1// Copyright 2014 Google Inc. All rights reserved. 2// 3// Licensed under the Apache License, Version 2.0 (the "License"); 4// you may not use this file except in compliance with the License. 5// You may obtain a copy of the License at 6// 7// http://www.apache.org/licenses/LICENSE-2.0 8// 9// Unless required by applicable law or agreed to in writing, software 10// distributed under the License is distributed on an "AS IS" BASIS, 11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12// See the License for the specific language governing permissions and 13// limitations under the License. 14 15(function(scope, testing) { 16 17 function numberToString(x) { 18 return x.toFixed(3).replace(/0+$/, '').replace(/\.$/, ''); 19 } 20 21 function clamp(min, max, x) { 22 return Math.min(max, Math.max(min, x)); 23 } 24 25 function parseNumber(string) { 26 if (/^\s*[-+]?(\d*\.)?\d+\s*$/.test(string)) 27 return Number(string); 28 } 29 30 function mergeNumbers(left, right) { 31 return [left, right, numberToString]; 32 } 33 34 // FIXME: This should probably go in it's own handler. 35 function mergeFlex(left, right) { 36 if (left == 0) 37 return; 38 return clampedMergeNumbers(0, Infinity)(left, right); 39 } 40 41 function mergePositiveIntegers(left, right) { 42 return [left, right, function(x) { 43 return Math.round(clamp(1, Infinity, x)); 44 }]; 45 } 46 47 function clampedMergeNumbers(min, max) { 48 return function(left, right) { 49 return [left, right, function(x) { 50 return numberToString(clamp(min, max, x)); 51 }]; 52 }; 53 } 54 55 function parseNumberList(string) { 56 var items = string.trim().split(/\s*[\s,]\s*/); 57 if (items.length === 0) { 58 return; 59 } 60 var result = []; 61 for (var i = 0; i < items.length; i++) { 62 var number = parseNumber(items[i]); 63 if (number === undefined) { 64 return; 65 } 66 result.push(number); 67 } 68 return result; 69 } 70 71 function mergeNumberLists(left, right) { 72 if (left.length != right.length) { 73 return; 74 } 75 return [left, right, function(numberList) { 76 return numberList.map(numberToString).join(' '); 77 }]; 78 } 79 80 function round(left, right) { 81 return [left, right, Math.round]; 82 } 83 84 scope.clamp = clamp; 85 scope.addPropertiesHandler(parseNumberList, mergeNumberLists, ['stroke-dasharray']); 86 scope.addPropertiesHandler(parseNumber, clampedMergeNumbers(0, Infinity), ['border-image-width', 'line-height']); 87 scope.addPropertiesHandler(parseNumber, clampedMergeNumbers(0, 1), ['opacity', 'shape-image-threshold']); 88 scope.addPropertiesHandler(parseNumber, mergeFlex, ['flex-grow', 'flex-shrink']); 89 scope.addPropertiesHandler(parseNumber, mergePositiveIntegers, ['orphans', 'widows']); 90 scope.addPropertiesHandler(parseNumber, round, ['z-index']); 91 92 scope.parseNumber = parseNumber; 93 scope.parseNumberList = parseNumberList; 94 scope.mergeNumbers = mergeNumbers; 95 scope.numberToString = numberToString; 96 97})(webAnimations1, webAnimationsTesting); 98