forked from AuroraMiddleware/gtk
de49f2ce05
* gtk/gtktextview.c (changed_handler): Call scroll_calc_now() unconditionally, since we may need to update the horizontal scrollbars even if the height didn't change. * gtk/gtktextlayout.c (add_preedit_attrs): Always get the extra attrs, since some of them affect size. * gtk/gtktextdisplay.c (gtk_text_layout_draw): Factor in x_offset correctly.
2722 lines
80 KiB
C
2722 lines
80 KiB
C
/* GTK - The GIMP Toolkit
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* gtktextlayout.c - calculate the layout of the text
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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* Copyright (c) 2000 Red Hat, Inc.
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* Tk->Gtk port by Havoc Pennington
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* Pango support by Owen Taylor
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*
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* This file can be used under your choice of two licenses, the LGPL
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* and the original Tk license.
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*
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* LGPL:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Original Tk license:
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*
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* This software is copyrighted by the Regents of the University of
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* California, Sun Microsystems, Inc., and other parties. The
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* following terms apply to all files associated with the software
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* unless explicitly disclaimed in individual files.
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*
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* The authors hereby grant permission to use, copy, modify,
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* distribute, and license this software and its documentation for any
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* purpose, provided that existing copyright notices are retained in
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* all copies and that this notice is included verbatim in any
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* distributions. No written agreement, license, or royalty fee is
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* required for any of the authorized uses. Modifications to this
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* software may be copyrighted by their authors and need not follow
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* the licensing terms described here, provided that the new terms are
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* clearly indicated on the first page of each file where they apply.
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*
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* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
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* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
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* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* GOVERNMENT USE: If you are acquiring this software on behalf of the
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* U.S. government, the Government shall have only "Restricted Rights"
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* in the software and related documentation as defined in the Federal
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* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
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* are acquiring the software on behalf of the Department of Defense,
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* the software shall be classified as "Commercial Computer Software"
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* and the Government shall have only "Restricted Rights" as defined
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* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
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* foregoing, the authors grant the U.S. Government and others acting
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* in its behalf permission to use and distribute the software in
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* accordance with the terms specified in this license.
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*
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "gtksignal.h"
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#include "gtktextlayout.h"
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#include "gtktextbtree.h"
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#include "gtktextiterprivate.h"
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#include <stdlib.h>
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#include <string.h>
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static GtkTextLineData *gtk_text_line_data_new (GtkTextLayout *layout,
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GtkTextLine *line);
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static GtkTextLineData *gtk_text_layout_real_wrap (GtkTextLayout *layout,
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GtkTextLine *line,
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/* may be NULL */
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GtkTextLineData *line_data);
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static void gtk_text_layout_invalidated (GtkTextLayout *layout);
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static void gtk_text_layout_real_invalidate (GtkTextLayout *layout,
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const GtkTextIter *start,
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const GtkTextIter *end);
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static void gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
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GtkTextLine *line);
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static void gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
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GtkTextLine *line,
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GtkTextLineData *line_data);
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static void gtk_text_layout_invalidate_all (GtkTextLayout *layout);
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static PangoAttribute *gtk_text_attr_appearance_new (const GtkTextAppearance *appearance);
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enum {
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INVALIDATED,
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CHANGED,
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ALLOCATE_CHILD,
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LAST_SIGNAL
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};
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enum {
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ARG_0,
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LAST_ARG
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};
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static void gtk_text_layout_init (GtkTextLayout *text_layout);
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static void gtk_text_layout_class_init (GtkTextLayoutClass *klass);
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static void gtk_text_layout_destroy (GtkObject *object);
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static void gtk_text_layout_finalize (GObject *object);
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static GtkObjectClass *parent_class = NULL;
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static guint signals[LAST_SIGNAL] = { 0 };
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PangoAttrType gtk_text_attr_appearance_type = 0;
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GtkType
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gtk_text_layout_get_type (void)
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{
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static GtkType our_type = 0;
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if (our_type == 0)
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{
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static const GtkTypeInfo our_info =
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{
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"GtkTextLayout",
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sizeof (GtkTextLayout),
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sizeof (GtkTextLayoutClass),
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(GtkClassInitFunc) gtk_text_layout_class_init,
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(GtkObjectInitFunc) gtk_text_layout_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL
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};
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our_type = gtk_type_unique (GTK_TYPE_OBJECT, &our_info);
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}
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return our_type;
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}
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static void
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gtk_text_layout_class_init (GtkTextLayoutClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GtkObjectClass *object_class = GTK_OBJECT_CLASS (klass);
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parent_class = gtk_type_class (GTK_TYPE_OBJECT);
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signals[INVALIDATED] =
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gtk_signal_new ("invalidated",
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GTK_RUN_LAST,
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GTK_CLASS_TYPE (object_class),
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GTK_SIGNAL_OFFSET (GtkTextLayoutClass, invalidated),
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gtk_marshal_VOID__VOID,
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GTK_TYPE_NONE,
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0);
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signals[CHANGED] =
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gtk_signal_new ("changed",
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GTK_RUN_LAST,
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GTK_CLASS_TYPE (object_class),
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GTK_SIGNAL_OFFSET (GtkTextLayoutClass, changed),
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gtk_marshal_VOID__INT_INT_INT,
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GTK_TYPE_NONE,
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3,
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GTK_TYPE_INT,
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GTK_TYPE_INT,
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GTK_TYPE_INT);
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signals[ALLOCATE_CHILD] =
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gtk_signal_new ("allocate_child",
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GTK_RUN_LAST,
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GTK_CLASS_TYPE (object_class),
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GTK_SIGNAL_OFFSET (GtkTextLayoutClass, allocate_child),
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gtk_marshal_VOID__OBJECT_INT_INT,
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GTK_TYPE_NONE,
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3,
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GTK_TYPE_OBJECT,
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GTK_TYPE_INT,
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GTK_TYPE_INT);
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gtk_object_class_add_signals (object_class, signals, LAST_SIGNAL);
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object_class->destroy = gtk_text_layout_destroy;
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gobject_class->finalize = gtk_text_layout_finalize;
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klass->wrap = gtk_text_layout_real_wrap;
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klass->invalidate = gtk_text_layout_real_invalidate;
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klass->free_line_data = gtk_text_layout_real_free_line_data;
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}
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void
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gtk_text_layout_init (GtkTextLayout *text_layout)
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{
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text_layout->cursor_visible = TRUE;
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}
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GtkTextLayout*
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gtk_text_layout_new (void)
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{
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return GTK_TEXT_LAYOUT (gtk_type_new (gtk_text_layout_get_type ()));
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}
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static void
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free_style_cache (GtkTextLayout *text_layout)
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{
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if (text_layout->one_style_cache)
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{
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gtk_text_attributes_unref (text_layout->one_style_cache);
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text_layout->one_style_cache = NULL;
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}
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}
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static void
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gtk_text_layout_destroy (GtkObject *object)
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{
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GtkTextLayout *layout;
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layout = GTK_TEXT_LAYOUT (object);
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gtk_text_layout_set_buffer (layout, NULL);
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if (layout->default_style)
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gtk_text_attributes_unref (layout->default_style);
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layout->default_style = NULL;
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if (layout->ltr_context)
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{
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g_object_unref (G_OBJECT (layout->ltr_context));
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layout->ltr_context = NULL;
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}
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if (layout->rtl_context)
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{
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g_object_unref (G_OBJECT (layout->rtl_context));
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layout->rtl_context = NULL;
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}
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(* parent_class->destroy) (object);
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}
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static void
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gtk_text_layout_finalize (GObject *object)
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{
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GtkTextLayout *text_layout;
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text_layout = GTK_TEXT_LAYOUT (object);
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(* G_OBJECT_CLASS (parent_class)->finalize) (object);
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}
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void
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gtk_text_layout_set_buffer (GtkTextLayout *layout,
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GtkTextBuffer *buffer)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (buffer == NULL || GTK_IS_TEXT_BUFFER (buffer));
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if (layout->buffer == buffer)
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return;
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free_style_cache (layout);
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if (layout->buffer)
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{
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gtk_text_btree_remove_view (_gtk_text_buffer_get_btree (layout->buffer),
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layout);
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gtk_object_unref (GTK_OBJECT (layout->buffer));
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layout->buffer = NULL;
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}
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if (buffer)
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{
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layout->buffer = buffer;
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gtk_object_sink (GTK_OBJECT (buffer));
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gtk_object_ref (GTK_OBJECT (buffer));
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gtk_text_btree_add_view (_gtk_text_buffer_get_btree (buffer), layout);
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}
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}
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void
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gtk_text_layout_default_style_changed (GtkTextLayout *layout)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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gtk_text_layout_invalidate_all (layout);
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}
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void
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gtk_text_layout_set_default_style (GtkTextLayout *layout,
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GtkTextAttributes *values)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (values != NULL);
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if (values == layout->default_style)
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return;
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gtk_text_attributes_ref (values);
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if (layout->default_style)
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gtk_text_attributes_unref (layout->default_style);
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layout->default_style = values;
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gtk_text_layout_default_style_changed (layout);
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}
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void
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gtk_text_layout_set_contexts (GtkTextLayout *layout,
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PangoContext *ltr_context,
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PangoContext *rtl_context)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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if (layout->ltr_context)
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g_object_unref (G_OBJECT (ltr_context));
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layout->ltr_context = ltr_context;
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g_object_ref (G_OBJECT (ltr_context));
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if (layout->rtl_context)
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g_object_unref (G_OBJECT (rtl_context));
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layout->rtl_context = rtl_context;
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g_object_ref (G_OBJECT (rtl_context));
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gtk_text_layout_invalidate_all (layout);
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}
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void
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gtk_text_layout_set_screen_width (GtkTextLayout *layout, gint width)
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{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (width >= 0);
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g_return_if_fail (layout->wrap_loop_count == 0);
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if (layout->screen_width == width)
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return;
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layout->screen_width = width;
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gtk_text_layout_invalidate_all (layout);
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}
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/**
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* gtk_text_layout_set_cursor_visible:
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* @layout: a #GtkTextLayout
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* @cursor_visible: If %FALSE, then the insertion cursor will not
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* be shown, even if the text is editable.
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*
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* Sets whether the insertion cursor should be shown. Generally,
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* widgets using #GtkTextLayout will hide the cursor when the
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* widget does not have the input focus.
