/* GTK - The GIMP Toolkit
* gtktextlayout.h
*
* Copyright (c) 1992-1994 The Regents of the University of California.
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
* Copyright (c) 2000 Red Hat, Inc.
* Tk->Gtk port by Havoc Pennington
* Pango support by Owen Taylor
*
* This file can be used under your choice of two licenses, the LGPL
* and the original Tk license.
*
* LGPL:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see .
*
* Original Tk license:
*
* This software is copyrighted by the Regents of the University of
* California, Sun Microsystems, Inc., and other parties. The
* following terms apply to all files associated with the software
* unless explicitly disclaimed in individual files.
*
* The authors hereby grant permission to use, copy, modify,
* distribute, and license this software and its documentation for any
* purpose, provided that existing copyright notices are retained in
* all copies and that this notice is included verbatim in any
* distributions. No written agreement, license, or royalty fee is
* required for any of the authorized uses. Modifications to this
* software may be copyrighted by their authors and need not follow
* the licensing terms described here, provided that the new terms are
* clearly indicated on the first page of each file where they apply.
*
* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*
* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
*
* GOVERNMENT USE: If you are acquiring this software on behalf of the
* U.S. government, the Government shall have only "Restricted Rights"
* in the software and related documentation as defined in the Federal
* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
* are acquiring the software on behalf of the Department of Defense,
* the software shall be classified as "Commercial Computer Software"
* and the Government shall have only "Restricted Rights" as defined
* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
* foregoing, the authors grant the U.S. Government and others acting
* in its behalf permission to use and distribute the software in
* accordance with the terms specified in this license.
*
*/
/*
* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#ifndef __GTK_TEXT_LAYOUT_PRIVATE_H__
#define __GTK_TEXT_LAYOUT_PRIVATE_H__
#include
#include
G_BEGIN_DECLS
/* forward declarations that have to be here to avoid including
* gtktextbtree.h
*/
typedef struct _GtkTextLine GtkTextLine;
typedef struct _GtkTextLineData GtkTextLineData;
#define GTK_TYPE_TEXT_LAYOUT (gtk_text_layout_get_type ())
#define GTK_TEXT_LAYOUT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_TEXT_LAYOUT, GtkTextLayout))
#define GTK_TEXT_LAYOUT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_TEXT_LAYOUT, GtkTextLayoutClass))
#define GTK_IS_TEXT_LAYOUT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_TEXT_LAYOUT))
#define GTK_IS_TEXT_LAYOUT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_TEXT_LAYOUT))
#define GTK_TEXT_LAYOUT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_TEXT_LAYOUT, GtkTextLayoutClass))
typedef struct _GtkTextLayout GtkTextLayout;
typedef struct _GtkTextLayoutClass GtkTextLayoutClass;
typedef struct _GtkTextLineDisplay GtkTextLineDisplay;
typedef struct _GtkTextAttrAppearance GtkTextAttrAppearance;
struct _GtkTextLayout
{
GObject parent_instance;
/* width of the display area on-screen,
* i.e. pixels we should wrap to fit inside. */
int screen_width;
/* width/height of the total logical area being laid out */
int width;
int height;
/* Pixel offsets from the left and from the top to be used when we
* draw; these allow us to create left/top margins. We don't need
* anything special for bottom/right margins, because those don't
* affect drawing.
*/
/* int left_edge; */
/* int top_edge; */
GtkTextBuffer *buffer;
int left_padding;
int right_padding;
/* Default style used if no tags override it */
GtkTextAttributes *default_style;
/* Pango contexts used for creating layouts */
PangoContext *ltr_context;
PangoContext *rtl_context;
/* A cache of one style; this is used to ensure
* we don't constantly regenerate the style
* over long runs with the same style. */
GtkTextAttributes *one_style_cache;
/* Whether we are allowed to wrap right now */
int wrap_loop_count;
/* Whether to show the insertion cursor */
guint cursor_visible : 1;
/* For what GtkTextDirection to draw cursor GTK_TEXT_DIR_NONE -
* means draw both cursors.
*/
guint cursor_direction : 2;
/* The keyboard direction is used to default the alignment when
there are no strong characters.
