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Use byte indices instead of char indices for text runs

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Replace character indices with UTF-8 byte offsets throughout the code dealing
with text shaping and breaking.  This eliminates a lot of complexity when
converting from one to the other, and interoperates better with the rest of
the Rust ecosystem.
This commit is contained in:
Matt Brubeck 2016-04-27 11:22:02 -07:00
parent dba878dfb2
commit 659305fe0a
15 changed files with 259 additions and 437 deletions
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components/layout/webrender_helpers.rs
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@ -392,7 +392,7 @@ impl WebRenderDisplayItemConverter for DisplayItem {
let mut glyphs = vec!();
for slice in item.text_run.natural_word_slices_in_visual_order(&item.range) {
for glyph in slice.glyphs.iter_glyphs_for_char_range(&slice.range) {
for glyph in slice.glyphs.iter_glyphs_for_byte_range(&slice.range) {
let glyph_advance = glyph.advance();
let glyph_offset = glyph.offset().unwrap_or(Point2D::zero());
let glyph = webrender_traits::GlyphInstance {