Main Page Widgets Namespaces Book

# Atk::Text Class Reference

Inheritance diagram for Atk::Text:

[legend]
List of all members.

## Detailed Description

The ATK interface implemented by components with text content.

This should be implemented by Atk::Objects on behalf of widgets that have text content which is either attributed or otherwise non-trivial. Atk::Objects whose text content is simple, unattributed, and very brief may expose that content via Atk::Object::get_name() instead; however if the text is editable, multi-line, typically longer than three or four words, attributed, selectable, or if the object already uses the 'name' ATK property for other information, this Text interface should be used to expose the text content. In the case of editable text content, Atk::EditableText (a subtype of the Atk::Text interface) should be implemented instead.

Atk::Text provides not only traversal facilities and change notification for text content, but also caret tracking and glyph bounding box calculations. Note that the text strings are exposed as UTF-8, and are therefore potentially multi-byte, and caret-to-byte offset mapping makes no assumptions about the character length; also bounding box glyph-to-offset mapping may be complex for languages which use ligatures.

## Public Types

typedef AtkTextRectangle | Rectangle

## Public Member Functions

bool | add_selection (int start_offset, int end_offset)
| Adds a selection bounded by the specified offsets.
AtkTextRange** | get_bounded_ranges (const Rectangle& rect, CoordType coord_type, TextClipType x_clip_type, TextClipType y_clip_type)
| Get the ranges of text in the specified bounding box.
int | get_caret_offset () const
| Gets the offset position of the caret (cursor).
gunichar | get_character_at_offset (int offset) const
| Gets the specified text.
int | get_character_count () const
| Gets the character count.
void | get_character_extents (int offset, int& x, int& y, int& width, int& height, CoordType coords) const
| Get the bounding box containing the glyph representing the character at a particular text offset.
AttributeSet | get_default_attributes () const
| Creates an Atk::AttributeSet which consists of the default values of attributes for the text.
int | get_n_selections () const
| Gets the number of selected regions.
int | get_offset_at_point (int x, int y, CoordType coords) const
| Gets the offset of the character located at coordinates x and y .
void | get_range_extents (int start_offset, int end_offset, CoordType coord_type, Rectangle& rect)
| Get the bounding box for text within the specified range.
AttributeSet | get_run_attributes (int offset, int& start_offset, int& end_offset) const
| Creates an Atk::AttributeSet which consists of the attributes explicitly set at the position offset in the text.
Glib::ustring | get_selection (int selection_num, int& start_offset, int& end_offset) const
| Gets the text from the specified selection.
Glib::ustring | get_text (int start_offset, int end_offset) const
| Gets the specified text.
Glib::ustring | get_text_after_offset (int offset, TextBoundary boundary_type, int& start_offset, int& end_offset) const
| Gets the specified text.
Glib::ustring | get_text_at_offset (int offset, TextBoundary boundary_type, int& start_offset, int& end_offset) const
| Gets the specified text.
Glib::ustring | get_text_before_offset (int offset, TextBoundary boundary_type, int& start_offset, int& end_offset) const
| Gets the specified text.
const AtkText* | gobj () const
| Provides access to the underlying C GObject.
AtkText* | gobj ()
| Provides access to the underlying C GObject.
bool | remove_selection (int selection_num)
| Removes the specified selection.
bool | set_caret_offset (int offset)
| Sets the caret (cursor) position to the specified offset .
bool | set_selection (int selection_num, int start_offset, int end_offset)
| Changes the start and end offset of the specified selection.
Glib::SignalProxy0<void> | signal_text_attributes_changed ()

Prototype:
  `void on_my_text_attributes_changed()`

Glib::SignalProxy1< void, int > | signal_text_caret_moved ()

Prototype:
  `void on_my_text_caret_moved(int location)`

Glib::SignalProxy2< void, int, int > | signal_text_changed ()

Prototype:
  `void on_my_text_changed(int position, int length)`

Glib::SignalProxy0<void> | signal_text_selection_changed ()

Prototype:
  `void on_my_text_selection_changed()`

virtual | ~Text ()

## Static Public Member Functions

static void | add_interface (GType gtype_implementer)

