Trait gtk4::prelude::TextBufferExt

source · 
pub trait TextBufferExt: 'static {

Show 88 methods    fn add_mark(&self, mark: &impl IsA<TextMark>, where_: &TextIter);
    fn add_selection_clipboard(&self, clipboard: &Clipboard);
    fn apply_tag(&self, tag: &impl IsA<TextTag>, start: &TextIter, end: &TextIter);
    fn apply_tag_by_name(&self, name: &str, start: &TextIter, end: &TextIter);
    fn backspace(
        &self,
        iter: &mut TextIter,
        interactive: bool,
        default_editable: bool
    ) -> bool;
    fn begin_irreversible_action(&self);
    fn begin_user_action(&self);
    fn copy_clipboard(&self, clipboard: &Clipboard);
    fn create_child_anchor(&self, iter: &mut TextIter) -> TextChildAnchor;
    fn create_mark(
        &self,
        mark_name: Option<&str>,
        where_: &TextIter,
        left_gravity: bool
    ) -> TextMark;
    fn cut_clipboard(&self, clipboard: &Clipboard, default_editable: bool);
    fn delete(&self, start: &mut TextIter, end: &mut TextIter);
    fn delete_interactive(
        &self,
        start_iter: &mut TextIter,
        end_iter: &mut TextIter,
        default_editable: bool
    ) -> bool;
    fn delete_mark(&self, mark: &impl IsA<TextMark>);
    fn delete_mark_by_name(&self, name: &str);
    fn delete_selection(&self, interactive: bool, default_editable: bool) -> bool;
    fn end_irreversible_action(&self);
    fn end_user_action(&self);
    fn bounds(&self) -> (TextIter, TextIter);
    fn can_redo(&self) -> bool;
    fn can_undo(&self) -> bool;
    fn char_count(&self) -> i32;
    fn enables_undo(&self) -> bool;
    fn end_iter(&self) -> TextIter;
    fn has_selection(&self) -> bool;
    fn get_insert(&self) -> TextMark;
    fn iter_at_child_anchor(
        &self,
        anchor: &impl IsA<TextChildAnchor>
    ) -> TextIter;
    fn iter_at_line(&self, line_number: i32) -> Option<TextIter>;
    fn iter_at_line_index(
        &self,
        line_number: i32,
        byte_index: i32
    ) -> Option<TextIter>;
    fn iter_at_line_offset(
        &self,
        line_number: i32,
        char_offset: i32
    ) -> Option<TextIter>;
    fn iter_at_mark(&self, mark: &impl IsA<TextMark>) -> TextIter;
    fn iter_at_offset(&self, char_offset: i32) -> TextIter;
    fn line_count(&self) -> i32;
    fn mark(&self, name: &str) -> Option<TextMark>;
    fn max_undo_levels(&self) -> u32;
    fn is_modified(&self) -> bool;
    fn selection_bound(&self) -> TextMark;
    fn selection_bounds(&self) -> Option<(TextIter, TextIter)>;
    fn selection_content(&self) -> ContentProvider;
    fn slice(
        &self,
        start: &TextIter,
        end: &TextIter,
        include_hidden_chars: bool
    ) -> GString;
    fn start_iter(&self) -> TextIter;
    fn tag_table(&self) -> TextTagTable;
    fn text(
        &self,
        start: &TextIter,
        end: &TextIter,
        include_hidden_chars: bool
    ) -> GString;
    fn insert(&self, iter: &mut TextIter, text: &str);
    fn insert_at_cursor(&self, text: &str);
    fn insert_child_anchor(
        &self,
        iter: &mut TextIter,
        anchor: &impl IsA<TextChildAnchor>
    );
    fn insert_interactive(
        &self,
        iter: &mut TextIter,
        text: &str,
        default_editable: bool
    ) -> bool;
    fn insert_interactive_at_cursor(
        &self,
        text: &str,
        default_editable: bool
    ) -> bool;
    fn insert_markup(&self, iter: &mut TextIter, markup: &str);
    fn insert_paintable(
        &self,
        iter: &mut TextIter,
        paintable: &impl IsA<Paintable>
    );
    fn insert_range(&self, iter: &mut TextIter, start: &TextIter, end: &TextIter);
    fn insert_range_interactive(
        &self,
        iter: &mut TextIter,
        start: &TextIter,
        end: &TextIter,
        default_editable: bool
    ) -> bool;
    fn move_mark(&self, mark: &impl IsA<TextMark>, where_: &TextIter);
    fn move_mark_by_name(&self, name: &str, where_: &TextIter);
    fn paste_clipboard(
        &self,
        clipboard: &Clipboard,
        override_location: Option<&TextIter>,
        default_editable: bool
    );
    fn place_cursor(&self, where_: &TextIter);
    fn redo(&self);
    fn remove_all_tags(&self, start: &TextIter, end: &TextIter);
    fn remove_selection_clipboard(&self, clipboard: &Clipboard);
    fn remove_tag(&self, tag: &impl IsA<TextTag>, start: &TextIter, end: &TextIter);
    fn remove_tag_by_name(&self, name: &str, start: &TextIter, end: &TextIter);
    fn select_range(&self, ins: &TextIter, bound: &TextIter);
    fn set_enable_undo(&self, enable_undo: bool);
    fn set_max_undo_levels(&self, max_undo_levels: u32);
    fn set_modified(&self, setting: bool);
    fn set_text(&self, text: &str);
    fn undo(&self);
    fn cursor_position(&self) -> i32;
    fn connect_apply_tag<F: Fn(&Self, &TextTag, &TextIter, &TextIter) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_begin_user_action<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_changed<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
    fn connect_delete_range<F: Fn(&Self, &TextIter, &TextIter) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_end_user_action<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_insert_child_anchor<F: Fn(&Self, &TextIter, &TextChildAnchor) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_insert_paintable<F: Fn(&Self, &TextIter, &Paintable) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_mark_deleted<F: Fn(&Self, &TextMark) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_mark_set<F: Fn(&Self, &TextIter, &TextMark) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_modified_changed<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_paste_done<F: Fn(&Self, &Clipboard) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_redo<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
    fn connect_remove_tag<F: Fn(&Self, &TextTag, &TextIter, &TextIter) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_undo<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId;
    fn connect_can_redo_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_can_undo_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_cursor_position_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_enable_undo_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_has_selection_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
    fn connect_text_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;

