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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623
gaia/shared/js/shrinking_ui.js
Executable file
623
gaia/shared/js/shrinking_ui.js
Executable file
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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
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/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
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'use strict';
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/**
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* Shrinking UI: would make app window tilted and ready to be tapped, dragged
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* and sent out and received in. It receives four events to do the UI change:
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*
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* 'shrinking-start': tilt the window and let user can drag it
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* 'shrinking-stop' : tilt the window back immediately and let user can use it
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* 'shrinking-receiving' : after the app launched, do the receiving animation
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*
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* It would send an event out to nofify that the user has dragged the window
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* to the top of the frame, which means the content should be sent:
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* (@see '_handleSendingOut')
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*
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* 'shrinking-sent': user has dragged the window to the top of the frame
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*
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* The caller should notice that after the first time the window got tilted,
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* it must be tilted back by the 'shrinking-stop' event, or the app window
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* and the whole Gaia may be malfunctioning. Also, when the screen got black
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* out, or any other state changes occurs, the whole shrinking process would be
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* interrupted, and the 'shrinking-stop' is necessary in such situation.
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*
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*/
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/* globals dump, Promise */
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(function(exports) {
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var ShrinkingUI = function(foregroundElement, backgroundElement) {
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this.elements.foregroundElement = foregroundElement;
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this.elements.backgroundElement = backgroundElement;
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};
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ShrinkingUI.prototype = {
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DEBUG: false,
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THRESHOLD: 50,
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SUSPEND_INTERVAL: 100,
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state: {
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shrinking: false,
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ending: false,
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tilting: false,
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overThreshold: false,
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toward: 'TOP',
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touch: {
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initY: -1,
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prevY: -1
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},
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slideTransitionCb: null, // Last slide transition
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tiltTransitionCb: null // Last tilt transition
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},
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elements: {},
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configs: {
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degreeLandscape: '2.7deg',
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degreePortrait: '0.65deg',
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overDegreeLandscape: '2.9deg',
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overDegreePortrait: '0.9deg'
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},
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tip: null,
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cover: null
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};
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ShrinkingUI.prototype.debug = function su_debug(msg, optObject) {
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if (this.DEBUG) {
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var output = '[DEBUG] ShrinkingUI: ' + msg;
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if (optObject) {
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output += JSON.stringify(optObject);
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}
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dump(output);
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}
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};
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/**
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* Bind events and do some necessary initialization.
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*
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype.start = function su_start() {
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window.addEventListener('shrinking-receiving', this);
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this.startTilt();
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};
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/**
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* Unbind events and do some necessary initialization.
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*
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype.stop = function su_stop() {
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if (this.isActive()) {
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this.stopTilt();
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}
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window.removeEventListener('shrinking-receiving', this);
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};
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/**
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* The event dispatcher.
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*
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* @param {event} |evt|
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype.handleEvent = function su_handleEvent(evt) {
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switch (evt.type) {
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case 'shrinking-receiving':
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// It should be launched, then received.
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// So we'll get a new app.
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this._receivingEffects();
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break;
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case 'touchstart':
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this._handleSendingStart(evt);
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break;
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case 'touchmove':
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this._handleSendingSlide(evt);
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break;
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case 'touchend':
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this._handleSendingOut(evt);
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break;
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}
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};
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ShrinkingUI.prototype.respondToHierarchyEvent =
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function su_respondToHierarchyEvent(evt) {
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if (this['_handle_' + evt.type]) {
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return this['_handle_' + evt.type](evt);
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}
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return true;
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};
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ShrinkingUI.prototype._handle_holdhome = function su__handle_holdhome(evt) {
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return this.isActive();
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};
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ShrinkingUI.prototype._handle_home = function su__handle_home(evt) {
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return this.isActive();
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};
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/**
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* Start tilting the app window.
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*
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype.startTilt = function su_startTilt() {
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// Already shrunk.
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if (this.isActive()) {
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return;
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}
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if (!this.elements.backgroundElement || !this.elements.foregroundElement) {
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return;
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}
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this.state.shrinking = true;
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this.state.tilting = true;
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var afterTilt = () => {
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// After it tilted done, turn it to the screenshot mode.
