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layout: Implement opacity per CSS-COLOR § 3.2.

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This adds the infrastructure necessary to support stacking contexts that
are not containing blocks for absolutely-positioned elements. Our
infrastructure did not support that before. This minor revamp actually
ended up simplifying the logic around display list building and
stacking-relative position computation for absolutely-positioned flows,
which was nice.
This commit is contained in:
Patrick Walton 2014-11-18 15:37:53 -08:00
parent 873ca6cadd
commit 1c1c507c03
17 changed files with 421 additions and 146 deletions
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19
components/layout/layout_task.rs
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@ -25,27 +25,27 @@ use geom::point::Point2D;
use geom::rect::Rect;
use geom::size::Size2D;
use geom::scale_factor::ScaleFactor;
use gfx::color;
use gfx::display_list::{DisplayList, OpaqueNode, StackingContext};
use gfx::render_task::{RenderInitMsg, RenderChan, RenderLayer};
use gfx::{render_task, color};
use gfx::font_cache_task::FontCacheTask;
use gfx::render_task::{mod, RenderInitMsg, RenderChan, RenderLayer};
use layout_traits;
use layout_traits::{LayoutControlMsg, LayoutTaskFactory};
use log;
use script::dom::bindings::js::JS;
use script::dom::node::{ElementNodeTypeId, LayoutDataRef, Node};
use script::dom::element::{HTMLBodyElementTypeId, HTMLHtmlElementTypeId};
use script::layout_interface::{
AddStylesheetMsg, ContentBoxResponse, ContentBoxesResponse, ContentBoxesQuery,
ContentBoxQuery, ExitNowMsg, GetRPCMsg, HitTestResponse, LayoutChan, LayoutRPC,
LoadStylesheetMsg, MouseOverResponse, Msg, NoQuery, PrepareToExitMsg, ReapLayoutDataMsg,
Reflow, ReflowForDisplay, ReflowMsg, ScriptLayoutChan, TrustedNodeAddress,
};
use script::layout_interface::{AddStylesheetMsg, ContentBoxResponse, ContentBoxesResponse};
use script::layout_interface::{ContentBoxesQuery, ContentBoxQuery, ExitNowMsg, GetRPCMsg};
use script::layout_interface::{HitTestResponse, LayoutChan, LayoutRPC, LoadStylesheetMsg};
use script::layout_interface::{MouseOverResponse, Msg, NoQuery, PrepareToExitMsg};
use script::layout_interface::{ReapLayoutDataMsg, Reflow, ReflowForDisplay, ReflowMsg};
use script::layout_interface::{ScriptLayoutChan, TrustedNodeAddress};
use script_traits::{SendEventMsg, ReflowEvent, ReflowCompleteMsg, OpaqueScriptLayoutChannel};
use script_traits::{ScriptControlChan, UntrustedNodeAddress};
use servo_msg::compositor_msg::Scrollable;
use servo_msg::constellation_msg::{ConstellationChan, PipelineId, Failure, FailureMsg};
use servo_net::image_cache_task::{ImageCacheTask, ImageResponseMsg};
use gfx::font_cache_task::{FontCacheTask};
use servo_net::local_image_cache::{ImageResponder, LocalImageCache};
use servo_net::resource_task::{ResourceTask, load_bytes_iter};
use servo_util::geometry::Au;
@ -679,6 +679,7 @@ impl LayoutTask {
let stacking_context = Arc::new(StackingContext::new(display_list,
origin,
0,
1.0,
Some(render_layer)));
rw_data.stacking_context = Some(stacking_context.clone());