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**/
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void
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gtk_text_layout_set_cursor_visible (GtkTextLayout *layout,
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gboolean cursor_visible)
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{
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cursor_visible = (cursor_visible != FALSE);
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if (layout->cursor_visible != cursor_visible)
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{
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GtkTextIter iter;
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gint y, height;
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layout->cursor_visible = cursor_visible;
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/* Now queue a redraw on the paragraph containing the cursor
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*/
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gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
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gtk_text_buffer_get_mark (layout->buffer, "insert"));
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gtk_text_layout_get_line_yrange (layout, &iter, &y, &height);
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gtk_text_layout_changed (layout, y, height, height);
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gtk_text_layout_invalidate_cache (layout, gtk_text_iter_get_text_line (&iter));
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}
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}
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/**
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* gtk_text_layout_get_cursor_visible:
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* @layout: a #GtkTextLayout
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*
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* Returns whether the insertion cursor will be shown.
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*
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* Return value: if %FALSE, the insertion cursor will not be
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shown, even if the text is editable.
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**/
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gboolean
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gtk_text_layout_get_cursor_visible (GtkTextLayout *layout)
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{
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return layout->cursor_visible;
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}
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|
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/**
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* gtk_text_layout_set_preedit_string:
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* @layout: a #PangoLayout
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* @preedit_string: a string to display at the insertion point
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* @preedit_attrs: a #PangoAttrList of attributes that apply to @preedit_string
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* @cursor_pos: position of cursor within preedit string in chars
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*
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* Set the preedit string and attributes. The preedit string is a
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* string showing text that is currently being edited and not
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* yet committed into the buffer.
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**/
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void
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gtk_text_layout_set_preedit_string (GtkTextLayout *layout,
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const gchar *preedit_string,
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PangoAttrList *preedit_attrs,
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gint cursor_pos)
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{
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GtkTextIter iter;
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GtkTextLine *line;
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GtkTextLineData *line_data;
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|
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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g_return_if_fail (preedit_attrs != NULL || preedit_string == NULL);
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|
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if (layout->preedit_string)
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g_free (layout->preedit_string);
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|
|
|
if (layout->preedit_attrs)
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|
pango_attr_list_unref (layout->preedit_attrs);
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|
|
|
if (preedit_string)
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{
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layout->preedit_string = g_strdup (preedit_string);
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layout->preedit_len = strlen (layout->preedit_string);
|
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pango_attr_list_ref (preedit_attrs);
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layout->preedit_attrs = preedit_attrs;
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|
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cursor_pos = CLAMP (cursor_pos, 0, g_utf8_strlen (layout->preedit_string, -1));
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layout->preedit_cursor = g_utf8_offset_to_pointer (layout->preedit_string, cursor_pos) - layout->preedit_string;
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}
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else
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{
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layout->preedit_string = NULL;
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layout->preedit_len = 0;
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layout->preedit_attrs = NULL;
|
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layout->preedit_cursor = 0;
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}
|
|
|
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/* Now invalidate the paragraph containing the cursor
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*/
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gtk_text_buffer_get_iter_at_mark (layout->buffer, &iter,
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gtk_text_buffer_get_mark (layout->buffer, "insert"));
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|
|
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line = gtk_text_iter_get_text_line (&iter);
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line_data = gtk_text_line_get_data (line, layout);
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if (line_data)
|
|
{
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|
gtk_text_layout_invalidate_cache (layout, line);
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|
gtk_text_line_invalidate_wrap (line, line_data);
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|
gtk_text_layout_invalidated (layout);
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}
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|
}
|
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|
|
void
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|
gtk_text_layout_get_size (GtkTextLayout *layout,
|
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gint *width,
|
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gint *height)
|
|
{
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g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
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|
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if (width)
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*width = layout->width;
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|
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if (height)
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|
*height = layout->height;
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|
}
|
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|
|
static void
|
|
gtk_text_layout_invalidated (GtkTextLayout *layout)
|
|
{
|
|
gtk_signal_emit (GTK_OBJECT (layout), signals[INVALIDATED]);
|
|
}
|
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|
|
void
|
|
gtk_text_layout_changed (GtkTextLayout *layout,
|
|
gint y,
|
|
gint old_height,
|
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gint new_height)
|
|
{
|
|
gtk_signal_emit (GTK_OBJECT (layout), signals[CHANGED], y, old_height, new_height);
|
|
}
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|
|
void
|
|
gtk_text_layout_free_line_data (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextLineData *line_data)
|
|
{
|
|
(* GTK_TEXT_LAYOUT_GET_CLASS (layout)->free_line_data)
|
|
(layout, line, line_data);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_invalidate (GtkTextLayout *layout,
|
|
const GtkTextIter *start_index,
|
|
const GtkTextIter *end_index)
|
|
{
|
|
(* GTK_TEXT_LAYOUT_GET_CLASS (layout)->invalidate)
|
|
(layout, start_index, end_index);
|
|
}
|
|
|
|
GtkTextLineData*
|
|
gtk_text_layout_wrap (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
/* may be NULL */
|
|
GtkTextLineData *line_data)
|
|
{
|
|
return (* GTK_TEXT_LAYOUT_GET_CLASS (layout)->wrap) (layout, line, line_data);
|
|
}
|
|
|
|
GSList*
|
|
gtk_text_layout_get_lines (GtkTextLayout *layout,
|
|
/* [top_y, bottom_y) */
|
|
gint top_y,
|
|
gint bottom_y,
|
|
gint *first_line_y)
|
|
{
|
|
GtkTextLine *first_btree_line;
|
|
GtkTextLine *last_btree_line;
|
|
GtkTextLine *line;
|
|
GSList *retval;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
|
|
g_return_val_if_fail (bottom_y > top_y, NULL);
|
|
|
|
retval = NULL;
|
|
|
|
first_btree_line =
|
|
gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, top_y, first_line_y);
|
|
if (first_btree_line == NULL)
|
|
{
|
|
g_assert (top_y > 0);
|
|
/* off the bottom */
|
|
return NULL;
|
|
}
|
|
|
|
/* -1 since bottom_y is one past */
|
|
last_btree_line =
|
|
gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, bottom_y - 1, NULL);
|
|
|
|
if (!last_btree_line)
|
|
last_btree_line =
|
|
gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1,
|
|
NULL);
|
|
|
|
{
|
|
GtkTextLineData *ld = gtk_text_line_get_data (last_btree_line, layout);
|
|
if (ld->height == 0)
|
|
G_BREAKPOINT ();
|
|
}
|
|
|
|
g_assert (last_btree_line != NULL);
|
|
|
|
line = first_btree_line;
|
|
while (TRUE)
|
|
{
|
|
retval = g_slist_prepend (retval, line);
|
|
|
|
if (line == last_btree_line)
|
|
break;
|
|
|
|
line = gtk_text_line_next (line);
|
|
}
|
|
|
|
retval = g_slist_reverse (retval);
|
|
|
|
return retval;
|
|
}
|
|
|
|
static void
|
|
invalidate_cached_style (GtkTextLayout *layout)
|
|
{
|
|
free_style_cache (layout);
|
|
}
|
|
|
|
/* These should be called around a loop which wraps a CONTIGUOUS bunch
|
|
* of display lines. If the lines aren't contiguous you can't call
|
|
* these.
|
|
*/
|
|
void
|
|
gtk_text_layout_wrap_loop_start (GtkTextLayout *layout)
|
|
{
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (layout->one_style_cache == NULL);
|
|
|
|
layout->wrap_loop_count += 1;
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_wrap_loop_end (GtkTextLayout *layout)
|
|
{
|
|
g_return_if_fail (layout->wrap_loop_count > 0);
|
|
|
|
layout->wrap_loop_count -= 1;
|
|
|
|
if (layout->wrap_loop_count == 0)
|
|
{
|
|
/* We cache a some stuff if we're iterating over some lines wrapping
|
|
* them. This cleans it up.
|
|
*/
|
|
/* Nuke our cached style */
|
|
invalidate_cached_style (layout);
|
|
g_assert (layout->one_style_cache == NULL);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_invalidate_all (GtkTextLayout *layout)
|
|
{
|
|
GtkTextIter start;
|
|
GtkTextIter end;
|
|
|
|
if (layout->buffer == NULL)
|
|
return;
|
|
|
|
gtk_text_buffer_get_bounds (layout->buffer, &start, &end);
|
|
|
|
gtk_text_layout_invalidate (layout, &start, &end);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_invalidate_cache (GtkTextLayout *layout,
|
|
GtkTextLine *line)
|
|
{
|
|
if (layout->one_display_cache && line == layout->one_display_cache->line)
|
|
{
|
|
GtkTextLineDisplay *tmp_display = layout->one_display_cache;
|
|
layout->one_display_cache = NULL;
|
|
gtk_text_layout_free_line_display (layout, tmp_display);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_real_invalidate (GtkTextLayout *layout,
|
|
const GtkTextIter *start,
|
|
const GtkTextIter *end)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLine *last_line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (layout->wrap_loop_count == 0);
|
|
|
|
#if 0
|
|
gtk_text_view_index_spew (start_index, "invalidate start");
|
|
gtk_text_view_index_spew (end_index, "invalidate end");
|
|
#endif
|
|
|
|
last_line = gtk_text_iter_get_text_line (end);
|
|
line = gtk_text_iter_get_text_line (start);
|
|
|
|
while (TRUE)
|
|
{
|
|
GtkTextLineData *line_data = gtk_text_line_get_data (line, layout);
|
|
|
|
if (line_data &&
|
|
(line != last_line || !gtk_text_iter_starts_line (end)))
|
|
{
|
|
gtk_text_layout_invalidate_cache (layout, line);
|
|
gtk_text_line_invalidate_wrap (line, line_data);
|
|
}
|
|
|
|
if (line == last_line)
|
|
break;
|
|
|
|
line = gtk_text_line_next (line);
|
|
}
|
|
|
|
gtk_text_layout_invalidated (layout);
|
|
}
|
|
|
|
static void
|
|
gtk_text_layout_real_free_line_data (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextLineData *line_data)
|
|
{
|
|
if (layout->one_display_cache && line == layout->one_display_cache->line)
|
|
{
|
|
GtkTextLineDisplay *tmp_display = layout->one_display_cache;
|
|
layout->one_display_cache = NULL;
|
|
gtk_text_layout_free_line_display (layout, tmp_display);
|
|
}
|
|
|
|
g_free (line_data);
|
|
}
|
|
|
|
|
|
|
|
/**
|
|
* gtk_text_layout_is_valid:
|
|
* @layout: a #GtkTextLayout
|
|
*
|
|
* Check if there are any invalid regions in a #GtkTextLayout's buffer
|
|
*
|
|
* Return value: #TRUE if any invalid regions were found
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_is_valid (GtkTextLayout *layout)
|
|
{
|
|
g_return_val_if_fail (layout != NULL, FALSE);
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), FALSE);
|
|
|
|
return gtk_text_btree_is_valid (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout);
|
|
}
|
|
|
|
static void
|
|
update_layout_size (GtkTextLayout *layout)
|
|
{
|
|
gtk_text_btree_get_view_size (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout,
|
|
&layout->width, &layout->height);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_validate_yrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @anchor: iter pointing into a line that will be used as the
|
|
* coordinate origin
|
|
* @y0: offset from the top of the line pointed to by @anchor at
|
|
* which to begin validation. (The offset here is in pixels
|
|
* after validation.)
