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// Copyright 2014 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
(function(scope, testing) {
var canvas = document.createElementNS('http://www.w3.org/1999/xhtml', 'canvas');
canvas.width = canvas.height = 1;
var context = canvas.getContext('2d');
function parseColor(string) {
string = string.trim();
// The context ignores invalid colors
context.fillStyle = '#000';
context.fillStyle = string;
var contextSerializedFillStyle = context.fillStyle;
context.fillStyle = '#fff';
context.fillStyle = string;
if (contextSerializedFillStyle != context.fillStyle)
return;
context.fillRect(0, 0, 1, 1);
var pixelColor = context.getImageData(0, 0, 1, 1).data;
context.clearRect(0, 0, 1, 1);
var alpha = pixelColor[3] / 255;
return [pixelColor[0] * alpha, pixelColor[1] * alpha, pixelColor[2] * alpha, alpha];
}
function mergeColors(left, right) {
return [left, right, function(x) {
function clamp(v) {
return Math.max(0, Math.min(255, v));
}
if (x[3]) {
for (var i = 0; i < 3; i++)
x[i] = Math.round(clamp(x[i] / x[3]));
}
x[3] = scope.numberToString(scope.clamp(0, 1, x[3]));
return 'rgba(' + x.join(',') + ')';
}];
}
scope.addPropertiesHandler(parseColor, mergeColors,
['background-color', 'border-bottom-color', 'border-left-color', 'border-right-color',
'border-top-color', 'color', 'fill', 'flood-color', 'lighting-color',
'outline-color', 'stop-color', 'stroke', 'text-decoration-color']);
scope.consumeColor = scope.consumeParenthesised.bind(null, parseColor);
scope.mergeColors = mergeColors;
if (WEB_ANIMATIONS_TESTING) {
testing.parseColor = parseColor;
}
})(webAnimations1, webAnimationsTesting);
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