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this.elements.foregroundElement.classList.add('hidden');
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this.state.tilting = false;
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};
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this._setTip();
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this._setState(true);
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// disable rotation to prevent display UI with wrong image
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screen.mozLockOrientation(screen.mozOrientation);
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this._shrinkingTilt(afterTilt);
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};
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/**
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* Set the tip on the window.
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*
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* @this {ShrinkingTilt}
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*/
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ShrinkingUI.prototype._setTip = function su_setTip() {
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var backgroundElement = this.elements.backgroundElement;
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if (!this.tip) {
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this.tip = this._slidingTip();
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backgroundElement.appendChild(this.tip);
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}
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this.tip.classList.remove('hide');
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};
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/**
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* Stop the shrinking effect and tilt it back.
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*
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype.stopTilt = function su_stopTilt() {
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if (!this.state.shrinking || this.state.ending) {
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return;
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}
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// When shrinking get forcibly stopped, restore the flag.
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if (this.state.tilting) {
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this.state.tilting = false;
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}
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this.state.shrinking = false;
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this.state.ending = true;
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var afterTiltBack = (() => {
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// Turn off the screenshot mode.
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this.elements.foregroundElement.classList.remove('hidden');
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this._cleanEffects().then(() => {
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this.state.ending = false;
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});
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});
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this.tip.remove();
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this.tip = null;
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this._shrinkingTiltBack(true, afterTiltBack);
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};
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/**
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* Indicate shrinking UI is active.
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*
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* @return {boolean} The frame is shrinked or not.
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* @see _setState
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype.isActive = function su_isActive() {
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if (this.state.shrinking || this.state.tilting || this.state.ending) {
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return true;
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}
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return false;
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};
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/**
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* Avoid to manipulate strings and DOM attributes everywhere.
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* Users should observe the 'data-shrinking-state' to see if now the
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* app window is tilted ('true') or not ('false').
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*
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* @param {boolean} |state| Ccurrently the UI is on or off.
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._setState = function su_shrinking(state) {
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// TODO: Call AppWindow.setState and AppWindow.getState instead of
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// setting/getting the attribute directly in shrinking UI.
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var foregroundElement = this.elements.foregroundElement;
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foregroundElement.setAttribute('data-shrinking-state',
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state.toString());
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this.debug('Setting shrink state to: ' + state);
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};
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/**
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* Update the current 'transitionend' callback for the slide animation.
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* @param {cb} transitioned callback
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._updateSlideTransition =
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function su_updateSlideTransition(cb) {
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if (this.tip && this.state.slideTransitionCb) {
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this.elements.foregroundElement.style.transitionDuration = '0s';
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this.tip.removeEventListener('transitionend',
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this.state.slideTransitionCb);
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}
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this.state.slideTransitionCb = cb;
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};
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/**
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* Update the current 'transitionend' callback for the tilt animation.
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* @param {cb} transitioned callback
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._updateTiltTransition =
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function su_updateTiltTransition(cb) {
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var foregroundElement = this.elements.foregroundElement;
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if (foregroundElement && this.state.tiltTransitionCb) {
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foregroundElement.removeEventListener('transitionend',
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this.state.tiltTransitionCb);
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}
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this.state.tiltTransitionCb = cb;
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};
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/**
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* Receiving: make the app itself fly in from the top.
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*
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._receivingEffects = function su_receivingEffects() {
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// Hide it before we move it.
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// Visibility won't work.
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var foregroundElement = this.elements.foregroundElement;
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foregroundElement.style.opacity = '0';
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var afterTop = (function() {
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// Restore the display to let it fly in.
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foregroundElement.style.opacity = '';
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foregroundElement.style.transition = 'transform 0.5s ease';
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// 2. Slide to the BOTTOM.
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// 3. Tilt back and display it as normal apps.
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this._sendingSlideTo('BOTTOM',
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(function doTiltBack() {
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this._shrinkingTiltBack(false, this._cleanEffects);
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}).bind(this)
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);
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}).bind(this);
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var afterTilt = (function() {
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// Make it fly to top immediately (can't set to zero or the
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// callback won't work).
