Struct rat_widget::textarea::core::InputCore

pub struct InputCore { /* private fields */ }

Core for text editing.

Implementations

impl InputCore

pub fn new() -> Self

pub fn set_move_col(&mut self, col: Option<usize>)

Extra column information for cursor movement. The cursor position is capped to the current line length, so if you move up one row, you might end at a position left of the current column. If you move up once more you want to return to the original position. That’s what is stored here.

pub fn move_col(&mut self) -> Option<usize>

Extra column information for cursor movement.

pub fn set_cursor( &mut self, cursor: (usize, usize), extend_selection: bool, ) -> bool

Set the cursor position. The value is capped to the number of text lines and the line-width. Returns true, if the cursor actually changed.

pub fn cursor(&self) -> (usize, usize)

Cursor position.

pub fn anchor(&self) -> (usize, usize)

Selection anchor.

pub fn set_value<S: AsRef<str>>(&mut self, s: S)

Set the text. Resets the selection and any styles.

pub fn set_value_rope(&mut self, s: Rope)

Set the text value as a Rope. Resets all internal state.

pub fn value(&self) -> String

Text value.

pub fn value_range(&self, range: TextRange) -> Option<RopeSlice<'_>>

A range of the text as RopeSlice.

pub fn value_as_bytes(&self) -> Bytes<'_>

Value as Bytes iterator.

pub fn value_as_chars(&self) -> Chars<'_>

Value as Chars iterator.

pub fn clear_styles(&mut self)

Clear styles.

pub fn add_style(&mut self, range: TextRange, style: usize)

Add a style for the given range.

What is given here is the index into the Vec with the actual Styles. Those are set at the widget.

pub fn styles(&self) -> &[(TextRange, usize)]

Style map.

pub fn styles_at(&self, pos: (usize, usize), result: &mut Vec<usize>)

Finds all styles for the given position.

Returns the indexes into the style vec.

pub fn line(&self, n: usize) -> Option<RopeGraphemes<'_>>

Returns a line as an iterator over the graphemes for the line. This contains the \n at the end.

pub fn line_idx(&self, n: usize) -> Option<RopeGraphemesIdx<'_>>

Returns a line as an iterator over the graphemes for the line. This contains the \n at the end.

pub fn line_width(&self, n: usize) -> Option<usize>

Line width as grapheme count.

pub fn len_lines(&self) -> usize

Number of lines.

pub fn clear(&mut self) -> bool

Reset.

pub fn is_empty(&self) -> bool

Empty.

pub fn has_selection(&self) -> bool

Any text selection.

pub fn set_selection(&mut self, range: TextRange) -> bool

pub fn select_all(&mut self) -> bool

pub fn selection(&self) -> TextRange

Returns the selection as TextRange.

pub fn iter_scrolled(&self, offset: (usize, usize)) -> ScrolledIter<'_>

Iterate over the text, shifted by the offset.

pub fn next_word_boundary(&self, pos: (usize, usize)) -> Option<(usize, usize)>

Find next word.

pub fn prev_word_boundary(&self, pos: (usize, usize)) -> Option<(usize, usize)>

Find prev word.

pub fn len_chars(&self) -> usize

Len in chars

pub fn len_bytes(&self) -> usize

Len in bytes

pub fn char_pos(&self, char_pos: usize) -> Option<(usize, usize)>

Char position to grapheme position.

pub fn byte_pos(&self, byte: usize) -> Option<(usize, usize)>

Byte position to grapheme position.

pub fn byte_at(&self, pos: (usize, usize)) -> Option<(usize, usize)>

Grapheme position to byte position. This is the (start,end) position of the single grapheme after pos.

pub fn char_at(&self, pos: (usize, usize)) -> Option<usize>

Returns the first char position for the grapheme position.

pub fn insert_char(&mut self, pos: (usize, usize), c: char)

Insert a character.

pub fn insert_newline(&mut self, pos: (usize, usize))

Insert a line break.

pub fn remove(&mut self, range: TextRange)

Trait Implementations

impl Clone for InputCore

fn clone(&self) -> InputCore

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for InputCore

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for InputCore

fn default() -> InputCore

Returns the “default value” for a type.