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Auto merge of #8089 - glennw:iframe-flicker, r=pcwalton

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Fix iframes flickering on mouse move.

Fixes #7867 (and probably several other iframe bugs).

When collecting layers for children of a pipeline, pass through the current
subpage pipeline recursively. This prevents descendant layers (such as scroll
layers) from being collected and re-created on the subsequent paint.

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This commit is contained in:
bors-servo 2015-10-19 17:54:12 -06:00
commit 3f4ce13419
1 changed files with 10 additions and 4 deletions
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14
components/compositing/compositor_layer.rs
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@ -449,17 +449,22 @@ impl RcCompositorLayer for Rc<Layer<CompositorData>> {
compositor: &mut IOCompositor<Window>,
pipeline_id: PipelineId,
new_layers: &[LayerProperties],
pipelines_removed: &mut Vec<PipelineId>)
pipelines_removed: &mut Vec<PipelineId>,
layer_pipeline_id: Option<PipelineId>)
where Window: WindowMethods {
// Traverse children first so that layers are removed
// bottom up - allowing each layer being removed to properly
// clean up any tiles it owns.
for kid in &*layer.children() {
let extra_data = kid.extra_data.borrow();
let layer_pipeline_id = extra_data.subpage_info.or(layer_pipeline_id);
collect_old_layers_for_pipeline(kid,
compositor,
pipeline_id,
new_layers,
pipelines_removed);
pipelines_removed,
layer_pipeline_id);
}
// Retain child layers that also exist in the new layer list.
@ -477,7 +482,7 @@ impl RcCompositorLayer for Rc<Layer<CompositorData>> {
}
}
if let Some(layer_pipeline_id) = extra_data.subpage_info {
if let Some(layer_pipeline_id) = layer_pipeline_id {
for layer_properties in new_layers.iter() {
// Keep this layer if a reference to it exists.
if let Some(ref subpage_layer_info) = layer_properties.subpage_layer_info {
@ -507,7 +512,8 @@ impl RcCompositorLayer for Rc<Layer<CompositorData>> {
compositor,
pipeline_id,
new_layers,
pipelines_removed);
pipelines_removed,
None);
}
}