# gtksourceview::SourceBuffer Class Reference

The model for SourceView widgets. More...

`#include <sourcebuffer.h>`

List of all members.

## Public Types
typedef SourceBuffer | CppObjectType
typedef SourceBuffer_Class | CppClassType
typedef GtkSourceBuffer | BaseObjectType
typedef GtkSourceBufferClass | BaseClassType
## Public Member Functions
virtual | ~SourceBuffer ()
GtkSourceBuffer * | gobj ()
| Provides access to the underlying C GObject.
const GtkSourceBuffer * | gobj () const
| Provides access to the underlying C GObject.
GtkSourceBuffer * | gobj_copy ()
| Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.
bool | get_highlight_matching_brackets () const
| Determines whether bracket match highlighting is activated for the source buffer.
void | set_highlight_matching_brackets (bool highlight=true)
| controls the bracket match highlighting function in the buffer.
bool | get_highlight_syntax () const
| Determines whether text highlighting is activated in the source buffer.
void | set_highlight_syntax (bool highlight=true)
| controls whether text is highlighted in the buffer.
int | get_max_undo_levels () const
| Determines the number of undo levels the buffer will track for buffer edits.
void | set_max_undo_levels (int max_undo_levels)
| Sets the number of undo levels for user actions the buffer will track.
Glib::RefPtr< SourceLanguage > | get_language ()
| Determines the GtkSourceLanguage used by the buffer.
Glib::RefPtr< const SourceLanguage > | get_language () const
| Determines the GtkSourceLanguage used by the buffer.
void | set_language (const Glib::RefPtr< SourceLanguage > &language)
| Sets the GtkSourceLanguage the source buffer will use.
bool | can_undo () const
| Determines the escaping character used by the source buffer highlighting engine.
bool | can_redo () const
| Determines whether a source buffer can redo the last action.
void | undo ()
| Undoes the last user action which modified the buffer.
void | redo ()
| redoes the last undo operation.
void | begin_not_undoable_action ()
| Marks the beginning of a not undoable action on the buffer, disabling the undo manager.
void | end_not_undoable_action ()
| Marks the end of a not undoable action on the buffer.
bool | backward_iter_to_source_mark (Gtk::TextIter &iter, const Glib::ustring &category)
bool | backward_iter_to_source_mark (Gtk::TextIter &iter)
bool | forward_iter_to_source_mark (Gtk::TextIter &iter, const Glib::ustring &category)
bool | forward_iter_to_source_mark (Gtk::TextIter &iter)
void | ensure_highlight (const Gtk::TextIter &start, const Gtk::TextIter &end)
void | set_style_scheme (const Glib::RefPtr< SourceStyleScheme > &scheme)
Glib::RefPtr< SourceStyleScheme > | get_style_scheme ()
Glib::RefPtr< const SourceStyleScheme > | get_style_scheme () const
Glib::RefPtr< SourceMark > | create_source_mark (const Glib::ustring &name, const Glib::ustring &category, const Gtk::TextIter &where)
Glib::SListHandle < Glib::RefPtr< SourceMark > > | get_source_marks_at_line (int line, const Glib::ustring &category) const
Glib::SListHandle < Glib::RefPtr< SourceMark > > | get_source_marks_at_line (int line) const
Glib::SListHandle < Glib::RefPtr< SourceMark > > | get_source_marks_at_iter (Gtk::TextIter &iter, const Glib::ustring &category) const
Glib::SListHandle < Glib::RefPtr< SourceMark > > | get_source_marks_at_iter (Gtk::TextIter &iter) const
void | remove_source_marks (const Gtk::TextIter &start, const Gtk::TextIter &end, const Glib::ustring &category)
signals
Glib::SignalProxy2< void, Gtk::TextIter &, Gtk::TextIter & > | signal_highlight_updated ()
| Emitted whenever there is a change in the buffer's ability to redo an operation.
## Static Public Member Functions
static GType | get_type () G_GNUC_CONST
static GType | get_base_type () G_GNUC_CONST
static Glib::RefPtr< SourceBuffer > | create (const Glib::RefPtr< Gtk::TextTagTable > &tagtable)
| create a new SourceBuffer, from a Gtk::TextTagTable.
static Glib::RefPtr< SourceBuffer > | create (const Glib::RefPtr< SourceLanguage > &language)
## Protected Member Functions
| SourceBuffer (const Glib::ConstructParams &construct_params)
| SourceBuffer (GtkSourceBuffer *castitem)
| SourceBuffer ()
| SourceBuffer (const Glib::RefPtr< Gtk::TextTagTable > &tagtable)
| SourceBuffer (const Glib::RefPtr< SourceLanguage > &language)
## Friends
class | SourceBuffer_Class
## Related Functions
(Note that these are not member functions.)
Glib::RefPtr < gtksourceview::SourceBuffer > | wrap (GtkSourceBuffer *object, bool take_copy=false)

