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Base selection on the top of the line

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This commit is contained in:
Jeremy Soller 2023-06-16 07:03:43 -06:00
parent 10bf182c5d
commit e8b10fd675
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GPG key ID: DCFCA852D3906975
2 changed files with 11 additions and 6 deletions
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10
src/buffer.rs
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@ -121,6 +121,8 @@ pub struct LayoutRun<'a> {
pub glyphs: &'a [LayoutGlyph],
/// Y offset to baseline of line
pub line_y: f32,
/// Y offset to top of line
pub line_top: f32,
/// Width of line
pub line_w: f32,
}
@ -246,15 +248,16 @@ impl<'b> Iterator for LayoutRunIter<'b> {
continue;
}
let line_y = self
let line_top = self
.total_layout
.saturating_sub(self.buffer.scroll)
.saturating_sub(1) as f32
* self.buffer.metrics.line_height;
let glyph_height = layout_line.max_ascent + layout_line.max_descent;
let centering_offset = (self.buffer.metrics.line_height - glyph_height) / 2.0;
let line_y = line_top + centering_offset + layout_line.max_ascent;
if line_y + centering_offset > self.buffer.height {
if line_top + centering_offset > self.buffer.height {
return None;
}
@ -265,7 +268,8 @@ impl<'b> Iterator for LayoutRunIter<'b> {
text: line.text(),
rtl: shape.rtl,
glyphs: &layout_line.glyphs,
line_y: line_y + centering_offset + layout_line.max_ascent,
line_y,
line_top,
line_w: layout_line.w,
}
});