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Use With trait instead of mutable variable

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This commit is contained in:
Alexandre Bury 2020-06-16 22:34:54 -07:00
parent c10b5e9a1e
commit eca68256ae
1 changed files with 13 additions and 13 deletions
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26
cursive-core/src/views/text_area.rs
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@ -63,7 +63,7 @@ new_default!(TextArea);
impl TextArea {
/// Creates a new, empty TextArea.
pub fn new() -> Self {
let mut area = TextArea {
TextArea {
content: String::new(),
rows: Vec::new(),
enabled: true,
@ -71,12 +71,9 @@ impl TextArea {
size_cache: None,
last_size: Vec2::zero(),
cursor: 0,
};
}
.with(|area| area.compute_rows(Vec2::new(1, 1)))
// Make sure we have valid rows, even for empty text.
area.compute_rows(Vec2::new(1, 1));
area
}
/// Retrieves the content of the view.
@ -84,11 +81,14 @@ impl TextArea {
&self.content
}
/// Ensures next layout call re-computes the rows.
fn invalidate(&mut self) {
self.size_cache = None;
}
/// Returns the position of the cursor in the content string.
///
/// This is a byte index.
pub fn cursor(&self) -> usize {
self.cursor
}
@ -164,26 +164,26 @@ impl TextArea {
}
/// Finds the row containing the grapheme at the given offset
fn row_at(&self, offset: usize) -> usize {
debug!("Offset: {}", offset);
fn row_at(&self, byte_offset: usize) -> usize {
debug!("Offset: {}", byte_offset);
assert!(!self.rows.is_empty());
assert!(offset >= self.rows[0].start);
assert!(byte_offset >= self.rows[0].start);
self.rows
.iter()
.enumerate()
.take_while(|&(_, row)| row.start <= offset)
.take_while(|&(_, row)| row.start <= byte_offset)
.map(|(i, _)| i)
.last()
.unwrap()
}
fn col_at(&self, offset: usize) -> usize {
let row_id = self.row_at(offset);
fn col_at(&self, byte_offset: usize) -> usize {
let row_id = self.row_at(byte_offset);
let row = self.rows[row_id];
// Number of cells to the left of the cursor
self.content[row.start..offset].width()
self.content[row.start..byte_offset].width()
}
/// Finds the row containing the cursor