_buffer_undo (GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (gtk_text_buffer_get_can_undo (buffer))
g_signal_emit (buffer, signals[UNDO], 0);
}
/**
* gtk_text_buffer_redo:
* @buffer: a #GtkTextBuffer
*
* Redoes the next redoable action on the buffer, if there is one.
*/
void
gtk_text_buffer_redo (GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (gtk_text_buffer_get_can_redo (buffer))
g_signal_emit (buffer, signals[REDO], 0);
}
/**
* gtk_text_buffer_get_enable_undo:
* @buffer: a #GtkTextBuffer
*
* Gets whether the buffer is saving modifications to the buffer to allow for
* undo and redo actions.
*
* See gtk_text_buffer_begin_irreversible_action() and
* gtk_text_buffer_end_irreversible_action() to create changes to the buffer
* that cannot be undone.
*/
gboolean
gtk_text_buffer_get_enable_undo (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return gtk_text_history_get_enabled (buffer->priv->history);
}
/**
* gtk_text_buffer_set_enable_undo:
* @buffer: a #GtkTextBuffer
* @enable_undo: %TRUE to enable undo
*
* Sets whether or not to enable undoable actions in the text buffer. If
* enabled, the user will be able to undo the last number of actions up to
* gtk_text_buffer_get_max_undo_levels().
*
* See gtk_text_buffer_begin_irreversible_action() and
* gtk_text_buffer_end_irreversible_action() to create changes to the buffer
* that cannot be undone.
*/
void
gtk_text_buffer_set_enable_undo (GtkTextBuffer *buffer,
gboolean enable_undo)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
if (enable_undo != gtk_text_history_get_enabled (buffer->priv->history))
{
gtk_text_history_set_enabled (buffer->priv->history, enable_undo);
g_object_notify_by_pspec (G_OBJECT (buffer),
text_buffer_props[PROP_ENABLE_UNDO]);
}
}
/**
* gtk_text_buffer_begin_irreversible_action:
* @buffer: a #GtkTextBuffer
*
* Denotes the beginning of an action that may not be undone. This will cause
* any previous operations in the undo/redo queue to be cleared.
*
* This should be paired with a call to
* gtk_text_buffer_end_irreversible_action() after the irreversible action
* has completed.
*
* You may nest calls to gtk_text_buffer_begin_irreversible_action() and
* gtk_text_buffer_end_irreversible_action() pairs.
*/
void
gtk_text_buffer_begin_irreversible_action (GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
gtk_text_history_begin_irreversible_action (buffer->priv->history);
}
/**
* gtk_text_buffer_end_irreversible_action:
* @buffer: a #GtkTextBuffer
*
* Denotes the end of an action that may not be undone. This will cause
* any previous operations in the undo/redo queue to be cleared.
*
* This should be called after completing modifications to the text buffer
* after gtk_text_buffer_begin_irreversible_action() was called.
*
* You may nest calls to gtk_text_buffer_begin_irreversible_action() and
* gtk_text_buffer_end_irreversible_action() pairs.
*/
void
gtk_text_buffer_end_irreversible_action (GtkTextBuffer *buffer)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
gtk_text_history_end_irreversible_action (buffer->priv->history);
}
/**
* gtk_text_buffer_get_max_undo_levels:
* @buffer: a #GtkTextBuffer
*
* Gets the maximum number of undo levels to perform. If 0, unlimited undo
* actions may be performed. Note that this may have a memory usage impact
* as it requires storing an additional copy of the inserted or removed text
* within the text buffer.
*/
guint
gtk_text_buffer_get_max_undo_levels (GtkTextBuffer *buffer)
{
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), 0);
return gtk_text_history_get_max_undo_levels (buffer->priv->history);
}
/**
* gtk_text_buffer_set_max_undo_levels:
* @buffer: a #GtkTextBuffer
* @max_undo_levels: the maximum number of undo actions to perform
*
* Sets the maximum number of undo levels to perform. If 0, unlimited undo
* actions may be performed. Note that this may have a memory usage impact
* as it requires storing an additional copy of the inserted or removed text
* within the text buffer.
*/
void
gtk_text_buffer_set_max_undo_levels (GtkTextBuffer *buffer,
guint max_undo_levels)
{
g_return_if_fail (GTK_IS_TEXT_BUFFER (buffer));
gtk_text_history_set_max_undo_levels (buffer->priv->history, max_undo_levels);
}
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