*/
guint keyboard_direction : 2;
guint overwrite_mode : 1;
/* The preedit string and attributes, if any */
char *preedit_string;
PangoAttrList *preedit_attrs;
int preedit_len;
int preedit_cursor;
};
struct _GtkTextLayoutClass
{
GObjectClass parent_class;
};
struct _GtkTextAttrAppearance
{
PangoAttribute attr;
GtkTextAppearance appearance;
};
typedef struct _CursorPosition CursorPosition;
struct _CursorPosition {
int pos;
guint is_insert : 1;
guint is_selection_bound : 1;
};
struct _GtkTextLineDisplay
{
PangoLayout *layout;
GskRenderNode *node;
GArray *cursors; /* indexes of cursors in the PangoLayout, and mark names */
/* GSequenceIter backpointer for use within cache */
GSequenceIter *cache_iter;
/* GQueue link for use in MRU to help cull cache */
GList mru_link;
GtkTextDirection direction;
int width; /* Width of layout */
int total_width; /* width - margins, if no width set on layout, if width set on layout, -1 */
int height;
/* Amount layout is shifted from left edge - this is the left margin
* plus any other factors, such as alignment or indentation.
*/
int x_offset;
int left_margin;
int right_margin;
int top_margin;
int bottom_margin;
int insert_index; /* Byte index of insert cursor within para or -1 */
GtkTextLine *line;
GdkRectangle block_cursor;
guint cursors_invalid : 1;
guint has_block_cursor : 1;
guint cursor_at_line_end : 1;
guint size_only : 1;
guint pg_bg_rgba_set : 1;
guint has_children : 1;
GdkRGBA pg_bg_rgba;
};
#ifdef GTK_COMPILATION
extern G_GNUC_INTERNAL PangoAttrType gtk_text_attr_appearance_type;
#endif
GType gtk_text_layout_get_type (void) G_GNUC_CONST;
GtkTextLayout* gtk_text_layout_new (void);
void gtk_text_layout_set_buffer (GtkTextLayout *layout,
GtkTextBuffer *buffer);
GtkTextBuffer *gtk_text_layout_get_buffer (GtkTextLayout *layout);
void gtk_text_layout_set_default_style (GtkTextLayout *layout,
GtkTextAttributes *values);
void gtk_text_layout_set_contexts (GtkTextLayout *layout,
PangoContext *ltr_context,
PangoContext *rtl_context);
void gtk_text_layout_set_cursor_direction (GtkTextLayout *layout,
GtkTextDirection direction);
void gtk_text_layout_set_overwrite_mode (GtkTextLayout *layout,
gboolean overwrite);
void gtk_text_layout_set_keyboard_direction (GtkTextLayout *layout,
GtkTextDirection keyboard_dir);
void gtk_text_layout_default_style_changed (GtkTextLayout *layout);
void gtk_text_layout_set_screen_width (GtkTextLayout *layout,
int width);
void gtk_text_layout_set_preedit_string (GtkTextLayout *layout,
const char *preedit_string,
PangoAttrList *preedit_attrs,
int cursor_pos);
void gtk_text_layout_set_cursor_visible (GtkTextLayout *layout,
gboolean cursor_visible);
gboolean gtk_text_layout_get_cursor_visible (GtkTextLayout *layout);
void gtk_text_layout_get_size (GtkTextLayout *layout,
int *width,
int *height);
GSList* gtk_text_layout_get_lines (GtkTextLayout *layout,
int top_y,
int bottom_y,
int *first_line_y);
void gtk_text_layout_wrap_loop_start (GtkTextLayout *layout);
void gtk_text_layout_wrap_loop_end (GtkTextLayout *layout);
GtkTextLineDisplay* gtk_text_layout_get_line_display (GtkTextLayout *layout,
GtkTextLine *line,
gboolean size_only);
GtkTextLineDisplay *gtk_text_line_display_ref (GtkTextLineDisplay *display);
void gtk_text_line_display_unref (GtkTextLineDisplay *display);
int gtk_text_line_display_compare (const GtkTextLineDisplay *display1,
const GtkTextLineDisplay *display2,
GtkTextLayout *layout);
