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Simplify the display list slightly

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Now that WebRender uses an Iframe display item, we do not need the Noop
item for the non-WebRender path. We can simply reuse the Iframe display
item. Also remove the layer_id member from the LayeredItem struct, as
it is unused.
This commit is contained in:
Martin Robinson 2016-03-10 14:33:22 -08:00
parent e8aeebbac5
commit 474033c39f
3 changed files with 14 additions and 29 deletions
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7
components/gfx/display_list/mod.rs
View file

@ -744,7 +744,6 @@ pub enum DisplayItem {
LineClass(Box<LineDisplayItem>),
BoxShadowClass(Box<BoxShadowDisplayItem>),
LayeredItemClass(Box<LayeredItem>),
NoopClass(Box<BaseDisplayItem>),
IframeClass(Box<IframeDisplayItem>),
}
@ -1168,9 +1167,6 @@ pub struct LayeredItem {
/// Fields common to all display items.
pub item: DisplayItem,
/// The id of the layer this item belongs to.
pub layer_id: LayerId,
/// The id of the layer this item belongs to.
pub layer_info: LayerInfo,
}
@ -1251,7 +1247,6 @@ impl DisplayItem {
DisplayItem::LayeredItemClass(ref item) => item.item.draw_into_context(paint_context),
DisplayItem::NoopClass(_) => { }
DisplayItem::IframeClass(..) => {}
}
}
@ -1280,7 +1275,6 @@ impl DisplayItem {
DisplayItem::LineClass(ref line) => &line.base,
DisplayItem::BoxShadowClass(ref box_shadow) => &box_shadow.base,
DisplayItem::LayeredItemClass(ref layered_item) => layered_item.item.base(),
DisplayItem::NoopClass(ref base_item) => base_item,
DisplayItem::IframeClass(ref iframe) => &iframe.base,
}
}
@ -1364,7 +1358,6 @@ impl fmt::Debug for DisplayItem {
DisplayItem::BoxShadowClass(_) => "BoxShadow".to_owned(),
DisplayItem::LayeredItemClass(ref layered_item) =>
format!("LayeredItem({:?})", layered_item.item),
DisplayItem::NoopClass(_) => "Noop".to_owned(),
DisplayItem::IframeClass(_) => "Iframe".to_owned(),
},
self.bounds(),

21
components/layout/display_list_builder.rs
View file

@ -1141,8 +1141,7 @@ impl FragmentDisplayListBuilding for Fragment {
}
SpecificFragmentInfo::Iframe(ref fragment_info) => {
if !stacking_relative_content_box.is_empty() {
if opts::get().use_webrender {
state.add_display_item(DisplayItem::IframeClass(box IframeDisplayItem {
let item = DisplayItem::IframeClass(box IframeDisplayItem {
base: BaseDisplayItem::new(
&stacking_relative_content_box,
DisplayItemMetadata::new(self.node,
@ -1150,19 +1149,14 @@ impl FragmentDisplayListBuilding for Fragment {
Cursor::DefaultCursor),
clip),
iframe: fragment_info.pipeline_id,
}), DisplayListSection::Content);
});
if opts::get().use_webrender {
state.add_display_item(item, DisplayListSection::Content);
} else {
let layer_id = self.layer_id();
state.add_display_item(DisplayItem::LayeredItemClass(box LayeredItem {
item: DisplayItem::NoopClass(
box BaseDisplayItem::new(
&stacking_relative_content_box,
DisplayItemMetadata::new(self.node,
&*self.style,
Cursor::DefaultCursor),
clip)),
layer_id: layer_id,
layer_info: LayerInfo::new(layer_id,
item: item,
layer_info: LayerInfo::new(self.layer_id(),
ScrollPolicy::Scrollable,
Some(fragment_info.pipeline_id),
color::transparent()),
@ -1248,7 +1242,6 @@ impl FragmentDisplayListBuilding for Fragment {
} else {
state.add_display_item(DisplayItem::LayeredItemClass(box LayeredItem {
item: display_item,
layer_id: layer_id,
layer_info: LayerInfo::new(layer_id,
ScrollPolicy::Scrollable,
None,

3
components/layout/webrender_helpers.rs
View file

@ -504,8 +504,7 @@ impl WebRenderDisplayItemConverter for DisplayItem {
DisplayItem::LineClass(..) => {
println!("TODO DisplayItem::LineClass");
}
DisplayItem::LayeredItemClass(..) |
DisplayItem::NoopClass(..) => {
DisplayItem::LayeredItemClass(..) => {
panic!("Unexpected in webrender!");
}
DisplayItem::BoxShadowClass(ref item) => {