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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) {
function numberToString(x) {
return x.toFixed(3).replace(/0+$/, '').replace(/\.$/, '');
}
function clamp(min, max, x) {
return Math.min(max, Math.max(min, x));
}
function parseNumber(string) {
if (/^\s*[-+]?(\d*\.)?\d+\s*$/.test(string))
return Number(string);
}
function mergeNumbers(left, right) {
return [left, right, numberToString];
}
// FIXME: This should probably go in it's own handler.
function mergeFlex(left, right) {
if (left == 0)
return;
return clampedMergeNumbers(0, Infinity)(left, right);
}
function mergePositiveIntegers(left, right) {
return [left, right, function(x) {
return Math.round(clamp(1, Infinity, x));
}];
}
function clampedMergeNumbers(min, max) {
return function(left, right) {
return [left, right, function(x) {
return numberToString(clamp(min, max, x));
}];
};
}
function parseNumberList(string) {
var items = string.trim().split(/\s*[\s,]\s*/);
if (items.length === 0) {
return;
}
var result = [];
for (var i = 0; i < items.length; i++) {
var number = parseNumber(items[i]);
if (number === undefined) {
return;
}
result.push(number);
}
return result;
}
function mergeNumberLists(left, right) {
if (left.length != right.length) {
return;
}
return [left, right, function(numberList) {
return numberList.map(numberToString).join(' ');
}];
}
function round(left, right) {
return [left, right, Math.round];
}
scope.clamp = clamp;
scope.addPropertiesHandler(parseNumberList, mergeNumberLists, ['stroke-dasharray']);
scope.addPropertiesHandler(parseNumber, clampedMergeNumbers(0, Infinity), ['border-image-width', 'line-height']);
scope.addPropertiesHandler(parseNumber, clampedMergeNumbers(0, 1), ['opacity', 'shape-image-threshold']);
scope.addPropertiesHandler(parseNumber, mergeFlex, ['flex-grow', 'flex-shrink']);
scope.addPropertiesHandler(parseNumber, mergePositiveIntegers, ['orphans', 'widows']);
scope.addPropertiesHandler(parseNumber, round, ['z-index']);
scope.parseNumber = parseNumber;
scope.parseNumberList = parseNumberList;
scope.mergeNumbers = mergeNumbers;
scope.numberToString = numberToString;
})(webAnimations1, webAnimationsTesting);
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