struct GtkTextBuffer

struct GtkTextBuffer;

gtk_text_buffer_new ()

GtkTextBuffer* gtk_text_buffer_new          (GtkTextTagTable *table);

Creates a new text buffer.

gtk_text_buffer_get_line_count ()

gint        gtk_text_buffer_get_line_count  (GtkTextBuffer *buffer);

Obtains the number of lines in the buffer. This value is cached, so the function is very fast.

gtk_text_buffer_get_char_count ()

gint        gtk_text_buffer_get_char_count  (GtkTextBuffer *buffer);

Gets the number of characters in the buffer; note that characters and bytes are not the same, you can't e.g. expect the contents of the buffer in string form to be this many bytes long. The character count is cached, so this function is very fast.

gtk_text_buffer_get_tag_table ()

GtkTextTagTable* gtk_text_buffer_get_tag_table
                                            (GtkTextBuffer *buffer);

Get the GtkTextTagTable associated with this buffer.

gtk_text_buffer_insert ()

void        gtk_text_buffer_insert          (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             const gchar *text,
                                             gint len);

Inserts len bytes of text at position iter. If len is -1, text must be nul-terminated and will be inserted in its entirety. Emits the "insert_text" signal; insertion actually occurs in the default handler for the signal. iter is invalidated when insertion occurs (because the buffer contents change), but the default signal handler revalidates it to point to the end of the inserted text.

gtk_text_buffer_insert_at_cursor ()

void        gtk_text_buffer_insert_at_cursor
                                            (GtkTextBuffer *buffer,
                                             const gchar *text,
                                             gint len);

Simply calls gtk_text_buffer_insert(), using the current cursor position as the insertion point.

gtk_text_buffer_insert_interactive ()

gboolean    gtk_text_buffer_insert_interactive
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             const gchar *text,
                                             gint len,
                                             gboolean default_editable);

Like gtk_text_buffer_insert(), but the insertion will not occur if iter is at a non-editable location in the buffer. Usually you want to prevent insertions at ineditable locations if the insertion results from a user action (is interactive).

default_editable indicates the editability of text that doesn't have a tag affecting editability applied to it. Typically the result of gtk_text_view_get_editable() is appropriate here.

gtk_text_buffer_insert_interactive_at_cursor ()

gboolean    gtk_text_buffer_insert_interactive_at_cursor
                                            (GtkTextBuffer *buffer,
                                             const gchar *text,
                                             gint len,
                                             gboolean default_editable);

Calls gtk_text_buffer_insert_interactive() at the cursor position.

default_editable indicates the editability of text that doesn't have a tag affecting editability applied to it. Typically the result of gtk_text_view_get_editable() is appropriate here.

gtk_text_buffer_insert_range ()

void        gtk_text_buffer_insert_range    (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end);

Copies text, tags, and pixbufs between start and end (the order of start and end doesn't matter) and inserts the copy at iter. Used instead of simply getting/inserting text because it preserves images and tags. If start and end are in a different buffer from buffer, the two buffers must share the same tag table.

Implemented via emissions of the insert_text and apply_tag signals, so expect those.

gtk_text_buffer_insert_range_interactive ()

gboolean    gtk_text_buffer_insert_range_interactive
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end,
                                             gboolean default_editable);

Same as gtk_text_buffer_insert_range(), but does nothing if the insertion point isn't editable. The default_editable parameter indicates whether the text is editable at iter if no tags enclosing iter affect editability. Typically the result of gtk_text_view_get_editable() is appropriate here.

gtk_text_buffer_insert_with_tags ()

void        gtk_text_buffer_insert_with_tags
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             const gchar *text,
                                             gint len,
                                             GtkTextTag *first_tag,
                                             ...);

Inserts text into buffer at iter, applying the list of tags to the newly-inserted text. The last tag specified must be NULL to terminate the list. Equivalent to calling gtk_text_buffer_insert(), then gtk_text_buffer_apply_tag() on the inserted text; gtk_text_buffer_insert_with_tags() is just a convenience function.

