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 #if defined(ATK_DISABLE_SINGLE_INCLUDES) && !defined (__ATK_H_INSIDE__) && !defined (ATK_COMPILATION)
  21 #error "Only <atk/atk.h> can be included directly."
  22 #endif
  23
  24 #ifndef __ATK_TEXT_H__
  25 #define __ATK_TEXT_H__
  26
  27 #include <glib-object.h>
  28 #include <atk/atkobject.h>
  29 #include <atk/atkutil.h>
  30
  31 G_BEGIN_DECLS
  32
  33 /**
  34  *AtkTextAttribute
  35  *@ATK_TEXT_ATTR_INVALID: Invalid attribute
  36  *@ATK_TEXT_ATTR_LEFT_MARGIN: The pixel width of the left margin
  37  *@ATK_TEXT_ATTR_RIGHT_MARGIN: The pixel width of the right margin
  38  *@ATK_TEXT_ATTR_INDENT: The number of pixels that the text is indented
  39  *@ATK_TEXT_ATTR_INVISIBLE: Either "true" or "false" indicating whether text is visible or not
  40  *@ATK_TEXT_ATTR_EDITABLE: Either "true" or "false" indicating whether text is editable or not
  41  *@ATK_TEXT_ATTR_PIXELS_ABOVE_LINES: Pixels of blank space to leave above each newline-terminated line.
  42  *@ATK_TEXT_ATTR_PIXELS_BELOW_LINES: Pixels of blank space to leave below each newline-terminated line.
  43  *@ATK_TEXT_ATTR_PIXELS_INSIDE_WRAP: Pixels of blank space to leave between wrapped lines inside the same newline-terminated line (paragraph).
  44  *@ATK_TEXT_ATTR_BG_FULL_HEIGHT: "true" or "false" whether to make the background color for each character the height of the highest font used on the current line, or the height of the font used for the current character.
  45  *@ATK_TEXT_ATTR_RISE: Number of pixels that the characters are risen above the baseline
  46  *@ATK_TEXT_ATTR_UNDERLINE: "none", "single", "double", "low", or "error"
  47  *@ATK_TEXT_ATTR_STRIKETHROUGH: "true" or "false" whether the text is strikethrough
  48  *@ATK_TEXT_ATTR_SIZE: The size of the characters.
  49  *@ATK_TEXT_ATTR_SCALE: The scale of the characters. The value is a string representation of a double
  50  *@ATK_TEXT_ATTR_WEIGHT: The weight of the characters.
  51  *@ATK_TEXT_ATTR_LANGUAGE: The language used
  52  *@ATK_TEXT_ATTR_FAMILY_NAME: The font family name
  53  *@ATK_TEXT_ATTR_BG_COLOR: The background color. The value is an RGB value of the format "%u,%u,%u"
  54  *@ATK_TEXT_ATTR_FG_COLOR:The foreground color. The value is an RGB value of the format "%u,%u,%u"
  55  *@ATK_TEXT_ATTR_BG_STIPPLE: "true" if a #GdkBitmap is set for stippling the background color.
  56  *@ATK_TEXT_ATTR_FG_STIPPLE: "true" if a #GdkBitmap is set for stippling the foreground color.
  57  *@ATK_TEXT_ATTR_WRAP_MODE: The wrap mode of the text, if any. Values are "none", "char", "word", or "word_char".
  58  *@ATK_TEXT_ATTR_DIRECTION: The direction of the text, if set. Values are "none", "ltr" or "rtl"
  59  *@ATK_TEXT_ATTR_JUSTIFICATION: The justification of the text, if set. Values are "left", "right", "center" or "fill"
  60  *@ATK_TEXT_ATTR_STRETCH: The stretch of the text, if set. Values are "ultra_condensed", "extra_condensed", "condensed", "semi_condensed", "normal", "semi_expanded", "expanded", "extra_expanded" or "ultra_expanded"
  61  *@ATK_TEXT_ATTR_VARIANT: The capitalization variant of the text, if set. Values are "normal" or "small_caps"
  62  *@ATK_TEXT_ATTR_STYLE: The slant style of the text, if set. Values are "normal", "oblique" or "italic"
  63  *@ATK_TEXT_ATTR_LAST_DEFINED: not a valid text attribute, used for finding end of enumeration
