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layout: Add a REPOSITION
restyle damage type.
Separating out `REPOSITION` from `REPAINT` allows us to compute stacking-context-relative positions without rebuilding the display list. This saves a lot of time when responding to script-to-layout queries.
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6 changed files with 52 additions and 35 deletions
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@ -51,6 +51,7 @@ use model::{self, IntrinsicISizes, MarginCollapseInfo};
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use model::{CollapsibleMargins, MaybeAuto, specified, specified_or_none};
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use rustc_serialize::{Encodable, Encoder};
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use script_layout_interface::restyle_damage::{BUBBLE_ISIZES, REFLOW, REFLOW_OUT_OF_FLOW};
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use script_layout_interface::restyle_damage::REPOSITION;
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use std::cmp::{max, min};
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use std::fmt;
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use std::sync::Arc;
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@ -2114,6 +2115,8 @@ impl Flow for BlockFlow {
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flow::mut_base(kid).stacking_relative_position_of_display_port =
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stacking_relative_position_of_display_port_for_children;
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}
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self.base.restyle_damage.remove(REPOSITION)
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}
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fn mark_as_root(&mut self) {
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