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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
const dom = require("resource://devtools/client/shared/vendor/react-dom-factories.js");
const { colorUtils } = require("resource://devtools/shared/css/color.js");
const ComputedStylePath = require("resource://devtools/client/inspector/animation/components/keyframes-graph/ComputedStylePath.js");
const DEFAULT_COLOR = { r: 0, g: 0, b: 0, a: 1 };
/* Count for linearGradient ID */
let LINEAR_GRADIENT_ID_COUNT = 0;
class ColorPath extends ComputedStylePath {
constructor(props) {
super(props);
this.state = this.propToState(props);
}
// FIXME: https://bugzilla.mozilla.org/show_bug.cgi?id=1774507
UNSAFE_componentWillReceiveProps(nextProps) {
this.setState(this.propToState(nextProps));
}
getPropertyName() {
return "color";
}
getPropertyValue(keyframe) {
return keyframe.value;
}
propToState({ keyframes, name }) {
const maxObject = { distance: -Number.MAX_VALUE };
for (let i = 0; i < keyframes.length - 1; i++) {
const value1 = getRGBA(name, keyframes[i].value);
for (let j = i + 1; j < keyframes.length; j++) {
const value2 = getRGBA(name, keyframes[j].value);
const distance = getRGBADistance(value1, value2);
if (maxObject.distance >= distance) {
continue;
}
maxObject.distance = distance;
maxObject.value1 = value1;
maxObject.value2 = value2;
}
}
const maxDistance = maxObject.distance;
const baseValue =
maxObject.value1 < maxObject.value2 ? maxObject.value1 : maxObject.value2;
return { baseValue, maxDistance, name };
}
toSegmentValue(computedStyle) {
const { baseValue, maxDistance, name } = this.state;
const value = getRGBA(name, computedStyle);
return getRGBADistance(baseValue, value) / maxDistance;
}
/**
* Overide parent's method.
*/
renderEasingHint() {
const { easingHintStrokeWidth, graphHeight, keyframes, totalDuration } =
this.props;
const hints = [];
for (let i = 0; i < keyframes.length - 1; i++) {
const startKeyframe = keyframes[i];
const endKeyframe = keyframes[i + 1];
const startTime = startKeyframe.offset * totalDuration;
const endTime = endKeyframe.offset * totalDuration;
const g = dom.g(
{
className: "hint",
},
dom.title({}, startKeyframe.easing),
dom.rect({
x: startTime,
y: -graphHeight,
height: graphHeight,
width: endTime - startTime,
}),
dom.line({
x1: startTime,
y1: -graphHeight,
x2: endTime,
y2: -graphHeight,
style: {
"stroke-width": easingHintStrokeWidth,
},
})
);
hints.push(g);
}
return hints;
}
/**
* Overide parent's method.
*/
renderPathSegments(segments) {
for (const segment of segments) {
segment.y = 1;
}
const lastSegment = segments[segments.length - 1];
const id = `color-property-${LINEAR_GRADIENT_ID_COUNT++}`;
const path = super.renderPathSegments(segments, { fill: `url(#${id})` });
const linearGradient = dom.linearGradient(
{ id },
segments.map(segment => {
return dom.stop({
stopColor: segment.computedStyle,
offset: segment.x / lastSegment.x,
});
})
);
return [path, linearGradient];
}
render() {
return dom.g(
{
className: "color-path",
},
super.renderGraph()
);
}
}
/**
* Parse given RGBA string.
*
* @param {String} propertyName
* @param {String} colorString
* e.g. rgb(0, 0, 0) or rgba(0, 0, 0, 0.5) and so on.
* @return {Object}
* RGBA {r: r, g: g, b: b, a: a}.
*/
function getRGBA(propertyName, colorString) {
// Special handling for CSS property which can specify the not normal CSS color value.
switch (propertyName) {
case "caret-color": {
// This property can specify "auto" keyword.
if (colorString === "auto") {
return DEFAULT_COLOR;
}
break;
}
case "scrollbar-color": {
// This property can specify "auto", "dark", "light" keywords and multiple colors.
if (
["auto", "dark", "light"].includes(colorString) ||
colorString.indexOf(" ") > 0
) {
return DEFAULT_COLOR;
}
break;
}
}
const color = new colorUtils.CssColor(colorString);
return color.getRGBATuple();
}
/**
* Return the distance from give two RGBA.
*
* @param {Object} rgba1
* RGBA (format is same to getRGBA)
* @param {Object} rgba2
* RGBA (format is same to getRGBA)
* @return {Number}
* The range is 0 - 1.0.
*/
function getRGBADistance(rgba1, rgba2) {
const startA = rgba1.a;
const startR = rgba1.r * startA;
const startG = rgba1.g * startA;
const startB = rgba1.b * startA;
const endA = rgba2.a;
const endR = rgba2.r * endA;
const endG = rgba2.g * endA;
const endB = rgba2.b * endA;
const diffA = startA - endA;
const diffR = startR - endR;
const diffG = startG - endG;
const diffB = startB - endB;
return Math.sqrt(
diffA * diffA + diffR * diffR + diffG * diffG + diffB * diffB
);
}
module.exports = ColorPath;
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