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layout: Add an option to visualize parallel layout

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Patrick Walton 2015-02-20 16:46:17 -08:00
parent 172db80703
commit 40a3b41758
14 changed files with 216 additions and 88 deletions
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12
components/layout/flow.rs
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@ -202,11 +202,17 @@ pub trait Flow: fmt::Debug + Sync {
/// Assigns block-sizes in-order; or, if this is a float, places the float. The default
/// implementation simply assigns block-sizes if this flow is impacted by floats. Returns true
/// if this child was impacted by floats or false otherwise.
///
/// `parent_thread_id` is the thread ID of the parent. This is used for the layout tinting
/// debug mode; if the block size of this flow was determined by its parent, we should treat
/// it as laid out by its parent.
fn assign_block_size_for_inorder_child_if_necessary<'a>(&mut self,
layout_context: &'a LayoutContext<'a>)
layout_context: &'a LayoutContext<'a>,
parent_thread_id: u8)
-> bool {
let impacted = base(self).flags.impacted_by_floats();
if impacted {
mut_base(self).thread_id = parent_thread_id;
self.assign_block_size(layout_context);
mut_base(self).restyle_damage.remove(REFLOW_OUT_OF_FLOW | REFLOW);
}
@ -777,6 +783,9 @@ pub struct BaseFlow {
/// The writing mode for this flow.
pub writing_mode: WritingMode,
/// For debugging and profiling, the identifier of the thread that laid out this fragment.
pub thread_id: u8,
/// Various flags for flows, tightly packed to save space.
pub flags: FlowFlags,
}
@ -918,6 +927,7 @@ impl BaseFlow {
clip: ClippingRegion::max(),
flags: flags,
writing_mode: writing_mode,
thread_id: 0,
}
}