/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** 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) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Sammy Ford
 *
 * 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 "nsISupports.idl"
#include "nsISelection.idl"
#include "nsISelectionDisplay.idl"

%{C++
typedef short SelectionType;
typedef short SelectionRegion;
%}

interface nsIDOMNode;
interface nsISelection;
interface nsISelectionDisplay;

[scriptable, uuid(e0dd9365-470b-4ee8-b644-54add1c4c73f)]
interface nsISelectionController : nsISelectionDisplay
{
   const short SELECTION_NONE=0;
   const short SELECTION_NORMAL=1;
   const short SELECTION_SPELLCHECK=2;
   const short SELECTION_IME_RAWINPUT=4;
   const short SELECTION_IME_SELECTEDRAWTEXT=8;
   const short SELECTION_IME_CONVERTEDTEXT=16;
   const short SELECTION_IME_SELECTEDCONVERTEDTEXT=32;
   const short SELECTION_ACCESSIBILITY=64; // For accessibility API usage
   const short SELECTION_FIND=128;
   const short SELECTION_URLSECONDARY=256;
   const short NUM_SELECTIONTYPES=10;

   const short SELECTION_ANCHOR_REGION = 0;
   const short SELECTION_FOCUS_REGION = 1;
   const short SELECTION_WHOLE_SELECTION = 2;
   const short NUM_SELECTION_REGIONS = 3;

   const short SELECTION_OFF = 0;
   const short SELECTION_HIDDEN =1;//>HIDDEN displays selection
   const short SELECTION_ON = 2;
   const short SELECTION_DISABLED = 3;
   const short SELECTION_ATTENTION = 4;

   /**
   * SetDisplaySelection will set the display mode for the selection. OFF,ON,DISABLED
   */
    void    setDisplaySelection(in short toggle);

   /**
   * GetDisplaySelection will get the display mode for the selection. OFF,ON,DISABLED
   */
    short   getDisplaySelection();

   /**
   * GetSelection will return the selection that the presentation
   *  shell may implement.
   *
   * @param aType will hold the type of selection //SelectionType
   * @param _return will hold the return value
   */
    nsISelection getSelection(in short type);

   const short SCROLL_SYNCHRONOUS = 1<<1;
   const short SCROLL_FIRST_ANCESTOR_ONLY = 1<<2;

   /**
   * ScrollSelectionIntoView scrolls a region of the selection,
   * so that it is visible in the scrolled view.
   *
   * @param aType the selection to scroll into view. //SelectionType
   * @param aRegion the region inside the selection to scroll into view. //SelectionRegion
   * @param aFlags the scroll flags.  Valid bits include:
   * SCROLL_SYNCHRONOUS: when set, scrolls the selection into view
   * before returning. If not set, posts a request which is processed
   * at some point after the method returns.
   * SCROLL_FIRST_ANCESTOR_ONLY: if set, only the first ancestor will be scrolled
   * into view.
   *
   * Note that if isSynchronous is true, then this might flush the pending
   * reflow. It's dangerous for some objects. See bug 418470 comment 12.
   */
    void scrollSelectionIntoView(in short type, in short region, in short flags);

   /**
   * RepaintSelection repaints the selection specified by aType.
   *
   * @param aType specifies the selection to repaint.
   */
    void repaintSelection(in short type);

   /**
   * Set the caret as enabled or disabled. An enabled caret will
   * draw or blink when made visible. A disabled caret will never show up.
   * Can be called any time.
   * @param aEnable PR_TRUE to enable caret.  PR_FALSE to disable.
   * @return always NS_OK
   */

    void setCaretEnabled(in boolean enabled);

   /**
   * Set the caret readonly or not. An readonly caret will
   * draw but not blink when made visible. 
   * @param aReadOnly PR_TRUE to enable caret.  PR_FALSE to disable.
   * @return always NS_OK
   */
    void setCaretReadOnly(in boolean readOnly);

   /**
   * Gets the current state of the caret.
   * @param aEnabled  [OUT] set to the current caret state, as set by SetCaretEnabled
   * @return   if aOutEnabled==null, returns NS_ERROR_INVALID_ARG
   *           else NS_OK
   */
    boolean getCaretEnabled();

