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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(shared, scope, testing) {
var propertyHandlers = {};
function toCamelCase(property) {
return property.replace(/-(.)/g, function(_, c) {
return c.toUpperCase();
});
}
function addPropertyHandler(parser, merger, property) {
propertyHandlers[property] = propertyHandlers[property] || [];
propertyHandlers[property].push([parser, merger]);
}
function addPropertiesHandler(parser, merger, properties) {
for (var i = 0; i < properties.length; i++) {
var property = properties[i];
WEB_ANIMATIONS_TESTING && console.assert(property.toLowerCase() === property);
addPropertyHandler(parser, merger, toCamelCase(property));
}
}
scope.addPropertiesHandler = addPropertiesHandler;
var initialValues = {
backgroundColor: 'transparent',
backgroundPosition: '0% 0%',
borderBottomColor: 'currentColor',
borderBottomLeftRadius: '0px',
borderBottomRightRadius: '0px',
borderBottomWidth: '3px',
borderLeftColor: 'currentColor',
borderLeftWidth: '3px',
borderRightColor: 'currentColor',
borderRightWidth: '3px',
// Spec says this should be 0 but in practise it is 2px.
borderSpacing: '2px',
borderTopColor: 'currentColor',
borderTopLeftRadius: '0px',
borderTopRightRadius: '0px',
borderTopWidth: '3px',
bottom: 'auto',
clip: 'rect(0px, 0px, 0px, 0px)',
color: 'black', // Depends on user agent.
fontSize: '100%',
fontWeight: '400',
height: 'auto',
left: 'auto',
letterSpacing: 'normal',
lineHeight: '120%',
marginBottom: '0px',
marginLeft: '0px',
marginRight: '0px',
marginTop: '0px',
maxHeight: 'none',
maxWidth: 'none',
minHeight: '0px',
minWidth: '0px',
opacity: '1.0',
outlineColor: 'invert',
outlineOffset: '0px',
outlineWidth: '3px',
paddingBottom: '0px',
paddingLeft: '0px',
paddingRight: '0px',
paddingTop: '0px',
right: 'auto',
strokeDasharray: 'none',
strokeDashoffset: '0px',
textIndent: '0px',
textShadow: '0px 0px 0px transparent',
top: 'auto',
transform: '',
verticalAlign: '0px',
visibility: 'visible',
width: 'auto',
wordSpacing: 'normal',
zIndex: 'auto'
};
function propertyInterpolation(property, left, right) {
var ucProperty = property;
if (/-/.test(property) && !shared.isDeprecated('Hyphenated property names', '2016-03-22', 'Use camelCase instead.', true)) {
ucProperty = toCamelCase(property);
}
if (left == 'initial' || right == 'initial') {
if (left == 'initial')
left = initialValues[ucProperty];
if (right == 'initial')
right = initialValues[ucProperty];
}
var handlers = left == right ? [] : propertyHandlers[ucProperty];
for (var i = 0; handlers && i < handlers.length; i++) {
var parsedLeft = handlers[i][0](left);
var parsedRight = handlers[i][0](right);
if (parsedLeft !== undefined && parsedRight !== undefined) {
var interpolationArgs = handlers[i][1](parsedLeft, parsedRight);
if (interpolationArgs) {
var interp = scope.Interpolation.apply(null, interpolationArgs);
return function(t) {
if (t == 0) return left;
if (t == 1) return right;
return interp(t);
};
}
}
}
return scope.Interpolation(false, true, function(bool) {
return bool ? right : left;
});
}
scope.propertyInterpolation = propertyInterpolation;
})(webAnimationsShared, webAnimations1, webAnimationsTesting);
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