pref-navigator.js - mozsearch

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/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* 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 {ShellService} = ChromeUtils.import("resource:///modules/ShellService.jsm");

// The contents of this file will be loaded into the scope of the object

// <prefpane id="navigator_pane">!

// platform integration

const PFINT_NOT_DEFAULT = 0;

const PFINT_DEFAULT     = 1;

const PFINT_PENDING     = 2;

// put "global" definitions here for easy reference

var gDefaultHomePage = "";

var gHomePagePrefPeak = 0;

var gPreferences = null;

// <preferences> access helper methods

function GetHomePagePrefCount()

  return document.getElementById("browser.startup.homepage.count").value;

function SetHomePagePrefCount(aCount)

  document.getElementById("browser.startup.homepage.count").value = aCount;

function GetHomePagePrefName(aIndex)

  var prefname = "browser.startup.homepage";

  if (aIndex > 0)

    prefname += "." + aIndex;

  return prefname;

function GetHomePagePref(aIndex)

  // return the <preference> at aIndex

  return document.getElementById(GetHomePagePrefName(aIndex));

function AddHomePagePref(aIndex)

  // create new <preference> for aIndex

  var pref = document.createElement("preference");

  var prefname = GetHomePagePrefName(aIndex);

  pref.setAttribute("id",   prefname);

  pref.setAttribute("name", prefname);

  pref.setAttribute("type", "wstring");

  gPreferences.appendChild(pref);

  return pref;

// homepage group textbox helper methods

function GetHomePageGroup()

  return document.getElementById("browserStartupHomepage").value;

function SetHomePageValue(aValue)

  document.getElementById("browserStartupHomepage").value = aValue;

// helper methods for reading current page URIs

function GetMostRecentBrowser()

  var browserWindow = Services.wm.getMostRecentWindow("navigator:browser");

  return browserWindow && browserWindow.getBrowser();

function GetCurrentPage()

  var tabbrowser = GetMostRecentBrowser();

  return tabbrowser && tabbrowser.currentURI.spec || ""; // ensure string

function GetCurrentGroup()

  var uris = [];

  var tabbrowser = GetMostRecentBrowser();

  if (tabbrowser)

    var browsers = tabbrowser.browsers;

    var browsersLen = browsers.length;

    for (var i = 0; i < browsersLen; ++i)

      uris[i] = browsers[i].currentURI.spec;

  return uris.join("\n");

// synchronize button states with current input

function CanonifyURLList(aList)

  return (aList + "\n").replace(/\n+/g, "\n");

function UpdateHomePageButtons()

  var homePageGroup = CanonifyURLList(GetHomePageGroup());

  var currentPage   = CanonifyURLList(GetCurrentPage());

  var currentGroup  = CanonifyURLList(GetCurrentGroup());

  // disable "current page" button if current page is already the homepage

  var currentPageButton = document.getElementById("browserUseCurrent");

  currentPageButton.disabled = (homePageGroup == currentPage) ||

                               (currentPage == "\n");

  // disable "current group" button if current group already set or no group

  var currentGroupButton = document.getElementById("browserUseCurrentGroup");

  currentGroupButton.disabled = (homePageGroup == currentGroup) ||

                                (currentGroup == currentPage);

  // disable "restore" button if homepage hasn't changed

  var restoreButton = document.getElementById("browserUseDefault");

  restoreButton.disabled = (homePageGroup == gDefaultHomePage);

function UpdateHomePagePrefs()

  // update the list of <preference>s to the current settings

  var newCount = 1; // current number of homepages

  var homePageGroup = CanonifyURLList(GetHomePageGroup()).split("\n");

  GetHomePagePref(0).value = "about:blank"; // in case it's empty

  if (homePageGroup[0])

    // we have at least one homepage

    // (the last index is always empty due to canonification)

    newCount = homePageGroup.length - 1

    for (var i = 0; i < newCount; ++i)

      var pref = GetHomePagePref(i) || AddHomePagePref(i);

      pref.value = homePageGroup[i];

  // work around bug 410562:

  // reset unneeded preferences on dialogaccept only

  // update pref count watermark before setting new number of homepages

  var alreadyRequested = (gHomePagePrefPeak > 0);

  var oldCount = GetHomePagePrefCount();

  if (gHomePagePrefPeak < oldCount)

    gHomePagePrefPeak = oldCount;

  SetHomePagePrefCount(newCount);

  var needCleanup = (newCount < gHomePagePrefPeak);

  if (document.documentElement.instantApply)

    // throw away unneeded preferences now

    if (needCleanup)

      HomePagePrefCleanup();

  else if (needCleanup != alreadyRequested)

    // cleanup necessity changed

    if (needCleanup)

      // register OK handler for the capturing phase

      window.addEventListener("dialogaccept", this.HomePagePrefCleanup, true);

    else

      // no cleanup necessary, remove OK handler

      window.removeEventListener("dialogaccept", this.HomePagePrefCleanup, true);

function HomePagePrefCleanup()

  // remove the old user prefs values that we didn't overwrite

  var count = GetHomePagePrefCount();

  for (var j = count; j < gHomePagePrefPeak; ++j)

    // clear <preference>

    var pref = GetHomePagePref(j);

    pref.valueFromPreferences = undefined;

    pref.remove();

  gHomePagePrefPeak = 0; // cleanup done

function UpdateHomePageListFromInput()

  UpdateHomePagePrefs();

  UpdateHomePageButtons();

function UpdateHomePageList(aSingleURL)

  // write single URL into input box and set it as the list of homepages

  SetHomePageValue(aSingleURL);

  UpdateHomePageListFromInput();

function SelectFile()

  let fp = Cc["@mozilla.org/filepicker;1"]

             .createInstance(Ci.nsIFilePicker);

  let title = document.getElementById("bundle_prefutilities")

                      .getString("choosehomepage");

  fp.init(window, title, Ci.nsIFilePicker.modeOpen);

  fp.appendFilters(Ci.nsIFilePicker.filterAll  |

                   Ci.nsIFilePicker.filterText |

                   Ci.nsIFilePicker.filterXML  |

                   Ci.nsIFilePicker.filterHTML |

                   Ci.nsIFilePicker.filterImages);

  fp.open(rv => {

    if (rv == Ci.nsIFilePicker.returnOK && fp.fileURL.spec &&

        fp.fileURL.spec.length > 0) {

      UpdateHomePageList(fp.fileURL.spec);

});

function SetHomePageToCurrentPage()

  UpdateHomePageList(GetCurrentPage());

function SetHomePageToCurrentGroup()

  UpdateHomePageList(GetCurrentGroup());

function SetHomePageToDefaultPage()

  UpdateHomePageList(gDefaultHomePage);

function Startup()

  // homepage groups can have an arbitrary number of <preference>s,

  // except for the default (0), thus we create them manually here

  gPreferences = document.getElementById("navigator_preferences");

  var count = GetHomePagePrefCount();

  var homePageGroup = GetHomePagePref(0).value + "\n";

  for (var i = 1; i < count; ++i)

    homePageGroup += AddHomePagePref(i).value + "\n";

  gDefaultHomePage = CanonifyURLList(GetHomePagePref(0).defaultValue);

  SetHomePageValue(homePageGroup);

  UpdateHomePageButtons();

function SwitchPage(aIndex)

  document.getElementById("behaviourDeck").selectedIndex = aIndex;

function WriteConcurrentTabs()

  var val = document.getElementById("maxConcurrentTabsGroup").value;

  return val > 0 ? document.getElementById("maxConcurrentTabs").value : val;