## Detailed Description

The model for SourceView widgets.

It extends the TextBuffer object by adding features necessary to display and edit source code: syntax highlighting, bracket matching and markers. It also implements support for undo/redo operations. To create a SourceBuffer use SourceBuffer::create(). By default highlighting is enabled, but you can disable it with SourceBuffer::set_highlight_syntax(). This can be useful if you're not using SourceLanguage objects to set the highlighting patterns, and instead you're manually adding SourceTag objects to the buffer's tag table.

## Member Typedef Documentation

typedef SourceBuffer gtksourceview::SourceBuffer::CppObjectType

typedef SourceBuffer_Class gtksourceview::SourceBuffer::CppClassType

typedef GtkSourceBuffer gtksourceview::SourceBuffer::BaseObjectType

typedef GtkSourceBufferClass gtksourceview::SourceBuffer::BaseClassType

## Constructor & Destructor Documentation

gtksourceview::SourceBuffer::SourceBuffer | ( | const Glib::ConstructParams & | construct_params | ) | `[explicit, protected]`

gtksourceview::SourceBuffer::SourceBuffer | ( | GtkSourceBuffer * | castitem | ) | `[explicit, protected]`

virtual gtksourceview::SourceBuffer::~SourceBuffer | ( |  | ) | `[virtual]`

gtksourceview::SourceBuffer::SourceBuffer | ( |  | ) | `[protected]`

gtksourceview::SourceBuffer::SourceBuffer | ( | const Glib::RefPtr< Gtk::TextTagTable > & | tagtable | ) | `[explicit, protected]`

gtksourceview::SourceBuffer::SourceBuffer | ( | const Glib::RefPtr< SourceLanguage > & | language | ) | `[explicit, protected]`

## Member Function Documentation

static GType gtksourceview::SourceBuffer::get_type | ( |  | ) | `[static]`

static GType gtksourceview::SourceBuffer::get_base_type | ( |  | ) | `[static]`

GtkSourceBuffer* gtksourceview::SourceBuffer::gobj | ( |  | ) | `[inline]`

Provides access to the underlying C GObject.

const GtkSourceBuffer* gtksourceview::SourceBuffer::gobj | ( |  | ) | const`[inline]`

Provides access to the underlying C GObject.

GtkSourceBuffer* gtksourceview::SourceBuffer::gobj_copy | ( |  | ) |

Provides access to the underlying C instance. The caller is responsible for unrefing it. Use when directly setting fields in structs.

static Glib::RefPtr<SourceBuffer> gtksourceview::SourceBuffer::create | ( | const Glib::RefPtr< Gtk::TextTagTable > & | tagtable | ) | `[static]`

create a new SourceBuffer, from a Gtk::TextTagTable.

Parameters:

  | tagtable | a tag table to be taken in account

Returns:
  a new SourceBuffer

static Glib::RefPtr<SourceBuffer> gtksourceview::SourceBuffer::create | ( | const Glib::RefPtr< SourceLanguage > & | language | ) | `[static]`

brief create a new SourceBuffer

Parameters:

  | language | the language to be considered by the SourceBuffer for syntax highlighting.

Returns:
  a new SourceBuffer

bool gtksourceview::SourceBuffer::get_highlight_matching_brackets | ( |  | ) | const

Determines whether bracket match highlighting is activated for the source buffer.

Returns:
  true if the source buffer will highlight matching brackets, false otherwise. Determines whether bracket match highlighting is activated for the source buffer.

