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layout: Add an option to visualize parallel layout

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This commit is contained in:
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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14
components/layout/block.rs
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@ -863,6 +863,7 @@ impl BlockFlow {
// At this point, `cur_b` is at the content edge of our box. Now iterate over children.
let mut floats = self.base.floats.clone();
let mut layers_needed_for_descendants = false;
let thread_id = self.base.thread_id;
for kid in self.base.child_iter() {
if flow::base(kid).flags.contains(IS_ABSOLUTELY_POSITIONED) {
// Assume that the *hypothetical box* for an absolute flow starts immediately
@ -870,7 +871,8 @@ impl BlockFlow {
kid.as_block().hypothetical_position.b = cur_b;
kid.place_float_if_applicable(layout_context);
if !flow::base(kid).flags.is_float() {
kid.assign_block_size_for_inorder_child_if_necessary(layout_context);
kid.assign_block_size_for_inorder_child_if_necessary(layout_context,
thread_id);
}
propagate_layer_flag_from_child(&mut layers_needed_for_descendants, kid);
@ -910,7 +912,8 @@ impl BlockFlow {
// Lay the child out if this was an in-order traversal.
let need_to_process_child_floats =
kid.assign_block_size_for_inorder_child_if_necessary(layout_context);
kid.assign_block_size_for_inorder_child_if_necessary(layout_context,
thread_id);
// Mark flows for layerization if necessary to handle painting order correctly.
propagate_layer_flag_from_child(&mut layers_needed_for_descendants, kid);
@ -1047,8 +1050,9 @@ impl BlockFlow {
} else {
// We don't need to reflow, but we still need to perform in-order traversals if
// necessary.
let thread_id = self.base.thread_id;
for kid in self.base.child_iter() {
kid.assign_block_size_for_inorder_child_if_necessary(layout_context);
kid.assign_block_size_for_inorder_child_if_necessary(layout_context, thread_id);
}
}
@ -1650,7 +1654,8 @@ impl Flow for BlockFlow {
}
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 {
if self.base.flags.is_float() {
return false
@ -1662,6 +1667,7 @@ impl Flow for BlockFlow {
}
if self.base.flags.impacted_by_floats() {
self.base.thread_id = parent_thread_id;
if self.base.restyle_damage.intersects(REFLOW_OUT_OF_FLOW | REFLOW) {
self.assign_block_size(layout_context);
// Don't remove the restyle damage; `assign_block_size` decides whether that is