Publish Vulpes Preview 15 sources for desktop, Android and Tundra
Share Gaia assets and adapters, keep private profiles and development documents local, and update both public READMEs.
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377
gaia/apps/camera/js/views/preview-gallery.js
Executable file
377
gaia/apps/camera/js/views/preview-gallery.js
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/* jshint -W098 */
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define(function(require) {
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'use strict';
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/**
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* Dependencies
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*/
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var debug = require('debug')('view:preview-gallery');
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var addPanAndZoomHandlers = require('lib/panzoom');
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var orientation = require('lib/orientation');
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var MediaFrame = require('MediaFrame');
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var bind = require('lib/bind');
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var attach = require('attach');
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var View = require('view');
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/**
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* `<gaia-header>` used in template
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*/
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require('gaia-header');
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/**
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* Constants
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*/
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var SWIPE_DISTANCE_THRESHOLD = window.innerWidth / 3; // pixels
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var SWIPE_VELOCITY_THRESHOLD = 1.0; // pixels/ms
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var SWIPE_DURATION = 150; // How long to animate the swipe
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var FADE_IN_DURATION = 450; // How long to animate the fade in after swipe
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/**
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* Locals
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*/
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return View.extend({
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name: 'preview-gallery',
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className: 'offscreen',
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initialize: function() {
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debug('initialized');
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},
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render: function() {
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this.el.innerHTML = this.template();
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this.els.frameContainer = this.find('.js-frame-container');
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this.els.previewMenu = this.find('.js-preview-menu');
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this.els.mediaFrame = this.find('.js-media-frame');
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this.els.countText = this.find('.js-count-text');
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this.els.options = this.find('.js-options');
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this.els.header = this.find('.js-header');
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this.els.share = this.find('.js-share');
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// We're appending new elements to DOM so to make sure headers are
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// properly resized and centered, we emmit a lazyload event.
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// This will be removed when the gaia-header web component lands.
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window.dispatchEvent(new CustomEvent('lazyload', {
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detail: this.el
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}));
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// Configure the MediaFrame component
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this.configure();
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// Clean up
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delete this.template;
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debug('rendered');
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return this.bindEvents();
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},
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bindEvents: function() {
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bind(this.el, 'tap', this.onTap);
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bind(this.els.header, 'action', this.firer('click:back'));
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bind(this.els.options, 'click', this.onButtonClick);
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bind(this.els.share, 'click', this.onButtonClick);
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// Our screen reader synthesizes wheel events when the user swipes with two
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// fingers in either direction. Those events always have their deltaMode set
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// to DOM_DELTA_PAGE, and the delta value can either be -1, 0 or 1.
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bind(this.els.mediaFrame, 'wheel', this.onFrameWheel);
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return this;
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},
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configure: function() {
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this.currentIndex = this.lastIndex = 0;
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this.frame = new MediaFrame(this.els.mediaFrame, true, this.maxPreviewSize);
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this.frame.video.onloading = this.onVideoLoading;
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this.frame.video.onplaying = this.onVideoPlaying;
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this.frame.video.onpaused = this.onVideoPaused;
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addPanAndZoomHandlers(this.frame, this.swipeCallback);
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},
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template: function() {
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return '<div class="preview-menu js-preview-menu">' +
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'<gaia-header class="js-header" action="back" ignore-dir>' +
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'<h1 data-l10n-id="preview">Preview</h1>' +
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'<button class="preview-share-icon js-share"' +
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'name="share" data-icon="share" ' +
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'data-l10n-id="share-button"></button>' +
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'<button class="preview-option-icon ' +
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'js-options" name="options" data-icon="more" ' +
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'data-l10n-id="more-button"></button>' +
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'</gaia-header>' +
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'</div>' +
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'<div class="frame-container js-frame-container">' +
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'<div class="media-frame js-media-frame"></div>' +
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'</div>' +
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'<div class="count-text js-count-text"></div>';
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},
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onTap: function() {
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if (this.videoPlaying) {
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return;
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}
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var isShown = this.els.previewMenu.classList.contains('visible');
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if (isShown) {
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this.previewMenuFadeOut();
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} else {
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this.previewMenuFadeIn();
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}
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},
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previewMenuFadeIn: function() {
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this.els.previewMenu.classList.add('visible');
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},
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previewMenuFadeOut: function() {
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this.els.previewMenu.classList.remove('visible');
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},
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onFrameWheel: function(event) {
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if (event.deltaMode !== event.DOM_DELTA_PAGE || event.deltaY) {
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return;
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}
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// If the video is playing, switch to preview.
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if (this.videoPlaying) {
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this.onVideoPaused();
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}
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if (event.deltaX > 0) {
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this.emit('swipe', 'left');
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} else if (event.deltaX < 0) {
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this.emit('swipe', 'right');
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}
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},
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swipeCallback: function(swipeAmount, swipeVelocity) {
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var self = this;
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if (swipeVelocity === undefined) {
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// If this is not the end of the gesture, then just move the media
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// frame left or right by the specified amount.
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this.els.frameContainer.style.transform =
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'translate(' + swipeAmount + 'px, 0)';
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return;
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}
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// If we were passed a velocity, then this is the end of the gesture
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// and we have to figure out whether we are going to go to the
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// next item, the previous item, or remain on the current item.
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var direction, translation;
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// Should we move to the previous item?
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if (swipeAmount > 0 && swipeVelocity > 0 && // Same sign and
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this.currentIndex > 1 && // has previous item and
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(swipeAmount > SWIPE_DISTANCE_THRESHOLD || // distance big enough or
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swipeVelocity > SWIPE_VELOCITY_THRESHOLD)) // speed fast enough
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{
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direction = 'right';
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translation = '100%';
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}
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// Should we move to the next item?
