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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- /
/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
'use strict';
var UtilityTray = {
shown: false,
active: false,
overlay: document.getElementById('utility-tray'),
statusbar: document.getElementById('statusbar'),
screen: document.getElementById('screen'),
init: function ut_init() {
var touchEvents = ['touchstart', 'touchmove', 'touchend'];
// XXX: Always use Mouse2Touch here.
// We cannot reliably detect touch support normally
// by evaluate (document instanceof DocumentTouch) on Desktop B2G.
touchEvents.forEach(function bindEvents(name) {
// window.addEventListener(name, this);
Mouse2Touch.addEventHandler(window, name, this);
}, this);
window.addEventListener('screenchange', this);
window.addEventListener('home', this);
this.overlay.addEventListener('transitionend', this);
},
handleEvent: function ut_handleEvent(evt) {
switch (evt.type) {
case 'home':
if (this.shown) {
this.hide();
}
break;
case 'screenchange':
if (this.shown && !evt.detail.screenEnabled)
this.hide(true);
break;
case 'touchstart':
if (LockScreen.locked)
return;
if (evt.target !== this.overlay &&
evt.target !== this.statusbar)
return;
this.active = true;
// XXX: required for Mouse2Touch fake events to function
evt.target.setCapture(true);
this.onTouchStart(evt.touches[0]);
break;
case 'touchmove':
if (!this.active)
return;
this.onTouchMove(evt.touches[0]);
break;
case 'touchend':
if (!this.active)
return;
this.active = false;
// XXX: required for Mouse2Touch fake events to function
document.releaseCapture();
this.onTouchEnd(evt.changedTouches[0]);
break;
case 'transitionend':
if (!this.shown)
this.screen.classList.remove('utility-tray');
break;
}
},
onTouchStart: function ut_onTouchStart(touch) {
this.startX = touch.pageX;
this.startY = touch.pageY;
this.screen.classList.add('utility-tray');
this.onTouchMove({ pageY: touch.pageY + this.statusbar.offsetHeight });
},
onTouchMove: function ut_onTouchMove(touch) {
var screenHeight = this.overlay.getBoundingClientRect().height;
var y = touch.pageY;
if (y > this.lastY)
this.opening = true;
else if (y < this.lastY)
this.opening = false;
this.lastY = y;
var dy = -(this.startY - y);
if (this.shown)
dy += screenHeight;
dy = Math.min(screenHeight, dy);
var style = this.overlay.style;
style.MozTransition = '';
style.MozTransform = 'translateY(' + dy + 'px)';
},
onTouchEnd: function ut_onTouchEnd(touch) {
this.opening ? this.show() : this.hide();
},
hide: function ut_hide(instant) {
var alreadyHidden = !this.shown;
var style = this.overlay.style;
style.MozTransition = instant ? '' : '-moz-transform 0.2s linear';
style.MozTransform = 'translateY(0)';
this.shown = false;
if (instant)
this.screen.classList.remove('utility-tray');
if (!alreadyHidden) {
var evt = document.createEvent('CustomEvent');
evt.initCustomEvent('utilitytrayhide', true, true, null);
window.dispatchEvent(evt);
}
},
show: function ut_show(dy) {
var alreadyShown = this.shown;
var style = this.overlay.style;
style.MozTransition = '-moz-transform 0.2s linear';
style.MozTransform = 'translateY(100%)';
this.shown = true;
this.screen.classList.add('utility-tray');
if (!alreadyShown) {
var evt = document.createEvent('CustomEvent');
evt.initCustomEvent('utilitytrayshow', true, true, null);
window.dispatchEvent(evt);
}
}
};
UtilityTray.init();
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