gtk_text_buffer_insert_with_tags_by_name ()

void        gtk_text_buffer_insert_with_tags_by_name
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             const gchar *text,
                                             gint len,
                                             const gchar *first_tag_name,
                                             ...);

Same as gtk_text_buffer_insert_with_tags(), but allows you to pass in tag names instead of tag objects.

gtk_text_buffer_delete ()

void        gtk_text_buffer_delete          (GtkTextBuffer *buffer,
                                             GtkTextIter *start,
                                             GtkTextIter *end);

Deletes text between start and end. The order of start and end is not actually relevant; gtk_text_buffer_delete() will reorder them. This function actually emits the "delete_range" signal, and the default handler of that signal deletes the text. Because the buffer is modified, all outstanding iterators become invalid after calling this function; however, the start and end will be re-initialized to point to the location where text was deleted.

gtk_text_buffer_delete_interactive ()

gboolean    gtk_text_buffer_delete_interactive
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *start_iter,
                                             GtkTextIter *end_iter,
                                             gboolean default_editable);

Deletes all editable text in the given range. Calls gtk_text_buffer_delete() for each editable sub-range of [start,end). start and end are revalidated to point to the location of the last deleted range, or left untouched if no text was deleted.

gtk_text_buffer_set_text ()

void        gtk_text_buffer_set_text        (GtkTextBuffer *buffer,
                                             const gchar *text,
                                             gint len);

Deletes current contents of buffer, and inserts text instead. If len is -1, text must be nul-terminated. text must be valid UTF-8.

gtk_text_buffer_get_text ()

gchar*      gtk_text_buffer_get_text        (GtkTextBuffer *buffer,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end,
                                             gboolean include_hidden_chars);

Returns the text in the range [start,end). Excludes undisplayed text (text marked with tags that set the invisibility attribute) if include_hidden_chars is FALSE. Does not include characters representing embedded images, so byte and character indexes into the returned string do not correspond to byte and character indexes into the buffer. Contrast with gtk_text_buffer_get_slice().

gtk_text_buffer_get_slice ()

gchar*      gtk_text_buffer_get_slice       (GtkTextBuffer *buffer,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end,
                                             gboolean include_hidden_chars);

Returns the text in the range [start,end). Excludes undisplayed text (text marked with tags that set the invisibility attribute) if include_hidden_chars is FALSE. The returned string includes a 0xFFFC character whenever the buffer contains embedded images, so byte and character indexes into the returned string do correspond to byte and character indexes into the buffer. Contrast with gtk_text_buffer_get_text(). Note that 0xFFFC can occur in normal text as well, so it is not a reliable indicator that a pixbuf or widget is in the buffer.

gtk_text_buffer_insert_pixbuf ()

void        gtk_text_buffer_insert_pixbuf   (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             GdkPixbuf *pixbuf);

Inserts an image into the text buffer at iter. The image will be counted as one character in character counts, and when obtaining the buffer contents as a string, will be represented by the Unicode "object replacement character" 0xFFFC. Note that the "slice" variants for obtaining portions of the buffer as a string include this character for pixbufs, but the "text" variants do not. e.g. see gtk_text_buffer_get_slice() and gtk_text_buffer_get_text().

gtk_text_buffer_insert_child_anchor ()

void        gtk_text_buffer_insert_child_anchor
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             GtkTextChildAnchor *anchor);

Inserts a child widget anchor into the text buffer at iter. The anchor will be counted as one character in character counts, and when obtaining the buffer contents as a string, will be represented by the Unicode "object replacement character" 0xFFFC. Note that the "slice" variants for obtaining portions of the buffer as a string include this character for child anchors, but the "text" variants do not. e.g. see gtk_text_buffer_get_slice() and gtk_text_buffer_get_text(). Consider gtk_text_buffer_create_child_anchor() as a more convenient alternative to this function. The buffer will add a reference to the anchor, so you can unref it after insertion.

