autofocus_urlbar.uc.js

(function() {

  //if (location != "chrome://browser/content/browser.xul") return;

  const {classes: Cc, interfaces: Ci, utils: Cu} = Components;

  Cu.import("resource://gre/modules/Services.jsm");

  var AutoFocusUrlbar = {
    cs: Services.console, // nsIConsoleService
    ww: Services.ww,      // nsIWindowWatcher
    wm: Services.wm,      // nsIWindowMediator
    ps: Services.prefs,

    get doc() {
      return this.wm.getMostRecentWindow("navigator:browser").document;
    },

    get eres() {
      return this.ps.getCharPref('extensions.AutoFocusUrlbar.excludeChar');
    },

    handleEvent: function(e) {
      var document = this.doc;

      // don't focus urlbar when overflow-button is open
      var oflow = document.getElementById("nav-bar-overflow-button");
      var open = oflow.getAttribute("open");
      if (open == 'true') return;
      // don't focus urlbar when sidebar is open
      var sidebar = document.getElementById("sidebar-box");
      var checked = sidebar.getAttribute("checked");
      if (checked == 'true') return;
      // only focus urlbar on 'Lab16' (home)page
      var title = document.title;
      if (!title.includes('Lab16')) return;

      var elm = document.activeElement;
      while (1) {
        if (elm == null) return;
        //if (elm.localName == "browser" || elm.localName == "iframe" ||
        //  elm.localName == "frame") {
        //  elm = elm.contentDocument.activeElement;
        //  continue;
        //}
        break;
      }
      if (elm.ownerDocument.designMode == 'on' ||
        elm.localName == "input" || elm.localName == "select" || elm.localName == "textarea" ||
        elm.isContentEditable) return;
      var mod = e.ctrlKey || e.metaKey || e.altKey;
      if (mod) return;
      var c = String.fromCharCode(e.charCode);
      var excludePattern;
      try {
        var excludeRegExpString = this.eres;
        excludePattern = new RegExp(excludeRegExpString);
      } catch (err) {
        excludePattern = /[^a-zA-Z]/;
      }
      if (excludePattern.test(c)) return;
      var urlbar = document.getElementById("urlbar");
      if (!urlbar) return;
      e.preventDefault();
      urlbar.focus();
      try {
        urlbar.value = '';
        var evt = document.createEvent("KeyboardEvent");
        evt.initKeyEvent('keypress', false, true, null,
          false, false, false, false, 0, e.charCode);
        var input = urlbar.inputField;
        input.dispatchEvent(evt);
      } catch (err) {
        urlbar.value = c;
      }
    },

    aListener: {
      onOpenWindow: function(aWindow) {
        var win = aWindow.docShell.QueryInterface(Ci
          .nsIInterfaceRequestor).getInterface(Ci.nsIDOMWindow);
        win.addEventListener("load", function() {
          win.removeEventListener("load", arguments.callee, true);
          if (win.document.documentElement.getAttribute("windowtype") !=
            "navigator:browser") return;
          win.addEventListener("keypress", AutoFocusUrlbar, false);
        }, true);
      },
      onCloseWindow: function(aWindow) {},
      onWindowTitleChange: function(aWindow, aTitle) {},
    },

    startup: function() {
      this.wm.addListener(this.aListener);
      var cw = this.wm.getEnumerator("navigator:browser");
      while (cw.hasMoreElements()) {
        var win = cw.getNext().QueryInterface(Ci.nsIDOMWindow);
        win.addEventListener("keypress", this, false);
      }
    },
    shutdown: function() {
      this.wm.removeListener(this.aListener);
      var cw = this.wm.getEnumerator("navigator:browser");
      while (cw.hasMoreElements()) {
        var win = cw.getNext().QueryInterface(Ci.nsIDOMWindow);
        win.removeEventListener("keypress", this, false);
      }
    }
  }

  function startup(data, reason) {
    var cs = Services.console;
    AutoFocusUrlbar.startup();
  }
  startup();

  function shutdown(data, reason) {
    AutoFocusUrlbar.shutdown();
  }

  function install(data, reason) {}

  function uninstall(data, reason) {}

})();