## Protected Member Functions

virtual bool | add_selection_vfunc (int start_offset, int end_offset)
virtual int | get_caret_offset_vfunc () const
virtual gunichar | get_character_at_offset_vfunc (int offset) const
virtual int | get_character_count_vfunc () const
virtual void | get_character_extents_vfunc (int offset, int& x, int& y, int& width, int& height, CoordType coords) const
virtual AtkAttributeSet* | get_default_attributes_vfunc () const
virtual int | get_n_selections_vfunc () const
virtual int | get_offset_at_point_vfunc (int x, int y, CoordType coords) const
virtual AtkAttributeSet* | get_run_attributes_vfunc (int offset, int& start_offset, int& end_offset) const
virtual Glib::ustring | get_selection_vfunc (int selection_num, int& start_offset, int& end_offset) const
virtual Glib::ustring | get_text_after_offset_vfunc (int offset, TextBoundary boundary_type, int& start_offset, int& end_offset) const
virtual Glib::ustring | get_text_at_offset_vfunc (int offset, TextBoundary boundary_type, int& start_offset, int& end_offset) const
virtual Glib::ustring | get_text_before_offset_vfunc (int offset, TextBoundary boundary_type, int& start_offset, int& end_offset) const
virtual Glib::ustring | get_text_vfunc (int start_offset, int end_offset) const
virtual void | on_text_attributes_changed ()
virtual void | on_text_caret_moved (int location)
virtual void | on_text_changed (int position, int length)
virtual void | on_text_selection_changed ()
virtual bool | remove_selection_vfunc (int selection_num)
virtual bool | set_caret_offset_vfunc (int offset)
virtual bool | set_selection_vfunc (int selection_num, int start_offset, int end_offset)

## Related Functions

(Note that these are not member functions.)
Glib::RefPtr<Atk::Text> | wrap (AtkText* object, bool take_copy=false)
| A Glib::wrap() method for this object.

## Member Typedef Documentation

typedef AtkTextRectangle Atk::Text::Rectangle

## Constructor & Destructor Documentation

virtual Atk::Text::~Text | ( |  | ) | `[virtual]`

## Member Function Documentation

static void Atk::Text::add_interface | ( | GType | gtype_implementer | ) | `[static]`

bool Atk::Text::add_selection | ( | int | start_offset,
|  | int | end_offset |
| ) |  |  |

Adds a selection bounded by the specified offsets.

Parameters:

  | start_offset | The start position of the selected region.
  | end_offset | The offset of the first character after the selected region.

Returns:
  `true` if success, `false` otherwise.

virtual bool Atk::Text::add_selection_vfunc | ( | int | start_offset,
|  | int | end_offset |
| ) |  |  | `[protected, virtual]`

AtkTextRange** Atk::Text::get_bounded_ranges | ( | const Rectangle& | rect,
|  | CoordType | coord_type,
|  | TextClipType | x_clip_type,
|  | TextClipType | y_clip_type |
| ) |  |  |

Get the ranges of text in the specified bounding box.

Parameters:

  | rect | An AtkTextRectagle giving the dimensions of the bounding box.
  | coord_type | Specify whether coordinates are relative to the screen or widget window.
  | x_clip_type | Specify the horizontal clip type.
  | y_clip_type | Specify the vertical clip type.

Returns:
  Array of AtkTextRange. The last element of the array returned by this function will be `0`.

int Atk::Text::get_caret_offset | ( |  | ) | const

Gets the offset position of the caret (cursor).

Returns:
  The offset position of the caret (cursor).

virtual int Atk::Text::get_caret_offset_vfunc | ( |  | ) | const`[protected, virtual]`

gunichar Atk::Text::get_character_at_offset | ( | int | offset | ) | const

Gets the specified text.

Parameters:

  | offset | Position.

Returns:
  The character at offset .

virtual gunichar Atk::Text::get_character_at_offset_vfunc | ( | int | offset | ) | const`[protected, virtual]`

int Atk::Text::get_character_count | ( |  | ) | const

Gets the character count.

Returns:
  The number of characters.

virtual int Atk::Text::get_character_count_vfunc | ( |  | ) | const`[protected, virtual]`

void Atk::Text::get_character_extents | ( | int | offset,
|  | int & | x,
|  | int & | y,
|  | int & | width,
|  | int & | height,
|  | CoordType | coords |
| ) |  |  | const

Get the bounding box containing the glyph representing the character at a particular text offset.