}
Expand description

Trait containing all TextBuffer methods.

Implementors

TextBuffer

Required Methods§

Adds the mark at position @where_.

The mark must not be added to another buffer, and if its name is not None then there must not be another mark in the buffer with the same name.

Emits the signal::TextBuffer::mark-set signal as notification of the mark’s initial placement.

mark

the mark to add

where_

location to place mark

Adds @clipboard to the list of clipboards in which the selection contents of @self are available.

In most cases, @clipboard will be the gdk::Clipboard returned by WidgetExt::primary_clipboard() for a view of @self.

clipboard

a gdk::Clipboard

Emits the “apply-tag” signal on @self.

The default handler for the signal applies @tag to the given range. @start and @end do not have to be in order.

tag

a TextTag

start

one bound of range to be tagged

end

other bound of range to be tagged

Emits the “apply-tag” signal on @self.

Calls TextTagTable::lookup() on the buffer’s tag table to get a TextTag, then calls apply_tag().

name

name of a named TextTag

start

one bound of range to be tagged

end

other bound of range to be tagged

Performs the appropriate action as if the user hit the delete key with the cursor at the position specified by @iter.

In the normal case a single character will be deleted, but when combining accents are involved, more than one character can be deleted, and when precomposed character and accent combinations are involved, less than one character will be deleted.

Because the buffer is modified, all outstanding iterators become invalid after calling this function; however, the @iter will be re-initialized to point to the location where text was deleted.

iter

a position in @self

interactive

whether the deletion is caused by user interaction

default_editable

whether the buffer is editable by default

Returns

true if the buffer was modified

Denotes the beginning of an action that may not be undone.

This will cause any previous operations in the undo/redo queue to be cleared.

This should be paired with a call to end_irreversible_action() after the irreversible action has completed.

You may nest calls to gtk_text_buffer_begin_irreversible_action() and gtk_text_buffer_end_irreversible_action() pairs.

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. TextBuffer 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 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.

Copies the currently-selected text to a clipboard.

clipboard

the gdk::Clipboard object to copy to

Creates and inserts a child anchor.

This is a convenience function which simply creates a child anchor with TextChildAnchor::new() and inserts it into the buffer with insert_child_anchor().

The new anchor is owned by the buffer; no reference count is returned to the caller of this function.

iter

location in the buffer

Returns

the created child anchor

Creates a mark at position @where_.

