browserViewMenu.js

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/*
 * This file contains the code that is required to support the view menu
 * functionality copied from Firefox.  See:
 * http://mxr.mozilla.org/seamonkey/source/browser/base/content/browser.js
 */

function delayedStartup() {
  if ( typeof gBrowser != 'undefined' ) {  // if (!gBrowser) causes javascript error
    gBrowser.addEventListener("pageshow", function(evt) {
      setTimeout(charsetLoadListener, 0, evt);
    }, true);
  }
}

window.addEventListener("load", function(e) {
  setTimeout(delayedStartup, 0);
}, false);

var nsIWebNavigation = Components.interfaces.nsIWebNavigation;

var gPrevCharset = null;
var gCharsetMenu = null;
var gLastBrowserCharset = null;
var gInPrintPreviewMode = false;

function MultiplexHandler(event)
{ try {
    var node = event.target;
    var name = node.getAttribute('name');

    if (name == 'detectorGroup') {
        SetForcedDetector(true);
        SelectDetector(event, false);
    } else if (name == 'charsetGroup') {
        var charset = node.getAttribute('id');
        charset = charset.substring('charset.'.length, charset.length)
        SetForcedCharset(charset);
    } else if (name == 'charsetCustomize') {
        //do nothing - please remove this else statement, once the charset prefs moves to the pref window
    } else {
        SetForcedCharset(node.getAttribute('id'));
    }
    } catch(ex) { alert(ex); }
}

function SelectDetector(event, doReload)
{
    var uri =  event.target.getAttribute("id");
    var prefvalue = uri.substring('chardet.'.length, uri.length);
    if ("off" == prefvalue) { // "off" is special value to turn off the detectors
        prefvalue = "";
    }

    try {
        var pref = Components.classes["@mozilla.org/preferences-service;1"]
                             .getService(Components.interfaces.nsIPrefBranch);
        var str =  Components.classes["@mozilla.org/supports-string;1"]
                             .createInstance(Components.interfaces.nsISupportsString);

        str.data = prefvalue;
        pref.setComplexValue("intl.charset.detector",
                             Components.interfaces.nsISupportsString, str);
        if (doReload) window.content.location.reload();
    }
    catch (ex) {
        dump("Failed to set the intl.charset.detector preference.\n");
    }
}

function SetForcedDetector(doReload)
{
    BrowserSetForcedDetector(doReload);
}

function SetForcedCharset(charset)
{
    BrowserSetForcedCharacterSet(charset);
}

function BrowserSetForcedCharacterSet(aCharset)
{
  var docCharset = getBrowser().selectedBrowser.docShell.QueryInterface(
                            Components.interfaces.nsIDocCharset);
  docCharset.charset = aCharset;
  BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_CHARSET_CHANGE);
}

function BrowserSetForcedDetector(doReload)
{
  gBrowser.selectedBrowser.documentCharsetInfo.forcedDetector = true;
  if (doReload)
    BrowserReloadWithFlags(nsIWebNavigation.LOAD_FLAGS_CHARSET_CHANGE);
}

function UpdateCurrentCharset()
{
    var menuitem = null;

    // exctract the charset from DOM
    var wnd = document.commandDispatcher.focusedWindow;
    if ((window == wnd) || (wnd == null)) wnd = window.content;
    menuitem = document.getElementById('charset.' + wnd.document.characterSet);

    if (menuitem) {
        // uncheck previously checked item to workaround Mac checkmark problem
        // bug 98625
        if (gPrevCharset) {
            var pref_item = document.getElementById('charset.' + gPrevCharset);
            if (pref_item)
              pref_item.setAttribute('checked', 'false');
        }
        menuitem.setAttribute('checked', 'true');
    }
}

function UpdateCharsetDetector()
{
    var prefvalue;