  64  *
  65  * Describes the text attributes supported
  66  **/
  67 typedef enum
  68 {
  69   ATK_TEXT_ATTR_INVALID = 0,
  70   ATK_TEXT_ATTR_LEFT_MARGIN,
  71   ATK_TEXT_ATTR_RIGHT_MARGIN,
  72   ATK_TEXT_ATTR_INDENT,
  73   ATK_TEXT_ATTR_INVISIBLE,
  74   ATK_TEXT_ATTR_EDITABLE,
  75   ATK_TEXT_ATTR_PIXELS_ABOVE_LINES,
  76   ATK_TEXT_ATTR_PIXELS_BELOW_LINES,
  77   ATK_TEXT_ATTR_PIXELS_INSIDE_WRAP,
  78   ATK_TEXT_ATTR_BG_FULL_HEIGHT,
  79   ATK_TEXT_ATTR_RISE,
  80   ATK_TEXT_ATTR_UNDERLINE,
  81   ATK_TEXT_ATTR_STRIKETHROUGH,
  82   ATK_TEXT_ATTR_SIZE,
  83   ATK_TEXT_ATTR_SCALE,
  84   ATK_TEXT_ATTR_WEIGHT,
  85   ATK_TEXT_ATTR_LANGUAGE,
  86   ATK_TEXT_ATTR_FAMILY_NAME,
  87   ATK_TEXT_ATTR_BG_COLOR,
  88   ATK_TEXT_ATTR_FG_COLOR,
  89   ATK_TEXT_ATTR_BG_STIPPLE,
  90   ATK_TEXT_ATTR_FG_STIPPLE,
  91   ATK_TEXT_ATTR_WRAP_MODE,
  92   ATK_TEXT_ATTR_DIRECTION,
  93   ATK_TEXT_ATTR_JUSTIFICATION,
  94   ATK_TEXT_ATTR_STRETCH,
  95   ATK_TEXT_ATTR_VARIANT,
  96   ATK_TEXT_ATTR_STYLE,
  97   ATK_TEXT_ATTR_LAST_DEFINED
  98 } AtkTextAttribute;
  99
 100 AtkTextAttribute         atk_text_attribute_register   (const gchar *name);
 101
 102
 103 #define ATK_TYPE_TEXT                    (atk_text_get_type ())
 104 #define ATK_IS_TEXT(obj)                 G_TYPE_CHECK_INSTANCE_TYPE ((obj), ATK_TYPE_TEXT)
 105 #define ATK_TEXT(obj)                    G_TYPE_CHECK_INSTANCE_CAST ((obj), ATK_TYPE_TEXT, AtkText)
 106 #define ATK_TEXT_GET_IFACE(obj)          (G_TYPE_INSTANCE_GET_INTERFACE ((obj), ATK_TYPE_TEXT, AtkTextIface))
 107
 108 #ifndef _TYPEDEF_ATK_TEXT_
 109 #define _TYPEDEF_ATK_TEXT_
 110 typedef struct _AtkText AtkText;
 111 #endif
 112 typedef struct _AtkTextIface AtkTextIface;
 113
 114 /**
 115  *AtkTextBoundary:
 116  *@ATK_TEXT_BOUNDARY_CHAR: Boundary is the boundary between characters
 117  * (including non-printing characters)
 118  *@ATK_TEXT_BOUNDARY_WORD_START: Boundary is the start (i.e. first character) of a word.
 119  *@ATK_TEXT_BOUNDARY_WORD_END: Boundary is the end (i.e. last character) of a word.
 120  *@ATK_TEXT_BOUNDARY_SENTENCE_START: Boundary is the first character in a sentence.
 121  *@ATK_TEXT_BOUNDARY_SENTENCE_END: Boundary is the last (terminal) character in a sentence;
 122  * in languages which use "sentence stop" punctuation such as English, the boundary is thus the
 123  * '.', '?', or similar terminal punctuation character.
 124  *@ATK_TEXT_BOUNDARY_LINE_START: Boundary is the initial character of the content or a
 125  * character immediately following a newline, linefeed, or return character.
 126  *@ATK_TEXT_BOUNDARY_LINE_END: Boundary is the linefeed, or return character.
 127  *
 128  *Text boundary types used for specifying boundaries for regions of text
 129  **/
 130 typedef enum {
 131   ATK_TEXT_BOUNDARY_CHAR,
 132   ATK_TEXT_BOUNDARY_WORD_START,
 133   ATK_TEXT_BOUNDARY_WORD_END,
 134   ATK_TEXT_BOUNDARY_SENTENCE_START,
 135   ATK_TEXT_BOUNDARY_SENTENCE_END,
 136   ATK_TEXT_BOUNDARY_LINE_START,
 137   ATK_TEXT_BOUNDARY_LINE_END
 138 } AtkTextBoundary;
 139
 140 /**
 141  * AtkTextRectangle:
 142  * @x: The horizontal coordinate of a rectangle
 143  * @y: The vertical coordinate of a rectangle
 144  * @width: The width of a rectangle
 145  * @height: The height of a rectangle
 146  *
 147  * A structure used to store a rectangle used by AtkText.