If @mark_name is None, the mark is anonymous; otherwise, the mark can be retrieved by name using 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 TextMark, 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 signal::TextBuffer::mark-set signal as notification of the mark’s initial placement.

mark_name

name for mark

where_

location to place mark

left_gravity

whether the mark has left gravity

Returns

the new TextMark object

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

clipboard

the gdk::Clipboard object to cut to

default_editable

default editability of the buffer

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.

start

a position in @self

end

another position in @self

Deletes all editable text in the given range.

Calls 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.

start_iter

start of range to delete

end_iter

end of range

default_editable

whether the buffer is editable by default

Returns

whether some text was actually deleted

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, until it gets added to a buffer again with add_mark(). Use TextMarkExt::is_deleted() to find out if a mark has been removed from its buffer.

The signal::TextBuffer::mark-deleted signal will be emitted as notification after the mark is deleted.

mark

a TextMark in @self

Deletes the mark named @name; the mark must exist.

See delete_mark() for details.

name

name of a mark in @self

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).

interactive

whether the deletion is caused by user interaction

default_editable

whether the buffer is editable by default

Returns

whether there was a non-empty selection to delete

Denotes the end of an action that may not be undone.

This will cause any previous operations in the undo/redo queue to be cleared.

This should be called after completing modifications to the text buffer after begin_irreversible_action() was called.

You may nest calls to gtk_text_buffer_begin_irreversible_action() and gtk_text_buffer_end_irreversible_action() pairs.

Ends a user-visible operation.

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

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

Returns
start

iterator to initialize with first position in the buffer

end

iterator to initialize with the end iterator

Gets whether there is a redoable action in the history.

Returns

true if there is an redoable action

Gets whether there is an undoable action in the history.

Returns

true if there is an undoable action

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.

Returns

number of characters in the buffer

Gets whether the buffer is saving modifications to the buffer to allow for undo and redo actions.

See begin_irreversible_action() and end_irreversible_action() to create changes to the buffer that cannot be undone.

Initializes @iter with the “end iterator,” one past the last valid character in the text buffer.

If dereferenced with TextIter::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 start_iter() to get character position 0) to the end iterator.

Returns
iter

iterator to initialize

Indicates whether the buffer has some text currently selected.

Returns

true if the there is text selected

Returns the mark that represents the cursor (insertion point).

Equivalent to calling mark() to get the mark named “insert”, but very slightly more efficient, and involves less typing.

Returns

insertion point mark

Obtains the location of @anchor within @self.

anchor

a child anchor that appears in @self

Returns
iter

an iterator to be initialized

Initializes @iter to the start of the given line.

If @line_number is greater than or equal to the number of lines in the @self, the end iterator is returned.

line_number

line number counting from 0

Returns

whether the exact position has been found

iter

iterator to initialize

Obtains an iterator pointing to @byte_index within the given line.

@byte_index must be the start of a UTF-8 character. Note bytes, not characters; UTF-8 may encode one character as multiple bytes.

If @line_number is greater than or equal to the number of lines in the @self, the end iterator is returned. And if @byte_index is off the end of the line, the iterator at the end of the line is returned.

line_number

line number counting from 0

byte_index

byte index from start of line

Returns

whether the exact position has been found

iter

iterator to initialize

Obtains an iterator pointing to @char_offset within the given line.

Note characters, not bytes; UTF-8 may encode one character as multiple bytes.

If @line_number is greater than or equal to the number of lines in the @self, the end iterator is returned. And if @char_offset is off the end of the line, the iterator at the end of the line is returned.

line_number

line number counting from 0

char_offset

char offset from start of line

Returns

whether the exact position has been found

iter

iterator to initialize

Initializes @iter with the current position of @mark.

mark

a TextMark in @self

Returns
iter

iterator to initialize

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.

char_offset

char offset from start of buffer, counting from 0, or -1

Returns
iter

iterator to initialize

Obtains the number of lines in the buffer.

This value is cached, so the function is very fast.

Returns

number of lines in the buffer

Returns the mark named @name in buffer @self, or None if no such mark exists in the buffer.

name

a mark name

Returns

a TextMark

Gets the maximum number of undo levels to perform.

If 0, unlimited undo actions may be performed. Note that this may have a memory usage impact as it requires storing an additional copy of the inserted or removed text within the text buffer.

Indicates whether the buffer has been modified since the last call to set_modified() set the modification flag to false.

Used for example to enable a “save” function in a text editor.

Returns

true if the buffer has been modified

Returns the mark that represents the selection bound.

Equivalent to calling mark() to get the mark named “selection_bound”, but very slightly more efficient, and involves less typing.

The currently-selected text in @self 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. 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.

