bendns' repos / helix
Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'helix-tui/src/widgets/paragraph.rs')
-rw-r--r--helix-tui/src/widgets/paragraph.rs32
1 files changed, 32 insertions, 0 deletions
diff --git a/helix-tui/src/widgets/paragraph.rs b/helix-tui/src/widgets/paragraph.rs
index 73153a07..2b4ccfbd 100644
--- a/helix-tui/src/widgets/paragraph.rs
+++ b/helix-tui/src/widgets/paragraph.rs
@@ -127,6 +127,38 @@ impl<'a> Paragraph<'a> {
self.alignment = alignment;
self
}
+
+ pub fn required_size(&self, max_text_width: u16) -> (u16, u16) {
+ let style = self.style;
+ let mut styled = self.text.lines.iter().flat_map(|spans| {
+ spans
+ .0
+ .iter()
+ .flat_map(|span| span.styled_graphemes(style))
+ // Required given the way composers work but might be refactored out if we change
+ // composers to operate on lines instead of a stream of graphemes.
+ .chain(iter::once(StyledGrapheme {
+ symbol: "\n",
+ style: self.style,
+ }))
+ });
+ let mut line_composer: Box<dyn LineComposer> = if let Some(Wrap { trim }) = self.wrap {
+ Box::new(WordWrapper::new(&mut styled, max_text_width, trim))
+ } else {
+ let mut line_composer = Box::new(LineTruncator::new(&mut styled, max_text_width));
+ if self.alignment == Alignment::Left {
+ line_composer.set_horizontal_offset(self.scroll.1);
+ }
+ line_composer
+ };
+ let mut text_width = 0;
+ let mut text_height = 0;
+ while let Some((_, line_width)) = line_composer.next_line() {
+ text_width = line_width.max(text_width);
+ text_height += 1;
+ }
+ (text_width, text_height)
+ }
}
impl Widget for Paragraph<'_> {