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gtk2/gtk/gtktextbuffer.c
Havoc Pennington 9bec105a66 Draw the focus, and leave space to do so. 
2000-09-25  Havoc Pennington  <hp@redhat.com>

	* gtk/gtktextview.c: Draw the focus, and leave space to do so.

	* gtk/gtktexttypes.c: Remove Latin1 conversion stuff

	* gtk/gtktextbtree.c (gtk_text_btree_node_remove_data):
	Fix a bug when removing node data, we didn't properly
	re-splice the linked list after removing the data.

	* gtk/gtktextview.c (gtk_text_view_key_press_event): Pass through
	GDK_Tab as literal tab, Ctrl-Tab to tab to focus widget

	* gtk/gtktextbuffer.c (selection_received): fix g_convert usage

	* gtk/gtktextlayout.c (set_para_values): Set tab array
	for the layout from the GtkTextTag.

	* gtk/gtktexttypes.h: delete tab and search cruft,
	remove g_convert() in favor of GLib version

	* gtk/gtktexttypes.c: remove tab implementation from here,
	move to Pango

	* gtk/gtktexttag.h, gtk/gtktexttag.c: Implement
	tab stuff using new PangoTabArray from Pango

	* gtk/gtktexttag.c (gtk_text_attributes_fill_from_tags): Remove
	unused border_width stuff
2000-09-25 17:17:13 +00:00

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/* gtktextbuffer.c - the "model" in the MVC text widget architecture
* Copyright (c) 2000 Red Hat, Inc.
* Developed by Havoc Pennington
*/
#include <string.h>
#include "gtkclipboard.h"
#include "gtkinvisible.h"
#include "gtksignal.h"
#include "gtktextbuffer.h"
#include "gtktextbtree.h"
#include "gtktextiterprivate.h"
#include <string.h>
typedef struct _ClipboardRequest ClipboardRequest;
struct _ClipboardRequest
{
GtkTextBuffer *buffer;
gboolean interactive;
gboolean default_editable;
gboolean is_clipboard;
};
enum {
INSERT_TEXT,
DELETE_TEXT,
CHANGED,
MODIFIED_CHANGED,
MARK_SET,
MARK_DELETED,
APPLY_TAG,
REMOVE_TAG,
LAST_SIGNAL
};
enum {
ARG_0,
LAST_ARG
};
enum {
TARGET_STRING,
TARGET_TEXT,
TARGET_COMPOUND_TEXT,
TARGET_UTF8_STRING
};
static void gtk_text_buffer_init (GtkTextBuffer *tkxt_buffer);
static void gtk_text_buffer_class_init (GtkTextBufferClass *klass);
static void gtk_text_buffer_destroy (GtkObject *object);
static void gtk_text_buffer_finalize (GObject *object);
static void gtk_text_buffer_update_primary_selection (GtkTextBuffer *buffer);
static void gtk_text_buffer_real_insert_text (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
gboolean interactive);
static void gtk_text_buffer_real_delete_text (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end,
gboolean interactive);
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 GtkTextBTree* get_btree (GtkTextBuffer *buffer);
void gtk_marshal_NONE__INT_POINTER_INT (GtkObject *object,
GtkSignalFunc func,
gpointer func_data,
GtkArg *args);
static GtkObjectClass *parent_class = NULL;
static guint signals[LAST_SIGNAL] = { 0 };
GtkType
gtk_text_buffer_get_type (void)
{
static GtkType our_type = 0;
if (our_type == 0)
{
static const GtkTypeInfo our_info =
{
"GtkTextBuffer",
sizeof (GtkTextBuffer),
sizeof (GtkTextBufferClass),
(GtkClassInitFunc) gtk_text_buffer_class_init,
(GtkObjectInitFunc) gtk_text_buffer_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL
};
our_type = gtk_type_unique (GTK_TYPE_OBJECT, &our_info);
}
return our_type;
}
static void
gtk_text_buffer_class_init (GtkTextBufferClass *klass)
{
GtkObjectClass *object_class = (GtkObjectClass*) klass;
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
parent_class = gtk_type_class (GTK_TYPE_OBJECT);
signals[INSERT_TEXT] =
gtk_signal_new ("insert_text",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, insert_text),
gtk_marshal_NONE__POINTER_POINTER_INT_INT,
GTK_TYPE_NONE,
4,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER,
GTK_TYPE_INT,
GTK_TYPE_BOOL);
signals[DELETE_TEXT] =
gtk_signal_new ("delete_text",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, delete_text),
