/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla 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/MPL/
 *
 * 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.org code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2000
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Vidur Apparao <vidur@netscape.com> (original author)
 *   Johnny Stenback <jst@netscape.com>
 *   Jonas Sicking <sicking@bigfoot.com>
 *   Ms2ger <ms2ger@gmail.com>
 *   Tom Pixley <joki@netscape.com>
 *   Boris Zbarsky <bzbarsky@mit.edu>
 *   Robert Sayre <sayrer@gmail.com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "nsIDOMNode.idl"

interface nsIDOMNodeIterator;
interface nsIDOMNodeFilter;
interface nsIDOMTreeWalker;
interface nsIDOMLocation;

/**
 * The nsIDOMDocument interface represents the entire HTML or XML document.
 * Conceptually, it is the root of the document tree, and provides the 
 * primary access to the document's data.
 * Since elements, text nodes, comments, processing instructions, etc. 
 * cannot exist outside the context of a Document, the nsIDOMDocument 
 * interface also contains the factory methods needed to create these 
 * objects.
 *
 * For more information on this interface please see 
 * http://dvcs.w3.org/hg/domcore/raw-file/tip/Overview.html
 */

[scriptable, uuid(10034b87-384e-4e19-902c-c4edafb899be)]
interface nsIDOMDocument : nsIDOMNode
{
  readonly attribute nsIDOMDocumentType         doctype;
  readonly attribute nsIDOMDOMImplementation    implementation;
  readonly attribute nsIDOMElement              documentElement;
  nsIDOMElement                 createElement(in DOMString tagName)
                                  raises(DOMException);
  nsIDOMDocumentFragment        createDocumentFragment();
  nsIDOMText                    createTextNode(in DOMString data);
  nsIDOMComment                 createComment(in DOMString data);
  nsIDOMCDATASection            createCDATASection(in DOMString data)
                                  raises(DOMException);
  nsIDOMProcessingInstruction   createProcessingInstruction(in DOMString target, 
                                                            in DOMString data)
                                  raises(DOMException);
  nsIDOMAttr                    createAttribute(in DOMString name)
                                  raises(DOMException);
  nsIDOMNodeList                getElementsByTagName(in DOMString tagname);

  // Introduced in DOM Level 2:
  nsIDOMNode                    importNode(in nsIDOMNode importedNode,
                                           in boolean deep)
                                  raises(DOMException);
  // Introduced in DOM Level 2:
  nsIDOMElement                 createElementNS(in DOMString namespaceURI,
                                                in DOMString qualifiedName)
                                  raises(DOMException);
  // Introduced in DOM Level 2:
  nsIDOMAttr                    createAttributeNS(in DOMString namespaceURI,
                                                  in DOMString qualifiedName)
                                  raises(DOMException);
  // Introduced in DOM Level 2:
  nsIDOMNodeList                getElementsByTagNameNS(in DOMString namespaceURI,
                                                       in DOMString localName);
  // Introduced in DOM Level 2:
  nsIDOMElement                 getElementById(in DOMString elementId);
  // Introduced in DOM Level 3:
  readonly attribute DOMString       inputEncoding;
  // Introduced in DOM Level 3:
  readonly attribute DOMString       xmlEncoding;
  // Introduced in DOM Level 3:
           attribute boolean         xmlStandalone;
                                        // raises(DOMException) on setting
  // Introduced in DOM Level 3:
           attribute DOMString       xmlVersion;
                                        // raises(DOMException) on setting
  // Introduced in DOM Level 3:
           attribute DOMString       documentURI;
  // Introduced in DOM Level 3:
  nsIDOMNode         adoptNode(in nsIDOMNode source)
                                        raises(DOMException);

  /**
   * Create a range
   *
   * @see http://html5.org/specs/dom-range.html#dom-document-createrange
   */
  nsIDOMRange              createRange();

  nsIDOMNodeIterator createNodeIterator(in nsIDOMNode root,
                                        in unsigned long whatToShow,
                                        in nsIDOMNodeFilter filter,
                                        in boolean entityReferenceExpansion)
                                        raises(DOMException);
  nsIDOMTreeWalker   createTreeWalker(in nsIDOMNode root,
                                      in unsigned long whatToShow,
                                      in nsIDOMNodeFilter filter,
                                      in boolean entityReferenceExpansion)
                                        raises(DOMException);

  nsIDOMEvent               createEvent(in DOMString eventType)
                                               raises(DOMException);


