debug-server-next
Version:
Dev server for hippy-core.
80 lines (79 loc) • 3.93 kB
JavaScript
// Copyright (c) 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
/* eslint-disable rulesdir/no_underscored_properties */
import * as UI from '../../legacy.js';
export class BezierUI {
width;
height;
marginTop;
radius;
linearLine;
constructor(width, height, marginTop, controlPointRadius, linearLine) {
this.width = width;
this.height = height;
this.marginTop = marginTop;
this.radius = controlPointRadius;
this.linearLine = linearLine;
}
static drawVelocityChart(bezier, path, width) {
const height = Height;
let pathBuilder = ['M', 0, height];
/** @const */ const sampleSize = 1 / 40;
let prev = bezier.evaluateAt(0);
for (let t = sampleSize; t < 1 + sampleSize; t += sampleSize) {
const current = bezier.evaluateAt(t);
let slope = (current.y - prev.y) / (current.x - prev.x);
const weightedX = prev.x * (1 - t) + current.x * t;
slope = Math.tanh(slope / 1.5); // Normalise slope
pathBuilder = pathBuilder.concat(['L', (weightedX * width).toFixed(2), (height - slope * height).toFixed(2)]);
prev = current;
}
pathBuilder = pathBuilder.concat(['L', width.toFixed(2), height, 'Z']);
path.setAttribute('d', pathBuilder.join(' '));
}
curveWidth() {
return this.width - this.radius * 2;
}
curveHeight() {
return this.height - this.radius * 2 - this.marginTop * 2;
}
_drawLine(parentElement, className, x1, y1, x2, y2) {
const line = UI.UIUtils.createSVGChild(parentElement, 'line', className);
line.setAttribute('x1', String(x1 + this.radius));
line.setAttribute('y1', String(y1 + this.radius + this.marginTop));
line.setAttribute('x2', String(x2 + this.radius));
line.setAttribute('y2', String(y2 + this.radius + this.marginTop));
}
_drawControlPoints(parentElement, startX, startY, controlX, controlY) {
this._drawLine(parentElement, 'bezier-control-line', startX, startY, controlX, controlY);
const circle = UI.UIUtils.createSVGChild(parentElement, 'circle', 'bezier-control-circle');
circle.setAttribute('cx', String(controlX + this.radius));
circle.setAttribute('cy', String(controlY + this.radius + this.marginTop));
circle.setAttribute('r', String(this.radius));
}
drawCurve(bezier, svg) {
if (!bezier) {
return;
}
const width = this.curveWidth();
const height = this.curveHeight();
svg.setAttribute('width', String(this.width));
svg.setAttribute('height', String(this.height));
svg.removeChildren();
const group = UI.UIUtils.createSVGChild(svg, 'g');
if (this.linearLine) {
this._drawLine(group, 'linear-line', 0, height, width, 0);
}
const curve = UI.UIUtils.createSVGChild(group, 'path', 'bezier-path');
const curvePoints = [
new UI.Geometry.Point(bezier.controlPoints[0].x * width + this.radius, (1 - bezier.controlPoints[0].y) * height + this.radius + this.marginTop),
new UI.Geometry.Point(bezier.controlPoints[1].x * width + this.radius, (1 - bezier.controlPoints[1].y) * height + this.radius + this.marginTop),
new UI.Geometry.Point(width + this.radius, this.marginTop + this.radius),
];
curve.setAttribute('d', 'M' + this.radius + ',' + (height + this.radius + this.marginTop) + ' C' + curvePoints.join(' '));
this._drawControlPoints(group, 0, height, bezier.controlPoints[0].x * width, (1 - bezier.controlPoints[0].y) * height);
this._drawControlPoints(group, width, 0, bezier.controlPoints[1].x * width, (1 - bezier.controlPoints[1].y) * height);
}
}
export const Height = 26;