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POkeydown event not working in bootstrapped Firefox addon
 

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  1. POkeydown event not working in bootstrapped Firefox addon
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    <p>I am new to extension development. I am trying to trigger an action on a <code>keydown</code> event in my bootstrapped Firefox extension, but it doesn't seem to work. Am I missing something?</p> <p>Here is my bootstrap.js code:</p> <pre><code>Cu.import("resource://gre/modules/Services.jsm"); function watchWindows(callback) { function watcher(window) { try { let {documentElement} = window.document; if (documentElement.getAttribute("windowtype") == "navigator:browser") callback(window); } catch(ex) {} } function runOnLoad(window) { window.addEventListener("load", function runOnce() { window.removeEventListener("load", runOnce, false); watcher(window); }, false); } // Add functionality to existing windows let windows = Services.wm.getEnumerator(null); while (windows.hasMoreElements()) { // Only run the watcher immediately if the window is completely loaded let window = windows.getNext(); if (window.document.readyState == "complete") watcher(window); // Wait for the window to load before continuing else runOnLoad(window); } // Watch for new browser windows opening then wait for it to load function windowWatcher(subject, topic) { if (topic == "domwindowopened") runOnLoad(subject); } Services.ww.registerNotification(windowWatcher); // Make sure to stop watching for windows if we're unloading unload(function() Services.ww.unregisterNotification(windowWatcher)); } /** * Save callbacks to run when unloading. Optionally scope the callback to a * container, e.g., window. Provide a way to run all the callbacks. * * @usage unload(): Run all callbacks and release them. * * @usage unload(callback): Add a callback to run on unload. * @param [function] callback: 0-parameter function to call on unload. * @return [function]: A 0-parameter function that undoes adding the callback. * * @usage unload(callback, container) Add a scoped callback to run on unload. * @param [function] callback: 0-parameter function to call on unload. * @param [node] container: Remove the callback when this container unloads. * @return [function]: A 0-parameter function that undoes adding the callback. */ function unload(callback, container) { // Initialize the array of unloaders on the first usage let unloaders = unload.unloaders; if (unloaders == null) unloaders = unload.unloaders = []; // Calling with no arguments runs all the unloader callbacks if (callback == null) { unloaders.slice().forEach(function(unloader) unloader()); unloaders.length = 0; return; } // The callback is bound to the lifetime of the container if we have one if (container != null) { // Remove the unloader when the container unloads container.addEventListener("unload", removeUnloader, false); // Wrap the callback to additionally remove the unload listener let origCallback = callback; callback = function() { container.removeEventListener("unload", removeUnloader, false); origCallback(); } } // Wrap the callback in a function that ignores failures function unloader() { try { callback(); } catch(ex) {} } unloaders.push(unloader); // Provide a way to remove the unloader function removeUnloader() { let index = unloaders.indexOf(unloader); if (index != -1) unloaders.splice(index, 1); } return removeUnloader; } /* library */ const Utils = (function() { const sbService = Cc['@mozilla.org/intl/stringbundle;1'] .getService(Ci.nsIStringBundleService); const windowMediator = Cc['@mozilla.org/appshell/window-mediator;1'] .getService(Ci.nsIWindowMediator); let setAttrs = function(widget, attrs) { for (let [key, value] in Iterator(attrs)) { widget.setAttribute(key, value); } }; let getMostRecentWindow = function(winType) { return windowMediator.getMostRecentWindow(winType); }; let exports = { setAttrs: setAttrs, getMostRecentWindow: getMostRecentWindow, }; return exports; })(); let ResponseManager = (function() { const obsService = Cc['@mozilla.org/observer-service;1'] .getService(Ci.nsIObserverService); const RESPONSE_TOPIC = 'http-on-examine-response'; let observers = []; let addObserver = function(observer) { try { obsService.addObserver(observer, RESPONSE_TOPIC, false); } catch(error) { trace(error); } observers.push(observers); }; let removeObserver = function(observer) { try { obsService.removeObserver(observer, RESPONSE_TOPIC, false); } catch(error) { trace(error); } }; let destory = function() { for (let observer of observers) { removeObserver(observer); } observers = null; }; let exports = { addObserver: addObserver, removeObserver: removeObserver, destory: destory, }; return exports; })(); /* main */ let ReDisposition = function() { let respObserver; respObserver = { observing: false, observe: function(subject, topic, data) { try { let channel = subject.QueryInterface(Ci.nsIHttpChannel); this.override(channel); } catch(error) { trace(error); } }, start: function() { if (!this.observing) { ResponseManager.addObserver(this); this.observing = true; } }, stop: function() { if (this.observing) { ResponseManager.removeObserver(this); this.observing = false; } }, refresh: function() { this.start(); }, re: /^\s*attachment/i, re2: /^\s*text/i, override: function(channel) { if(disablePlugin) { try { let contentHeader; contentHeader = channel.getResponseHeader('Content-Type'); if (this.re2.test(contentHeader)) return; channel.setResponseHeader('Content-Disposition', "attachment", false); return; } catch(error) { return; } } // check if have header let header; try { header = channel.getResponseHeader('Content-Disposition'); } catch(error) { return; } // override to inline if (this.re.test(header)) { channel.setResponseHeader('Content-Disposition', header.replace(this.re, "inline"), false); return; } } }; let initialize = function() { respObserver.refresh(); }; let destory = function() { respObserver.stop(); }; let exports = { initialize: initialize, destory: destory, } return exports; }; /* bootstrap entry points */ let reDisposition; var disablePlugin = false; let install = function(data, reason) {}; let uninstall = function(data, reason) {}; let startup = function(data, reason) { reDisposition = ReDisposition(); reDisposition.initialize(); function onwindow(window) { function onkeydown(e) { if (e.keyCode == 70) { disablePlugin = true; } else { disablePlugin = false; } } function onkeyup(e) { disablePlugin = false; } // Bootstrapped add-ons need to clean up after themselves! function onunload() { window.removeEventListener("keydown", onkeypress); window.removeEventListener("keyup", onkeypress); } window.addEventListener("keydown", onkeydown); window.addEventListener("keyup", onkeyup); unload(onunload, window); } watchWindows(onwindow); }; let shutdown = function(data, reason) { reDisposition.destory(); }; </code></pre>
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