    try {
        var pref = Components.classes["@mozilla.org/preferences-service;1"]
                             .getService(Components.interfaces.nsIPrefBranch);
        prefvalue = pref.getComplexValue("intl.charset.detector",
                                         Components.interfaces.nsIPrefLocalizedString).data;
    }
    catch (ex) {
        prefvalue = "";
    }

    if (prefvalue == "") prefvalue = "off";
    dump("intl.charset.detector = "+ prefvalue + "\n");

    prefvalue = 'chardet.' + prefvalue;
    var menuitem = document.getElementById(prefvalue);

    if (menuitem) {
        menuitem.setAttribute('checked', 'true');
    }
}

function UpdateMenus(event)
{
    // use setTimeout workaround to delay checkmark the menu
    // when onmenucomplete is ready then use it instead of oncreate
    // see bug 78290 for the detail
    UpdateCurrentCharset();
    setTimeout(UpdateCurrentCharset, 0);
    UpdateCharsetDetector();
    setTimeout(UpdateCharsetDetector, 0);
}

function CreateMenu(node)
{
  var observerService = Components.classes["@mozilla.org/observer-service;1"].getService(Components.interfaces.nsIObserverService);
  observerService.notifyObservers(null, "charsetmenu-selected", node);
}

function charsetLoadListener (event)
{
    var charset = window.content.document.characterSet;

    if (charset.length > 0 && (charset != gLastBrowserCharset)) {
        if (!gCharsetMenu)
          gCharsetMenu = Components.classes['@mozilla.org/rdf/datasource;1?name=charset-menu'].getService().QueryInterface(Components.interfaces.nsICurrentCharsetListener);
        gCharsetMenu.SetCurrentCharset(charset);
        gPrevCharset = gLastBrowserCharset;
        gLastBrowserCharset = charset;
    }
}

function getBrowser()
{
  if (!gBrowser)
    gBrowser = document.getElementById("content");
  return gBrowser;
}

function getMarkupDocumentViewer()
{
  return gBrowser.selectedBrowser.markupDocumentViewer;
}

/* Begin Page Style Functions */
function getStyleSheetArray(frame)
{
  var styleSheets = frame.document.styleSheets;
  var styleSheetsArray = new Array(styleSheets.length);
  for (var i = 0; i < styleSheets.length; i++) {
    styleSheetsArray[i] = styleSheets[i];
  }
  return styleSheetsArray;
}

function getAllStyleSheets(frameset)
{
  var styleSheetsArray = getStyleSheetArray(frameset);
  for (var i = 0; i < frameset.frames.length; i++) {
    var frameSheets = getAllStyleSheets(frameset.frames[i]);
    styleSheetsArray = styleSheetsArray.concat(frameSheets);
  }
  return styleSheetsArray;
}

function stylesheetFillPopup(menuPopup)
{
  var noStyle = menuPopup.firstChild;
  var persistentOnly = noStyle.nextSibling;
  var sep = persistentOnly.nextSibling;
  while (sep.nextSibling)
    menuPopup.removeChild(sep.nextSibling);

  var styleSheets = getAllStyleSheets(window.content);
  var currentStyleSheets = [];
  var styleDisabled = getMarkupDocumentViewer().authorStyleDisabled;
  var haveAltSheets = false;
  var altStyleSelected = false;

  for (var i = 0; i < styleSheets.length; ++i) {
    var currentStyleSheet = styleSheets[i];

    // Skip any stylesheets that don't match the screen media type.
    var media = currentStyleSheet.media.mediaText.toLowerCase();
    if (media && (media.indexOf("screen") == -1) && (media.indexOf("all") == -1))
        continue;

    if (currentStyleSheet.title) {
      if (!currentStyleSheet.disabled)
        altStyleSelected = true;

      haveAltSheets = true;

      var lastWithSameTitle = null;
      if (currentStyleSheet.title in currentStyleSheets)
        lastWithSameTitle = currentStyleSheets[currentStyleSheet.title];