  `true` if the source buffer will highlight matching brackets.

void gtksourceview::SourceBuffer::set_highlight_matching_brackets | ( | bool | highlight = `true` | ) |

controls the bracket match highlighting function in the buffer.

If activated, when you position your cursor over a bracket character (a parenthesis, a square bracket, etc.) the matching opening or closing bracket character will be highlighted. You can specify the style with the SourceBuffer::set_bracket_match_style() function.

Parameters:

  | highlight | true if you want matching brackets highlighted. Controls the bracket match highlighting function in the buffer. If activated, when you position your cursor over a bracket character (a parenthesis, a square bracket, etc.) the matching opening or closing bracket character will be highlighted. You can specify the style with the gtk_source_buffer_set_bracket_match_style() function.
  | highlight | `true` if you want matching brackets highlighted.

bool gtksourceview::SourceBuffer::get_highlight_syntax | ( |  | ) | const

Determines whether text highlighting is activated in the source buffer.

Returns:
  true if highlighting is activated, false otherwise. Determines whether syntax highlighting is activated in the source buffer.

  `true` if syntax highlighting is enabled, `false` otherwise.

void gtksourceview::SourceBuffer::set_highlight_syntax | ( | bool | highlight = `true` | ) |

controls whether text is highlighted in the buffer.

If highlight is TRUE, the text will be highlighted according to the patterns installed in the buffer (either set with SourceBuffer::set_language() or by adding individual GtkSourceTag tags to the buffer's tag table). Otherwise, any current highlighted text will be restored to the default buffer style. Tags not of SourceTag type will not be removed by this option, and normal Gtk::TextTag priority settings apply when highlighting is enabled. If not using a SourceLanguage for setting the highlighting patterns in the buffer, it is recommended for performance reasons that you add all the SourceTag tags with highlighting disabled and enable it when finished.

Parameters:

  | highlight | true if you want to activate highlighting Controls whether syntax is highlighted in the buffer. If highlight is `true`, the text will be highlighted according to the syntax patterns specified in the language set with set_language(). If highlight is `false`, syntax highlighting is disabled and all the GtkTextTag objects that have been added by the syntax highlighting engine are removed from the buffer.
  | highlight | `true` to enable syntax highlighting, `false` to disable it.

int gtksourceview::SourceBuffer::get_max_undo_levels | ( |  | ) | const

Determines the number of undo levels the buffer will track for buffer edits.

Returns:
  the maximum number of possible undo levels. Determines the number of undo levels the buffer will track for buffer edits.

  The maximum number of possible undo levels or -1 if no limit is set.

void gtksourceview::SourceBuffer::set_max_undo_levels | ( | int | max_undo_levels | ) |

Sets the number of undo levels for user actions the buffer will track.

If the number of user actions exceeds the limit set by this function, older actions will be discarded. A new action is started whenever the function Gtk::TextBuffer::begin_user_action() is called. In general, this happens whenever the user presses any key which modifies the buffer, but the undo manager will try to merge similar consecutive actions, such as multiple character insertions into one action. But, inserting a newline does start a new action.

Parameters:

  | max_undo_levels | the desired maximum number of undo levels. Sets the number of undo levels for user actions the buffer will track. If the number of user actions exceeds the limit set by this function, older actions will be discarded.

If max_undo_levels is -1, no limit is set.

A new action is started whenever the function gtk_text_buffer_begin_user_action() is called. In general, this happens whenever the user presses any key which modifies the buffer, but the undo manager will try to merge similar consecutive actions, such as multiple character insertions into one action. But, inserting a newline does start a new action.

Parameters:

  | max_undo_levels | The desired maximum number of undo levels.

Glib::RefPtr<SourceLanguage> gtksourceview::SourceBuffer::get_language | ( |  | ) |

Determines the GtkSourceLanguage used by the buffer.

Returns:
  the SourceLanguage set by SourceBuffer::set_language(), or nil. Return value: Gtk::SourceLanguage associated with the buffer, or `0`.

  Gtk::SourceLanguage associated with the buffer, or `0`.

Glib::RefPtr<const SourceLanguage> gtksourceview::SourceBuffer::get_language | ( |  | ) | const

Determines the GtkSourceLanguage used by the buffer.

