b38dea0597
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
77 lines
2.1 KiB
JavaScript
Executable file
77 lines
2.1 KiB
JavaScript
Executable file
'use strict';
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/* global ImageUtils, LazyLoader */
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/*
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* WARNING: This module LazyLoads
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*
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* '/shared/js/contacts/import/utilities/config.js',
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* '/shared/js/image_utils.js'
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*
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*/
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var utils = window.utils || {};
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(function(utils) {
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var DEPENDENCIES = [
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'/shared/js/contacts/import/utilities/config.js',
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'/shared/js/image_utils.js'
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];
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var dpr = window.devicePixelRatio || 1;
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var CONFIG_FILE = '/config-images.json';
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// Default data for creating a thumbnail. This will be used if a config file
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// is not found
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var DEFAULT_CONFIG = {
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'thumbnail' : {
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'format': 'image/jpeg',
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'size': 65,
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'quality': 1.0
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}
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};
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var THUMB_CONFIG = DEFAULT_CONFIG.thumbnail;
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if (typeof utils.thumbnailImage !== 'undefined') {
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return;
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}
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// Obtains the thumbnail configuration by looking for the config file
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// If no config file is found, then default values are taken
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function getThumbsConfig() {
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return new Promise(function(resolve, reject) {
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utils.config.load(CONFIG_FILE).then(function resolved(config) {
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resolve(config);
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}, function rejected() {
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resolve(DEFAULT_CONFIG);
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});
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});
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}
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function scaleImage(blob, configData) {
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var thumbConfig = configData && configData.thumbnail || {};
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var thumbnailEdge = (thumbConfig.size || THUMB_CONFIG.size) * dpr;
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var format = thumbConfig.format || THUMB_CONFIG.format;
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var encodingQuality = thumbConfig.quality || THUMB_CONFIG.quality;
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return ImageUtils.resizeAndCropToCover(blob, thumbnailEdge,
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thumbnailEdge, format,
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encodingQuality);
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}
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// We keep the aspect ratio and make the smallest edge be
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// |thumbnailEdge| long.
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utils.thumbnailImage = function(blob, callback) {
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LazyLoader.load(DEPENDENCIES, function() {
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getThumbsConfig().then(function(config) {
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return scaleImage(blob, config);
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}).then(callback).catch(function(err) {
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console.error('Error while converting image to thumbnail:', err.name);
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callback(blob);
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});
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});
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};
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})(utils);
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