|
|
* @y1: offset from the top of the line pointed to by @anchor at
|
|
* which to end validation. (The offset here is in pixels
|
|
* after validation.)
|
|
*
|
|
* Ensure that a region of a #GtkTextLayout is valid. The ::changed
|
|
* signal will be emitted if any lines are validated.
|
|
**/
|
|
void
|
|
gtk_text_layout_validate_yrange (GtkTextLayout *layout,
|
|
GtkTextIter *anchor,
|
|
gint y0,
|
|
gint y1)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLine *first_line = NULL;
|
|
GtkTextLine *last_line = NULL;
|
|
gint seen;
|
|
gint delta_height = 0;
|
|
gint first_line_y = 0; /* Quiet GCC */
|
|
gint last_line_y = 0; /* Quiet GCC */
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
|
|
if (y0 > 0)
|
|
y0 = 0;
|
|
if (y1 < 0)
|
|
y1 = 0;
|
|
|
|
/* Validate backwards from the anchor line to y0
|
|
*/
|
|
line = gtk_text_iter_get_text_line (anchor);
|
|
seen = 0;
|
|
while (line && seen < -y0)
|
|
{
|
|
GtkTextLineData *line_data = gtk_text_line_get_data (line, layout);
|
|
if (!line_data || !line_data->valid)
|
|
{
|
|
gint old_height = line_data ? line_data->height : 0;
|
|
|
|
gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
line_data = gtk_text_line_get_data (line, layout);
|
|
|
|
delta_height += line_data->height - old_height;
|
|
|
|
first_line = line;
|
|
first_line_y = -seen;
|
|
if (!last_line)
|
|
{
|
|
last_line = line;
|
|
last_line_y = -seen + line_data->height;
|
|
}
|
|
}
|
|
|
|
seen += line_data->height;
|
|
line = gtk_text_line_previous (line);
|
|
}
|
|
|
|
/* Validate forwards to y1 */
|
|
line = gtk_text_iter_get_text_line (anchor);
|
|
seen = 0;
|
|
while (line && seen < y1)
|
|
{
|
|
GtkTextLineData *line_data = gtk_text_line_get_data (line, layout);
|
|
if (!line_data || !line_data->valid)
|
|
{
|
|
gint old_height = line_data ? line_data->height : 0;
|
|
|
|
gtk_text_btree_validate_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
line_data = gtk_text_line_get_data (line, layout);
|
|
|
|
delta_height += line_data->height - old_height;
|
|
|
|
if (!first_line)
|
|
{
|
|
first_line = line;
|
|
first_line_y = seen;
|
|
}
|
|
last_line = line;
|
|
last_line_y = seen + line_data->height;
|
|
}
|
|
|
|
seen += line_data->height;
|
|
line = gtk_text_line_next (line);
|
|
}
|
|
|
|
/* If we found and validated any invalid lines, update size and
|
|
* emit the changed signal
|
|
*/
|
|
if (first_line)
|
|
{
|
|
gint line_top;
|
|
|
|
update_layout_size (layout);
|
|
|
|
line_top = gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
first_line, layout);
|
|
|
|
gtk_text_layout_changed (layout,
|
|
line_top,
|
|
last_line_y - first_line_y - delta_height,
|
|
last_line_y - first_line_y);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_validate:
|
|
* @tree: a #GtkTextLayout
|
|
* @max_pixels: the maximum number of pixels to validate. (No more
|
|
* than one paragraph beyond this limit will be validated)
|
|
*
|
|
* Validate regions of a #GtkTextLayout. The ::changed signal will
|
|
* be emitted for each region validated.
|
|
**/
|
|
void
|
|
gtk_text_layout_validate (GtkTextLayout *layout,
|
|
gint max_pixels)
|
|
{
|
|
gint y, old_height, new_height;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
|
|
while (max_pixels > 0 &&
|
|
gtk_text_btree_validate (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, max_pixels,
|
|
&y, &old_height, &new_height))
|
|
{
|
|
max_pixels -= new_height;
|
|
|
|
update_layout_size (layout);
|
|
gtk_text_layout_changed (layout, y, old_height, new_height);
|
|
}
|
|
}
|
|
|
|
static GtkTextLineData*
|
|
gtk_text_layout_real_wrap (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
/* may be NULL */
|
|
GtkTextLineData *line_data)
|
|
{
|
|
GtkTextLineDisplay *display;
|
|
|
|
g_return_val_if_fail (GTK_IS_TEXT_LAYOUT (layout), NULL);
|
|
|
|
if (line_data == NULL)
|
|
{
|
|
line_data = gtk_text_line_data_new (layout, line);
|
|
gtk_text_line_add_data (line, line_data);
|
|
}
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, TRUE);
|
|
line_data->width = display->width;
|
|
line_data->height = display->height;
|
|
line_data->valid = TRUE;
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
return line_data;
|
|
}
|
|
|
|
/*
|
|
* Layout utility functions
|
|
*/
|
|
|
|
/* If you get the style with get_style () you need to call
|
|
release_style () to free it. */
|
|
static GtkTextAttributes*
|
|
get_style (GtkTextLayout *layout,
|
|
const GtkTextIter *iter)
|
|
{
|
|
GtkTextTag** tags;
|
|
gint tag_count = 0;
|
|
GtkTextAttributes *style;
|
|
|
|
/* If we have the one-style cache, then it means
|
|
that we haven't seen a toggle since we filled in the
|
|
one-style cache.
|
|
*/
|
|
if (layout->one_style_cache != NULL)
|
|
{
|
|
gtk_text_attributes_ref (layout->one_style_cache);
|
|
return layout->one_style_cache;
|
|
}
|
|
|
|
g_assert (layout->one_style_cache == NULL);
|
|
|
|
/* Get the tags at this spot */
|
|
tags = gtk_text_btree_get_tags (iter, &tag_count);
|
|
|
|
/* No tags, use default style */
|
|
if (tags == NULL || tag_count == 0)
|
|
{
|
|
/* One ref for the return value, one ref for the
|
|
layout->one_style_cache reference */
|
|
gtk_text_attributes_ref (layout->default_style);
|
|
gtk_text_attributes_ref (layout->default_style);
|
|
layout->one_style_cache = layout->default_style;
|
|
|
|
if (tags)
|
|
g_free (tags);
|
|
|
|
return layout->default_style;
|
|
}
|
|
|
|
/* Sort tags in ascending order of priority */
|
|
gtk_text_tag_array_sort (tags, tag_count);
|
|
|
|
style = gtk_text_attributes_new ();
|
|
|
|
gtk_text_attributes_copy (layout->default_style,
|
|
style);
|
|
|
|
gtk_text_attributes_fill_from_tags (style,
|
|
tags,
|
|
tag_count);
|
|
|
|
g_free (tags);
|
|
|
|
g_assert (style->refcount == 1);
|
|
|
|
/* Leave this style as the last one seen */
|
|
g_assert (layout->one_style_cache == NULL);
|
|
gtk_text_attributes_ref (style); /* ref held by layout->one_style_cache */
|
|
layout->one_style_cache = style;
|
|
|
|
/* Returning yet another refcount */
|
|
return style;
|
|
}
|
|
|
|
static void
|
|
release_style (GtkTextLayout *layout,
|
|
GtkTextAttributes *style)
|
|
{
|
|
g_return_if_fail (style != NULL);
|
|
g_return_if_fail (style->refcount > 0);
|
|
|
|
gtk_text_attributes_unref (style);
|
|
}
|
|
|
|
/*
|
|
* Lines
|
|
*/
|
|
|
|
/* This function tries to optimize the case where a line
|
|
is completely invisible */
|
|
static gboolean
|
|
totally_invisible_line (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
GtkTextIter *iter)
|
|
{
|
|
GtkTextLineSegment *seg;
|
|
int bytes = 0;
|
|
|
|
/* If we have a cached style, then we know it does actually apply
|
|
and we can just see if it is invisible. */
|
|
if (layout->one_style_cache &&
|
|
!layout->one_style_cache->invisible)
|
|
return FALSE;
|
|
/* Without the cache, we check if the first char is visible, if so
|
|
we are partially visible. Note that we have to check this since
|
|
we don't know the current invisible/noninvisible toggle state; this
|
|
function can use the whole btree to get it right. */
|
|
else
|
|
{
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, line, 0);
|
|
|
|
if (!gtk_text_btree_char_is_invisible (iter))
|
|
return FALSE;
|
|
}
|
|
|
|
bytes = 0;
|
|
seg = line->segments;
|
|
|
|
while (seg != NULL)
|
|
{
|
|
if (seg->byte_count > 0)
|
|
bytes += seg->byte_count;
|
|
|
|
/* Note that these two tests can cause us to bail out
|
|
when we shouldn't, because a higher-priority tag
|
|
may override these settings. However the important
|
|
thing is to only invisible really-invisible lines, rather
|
|
than to invisible all really-invisible lines. */
|
|
|
|
else if (seg->type == >k_text_toggle_on_type)
|
|
{
|
|
invalidate_cached_style (layout);
|
|
|
|
/* Bail out if an elision-unsetting tag begins */
|
|
if (seg->body.toggle.info->tag->invisible_set &&
|
|
!seg->body.toggle.info->tag->values->invisible)
|
|
break;
|
|
}
|
|
else if (seg->type == >k_text_toggle_off_type)
|
|
{
|
|
invalidate_cached_style (layout);
|
|
|
|
/* Bail out if an elision-setting tag ends */
|
|
if (seg->body.toggle.info->tag->invisible_set &&
|
|