  // HTML
  /**
   * The window associated with this document.
   *
   * @see <http://www.whatwg.org/html/#dom-document-defaultview>
   */
  readonly attribute nsIDOMWindow   defaultView;

  /**
   * @see <http://www.whatwg.org/html/#dom-document-characterset>
   */
  readonly attribute DOMString      characterSet;
  /**
   * @see <http://www.whatwg.org/html/#dom-document-dir>
   */
           attribute DOMString      dir;

  /**
   * @see <http://www.whatwg.org/html/#dom-document-location>
   */
  readonly attribute nsIDOMLocation location;

  /**
   * @see <http://www.whatwg.org/html/#document.title>
   */
           attribute DOMString      title;

  /**
   * @see <http://www.whatwg.org/html/#dom-document-readystate>
   */
  readonly attribute DOMString      readyState;
  /**
   * @see <http://www.whatwg.org/html/#dom-document-lastmodified>
   */
  readonly attribute DOMString      lastModified;
  /**
   * @see <http://www.whatwg.org/html/#dom-document-referrer>
   */
  readonly attribute DOMString      referrer;

  /**
   * @see <http://www.whatwg.org/html/#dom-document-hasfocus>
   */
  boolean      hasFocus();

  /**
   * @see <http://www.whatwg.org/html/#dom-document-activeelement>
   */
  readonly attribute nsIDOMElement  activeElement;

  /**
   * Retrieve elements matching all classes listed in a
   * space-separated string.
   *
   * @see <http://www.whatwg.org/html/#dom-document-getelementsbyclassname>
   */
  nsIDOMNodeList getElementsByClassName(in DOMString classes);


  // CSSOM
  /**
   * @see <http://dev.w3.org/csswg/cssom/#dom-document-stylesheets>
   */
  readonly attribute nsIDOMStyleSheetList   styleSheets;

  /**
   * This attribute must return the preferred style sheet set as set by the
   * author. It is determined from the order of style sheet declarations and
   * the Default-Style HTTP headers, as eventually defined elsewhere in the Web
   * Apps 1.0 specification. If there is no preferred style sheet set, this
   * attribute must return the empty string. The case of this attribute must
   * exactly match the case given by the author where the preferred style sheet
   * is specified or implied. This attribute must never return null.
   *
   * @see <http://dev.w3.org/csswg/cssom/#dom-document-preferredStyleSheetSet>
   */
  readonly attribute DOMString preferredStyleSheetSet;

  /**
   * This attribute indicates which style sheet set is in use. This attribute
   * is live; changing the disabled attribute on style sheets directly will
   * change the value of this attribute.
   *
   * If all the sheets that are enabled and have a title have the same title
   * (by case-sensitive comparisons) then the value of this attribute must be
   * exactly equal to the title of the first enabled style sheet with a title
   * in the styleSheets list. Otherwise, if style sheets from different sets
   * are enabled, then the return value must be null (there is no way to
   * determine what the currently selected style sheet set is in those
   * conditions). Otherwise, either all style sheets that have a title are
   * disabled, or there are no alternate style sheets, and
   * selectedStyleSheetSet must return the empty string.
   *
   * Setting this attribute to the null value must have no effect.
   *
   * Setting this attribute to a non-null value must call
   * enableStyleSheetsForSet() with that value as the function's argument, and
   * set lastStyleSheetSet to that value.
   *
   * From the DOM's perspective, all views have the same
   * selectedStyleSheetSet. If a UA supports multiple views with different
   * selected alternate style sheets, then this attribute (and the StyleSheet
   * interface's disabled attribute) must return and set the value for the
   * default view.
   *
   * @see <http://dev.w3.org/csswg/cssom/#dom-document-selectedStyleSheetSet>
   */
  attribute DOMString selectedStyleSheetSet;

  /*
   * This property must initially have the value null. Its value changes when
   * the selectedStyleSheetSet attribute is set.
   *
   * @see <http://dev.w3.org/csswg/cssom/#dom-document-lastStyleSheetSet>
   */
  readonly attribute DOMString lastStyleSheetSet;
  