gtk_marshal_NONE__POINTER_POINTER_INT,
GTK_TYPE_NONE,
3,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER,
GTK_TYPE_BOOL);
signals[CHANGED] =
gtk_signal_new ("changed",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE,
0);
signals[MODIFIED_CHANGED] =
gtk_signal_new ("modified_changed",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, modified_changed),
gtk_marshal_NONE__NONE,
GTK_TYPE_NONE,
0);
signals[MARK_SET] =
gtk_signal_new ("mark_set",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, mark_set),
gtk_marshal_NONE__POINTER_POINTER,
GTK_TYPE_NONE,
2,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER);
signals[MARK_DELETED] =
gtk_signal_new ("mark_deleted",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, mark_deleted),
gtk_marshal_NONE__POINTER,
GTK_TYPE_NONE,
1,
GTK_TYPE_POINTER);
signals[APPLY_TAG] =
gtk_signal_new ("apply_tag",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, apply_tag),
gtk_marshal_NONE__POINTER_POINTER_POINTER,
GTK_TYPE_NONE,
3,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER);
signals[REMOVE_TAG] =
gtk_signal_new ("remove_tag",
GTK_RUN_LAST,
GTK_CLASS_TYPE (object_class),
GTK_SIGNAL_OFFSET (GtkTextBufferClass, remove_tag),
gtk_marshal_NONE__POINTER_POINTER_POINTER,
GTK_TYPE_NONE,
3,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER,
GTK_TYPE_POINTER);
gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
object_class->destroy = gtk_text_buffer_destroy;
gobject_class->finalize = gtk_text_buffer_finalize;
klass->insert_text = gtk_text_buffer_real_insert_text;
klass->delete_text = gtk_text_buffer_real_delete_text;
klass->apply_tag = gtk_text_buffer_real_apply_tag;
klass->remove_tag = gtk_text_buffer_real_remove_tag;
}
typedef gint (*GtkSignal_NONE__INT_POINTER_INT) (GtkObject *object,
gint pos,
const gchar *text,
gint len,
gpointer user_data);
void
gtk_marshal_NONE__INT_POINTER_INT (GtkObject *object,
GtkSignalFunc func,
gpointer func_data,
GtkArg *args)
{
GtkSignal_NONE__INT_POINTER_INT rfunc;
rfunc = (GtkSignal_NONE__INT_POINTER_INT) func;
(*rfunc) (object,
GTK_VALUE_INT (args[0]),
GTK_VALUE_POINTER (args[1]),
GTK_VALUE_INT (args[2]),
func_data);
}
void
gtk_text_buffer_init (GtkTextBuffer *buffer)
{
}
/**
* gtk_text_buffer_new:
* @table: a tag table, or NULL to create a new one
*
* Creates a new text buffer.
*
* Return value: a new text buffer
**/
GtkTextBuffer*
gtk_text_buffer_new (GtkTextTagTable *table)
{
GtkTextBuffer *text_buffer;
text_buffer = GTK_TEXT_BUFFER (gtk_type_new (gtk_text_buffer_get_type ()));
if (table)
{
text_buffer->tag_table = table;
gtk_object_ref (GTK_OBJECT(text_buffer->tag_table));
gtk_object_sink (GTK_OBJECT(text_buffer->tag_table));
}
return text_buffer;
}
static void
gtk_text_buffer_destroy (GtkObject *object)
{
GtkTextBuffer *buffer;
buffer = GTK_TEXT_BUFFER (object);
if (buffer->tag_table)
{
gtk_object_unref(GTK_OBJECT(buffer->tag_table));
buffer->tag_table = NULL;
}
if (buffer->btree)
{
gtk_text_btree_unref(buffer->btree);
buffer->btree = NULL;
}
(* parent_class->destroy) (object);
}
static void
gtk_text_buffer_finalize (GObject *object)
{
GtkTextBuffer *tkxt_buffer;
tkxt_buffer = GTK_TEXT_BUFFER (object);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GtkTextTagTable*
get_table (GtkTextBuffer *buffer)
{
if (buffer->tag_table == NULL)
{
buffer->tag_table = gtk_text_tag_table_new ();
gtk_object_ref (GTK_OBJECT(buffer->tag_table));
gtk_object_sink (GTK_OBJECT(buffer->tag_table));
}
return buffer->tag_table;
}
static GtkTextBTree*
get_btree (GtkTextBuffer *buffer)
{
if (buffer->btree == NULL)
buffer->btree = gtk_text_btree_new(gtk_text_buffer_get_tag_table (buffer),
buffer);
return buffer->btree;
}
GtkTextBTree*
_gtk_text_buffer_get_btree (GtkTextBuffer *buffer)
{
return get_btree (buffer);
}
/**
* gtk_text_buffer_get_tag_table:
* @buffer: a #GtkTextBuffer
*
* Get the #GtkTextTagTable associated with this buffer.