Returns:
  the SourceLanguage set by SourceBuffer::set_language(), or nil. Return value: Gtk::SourceLanguage associated with the buffer, or `0`.

  Gtk::SourceLanguage associated with the buffer, or `0`.

void gtksourceview::SourceBuffer::set_language | ( | const Glib::RefPtr< SourceLanguage > & | language | ) |

Sets the GtkSourceLanguage the source buffer will use.

This adds GtkSourceTag tags with the language's patterns and sets the escape character with SourceBuffer::set_escape_char(). Note that this will remove any SourceTag tags currently in the buffer's tag table. The buffer holds a reference to the language set.

Parameters:

  | language | a GtkSourceLanguage to set. Associate a Gtk::SourceLanguage with the source buffer. If language is not-`0` and syntax highlighting is enabled (see set_highlight_syntax()), the syntax patterns defined in language will be used to highlight the text contained in the buffer. If language is `0`, the text contained in the buffer is not highlighted.

The buffer holds a reference to language.

Parameters:

  | language | A Gtk::SourceLanguage to set, or `0`.

bool gtksourceview::SourceBuffer::can_undo | ( |  | ) | const

Determines the escaping character used by the source buffer highlighting engine.

Returns:
  the UTF-8 character for the escape character the buffer is using. Sets the escape character to be used by the highlighting engine. When performing the initial analysis, the engine will discard a matching syntax pattern if it's prefixed with an odd number of escape characters. This allows for example to correctly highlight strings with escaped quotes embedded. This setting affects only syntax patterns (i.e. those defined in GtkSyntaxTag tags).

Parameters:

  | escape_char | the escape character the buffer should use. Determines whether a source buffer can undo the last action

Returns:
  true if it's possible to undo the last action, false otherwise. Determines whether a source buffer can undo the last action.

  `true` if it's possible to undo the last action.

bool gtksourceview::SourceBuffer::can_redo | ( |  | ) | const

Determines whether a source buffer can redo the last action.

I.E if the last operation was an undo.

Returns:
  true if it's possible to redo the last action, false otherwise. Determines whether a source buffer can redo the last action (i.e. if the last operation was an undo).

  `true` if a redo is possible.

void gtksourceview::SourceBuffer::undo | ( |  | ) |

Undoes the last user action which modified the buffer.

Use SourceBuffer::can_undo() to check whether a call to this function will have any effect. Actions are defined as groups of operations between a call to TextBuffer::begin_user_action() and TextBuffer::end_user_action(), or sequences of similar edits (inserts or deletes) on the same line. Undoes the last user action which modified the buffer. Use can_undo() to check whether a call to this function will have any effect.

Actions are defined as groups of operations between a call to gtk_text_buffer_begin_user_action() and gtk_text_buffer_end_user_action(), or sequences of similar edits (inserts or deletes) on the same line.

void gtksourceview::SourceBuffer::redo | ( |  | ) |

redoes the last undo operation.

Use SourceBuffer::can_redo() to check whether a call to this function will have any effect. Redoes the last undo operation. Use can_redo() to check whether a call to this function will have any effect.

void gtksourceview::SourceBuffer::begin_not_undoable_action | ( |  | ) |

Marks the beginning of a not undoable action on the buffer, disabling the undo manager.

Typically you would call this function before initially setting the contents of the buffer (e.g. when loading a file in a text editor). You may nest SourceBuffer::begin_not_undoable_action() / SourceBuffer::end_not_undoable_action() blocks. Marks the beginning of a not undoable action on the buffer, disabling the undo manager. Typically you would call this function before initially setting the contents of the buffer (e.g. when loading a file in a text editor).

You may nest begin_not_undoable_action() / end_not_undoable_action() blocks.

void gtksourceview::SourceBuffer::end_not_undoable_action | ( |  | ) |

Marks the end of a not undoable action on the buffer.