gtk_text_buffer_create_child_anchor ()

GtkTextChildAnchor* gtk_text_buffer_create_child_anchor
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter);

This is a convenience function which simply creates a child anchor with gtk_text_child_anchor_new() and inserts it into the buffer with gtk_text_buffer_insert_child_anchor(). The new anchor is owned by the buffer; no reference count is returned to the caller of gtk_text_buffer_create_child_anchor().

gtk_text_buffer_create_mark ()

GtkTextMark* gtk_text_buffer_create_mark    (GtkTextBuffer *buffer,
                                             const gchar *mark_name,
                                             const GtkTextIter *where,
                                             gboolean left_gravity);

Creates a mark at position where. If mark_name is NULL, the mark is anonymous; otherwise, the mark can be retrieved by name using gtk_text_buffer_get_mark(). If a mark has left gravity, and text is inserted at the mark's current location, the mark will be moved to the left of the newly-inserted text. If the mark has right gravity (left_gravity = FALSE), the mark will end up on the right of newly-inserted text. The standard left-to-right cursor is a mark with right gravity (when you type, the cursor stays on the right side of the text you're typing).

The caller of this function does not own a reference to the returned GtkTextMark, so you can ignore the return value if you like. Marks are owned by the buffer and go away when the buffer does.

Emits the "mark_set" signal as notification of the mark's initial placement.

gtk_text_buffer_move_mark ()

void        gtk_text_buffer_move_mark       (GtkTextBuffer *buffer,
                                             GtkTextMark *mark,
                                             const GtkTextIter *where);

Moves mark to the new location where. Emits the "mark_set" signal as notification of the move.

gtk_text_buffer_move_mark_by_name ()

void        gtk_text_buffer_move_mark_by_name
                                            (GtkTextBuffer *buffer,
                                             const gchar *name,
                                             const GtkTextIter *where);

Moves the mark named name (which must exist) to location where. See gtk_text_buffer_move_mark() for details.

gtk_text_buffer_delete_mark ()

void        gtk_text_buffer_delete_mark     (GtkTextBuffer *buffer,
                                             GtkTextMark *mark);

Deletes mark, so that it's no longer located anywhere in the buffer. Removes the reference the buffer holds to the mark, so if you haven't called g_object_ref() on the mark, it will be freed. Even if the mark isn't freed, most operations on mark become invalid. There is no way to undelete a mark. gtk_text_mark_get_deleted() will return TRUE after this function has been called on a mark; gtk_text_mark_get_deleted() indicates that a mark no longer belongs to a buffer. The "mark_deleted" signal will be emitted as notification after the mark is deleted.

gtk_text_buffer_delete_mark_by_name ()

void        gtk_text_buffer_delete_mark_by_name
                                            (GtkTextBuffer *buffer,
                                             const gchar *name);

Deletes the mark named name; the mark must exist. See gtk_text_buffer_delete_mark() for details.

gtk_text_buffer_get_mark ()

GtkTextMark* gtk_text_buffer_get_mark       (GtkTextBuffer *buffer,
                                             const gchar *name);

Returns the mark named name in buffer buffer, or NULL if no such mark exists in the buffer.

gtk_text_buffer_get_insert ()

GtkTextMark* gtk_text_buffer_get_insert     (GtkTextBuffer *buffer);

Returns the mark that represents the cursor (insertion point). Equivalent to calling gtk_text_buffer_get_mark() to get the mark named "insert", but very slightly more efficient, and involves less typing.

gtk_text_buffer_get_selection_bound ()

GtkTextMark* gtk_text_buffer_get_selection_bound
                                            (GtkTextBuffer *buffer);

Returns the mark that represents the selection bound. Equivalent to calling gtk_text_buffer_get_mark() to get the mark named "selection_bound", but very slightly more efficient, and involves less typing.

