diff options
Diffstat (limited to 'components/layout/flow.rs')
| -rw-r--r-- | components/layout/flow.rs | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/components/layout/flow.rs b/components/layout/flow.rs index f87fe4c9ef8..7d734bd1343 100644 --- a/components/layout/flow.rs +++ b/components/layout/flow.rs @@ -1115,6 +1115,28 @@ impl BaseFlow { } } + /// Update the 'flags' field when computed styles have changed. + /// + /// These flags are initially set during flow construction. They only need to be updated here + /// if they are based on properties that can change without triggering `RECONSTRUCT_FLOW`. + pub fn update_flags_if_needed(&mut self, style: &ServoComputedValues) { + // For absolutely-positioned flows, changes to top/bottom/left/right can cause these flags + // to get out of date: + if self.restyle_damage.contains(REFLOW_OUT_OF_FLOW) { + // Note: We don't need to check whether IS_ABSOLUTELY_POSITIONED has changed, because + // changes to the 'position' property trigger flow reconstruction. + if self.flags.contains(IS_ABSOLUTELY_POSITIONED) { + let logical_position = style.logical_position(); + self.flags.set(INLINE_POSITION_IS_STATIC, + logical_position.inline_start == LengthOrPercentageOrAuto::Auto && + logical_position.inline_end == LengthOrPercentageOrAuto::Auto); + self.flags.set(BLOCK_POSITION_IS_STATIC, + logical_position.block_start == LengthOrPercentageOrAuto::Auto && + logical_position.block_end == LengthOrPercentageOrAuto::Auto); + } + } + } + /// Return a new BaseFlow like this one but with the given children list pub fn clone_with_children(&self, children: FlowList) -> BaseFlow { BaseFlow { @@ -1361,6 +1383,7 @@ impl<'a> MutableFlowUtils for &'a mut Flow { /// calling them individually, since there is no reason not to perform both operations. fn repair_style_and_bubble_inline_sizes(self, style: &::StyleArc<ServoComputedValues>) { self.repair_style(style); + mut_base(self).update_flags_if_needed(style); self.bubble_inline_sizes(); } |