*
* Return value: the buffer's tag table
**/
GtkTextTagTable*
gtk_text_buffer_get_tag_table (GtkTextBuffer *buffer)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), NULL);
return get_table (buffer);
}
/*
* Insertion
*/
static void
gtk_text_buffer_real_insert_text(GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
gboolean interactive)
{
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(iter != NULL);
gtk_text_btree_insert(iter, text, len);
gtk_signal_emit(GTK_OBJECT(buffer), signals[CHANGED]);
gtk_text_buffer_set_modified(buffer, TRUE);
}
static void
gtk_text_buffer_emit_insert(GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
gboolean interactive)
{
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);
if (len > 0)
{
gtk_signal_emit(GTK_OBJECT(buffer), signals[INSERT_TEXT],
iter, text, len, interactive);
}
}
/**
* gtk_text_buffer_insert:
* @buffer: a #GtkTextBuffer
* @iter: a position in the buffer
* @text: UTF-8 format text to insert
* @len: length of text in bytes, or -1
*
* Inserts @len bytes of @text at position @iter. If @len is -1,
* @text must be nul-terminated and will be inserted in its
* entirety. Emits the "insert_text" signal; insertion actually occurs
* in the default handler for the signal. @iter is invalidated when
* insertion occurs (because the buffer contents change), but the
* default signal handler revalidates it to point to the end of the
* inserted text.
*
**/
void
gtk_text_buffer_insert (GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len)
{
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(iter != NULL);
g_return_if_fail(text != NULL);
gtk_text_buffer_emit_insert(buffer, iter, text, len, FALSE);
}
/**
* gtk_text_buffer_insert_at_cursor:
* @buffer: a #GtkTextBuffer
* @text: some text in UTF-8 format
* @len: length of text, in bytes
*
* Simply calls gtk_text_buffer_insert(), using the current
* cursor position as the insertion point.
**/
void
gtk_text_buffer_insert_at_cursor (GtkTextBuffer *buffer,
const gchar *text,
gint len)
{
GtkTextIter iter;
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(text != NULL);
gtk_text_buffer_get_iter_at_mark(buffer, &iter,
gtk_text_buffer_get_mark (buffer,
"insert"));
gtk_text_buffer_insert(buffer, &iter, text, len);
}
/**
* gtk_text_buffer_insert_interactive:
* @buffer: a #GtkTextBuffer
* @iter: a position in @buffer
* @text: some UTF-8 text
* @len: length of text in bytes, or -1
* @default_editable: default editability of buffer
*
* Like gtk_text_buffer_insert(), but the insertion will not occur if
* @iter is at a non-editable location in the buffer. Usually you
* want to prevent insertions at ineditable locations if the insertion
* results from a user action (is interactive).
*
* Return value: whether text was actually inserted
**/
gboolean
gtk_text_buffer_insert_interactive(GtkTextBuffer *buffer,
GtkTextIter *iter,
const gchar *text,
gint len,
gboolean default_editable)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), FALSE);
g_return_val_if_fail(text != NULL, FALSE);
if (gtk_text_iter_editable (iter, default_editable))
{
gtk_text_buffer_emit_insert (buffer, iter, text, len, TRUE);
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.
*
* Return value: whether text was actually inserted
**/
gboolean
gtk_text_buffer_insert_interactive_at_cursor (GtkTextBuffer *buffer,
const gchar *text,
gint len,
gboolean default_editable)
{
GtkTextIter iter;
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), FALSE);
g_return_val_if_fail(text != NULL, FALSE);
gtk_text_buffer_get_iter_at_mark(buffer, &iter,
gtk_text_buffer_get_mark (buffer,
"insert"));
return gtk_text_buffer_insert_interactive (buffer, &iter, text, len,
default_editable);
}
/*
* Deletion
*/
static void
gtk_text_buffer_real_delete_text(GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end,
gboolean interactive)
{
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(start != NULL);
g_return_if_fail(end != NULL);
gtk_text_btree_delete(start, end);
/* may have deleted the selection... */
gtk_text_buffer_update_primary_selection(buffer);
gtk_signal_emit(GTK_OBJECT(buffer), signals[CHANGED]);
gtk_text_buffer_set_modified(buffer, TRUE);
}
static void
gtk_text_buffer_emit_delete(GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end,
gboolean interactive)
{
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_reorder (start, end);
/* FIXME if the final newline is in the deletion range,
* shorten the range. (i.e. if end is the end iterator,
* move it backward by one)
*/
gtk_signal_emit(GTK_OBJECT(buffer),
signals[DELETE_TEXT],
start, end,
interactive);
}
/**
* 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_text" 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.