The currently-selected text in buffer is the region between the "selection_bound" and "insert" marks. If "selection_bound" and "insert" are in the same place, then there is no current selection. gtk_text_buffer_get_selection_bounds() is another convenient function for handling the selection, if you just want to know whether there's a selection and what its bounds are.

gtk_text_buffer_place_cursor ()

void        gtk_text_buffer_place_cursor    (GtkTextBuffer *buffer,
                                             const GtkTextIter *where);

This function moves the "insert" and "selection_bound" marks simultaneously. If you move them to the same place in two steps with gtk_text_buffer_move_mark(), you will temporarily select a region in between their old and new locations, which can be pretty inefficient since the temporarily-selected region will force stuff to be recalculated. This function moves them as a unit, which can be optimized.

gtk_text_buffer_apply_tag ()

void        gtk_text_buffer_apply_tag       (GtkTextBuffer *buffer,
                                             GtkTextTag *tag,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end);

Emits the "apply_tag" signal on buffer. The default handler for the signal applies tag to the given range. start and end do not have to be in order.

gtk_text_buffer_remove_tag ()

void        gtk_text_buffer_remove_tag      (GtkTextBuffer *buffer,
                                             GtkTextTag *tag,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end);

Emits the "remove_tag" signal. The default handler for the signal removes all occurrences of tag from the given range. start and end don't have to be in order.

gtk_text_buffer_apply_tag_by_name ()

void        gtk_text_buffer_apply_tag_by_name
                                            (GtkTextBuffer *buffer,
                                             const gchar *name,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end);

Calls gtk_text_tag_table_lookup() on the buffer's tag table to get a GtkTextTag, then calls gtk_text_buffer_apply_tag().

gtk_text_buffer_remove_tag_by_name ()

void        gtk_text_buffer_remove_tag_by_name
                                            (GtkTextBuffer *buffer,
                                             const gchar *name,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end);

Calls gtk_text_tag_table_lookup() on the buffer's tag table to get a GtkTextTag, then calls gtk_text_buffer_remove_tag().

gtk_text_buffer_remove_all_tags ()

void        gtk_text_buffer_remove_all_tags (GtkTextBuffer *buffer,
                                             const GtkTextIter *start,
                                             const GtkTextIter *end);

Removes all tags in the range between start and end. Be careful with this function; it could remove tags added in code unrelated to the code you're currently writing. That is, using this function is probably a bad idea if you have two or more unrelated code sections that add tags.

gtk_text_buffer_create_tag ()

GtkTextTag* gtk_text_buffer_create_tag      (GtkTextBuffer *buffer,
                                             const gchar *tag_name,
                                             const gchar *first_property_name,
                                             ...);

Creates a tag and adds it to the tag table for buffer. Equivalent to calling gtk_text_tag_new() and then adding the tag to the buffer's tag table. The returned tag is owned by the buffer's tag table, so the ref count will be equal to one.

If tag_name is NULL, the tag is anonymous.

If tag_name is non-NULL, a tag called tag_name must not already exist in the tag table for this buffer.

The first_property_name argument and subsequent arguments are a list of properties to set on the tag, as with g_object_set().

gtk_text_buffer_get_iter_at_line_offset ()

void        gtk_text_buffer_get_iter_at_line_offset
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             gint line_number,
                                             gint char_offset);

Obtains an iterator pointing to char_offset within the given line. The char_offset must exist, offsets off the end of the line are not allowed. Note characters, not bytes; UTF-8 may encode one character as multiple bytes.

gtk_text_buffer_get_iter_at_offset ()

void        gtk_text_buffer_get_iter_at_offset
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             gint char_offset);

Initializes iter to a position char_offset chars from the start of the entire buffer. If char_offset is -1 or greater than the number of characters in the buffer, iter is initialized to the end iterator, the iterator one past the last valid character in the buffer.

