mirror of
https://github.com/classilla/tenfourfox.git
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242 lines
7.2 KiB
JavaScript
242 lines
7.2 KiB
JavaScript
/* 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 file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* import-globals-from ../performance-controller.js */
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/* import-globals-from ../performance-view.js */
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/* globals window */
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"use strict";
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const WATERFALL_RESIZE_EVENTS_DRAIN = 100; // ms
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const MARKER_DETAILS_WIDTH = 200;
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/**
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* Waterfall view containing the timeline markers, controlled by DetailsView.
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*/
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var WaterfallView = Heritage.extend(DetailsSubview, {
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// Smallest unit of time between two markers. Larger by 10x^3 than Number.EPSILON.
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MARKER_EPSILON: 0.000000000001,
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observedPrefs: [
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"hidden-markers"
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],
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rerenderPrefs: [
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"hidden-markers"
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],
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rangeChangeDebounceTime: 75, // ms
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/**
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* Sets up the view with event binding.
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*/
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initialize: function () {
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DetailsSubview.initialize.call(this);
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this._cache = new WeakMap();
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this._onMarkerSelected = this._onMarkerSelected.bind(this);
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this._onResize = this._onResize.bind(this);
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this._onViewSource = this._onViewSource.bind(this);
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this._onShowAllocations = this._onShowAllocations.bind(this);
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this._hiddenMarkers = PerformanceController.getPref("hidden-markers");
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this.headerContainer = $("#waterfall-header");
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this.breakdownContainer = $("#waterfall-breakdown");
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this.detailsContainer = $("#waterfall-details");
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this.detailsSplitter = $("#waterfall-view > splitter");
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this.details = new MarkerDetails($("#waterfall-details"), $("#waterfall-view > splitter"));
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this.details.hidden = true;
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this.details.on("resize", this._onResize);
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this.details.on("view-source", this._onViewSource);
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this.details.on("show-allocations", this._onShowAllocations);
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window.addEventListener("resize", this._onResize);
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// TODO bug 1167093 save the previously set width, and ensure minimum width
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this.details.width = MARKER_DETAILS_WIDTH;
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},
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/**
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* Unbinds events.
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*/
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destroy: function () {
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DetailsSubview.destroy.call(this);
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this._cache = null;
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this.details.off("resize", this._onResize);
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this.details.off("view-source", this._onViewSource);
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this.details.off("show-allocations", this._onShowAllocations);
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window.removeEventListener("resize", this._onResize);
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},
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/**
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* Method for handling all the set up for rendering a new waterfall.
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*
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* @param object interval [optional]
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* The { startTime, endTime }, in milliseconds.
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*/
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render: function(interval={}) {
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let recording = PerformanceController.getCurrentRecording();
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let startTime = interval.startTime || 0;
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let endTime = interval.endTime || recording.getDuration();
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let markers = recording.getMarkers();
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let rootMarkerNode = this._prepareWaterfallTree(markers);
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this._populateWaterfallTree(rootMarkerNode, { startTime, endTime });
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this.emit(EVENTS.WATERFALL_RENDERED);
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},
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/**
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* Called when a marker is selected in the waterfall view,
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* updating the markers detail view.
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*/
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_onMarkerSelected: function (event, marker) {
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let recording = PerformanceController.getCurrentRecording();
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let frames = recording.getFrames();
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let allocations = recording.getConfiguration().withAllocations;
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if (event === "selected") {
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this.details.render({ marker, frames, allocations });
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this.details.hidden = false;
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this._lastSelected = marker;
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}
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if (event === "unselected") {
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this.details.empty();
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}
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},
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/**
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* Called when the marker details view is resized.
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*/
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_onResize: function () {
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setNamedTimeout("waterfall-resize", WATERFALL_RESIZE_EVENTS_DRAIN, () => {
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this._markersRoot.recalculateBounds();
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this.render(OverviewView.getTimeInterval());
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});
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},
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/**
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* Called whenever an observed pref is changed.
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*/
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_onObservedPrefChange: function(_, prefName) {
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this._hiddenMarkers = PerformanceController.getPref("hidden-markers");
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// Clear the cache as we'll need to recompute the collapsed
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// marker model
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this._cache = new WeakMap();
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},
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/**
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* Called when MarkerDetails view emits an event to view source.
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*/
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_onViewSource: function (_, data) {
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gToolbox.viewSourceInDebugger(data.url, data.line);
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},
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/**
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* Called when MarkerDetails view emits an event to snap to allocations.
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*/
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_onShowAllocations: function (_, data) {
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let { endTime } = data;
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let startTime = 0;
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let recording = PerformanceController.getCurrentRecording();
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let markers = recording.getMarkers();
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let lastGCMarkerFromPreviousCycle = null;
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let lastGCMarker = null;
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// Iterate over markers looking for the most recent GC marker
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// from the cycle before the marker's whose allocations we're interested in.
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for (let marker of markers) {
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// We found the marker whose allocations we're tracking; abort
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if (marker.start === endTime) {
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break;
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}
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if (marker.name === "GarbageCollection") {
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if (lastGCMarker && lastGCMarker.cycle !== marker.cycle) {
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lastGCMarkerFromPreviousCycle = lastGCMarker;
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}
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lastGCMarker = marker;
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}
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}
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if (lastGCMarkerFromPreviousCycle) {
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startTime = lastGCMarkerFromPreviousCycle.end;
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}
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// Adjust times so we don't include the range of these markers themselves.
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endTime -= this.MARKER_EPSILON;
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startTime += startTime !== 0 ? this.MARKER_EPSILON : 0;
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OverviewView.setTimeInterval({ startTime, endTime });
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DetailsView.selectView("memory-calltree");
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},
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/**
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* Called when the recording is stopped and prepares data to
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* populate the waterfall tree.
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*/
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_prepareWaterfallTree: function(markers) {
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let cached = this._cache.get(markers);
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if (cached) {
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return cached;
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}
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let rootMarkerNode = WaterfallUtils.createParentNode({ name: "(root)" });
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WaterfallUtils.collapseMarkersIntoNode({
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rootNode: rootMarkerNode,
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markersList: markers,
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filter: this._hiddenMarkers
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});
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this._cache.set(markers, rootMarkerNode);
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return rootMarkerNode;
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},
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/**
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* Renders the waterfall tree.
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*/
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_populateWaterfallTree: function(rootMarkerNode, interval) {
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let root = new MarkerView({
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marker: rootMarkerNode,
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// The root node is irrelevant in a waterfall tree.
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hidden: true,
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// The waterfall tree should not expand by default.
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autoExpandDepth: 0
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});
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let header = new WaterfallHeader(root);
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this._markersRoot = root;
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this._waterfallHeader = header;
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root.filter = this._hiddenMarkers;
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root.interval = interval;
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root.on("selected", this._onMarkerSelected);
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root.on("unselected", this._onMarkerSelected);
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this.breakdownContainer.innerHTML = "";
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root.attachTo(this.breakdownContainer);
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this.headerContainer.innerHTML = "";
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header.attachTo(this.headerContainer);
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// If an item was previously selected in this view, attempt to
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// re-select it by traversing the newly created tree.
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if (this._lastSelected) {
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let item = root.find(i => i.marker === this._lastSelected);
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if (item) {
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item.focus();
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}
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}
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},
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toString: () => "[object WaterfallView]"
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});
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EventEmitter.decorate(WaterfallView);
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