 148  **/
 149
 150 typedef struct _AtkTextRectangle AtkTextRectangle;
 151
 152 struct _AtkTextRectangle {
 153   gint x;
 154   gint y;
 155   gint width;
 156   gint height;
 157 };
 158
 159 /**
 160  * AtkTextRange:
 161  * @bounds: A rectangle giving the bounds of the text range
 162  * @start_offset: The start offset of a AtkTextRange
 163  * @end_offset: The end offset of a AtkTextRange
 164  * @content: The text in the text range
 165  *
 166  * A structure used to describe a text range.
 167  **/
 168 typedef struct _AtkTextRange AtkTextRange;
 169
 170 struct _AtkTextRange {
 171   AtkTextRectangle bounds;
 172   gint start_offset;
 173   gint end_offset;
 174   gchar* content;
 175 };
 176
 177 GType atk_text_range_get_type (void);
 178
 179 /**
 180  *AtkTextClipType
 181  *@ATK_TEXT_CLIP_NONE: No clipping to be done
 182  *@ATK_TEXT_CLIP_MIN: Text clipped by min coordinate is omitted
 183  *@ATK_TEXT_CLIP_MAX: Text clipped by max coordinate is omitted
 184  *@ATK_TEXT_CLIP_BOTH: Only text fully within mix/max bound is retained
 185  *
 186  *Describes the type of clipping required.
 187  **/
 188 typedef enum {
 189     ATK_TEXT_CLIP_NONE,
 190     ATK_TEXT_CLIP_MIN,
 191     ATK_TEXT_CLIP_MAX,
 192     ATK_TEXT_CLIP_BOTH
 193 } AtkTextClipType;
 194
 195 struct _AtkTextIface
 196 {
 197   GTypeInterface parent;
 198
 199   gchar*         (* get_text)                     (AtkText          *text,
 200                                                    gint             start_offset,
 201                                                    gint             end_offset);
 202   gchar*         (* get_text_after_offset)        (AtkText          *text,
 203                                                    gint             offset,
 204                                                    AtkTextBoundary  boundary_type,
 205                                                    gint             *start_offset,
 206                                                    gint             *end_offset);
 207   gchar*         (* get_text_at_offset)           (AtkText          *text,
 208                                                    gint             offset,
 209                                                    AtkTextBoundary  boundary_type,
 210                                                    gint             *start_offset,
 211                                                    gint             *end_offset);
 212   gunichar       (* get_character_at_offset)      (AtkText          *text,
 213                                                    gint             offset);
 214   gchar*         (* get_text_before_offset)       (AtkText          *text,
 215                                                    gint             offset,
 216                                                    AtkTextBoundary  boundary_type,
 217                                                    gint             *start_offset,
 218                                                    gint             *end_offset);
 219   gint           (* get_caret_offset)             (AtkText          *text);
 220   AtkAttributeSet* (* get_run_attributes)         (AtkText          *text,
 221                                                    gint             offset,
 222                                                    gint             *start_offset,
 223                                                    gint             *end_offset);
 224   AtkAttributeSet* (* get_default_attributes)     (AtkText          *text);
 225   void           (* get_character_extents)        (AtkText          *text,
 226                                                    gint             offset,
 227                                                    gint             *x,
 228                                                    gint             *y,
 229                                                    gint             *width,
 230                                                    gint             *height,
 231                                                    AtkCoordType     coords);
 232   gint           (* get_character_count)          (AtkText          *text);
 233   gint           (* get_offset_at_point)          (AtkText          *text,
 234                                                    gint             x,
 235                                                    gint             y,
 236                                                    AtkCoordType     coords);
 237   gint           (* get_n_selections)             (AtkText          *text);
 238   gchar*         (* get_selection)                (AtkText          *text,
 239                                                    gint             selection_num,
 240                                                    gint             *start_offset,
 241                                                    gint             *end_offset);
 242   gboolean       (* add_selection)                (AtkText          *text,
 243                                                    gint             start_offset,
 244                                                    gint             end_offset);
 245   gboolean       (* remove_selection)             (AtkText          *text,
 246                                                    gint             selection_num);
 247   gboolean       (* set_selection)                (AtkText          *text,
 248                                                    gint             selection_num,
 249                                                    gint             start_offset,
 250                                                    gint             end_offset);
 251   gboolean       (* set_caret_offset)             (AtkText          *text,
 252                                                    gint             offset);
 253
 254   /*
 255    * signal handlers
 256    */
 257   void           (* text_changed)                 (AtkText          *text,
 258                                                    gint             position,
 259                                                    gint             length);
 260   void           (* text_caret_moved)             (AtkText          *text,
 261                                                    gint             location);
 262   void           (* text_selection_changed)       (AtkText          *text);
 263
 264   void           (* text_attributes_changed)      (AtkText          *text);
 265
 266
 267   void           (* get_range_extents)            (AtkText          *text,
 268                                                    gint             start_offset,
 269                                                    gint             end_offset,
 270                                                    AtkCoordType     coord_type,
 271                                                    AtkTextRectangle *rect);
 272
 273   AtkTextRange** (* get_bounded_ranges)           (AtkText          *text,
 274                                                    AtkTextRectangle *rect,
