mirror of https://github.com/moparisthebest/mail
55 lines
1.7 KiB
JavaScript
55 lines
1.7 KiB
JavaScript
'use strict';
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var axe = require('axe-logger'),
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DEBUG_TAG = 'backbutton handler';
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/**
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* The back button handler introduces meaningful behavior fo rthe back button:
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* if there's an open lightbox, close it;
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* if the reader is open in mobile mode, close it;
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* if the navigation is open, close it;
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* if there's nothing else open, shut down the app;
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*
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* @type {Object}
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*/
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var backBtnHandler = {
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attachHandler: function(scope) {
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this.scope = scope;
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},
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start: function() {
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document.addEventListener("backbutton", handleBackButton, false);
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},
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stop: function() {
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document.removeEventListener("backbutton", handleBackButton, false);
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}
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};
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function handleBackButton(event) {
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axe.debug(DEBUG_TAG, 'back button pressed');
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// this disarms the default behavior which we NEVER want
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event.preventDefault();
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event.stopPropagation();
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if (backBtnHandler.scope.state.lightbox) {
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// closes the lightbox (error msgs, writer, ...)
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backBtnHandler.scope.state.lightbox = undefined;
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axe.debug(DEBUG_TAG, 'lightbox closed');
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backBtnHandler.scope.$apply();
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} else if (backBtnHandler.scope.state.read && backBtnHandler.scope.state.read.open) {
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// closes the reader
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backBtnHandler.scope.state.read.toggle(false);
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axe.debug(DEBUG_TAG, 'reader closed');
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backBtnHandler.scope.$apply();
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} else if (backBtnHandler.scope.state.nav && backBtnHandler.scope.state.nav.open) {
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// closes the navigation
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backBtnHandler.scope.state.nav.toggle(false);
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axe.debug(DEBUG_TAG, 'navigation closed');
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backBtnHandler.scope.$apply();
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} else {
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// exits the app
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navigator.app.exitApp();
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}
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}
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module.exports = backBtnHandler; |