gtk_text_buffer_get_iter_at_line ()

void        gtk_text_buffer_get_iter_at_line
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             gint line_number);

Initializes iter to the start of the given line.

gtk_text_buffer_get_iter_at_line_index ()

void        gtk_text_buffer_get_iter_at_line_index
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             gint line_number,
                                             gint byte_index);

Obtains an iterator pointing to byte_index within the given line. byte_index must be the start of a UTF-8 character, and must not be beyond the end of the line. Note bytes, not characters; UTF-8 may encode one character as multiple bytes.

gtk_text_buffer_get_iter_at_mark ()

void        gtk_text_buffer_get_iter_at_mark
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             GtkTextMark *mark);

Initializes iter with the current position of mark.

gtk_text_buffer_get_iter_at_child_anchor ()

void        gtk_text_buffer_get_iter_at_child_anchor
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *iter,
                                             GtkTextChildAnchor *anchor);

Obtains the location of anchor within buffer.

gtk_text_buffer_get_start_iter ()

void        gtk_text_buffer_get_start_iter  (GtkTextBuffer *buffer,
                                             GtkTextIter *iter);

Initialized iter with the first position in the text buffer. This is the same as using gtk_text_buffer_get_iter_at_offset() to get the iter at character offset 0.

gtk_text_buffer_get_end_iter ()

void        gtk_text_buffer_get_end_iter    (GtkTextBuffer *buffer,
                                             GtkTextIter *iter);

Initializes iter with the "end iterator," one past the last valid character in the text buffer. If dereferenced with gtk_text_iter_get_char(), the end iterator has a character value of 0. The entire buffer lies in the range from the first position in the buffer (call gtk_text_buffer_get_start_iter() to get character position 0) to the end iterator.

gtk_text_buffer_get_bounds ()

void        gtk_text_buffer_get_bounds      (GtkTextBuffer *buffer,
                                             GtkTextIter *start,
                                             GtkTextIter *end);

Retrieves the first and last iterators in the buffer, i.e. the entire buffer lies within the range [start,end).

gtk_text_buffer_get_modified ()

gboolean    gtk_text_buffer_get_modified    (GtkTextBuffer *buffer);

Indicates whether the buffer has been modified since the last call to gtk_text_buffer_set_modified() set the modification flag to FALSE. Used for example to enable a "save" function in a text editor.

gtk_text_buffer_set_modified ()

void        gtk_text_buffer_set_modified    (GtkTextBuffer *buffer,
                                             gboolean setting);

Used to keep track of whether the buffer has been modified since the last time it was saved. Whenever the buffer is saved to disk, call gtk_text_buffer_set_modified (buffer, FALSE). When the buffer is modified, it will automatically toggled on the modified bit again. When the modified bit flips, the buffer emits a "modified_changed" signal.

gtk_text_buffer_delete_selection ()

gboolean    gtk_text_buffer_delete_selection
                                            (GtkTextBuffer *buffer,
                                             gboolean interactive,
                                             gboolean default_editable);

Deletes the range between the "insert" and "selection_bound" marks, that is, the currently-selected text. If interactive is TRUE, the editability of the selection will be considered (users can't delete uneditable text).

gtk_text_buffer_paste_clipboard ()

void        gtk_text_buffer_paste_clipboard (GtkTextBuffer *buffer,
                                             GtkClipboard *clipboard,
                                             GtkTextIter *override_location,
                                             gboolean default_editable);

Pastes the contents of a clipboard at the insertion point, or at override_location. (Note: pasting is asynchronous, that is, we'll ask for the paste data and return, and at some point later after the main loop runs, the paste data will be inserted.)

gtk_text_buffer_copy_clipboard ()

void        gtk_text_buffer_copy_clipboard  (GtkTextBuffer *buffer,
                                             GtkClipboard *clipboard);

