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 var propertyHandlers = {}; 18 19 function addPropertyHandler(parser, merger, property) { 20 propertyHandlers[property] = propertyHandlers[property] || []; 21 propertyHandlers[property].push([parser, merger]); 22 } 23 function addPropertiesHandler(parser, merger, properties) { 24 for (var i = 0; i < properties.length; i++) { 25 var property = properties[i]; 26 WEB_ANIMATIONS_TESTING && console.assert(property.toLowerCase() === property); 27 addPropertyHandler(parser, merger, property); 28 if (/-/.test(property)) { 29 // Add camel cased variant. 30 addPropertyHandler(parser, merger, property.replace(/-(.)/g, function(_, c) { 31 return c.toUpperCase(); 32 })); 33 } 34 } 35 } 36 scope.addPropertiesHandler = addPropertiesHandler; 37 38 function propertyInterpolation(property, left, right) { 39 var handlers = left == right ? [] : propertyHandlers[property]; 40 for (var i = 0; handlers && i < handlers.length; i++) { 41 var parsedLeft = handlers[i][0](left); 42 var parsedRight = handlers[i][0](right); 43 if (parsedLeft !== undefined && parsedRight !== undefined) { 44 var interpolationArgs = handlers[i][1](parsedLeft, parsedRight); 45 if (interpolationArgs) { 46 var interp = scope.Interpolation.apply(null, interpolationArgs); 47 return function(t) { 48 if (t == 0) return left; 49 if (t == 1) return right; 50 return interp(t); 51 }; 52 } 53 } 54 } 55 return scope.Interpolation(false, true, function(bool) { 56 return bool ? right : left; 57 }); 58 } 59 scope.propertyInterpolation = propertyInterpolation; 60 61 })(webAnimations1, webAnimationsTesting); 62 63