seg->body.toggle.info->tag->values->invisible)
|
|
break;
|
|
}
|
|
|
|
seg = seg->next;
|
|
}
|
|
|
|
if (seg != NULL) /* didn't reach line end */
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
set_para_values (GtkTextLayout *layout,
|
|
GtkTextAttributes *style,
|
|
GtkTextLineDisplay *display,
|
|
gdouble *align)
|
|
{
|
|
PangoAlignment pango_align = PANGO_ALIGN_LEFT;
|
|
int layout_width;
|
|
|
|
display->direction = style->direction;
|
|
|
|
if (display->direction == GTK_TEXT_DIR_LTR)
|
|
display->layout = pango_layout_new (layout->ltr_context);
|
|
else
|
|
display->layout = pango_layout_new (layout->rtl_context);
|
|
|
|
switch (style->justify)
|
|
{
|
|
case GTK_JUSTIFY_LEFT:
|
|
pango_align = (style->direction == GTK_TEXT_DIR_LTR) ? PANGO_ALIGN_LEFT : PANGO_ALIGN_RIGHT;
|
|
break;
|
|
case GTK_JUSTIFY_RIGHT:
|
|
pango_align = (style->direction == GTK_TEXT_DIR_LTR) ? PANGO_ALIGN_RIGHT : PANGO_ALIGN_LEFT;
|
|
break;
|
|
case GTK_JUSTIFY_CENTER:
|
|
pango_align = PANGO_ALIGN_CENTER;
|
|
break;
|
|
case GTK_JUSTIFY_FILL:
|
|
g_warning ("FIXME we don't support GTK_JUSTIFY_FILL yet");
|
|
break;
|
|
default:
|
|
g_assert_not_reached ();
|
|
break;
|
|
}
|
|
|
|
switch (pango_align)
|
|
{
|
|
case PANGO_ALIGN_LEFT:
|
|
*align = 0.0;
|
|
break;
|
|
case PANGO_ALIGN_RIGHT:
|
|
*align = 1.0;
|
|
break;
|
|
case PANGO_ALIGN_CENTER:
|
|
*align = 0.5;
|
|
break;
|
|
}
|
|
|
|
pango_layout_set_alignment (display->layout, pango_align);
|
|
pango_layout_set_spacing (display->layout,
|
|
style->pixels_inside_wrap * PANGO_SCALE);
|
|
|
|
if (style->tabs)
|
|
pango_layout_set_tabs (display->layout, style->tabs);
|
|
|
|
display->top_margin = style->pixels_above_lines;
|
|
display->height = style->pixels_above_lines + style->pixels_below_lines;
|
|
display->bottom_margin = style->pixels_below_lines;
|
|
display->left_margin = style->left_margin;
|
|
display->right_margin = style->right_margin;
|
|
|
|
display->x_offset = display->left_margin;
|
|
|
|
pango_layout_set_indent (display->layout,
|
|
style->indent * PANGO_SCALE);
|
|
|
|
switch (style->wrap_mode)
|
|
{
|
|
case GTK_WRAPMODE_CHAR:
|
|
/* FIXME: Handle this; for now, fall-through */
|
|
case GTK_WRAPMODE_WORD:
|
|
display->total_width = -1;
|
|
layout_width = layout->screen_width - display->left_margin - display->right_margin;
|
|
pango_layout_set_width (display->layout, layout_width * PANGO_SCALE);
|
|
break;
|
|
case GTK_WRAPMODE_NONE:
|
|
display->total_width = MAX (layout->screen_width, layout->width) - display->left_margin - display->right_margin;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static PangoAttribute *
|
|
gtk_text_attr_appearance_copy (const PangoAttribute *attr)
|
|
{
|
|
const GtkTextAttrAppearance *appearance_attr = (const GtkTextAttrAppearance *)attr;
|
|
|
|
return gtk_text_attr_appearance_new (&appearance_attr->appearance);
|
|
}
|
|
|
|
static void
|
|
gtk_text_attr_appearance_destroy (PangoAttribute *attr)
|
|
{
|
|
GtkTextAppearance *appearance = &((GtkTextAttrAppearance *)attr)->appearance;
|
|
|
|
if (appearance->bg_stipple)
|
|
gdk_drawable_unref (appearance->bg_stipple);
|
|
if (appearance->fg_stipple)
|
|
gdk_drawable_unref (appearance->fg_stipple);
|
|
|
|
g_free (attr);
|
|
}
|
|
|
|
static gboolean
|
|
gtk_text_attr_appearance_compare (const PangoAttribute *attr1,
|
|
const PangoAttribute *attr2)
|
|
{
|
|
const GtkTextAppearance *appearance1 = &((const GtkTextAttrAppearance *)attr1)->appearance;
|
|
const GtkTextAppearance *appearance2 = &((const GtkTextAttrAppearance *)attr2)->appearance;
|
|
|
|
return (gdk_color_equal (&appearance1->fg_color, &appearance2->fg_color) &&
|
|
gdk_color_equal (&appearance1->bg_color, &appearance2->bg_color) &&
|
|
appearance1->fg_stipple == appearance2->fg_stipple &&
|
|
appearance1->bg_stipple == appearance2->bg_stipple &&
|
|
appearance1->underline == appearance2->underline &&
|
|
appearance1->strikethrough == appearance2->strikethrough &&
|
|
appearance1->draw_bg == appearance2->draw_bg);
|
|
|
|
}
|
|
|
|
/**
|
|
* gtk_text_attr_appearance_new:
|
|
* @desc:
|
|
*
|
|
* Create a new font description attribute. (This attribute
|
|
* allows setting family, style, weight, variant, stretch,
|
|
* and size simultaneously.)
|
|
*
|
|
* Return value:
|
|
**/
|
|
static PangoAttribute *
|
|
gtk_text_attr_appearance_new (const GtkTextAppearance *appearance)
|
|
{
|
|
static PangoAttrClass klass = {
|
|
0,
|
|
gtk_text_attr_appearance_copy,
|
|
gtk_text_attr_appearance_destroy,
|
|
gtk_text_attr_appearance_compare
|
|
};
|
|
|
|
GtkTextAttrAppearance *result;
|
|
|
|
if (!klass.type)
|
|
klass.type = gtk_text_attr_appearance_type =
|
|
pango_attr_type_register ("GtkTextAttrAppearance");
|
|
|
|
result = g_new (GtkTextAttrAppearance, 1);
|
|
result->attr.klass = &klass;
|
|
|
|
result->appearance = *appearance;
|
|
|
|
if (appearance->bg_stipple)
|
|
gdk_drawable_ref (appearance->bg_stipple);
|
|
if (appearance->fg_stipple)
|
|
gdk_drawable_ref (appearance->fg_stipple);
|
|
|
|
return (PangoAttribute *)result;
|
|
}
|
|
|
|
|
|
static void
|
|
add_generic_attrs (GtkTextLayout *layout,
|
|
GtkTextAppearance *appearance,
|
|
gint byte_count,
|
|
PangoAttrList *attrs,
|
|
gint start,
|
|
gboolean size_only,
|
|
gboolean is_text)
|
|
{
|
|
PangoAttribute *attr;
|
|
|
|
if (appearance->underline != PANGO_UNDERLINE_NONE)
|
|
{
|
|
attr = pango_attr_underline_new (appearance->underline);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
if (appearance->rise != 0)
|
|
{
|
|
attr = pango_attr_rise_new (appearance->rise);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
if (!size_only)
|
|
{
|
|
attr = gtk_text_attr_appearance_new (appearance);
|
|
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
((GtkTextAttrAppearance *)attr)->appearance.is_text = is_text;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
}
|
|
|
|
static void
|
|
add_text_attrs (GtkTextLayout *layout,
|
|
GtkTextAttributes *style,
|
|
gint byte_count,
|
|
PangoAttrList *attrs,
|
|
gint start,
|
|
gboolean size_only)
|
|
{
|
|
PangoAttribute *attr;
|
|
|
|
attr = pango_attr_font_desc_new (&style->font);
|
|
attr->start_index = start;
|
|
attr->end_index = start + byte_count;
|
|
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
static void
|
|
add_pixbuf_attrs (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextAttributes *style,
|
|
GtkTextLineSegment *seg,
|
|
PangoAttrList *attrs,
|
|
gint start)
|
|
{
|
|
PangoAttribute *attr;
|
|
PangoRectangle logical_rect;
|
|
GtkTextPixbuf *pixbuf = &seg->body.pixbuf;
|
|
gint width, height;
|
|
|
|
width = gdk_pixbuf_get_width (pixbuf->pixbuf);
|
|
height = gdk_pixbuf_get_height (pixbuf->pixbuf);
|
|
|
|
logical_rect.x = 0;
|
|
logical_rect.y = -height * PANGO_SCALE;
|
|
logical_rect.width = width * PANGO_SCALE;
|
|
logical_rect.height = height * PANGO_SCALE;
|
|
|
|
attr = pango_attr_shape_new (&logical_rect, &logical_rect);
|
|
attr->start_index = start;
|
|
attr->end_index = start + seg->byte_count;
|
|
pango_attr_list_insert (attrs, attr);
|
|
|
|
display->shaped_objects =
|
|
g_slist_append (display->shaped_objects, pixbuf->pixbuf);
|
|
}
|
|
|
|
static void
|
|
add_child_attrs (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextAttributes *style,
|
|
GtkTextLineSegment *seg,
|
|
PangoAttrList *attrs,
|
|
gint start)
|
|
{
|
|
PangoAttribute *attr;
|
|
PangoRectangle logical_rect;
|
|
GtkTextChildAnchor *anchor;
|
|
gint width, height;
|
|
GSList *tmp_list;
|
|
|
|
width = 1;
|
|
height = 1;
|
|
|
|
anchor = seg->body.child.obj;
|
|
|
|
tmp_list = seg->body.child.widgets;
|
|
while (tmp_list != NULL)
|
|
{
|
|
GtkWidget *child = tmp_list->data;
|
|
|
|
if (_gtk_anchored_child_get_layout (child) == layout)
|
|
{
|
|
/* Found it */
|
|
GtkRequisition req;
|
|
|
|
gtk_widget_get_child_requisition (child, &req);
|
|
|
|
width = req.width;
|
|
height = req.height;
|
|
|
|
display->shaped_objects =
|
|
g_slist_append (display->shaped_objects, child);
|
|
break;
|
|
}
|
|
|
|
tmp_list = g_slist_next (tmp_list);
|
|
}
|
|
|
|
if (tmp_list == NULL)
|
|
{
|
|
/* No widget at this anchor in this display;
|
|
* not an error.
