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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) {
function consumeShadow(string) {
var shadow = {
inset: false,
lengths: [],
color: null,
};
function consumePart(string) {
var result = scope.consumeToken(/^inset/i, string);
if (result) {
shadow.inset = true;
return result;
}
var result = scope.consumeLengthOrPercent(string);
if (result) {
shadow.lengths.push(result[0]);
return result;
}
var result = scope.consumeColor(string);
if (result) {
shadow.color = result[0];
return result;
}
}
var result = scope.consumeRepeated(consumePart, /^/, string);
if (result && result[0].length) {
return [shadow, result[1]];
}
}
function parseShadowList(string) {
var result = scope.consumeRepeated(consumeShadow, /^,/, string);
if (result && result[1] == '') {
return result[0];
}
}
function mergeShadow(left, right) {
while (left.lengths.length < Math.max(left.lengths.length, right.lengths.length))
left.lengths.push({px: 0});
while (right.lengths.length < Math.max(left.lengths.length, right.lengths.length))
right.lengths.push({px: 0});
if (left.inset != right.inset || !!left.color != !!right.color) {
return;
}
var lengthReconstitution = [];
var colorReconstitution;
var matchingLeft = [[], 0];
var matchingRight = [[], 0];
for (var i = 0; i < left.lengths.length; i++) {
var mergedDimensions = scope.mergeDimensions(left.lengths[i], right.lengths[i], i == 2);
matchingLeft[0].push(mergedDimensions[0]);
matchingRight[0].push(mergedDimensions[1]);
lengthReconstitution.push(mergedDimensions[2]);
}
if (left.color && right.color) {
var mergedColor = scope.mergeColors(left.color, right.color);
matchingLeft[1] = mergedColor[0];
matchingRight[1] = mergedColor[1];
colorReconstitution = mergedColor[2];
}
return [matchingLeft, matchingRight, function(value) {
var result = left.inset ? 'inset ' : ' ';
for (var i = 0; i < lengthReconstitution.length; i++) {
result += lengthReconstitution[i](value[0][i]) + ' ';
}
if (colorReconstitution) {
result += colorReconstitution(value[1]);
}
return result;
}];
}
function mergeNestedRepeatedShadow(nestedMerge, separator, left, right) {
var leftCopy = [];
var rightCopy = [];
function defaultShadow(inset) {
return {inset: inset, color: [0, 0, 0, 0], lengths: [{px: 0}, {px: 0}, {px: 0}, {px: 0}]};
}
for (var i = 0; i < left.length || i < right.length; i++) {
var l = left[i] || defaultShadow(right[i].inset);
var r = right[i] || defaultShadow(left[i].inset);
leftCopy.push(l);
rightCopy.push(r);
}
return scope.mergeNestedRepeated(nestedMerge, separator, leftCopy, rightCopy);
}
var mergeShadowList = mergeNestedRepeatedShadow.bind(null, mergeShadow, ', ');
scope.addPropertiesHandler(parseShadowList, mergeShadowList, ['box-shadow', 'text-shadow']);
})(webAnimations1);
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