Copies the currently-selected text to a clipboard.

gtk_text_buffer_cut_clipboard ()

void        gtk_text_buffer_cut_clipboard   (GtkTextBuffer *buffer,
                                             GtkClipboard *clipboard,
                                             gboolean default_editable);

Copies the currently-selected text to a clipboard, then deletes said text if it's editable.

gtk_text_buffer_get_selection_bounds ()

gboolean    gtk_text_buffer_get_selection_bounds
                                            (GtkTextBuffer *buffer,
                                             GtkTextIter *start,
                                             GtkTextIter *end);

Returns TRUE if some text is selected; places the bounds of the selection in start and end (if the selection has length 0, then start and end are filled in with the same value). start and end will be in ascending order. If start and end are NULL, then they are not filled in, but the return value still indicates whether text is selected.

gtk_text_buffer_begin_user_action ()

void        gtk_text_buffer_begin_user_action
                                            (GtkTextBuffer *buffer);

Called to indicate that the buffer operations between here and a call to gtk_text_buffer_end_user_action() are part of a single user-visible operation. The operations between gtk_text_buffer_begin_user_action() and gtk_text_buffer_end_user_action() can then be grouped when creating an undo stack. GtkTextBuffer maintains a count of calls to gtk_text_buffer_begin_user_action() that have not been closed with a call to gtk_text_buffer_end_user_action(), and emits the "begin_user_action" and "end_user_action" signals only for the outermost pair of calls. This allows you to build user actions from other user actions.

The "interactive" buffer mutation functions, such as gtk_text_buffer_insert_interactive(), automatically call begin/end user action around the buffer operations they perform, so there's no need to add extra calls if you user action consists solely of a single call to one of those functions.

gtk_text_buffer_end_user_action ()

void        gtk_text_buffer_end_user_action (GtkTextBuffer *buffer);

Should be paired with a call to gtk_text_buffer_begin_user_action(). See that function for a full explanation.

gtk_text_buffer_add_selection_clipboard ()

void        gtk_text_buffer_add_selection_clipboard
                                            (GtkTextBuffer *buffer,
                                             GtkClipboard *clipboard);

Adds clipboard to the list of clipboards in which the selection contents of buffer are available. In most cases, clipboard will be the GtkClipboard of type GDK_SELECTION_PRIMARY for a view of buffer.

gtk_text_buffer_remove_selection_clipboard ()

void        gtk_text_buffer_remove_selection_clipboard
                                            (GtkTextBuffer *buffer,
                                             GtkClipboard *clipboard);

Removes a GtkClipboard added with gtk_text_buffer_add_selection_clipboard()

The "apply-tag" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextTag *arg1,
                                            GtkTextIter *arg2,
                                            GtkTextIter *arg3,
                                            gpointer user_data);

The "begin-user-action" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            gpointer user_data);

The "changed" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            gpointer user_data);

The "delete-range" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextIter *arg1,
                                            GtkTextIter *arg2,
                                            gpointer user_data);

The "end-user-action" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            gpointer user_data);

The "insert-child-anchor" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextIter *arg1,
                                            GtkTextChildAnchor *arg2,
                                            gpointer user_data);

The "insert-pixbuf" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextIter *arg1,
                                            GdkPixbuf *arg2,
                                            gpointer user_data);

The "insert-text" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextIter *arg1,
                                            gchar *arg2,
                                            gint arg3,
                                            gpointer user_data);

The "mark-deleted" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextMark *arg1,
                                            gpointer user_data);

The "mark-set" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextIter *arg1,
                                            GtkTextMark *arg2,
                                            gpointer user_data);

The "modified-changed" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            gpointer user_data);

The "remove-tag" signal

void        user_function                  (GtkTextBuffer *textbuffer,
                                            GtkTextTag *arg1,
                                            GtkTextIter *arg2,
                                            GtkTextIter *arg3,
                                            gpointer user_data);