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Remove cached thread local context from LayoutContext

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Remove cached thread local context from LayoutContext, use LayoutContext for
assign_inline_sizes(), and simplify the parallel flow traversal code.
This commit is contained in:
Pu Xingyu 2017-02-07 10:45:13 +08:00
parent f07bfaa974
commit 336aa795b4
24 changed files with 331 additions and 428 deletions
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22
components/layout/fragment.rs
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@ -8,7 +8,7 @@
use app_units::Au;
use canvas_traits::CanvasMsg;
use context::{LayoutContext, SharedLayoutContext};
use context::{LayoutContext, with_thread_local_font_context};
use euclid::{Matrix4D, Point2D, Radians, Rect, Size2D};
use floats::ClearType;
use flow::{self, ImmutableFlowUtils};
@ -368,10 +368,10 @@ impl ImageFragmentInfo {
/// FIXME(pcwalton): The fact that image fragments store the cache in the fragment makes little
/// sense to me.
pub fn new(url: Option<ServoUrl>,
shared_layout_context: &SharedLayoutContext)
layout_context: &LayoutContext)
-> ImageFragmentInfo {
let image_or_metadata = url.and_then(|url| {
shared_layout_context.get_or_request_image_or_meta(url, UsePlaceholder::Yes)
layout_context.get_or_request_image_or_meta(url, UsePlaceholder::Yes)
});
let (image, metadata) = match image_or_metadata {
@ -786,8 +786,9 @@ impl Fragment {
SpecificFragmentInfo::UnscannedText(
box UnscannedTextFragmentInfo::new(text_overflow_string, None)));
unscanned_ellipsis_fragments.push_back(ellipsis_fragment);
let ellipsis_fragments = TextRunScanner::new().scan_for_runs(&mut layout_context.font_context(),
unscanned_ellipsis_fragments);
let ellipsis_fragments = with_thread_local_font_context(layout_context, |font_context| {
TextRunScanner::new().scan_for_runs(font_context, unscanned_ellipsis_fragments)
});
debug_assert!(ellipsis_fragments.len() == 1);
ellipsis_fragment = ellipsis_fragments.fragments.into_iter().next().unwrap();
ellipsis_fragment.flags |= IS_ELLIPSIS;
@ -2111,8 +2112,9 @@ impl Fragment {
return InlineMetrics::new(Au(0), Au(0), Au(0));
}
// See CSS 2.1 § 10.8.1.
let font_metrics = text::font_metrics_for_style(&mut layout_context.font_context(),
self.style.clone_font());
let font_metrics = with_thread_local_font_context(layout_context, |font_context| {
text::font_metrics_for_style(font_context, self.style.clone_font())
});
let line_height = text::line_height_from_style(&*self.style, &font_metrics);
InlineMetrics::from_font_metrics(&info.run.font_metrics, line_height)
}
@ -2194,9 +2196,9 @@ impl Fragment {
match style.get_box().vertical_align {
vertical_align::T::baseline => {}
vertical_align::T::middle => {
let font_metrics =
text::font_metrics_for_style(&mut layout_context.font_context(),
style.clone_font());
let font_metrics = with_thread_local_font_context(layout_context, |font_context| {
text::font_metrics_for_style(font_context, self.style.clone_font())
});
offset += (content_inline_metrics.ascent -
content_inline_metrics.space_below_baseline -
font_metrics.x_height).scale_by(0.5)