|
|
*/
|
|
|
|
return;
|
|
}
|
|
|
|
if (layout->preedit_string)
|
|
{
|
|
g_free (layout->preedit_string);
|
|
layout->preedit_string = NULL;
|
|
}
|
|
|
|
if (layout->preedit_attrs)
|
|
{
|
|
pango_attr_list_unref (layout->preedit_attrs);
|
|
layout->preedit_attrs = NULL;
|
|
}
|
|
|
|
logical_rect.x = 0;
|
|
logical_rect.y = -height * PANGO_SCALE;
|
|
logical_rect.width = width * PANGO_SCALE;
|
|
logical_rect.height = height * PANGO_SCALE;
|
|
|
|
attr = pango_attr_shape_new (&logical_rect, &logical_rect);
|
|
attr->start_index = start;
|
|
attr->end_index = start + seg->byte_count;
|
|
pango_attr_list_insert (attrs, attr);
|
|
}
|
|
|
|
static void
|
|
add_cursor (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextLineSegment *seg,
|
|
gint start)
|
|
{
|
|
PangoRectangle strong_pos, weak_pos;
|
|
GtkTextCursorDisplay *cursor;
|
|
|
|
/* Hide insertion cursor when we have a selection or the layout
|
|
* user has hidden the cursor.
|
|
*/
|
|
if (gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj) &&
|
|
(!layout->cursor_visible ||
|
|
gtk_text_buffer_get_selection_bounds (layout->buffer, NULL, NULL)))
|
|
return;
|
|
|
|
pango_layout_get_cursor_pos (display->layout, start, &strong_pos, &weak_pos);
|
|
|
|
cursor = g_new (GtkTextCursorDisplay, 1);
|
|
|
|
cursor->x = PANGO_PIXELS (strong_pos.x);
|
|
cursor->y = PANGO_PIXELS (strong_pos.y);
|
|
cursor->height = PANGO_PIXELS (strong_pos.height);
|
|
cursor->is_strong = TRUE;
|
|
display->cursors = g_slist_prepend (display->cursors, cursor);
|
|
|
|
if (weak_pos.x == strong_pos.x)
|
|
cursor->is_weak = TRUE;
|
|
else
|
|
{
|
|
cursor->is_weak = FALSE;
|
|
|
|
cursor = g_new (GtkTextCursorDisplay, 1);
|
|
|
|
cursor->x = PANGO_PIXELS (weak_pos.x);
|
|
cursor->y = PANGO_PIXELS (weak_pos.y);
|
|
cursor->height = PANGO_PIXELS (weak_pos.height);
|
|
cursor->is_strong = FALSE;
|
|
cursor->is_weak = TRUE;
|
|
display->cursors = g_slist_prepend (display->cursors, cursor);
|
|
}
|
|
}
|
|
|
|
static void
|
|
allocate_child_widgets (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display)
|
|
{
|
|
|
|
#if 0
|
|
gtk_signal_emit (GTK_OBJECT (layout),
|
|
signals[ALLOCATE_CHILD],
|
|
child,
|
|
x, y);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
convert_color (GdkColor *result,
|
|
PangoAttrColor *attr)
|
|
{
|
|
result->red = attr->red;
|
|
result->blue = attr->blue;
|
|
result->green = attr->green;
|
|
}
|
|
|
|
/* This function is used to convert the preedit string attributes, which are
|
|
* standard PangoAttributes, into the custom attributes used by the text
|
|
* widget and insert them into a attr list with a given offset.
|
|
*/
|
|
static void
|
|
add_preedit_attrs (GtkTextLayout *layout,
|
|
GtkTextAttributes *style,
|
|
PangoAttrList *attrs,
|
|
gint offset,
|
|
gboolean size_only)
|
|
{
|
|
PangoAttrIterator *iter = pango_attr_list_get_iterator (layout->preedit_attrs);
|
|
|
|
do
|
|
{
|
|
GtkTextAppearance appearance = style->appearance;
|
|
PangoFontDescription font_desc;
|
|
PangoAttribute *insert_attr;
|
|
GSList *extra_attrs = NULL;
|
|
GSList *tmp_list;
|
|
gint start, end;
|
|
|
|
pango_attr_iterator_range (iter, &start, &end);
|
|
|
|
if (end == G_MAXINT)
|
|
end = layout->preedit_len;
|
|
|
|
pango_attr_iterator_get_font (iter, &style->font,
|
|
&font_desc, &extra_attrs);
|
|
|
|
tmp_list = extra_attrs;
|
|
while (tmp_list)
|
|
{
|
|
PangoAttribute *attr = tmp_list->data;
|
|
|
|
switch (attr->klass->type)
|
|
{
|
|
case PANGO_ATTR_FOREGROUND:
|
|
convert_color (&appearance.fg_color, (PangoAttrColor *)attr);
|
|
break;
|
|
case PANGO_ATTR_BACKGROUND:
|
|
convert_color (&appearance.bg_color, (PangoAttrColor *)attr);
|
|
appearance.draw_bg = TRUE;
|
|
break;
|
|
case PANGO_ATTR_UNDERLINE:
|
|
appearance.underline = ((PangoAttrInt *)attr)->value;
|
|
break;
|
|
case PANGO_ATTR_STRIKETHROUGH:
|
|
appearance.strikethrough = ((PangoAttrInt *)attr)->value;
|
|
break;
|
|
case PANGO_ATTR_RISE:
|
|
appearance.rise = ((PangoAttrInt *)attr)->value;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
pango_attribute_destroy (attr);
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
g_slist_free (extra_attrs);
|
|
|
|
insert_attr = pango_attr_font_desc_new (&font_desc);
|
|
insert_attr->start_index = start + offset;
|
|
insert_attr->end_index = end + offset;
|
|
|
|
pango_attr_list_insert (attrs, insert_attr);
|
|
|
|
add_generic_attrs (layout, &appearance, end - start,
|
|
attrs, start + offset,
|
|
size_only, TRUE);
|
|
}
|
|
while (pango_attr_iterator_next (iter));
|
|
|
|
pango_attr_iterator_destroy (iter);
|
|
}
|
|
|
|
GtkTextLineDisplay *
|
|
gtk_text_layout_get_line_display (GtkTextLayout *layout,
|
|
GtkTextLine *line,
|
|
gboolean size_only)
|
|
{
|
|
GtkTextLineDisplay *display;
|
|
GtkTextLineSegment *seg;
|
|
GtkTextIter iter;
|
|
GtkTextAttributes *style;
|
|
gchar *text;
|
|
PangoAttrList *attrs;
|
|
gint byte_count, byte_offset;
|
|
gdouble align;
|
|
PangoRectangle extents;
|
|
gboolean para_values_set = FALSE;
|
|
GSList *cursor_byte_offsets = NULL;
|
|
GSList *cursor_segs = NULL;
|
|
GSList *tmp_list1, *tmp_list2;
|
|
|
|
g_return_val_if_fail (line != NULL, NULL);
|
|
|
|
if (layout->one_display_cache)
|
|
{
|
|
if (line == layout->one_display_cache->line &&
|
|
(size_only || !layout->one_display_cache->size_only))
|
|
return layout->one_display_cache;
|
|
else
|
|
{
|
|
GtkTextLineDisplay *tmp_display = layout->one_display_cache;
|
|
layout->one_display_cache = NULL;
|
|
gtk_text_layout_free_line_display (layout, tmp_display);
|
|
}
|
|
}
|
|
|
|
display = g_new0 (GtkTextLineDisplay, 1);
|
|
|
|
display->size_only = size_only;
|
|
display->line = line;
|
|
display->insert_index = -1;
|
|
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&iter, line, 0);
|
|
|
|
/* Special-case optimization for completely
|
|
* invisible lines; makes it faster to deal
|
|
* with sequences of invisible lines.