*
* Note that the final newline in the buffer may not be deleted; a
* #GtkTextBuffer always contains at least one newline. You can
* safely include the final newline in the range [@start,@end) but it
* won't be affected by the deletion.
*
**/
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);
gtk_text_buffer_emit_delete(buffer, start, end, FALSE);
}
/**
* gtk_text_buffer_delete_interactive:
* @buffer: a #GtkTextBuffer
* @start_iter: start of range to delete
* @end_iter: end of range
* @default_editable: whether the buffer is editable by default
*
* Deletes all <emphasis>editable</emphasis> text in the given range.
* Calls gtk_text_buffer_delete() for each editable sub-range of
* [@start,@end).
*
* Return value: whether some text was actually deleted
**/
gboolean
gtk_text_buffer_delete_interactive (GtkTextBuffer *buffer,
GtkTextIter *start_iter,
GtkTextIter *end_iter,
gboolean default_editable)
{
GtkTextMark *end_mark;
GtkTextMark *start_mark;
GtkTextIter iter;
gboolean current_state;
gboolean deleted_stuff = FALSE;
/* Delete all editable text in the range start_iter, end_iter */
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), FALSE);
g_return_val_if_fail (start_iter != NULL, FALSE);
g_return_val_if_fail (end_iter != NULL, FALSE);
gtk_text_iter_reorder (start_iter, end_iter);
start_mark = gtk_text_buffer_create_mark (buffer, NULL,
start_iter, TRUE);
end_mark = gtk_text_buffer_create_mark (buffer, NULL,
end_iter, FALSE);
iter = *start_iter;
current_state = gtk_text_iter_editable (&iter, default_editable);
while (TRUE)
{
gboolean new_state;
gboolean done = FALSE;
GtkTextIter end;
gtk_text_iter_forward_to_tag_toggle (&iter, NULL);
gtk_text_buffer_get_iter_at_mark (buffer, &end, end_mark);
if (gtk_text_iter_compare (&iter, &end) >= 0)
{
done = TRUE;
iter = end; /* clamp to the last boundary */
}
new_state = gtk_text_iter_editable (&iter, default_editable);
if (current_state == new_state)
{
if (done)
{
if (current_state)
{
/* We're ending an editable region. Delete said region. */
GtkTextIter start;
gtk_text_buffer_get_iter_at_mark (buffer, &start, start_mark);
gtk_text_buffer_emit_delete (buffer, &start, &iter, TRUE);
deleted_stuff = TRUE;
}
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, TRUE);
current_state = FALSE;
deleted_stuff = TRUE;
}
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);
return deleted_stuff;
}
/*
* Extracting textual buffer contents
*/
/**
* gtk_text_buffer_get_text:
* @buffer: a #GtkTextBuffer
* @start: start of a range
* @end: end of a range
* @include_hidden_chars: whether to include invisible text
*
* Returns the text in the range [@start,@end). Excludes undisplayed
* text (text marked with tags that set the invisibility attribute) if
* @include_hidden_chars is FALSE. Does not include characters
* representing embedded images, so byte and character indexes into
* the returned string do <emphasis>not</emphasis> correspond to byte
* and character indexes into the buffer. Contrast with
* gtk_text_buffer_get_slice().
*
* Return value: an allocated UTF-8 string
**/
gchar*
gtk_text_buffer_get_text (GtkTextBuffer *buffer,
const GtkTextIter *start,
const GtkTextIter *end,
gboolean include_hidden_chars)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), NULL);
g_return_val_if_fail(start != NULL, NULL);
g_return_val_if_fail(end != NULL, NULL);
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
* 0xFFFD character whenever the buffer contains
* embedded images, so byte and character indexes into
* the returned string <emphasis>do</emphasis> correspond to byte
* and character indexes into the buffer. Contrast with
* gtk_text_buffer_get_text().
