Auto merge of #8898 - vwvww:compositor_msg_refactor, r=Ms2ger

Moved CompositorMsg enum into compositing crate.

moved CompositorMsg enum into compositing crate.
moved from components/msg/constellation_msg.rs
            to components/compositing/lib.rs
fixes #8832

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components/compositing/compositor.rs

@@ -2,6 +2,7 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use CompositorMsg as ConstellationMsg;
 use app_units::Au;
 use compositor_layer::{CompositorData, CompositorLayer, RcCompositorLayer, WantsScrollEventsFlag};
 use compositor_task::{CompositorEventListener, CompositorProxy};
@@ -28,7 +29,6 @@ use layers::scene::Scene;
 use layout_traits::LayoutControlChan;
 use msg::compositor_msg::{Epoch, EventResult, FrameTreeId, LayerId, LayerKind};
 use msg::compositor_msg::{LayerProperties, ScrollPolicy};
-use msg::constellation_msg::CompositorMsg as ConstellationMsg;
 use msg::constellation_msg::{AnimationState, Image, PixelFormat};
 use msg::constellation_msg::{Key, KeyModifiers, KeyState, LoadData, MouseButton};
 use msg::constellation_msg::{NavigationDirection, PipelineId, WindowSizeData};

components/compositing/compositor_task.rs

@@ -4,6 +4,7 @@
 
 //! Communication with the compositor task.
 
+use CompositorMsg as ConstellationMsg;
 use compositor;
 use euclid::point::Point2D;
 use euclid::size::Size2D;
@@ -13,7 +14,6 @@ use layers::layers::{BufferRequest, LayerBufferSet};
 use layers::platform::surface::{NativeDisplay, NativeSurface};
 use msg::compositor_msg::{Epoch, EventResult, FrameTreeId, LayerId, LayerProperties};
 use msg::compositor_msg::{PaintListener, ScriptToCompositorMsg};
-use msg::constellation_msg::CompositorMsg as ConstellationMsg;
 use msg::constellation_msg::{AnimationState, PipelineId};
 use msg::constellation_msg::{Image, Key, KeyModifiers, KeyState};
 use profile_traits::mem;

components/compositing/constellation.rs

@@ -9,6 +9,7 @@
 //! navigation context, each `Pipeline` encompassing a `ScriptTask`,
 //! `LayoutTask`, and `PaintTask`.
 
+use CompositorMsg as FromCompositorMsg;
 use canvas::canvas_paint_task::CanvasPaintTask;
 use canvas::webgl_paint_task::WebGLPaintTask;
 use canvas_traits::CanvasMsg;
@@ -26,7 +27,6 @@ use ipc_channel::router::ROUTER;
 use layout_traits::{LayoutControlChan, LayoutTaskFactory};
 use msg::compositor_msg::Epoch;
 use msg::constellation_msg::AnimationState;
-use msg::constellation_msg::CompositorMsg as FromCompositorMsg;
 use msg::constellation_msg::PaintMsg as FromPaintMsg;
 use msg::constellation_msg::WebDriverCommandMsg;
 use msg::constellation_msg::{FrameId, PipelineId};

components/compositing/headless.rs

@@ -2,12 +2,12 @@
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+use CompositorMsg as ConstellationMsg;
 use compositor_task::{CompositorEventListener, CompositorReceiver};
 use compositor_task::{InitialCompositorState, Msg};
 use euclid::scale_factor::ScaleFactor;
 use euclid::{Point2D, Size2D};
 use msg::constellation_msg::AnimationState;
-use msg::constellation_msg::CompositorMsg as ConstellationMsg;
 use msg::constellation_msg::WindowSizeData;
 use profile_traits::mem;
 use profile_traits::time;

components/compositing/lib.rs

@@ -53,6 +53,14 @@ extern crate util;
 
 pub use compositor_task::{CompositorEventListener, CompositorProxy, CompositorTask};
 pub use constellation::Constellation;
+use euclid::size::{Size2D};
+use ipc_channel::ipc::{IpcSender};
+use msg::compositor_msg::Epoch;
+use msg::constellation_msg::{FrameId, Key, KeyState, KeyModifiers, LoadData};
+use msg::constellation_msg::{NavigationDirection, PipelineId, SubpageId};
+use msg::constellation_msg::{WebDriverCommandMsg, WindowSizeData};
+use std::collections::HashMap;
+use url::Url;
 
 mod compositor;
 mod compositor_layer;
@@ -65,3 +73,30 @@ mod scrolling;
 mod surface_map;
 mod timer_scheduler;
 pub mod windowing;
+
+/// Messages from the compositor to the constellation.
+#[derive(Deserialize, Serialize)]
+pub enum CompositorMsg {
+    Exit,
+    FrameSize(PipelineId, Size2D<f32>),
+    /// Request that the constellation send the FrameId corresponding to the document
+    /// with the provided pipeline id
+    GetFrame(PipelineId, IpcSender<Option<FrameId>>),
+    /// Request that the constellation send the current pipeline id for the provided frame
+    /// id, or for the root frame if this is None, over a provided channel
+    GetPipeline(Option<FrameId>, IpcSender<Option<PipelineId>>),
+    /// Requests that the constellation inform the compositor of the title of the pipeline
+    /// immediately.
+    GetPipelineTitle(PipelineId),
+    InitLoadUrl(Url),
+    /// Query the constellation to see if the current compositor output is stable
+    IsReadyToSaveImage(HashMap<PipelineId, Epoch>),
+    KeyEvent(Key, KeyState, KeyModifiers),
+    LoadUrl(PipelineId, LoadData),
+    Navigate(Option<(PipelineId, SubpageId)>, NavigationDirection),
+    ResizedWindow(WindowSizeData),
+    /// Requests that the constellation instruct layout to begin a new tick of the animation.
+    TickAnimation(PipelineId),
+    /// Dispatch a webdriver command
+    WebDriverCommand(WebDriverCommandMsg),
+}