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layout: Rewrite text and inline fragment handling during flow

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construction to avoid cloning and moving flows so much.

Besides amounting to a 5%-10% win on a page with a lot of text, this
simplifies and refactors the text layout code.
This commit is contained in:
Patrick Walton 2014-10-17 14:45:10 -07:00
parent d8cb901f6a
commit bb6f557276
11 changed files with 341 additions and 322 deletions
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17
components/gfx/font.rs
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@ -100,14 +100,19 @@ pub struct Font {
}
impl Font {
pub fn shape_text(&mut self, text: String, is_whitespace: bool) -> Arc<GlyphStore> {
pub fn shape_text(&mut self, text: &str, is_whitespace: bool) -> Arc<GlyphStore> {
self.make_shaper();
let shaper = &self.shaper;
self.shape_cache.find_or_create(&text, |txt| {
let mut glyphs = GlyphStore::new(text.as_slice().char_len() as int, is_whitespace);
shaper.as_ref().unwrap().shape_text(txt.as_slice(), &mut glyphs);
Arc::new(glyphs)
})
match self.shape_cache.find_equiv(&text) {
None => {}
Some(glyphs) => return (*glyphs).clone(),
}
let mut glyphs = GlyphStore::new(text.char_len() as int, is_whitespace);
shaper.as_ref().unwrap().shape_text(text, &mut glyphs);
let glyphs = Arc::new(glyphs);
self.shape_cache.insert(text.to_string(), glyphs.clone());
glyphs
}
fn make_shaper<'a>(&'a mut self) -> &'a Shaper {