*
* Return value: an allocated UTF-8 string
**/
gchar*
gtk_text_buffer_get_slice (GtkTextBuffer *buffer,
const GtkTextIter *start,
const GtkTextIter *end,
gboolean include_hidden_chars)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), NULL);
g_return_val_if_fail(start != NULL, NULL);
g_return_val_if_fail(end != NULL, NULL);
if (include_hidden_chars)
return gtk_text_iter_get_slice(start, end);
else
return gtk_text_iter_get_visible_slice(start, end);
}
/*
* Pixmaps
*/
void
gtk_text_buffer_insert_pixmap (GtkTextBuffer *buffer,
GtkTextIter *iter,
GdkPixmap *pixmap,
GdkBitmap *mask)
{
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(iter != NULL);
g_return_if_fail(pixmap != NULL);
gtk_text_btree_insert_pixmap(iter, pixmap, mask);
/* FIXME pixmap-specific signal like insert_text */
gtk_signal_emit(GTK_OBJECT(buffer), signals[CHANGED]);
gtk_text_buffer_set_modified(buffer, TRUE);
}
/*
* 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_text,
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. */
gtk_signal_emit(GTK_OBJECT(buffer),
signals[MARK_SET],
location,
mark);
}
/**
* gtk_text_buffer_set_mark:
* @buffer: a #GtkTextBuffer
* @mark_name: name of the mark
* @iter: location for the mark.
* @left_gravity: if the mark is created by this function, gravity for the new
* mark.
* @should_exist: if %TRUE, warn if the mark does not exist, and return
* immediately.
*
* Move the mark to the given position, if not @should_exist, create the mark.
*
* Return value:
**/
static GtkTextMark*
gtk_text_buffer_set_mark(GtkTextBuffer *buffer,
GtkTextMark *existing_mark,
const gchar *mark_name,
const GtkTextIter *iter,
gboolean left_gravity,
gboolean should_exist)
{
GtkTextIter location;
GtkTextMark *mark;
mark = gtk_text_btree_set_mark(get_btree (buffer),
existing_mark,
mark_name,
left_gravity,
iter,
should_exist);
if (gtk_text_btree_mark_is_insert(get_btree (buffer), mark) ||
gtk_text_btree_mark_is_selection_bound(get_btree (buffer), mark))
{
gtk_text_buffer_update_primary_selection(buffer);
}
gtk_text_btree_get_iter_at_mark(get_btree (buffer),
&location,
mark);
gtk_text_buffer_mark_set (buffer, &location, mark);
return (GtkTextMark*)mark;
}
/**
* gtk_text_buffer_create_mark:
* @buffer: a #GtkTextBuffer
* @mark_name: name for mark, or %NULL
* @where: location to place mark
* @left_gravity: whether the mark has left gravity
*
* Creates a mark at position @where. If @mark_name is %NULL, the mark
* is anonymous; otherwise, the mark can be retrieved by name using
* gtk_text_buffer_get_mark(). If a mark has left gravity, and text is
* inserted at the mark's current location, the mark will be moved to
* the left of the newly-inserted text. If the mark has right gravity
* (@left_gravity = %FALSE), the mark will end up on the right of
* newly-inserted text. The standard left-to-right cursor is a mark
* with right gravity (when you type, the cursor stays on the right
* side of the text you're typing).
*
* The caller of this function does <emphasis>not</emphasis> own a reference
* to the returned #GtkTextMark, so you can ignore the return value
* if you like.
*
* Return value: the new #GtkTextMark object
**/
GtkTextMark*
gtk_text_buffer_create_mark(GtkTextBuffer *buffer,
const gchar *mark_name,
const GtkTextIter *where,
gboolean left_gravity)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), NULL);
return gtk_text_buffer_set_mark(buffer, NULL, mark_name, where,
left_gravity, FALSE);
}
/**
* gtk_text_buffer_move_mark:
* @buffer:
* @mark:
* @where:
*
*
**/
void
gtk_text_buffer_move_mark(GtkTextBuffer *buffer,
GtkTextMark *mark,
const GtkTextIter *where)
{
g_return_if_fail (mark != NULL);
g_return_if_fail (!gtk_text_mark_deleted (mark));
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
gtk_text_buffer_set_mark(buffer, mark, NULL, where, FALSE, TRUE);
}
void
gtk_text_buffer_get_iter_at_mark(GtkTextBuffer *buffer,
GtkTextIter *iter,
GtkTextMark *mark)
{
g_return_if_fail (mark != NULL);
g_return_if_fail (!gtk_text_mark_deleted (mark));
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
gtk_text_btree_get_iter_at_mark(get_btree (buffer),
iter,
mark);
}
void
gtk_text_buffer_delete_mark(GtkTextBuffer *buffer,
GtkTextMark *mark)
{
g_return_if_fail (mark != NULL);
g_return_if_fail (!gtk_text_mark_deleted (mark));
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
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. */
gtk_signal_emit(GTK_OBJECT(buffer), signals[MARK_DELETED],
mark);
}
GtkTextMark*
gtk_text_buffer_get_mark (GtkTextBuffer *buffer,
const gchar *name)
{
GtkTextMark *mark;
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), NULL);
g_return_val_if_fail(name != NULL, NULL);
mark = gtk_text_btree_get_mark_by_name(get_btree (buffer), name);
return mark;
}
/**
* gtk_text_buffer_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 marks part of
* the buffer invalid and can be inefficient. This function moves
* them as a unit, which can be optimized.
