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