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// Copyright 2021 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 {kChunkVisualWidth, MapLogEntry} from '../../log/map.mjs';
import {CSSColor, DOM} from '../helper.mjs';
import {TimelineTrackBase} from './timeline-track-base.mjs'
DOM.defineCustomElement('view/timeline/timeline-track', 'timeline-track-map',
(templateText) =>
class TimelineTrackMap extends TimelineTrackBase {
constructor() {
super(templateText);
}
getMapStyle(map) {
return map.edge && map.edge.from ? CSSColor.onBackgroundColor :
CSSColor.onPrimaryColor;
}
markMap(map) {
const [x, y] = map.position(this.chunks);
const strokeColor = this.getMapStyle(map);
return `<circle cx=${x} cy=${y} r=${2} stroke=${
strokeColor} class=annotationPoint />`
}
markSelectedMap(map) {
const [x, y] = map.position(this.chunks);
const strokeColor = this.getMapStyle(map);
return `<circle cx=${x} cy=${y} r=${3} stroke=${
strokeColor} class=annotationPoint />`
}
_drawAnnotations(logEntry, time) {
if (!(logEntry instanceof MapLogEntry)) return;
if (!logEntry.edge) {
this.timelineAnnotationsNode.innerHTML = '';
return;
}
// Draw the trace of maps in reverse order to make sure the outgoing
// transitions of previous maps aren't drawn over.
const kOpaque = 1.0;
let stack = [];
let current = logEntry;
while (current !== undefined) {
stack.push(current);
current = current.parent;
}
// Draw outgoing refs as fuzzy background. Skip the last map entry.
let buffer = '';
let nofEdges = 0;
const kMaxOutgoingEdges = 100;
for (let i = stack.length - 2; i >= 0; i--) {
const map = stack[i].parent;
nofEdges += map.children.length;
if (nofEdges > kMaxOutgoingEdges) break;
buffer += this.drawOutgoingEdges(map, 0.4, 1);
}
// Draw main connection.
let labelOffset = 15;
let xPrev = 0;
for (let i = stack.length - 1; i >= 0; i--) {
let map = stack[i];
if (map.edge) {
const [xTo, data] = this.drawEdge(map.edge, kOpaque, labelOffset);
buffer += data;
if (xTo == xPrev) {
labelOffset += 10;
} else {
labelOffset = 15
}
xPrev = xTo;
}
buffer += this.markMap(map);
}
buffer += this.drawOutgoingEdges(logEntry, 0.9, 3);
// Mark selected map
buffer += this.markSelectedMap(logEntry);
this.timelineAnnotationsNode.innerHTML = buffer;
}
drawEdge(edge, opacity, labelOffset = 20) {
let buffer = '';
if (!edge.from || !edge.to) return [-1, buffer];
const [xFrom, yFrom] = edge.from.position(this.chunks);
const [xTo, yTo] = edge.to.position(this.chunks);
const sameChunk = xTo == xFrom;
if (sameChunk) labelOffset += 10;
const color = this._legend.colorForType(edge.type);
const offsetX = 20;
const midX = xFrom + (xTo - xFrom) / 2;
const midY = (yFrom + yTo) / 2 - 100;
if (!sameChunk) {
if (opacity == 1.0) {
buffer += `<path d="M ${xFrom} ${yFrom} Q ${midX} ${midY}, ${xTo} ${
yTo}" class=strokeBG />`
}
buffer += `<path d="M ${xFrom} ${yFrom} Q ${midX} ${midY}, ${xTo} ${
yTo}" stroke=${color} fill=none opacity=${opacity} />`
} else {
if (opacity == 1.0) {
buffer += `<line x1=${xFrom} x2=${xTo} y1=${yFrom} y2=${
yTo} class=strokeBG />`;
}
buffer += `<line x1=${xFrom} x2=${xTo} y1=${yFrom} y2=${yTo} stroke=${
color} fill=none opacity=${opacity} />`;
}
if (opacity == 1.0) {
const centerX = sameChunk ? xTo : ((xFrom / 2 + midX + xTo / 2) / 2) | 0;
const centerY = sameChunk ? yTo : ((yFrom / 2 + midY + yTo / 2) / 2) | 0;
const centerYTo = centerY - labelOffset;
buffer += `<line x1=${centerX} x2=${centerX + offsetX} y1=${centerY} y2=${
centerYTo} stroke=${color} fill=none opacity=${opacity} />`;
buffer += `<text x=${centerX + offsetX + 2} y=${
centerYTo} class=annotationLabel opacity=${opacity} >${
edge.toString()}</text>`;
}
return [xTo, buffer];
}
drawOutgoingEdges(map, opacity = 1.0, max = 10, depth = 0) {
let buffer = '';
if (!map || depth >= max) return buffer;
const limit = Math.min(map.children.length, 100)
for (let i = 0; i < limit; i++) {
const edge = map.children[i];
const [xTo, data] = this.drawEdge(edge, opacity);
buffer += data;
buffer += this.drawOutgoingEdges(edge.to, opacity * 0.5, max, depth + 1);
}
return buffer;
}
})
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