**/
void
gtk_text_buffer_place_cursor (GtkTextBuffer *buffer,
const GtkTextIter *where)
{
GtkTextIter real;
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
real = *where;
if (gtk_text_iter_is_last (&real))
gtk_text_iter_prev_char (&real);
gtk_text_btree_place_cursor(get_btree (buffer), &real);
gtk_text_buffer_mark_set (buffer, &real,
gtk_text_buffer_get_mark (buffer,
"insert"));
gtk_text_buffer_mark_set (buffer, &real,
gtk_text_buffer_get_mark (buffer,
"selection_bound"));
}
/*
* Tags
*/
/**
* gtk_text_buffer_create_tag:
* @buffer: a #GtkTextBuffer
* @tag_name: name of the new tag, or %NULL
*
* 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 has its refcount
* incremented, as if you'd called gtk_text_tag_new().
*
* If @tag_name is %NULL, the tag is anonymous.
*
* Return value: a new tag
**/
GtkTextTag*
gtk_text_buffer_create_tag(GtkTextBuffer *buffer,
const gchar *tag_name)
{
GtkTextTag *tag;
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), NULL);
tag = gtk_text_tag_new(tag_name);
gtk_text_tag_table_add(get_table (buffer), tag);
return tag;
}
static void
gtk_text_buffer_real_apply_tag (GtkTextBuffer *buffer,
GtkTextTag *tag,
const GtkTextIter *start,
const GtkTextIter *end)
{
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)
{
gtk_text_btree_tag(start, end, tag, FALSE);
}
static void
gtk_text_buffer_emit_tag(GtkTextBuffer *buffer,
GtkTextTag *tag,
gboolean apply,
const GtkTextIter *start,
const GtkTextIter *end)
{
g_return_if_fail(tag != NULL);
if (apply)
gtk_signal_emit(GTK_OBJECT(buffer), signals[APPLY_TAG],
tag, start, end);
else
gtk_signal_emit(GTK_OBJECT(buffer), signals[REMOVE_TAG],
tag, start, end);
}
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);
gtk_text_buffer_emit_tag(buffer, tag, TRUE, start, end);
}
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);
gtk_text_buffer_emit_tag(buffer, tag, FALSE, start, end);
}
void
gtk_text_buffer_apply_tag_by_name (GtkTextBuffer *buffer,
const gchar *name,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextTag *tag;
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(name != NULL);
g_return_if_fail(start != NULL);
g_return_if_fail(end != NULL);
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);
}
void
gtk_text_buffer_remove_tag_by_name (GtkTextBuffer *buffer,
const gchar *name,
const GtkTextIter *start,
const GtkTextIter *end)
{
GtkTextTag *tag;
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
g_return_if_fail(name != NULL);
g_return_if_fail(start != NULL);
g_return_if_fail(end != NULL);
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);
}
/*
* Obtain various iterators
*/
void
gtk_text_buffer_get_iter_at_line_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint line_number,
gint char_offset)
{
g_return_if_fail(iter != NULL);
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
gtk_text_btree_get_iter_at_line_char(get_btree (buffer),
iter, line_number, char_offset);
}
void
gtk_text_buffer_get_iter_at_line (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint line_number)
{
g_return_if_fail(iter != NULL);
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
gtk_text_buffer_get_iter_at_line_offset (buffer, iter, line_number, 0);
}
void
gtk_text_buffer_get_iter_at_offset (GtkTextBuffer *buffer,
GtkTextIter *iter,
gint char_offset)
{
g_return_if_fail(iter != NULL);
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
gtk_text_btree_get_iter_at_char(get_btree (buffer), iter, char_offset);
}
void
gtk_text_buffer_get_last_iter (GtkTextBuffer *buffer,
GtkTextIter *iter)
{
g_return_if_fail(iter != NULL);
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