Parameters:

  | offset | The offset of the text character for which bounding information is required.
  | x | Pointer for the x cordinate of the bounding box.
  | y | Pointer for the y cordinate of the bounding box.
  | width | Pointer for the width of the bounding box.
  | height | Pointer for the height of the bounding box.
  | coords | Specify whether coordinates are relative to the screen or widget window.

virtual void Atk::Text::get_character_extents_vfunc | ( | int | offset,
|  | int & | x,
|  | int & | y,
|  | int & | width,
|  | int & | height,
|  | CoordType | coords |
| ) |  |  | const`[protected, virtual]`

AttributeSet Atk::Text::get_default_attributes | ( |  | ) | const

Creates an Atk::AttributeSet which consists of the default values of attributes for the text.

See the enum AtkTextAttribute for types of text attributes that can be returned. Note that other attributes may also be returned.

Returns:
  An Atk::AttributeSet which contains the default values of attributes. at offset .

virtual AtkAttributeSet* Atk::Text::get_default_attributes_vfunc | ( |  | ) | const`[protected, virtual]`

int Atk::Text::get_n_selections | ( |  | ) | const

Gets the number of selected regions.

Returns:
  The number of selected regions, or -1 if a failure occurred.

virtual int Atk::Text::get_n_selections_vfunc | ( |  | ) | const`[protected, virtual]`

int Atk::Text::get_offset_at_point | ( | int | x,
|  | int | y,
|  | CoordType | coords |
| ) |  |  | const

Gets the offset of the character located at coordinates x and y .

x and y are interpreted as being relative to the screen or this widget's window depending on coords .

Parameters:

  | x | Screen x-position of character.
  | y | Screen y-position of character.
  | coords | Specify whether coordinates are relative to the screen or widget window.

Returns:
  The offset to the character which is located at the specified x and y coordinates.

virtual int Atk::Text::get_offset_at_point_vfunc | ( | int | x,
|  | int | y,
|  | CoordType | coords |
| ) |  |  | const`[protected, virtual]`

void Atk::Text::get_range_extents | ( | int | start_offset,
|  | int | end_offset,
|  | CoordType | coord_type,
|  | Rectangle& | rect |
| ) |  |  |

Get the bounding box for text within the specified range.

Parameters:

  | start_offset | The offset of the first text character for which boundary information is required.
  | end_offset | The offset of the text character after the last character for which boundary information is required.
  | coord_type | Specify whether coordinates are relative to the screen or widget window.
  | rect | A pointer to a AtkTextRectangle which is filled in by this function.

AttributeSet Atk::Text::get_run_attributes | ( | int | offset,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const

Creates an Atk::AttributeSet which consists of the attributes explicitly set at the position offset in the text.

start_offset and end_offset are set to the start and end of the range around offset where the attributes are invariant. See the enum AtkTextAttribute for types of text attributes that can be returned. Note that other attributes may also be returned.

Parameters:

  | offset | The offset at which to get the attributes.
  | start_offset | The address to put the start offset of the range.
  | end_offset | The address to put the end offset of the range.

Returns:
  An Atk::AttributeSet which contains the attributes explicitly set at offset .

virtual AtkAttributeSet* Atk::Text::get_run_attributes_vfunc | ( | int | offset,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const`[protected, virtual]`

Glib::ustring Atk::Text::get_selection | ( | int | selection_num,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const

Gets the text from the specified selection.

Parameters:

  | selection_num | The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
  | start_offset | Passes back the start position of the selected region.
  | end_offset | Passes back the end position of (e.g. offset immediately past) the selected region.

Returns:
  The selected text.

virtual Glib::ustring Atk::Text::get_selection_vfunc | ( | int | selection_num,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const`[protected, virtual]`

Glib::ustring Atk::Text::get_text | ( | int | start_offset,
|  | int | end_offset |
| ) |  |  | const

Gets the specified text.

Parameters:

  | start_offset | Start position.
  | end_offset | End position.

Returns:
  The text from start_offset up to, but not including end_offset .

Glib::ustring Atk::Text::get_text_after_offset | ( | int | offset,
|  | TextBoundary | boundary_type,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const

Gets the specified text.

If the boundary_type if ATK_TEXT_BOUNDARY_CHAR the character after the offset is returned.

If the boundary_type is ATK_TEXT_BOUNDARY_WORD_START the returned string is from the word start after the offset to the next word start.

The returned string will contain the word after the offset if the offset is inside a word or if the offset is not inside a word.

If the boundary_type is ATK_TEXT_BOUNDARY_WORD_END the returned string is from the word end at or after the offset to the next work end.

The returned string will contain the word after the offset if the offset is inside a word and will contain the word after the word after the offset if the offset is not inside a word.

If the boundary type is ATK_TEXT_BOUNDARY_SENTENCE_START the returned string is from the sentence start after the offset to the next sentence start.

