| // Copyright (C) 2018 The Android Open Source Project |
| // |
| // 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() { |
| 'use strict'; |
| |
| Polymer({ |
| is: 'gr-resemble-diff-mode', |
| |
| properties: { |
| baseImage: Object, |
| revisionImage: Object, |
| }, |
| |
| observers: [ |
| '_handleImageDiff(baseImage, revisionImage)', |
| ], |
| |
| _handleImageDiff(base, revision) { |
| if (base && revision) { |
| const baseEncoded = this.getDataUrl(base); |
| const revisionEncoded = this.getDataUrl(revision); |
| return this.compareImages(baseEncoded, revisionEncoded).then(src => { |
| this.$.imageDiff.setAttribute('src', src); |
| }); |
| } |
| }, |
| |
| compareImages(baseEncoded, revisionEncoded) { |
| return new Promise((resolve, reject) => |
| resemble(baseEncoded).compareTo(revisionEncoded).onComplete(data => { |
| if (data.error) { |
| reject(); |
| } else { |
| resolve(data.getImageDataUrl()); |
| } |
| }) |
| ); |
| }, |
| |
| getDataUrl(image) { |
| return 'data:' + image['type'] + ';base64,' + image['body']; |
| }, |
| }); |
| })(); |