atk/atktext.h

   1 /* ATK - The Accessibility Toolkit for GTK+
   2  * Copyright 2001 Sun Microsystems Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20
  21 #ifndef __ATK_TEXT_H__
  22 #define __ATK_TEXT_H__
  23
  24 #include <pango/pango.h>
  25 #include <glib-object.h>
  26 #include <atk/atkobject.h>
  27
  28 #ifdef __cplusplus
  29 extern "C" {
  30 #endif /* __cplusplus */
  31
  32 typedef GSList AtkAttributeSet;
  33
  34 typedef struct _AtkAttribute {
  35   gchar* name;
  36   gchar* value;
  37 }AtkAttribute;
  38
  39 #define ATK_TYPE_TEXT                    (atk_text_get_type ())
  40 #define ATK_IS_TEXT(obj)                 G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_TEXT)
  41 #define ATK_TEXT(obj)                    G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_TEXT, AtkText)
  42 #define ATK_TEXT_GET_IFACE(obj)          (G_TYPE_INSTANCE_GET_INTERFACE ((obj), ATK_TYPE_TEXT, AtkTextIface))
  43
  44 #ifndef _TYPEDEF_ATK_TEXT_
  45 #define _TYPEDEF_ATK_TEXT_
  46 typedef struct _AtkText AtkText;
  47 #endif
  48 typedef struct _AtkTextIface AtkTextIface;
  49
  50
  51 /**
  52  *AtkXYCoords:
  53  *@ATK_XY_SCREEN: specifies xy coordinates relative to the screen
  54  *@ATK_XY_WINDOW: specifies xy coordinates relative to the widgets
  55  * top-level window
  56  *
  57  *Specifies how xy coordinates are to be interpreted
  58  **/
  59 typedef enum {
  60   ATK_XY_SCREEN,
  61   ATK_XY_WINDOW
  62 }AtkXYCoords;
  63
  64 /**
  65  *AtkTextBoundary:
  66  *@ATK_TEXT_BOUNDARY_CHAR:
  67  *@ATK_TEXT_BOUNDARY_WORD_START:
  68  *@ATK_TEXT_BOUNDARY_WORD_END:
  69  *@ATK_TEXT_BOUNDARY_SENTENCE_START:
  70  *@ATK_TEXT_BOUNDARY_SENTENCE_END:
  71  *@ATK_TEXT_BOUNDARY_LINE_START:
  72  *@ATK_TEXT_BOUNDARY_LINE_END:
  73  *
  74  *Text boundary types used for specifying boundaries for regions of text
  75  **/
  76 typedef enum {
  77   ATK_TEXT_BOUNDARY_CHAR,
  78   ATK_TEXT_BOUNDARY_WORD_START,
  79   ATK_TEXT_BOUNDARY_WORD_END,
  80   ATK_TEXT_BOUNDARY_SENTENCE_START,
  81   ATK_TEXT_BOUNDARY_SENTENCE_END,
  82   ATK_TEXT_BOUNDARY_LINE_START,
  83   ATK_TEXT_BOUNDARY_LINE_END
  84 } AtkTextBoundary;
  85
  86 struct _AtkTextIface
  87 {
  88   GTypeInterface parent;
  89
  90   gchar*         (* get_text)                     (AtkText          *text,
  91                                                    gint             start_offset,
  92                                                    gint             end_offset);
  93   gchar*         (* get_text_after_offset)        (AtkText          *text,
  94                                                    gint             offset,
  95                                                    AtkTextBoundary  boundary_type,
  96                                                    gint             *startOffset,
  97                                                    gint             *endOffset);
  98   gchar*         (* get_text_at_offset)           (AtkText          *text,
  99                                                    gint             offset,
 100                                                    AtkTextBoundary  boundary_type,
 101                                                    gint             *startOffset,
 102                                                    gint             *endOffset);
 103   gunichar       (* get_character_at_offset)      (AtkText          *text,
 104                                                    gint             offset);
 105   gchar*         (* get_text_before_offset)       (AtkText          *text,
 106                                                    gint             offset,
 107                                                    AtkTextBoundary  boundary_type,
 108                                                    gint             *startOffset,
 109                                                    gint             *endOffset);
 110   gint           (* get_caret_offset)             (AtkText          *text);
 111   AtkAttributeSet* (* ref_run_attributes)         (AtkText          *text,
 112                                                    gint             offset,
 113                                                    gint             *start_offset,
 114                                                    gint             *end_offset);
 115   void           (* get_character_extents)        (AtkText          *text,
 116                                                    gint             offset,
 117                                                    gint             *x,
 118                                                    gint             *y,
 119                                                    gint             *length,
 120                                                    gint             *width,
 121                                                    AtkXYCoords      coords);
 122   gint           (* get_character_count)          (AtkText          *text);
 123   gint           (* get_offset_at_point)          (AtkText          *text,
 124                                                    gint             x,
 125                                                    gint             y,
 126                                                    AtkXYCoords      coords);
 127   gint           (* get_n_selections)             (AtkText          *text);
 128   gchar*         (* get_selection)                (AtkText          *text,
 129                                                    gint             selection_num,
 130                                                    gint             *start_offset,
 131                                                    gint             *end_offset);
 132   gboolean       (* add_selection)                (AtkText          *text,
 133                                                    gint             start_offset,
 134                                                    gint             end_offset);
 135   gboolean       (* remove_selection)             (AtkText          *text,
 136                                                    gint             selection_num);