gtk_text_btree_get_last_iter(get_btree (buffer), iter);
}
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_last_iter(get_btree (buffer), end);
}
/*
* Modified flag
*/
gboolean
gtk_text_buffer_modified (GtkTextBuffer *buffer)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), FALSE);
return buffer->modified;
}
void
gtk_text_buffer_set_modified (GtkTextBuffer *buffer,
gboolean setting)
{
gboolean fixed_setting;
g_return_if_fail(GTK_IS_TEXT_BUFFER(buffer));
fixed_setting = setting != FALSE;
if (buffer->modified == fixed_setting)
return;
else
{
buffer->modified = fixed_setting;
gtk_signal_emit(GTK_OBJECT(buffer), signals[MODIFIED_CHANGED]);
}
}
/*
* Assorted other stuff
*/
gint
gtk_text_buffer_get_line_count(GtkTextBuffer *buffer)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), 0);
return gtk_text_btree_line_count(get_btree (buffer));
}
gint
gtk_text_buffer_get_char_count(GtkTextBuffer *buffer)
{
g_return_val_if_fail(GTK_IS_TEXT_BUFFER(buffer), 0);
return gtk_text_btree_char_count(get_btree (buffer));
}
GSList*
gtk_text_buffer_get_tags (GtkTextBuffer *buffer,
const GtkTextIter *iter)
{
GSList *retval = NULL;
GtkTextTag** tags;
gint count = 0;
tags = gtk_text_btree_get_tags(iter, &count);
if (count > 0)
{
gint i;
gtk_text_tag_array_sort(tags, count);
i = 0;
while (i < count)
{
retval = g_slist_prepend(retval, tags[i]);
++i;
}
retval = g_slist_reverse(retval);
}
if (tags)
g_free(tags);
return retval;
}
/* Called when we lose the primary selection.
*/
static void
clipboard_clear_cb (GtkClipboard *clipboard,
gpointer data)
{
/* Move selection_bound to the insertion point */
GtkTextIter insert;
GtkTextIter selection_bound;
GtkTextBuffer *buffer = GTK_TEXT_BUFFER (data);
gtk_text_buffer_get_iter_at_mark(buffer, &insert,
gtk_text_buffer_get_mark (buffer, "insert"));
gtk_text_buffer_get_iter_at_mark(buffer, &selection_bound,
gtk_text_buffer_get_mark (buffer, "selection_bound"));
if (!gtk_text_iter_equal(&insert, &selection_bound))
gtk_text_buffer_move_mark(buffer,
gtk_text_buffer_get_mark (buffer, "selection_bound"),
&insert);
}
/* Called when we have the primary selection and someone else wants our
* data in order to paste it.
*/
static void
clipboard_get_cb (GtkClipboard *clipboard,
GtkSelectionData *selection_data,
guint info,
gpointer data)
{
GtkTextBuffer *buffer = GTK_TEXT_BUFFER(data);
gchar *str;
GtkTextIter start, end;
if (gtk_text_buffer_get_selection_bounds(buffer, &start, &end))
{
/* Extract the selected text */
str = gtk_text_iter_get_visible_text(&start, &end);
gtk_selection_data_set_text (selection_data, str);
g_free (str);
}
}
/* Called when we request a paste and receive the data
*/
static void
clipboard_received (GtkClipboard *clipboard,
const gchar *str,
gpointer data)
{
ClipboardRequest *request_data = data;
GtkTextBuffer *buffer = request_data->buffer;
if (str)
{
gboolean reselect;
GtkTextIter insert_point;
GtkTextMark *paste_point_override;
paste_point_override = gtk_text_buffer_get_mark (buffer,
"__paste_point_override");
if (paste_point_override != NULL)
{
gtk_text_buffer_get_iter_at_mark(buffer, &insert_point,
paste_point_override);
gtk_text_buffer_delete_mark(buffer,
gtk_text_buffer_get_mark (buffer,
"__paste_point_override"));
}
else
{
gtk_text_buffer_get_iter_at_mark(buffer, &insert_point,
gtk_text_buffer_get_mark (buffer,
"insert"));
}
reselect = FALSE;
/* FIXME ALL OF THIS - I think that the "best method" is that when pasting
* with the cursor inside the selection area, you replace the selection
* with the new text, otherwise, you simply insert the new text at
* the point where the click occured, unselecting any selected text.