|
|
*/
|
|
if (totally_invisible_line (layout, line, &iter))
|
|
return display;
|
|
|
|
/* Allocate space for flat text for buffer
|
|
*/
|
|
byte_count = gtk_text_line_byte_count (line);
|
|
text = g_malloc (byte_count);
|
|
|
|
attrs = pango_attr_list_new ();
|
|
|
|
/* Iterate over segments, creating display chunks for them. */
|
|
byte_offset = 0;
|
|
seg = gtk_text_iter_get_any_segment (&iter);
|
|
while (seg != NULL)
|
|
{
|
|
/* Displayable segments */
|
|
if (seg->type == >k_text_char_type ||
|
|
seg->type == >k_text_pixbuf_type ||
|
|
seg->type == >k_text_child_type)
|
|
{
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
&iter, line,
|
|
byte_offset);
|
|
style = get_style (layout, &iter);
|
|
|
|
/* We have to delay setting the paragraph values until we
|
|
* hit the first pixbuf or text segment because toggles at
|
|
* the beginning of the paragraph should affect the
|
|
* paragraph-global values
|
|
*/
|
|
if (!para_values_set)
|
|
{
|
|
set_para_values (layout, style, display, &align);
|
|
para_values_set = TRUE;
|
|
}
|
|
|
|
/* First see if the chunk is invisible, and ignore it if so. Tk
|
|
* looked at tabs, wrap mode, etc. before doing this, but
|
|
* that made no sense to me, so I am just skipping the
|
|
* invisible chunks
|
|
*/
|
|
if (!style->invisible)
|
|
{
|
|
if (seg->type == >k_text_char_type)
|
|
{
|
|
/* We don't want to split segments because of marks,
|
|
* so we scan forward for more segments only
|
|
* separated from us by marks. In theory, we should
|
|
* also merge segments with identical styles, even
|
|
* if there are toggles in-between
|
|
*/
|
|
|
|
gint byte_count = 0;
|
|
GtkTextLineSegment *prev_seg = NULL;
|
|
|
|
while (seg)
|
|
{
|
|
if (seg->type == >k_text_char_type)
|
|
{
|
|
memcpy (text + byte_offset, seg->body.chars, seg->byte_count);
|
|
byte_offset += seg->byte_count;
|
|
byte_count += seg->byte_count;
|
|
}
|
|
else if (seg->type == >k_text_right_mark_type ||
|
|
seg->type == >k_text_left_mark_type)
|
|
{
|
|
/* If we have preedit string, break out of this loop - we'll almost
|
|
* certainly have different attributes on the preedit string
|
|
*/
|
|
|
|
if (layout->preedit_len > 0 &&
|
|
gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
break;
|
|
|
|
if (seg->body.mark.visible)
|
|
{
|
|
cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets, GINT_TO_POINTER (byte_offset));
|
|
cursor_segs = g_slist_prepend (cursor_segs, seg);
|
|
}
|
|
}
|
|
else
|
|
break;
|
|
|
|
prev_seg = seg;
|
|
seg = seg->next;
|
|
}
|
|
|
|
seg = prev_seg; /* Back up one */
|
|
add_generic_attrs (layout, &style->appearance,
|
|
byte_count,
|
|
attrs, byte_offset - byte_count,
|
|
size_only, TRUE);
|
|
add_text_attrs (layout, style, byte_count, attrs,
|
|
byte_offset - byte_count, size_only);
|
|
}
|
|
else if (seg->type == >k_text_pixbuf_type)
|
|
{
|
|
add_generic_attrs (layout,
|
|
&style->appearance,
|
|
seg->byte_count,
|
|
attrs, byte_offset,
|
|
size_only, FALSE);
|
|
add_pixbuf_attrs (layout, display, style,
|
|
seg, attrs, byte_offset);
|
|
memcpy (text + byte_offset, gtk_text_unknown_char_utf8,
|
|
seg->byte_count);
|
|
byte_offset += seg->byte_count;
|
|
}
|
|
else if (seg->type == >k_text_child_type)
|
|
{
|
|
add_generic_attrs (layout, &style->appearance,
|
|
seg->byte_count,
|
|
attrs, byte_offset,
|
|
size_only, FALSE);
|
|
add_child_attrs (layout, display, style,
|
|
seg, attrs, byte_offset);
|
|
memcpy (text + byte_offset, gtk_text_unknown_char_utf8,
|
|
seg->byte_count);
|
|
byte_offset += seg->byte_count;
|
|
}
|
|
else
|
|
{
|
|
g_assert_not_reached ();
|
|
}
|
|
}
|
|
|
|
release_style (layout, style);
|
|
}
|
|
|
|
/* Toggles */
|
|
else if (seg->type == >k_text_toggle_on_type ||
|
|
seg->type == >k_text_toggle_off_type)
|
|
{
|
|
/* Style may have changed, drop our
|
|
current cached style */
|
|
invalidate_cached_style (layout);
|
|
}
|
|
|
|
/* Marks */
|
|
else if (seg->type == >k_text_right_mark_type ||
|
|
seg->type == >k_text_left_mark_type)
|
|
{
|
|
gint cursor_offset = 0;
|
|
|
|
/* At the insertion point, add the preedit string, if any */
|
|
|
|
if (gtk_text_btree_mark_is_insert (_gtk_text_buffer_get_btree (layout->buffer),
|
|
seg->body.mark.obj))
|
|
{
|
|
display->insert_index = byte_offset;
|
|
|
|
if (layout->preedit_len > 0)
|
|
{
|
|
byte_count += layout->preedit_len;
|
|
text = g_realloc (text, byte_count);
|
|
|
|
style = get_style (layout, &iter);
|
|
add_preedit_attrs (layout, style, attrs, byte_offset, size_only);
|
|
release_style (layout, style);
|
|
|
|
memcpy (text + byte_offset, layout->preedit_string, layout->preedit_len);
|
|
byte_offset += layout->preedit_len;
|
|
|
|
cursor_offset = layout->preedit_cursor - layout->preedit_len;
|
|
}
|
|
}
|
|
|
|
|
|
/* Display visible marks */
|
|
|
|
if (seg->body.mark.visible)
|
|
{
|
|
cursor_byte_offsets = g_slist_prepend (cursor_byte_offsets,
|
|
GINT_TO_POINTER (byte_offset + cursor_offset));
|
|
cursor_segs = g_slist_prepend (cursor_segs, seg);
|
|
}
|
|
}
|
|
|
|
else
|
|
g_error ("Unknown segment type: %s", seg->type->name);
|
|
|
|
seg = seg->next;
|
|
}
|
|
|
|
if (!para_values_set)
|
|
{
|
|
style = get_style (layout, &iter);
|
|
set_para_values (layout, style, display, &align);
|
|
release_style (layout, style);
|
|
}
|
|
|
|
/* Pango doesn't want the trailing new line */
|
|
if (byte_offset > 0 && text[byte_offset - 1] == '\n')
|
|
byte_offset--;
|
|
|
|
pango_layout_set_text (display->layout, text, byte_offset);
|
|
pango_layout_set_attributes (display->layout, attrs);
|
|
|
|
tmp_list1 = cursor_byte_offsets;
|
|
tmp_list2 = cursor_segs;
|
|
while (tmp_list1)
|
|
{
|
|
add_cursor (layout, display, tmp_list2->data,
|
|
GPOINTER_TO_INT (tmp_list1->data));
|
|
tmp_list1 = tmp_list1->next;
|
|
tmp_list2 = tmp_list2->next;
|
|
}
|
|
g_slist_free (cursor_byte_offsets);
|
|
g_slist_free (cursor_segs);
|
|
|
|
pango_layout_get_extents (display->layout, NULL, &extents);
|
|
|
|
if (display->total_width >= 0)
|
|
display->x_offset += (display->total_width - PANGO_PIXELS (extents.width)) * align;
|
|
|
|
display->width = PANGO_PIXELS (extents.width) + display->x_offset + display->right_margin;
|
|
display->height += PANGO_PIXELS (extents.height);
|
|
|
|
/* Free this if we aren't in a loop */
|
|
if (layout->wrap_loop_count == 0)
|
|
invalidate_cached_style (layout);
|
|
|
|
g_free (text);
|
|
pango_attr_list_unref (attrs);
|
|
|
|
layout->one_display_cache = display;
|
|
|
|
allocate_child_widgets (layout, display);
|
|
|
|
return display;
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_free_line_display (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display)
|
|
{
|
|
if (display != layout->one_display_cache)
|
|
{
|
|
g_object_unref (G_OBJECT (display->layout));
|
|
|
|
if (display->cursors)
|
|
{
|
|
g_slist_foreach (display->cursors, (GFunc)g_free, NULL);
|
|
g_slist_free (display->cursors);
|
|
g_slist_free (display->shaped_objects);
|
|
}
|
|
|
|
g_free (display);
|
|
}
|
|
}
|
|
|
|
/* Functions to convert iter <=> index for the line of a GtkTextLineDisplay
|
|
* taking into account the preedit string, if necessary.
|
|
*/
|
|
gint
|
|
line_display_iter_to_index (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
const GtkTextIter *iter)
|
|
{
|
|
gint index;
|
|
|
|
g_return_val_if_fail (gtk_text_iter_get_text_line (iter) == display->line, 0);
|
|
|
|
index = gtk_text_iter_get_line_index (iter);
|
|
|
|
if (index >= display->insert_index)
|
|
index += layout->preedit_len;
|
|
|
|
return index;
|
|
}
|
|
|
|
void
|
|
line_display_index_to_iter (GtkTextLayout *layout,
|
|
GtkTextLineDisplay *display,
|
|
GtkTextIter *iter,
|
|
gint index,
|
|
gint trailing)
|
|
{
|
|
if (index >= display->insert_index + layout->preedit_len)
|
|
index -= layout->preedit_len;
|
|
else if (index > display->insert_index)
|
|
{
|
|
index = display->insert_index;
|
|
trailing = 0;
|
|
}
|
|
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, display->line, index);
|
|
gtk_text_iter_forward_chars (iter, trailing);
|
|
}
|
|
|
|
/* FIXME: This really doesn't belong in this file ... */
|
|
static GtkTextLineData*
|
|
gtk_text_line_data_new (GtkTextLayout *layout,
|
|
GtkTextLine *line)
|
|
{
|
|
GtkTextLineData *line_data;
|
|
|
|
line_data = g_new (GtkTextLineData, 1);
|
|
|
|
line_data->view_id = layout;
|
|
line_data->next = NULL;
|
|
line_data->width = 0;
|
|
line_data->height = 0;
|
|
line_data->valid = FALSE;
|
|
|
|
return line_data;
|
|
}
|
|
|
|
static void
|
|
get_line_at_y (GtkTextLayout *layout,
|
|
gint y,
|
|
GtkTextLine **line,
|
|
gint *line_top)
|
|
{
|
|
if (y < 0)
|
|
y = 0;
|
|
if (y > layout->height)
|
|
y = layout->height;
|
|
|
|
*line = gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, y, line_top);
|
|
if (*line == NULL)
|
|
{
|
|
*line = gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1, NULL);
|
|
if (line_top)
|
|
*line_top =
|
|
gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
*line, layout);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_get_line_at_y:
|
|
* @layout: a #GtkLayout
|
|
* @target_iter: the iterator in which the result is stored
|
|
* @y: the y positition
|
|
* @line_top: location to store the y coordinate of the
|
|
* top of the line. (Can by %NULL.)
|
|
*
|
|
* Get the iter at the beginning of the line which is displayed
|
|
* at the given y.
|
|
**/
|
|
void
|
|
gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
|
|
GtkTextIter *target_iter,
|
|
gint y,
|
|
gint *line_top)
|
|
{
|
|
GtkTextLine *line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (target_iter != NULL);
|
|
|
|
get_line_at_y (layout, y, &line, line_top);
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
target_iter, line, 0);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
|
|
GtkTextIter *target_iter,
|
|
gint x, gint y)
|
|
{
|
|
GtkTextLine *line;
|
|
gint byte_index, trailing;
|
|
gint line_top;
|
|
GtkTextLineDisplay *display;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (target_iter != NULL);
|
|
|
|
/* Adjust pixels to be on-screen. This gives nice
|
|
behavior if the user is dragging with a pointer grab.
|
|
*/
|
|
if (x < 0)
|
|
x = 0;
|
|
if (x > layout->width)
|
|
x = layout->width;
|
|
|
|
get_line_at_y (layout, y, &line, &line_top);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
x -= display->x_offset;
|
|
y -= line_top + display->top_margin;
|
|
|
|
/* We clamp y to the area of the actual layout so that the layouts
|
|
* hit testing works OK on the space above and below the layout
|
|
*/
|
|
y = CLAMP (y, 0, display->height - display->top_margin - display->bottom_margin - 1);
|
|
|
|
if (!pango_layout_xy_to_index (display->layout, x * PANGO_SCALE, y * PANGO_SCALE,
|
|
&byte_index, &trailing))
|
|
{
|
|
byte_index = gtk_text_line_byte_count (line);
|
|
trailing = 0;
|
|
}
|
|
|
|
line_display_index_to_iter (layout, display, target_iter, byte_index, trailing);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_get_cursor_locations
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @strong_pos: location to store the strong cursor position (may be %NULL)
|
|
* @weak_pos: location to store the weak cursor position (may be %NULL)
|
|
*
|
|
* Given an iterator within a text laout, determine the positions that of the
|
|
* strong and weak cursors if the insertion point is at that
|
|
* iterator. The position of each cursor is stored as a zero-width
|
|
* rectangle. The strong cursor location is the location where
|
|
* characters of the directionality equal to the base direction of the
|
|
* paragraph are inserted. The weak cursor location is the location
|
|
* where characters of the directionality opposite to the base
|
|
* direction of the paragraph are inserted.