 137   gboolean       (* set_selection)                (AtkText          *text,
 138                                                    gint             selection_num,
 139                                                    gint             start_offset,
 140                                                    gint             end_offset);
 141   gboolean       (* set_caret_offset)             (AtkText          *text,
 142                                                    gint             offset);
 143   void           (* text_changed)                 (AtkText          *text);
 144   void           (* caret_changed)                (AtkText          *text,
 145                                                    gint             location);
 146 };
 147 GType            atk_text_get_type (void);
 148
 149
 150 /*
 151  * Additional AtkObject properties used by AtkText:
 152  *    "accessible_text" (accessible text has changed)
 153  *    "accessible_caret" (accessible text cursor position changed:
 154  *                         editable text only)
 155  */
 156
 157 gchar*        atk_text_get_text                           (AtkText          *text,
 158                                                            gint             start_offset,
 159                                                            gint             end_offset);
 160 gunichar      atk_text_get_character_at_offset            (AtkText          *text,
 161                                                            gint             offset);
 162 gchar*        atk_text_get_text_after_offset              (AtkText          *text,
 163                                                            gint             offset,
 164                                                            AtkTextBoundary  boundary_type,
 165                                                            gint             *startOffset,
 166                                                            gint             *endOffset);
 167 gchar*        atk_text_get_text_at_offset                 (AtkText          *text,
 168                                                            gint             offset,
 169                                                            AtkTextBoundary  boundary_type,
 170                                                            gint             *startOffset,
 171                                                            gint             *endOffset);
 172 gchar*        atk_text_get_text_before_offset             (AtkText          *text,
 173                                                            gint             offset,
 174                                                            AtkTextBoundary  boundary_type,
 175                                                            gint             *startOffset,
 176                                                            gint             *endOffset);
 177 gint          atk_text_get_caret_offset                   (AtkText          *text);
 178 void          atk_text_get_character_extents              (AtkText          *text,
 179                                                            gint             offset,
 180                                                            gint             *x,
 181                                                            gint             *y,
 182                                                            gint             *length,
 183                                                            gint             *width,
 184                                                            AtkXYCoords      coords);
 185 AtkAttributeSet* atk_text_ref_run_attributes              (AtkText          *text,
 186                                                            gint             offset,
 187                                                            gint             *start_offset,
 188                                                            gint             *end_offset);
 189 gint          atk_text_get_character_count                (AtkText          *text);
 190 gint          atk_text_get_offset_at_point                (AtkText          *text,
 191                                                            gint             x,
 192                                                            gint             y,
 193                                                            AtkXYCoords      coords);
 194 gint          atk_text_get_n_selections                   (AtkText          *text);
 195 gchar*        atk_text_get_selection                      (AtkText          *text,
 196                                                            gint             selection_num,
 197                                                            gint             *start_offset,
 198                                                            gint             *end_offset);
 199 gboolean      atk_text_add_selection                      (AtkText          *text,
 200                                                            gint             start_offset,
 201                                                            gint             end_offset);
 202 gboolean      atk_text_remove_selection                   (AtkText          *text,
 203                                                            gint             selection_num);
 204 gboolean      atk_text_set_selection                      (AtkText          *text,
 205                                                            gint             selection_num,
 206                                                            gint             start_offset,
 207                                                            gint             end_offset);
 208 gboolean      atk_text_set_caret_offset                   (AtkText          *text,
 209                                                            gint             offset);
 210 void          AtkAttributeSet_free                        (AtkAttributeSet  *attrib_set);
 211
 212 #ifdef __cplusplus
 213 }
 214 #endif /* __cplusplus */
 215
 216
 217 #endif /* __ATK_TEXT_H__ */