*
* This probably is best implemented as a "replace_selection" flag in
* ClipboardRequest.
*/
#if 0
if ((TRUE/* Text is selected FIXME */) &&
(!buffer->have_selection || request_data->is_clipboard))
{
reselect = TRUE;
if (buffer->have_selection)
{
/* FIXME Delete currently-selected chars but don't give up X
selection since we'll use the newly-pasted stuff as
a new X selection */
}
else
; /* FIXME Delete selected chars and give up X selection */
}
#endif
if (request_data->interactive)
gtk_text_buffer_insert_interactive (buffer, &insert_point,
str, -1, request_data->default_editable);
else
gtk_text_buffer_insert (buffer, &insert_point,
str, -1);
if (reselect)
; /* FIXME Select the region of text we just inserted */
}
g_object_unref (G_OBJECT (buffer));
g_free (request_data);
}
static void
gtk_text_buffer_update_primary_selection (GtkTextBuffer *buffer)
{
static const GtkTargetEntry targets[] = {
{ "STRING", 0, TARGET_STRING },
{ "TEXT", 0, TARGET_TEXT },
{ "COMPOUND_TEXT", 0, TARGET_COMPOUND_TEXT },
{ "UTF8_STRING", 0, TARGET_UTF8_STRING }
};
GtkTextIter start;
GtkTextIter end;
GtkClipboard *clipboard = gtk_clipboard_get (GDK_SELECTION_PRIMARY);
/* Determine whether we have a selection and adjust X selection
* accordingly.
*/
if (!gtk_text_buffer_get_selection_bounds (buffer, &start, &end))
{
if (gtk_clipboard_get_owner (clipboard) == G_OBJECT (buffer))
gtk_clipboard_clear (clipboard);
}
else
{
/* Even if we already have the selection, we need to update our
* timestamp.
*/
if (!gtk_clipboard_set_with_owner (clipboard, targets, G_N_ELEMENTS (targets),
clipboard_get_cb, clipboard_clear_cb, G_OBJECT (buffer)))
clipboard_clear_cb (clipboard, buffer);
}
}
static void
paste (GtkTextBuffer *buffer,
gboolean is_clipboard,
gboolean interactive,
gboolean default_editable)
{
ClipboardRequest *data = g_new (ClipboardRequest, 1);
data->buffer = buffer;
g_object_ref (G_OBJECT (buffer));
data->interactive = interactive;
data->default_editable = default_editable;
gtk_clipboard_request_text (gtk_clipboard_get (is_clipboard ? GDK_NONE : GDK_SELECTION_PRIMARY),
clipboard_received, data);
}
void
gtk_text_buffer_paste_primary (GtkTextBuffer *buffer,
GtkTextIter *override_location,
gboolean default_editable)
{
if (override_location != NULL)
gtk_text_buffer_create_mark(buffer,
"__paste_point_override",
override_location, FALSE);
paste (buffer, FALSE, TRUE, default_editable);
}
void
gtk_text_buffer_paste_clipboard (GtkTextBuffer *buffer,
gboolean default_editable)
{
paste (buffer, TRUE, TRUE, default_editable);
}
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 */
}
}
static void
cut_or_copy(GtkTextBuffer *buffer,
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_reorder(&start, &end);
}
}
if (!gtk_text_iter_equal(&start, &end))
{
GtkClipboard *clipboard = gtk_clipboard_get (GDK_NONE);
gchar *text;
text = gtk_text_iter_get_visible_text (&start, &end);
gtk_clipboard_set_text (clipboard, text, -1);
g_free (text);
if (delete_region_after)
{
if (interactive)
gtk_text_buffer_delete_interactive (buffer, &start, &end, default_editable);
else
gtk_text_buffer_delete (buffer, &start, &end);
}
}
}
void
gtk_text_buffer_cut_clipboard (GtkTextBuffer *buffer,
gboolean default_editable)
{
cut_or_copy (buffer, TRUE, TRUE, default_editable);
}
void
gtk_text_buffer_copy_clipboard (GtkTextBuffer *buffer)
{
cut_or_copy (buffer, FALSE, TRUE, TRUE);
}
gboolean
gtk_text_buffer_get_selection_bounds (GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
g_return_val_if_fail (buffer != NULL, FALSE);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
return gtk_text_btree_get_selection_bounds (get_btree (buffer), start, end);
}
/*
* Debug spew
*/
void
gtk_text_buffer_spew(GtkTextBuffer *buffer)
{
gtk_text_btree_spew(get_btree (buffer));
}
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