The returned string will contain the sentence after the offset if the offset is inside a sentence or if the offset is not inside a sentence.

If the boundary_type is ATK_TEXT_BOUNDARY_SENTENCE_END the returned string is from the sentence end at or after the offset to the next sentence end.

The returned string will contain the sentence after the offset if the offset is inside a sentence and will contain the sentence after the sentence after the offset if the offset is not inside a sentence.

If the boundary type is ATK_TEXT_BOUNDARY_LINE_START the returned string is from the line start after the offset to the next line start.

If the boundary_type is ATK_TEXT_BOUNDARY_LINE_END the returned string is from the line end at or after the offset to the next line start.

Parameters:

  | offset | Position.
  | boundary_type | An Atk::TextBoundary.
  | start_offset | The start offset of the returned string.
  | end_offset | The offset of the first character after the returned substring.

Returns:
  The text after offset bounded by the specified boundary_type .

virtual Glib::ustring Atk::Text::get_text_after_offset_vfunc | ( | int | offset,
|  | TextBoundary | boundary_type,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const`[protected, virtual]`

Glib::ustring Atk::Text::get_text_at_offset | ( | int | offset,
|  | TextBoundary | boundary_type,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const

Gets the specified text.

If the boundary_type if ATK_TEXT_BOUNDARY_CHAR the character at the offset is returned.

If the boundary_type is ATK_TEXT_BOUNDARY_WORD_START the returned string is from the word start at or before the offset to the word start after the offset.

The returned string will contain the word at the offset if the offset is inside a word and will contain the word before the offset if the offset is not inside a word.

If the boundary_type is ATK_TEXT_BOUNDARY_WORD_END the returned string is from the word end before the offset to the word end at or after the offset.

The returned string will contain the word at the offset if the offset is inside a word and will contain the word after to the offset if the offset is not inside a word.

If the boundary type is ATK_TEXT_BOUNDARY_SENTENCE_START the returned string is from the sentence start at or before the offset to the sentence start after the offset.

The returned string will contain the sentence at the offset if the offset is inside a sentence and will contain the sentence before the offset if the offset is not inside a sentence.

If the boundary_type is ATK_TEXT_BOUNDARY_SENTENCE_END the returned string is from the sentence end before the offset to the sentence end at or after the offset.

The returned string will contain the sentence at the offset if the offset is inside a sentence and will contain the sentence after the offset if the offset is not inside a sentence.

If the boundary type is ATK_TEXT_BOUNDARY_LINE_START the returned string is from the line start at or before the offset to the line start after the offset.

If the boundary_type is ATK_TEXT_BOUNDARY_LINE_END the returned string is from the line end before the offset to the line end at or after the offset.

Parameters:

  | offset | Position.
  | boundary_type | An Atk::TextBoundary.
  | start_offset | The start offset of the returned string.
  | end_offset | The offset of the first character after the returned substring.

Returns:
  The text at offset bounded by the specified boundary_type .

virtual Glib::ustring Atk::Text::get_text_at_offset_vfunc | ( | int | offset,
|  | TextBoundary | boundary_type,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const`[protected, virtual]`

Glib::ustring Atk::Text::get_text_before_offset | ( | int | offset,
|  | TextBoundary | boundary_type,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const

Gets the specified text.

If the boundary_type if ATK_TEXT_BOUNDARY_CHAR the character before the offset is returned.

If the boundary_type is ATK_TEXT_BOUNDARY_WORD_START the returned string is from the word start before the word start before the offset to the word start before the offset.

The returned string will contain the word before the offset if the offset is inside a word and will contain the word before the word before the offset if the offset is not inside a word.

If the boundary_type is ATK_TEXT_BOUNDARY_WORD_END the returned string is from the word end before the word end at or before the offset to the word end at or before the offset.

The returned string will contain the word before the offset if the offset is inside a word or if the offset is not inside a word.

If the boundary type is ATK_TEXT_BOUNDARY_SENTENCE_START the returned string is from the sentence start before the sentence start before the offset to the sentence start before the offset.

The returned string will contain the sentence before the offset if the offset is inside a sentence and will contain the sentence before the sentence before the offset if the offset is not inside a sentence.

If the boundary_type is ATK_TEXT_BOUNDARY_SENTENCE_END the returned string is from the sentence end before the sentence end at or before the offset to the sentence end at or before the offset.

The returned string will contain the sentence before the offset if the offset is inside a sentence or if the offset is not inside a sentence.