      if (!lastWithSameTitle) {
        var menuItem = document.createElement("menuitem");
        menuItem.setAttribute("type", "radio");
        menuItem.setAttribute("label", currentStyleSheet.title);
        menuItem.setAttribute("data", currentStyleSheet.title);
        menuItem.setAttribute("checked", !currentStyleSheet.disabled && !styleDisabled);
        menuPopup.appendChild(menuItem);
        currentStyleSheets[currentStyleSheet.title] = menuItem;
      } else {
        if (currentStyleSheet.disabled)
          lastWithSameTitle.removeAttribute("checked");
      }
    }
  }

  noStyle.setAttribute("checked", styleDisabled);
  persistentOnly.setAttribute("checked", !altStyleSelected && !styleDisabled);
  persistentOnly.hidden = (window.content.document.preferredStyleSheetSet) ? haveAltSheets : false;
  sep.hidden = (noStyle.hidden && persistentOnly.hidden) || !haveAltSheets;
  return true;
}

function stylesheetInFrame(frame, title) {
  var docStyleSheets = frame.document.styleSheets;

  for (var i = 0; i < docStyleSheets.length; ++i) {
    if (docStyleSheets[i].title == title)
      return true;
  }
  return false;
}

function stylesheetSwitchFrame(frame, title) {
  var docStyleSheets = frame.document.styleSheets;

  for (var i = 0; i < docStyleSheets.length; ++i) {
    var docStyleSheet = docStyleSheets[i];

    if (title == "_nostyle")
      docStyleSheet.disabled = true;
    else if (docStyleSheet.title)
      docStyleSheet.disabled = (docStyleSheet.title != title);
    else if (docStyleSheet.disabled)
      docStyleSheet.disabled = false;
  }
}

function stylesheetSwitchAll(frameset, title) {
  if (!title || title == "_nostyle" || stylesheetInFrame(frameset, title)) {
    stylesheetSwitchFrame(frameset, title);
  }
  for (var i = 0; i < frameset.frames.length; i++) {
    stylesheetSwitchAll(frameset.frames[i], title);
  }
}

function setStyleDisabled(disabled) {
  getMarkupDocumentViewer().authorStyleDisabled = disabled;
}

/* End of the Page Style functions */

function BrowserViewSourceOfDocument(aDocument)
{
  var pageCookie;
  var webNav;

  // Get the document charset
  var docCharset = "charset=" + aDocument.characterSet;

  // Get the nsIWebNavigation associated with the document
  try {
      var win;
      var ifRequestor;

      // Get the DOMWindow for the requested document.  If the DOMWindow
      // cannot be found, then just use the content window...
      //
      // XXX:  This is a bit of a hack...
      win = aDocument.defaultView;
      if (win == window) {
        win = content;
      }
      ifRequestor = win.QueryInterface(Components.interfaces.nsIInterfaceRequestor);

      webNav = ifRequestor.getInterface(nsIWebNavigation);
  } catch(err) {
      // If nsIWebNavigation cannot be found, just get the one for the whole
      // window...
      webNav = getWebNavigation();
  }
  //
  // Get the 'PageDescriptor' for the current document. This allows the
  // view-source to access the cached copy of the content rather than
  // refetching it from the network...
  //
  try{
    var PageLoader = webNav.QueryInterface(Components.interfaces.nsIWebPageDescriptor);

    pageCookie = PageLoader.currentDescriptor;
  } catch(err) {
    // If no page descriptor is available, just use the view-source URL...
  }

  ViewSourceOfURL(webNav.currentURI.spec, pageCookie, aDocument);
}

function ViewSourceOfURL(aURL, aPageDescriptor, aDocument)
{
  var utils = window.top.gViewSourceUtils;
  if (getBoolPref("view_source.editor.external", false)) {
    utils.openInExternalEditor(aURL, aPageDescriptor, aDocument);
  }
  else {
    utils.openInInternalViewer(aURL, aPageDescriptor, aDocument);
  }
}