gecko-dev/toolkit/components/DefaultCLH.jsm

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

const { Services } = ChromeUtils.import("resource://gre/modules/Services.jsm");

const nsICommandLineHandler = Ci.nsICommandLineHandler;
const nsIPrefBranch = Ci.nsIPrefBranch;
const nsIWindowWatcher = Ci.nsIWindowWatcher;
const nsIProperties = Ci.nsIProperties;
const nsIFile = Ci.nsIFile;
const nsISimpleEnumerator = Ci.nsISimpleEnumerator;

/**
 * This file provides a generic default command-line handler.
 *
 * It opens the chrome window specified by the pref "toolkit.defaultChromeURI"
 * with the flags specified by the pref "toolkit.defaultChromeFeatures"
 * or "chrome,dialog=no,all" is it is not available.
 * The arguments passed to the window are the nsICommandLine instance.
 *
 * It doesn't do anything if the pref "toolkit.defaultChromeURI" is unset.
 */

function getDirectoryService() {
  return Cc["@mozilla.org/file/directory_service;1"].getService(nsIProperties);
}

function nsDefaultCLH() {}
nsDefaultCLH.prototype = {
  classID: Components.ID("{6ebc941a-f2ff-4d56-b3b6-f7d0b9d73344}"),

  /* nsISupports */

  QueryInterface: ChromeUtils.generateQI([nsICommandLineHandler]),

  /* nsICommandLineHandler */

  handle: function clh_handle(cmdLine) {
    var printDir;
    while ((printDir = cmdLine.handleFlagWithParam("print-xpcom-dir", false))) {
      var out = 'print-xpcom-dir("' + printDir + '"): ';
      try {
        out += getDirectoryService().get(printDir, nsIFile).path;
      } catch (e) {
        out += "<Not Provided>";
      }

      dump(out + "\n");
      Cu.reportError(out);
    }

    var printDirList;
    while (
      (printDirList = cmdLine.handleFlagWithParam("print-xpcom-dirlist", false))
    ) {
      out = 'print-xpcom-dirlist("' + printDirList + '"): ';
      try {
        for (let file of getDirectoryService().get(
          printDirList,
          nsISimpleEnumerator
        )) {
          out += file.path + ";";
        }
      } catch (e) {
        out += "<Not Provided>";
      }

      dump(out + "\n");
      Cu.reportError(out);
    }

    if (cmdLine.handleFlag("silent", false)) {
      cmdLine.preventDefault = true;
    }

    if (cmdLine.preventDefault) {
      return;
    }

    var prefs = Cc["@mozilla.org/preferences-service;1"].getService(
      nsIPrefBranch
    );

    try {
      var singletonWindowType = prefs.getCharPref(
        "toolkit.singletonWindowType"
      );

      var win = Services.wm.getMostRecentWindow(singletonWindowType);
      if (win) {
        win.focus();
        cmdLine.preventDefault = true;
        return;
      }
    } catch (e) {}

    // if the pref is missing, ignore the exception
    try {
      var chromeURI = prefs.getCharPref("toolkit.defaultChromeURI");

      var flags = prefs.getCharPref(
        "toolkit.defaultChromeFeatures",
        "chrome,dialog=no,all"
      );

      var wwatch = Cc["@mozilla.org/embedcomp/window-watcher;1"].getService(
        nsIWindowWatcher
      );
      wwatch.openWindow(null, chromeURI, "_blank", flags, cmdLine);
    } catch (e) {}
  },

  helpInfo: "",
};

var EXPORTED_SYMBOLS = ["nsDefaultCLH"];