v8/tools/system-analyzer/view/timeline-panel.mjs
Camillo Bruni c39e47aaa0 [tools][system-analyzer] Improve selection support
- Double click on the current timeline selection to focus and zoom in
- Make timeline-tracks focusable by setting a tabindex
- Add back arrow-key navigation for the map panel (only when focused)
- Prepare code for adding keyboard-based horizontal scrolling
- Use --code-font CSS variable

Bug: v8:10644
Change-Id: Ic473695c9fcdc795d173cd064b4660e100ae8b24
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3568475
Reviewed-by: Patrick Thier <pthier@chromium.org>
Commit-Queue: Camillo Bruni <cbruni@chromium.org>
Cr-Commit-Position: refs/heads/main@{#79786}
2022-04-05 18:42:03 +00:00

81 lines
2.5 KiB
JavaScript

// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import './timeline/timeline-track.mjs';
import './timeline/timeline-track-map.mjs';
import './timeline/timeline-track-tick.mjs';
import './timeline/timeline-track-timer.mjs';
import {SynchronizeSelectionEvent} from './events.mjs';
import {DOM, V8CustomElement} from './helper.mjs';
DOM.defineCustomElement(
'view/timeline-panel',
(templateText) => class TimelinePanel extends V8CustomElement {
constructor() {
super(templateText);
this.addEventListener('scrolltrack', e => this.handleTrackScroll(e));
this.addEventListener(
SynchronizeSelectionEvent.name,
e => this.handleSelectionSyncronization(e));
this.$('#zoomIn').onclick = () => this.nofChunks *= 1.5;
this.$('#zoomOut').onclick = () => this.nofChunks /= 1.5;
}
set nofChunks(count) {
for (const track of this.timelineTracks) {
track.nofChunks = count;
}
}
get nofChunks() {
return this.timelineTracks[0].nofChunks;
}
set currentTime(time) {
for (const track of this.timelineTracks) {
track.currentTime = time;
}
}
get currentTime() {
return this.timelineTracks[0].currentTime;
}
get timelineTracks() {
return this.$('slot').assignedNodes().filter(
node => node.nodeType === Node.ELEMENT_NODE);
}
handleTrackScroll(event) {
for (const track of this.timelineTracks) {
track.scrollLeft = event.detail;
}
}
handleSelectionSyncronization(event) {
this.timeSelection = {start: event.start, end: event.end};
}
set timeSelection(selection) {
if (selection.start > selection.end) {
throw new Error('Invalid time range');
}
const tracks = Array.from(this.timelineTracks);
if (selection.zoom) {
// To avoid inconsistencies copy the zoom/nofChunks from the first
// track
const firstTrack = tracks.pop();
firstTrack.timeSelection = selection;
selection.zoom = false;
for (const track of tracks) track.timeSelection = selection;
this.nofChunks = firstTrack.nofChunks;
} else {
for (const track of this.timelineTracks) {
track.timeSelection = selection;
}
}
}
});