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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/. */
"use strict";
this.EXPORTED_SYMBOLS = [];
const Cu = Components.utils;
Cu.import("resource://gre/modules/Services.jsm");
var window = Services.wm.getMostRecentWindow("navigator:browser");
var system = window.document.getElementById("systemapp");
var OrientationChangeHandler = {
// Clockwise orientations, looping
orientations: ["portrait-primary", "landscape-secondary",
"portrait-secondary", "landscape-primary",
"portrait-primary"],
lastOrientation: "portrait-primary",
init: function() {
window.screen.addEventListener("mozorientationchange", this, true);
},
handleEvent: function(evt) {
let newOrientation = window.screen.mozOrientation;
let orientationIndex = this.orientations.indexOf(this.lastOrientation);
let nextClockwiseOrientation = this.orientations[orientationIndex + 1];
let fullSwitch = (newOrientation.split("-")[0] ==
this.lastOrientation.split("-")[0]);
this.lastOrientation = newOrientation;
let angle, xFactor, yFactor;
if (fullSwitch) {
angle = 180;
xFactor = 1;
} else {
angle = (nextClockwiseOrientation == newOrientation) ? 90 : -90;
xFactor = window.innerWidth / window.innerHeight;
}
yFactor = 1 / xFactor;
system.style.transition = "";
system.style.transform = "rotate(" + angle + "deg)" +
"scale(" + xFactor + ", " + yFactor + ")";
function trigger() {
system.style.transition = "transform .25s cubic-bezier(.15, .7, .6, .9)";
system.style.opacity = "";
system.style.transform = "";
}
// 180deg rotation, no resize
if (fullSwitch) {
window.setTimeout(trigger);
return;
}
window.addEventListener("resize", function waitForResize(e) {
window.removeEventListener("resize", waitForResize);
trigger();
});
}
};
OrientationChangeHandler.init();
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