/* 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 .
*/
/*
* 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
#include
#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;
char *data;
written = g_output_stream_splice_finish (stream, result, &error);
if (written < 0)
{
gdk_content_deserializer_return_error (deserializer, error);
return;
}
data = g_memory_output_stream_steal_data (G_MEMORY_OUTPUT_STREAM (
g_filter_output_stream_get_base_stream (G_FILTER_OUTPUT_STREAM (stream))));
if (data)
{
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, data, -1);
gtk_text_buffer_get_bounds (buffer, &start, &end);
gtk_text_buffer_select_range (buffer, &start, &end);
g_free (data);
}
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.
*
* Returns: whether the exact position has been found
**/
gboolean
gtk_text_buffer_get_iter_at_line_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
int line_number,
int char_offset)
{
GtkTextIter end_line_iter;
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
if (line_number >= gtk_text_buffer_get_line_count (buffer))
{
gtk_text_buffer_get_end_iter (buffer, iter);
return FALSE;
}
_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))
{
*iter = end_line_iter;
return FALSE;
}
gtk_text_iter_set_line_offset (iter, char_offset);
return TRUE;
}
/**
* 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.
*
* Returns: whether the exact position has been found
**/
gboolean
gtk_text_buffer_get_iter_at_line_index (GtkTextBuffer *buffer,
GtkTextIter *iter,
int line_number,
int byte_index)
{
GtkTextIter end_line_iter;
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
if (line_number >= gtk_text_buffer_get_line_count (buffer))
{
gtk_text_buffer_get_end_iter (buffer, iter);
return FALSE;
}
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))
{
*iter = end_line_iter;
return FALSE;
}
gtk_text_iter_set_line_index (iter, byte_index);
return TRUE;
}
/**
* 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.
*
* Returns: whether the exact position has been found
*/
gboolean
gtk_text_buffer_get_iter_at_line (GtkTextBuffer *buffer,
GtkTextIter *iter,
int line_number)
{
g_return_val_if_fail (iter != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return 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. It can be
* used to make the content of @buffer available in a
* #GdkClipboard, see gdk_clipboard_set_content().
*
* 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);
}