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Be less stringent with invalid compositor messages

Browse source 
It is possible for messages for defunct pipelines to arrive in the
compositor. If the compositor believes that the pipelines are in the
process of shutting down, simply ignore the messages. We still panic in
the case that the pipeline is totally unknown.

Fixes #3733.
This commit is contained in:
Martin Robinson 2015-01-06 12:19:32 -08:00
parent d93b80608f
commit c5994c65ef
1 changed files with 28 additions and 7 deletions
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35
components/compositing/compositor.rs
View file

@ -523,17 +523,25 @@ impl<Window: WindowMethods> IOCompositor<Window> {
}
fn update_frame_tree(&mut self, frame_tree_diff: &FrameTreeDiff) {
let parent_layer = self.find_pipeline_root_layer(frame_tree_diff.parent_pipeline.id);
let pipeline_id = frame_tree_diff.parent_pipeline.id;
let parent_layer = match self.find_pipeline_root_layer(pipeline_id) {
Some(root_layer) => root_layer,
None => {
debug!("Ignoring FrameTreeUpdate message for pipeline ({}) shutting down.",
pipeline_id);
return;
}
};
parent_layer.add_child(
self.create_root_layer_for_pipeline_and_rect(&frame_tree_diff.pipeline,
frame_tree_diff.rect));
}
fn find_pipeline_root_layer(&self, pipeline_id: PipelineId) -> Rc<Layer<CompositorData>> {
match self.find_layer_with_pipeline_and_layer_id(pipeline_id, LayerId::null()) {
Some(ref layer) => layer.clone(),
None => panic!("Tried to create or update layer for unknown pipeline"),
fn find_pipeline_root_layer(&self, pipeline_id: PipelineId) -> Option<Rc<Layer<CompositorData>>> {
if !self.pipeline_details.contains_key(&pipeline_id) {
panic!("Tried to create or update layer for unknown pipeline")
}
self.find_layer_with_pipeline_and_layer_id(pipeline_id, LayerId::null())
}
fn update_layer_if_exists(&mut self, properties: LayerProperties) -> bool {
@ -547,9 +555,18 @@ impl<Window: WindowMethods> IOCompositor<Window> {
}
fn create_or_update_base_layer(&mut self, layer_properties: LayerProperties) {
let pipeline_id = layer_properties.pipeline_id;
let root_layer = match self.find_pipeline_root_layer(pipeline_id) {
Some(root_layer) => root_layer,
None => {
debug!("Ignoring CreateOrUpdateBaseLayer message for pipeline ({}) shutting down.",
pipeline_id);
return;
}
};
let need_new_base_layer = !self.update_layer_if_exists(layer_properties);
if need_new_base_layer {
let root_layer = self.find_pipeline_root_layer(layer_properties.pipeline_id);
root_layer.update_layer_except_bounds(layer_properties);
let root_layer_pipeline = root_layer.extra_data.borrow().pipeline.clone();
@ -581,7 +598,11 @@ impl<Window: WindowMethods> IOCompositor<Window> {
}
fn create_descendant_layer(&self, layer_properties: LayerProperties) {
let root_layer = self.find_pipeline_root_layer(layer_properties.pipeline_id);
let root_layer = match self.find_pipeline_root_layer(layer_properties.pipeline_id) {
Some(root_layer) => root_layer,
None => return, // This pipeline is in the process of shutting down.
};
let root_layer_pipeline = root_layer.extra_data.borrow().pipeline.clone();
let new_layer = CompositorData::new_layer(root_layer_pipeline,
layer_properties,