 275                                                    AtkCoordType     coord_type,
 276                                                    AtkTextClipType  x_clip_type,
 277                                                    AtkTextClipType  y_clip_type);
 278
 279
 280   AtkFunction    pad4;
 281 };
 282
 283 GType            atk_text_get_type (void);
 284
 285
 286 /*
 287  * Additional AtkObject properties used by AtkText:
 288  *    "accessible_text" (accessible text has changed)
 289  *    "accessible_caret" (accessible text cursor position changed:
 290  *                         editable text only)
 291  */
 292
 293 gchar*        atk_text_get_text                           (AtkText          *text,
 294                                                            gint             start_offset,
 295                                                            gint             end_offset);
 296 gunichar      atk_text_get_character_at_offset            (AtkText          *text,
 297                                                            gint             offset);
 298 gchar*        atk_text_get_text_after_offset              (AtkText          *text,
 299                                                            gint             offset,
 300                                                            AtkTextBoundary  boundary_type,
 301                                                            gint             *start_offset,
 302                                                            gint             *end_offset);
 303 gchar*        atk_text_get_text_at_offset                 (AtkText          *text,
 304                                                            gint             offset,
 305                                                            AtkTextBoundary  boundary_type,
 306                                                            gint             *start_offset,
 307                                                            gint             *end_offset);
 308 gchar*        atk_text_get_text_before_offset             (AtkText          *text,
 309                                                            gint             offset,
 310                                                            AtkTextBoundary  boundary_type,
 311                                                            gint             *start_offset,
 312                                                            gint             *end_offset);
 313 gint          atk_text_get_caret_offset                   (AtkText          *text);
 314 void          atk_text_get_character_extents              (AtkText          *text,
 315                                                            gint             offset,
 316                                                            gint             *x,
 317                                                            gint             *y,
 318                                                            gint             *width,
 319                                                            gint             *height,
 320                                                            AtkCoordType     coords);
 321 AtkAttributeSet* atk_text_get_run_attributes              (AtkText          *text,
 322                                                            gint             offset,
 323                                                            gint             *start_offset,
 324                                                            gint             *end_offset);
 325 AtkAttributeSet* atk_text_get_default_attributes          (AtkText          *text);
 326 gint          atk_text_get_character_count                (AtkText          *text);
 327 gint          atk_text_get_offset_at_point                (AtkText          *text,
 328                                                            gint             x,
 329                                                            gint             y,
 330                                                            AtkCoordType     coords);
 331 gint          atk_text_get_n_selections                   (AtkText          *text);
 332 gchar*        atk_text_get_selection                      (AtkText          *text,
 333                                                            gint             selection_num,
 334                                                            gint             *start_offset,
 335                                                            gint             *end_offset);
 336 gboolean      atk_text_add_selection                      (AtkText          *text,
 337                                                            gint             start_offset,
 338                                                            gint             end_offset);
 339 gboolean      atk_text_remove_selection                   (AtkText          *text,
 340                                                            gint             selection_num);
 341 gboolean      atk_text_set_selection                      (AtkText          *text,
 342                                                            gint             selection_num,
 343                                                            gint             start_offset,
 344                                                            gint             end_offset);
 345 gboolean      atk_text_set_caret_offset                   (AtkText          *text,
 346                                                            gint             offset);
 347 void          atk_text_get_range_extents                  (AtkText          *text,
 348
 349                                                            gint             start_offset,
 350                                                            gint             end_offset,
 351                                                            AtkCoordType     coord_type,
 352                                                            AtkTextRectangle *rect);
 353 AtkTextRange**  atk_text_get_bounded_ranges               (AtkText          *text,
 354                                                            AtkTextRectangle *rect,
 355                                                            AtkCoordType     coord_type,
 356                                                            AtkTextClipType  x_clip_type,
 357                                                            AtkTextClipType  y_clip_type);
 358 void          atk_text_free_ranges                        (AtkTextRange     **ranges);
 359 void          atk_attribute_set_free                      (AtkAttributeSet  *attrib_set);
 360 G_CONST_RETURN gchar*  atk_text_attribute_get_name        (AtkTextAttribute attr);
 361 AtkTextAttribute       atk_text_attribute_for_name        (const gchar      *name);
 362 G_CONST_RETURN gchar*  atk_text_attribute_get_value       (AtkTextAttribute attr,
 363                                                            gint             index_);
 364
 365 G_END_DECLS
 366
 367 #endif /* __ATK_TEXT_H__ */