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else if (swipeAmount <= 0 && swipeVelocity <= 0 &&
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this.currentIndex < this.lastIndex &&
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(swipeAmount < -SWIPE_DISTANCE_THRESHOLD ||
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swipeVelocity < -SWIPE_VELOCITY_THRESHOLD)) {
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direction = 'left';
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translation = '-100%';
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}
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// If we're not moving either left or right, just animate the
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// item to its starting point and we're done.
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if (!direction) {
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animate('transform', 'translate(0,0)', SWIPE_DURATION);
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return;
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}
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// If we get here, we are going to slide the current item off the screen
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// and display the next or previous item.
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// First, stop the video if there is one and it is playing.
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if (this.videoPlaying) {
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this.onVideoPaused();
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}
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// Now animate the item off the screen
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animate('transform', 'translate(' + translation + ', 0)',
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SWIPE_DURATION,
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function() {
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// Once we're off screen ask the controller to
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// switch to the new image.
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self.emit('swipe', direction);
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// On the next redraw, put the frame back on the screen
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// but make it opaque
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window.requestAnimationFrame(function() {
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// Next, make the frame invisible
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// and put it back on the screen
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self.els.frameContainer.style.opacity = 0;
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self.els.frameContainer.style.transform = 'translate(0,0)';
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// Then on the frame after that, animate the opacity to
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// make it visible again.
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window.requestAnimationFrame(function() {
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animate('opacity', 1, FADE_IN_DURATION);
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});
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});
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});
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// A helper function to animate the specified CSS property to the
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// specified value for the specified duration. When the animation
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// is complete, reset everything and call the done callback
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function animate(property, value, duration, done) {
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var e = self.els.frameContainer;
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e.addEventListener('transitionend', onTransitionEnd);
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e.style.transitionProperty = property;
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e.style.transitionDuration = duration + 'ms';
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e.style[property] = value;
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function onTransitionEnd() {
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e.removeEventListener('transitionend', onTransitionEnd);
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delete e.style.transitionProperty;
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delete e.style.transitionDuration;
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if (done) {
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done();
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}
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}
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}
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},
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onButtonClick: function(e, el) {
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if (this.videoPlaying) { return; }
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el = el || e.currentTarget;
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var name = el.getAttribute('name');
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if (this.optionsMenuContainer) {
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this.hideOptionsMenu();
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}
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this.emit('click:' + name, e);
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e.stopPropagation();
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},
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open: function() {
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window.addEventListener('resize', this.onResize);
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orientation.unlock();
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this.previewMenuFadeIn();
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this.el.classList.remove('offscreen');
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},
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close: function() {
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window.removeEventListener('resize', this.onResize);
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orientation.lock();
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this.previewMenuFadeOut();
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this.el.classList.add('offscreen');
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this.frame.clear();
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},
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updateCountText: function(current, total) {
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this.currentIndex = current;
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this.lastIndex = total;
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this.els.countText.textContent = current + '/' + total;
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// Ensure that the information about the number of thumbnails is provided to
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// the screen reader.
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this.els.mediaFrame.setAttribute('data-l10n-id', 'media-frame');
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this.els.mediaFrame.setAttribute('data-l10n-args', JSON.stringify(
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{ total: total, current: current }));
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},
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onResize: function() {
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// And we have to resize the frame (and its video player)
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this.frame.resize();
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if (this.frame.displayingVideo) {
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this.frame.video.setPlayerSize();
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}
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},
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showImage: function(image) {
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this.frame.displayImage(
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image.blob,
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image.width,
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image.height,
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image.preview,
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image.rotation,
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image.mirrored);
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},
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showVideo: function(video) {
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this.frame.displayVideo(
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video.blob,
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video.poster.blob,
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video.poster.width / video.poster.height,
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video.rotation);
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},
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onVideoLoading: function() {
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this.emit('loadingvideo', 'loadingVideo');
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},
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onVideoPlaying: function() {
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if (this.videoPlaying) {
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return;
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}
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this.videoPlaying = true;
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this.previewMenuFadeOut();
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this.emit('playingvideo');
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},
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onVideoPaused: function() {
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if (!this.videoPlaying) {
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return;
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}
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this.videoPlaying = false;
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this.previewMenuFadeIn();
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},
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showOptionsMenu: function() {
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this.optionsMenuContainer = document.createElement('div');
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this.optionsMenuContainer.innerHTML = this.optionTemplate();
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this.el.appendChild(this.optionsMenuContainer);
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this.el.classList.add('action-menu');
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this.menu = this.find('.js-menu');
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// We add the event listner for menu items and cancel buttons
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var cancelButton = this.find('.js-cancel');
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bind(cancelButton, 'click', this.hideOptionsMenu);
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if (this.menu) {
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attach.on(this.menu, 'click', '.js-btn', this.onButtonClick);
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}
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},
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hideOptionsMenu: function() {
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if (this.optionsMenuContainer) {
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this.el.classList.remove('action-menu');
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this.optionsMenuContainer.parentElement.removeChild(
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this.optionsMenuContainer);
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this.optionsMenuContainer = null;
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}
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},
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optionTemplate: function() {
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return '<form class="visible" data-type="action"' +
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'role="dialog" data-z-index-level="action-menu">' +
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'<header data-l10n-id="options">Options</header>' +
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'<menu class="js-menu">' +
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'<button class="js-btn" name="gallery" data-l10n-id="open-gallery">' +
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'Open Gallery' +
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'</button>' +
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'<button class="js-btn" name="delete" data-l10n-id="delete">' +
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'Delete' +
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'</button>' +
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'<button class="js-cancel" data-action="cancel" data-l10n-id="cancel">' +
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'Cancel' +
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'</button>' +
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'</menu>' +
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'</form>';
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}
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});
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});
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