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foregroundElement.style.transition = 'transform 0.05s ease';
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this._sendingSlideTo('TOP', afterTop);
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}).bind(this);
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// 1. Make it on top and tilted.
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this._shrinkingTilt(afterTilt);
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};
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/**
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* Slide the frame to the specific position.
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*
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* @param {number} |y| The Y coordinate the frame should slide to.
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* @param {function()} |callback| (Optional) execute after the frame moved
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* to the position.
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._sendingSlideTo =
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function su_sendingSlideTo(y, callback) {
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var foregroundElement = this.elements.foregroundElement;
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var cbDone = (function on_cbDone(evt) {
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foregroundElement.removeEventListener('transitionend', cbDone);
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// Clear animation, so the shrinkingUI will follow the touchmove event.
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this.elements.foregroundElement.style.transitionDuration = '0s';
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if ('undefined' !== typeof callback) {
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callback();
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}
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}).bind(this);
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if ('TOP' === y) {
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// We should have animation to finish the rest of transformY.
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foregroundElement.style.transitionDuration = '0.3s';
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y = foregroundElement.parentElement.clientHeight;
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} else if ('BOTTOM' === y) {
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// If no rest transformY is needed, we should trigger the callback
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// directly.
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if (this.state.touch.prevY <= 0) {
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cbDone();
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} else {
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foregroundElement.style.transitionDuration = '0.3s';
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}
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y = 0;
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} else if (y < 0) {
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y = 0;
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}
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foregroundElement.addEventListener('transitionend', cbDone);
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this._updateTiltTransition(cbDone);
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foregroundElement.style.transform =
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'rotateX(' + this._getTiltingDegree() + ') ' +
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'translateY(-' + y + 'px)';
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};
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/**
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* Create a new sliding cover and bind all necessary event handlers.
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*
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* @return {DOMElement}
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._slidingCover =
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function slidingCover() {
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var cover = document.createElement('div');
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cover.id = 'shrinking-cover';
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cover.style.width = '100%';
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cover.style.height = '100%';
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cover.style.position = 'relative';
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cover.style.zIndex = '2';
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cover.addEventListener('touchstart', this);
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cover.addEventListener('touchmove', this);
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cover.addEventListener('touchend', this);
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return cover;
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};
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/**
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* Create a tip.
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*
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* @return {DOMElement}
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._slidingTip =
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function slidingTip() {
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var tip = document.createElement('div');
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var tipArrow = document.createElement('div');
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var tipText = document.createElement('div');
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tip.id = 'shrinking-tip';
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tipArrow.id = 'shrinking-tip-arrow';
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tipText.id = 'shrinking-text';
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tipArrow.textContent = '\u00A0';
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tipText.setAttribute('data-l10n-id', 'shrinking-tip');
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tip.appendChild(tipText);
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tip.appendChild(tipArrow);
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return tip;
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};
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/**
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* Will return the disabled element to let caller manupulate it.
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*
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* @return {DOMElement}
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._disableSlidingCover =
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function su_disableSlidingCover() {
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this.cover.removeEventListener('touchstart', this);
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this.cover.removeEventListener('touchmove', this);
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this.cover.removeEventListener('touchend', this);
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};
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/**
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* Make the app frame tilted and overlay it with a cover.
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*
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* @param {function()} |cb| (Optional) if there're are any movement
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* should be performed after tilting back.
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._shrinkingTilt =
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function su_shrinkingTilt(cb) {
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var foregroundElement = this.elements.foregroundElement;
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var backgroundElement = this.elements.backgroundElement;
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// If start then do some effect would tilt the window again,
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// would generate two cover which should be unique.
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if (null === this.cover) {
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// TODO: Call AppWindow.inject(DOM) instead of changing the DOM
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// directly in Shrinking UI.
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this.cover = this._slidingCover();
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var anchor = foregroundElement.firstElementChild;
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foregroundElement.insertBefore(this.cover,
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anchor);
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}
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backgroundElement.classList.add('shrinking-wrapper');
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foregroundElement.style.transition = 'transform 0.5s ease';
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// Add a little bouncing back animation.