void gtk_text_layout_get_line_at_y (GtkTextLayout *layout,
GtkTextIter *target_iter,
int y,
int *line_top);
gboolean gtk_text_layout_get_iter_at_pixel (GtkTextLayout *layout,
GtkTextIter *iter,
int x,
int y);
gboolean gtk_text_layout_get_iter_at_position (GtkTextLayout *layout,
GtkTextIter *iter,
int *trailing,
int x,
int y);
void gtk_text_layout_invalidate (GtkTextLayout *layout,
const GtkTextIter *start,
const GtkTextIter *end);
void gtk_text_layout_invalidate_cursors(GtkTextLayout *layout,
const GtkTextIter *start,
const GtkTextIter *end);
void gtk_text_layout_free_line_data (GtkTextLayout *layout,
GtkTextLine *line,
GtkTextLineData *line_data);
gboolean gtk_text_layout_is_valid (GtkTextLayout *layout);
void gtk_text_layout_validate_yrange (GtkTextLayout *layout,
GtkTextIter *anchor_line,
int y0_,
int y1_);
void gtk_text_layout_validate (GtkTextLayout *layout,
int max_pixels);
GtkTextLineData* gtk_text_layout_wrap (GtkTextLayout *layout,
GtkTextLine *line,
GtkTextLineData *line_data);
void gtk_text_layout_changed (GtkTextLayout *layout,
int y,
int old_height,
int new_height);
void gtk_text_layout_cursors_changed (GtkTextLayout *layout,
int y,
int old_height,
int new_height);
void gtk_text_layout_get_iter_location (GtkTextLayout *layout,
const GtkTextIter *iter,
GdkRectangle *rect);
void gtk_text_layout_get_line_yrange (GtkTextLayout *layout,
const GtkTextIter *iter,
int *y,
int *height);
void gtk_text_layout_get_cursor_locations (GtkTextLayout *layout,
GtkTextIter *iter,
GdkRectangle *strong_pos,
GdkRectangle *weak_pos);
GtkTextLineDisplay *gtk_text_layout_create_display (GtkTextLayout *layout,
GtkTextLine *line,
gboolean size_only);
void gtk_text_layout_update_display_cursors (GtkTextLayout *layout,
GtkTextLine *line,
GtkTextLineDisplay *display);
void gtk_text_layout_update_children (GtkTextLayout *layout,
GtkTextLineDisplay *display);
gboolean _gtk_text_layout_get_block_cursor (GtkTextLayout *layout,
GdkRectangle *pos);
gboolean gtk_text_layout_clamp_iter_to_vrange (GtkTextLayout *layout,
GtkTextIter *iter,
int top,
int bottom);
gboolean gtk_text_layout_move_iter_to_line_end (GtkTextLayout *layout,
GtkTextIter *iter,
int direction);
gboolean gtk_text_layout_move_iter_to_previous_line (GtkTextLayout *layout,
GtkTextIter *iter);
gboolean gtk_text_layout_move_iter_to_next_line (GtkTextLayout *layout,
GtkTextIter *iter);
void gtk_text_layout_move_iter_to_x (GtkTextLayout *layout,
GtkTextIter *iter,
int x);
gboolean gtk_text_layout_move_iter_visually (GtkTextLayout *layout,
GtkTextIter *iter,
int count);
gboolean gtk_text_layout_iter_starts_line (GtkTextLayout *layout,
const GtkTextIter *iter);
void gtk_text_layout_get_iter_at_line (GtkTextLayout *layout,
GtkTextIter *iter,
GtkTextLine *line,
int byte_offset);
void gtk_text_child_anchor_register_child (GtkTextChildAnchor *anchor,
GtkWidget *child,
GtkTextLayout *layout);
void gtk_text_child_anchor_unregister_child (GtkTextChildAnchor *anchor,
GtkWidget *child);
void gtk_text_child_anchor_queue_resize (GtkTextChildAnchor *anchor,
GtkTextLayout *layout);
void gtk_text_anchored_child_set_layout (GtkWidget *child,
GtkTextLayout *layout);
void gtk_text_layout_spew (GtkTextLayout *layout);
void gtk_text_layout_snapshot (GtkTextLayout *layout,
GtkWidget *widget,
GtkSnapshot *snapshot,
const GdkRectangle *clip,
float cursor_alpha);
void gtk_text_layout_set_mru_size (GtkTextLayout *layout,
guint mru_size);
G_END_DECLS
#endif /* __GTK_TEXT_LAYOUT_PRIVATE_H__ */