Returns

selection bound mark

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 None, then they are not filled in, but the return value still indicates whether text is selected.

Returns

whether the selection has nonzero length

start

iterator to initialize with selection start

end

iterator to initialize with selection end

source

fn selection_content(&self) -> ContentProvider

Get a content provider for this buffer.

It can be used to make the content of @self available in a gdk::Clipboard, see Clipboard::set_content().

Returns

a new gdk::ContentProvider.

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 text(). Note that 0xFFFC can occur in normal text as well, so it is not a reliable indicator that a paintable or widget is in the buffer.

start

start of a range

end

end of a range

include_hidden_chars

whether to include invisible text

Returns

an allocated UTF-8 string

Initialized @iter with the first position in the text buffer.

This is the same as using iter_at_offset() to get the iter at character offset 0.

Returns
iter

iterator to initialize

Get the TextTagTable associated with this buffer.

Returns

the buffer’s tag table

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 slice().

start

start of a range

end

end of a range

include_hidden_chars

whether to include invisible text

Returns

an allocated UTF-8 string

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.

iter

a position in the buffer

text

text in UTF-8 format

len

length of text in bytes, or -1

Inserts @text in @self.

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

text

text in UTF-8 format

len

length of text, in bytes

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 slice() and text().

Consider 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.

iter

location to insert the anchor

anchor

a TextChildAnchor

Inserts @text in @self.

Like 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 TextViewExt::is_editable() is appropriate here.

iter

a position in @self

text

some UTF-8 text

len

length of text in bytes, or -1

default_editable

default editability of buffer

Returns

whether text was actually inserted

Inserts @text in @self.

Calls 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 TextViewExt::is_editable() is appropriate here.

text

text in UTF-8 format

len

length of text in bytes, or -1

default_editable

default editability of buffer

Returns

whether text was actually inserted

Inserts the text in @markup at position @iter.

@markup will be inserted in its entirety and must be nul-terminated and valid UTF-8. Emits the signal::TextBuffer::insert-text signal, possibly multiple times; insertion actually occurs in the default handler for the signal. @iter will point to the end of the inserted text on return.

iter

location to insert the markup

markup

a nul-terminated UTF-8 string containing Pango markup

len

length of @markup in bytes, or -1

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 paintable, but the “text” variants do not. e.g. see slice() and text().

iter

location to insert the paintable

paintable

a gdk::Paintable

Copies text, tags, and paintables between @start and @end and inserts the copy at @iter.

The order of @start and @end doesn’t matter.

Used instead of simply getting/inserting text because it preserves images and tags. If @start and @end are in a different buffer from @self, the two buffers must share the same tag table.

Implemented via emissions of the ::insert-text and ::apply-tag signals, so expect those.

iter

a position in @self

start

a position in a TextBuffer

end

another position in the same buffer as @start

Copies text, tags, and paintables between @start and @end and inserts the copy at @iter.

Same as 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 TextViewExt::is_editable() is appropriate here.

iter

a position in @self

start

a position in a TextBuffer

end

another position in the same buffer as @start

default_editable

default editability of the buffer

Returns

whether an insertion was possible at @iter

Moves @mark to the new location @where_.

Emits the signal::TextBuffer::mark-set signal as notification of the move.

mark

a TextMark

where_

new location for @mark in @self

Moves the mark named @name (which must exist) to location @where_.

See move_mark() for details.

name

name of a mark

where_

new location for mark

Pastes the contents of a clipboard.

If @override_location is None, the pasted text will be inserted at the cursor position, or the buffer selection will be replaced if the selection is non-empty.

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.

clipboard

the gdk::Clipboard to paste from

override_location

location to insert pasted text

default_editable

whether the buffer is editable by default

This function moves the “insert” and “selection_bound” marks simultaneously.

If you move them to the same place in two steps with 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.

where_

where to put the cursor

Redoes the next redoable action on the buffer, if there is one.

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.

start

one bound of range to be untagged

end

other bound of range to be untagged

Removes a gdk::Clipboard added with gtk_text_buffer_add_selection_clipboard().

clipboard

a gdk::Clipboard added to @self by add_selection_clipboard()

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.

tag

a TextTag

start

one bound of range to be untagged

end

other bound of range to be untagged

Emits the “remove-tag” signal.

Calls TextTagTable::lookup() on the buffer’s tag table to get a TextTag, then calls remove_tag().

name

name of a TextTag

start

one bound of range to be untagged

end

other bound of range to be untagged

This function moves the “insert” and “selection_bound” marks simultaneously.