If the boundary type is ATK_TEXT_BOUNDARY_LINE_START the returned string is from the line start before the line start ar or before the offset to the line start ar or before the offset.

If the boundary_type is ATK_TEXT_BOUNDARY_LINE_END the returned string is from the line end before the line end before the offset to the line end before the offset.

Parameters:

  | offset | Position.
  | boundary_type | An Atk::TextBoundary.
  | start_offset | The start offset of the returned string.
  | end_offset | The offset of the first character after the returned substring.

Returns:
  The text before offset bounded by the specified boundary_type .

virtual Glib::ustring Atk::Text::get_text_before_offset_vfunc | ( | int | offset,
|  | TextBoundary | boundary_type,
|  | int & | start_offset,
|  | int & | end_offset |
| ) |  |  | const`[protected, virtual]`

virtual Glib::ustring Atk::Text::get_text_vfunc | ( | int | start_offset,
|  | int | end_offset |
| ) |  |  | const`[protected, virtual]`

const AtkText* Atk::Text::gobj | ( |  | ) | const`[inline]`

Provides access to the underlying C GObject.

Reimplemented from Glib::Interface.

Reimplemented in Atk::NoOpObject.

AtkText* Atk::Text::gobj | ( |  | ) | `[inline]`

Provides access to the underlying C GObject.

Reimplemented from Glib::Interface.

Reimplemented in Atk::NoOpObject.

virtual void Atk::Text::on_text_attributes_changed | ( |  | ) | `[protected, virtual]`

virtual void Atk::Text::on_text_caret_moved | ( | int | location | ) | `[protected, virtual]`

virtual void Atk::Text::on_text_changed | ( | int | position,
|  | int | length |
| ) |  |  | `[protected, virtual]`

virtual void Atk::Text::on_text_selection_changed | ( |  | ) | `[protected, virtual]`

bool Atk::Text::remove_selection | ( | int | selection_num | ) |

Removes the specified selection.

Parameters:

  | selection_num | The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.

Returns:
  `true` if success, `false` otherwise.

virtual bool Atk::Text::remove_selection_vfunc | ( | int | selection_num | ) | `[protected, virtual]`

bool Atk::Text::set_caret_offset | ( | int | offset | ) |

Sets the caret (cursor) position to the specified offset .

Parameters:

  | offset | Position.

Returns:
  `true` if success, `false` otherwise.

virtual bool Atk::Text::set_caret_offset_vfunc | ( | int | offset | ) | `[protected, virtual]`

bool Atk::Text::set_selection | ( | int | selection_num,
|  | int | start_offset,
|  | int | end_offset |
| ) |  |  |

Changes the start and end offset of the specified selection.

Parameters:

  | selection_num | The selection number. The selected regions are assigned numbers that correspond to how far the region is from the start of the text. The selected region closest to the beginning of the text region is assigned the number 0, etc. Note that adding, moving or deleting a selected region can change the numbering.
  | start_offset | The new start position of the selection.
  | end_offset | The new end position of (e.g. offset immediately past) the selection.

Returns:
  `true` if success, `false` otherwise.

virtual bool Atk::Text::set_selection_vfunc | ( | int | selection_num,
|  | int | start_offset,
|  | int | end_offset |
| ) |  |  | `[protected, virtual]`

Glib::SignalProxy0< void > Atk::Text::signal_text_attributes_changed | ( |  | ) |

Prototype:
  `void on_my_text_attributes_changed()`

Glib::SignalProxy1< void,int > Atk::Text::signal_text_caret_moved | ( |  | ) |

Prototype:
  `void on_my_text_caret_moved(int location)`

Glib::SignalProxy2< void,int,int > Atk::Text::signal_text_changed | ( |  | ) |

Prototype:
  `void on_my_text_changed(int position, int length)`

Glib::SignalProxy0< void > Atk::Text::signal_text_selection_changed | ( |  | ) |

Prototype:
  `void on_my_text_selection_changed()`

## Friends And Related Function Documentation

Glib::RefPtr<Atk::Text> wrap | ( | AtkText * | object,
|  | bool | take_copy = `false` |
| ) |  |  | `[related]`

A Glib::wrap() method for this object.

Parameters:

  | object | The C instance.
  | take_copy | False if the result should take ownership of the C instance. True if it should take a new copy or ref.

Returns:
  A C++ instance that wraps this C instance.

The documentation for this class was generated from the following file:

- text.h