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// Nested callbacks: first animation is for sinking down,
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// and the second one is for bouncing back.
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var bounceBack = (function on_bounceBack(evt) {
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if (evt.target !== foregroundElement) {
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return;
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}
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foregroundElement.removeEventListener('transitionend', bounceBack);
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foregroundElement.addEventListener('transitionend', bounceBackEnd);
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this._updateTiltTransition(bounceBackEnd);
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foregroundElement.style.transition = 'transform ease';
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foregroundElement.style.transform =
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'rotateX(' + this._getTiltingDegree() + ') ';
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}).bind(this);
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var bounceBackEnd = (function on_bounceBackEnd(evt) {
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if (evt.target !== foregroundElement) {
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return;
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}
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foregroundElement.removeEventListener('transitionend',
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bounceBackEnd);
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foregroundElement.style.transition = 'transform 0.5s ease 0s';
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if (cb) {
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cb();
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}
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}).bind(this);
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foregroundElement.addEventListener('transitionend', bounceBack);
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this._updateTiltTransition(bounceBack);
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// After set up, trigger the transition.
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foregroundElement.style.transformOrigin = '50% 100% 0';
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foregroundElement.style.transform =
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'rotateX(' + this._getOverTiltingDegree() + ')';
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};
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/**
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* Restore the app frame. It depends on another stateful method
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* because we must update some states after restoring the frame.
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*
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* Note this function would not clean the effects, because the
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* window may need to be tilted again.
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*
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* @param {boolean} |instant| If true, tilt it back instantly
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* @param {function()} |cb| (Optional) Callback when the tilt was done.
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* @this {ShrinkingUI}
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*/
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ShrinkingUI.prototype._shrinkingTiltBack =
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function su_shrinkingTiltBack(instant, callback) {
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var foregroundElement = this.elements.foregroundElement;
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// Setup the rotating animation.
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if (!instant) {
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var tsEnd = (function _tsEnd(evt) {
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foregroundElement.removeEventListener('transitionend', tsEnd);
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if (callback) {
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callback();
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}
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}).bind(this);
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foregroundElement.style.transition = 'transform 0.3s ease';
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foregroundElement.addEventListener('transitionend', tsEnd);
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this._updateTiltTransition(tsEnd);
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foregroundElement.style.transform = 'rotateX(0.0deg)';
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||||
} else {
|
||||
foregroundElement.style.transition = '';
|
||||
foregroundElement.style.transform = 'rotateX(0.0deg)';
|
||||
if (callback) {
|
||||
callback();
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* User start to tap on the tilted frame.
|
||||
*
|
||||
* @param {event} |evt|
|
||||
* @this {ShrinkingUI}
|
||||
*/
|
||||
ShrinkingUI.prototype._handleSendingStart =
|
||||
function su_handleSendingStart(evt) {
|
||||
// We keep the value of pageY when touchstart, so that we can
|
||||
// use it to calculate the offset of transition of every frame.
|
||||
this.state.touch.initY = evt.touches[0].pageY;
|
||||
this.debug('_handleSendingStart(): ', this.isActive());
|
||||
// Stop the touch event to affect the inner elements.
|
||||
evt.stopImmediatePropagation();
|
||||
|
||||
// Remove the tip above the window.
|
||||
var tsEnd = (function _tsEnd() {
|
||||
this.tip.removeEventListener('transitionend', tsEnd);
|
||||
}).bind(this);
|
||||
this.tip.classList.add('hide');
|
||||
this.tip.addEventListener('transitionend', tsEnd);
|
||||
this._updateSlideTransition(tsEnd);
|
||||
|
||||
return false;
|
||||
};
|
||||
|
||||
/**
|
||||
* Sending is in progress.
|
||||
*
|
||||
* @param {event} |evt| The 'touchstart' event.
|
||||
* @this {ShrinkingUI}
|
||||
*/
|
||||
ShrinkingUI.prototype._handleSendingSlide =
|
||||
function su_handleSendingSlide(evt) {
|
||||
var pgy = evt.touches[0].pageY;
|
||||
var slideY = this.state.touch.initY - pgy;
|
||||
if ('undefined' === typeof this.state.touch.initY) {
|
||||
this.state.touch.initY = slideY;
|
||||
}
|
||||
if ('undefined' === typeof this.state.touch.prevY) {
|
||||
this.state.touch.prevY = slideY;
|
||||
}
|
||||
// User is dragging it back or not.
