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4113eb6f72
We needed a separate thread in the chrome process because communication to the compositor is done through a trait object, and cross-process virtual calls are forbidden. Also, the fact that these messages are ultimately handled by the compositor is an implementation detail; conceptually, the relevant constellation is supposed to handle these messages. So instead, the script thread will now send the messages to the constellation, which will ask the compositor to handle them.
115 lines
5.1 KiB
Rust
115 lines
5.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use AnimationState;
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use DocumentState;
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use IFrameLoadInfo;
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use MouseButton;
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use MouseEventType;
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use MozBrowserEvent;
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use canvas_traits::CanvasMsg;
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use euclid::point::Point2D;
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use euclid::size::Size2D;
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use gfx_traits::LayerId;
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use ipc_channel::ipc::IpcSender;
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use msg::constellation_msg::{Key, KeyModifiers, KeyState, LoadData};
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use msg::constellation_msg::{NavigationDirection, PipelineId, SubpageId};
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use offscreen_gl_context::{GLContextAttributes, GLLimits};
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use style_traits::cursor::Cursor;
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use style_traits::viewport::ViewportConstraints;
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use url::Url;
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/// Messages from the layout to the constellation.
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#[derive(Deserialize, Serialize)]
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pub enum LayoutMsg {
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/// Indicates whether this pipeline is currently running animations.
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ChangeRunningAnimationsState(PipelineId, AnimationState),
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/// Requests that the constellation inform the compositor of the a cursor change.
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SetCursor(Cursor),
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/// Notifies the constellation that the viewport has been constrained in some manner
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ViewportConstrained(PipelineId, ViewportConstraints),
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}
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/// Whether a DOM event was prevented by web content
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#[derive(Deserialize, Serialize)]
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pub enum EventResult {
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/// Allowed by web content
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DefaultAllowed,
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/// Prevented by web content
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DefaultPrevented,
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}
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/// Messages from the script to the constellation.
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#[derive(Deserialize, Serialize)]
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pub enum ScriptMsg {
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/// Indicates whether this pipeline is currently running animations.
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ChangeRunningAnimationsState(PipelineId, AnimationState),
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/// Requests that a new 2D canvas thread be created. (This is done in the constellation because
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/// 2D canvases may use the GPU and we don't want to give untrusted content access to the GPU.)
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CreateCanvasPaintThread(Size2D<i32>, IpcSender<IpcSender<CanvasMsg>>),
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/// Requests that a new WebGL thread be created. (This is done in the constellation because
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/// WebGL uses the GPU and we don't want to give untrusted content access to the GPU.)
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CreateWebGLPaintThread(Size2D<i32>,
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GLContextAttributes,
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IpcSender<Result<(IpcSender<CanvasMsg>, GLLimits), String>>),
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/// Dispatched after the DOM load event has fired on a document
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/// Causes a `load` event to be dispatched to any enclosing frame context element
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/// for the given pipeline.
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DOMLoad(PipelineId),
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/// Notifies the constellation that this frame has received focus.
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Focus(PipelineId),
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/// Re-send a mouse button event that was sent to the parent window.
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ForwardMouseButtonEvent(PipelineId, MouseEventType, MouseButton, Point2D<f32>),
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/// Re-send a mouse move event that was sent to the parent window.
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ForwardMouseMoveEvent(PipelineId, Point2D<f32>),
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/// Requests that the constellation retrieve the current contents of the clipboard
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GetClipboardContents(IpcSender<String>),
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/// <head> tag finished parsing
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HeadParsed,
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/// All pending loads are complete.
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LoadComplete(PipelineId),
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/// A new load has been requested.
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LoadUrl(PipelineId, LoadData),
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/// Dispatch a mozbrowser event to a given iframe. Only available in experimental mode.
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MozBrowserEvent(PipelineId, SubpageId, MozBrowserEvent),
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/// HTMLIFrameElement Forward or Back navigation.
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Navigate(Option<(PipelineId, SubpageId)>, NavigationDirection),
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/// Favicon detected
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NewFavicon(Url),
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/// Status message to be displayed in the chrome, eg. a link URL on mouseover.
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NodeStatus(Option<String>),
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/// Notification that this iframe should be removed.
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RemoveIFrame(PipelineId, Option<IpcSender<()>>),
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/// A load has been requested in an IFrame.
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ScriptLoadedURLInIFrame(IFrameLoadInfo),
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/// Requests that the constellation set the contents of the clipboard
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SetClipboardContents(String),
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/// Mark a new document as active
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ActivateDocument(PipelineId),
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/// Set the document state for a pipeline (used by screenshot / reftests)
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SetDocumentState(PipelineId, DocumentState),
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/// Update the pipeline Url, which can change after redirections.
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SetFinalUrl(PipelineId, Url),
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/// Check if an alert dialog box should be presented
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Alert(PipelineId, String, IpcSender<bool>),
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/// Scroll a page in a window
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ScrollFragmentPoint(PipelineId, LayerId, Point2D<f32>, bool),
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/// Set title of current page
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/// https://html.spec.whatwg.org/multipage/#document.title
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SetTitle(PipelineId, Option<String>),
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/// Send a key event
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SendKeyEvent(Key, KeyState, KeyModifiers),
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/// Get Window Informations size and position
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GetClientWindow(IpcSender<(Size2D<u32>, Point2D<i32>)>),
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/// Move the window to a point
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MoveTo(Point2D<i32>),
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/// Resize the window to size
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ResizeTo(Size2D<u32>),
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/// Script has handled a touch event, and either prevented or allowed default actions.
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TouchEventProcessed(EventResult),
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/// Get Scroll Offset
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GetScrollOffset(PipelineId, LayerId, IpcSender<Point2D<f32>>),
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/// Requests that the compositor shut down.
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Exit,
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}
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