|
|
**/
|
|
void
|
|
gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
GdkRectangle *strong_pos,
|
|
GdkRectangle *weak_pos)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_top;
|
|
gint index;
|
|
|
|
PangoRectangle pango_strong_pos;
|
|
PangoRectangle pango_weak_pos;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
index = line_display_iter_to_index (layout, display, iter);
|
|
|
|
line_top = gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
|
|
pango_layout_get_cursor_pos (display->layout, index,
|
|
strong_pos ? &pango_strong_pos : NULL,
|
|
weak_pos ? &pango_weak_pos : NULL);
|
|
|
|
if (strong_pos)
|
|
{
|
|
strong_pos->x = display->x_offset + pango_strong_pos.x / PANGO_SCALE;
|
|
strong_pos->y = line_top + display->top_margin + pango_strong_pos.y / PANGO_SCALE;
|
|
strong_pos->width = 0;
|
|
strong_pos->height = pango_strong_pos.height / PANGO_SCALE;
|
|
}
|
|
|
|
if (weak_pos)
|
|
{
|
|
weak_pos->x = display->x_offset + pango_weak_pos.x / PANGO_SCALE;
|
|
weak_pos->y = line_top + display->top_margin + pango_weak_pos.y / PANGO_SCALE;
|
|
weak_pos->width = 0;
|
|
weak_pos->height = pango_weak_pos.height / PANGO_SCALE;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_get_line_yrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @y: location to store the top of the paragraph in pixels,
|
|
* or %NULL.
|
|
* @height location to store the height of the paragraph in pixels,
|
|
* or %NULL.
|
|
*
|
|
* Find the range of y coordinates for the paragraph containing
|
|
* the given iter.
|
|
**/
|
|
void
|
|
gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
|
|
const GtkTextIter *iter,
|
|
gint *y,
|
|
gint *height)
|
|
{
|
|
GtkTextLine *line;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
|
|
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
|
|
if (y)
|
|
*y = gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
if (height)
|
|
{
|
|
GtkTextLineData *line_data = gtk_text_line_get_data (line, layout);
|
|
if (line_data)
|
|
*height = line_data->height;
|
|
else
|
|
*height = 0;
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_get_iter_location (GtkTextLayout *layout,
|
|
const GtkTextIter *iter,
|
|
GdkRectangle *rect)
|
|
{
|
|
PangoRectangle pango_rect;
|
|
GtkTextLine *line;
|
|
GtkTextBTree *tree;
|
|
GtkTextLineDisplay *display;
|
|
gint byte_index;
|
|
gint x_offset;
|
|
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (gtk_text_iter_get_btree (iter) == _gtk_text_buffer_get_btree (layout->buffer));
|
|
g_return_if_fail (rect != NULL);
|
|
|
|
tree = gtk_text_iter_get_btree (iter);
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
rect->y = gtk_text_btree_find_line_top (tree, line, layout);
|
|
|
|
x_offset = display->x_offset * PANGO_SCALE;
|
|
|
|
byte_index = gtk_text_iter_get_line_index (iter);
|
|
|
|
pango_layout_index_to_pos (display->layout, byte_index, &pango_rect);
|
|
|
|
rect->x = PANGO_PIXELS (x_offset + pango_rect.x);
|
|
rect->y += PANGO_PIXELS (pango_rect.y) + display->top_margin;
|
|
rect->width = PANGO_PIXELS (pango_rect.width);
|
|
rect->height = PANGO_PIXELS (pango_rect.height);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/* FFIXX */
|
|
|
|
/* Find the iter for the logical beginning of the first display line whose
|
|
* top y is >= y. If none exists, move the iter to the logical beginning
|
|
* of the last line in the buffer.
|
|
*/
|
|
static void
|
|
find_display_line_below (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint y)
|
|
{
|
|
GtkTextLine *line, *next;
|
|
GtkTextLine *found_line = NULL;
|
|
gint line_top;
|
|
gint found_byte = 0;
|
|
|
|
line = gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer),
|
|
layout, y, &line_top);
|
|
if (!line)
|
|
{
|
|
line =
|
|
gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1,
|
|
NULL);
|
|
line_top =
|
|
gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer),
|
|
line, layout);
|
|
}
|
|
|
|
while (line && !found_line)
|
|
{
|
|
GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
gint byte_index = 0;
|
|
PangoLayoutIter *layout_iter;
|
|
|
|
layout_iter = pango_layout_get_iter (display->layout);
|
|
|
|
line_top += display->top_margin;
|
|
|
|
do
|
|
{
|
|
gint first_y, last_y;
|
|
PangoLayoutLine *layout_line = pango_layout_iter_get_line (layout_iter);
|
|
|
|
found_byte = byte_index;
|
|
|
|
if (line_top >= y)
|
|
{
|
|
found_line = line;
|
|
break;
|
|
}
|
|
|
|
pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
|
|
line_top += (last_y - first_y) / PANGO_SCALE;
|
|
|
|
byte_index += layout_line->length;
|
|
}
|
|
while (pango_layout_iter_next_line (layout_iter));
|
|
|
|
pango_layout_iter_free (layout_iter);
|
|
|
|
line_top += display->bottom_margin;
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
next = gtk_text_line_next (line);
|
|
if (!next)
|
|
found_line = line;
|
|
|
|
line = next;
|
|
}
|
|
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, found_line, found_byte);
|
|
}
|
|
|
|
/* Find the iter for the logical beginning of the last display line whose
|
|
* top y is >= y. If none exists, move the iter to the logical beginning
|
|
* of the first line in the buffer.
|
|
*/
|
|
static void
|
|
find_display_line_above (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint y)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLine *found_line = NULL;
|
|
gint line_top;
|
|
gint found_byte = 0;
|
|
|
|
line = gtk_text_btree_find_line_by_y (_gtk_text_buffer_get_btree (layout->buffer), layout, y, &line_top);
|
|
if (!line)
|
|
{
|
|
line = gtk_text_btree_get_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
gtk_text_btree_line_count (_gtk_text_buffer_get_btree (layout->buffer)) - 1, NULL);
|
|
line_top = gtk_text_btree_find_line_top (_gtk_text_buffer_get_btree (layout->buffer), line, layout);
|
|
}
|
|
|
|
while (line && !found_line)
|
|
{
|
|
GtkTextLineDisplay *display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
PangoRectangle logical_rect;
|
|
|
|
gint byte_index = 0;
|
|
PangoLayoutIter *layout_iter;
|
|
gint tmp_top;
|
|
|
|
layout_iter = pango_layout_get_iter (display->layout);
|
|
|
|
line_top -= display->top_margin + display->bottom_margin;
|
|
pango_layout_iter_get_layout_extents (layout_iter, NULL, &logical_rect);
|
|
line_top -= logical_rect.height / PANGO_SCALE;
|
|
|
|
tmp_top = line_top + display->top_margin;
|
|
|
|
do
|
|
{
|
|
gint first_y, last_y;
|
|
PangoLayoutLine *layout_line = pango_layout_iter_get_line (layout_iter);
|
|
|
|
found_byte = byte_index;
|
|
|
|
pango_layout_iter_get_line_yrange (layout_iter, &first_y, &last_y);
|
|
|
|
tmp_top -= (last_y - first_y) / PANGO_SCALE;
|
|
|
|
if (tmp_top < y)
|
|
{
|
|
found_line = line;
|
|
found_byte = byte_index;
|
|
goto done;
|
|
}
|
|
|
|
byte_index += layout_line->length;
|
|
}
|
|
while (pango_layout_iter_next_line (layout_iter));
|
|
|
|
pango_layout_iter_free (layout_iter);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
line = gtk_text_line_previous (line);
|
|
}
|
|
|
|
done:
|
|
|
|
if (found_line)
|
|
gtk_text_btree_get_iter_at_line (_gtk_text_buffer_get_btree (layout->buffer),
|
|
iter, found_line, found_byte);
|
|
else
|
|
gtk_text_buffer_get_iter_at_offset (layout->buffer, iter, 0);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_clamp_iter_to_vrange:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @top: the top of the range
|
|
* @bottom: the bottom the range
|
|
*
|
|
* If the iterator is not fully in the range @top <= y < @bottom,
|
|
* then, if possible, move it the minimum distance so that the
|
|
* iterator in this range.
|
|
*
|
|
* Returns: %TRUE if the iterator was moved, otherwise %FALSE.
|
|
**/
|
|
gboolean
|
|
gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint top,
|
|
gint bottom)
|
|
{
|
|
GdkRectangle iter_rect;
|
|
|
|
gtk_text_layout_get_iter_location (layout, iter, &iter_rect);
|
|
|
|
/* If the iter is at least partially above the range, put the iter
|
|
* at the first fully visible line after the range.
|
|
*/
|
|
if (iter_rect.y < top)
|
|
{
|
|
find_display_line_below (layout, iter, top);
|
|
|
|
return TRUE;
|
|
}
|
|
/* Otherwise, if the iter is at least partially below the screen, put the
|
|
* iter on the last logical position of the last completely visible
|
|
* line on screen
|
|
*/
|
|
else if (iter_rect.y + iter_rect.height > bottom)
|
|
{
|
|
find_display_line_above (layout, iter, bottom);
|
|
|
|
return TRUE;
|
|
}
|
|
else
|
|
return FALSE;
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_next_line:
|
|
* @layout: a #GtkLayout
|
|
* @iter: a #GtkTextIter
|
|
*
|
|
* Move the iterator to the beginning of the previous line. The lines
|
|
* of a wrapped paragraph are treated as distinct for this operation.