When the last not undoable block is closed through the call to this function, the list of undo actions is cleared and the undo manager is re-enabled. Marks the end of a not undoable action on the buffer. When the last not undoable block is closed through the call to this function, the list of undo actions is cleared and the undo manager is re-enabled.

bool gtksourceview::SourceBuffer::backward_iter_to_source_mark | ( | Gtk::TextIter & | iter,
|  | const Glib::ustring & | category |
| ) |  |  |

bool gtksourceview::SourceBuffer::backward_iter_to_source_mark | ( | Gtk::TextIter & | iter | ) |

bool gtksourceview::SourceBuffer::forward_iter_to_source_mark | ( | Gtk::TextIter & | iter,
|  | const Glib::ustring & | category |
| ) |  |  |

bool gtksourceview::SourceBuffer::forward_iter_to_source_mark | ( | Gtk::TextIter & | iter | ) |

void gtksourceview::SourceBuffer::ensure_highlight | ( | const Gtk::TextIter & | start,
|  | const Gtk::TextIter & | end |
| ) |  |  |

Forces buffer to analyze and highlight the given area synchronously.

<note>

This is a potentially slow operation and should be used only when you need to make sure that some text not currently visible is highlighted, for instance before printing.

</note>

Parameters:

  | start | Start of the area to highlight.
  | end | End of the area to highlight.

void gtksourceview::SourceBuffer::set_style_scheme | ( | const Glib::RefPtr< SourceStyleScheme > & | scheme | ) |

Sets style scheme used by the buffer.

Parameters:

  | scheme | Style scheme.

Glib::RefPtr<SourceStyleScheme> gtksourceview::SourceBuffer::get_style_scheme | ( |  | ) |

Returns: the Gtk::SourceStyleScheme set by

Returns:
  The Gtk::SourceStyleScheme set by set_style_scheme(), or `0`.

Glib::RefPtr<const SourceStyleScheme> gtksourceview::SourceBuffer::get_style_scheme | ( |  | ) | const

Returns: the Gtk::SourceStyleScheme set by

Returns:
  The Gtk::SourceStyleScheme set by set_style_scheme(), or `0`.

Glib::RefPtr<SourceMark> gtksourceview::SourceBuffer::create_source_mark | ( | const Glib::ustring & | name,
|  | const Glib::ustring & | category,
|  | const Gtk::TextIter & | where |
| ) |  |  |

Glib::SListHandle<Glib::RefPtr<SourceMark> > gtksourceview::SourceBuffer::get_source_marks_at_line | ( | int | line,
|  | const Glib::ustring & | category |
| ) |  |  | const

Glib::SListHandle<Glib::RefPtr<SourceMark> > gtksourceview::SourceBuffer::get_source_marks_at_line | ( | int | line | ) | const

Glib::SListHandle<Glib::RefPtr<SourceMark> > gtksourceview::SourceBuffer::get_source_marks_at_iter | ( | Gtk::TextIter & | iter,
|  | const Glib::ustring & | category |
| ) |  |  | const

Glib::SListHandle<Glib::RefPtr<SourceMark> > gtksourceview::SourceBuffer::get_source_marks_at_iter | ( | Gtk::TextIter & | iter | ) | const

void gtksourceview::SourceBuffer::remove_source_marks | ( | const Gtk::TextIter & | start,
|  | const Gtk::TextIter & | end,
|  | const Glib::ustring & | category |
| ) |  |  |

Glib::SignalProxy2< void,Gtk::TextIter&,Gtk::TextIter& > gtksourceview::SourceBuffer::signal_highlight_updated | ( |  | ) |

Emitted whenever there is a change in the buffer's ability to redo an operation.

parameter can_redo: true if the buffer can now perform a redo, false otherwise. Emitted whenever there is a change in the buffer's ability to undo an operation. parameter can_undo: true if the buffer can now perfom an undo, false otherwise. Emitted whenever the syntax highlighting information has been updated, so that views can request a redraw if the region changed is visible. Usually only view widgets displaying this buffer will be interested in this signal. parameter start: an iterator at the start of the updated region. parameter end: and iterator at the end of the updated region.

Prototype:
  `void on_my_highlight_updated(Gtk::TextIter& start, Gtk::TextIter& end)`

## Friends And Related Function Documentation

friend class SourceBuffer_Class`[friend]`

Glib::RefPtr< gtksourceview::SourceBuffer > wrap | ( | GtkSourceBuffer * | 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:

- sourcebuffer.h