/* 
 * The contents of this file are subject to the Netscape Public
 * License Version 1.1 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.mozilla.org/NPL/
 *  
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
 * implied. See the License for the specific language governing
 * rights and limitations under the License.
 *  
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 * 
 * The Initial Developer of the Original Code is Netscape
 * Communications Corporation. Portions created by Netscape are
 * Copyright (C) 1998-1999 Netscape Communications Corporation. All
 * Rights Reserved.
 * 
 * Contributor(s): 
 */

var MoreSection;
var title = "";
var author = "";
var description = "";
var authorElement;
var descriptionElement;
var insertNewAuthor = false;
var insertNewDescription = false;

//Cancel() is in EdDialogCommon.js
// dialog initialization code
function Startup()
{
  if (!InitEditorShell())
    return;

  dialog = new Object;
  if (!dialog)
  {
    dump("Failed to create dialog object!!!\n");
    window.close();
  }
  dialog.PageLocation     = document.getElementById("PageLocation");
  dialog.PageModDate      = document.getElementById("PageModDate");
  dialog.TitleInput       = document.getElementById("TitleInput");
  dialog.AuthorInput      = document.getElementById("AuthorInput");
  dialog.DescriptionInput = document.getElementById("DescriptionInput");
  dialog.MoreSection      = document.getElementById("MoreSection");
  dialog.MoreFewerButton  = document.getElementById("MoreFewerButton");

  doSetOKCancel(onOK, null);
  
  // Default string for new page is set from DTD string in XUL,
  //   so set only if not new doc URL
  var location = editorShell.editorDocument.location;
  if (location != "about:blank")
    dialog.PageLocation.setAttribute("value", editorShell.editorDocument.location);

  authorElement = GetMetaElement("author");
  if (!authorElement)
  {
    authorElement = CreateMetaElement("author");
    if (!authorElement)
      window.close();

    insertNewAuthor = true;
  }

  descriptionElement = GetMetaElement("description");
  if (!descriptionElement)
  {
    descriptionElement = CreateMetaElement("description");
    if (!descriptionElement)
      window.close();

    insertNewDescription = true;
  }

  InitMoreFewer();
  InitDialog();

  dialog.TitleInput.focus();
}

function InitDialog()
{
  dialog.TitleInput.value = editorShell.GetDocumentTitle();
  dialog.AuthorInput.value = authorElement.getAttribute("content");
  dialog.DescriptionInput.value = descriptionElement.getAttribute("content");
}


function GetMetaElement(name)
{
  if (name)
  {
    name = name.toLowerCase();
    if (name != "")
    {
      var metaNodes = editorShell.editorDocument.getElementsByTagName("meta");
      if (metaNodes && metaNodes.length > 0)
      {
        for (var i = 0; i < metaNodes.length; i++)
        {
          var metaNode = metaNodes.item(i);
          if (metaNode && metaNode.getAttribute("name") == name)
            return metaNode;
        }
      }
    }
  }
  return null;
}

function CreateMetaElement(name)
{
  metaElement = editorShell.CreateElementWithDefaults("meta");
  if (metaElement)
    metaElement.setAttribute("name", name);
  else
    dump("Failed to create metaElement!\n");
  
  return metaElement;
}

function CreateHTTPEquivElement(name)
{
  metaElement = editorShell.CreateElementWithDefaults("meta");
  if (metaElement)
    metaElement.setAttribute("http-equiv", name);
  else
    dump("Failed to create metaElement for http-equiv!\n");
  
  return metaElement;
}

// Change "content" attribute on a META element,
//   or delete entire element it if content is empty
// This uses undoable editor transactions 
function SetMetaElementContent(metaElement, content, insertNew)
{
  if (metaElement)
  {
    if(!content || content == "")
    {
      if (!insertNew)
        editorShell.DeleteElement(metaElement);
    }
    else
    {
      if (insertNew)
      {
        // Don't need undo for set attribute, just for InsertElement
        metaElement.setAttribute("content", content);
        AppendHeadElement(metaElement);
      }
      else
        editorShell.SetAttribute(metaElement, "content", content);
    }
  }
}

function GetHeadElement()
{
  var headList = editorShell.editorDocument.getElementsByTagName("head");
  if (headList)
    return headList.item(0);
  
  return null;
}

function AppendHeadElement(element)
{
  var head = GetHeadElement();
  if (head)
    head.appendChild(element);
}

function ValidateData()
{
  title = dialog.TitleInput.value.trimString();
  author = dialog.AuthorInput.value.trimString();
  description = dialog.DescriptionInput.value.trimString();
  return true;
}

function onOK()
{
  if (ValidateData())
  {
    editorShell.BeginBatchChanges();

    // Set title contents even if string is empty
    //  because TITLE is a required HTML element
    editorShell.SetDocumentTitle(title);
    
    SetMetaElementContent(authorElement, author, insertNewAuthor);
    SetMetaElementContent(descriptionElement, description, insertNewDescription);

    editorShell.EndBatchChanges();
    return true; // do close the window
  }
  return false;
}