mirror of https://github.com/espruino/BangleApps
61 lines
1.9 KiB
JavaScript
61 lines
1.9 KiB
JavaScript
(function () {
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var DEFAULTS = {
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mode: 0,
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apps: [],
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};
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var settings = require("Storage").readJSON("backswipe.json", 1) || DEFAULTS;
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// Overrride the default setUI method, so we can save the back button callback
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var setUI = Bangle.setUI;
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Bangle.setUI = function (mode, cb) {
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var options = {};
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if ("object"==typeof mode) {
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options = mode;
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}
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var currentFile = global.__FILE__ || "";
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if (global.BACK) delete global.BACK;
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if (options && options.back && enabledForApp(currentFile)) {
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global.BACK = options.back;
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}
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setUI(mode, cb);
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};
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function countHandlers(eventType) {
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if (Bangle["#on"+eventType] === undefined) {
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return 0;
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} else if (Bangle["#on"+eventType] instanceof Array) {
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return Bangle["#on"+eventType].filter(x=>x).length;
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} else if (Bangle["#on"+eventType] !== undefined) {
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return 1;
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}
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}
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function goBack(lr, _) {
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// if it is a left to right swipe
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if (lr === 1) {
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// if we're in an app that has a back button, run the callback for it
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if (global.BACK && countHandlers("swipe")<=settings.standardNumSwipeHandlers && countHandlers("drag")<=settings.standardNumDragHandlers) {
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global.BACK();
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}
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}
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}
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// Check if the back button should be enabled for the current app
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// app is the src file of the app
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function enabledForApp(app) {
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if (!settings) return true;
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if (settings.mode === 0) {
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return !(settings.apps.filter((a) => (a.src===app)||(a.files&&a.files.includes(app))).length > 0); // The `a.src===app` and `a.files&&...` checks are for backwards compatibility. Otherwise only `a.files.includes(app)` is needed.
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} else if (settings.mode === 1) {
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return settings.apps.filter((a) => (a.src===app)||(a.files&&a.files.includes(app))).length > 0;
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} else {
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return settings.mode === 2 ? true : false;
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}
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}
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// Listen to left to right swipe
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Bangle.on("swipe", goBack);
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})();
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