  /**
   * This must return the live list of the currently available style sheet
   * sets. This list is constructed by enumerating all the style sheets for
   * this document available to the implementation, in the order they are
   * listed in the styleSheets attribute, adding the title of each style sheet
   * with a title to the list, avoiding duplicates by dropping titles that
   * match (case-sensitively) titles that have already been added to the
   * list.
   *
   * @see <http://dev.w3.org/csswg/cssom/#dom-document-styleSheetSets>
   */
  readonly attribute nsIDOMDOMStringList styleSheetSets;

  /**
   * Calling this method must change the disabled attribute on each StyleSheet
   * object with a title attribute with a length greater than 0 in the
   * styleSheets attribute, so that all those whose title matches the name
   * argument are enabled, and all others are disabled. Title matches must be
   * case-sensitive. Calling this method with the empty string disables all
   * alternate and preferred style sheets (but does not change the state of
   * persistent style sheets, that is those with no title attribute).
   *
   * Calling this method with a null value must have no effect.
   *
   * Style sheets that do not have a title are never affected by this
   * method. This method does not change the values of the lastStyleSheetSet or
   * preferredStyleSheetSet attributes.
   *
   * @see <http://dev.w3.org/csswg/cssom/#dom-document-enableStyleSheetsForSet>
   */
  void enableStyleSheetsForSet(in DOMString name);


  // CSSOM-View
  /**
   * Returns the element from the caller's document at the given point,
   * relative to the upper-left-most point in the (possibly scrolled)
   * window or frame.
   *
   * If the element at the given point belongs to another document (such as
   * an iframe's subdocument), the element in the calling document's DOM
   * (e.g. the iframe) is returned. If the element at the given point is
   * anonymous or XBL generated content, such as a textbox's scrollbars, then
   * the first non-anonymous parent element (that is, the textbox) is returned.
   *
   * This method returns null if either coordinate is negative, or if the
   * specified point lies outside the visible bounds of the document.
   *
   * Callers from XUL documents should wait until the onload event has fired
   * before calling this method.
   *
   * @see <http://dev.w3.org/csswg/cssom-view/#dom-document-elementfrompoint>
   */
  nsIDOMElement             elementFromPoint(in float x, in float y);


  // Mozilla extensions
  /**
   * @see <https://developer.mozilla.org/en/DOM/document.contentType>
   */
  readonly attribute DOMString      contentType;

  /**
   * True if this document is synthetic : stand alone image, video, audio file,
   * etc.
   */
  readonly attribute boolean        mozSyntheticDocument;

  /**
   * Returns the script element whose script is currently being processed.
   *
   * @see <https://developer.mozilla.org/en/DOM/document.currentScript>
   */
  readonly attribute nsIDOMElement  currentScript;

  /**
   * Release the current mouse capture if it is on an element within this
   * document.
   *
   * @see <https://developer.mozilla.org/en/DOM/document.releaseCapture>
   */
  void releaseCapture();

  /**
   * Use the given DOM element as the source image of target |-moz-element()|.
   *
   * This function introduces a new special ID (called "image element ID"),
   * which is only used by |-moz-element()|, and associates it with the given
   * DOM element.  Image elements ID's have the higher precedence than general
   * HTML id's, so if |document.mozSetImageElement(<id>, <element>)| is called,
   * |-moz-element(#<id>)| uses |<element>| as the source image even if there
   * is another element with id attribute = |<id>|.  To unregister an image
   * element ID |<id>|, call |document.mozSetImageElement(<id>, null)|.
   *
   * Example:
   * <script>
   *   canvas = document.createElement("canvas");
   *   canvas.setAttribute("width", 100);
   *   canvas.setAttribute("height", 100);
   *   // draw to canvas
   *   document.mozSetImageElement("canvasbg", canvas);
   * </script>
   * <div style="background-image: -moz-element(#canvasbg);"></div>
   *
   * @param aImageElementId an image element ID to associate with
   * |aImageElement|
   * @param aImageElement a DOM element to be used as the source image of
   * |-moz-element(#aImageElementId)|. If this is null, the function will
   * unregister the image element ID |aImageElementId|.
   *
   * @see <https://developer.mozilla.org/en/DOM/document.mozSetImageElement>
   */
  void mozSetImageElement(in DOMString aImageElementId,
                          in nsIDOMElement aImageElement);
};
