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Add/correct documentation comments in textinput

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This commit is contained in:
Matt Brubeck 2016-04-01 12:25:21 -07:00
parent d7e6f8b0f1
commit e17ed2e6b0
1 changed files with 9 additions and 2 deletions
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11
components/script/textinput.rs
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@ -165,6 +165,9 @@ impl<T: ClipboardProvider> TextInput<T> {
}) })
} }
/// Return the selection range as UTF-8 byte offsets from the start of the content.
///
/// If there is no selection, returns an empty range at the insertion point.
pub fn get_absolute_selection_range(&self) -> Range<usize> { pub fn get_absolute_selection_range(&self) -> Range<usize> {
match self.get_sorted_selection() { match self.get_sorted_selection() {
Some((begin, _end)) => Some((begin, _end)) =>
@ -302,7 +305,7 @@ impl<T: ClipboardProvider> TextInput<T> {
self.edit_point.index = min(self.current_line_length(), self.edit_point.index); self.edit_point.index = min(self.current_line_length(), self.edit_point.index);
} }
/// Adjust the editing point position by a given number of columns. If the adjustment /// Adjust the editing point position by a given number of bytes. If the adjustment
/// requested is larger than is available in the current line, the editing point is /// requested is larger than is available in the current line, the editing point is
/// adjusted vertically and the process repeats with the remaining adjustment requested. /// adjusted vertically and the process repeats with the remaining adjustment requested.
pub fn adjust_horizontal(&mut self, adjust: isize, select: Selection) { pub fn adjust_horizontal(&mut self, adjust: isize, select: Selection) {
@ -339,7 +342,7 @@ impl<T: ClipboardProvider> TextInput<T> {
self.perform_horizontal_adjustment(adjust, select); self.perform_horizontal_adjustment(adjust, select);
} }
// Return whether to cancel the caret move /// Return whether to cancel the caret move
fn adjust_selection_for_horizontal_change(&mut self, adjust: Direction, select: Selection) fn adjust_selection_for_horizontal_change(&mut self, adjust: Direction, select: Selection)
-> bool { -> bool {
if select == Selection::Selected { if select == Selection::Selected {
@ -489,6 +492,7 @@ impl<T: ClipboardProvider> TextInput<T> {
} }
} }
/// The length of the content in bytes.
pub fn len(&self) -> usize { pub fn len(&self) -> usize {
self.lines.iter().fold(0, |m, l| { self.lines.iter().fold(0, |m, l| {
m + l.len() + 1 m + l.len() + 1
@ -520,10 +524,12 @@ impl<T: ClipboardProvider> TextInput<T> {
self.selection_begin = None; self.selection_begin = None;
} }
/// Get the insertion point as a byte offset from the start of the content.
pub fn get_absolute_insertion_point(&self) -> usize { pub fn get_absolute_insertion_point(&self) -> usize {
self.get_absolute_point_for_text_point(&self.edit_point) self.get_absolute_point_for_text_point(&self.edit_point)
} }
/// Convert a TextPoint into a byte offset from the start of the content.
pub fn get_absolute_point_for_text_point(&self, text_point: &TextPoint) -> usize { pub fn get_absolute_point_for_text_point(&self, text_point: &TextPoint) -> usize {
self.lines.iter().enumerate().fold(0, |acc, (i, val)| { self.lines.iter().enumerate().fold(0, |acc, (i, val)| {
if i < text_point.line { if i < text_point.line {
@ -534,6 +540,7 @@ impl<T: ClipboardProvider> TextInput<T> {
}) + text_point.index }) + text_point.index
} }
/// Convert a byte offset from the start of the content into a TextPoint.
pub fn get_text_point_for_absolute_point(&self, abs_point: usize) -> TextPoint { pub fn get_text_point_for_absolute_point(&self, abs_point: usize) -> TextPoint {
let mut index = abs_point; let mut index = abs_point;
let mut line = 0; let mut line = 0;