|
||||
this.state.toward = (this.state.touch.prevY < slideY) ? 'TOP' : 'BOTTOM';
|
||||
|
||||
this._sendingSlideTo(slideY);
|
||||
this.state.touch.prevY = slideY;
|
||||
this.state.overThreshold = (slideY > this.THRESHOLD) ? true : false;
|
||||
};
|
||||
|
||||
/**
|
||||
* Sending was finished (user released the finger).
|
||||
* Would trigger 'shrinking-sent' event if user sent it out.
|
||||
*
|
||||
* @param {event} |evt| The 'touchmove' event.
|
||||
* @this {ShrinkingUI}
|
||||
*/
|
||||
ShrinkingUI.prototype._handleSendingOut =
|
||||
function su_handleSendingOut(evt) {
|
||||
this.debug('_handleSendingOut(): ', this.isActive());
|
||||
|
||||
if (this.state.overThreshold && 'TOP' === this.state.toward) {
|
||||
this._sendingSlideTo('TOP' , (function() {
|
||||
// When it got sent, freeze it at the top.
|
||||
this._disableSlidingCover();
|
||||
window.dispatchEvent(new CustomEvent('shrinking-sent'));
|
||||
}).bind(this));
|
||||
} else {
|
||||
// Fallback to the bottom if user cancel it.
|
||||
this._sendingSlideTo('BOTTOM',
|
||||
(function resumeSending() {
|
||||
this._setTip();
|
||||
}).bind(this)
|
||||
);
|
||||
}
|
||||
};
|
||||
|
||||
/**
|
||||
* Must clear and restore the app frame after transition end
|
||||
* to make it come back with animation.
|
||||
*
|
||||
* @this {ShrinkingUI}
|
||||
*/
|
||||
ShrinkingUI.prototype._cleanEffects = function su_cleanEffects() {
|
||||
var foregroundElement = this.elements.foregroundElement;
|
||||
var backgroundElement = this.elements.backgroundElement;
|
||||
return new Promise((resolve, rejected) => {
|
||||
this.debug('_cleanEffects(): ', this.isActive());
|
||||
this._disableSlidingCover();
|
||||
foregroundElement.style.transition = '';
|
||||
foregroundElement.style.transform = '';
|
||||
foregroundElement.style.transformOrigin = '50% 50% 0';
|
||||
this._setState(false);
|
||||
|
||||
// Clear the 'transitionend' animation listener callbacks
|
||||
this._updateTiltTransition(null);
|
||||
this._updateSlideTransition(null);
|
||||
|
||||
backgroundElement.classList.remove('shrinking-wrapper');
|
||||
this.cover.remove();
|
||||
this.cover = null;
|
||||
resolve();
|
||||
});
|
||||
};
|
||||
|
||||
ShrinkingUI.prototype._getTiltingDegree = function su_getTiltingDegree() {
|
||||
return (window.OrientationManager ?
|
||||
window.OrientationManager.fetchCurrentOrientation()
|
||||
.indexOf('landscape') !== -1 :
|
||||
window.innerHeight < window.innerWidth) ?
|
||||
this.configs.degreeLandscape :
|
||||
this.configs.degreePortrait;
|
||||
};
|
||||
|
||||
ShrinkingUI.prototype._getOverTiltingDegree =
|
||||
function su_getOverTiltingDegree() {
|
||||
return (window.OrientationManager ?
|
||||
window.OrientationManager.fetchCurrentOrientation()
|
||||
.indexOf('landscape') !== -1 :
|
||||
window.innerHeight < window.innerWidth) ?
|
||||
this.configs.overDegreeLandscape :
|
||||
this.configs.overDegreePortrait;
|
||||
};
|
||||
|
||||
exports.ShrinkingUI = ShrinkingUI;
|
||||
|
||||
})(window);
|
||||
Loading…
Reference in a new issue