|
|
**/
|
|
void
|
|
gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
|
|
GtkTextIter *iter)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
GSList *tmp_list;
|
|
PangoLayoutLine *layout_line;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
tmp_list = pango_layout_get_lines (display->layout);
|
|
layout_line = tmp_list->data;
|
|
|
|
if (line_byte < layout_line->length || !tmp_list->next) /* first line of paragraph */
|
|
{
|
|
GtkTextLine *prev_line = gtk_text_line_previous (line);
|
|
|
|
if (prev_line)
|
|
{
|
|
gint byte_offset = 0;
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
display = gtk_text_layout_get_line_display (layout, prev_line, FALSE);
|
|
|
|
tmp_list = pango_layout_get_lines (display->layout);
|
|
|
|
while (tmp_list->next)
|
|
{
|
|
layout_line = tmp_list->data;
|
|
tmp_list = tmp_list->next;
|
|
|
|
byte_offset += layout_line->length;
|
|
}
|
|
|
|
line_display_index_to_iter (layout, display, iter, byte_offset, 0);
|
|
}
|
|
else
|
|
line_display_index_to_iter (layout, display, iter, 0, 0);
|
|
}
|
|
else
|
|
{
|
|
gint prev_offset = 0;
|
|
gint byte_offset = layout_line->length;
|
|
|
|
tmp_list = tmp_list->next;
|
|
while (tmp_list)
|
|
{
|
|
layout_line = tmp_list->data;
|
|
|
|
if (line_byte < byte_offset + layout_line->length || !tmp_list->next)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter, prev_offset, 0);
|
|
break;
|
|
}
|
|
|
|
prev_offset = byte_offset;
|
|
byte_offset += layout_line->length;
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_next_line:
|
|
* @layout: a #GtkLayout
|
|
* @iter: a #GtkTextIter
|
|
*
|
|
* Move the iterator to the beginning of the next line. The
|
|
* lines of a wrapped paragraph are treated as distinct for
|
|
* this operation.
|
|
**/
|
|
void
|
|
gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
|
|
GtkTextIter *iter)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
|
|
gboolean found = FALSE;
|
|
gboolean found_after = FALSE;
|
|
gboolean first = TRUE;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
|
|
while (line && !found_after)
|
|
{
|
|
gint byte_offset = 0;
|
|
GSList *tmp_list;
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
|
|
if (first)
|
|
{
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
first = FALSE;
|
|
}
|
|
else
|
|
line_byte = 0;
|
|
|
|
tmp_list = pango_layout_get_lines (display->layout);
|
|
while (tmp_list && !found_after)
|
|
{
|
|
PangoLayoutLine *layout_line = tmp_list->data;
|
|
|
|
if (found)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter, byte_offset, 0);
|
|
found_after = TRUE;
|
|
}
|
|
else if (line_byte < byte_offset + layout_line->length || !tmp_list->next)
|
|
found = TRUE;
|
|
|
|
byte_offset += layout_line->length;
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
|
|
line = gtk_text_line_next (line);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_line_end:
|
|
* @layout: a #GtkTextLayout
|
|
* @direction: if negative, move to beginning of line, otherwise
|
|
move to end of line.
|
|
*
|
|
* Move to the beginning or end of a display line.
|
|
**/
|
|
void
|
|
gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint direction)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
gint byte_offset = 0;
|
|
GSList *tmp_list;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
tmp_list = pango_layout_get_lines (display->layout);
|
|
while (tmp_list)
|
|
{
|
|
PangoLayoutLine *layout_line = tmp_list->data;
|
|
|
|
if (line_byte < byte_offset + layout_line->length || !tmp_list->next)
|
|
{
|
|
line_display_index_to_iter (layout, display, iter,
|
|
direction < 0 ? byte_offset : byte_offset + layout_line->length,
|
|
0);
|
|
|
|
/* FIXME: As a bad hack, we move back one position to avoid going
|
|
* to next line on a forced break not at whitespace. Real fix
|
|
* is to keep track of whether marks are at leading or trailing edge?
|
|
*/
|
|
if (direction > 0 && layout_line->length > 0)
|
|
gtk_text_iter_prev_char (iter);
|
|
|
|
break;
|
|
}
|
|
|
|
byte_offset += layout_line->length;
|
|
tmp_list = tmp_list->next;
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_to_x:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @x: X coordinate
|
|
*
|
|
* Keeping the iterator on the same line of the layout, move it to the
|
|
* specified X coordinate. The lines of a wrapped paragraph are
|
|
* treated as distinct for this operation.
|
|
**/
|
|
void
|
|
gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint x)
|
|
{
|
|
GtkTextLine *line;
|
|
GtkTextLineDisplay *display;
|
|
gint line_byte;
|
|
gint byte_offset = 0;
|
|
PangoLayoutIter *layout_iter;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (GTK_IS_TEXT_LAYOUT (layout));
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
line = gtk_text_iter_get_text_line (iter);
|
|
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
layout_iter = pango_layout_get_iter (display->layout);
|
|
|
|
do
|
|
{
|
|
PangoLayoutLine *layout_line = pango_layout_iter_get_line (layout_iter);
|
|
|
|
if (line_byte < byte_offset + layout_line->length ||
|
|
pango_layout_iter_at_last_line (layout_iter))
|
|
{
|
|
PangoRectangle logical_rect;
|
|
gint byte_index, trailing;
|
|
gint x_offset = display->x_offset * PANGO_SCALE;
|
|
|
|
pango_layout_iter_get_line_extents (layout_iter, NULL, &logical_rect);
|
|
|
|
pango_layout_line_x_to_index (layout_line,
|
|
x * PANGO_SCALE - x_offset - logical_rect.x,
|
|
&byte_index, &trailing);
|
|
|
|
line_display_index_to_iter (layout, display, iter, byte_index, trailing);
|
|
|
|
break;
|
|
}
|
|
|
|
byte_offset += layout_line->length;
|
|
}
|
|
while (pango_layout_iter_next_line (layout_iter));
|
|
|
|
pango_layout_iter_free (layout_iter);
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
/**
|
|
* gtk_text_layout_move_iter_visually:
|
|
* @layout: a #GtkTextLayout
|
|
* @iter: a #GtkTextIter
|
|
* @count: number of characters to move (negative moves left, positive moves right)
|
|
*
|
|
* Move the iterator a given number of characters visually, treating
|
|
* it as the strong cursor position. If @count is positive, then the
|
|
* new strong cursor position will be @count positions to the right of
|
|
* the old cursor position. If @count is negative then the new strong
|
|
* cursor position will be @count positions to the left of the old
|
|
* cursor position.
|
|
*
|
|
* In the presence of bidirection text, the correspondence
|
|
* between logical and visual order will depend on the direction
|
|
* of the current run, and there may be jumps when the cursor
|
|
* is moved off of the end of a run.
|
|
**/
|
|
|
|
void
|
|
gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
|
|
GtkTextIter *iter,
|
|
gint count)
|
|
{
|
|
GtkTextLineDisplay *display = NULL;
|
|
|
|
g_return_if_fail (layout != NULL);
|
|
g_return_if_fail (iter != NULL);
|
|
|
|
while (count != 0)
|
|
{
|
|
GtkTextLine *line = gtk_text_iter_get_text_line (iter);
|
|
gint line_byte;
|
|
gint extra_back = 0;
|
|
|
|
int byte_count = gtk_text_line_byte_count (line);
|
|
|
|
int new_index;
|
|
int new_trailing;
|
|
|
|
|
|
if (!display)
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
line_byte = line_display_iter_to_index (layout, display, iter);
|
|
|
|
if (count > 0)
|
|
{
|
|
pango_layout_move_cursor_visually (display->layout, line_byte, 0, 1, &new_index, &new_trailing);
|
|
count--;
|
|
}
|
|
else
|
|
{
|
|
pango_layout_move_cursor_visually (display->layout, line_byte, 0, -1, &new_index, &new_trailing);
|
|
count++;
|
|
}
|
|
|
|
/* We need to handle the preedit string specially. Well, we don't really need to
|
|
* handle it specially, since hopefully calling gtk_im_context_reset() will
|
|
* remove the preedit string; but if we start off in front of the preedit
|
|
* string (logically) and end up in or on the back edge of the preedit string,
|
|
* we should move the iter one place farther.
|
|
*/
|
|
if (layout->preedit_len > 0 && display->insert_index >= 0)
|
|
{
|
|
if (line_byte == display->insert_index + layout->preedit_len &&
|
|
new_index < display->insert_index + layout->preedit_len)
|
|
{
|
|
line_byte = display->insert_index;
|
|
extra_back = 1;
|
|
}
|
|
}
|
|
|
|
if (new_index < 0 || (new_index == 0 && extra_back))
|
|
{
|
|
line = gtk_text_line_previous (line);
|
|
|
|
if (!line)
|
|
return;
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
new_index = gtk_text_line_byte_count (line);
|
|
}
|
|
else if (new_index > byte_count)
|
|
{
|
|
line = gtk_text_line_next (line);
|
|
if (!line)
|
|
return;
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
display = gtk_text_layout_get_line_display (layout, line, FALSE);
|
|
new_index = 0;
|
|
}
|
|
|
|
line_display_index_to_iter (layout, display, iter, new_index, new_trailing);
|
|
if (extra_back)
|
|
gtk_text_iter_prev_char (iter);
|
|
}
|
|
|
|
gtk_text_layout_free_line_display (layout, display);
|
|
}
|
|
|
|
void
|
|
gtk_text_layout_spew (GtkTextLayout *layout)
|
|
{
|
|
#if 0
|
|
GtkTextDisplayLine *iter;
|
|
guint wrapped = 0;
|
|
guint paragraphs = 0;
|
|
GtkTextLine *last_line = NULL;
|
|
|
|
iter = layout->line_list;
|
|
while (iter != NULL)
|
|
{
|
|
if (iter->line != last_line)
|
|
{
|
|
printf ("%5u paragraph (%p)\n", paragraphs, iter->line);
|
|
++paragraphs;
|
|
last_line = iter->line;
|
|
}
|
|
|
|
printf (" %5u y: %d len: %d start: %d bytes: %d\n",
|
|
wrapped, iter->y, iter->length, iter->byte_offset,
|
|
iter->byte_count);
|
|
|
|
++wrapped;
|
|
iter = iter->next;
|
|
}
|
|
|
|
printf ("Layout %s recompute\n",
|
|
layout->need_recompute ? "needs" : "doesn't need");
|
|
|
|
printf ("Layout pars: %u lines: %u size: %d x %d Screen width: %d\n",
|
|
paragraphs, wrapped, layout->width,
|
|
layout->height, layout->screen_width);
|
|
#endif
|
|
}
|