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Remove ad-hoc recursion from add_child_if_necessary

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This commit is contained in:
Cameron Zwarich 2014-07-07 16:16:42 -07:00
parent 4c0f8c8ac0
commit c0b599f894
2 changed files with 30 additions and 38 deletions
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40
src/components/compositing/compositor.rs
View file

@ -404,13 +404,20 @@ impl IOCompositor {
new_root.extra_data.borrow_mut().unrendered_color = unrendered_color;
let parent_layer_id = new_root.extra_data.borrow().id;
assert!(CompositorData::add_child_if_necessary(new_root.clone(),
root_pipeline_id,
parent_layer_id,
match CompositorData::find_layer_with_layer_and_pipeline_id(new_root.clone(),
root_pipeline_id,
parent_layer_id) {
Some(ref mut parent_layer) => {
CompositorData::add_child_if_necessary(parent_layer.clone(),
layer_id,
Rect(Point2D(0f32, 0f32), size),
size,
Scrollable));
Scrollable);
}
None => {
fail!("Compositor: couldn't find parent layer");
}
}
// Release all tiles from the layer before dropping it.
match self.scene.root {
@ -429,19 +436,26 @@ impl IOCompositor {
rect: Rect<f32>,
scroll_policy: ScrollPolicy) {
match self.scene.root {
Some(ref root) => {
let parent_layer_id = root.extra_data.borrow().id;
let page_size = root.extra_data.borrow().page_size.unwrap();
assert!(CompositorData::add_child_if_necessary(root.clone(),
pipeline_id,
parent_layer_id,
Some(ref root_layer) => {
let parent_layer_id = root_layer.extra_data.borrow().id;
match CompositorData::find_layer_with_pipeline_and_layer_id(root_layer.clone(),
pipeline_id,
parent_layer_id) {
Some(ref mut parent_layer) => {
let page_size = root_layer.extra_data.borrow().page_size.unwrap();
CompositorData::add_child_if_necessary(parent_layer.clone(),
layer_id,
rect,
page_size,
scroll_policy))
scroll_policy);
}
None => {
fail!("Compositor: couldn't find parent layer");
}
}
}
None => fail!("Compositor: Received new layer without initialized pipeline"),
};
None => fail!("Compositor: Received new layer without initialized pipeline")
}
self.ask_for_tiles();
}

28
src/components/compositing/compositor_data.rs
View file

@ -146,38 +146,18 @@ impl CompositorData {
/// Adds a child layer to the layer with the given ID and the given pipeline, if it doesn't
/// exist yet. The child layer will have the same pipeline, tile size, memory limit, and CPU
/// painting status as its parent.
///
/// Returns:
/// * True if the layer was added;
/// * True if the layer was not added because it already existed;
/// * False if the layer could not be added because no suitable parent layer with the given
/// ID and pipeline could be found.
pub fn add_child_if_necessary(layer: Rc<Layer<CompositorData>>,
pipeline_id: PipelineId,
parent_layer_id: LayerId,
child_layer_id: LayerId,
rect: Rect<f32>,
page_size: Size2D<f32>,
scroll_policy: ScrollPolicy) -> bool {
if layer.extra_data.borrow().pipeline.id != pipeline_id ||
layer.extra_data.borrow().id != parent_layer_id {
return layer.children().iter().any(|kid| {
CompositorData::add_child_if_necessary(kid.clone(),
pipeline_id,
parent_layer_id,
child_layer_id,
rect,
page_size,
scroll_policy)
})
}
scroll_policy: ScrollPolicy) {
// See if we've already made this child layer.
let pipeline_id = layer.extra_data.borrow().pipeline.id;
if layer.children().iter().any(|kid| {
kid.extra_data.borrow().pipeline.id == pipeline_id &&
kid.extra_data.borrow().id == child_layer_id
}) {
return true
return;
}
let new_compositor_data = CompositorData::new(layer.extra_data.borrow().pipeline.clone(),
@ -197,8 +177,6 @@ impl CompositorData {
// Place the kid's layer in the container passed in.
Layer::add_child(layer.clone(), new_kid.clone());
true
}
/// Move the layer's descendants that don't want scroll events and scroll by a relative