If you move them in two steps with 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.

ins

where to put the “insert” mark

bound

where to put the “selection_bound” mark

Sets whether or not to enable undoable actions in the text buffer.

Undoable actions in this context are changes to the text content of the buffer. Changes to tags and marks are not tracked.

If enabled, the user will be able to undo the last number of actions up to max_undo_levels().

See begin_irreversible_action() and end_irreversible_action() to create changes to the buffer that cannot be undone.

enable_undo

true to enable undo

Sets the maximum number of undo levels to perform.

If 0, unlimited undo actions may be performed. Note that this may have a memory usage impact as it requires storing an additional copy of the inserted or removed text within the text buffer.

max_undo_levels

the maximum number of undo actions to perform

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 (@self, FALSE). When the buffer is modified, it will automatically toggled on the modified bit again. When the modified bit flips, the buffer emits the signal::TextBuffer::modified-changed signal.

setting

modification flag setting

source

fn set_text(&self, text: &str)

Deletes current contents of @self, and inserts @text instead. This is automatically marked as an irreversible action in the undo stack. If you wish to mark this action as part of a larger undo operation, call delete() and insert() directly instead.

If @len is -1, @text must be nul-terminated. @text must be valid UTF-8.

text

UTF-8 text to insert

len

length of @text in bytes

Undoes the last undoable action on the buffer, if there is one.

The position of the insert mark.

This is an offset from the beginning of the buffer. It is useful for getting notified when the cursor moves.

Emitted to apply a tag to a range of text in a TextBuffer.

Applying actually occurs in the default handler.

Note that if your handler runs before the default handler it must not invalidate the @start and @end iters (or has to revalidate them).

See also: apply_tag(), TextBufferExtManual::insert_with_tags(), insert_range().

tag

the applied tag

start

the start of the range the tag is applied to

end

the end of the range the tag is applied to

Emitted at the beginning of a single user-visible operation on a TextBuffer.

See also: begin_user_action(), insert_interactive(), insert_range_interactive(), delete_interactive(), backspace(), delete_selection().

Emitted when the content of a TextBuffer has changed.

Emitted to delete a range from a TextBuffer.

Note that if your handler runs before the default handler it must not invalidate the @start and @end iters (or has to revalidate them). The default signal handler revalidates the @start and @end iters to both point to the location where text was deleted. Handlers which run after the default handler (see g_signal_connect_after()) do not have access to the deleted text.

See also: delete().

start

the start of the range to be deleted

end

the end of the range to be deleted

Emitted at the end of a single user-visible operation on the TextBuffer.

See also: end_user_action(), insert_interactive(), insert_range_interactive(), delete_interactive(), backspace(), delete_selection(), backspace().

Emitted to insert a TextChildAnchor in a TextBuffer.

Insertion actually occurs in the default handler.

Note that if your handler runs before the default handler it must not invalidate the @location iter (or has to revalidate it). The default signal handler revalidates it to be placed after the inserted @anchor.

See also: insert_child_anchor().

location

position to insert @anchor in @textbuffer

anchor

the TextChildAnchor to be inserted

Emitted to insert a gdk::Paintable in a TextBuffer.

Insertion actually occurs in the default handler.

Note that if your handler runs before the default handler it must not invalidate the @location iter (or has to revalidate it). The default signal handler revalidates it to be placed after the inserted @paintable.

See also: insert_paintable().

location

position to insert @paintable in @textbuffer

paintable

the gdk::Paintable to be inserted

Emitted as notification after a TextMark is deleted.

See also: delete_mark().

mark

The mark that was deleted

Emitted as notification after a TextMark is set.

See also: create_mark(), move_mark().

location

The location of @mark in @textbuffer

mark

The mark that is set

Emitted when the modified bit of a TextBuffer flips.

See also: set_modified().

Emitted after paste operation has been completed.

This is useful to properly scroll the view to the end of the pasted text. See paste_clipboard() for more details.

clipboard

the gdk::Clipboard pasted from

Emitted when a request has been made to redo the previously undone operation.

Emitted to remove all occurrences of @tag from a range of text in a TextBuffer.

Removal actually occurs in the default handler.

Note that if your handler runs before the default handler it must not invalidate the @start and @end iters (or has to revalidate them).

See also: remove_tag().

tag

the tag to be removed

start

the start of the range the tag is removed from

end

the end of the range the tag is removed from

Emitted when a request has been made to undo the previous operation or set of operations that have been grouped together.

source

fn connect_text_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Implementors§