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5424479768
Simply how `ProgressiveWebMetrics` works: 1. Keep only a single struct instead of one in layout and one script that both implement the `ProgressiveWebMetrics` trait. Since layout and script are the same thread these can now just be a single `ProgressiveWebMetrics` struct stored in script. 2. Have the compositor be responsible for informing the Constellation (which informs the ScripThread) about paint metrics. This makes communication flow one way and removes one dependency between the compositor and script (of two). 3. All units tests are moved into the `metrics` crate itself since there is only one struct there now. Signed-off-by: Martin Robinson <mrobinson@igalia.com>
92 lines
4 KiB
Rust
92 lines
4 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 https://mozilla.org/MPL/2.0/. */
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use std::collections::HashMap;
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use std::fmt;
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use std::time::Duration;
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use base::Epoch;
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use base::cross_process_instant::CrossProcessInstant;
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use base::id::{PipelineId, WebViewId};
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use embedder_traits::{
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Cursor, InputEvent, MediaSessionActionType, Theme, TraversalDirection, WebDriverCommandMsg,
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};
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use ipc_channel::ipc::IpcSender;
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use script_traits::{AnimationTickType, LogEntry, WindowSizeData, WindowSizeType};
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use servo_url::ServoUrl;
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use strum_macros::IntoStaticStr;
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use webrender_traits::{CompositorHitTestResult, ScrollState};
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/// Messages to the constellation.
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#[derive(IntoStaticStr)]
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pub enum ConstellationMsg {
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/// Exit the constellation.
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Exit,
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/// Request that the constellation send the current focused top-level browsing context id,
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/// over a provided channel.
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GetFocusTopLevelBrowsingContext(IpcSender<Option<WebViewId>>),
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/// Query the constellation to see if the current compositor output is stable
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IsReadyToSaveImage(HashMap<PipelineId, Epoch>),
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/// Whether to allow script to navigate.
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AllowNavigationResponse(PipelineId, bool),
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/// Request to load a page.
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LoadUrl(WebViewId, ServoUrl),
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/// Clear the network cache.
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ClearCache,
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/// Request to traverse the joint session history of the provided browsing context.
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TraverseHistory(WebViewId, TraversalDirection),
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/// Inform the constellation of a window being resized.
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WindowSize(WebViewId, WindowSizeData, WindowSizeType),
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/// Inform the constellation of a theme change.
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ThemeChange(Theme),
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/// Requests that the constellation instruct layout to begin a new tick of the animation.
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TickAnimation(PipelineId, AnimationTickType),
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/// Dispatch a webdriver command
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WebDriverCommand(WebDriverCommandMsg),
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/// Reload a top-level browsing context.
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Reload(WebViewId),
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/// A log entry, with the top-level browsing context id and thread name
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LogEntry(Option<WebViewId>, Option<String>, LogEntry),
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/// Create a new top level browsing context.
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NewWebView(ServoUrl, WebViewId),
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/// Close a top level browsing context.
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CloseWebView(WebViewId),
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/// Panic a top level browsing context.
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SendError(Option<WebViewId>, String),
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/// Make a webview focused.
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FocusWebView(WebViewId),
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/// Make none of the webviews focused.
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BlurWebView,
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/// Forward an input event to an appropriate ScriptTask.
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ForwardInputEvent(WebViewId, InputEvent, Option<CompositorHitTestResult>),
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/// Requesting a change to the onscreen cursor.
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SetCursor(WebViewId, Cursor),
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/// Enable the sampling profiler, with a given sampling rate and max total sampling duration.
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ToggleProfiler(Duration, Duration),
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/// Request to exit from fullscreen mode
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ExitFullScreen(WebViewId),
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/// Media session action.
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MediaSessionAction(MediaSessionActionType),
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/// Set whether to use less resources, by stopping animations and running timers at a heavily limited rate.
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SetWebViewThrottled(WebViewId, bool),
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/// The Servo renderer scrolled and is updating the scroll states of the nodes in the
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/// given pipeline via the constellation.
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SetScrollStates(PipelineId, Vec<ScrollState>),
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/// Notify the constellation that a particular paint metric event has happened for the given pipeline.
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PaintMetric(PipelineId, PaintMetricEvent),
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}
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/// A description of a paint metric that is sent from the Servo renderer to the
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/// constellation.
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pub enum PaintMetricEvent {
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FirstPaint(CrossProcessInstant, bool /* first_reflow */),
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FirstContentfulPaint(CrossProcessInstant, bool /* first_reflow */),
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}
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impl fmt::Debug for ConstellationMsg {
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fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
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let variant_string: &'static str = self.into();
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write!(formatter, "ConstellationMsg::{variant_string}")
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}
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}
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