    /**
    * This is true if the caret is enabled, visible, and currently blinking.
    * This is still true when the caret is enabled, visible, but in its "off"
    * blink cycle.
    */
    readonly attribute boolean caretVisible;
    
   /**
   * Show the caret even in selections. By default the caret is hidden unless the
   * selection is collapsed. Use this function to show the caret even in selections.
   * @param aVisibility PR_TRUE to show the caret in selections.  PR_FALSE to hide.
   * @return always NS_OK
   */
    void setCaretVisibilityDuringSelection(in boolean visibility);

   /** CharacterMove will move the selection one character forward/backward in the document.
   *  this will also have the effect of collapsing the selection if the aExtend = PR_FALSE
   *  the "point" of selection that is extended is considered the "focus" point. 
   *  or the last point adjusted by the selection.
   *  @param aForward forward or backward if PR_FALSE
   *  @param aExtend  should it collapse the selection of extend it?
   */
    void characterMove(in boolean forward, in boolean extend);

   /**
    * CharacterExtendForDelete will extend the selection one character cell
    * forward in the document.
    * this method is used internally for handling del key.
    */
    [noscript] void characterExtendForDelete();

   /**
    * CharacterExtendForBackspace will extend the selection one character cell
    * backward in the document.
    * this method is used internally for handling backspace key only when we're
    * after UTF-16 surrogates.
    */
    [noscript] void characterExtendForBackspace();

   /** WordMove will move the selection one word forward/backward in the document.
   *  this will also have the effect of collapsing the selection if the aExtend = PR_FALSE
   *  the "point" of selection that is extended is considered the "focus" point. 
   *  or the last point adjusted by the selection.
   *  @param aForward forward or backward if PR_FALSE
   *  @param aExtend  should it collapse the selection of extend it?
   */

    void wordMove(in boolean forward, in boolean extend);

   /** wordExtendForDelete will extend the selection one word forward/backward in the document.
   *  this method is used internally for handling ctrl[option]-backspace and ctrl[option]-del.
   *  @param aForward forward or backward if PR_FALSE
   */
    [noscript] void wordExtendForDelete(in boolean forward);

    /** LineMove will move the selection one line forward/backward in the document.
   *  this will also have the effect of collapsing the selection if the aExtend = PR_FALSE
   *  the "point" of selection that is extended is considered the "focus" point. 
   *  or the last point adjusted by the selection.
   *  @param aForward forward or backward if PR_FALSE
   *  @param aExtend  should it collapse the selection of extend it?
   */
    void lineMove(in boolean forward, in boolean extend);

  /** IntraLineMove will move the selection to the front of the line or end of the line
   *  in the document.
   *  this will also have the effect of collapsing the selection if the aExtend = PR_FALSE
   *  the "point" of selection that is extended is considered the "focus" point. 
   *  or the last point adjusted by the selection.
   *  @param aForward forward or backward if PR_FALSE
   *  @param aExtend  should it collapse the selection of extend it?
   */
    void intraLineMove(in boolean forward, in boolean extend);

  /** PageMove will move the selection one page forward/backward in the document.
   *  this will also have the effect of collapsing the selection if the aExtend = PR_FALSE
   *  the "point" of selection that is extended is considered the "focus" point. 
   *  or the last point adjusted by the selection.
   *  @param aForward forward or backward if PR_FALSE
   *  @param aExtend  should it collapse the selection of extend it?
   */
    void pageMove(in boolean forward, in boolean extend);

  /** CompleteScroll will move page view to the top or bottom of the document
   *  @param aForward forward or backward if PR_FALSE
   */
    void completeScroll(in boolean forward);

  /** CompleteMove will move page view to the top or bottom of the document
   *  this will also have the effect of collapsing the selection if the aExtend = PR_FALSE
   *  the "point" of selection that is extended is considered the "focus" point. 
   *  or the last point adjusted by the selection.
   *  @param aForward forward or backward if PR_FALSE
   *  @param aExtend  should it collapse the selection of extend it?
   */
    void completeMove(in boolean forward, in boolean extend);


  /** ScrollPage will scroll the page without affecting the selection.
   *  @param aForward scroll forward or backwards in selection
   */
    void scrollPage(in boolean forward);

  /** ScrolLine will scroll line up or down dependent on the boolean
   *  @param aForward scroll forward or backwards in selection
   */
	  void scrollLine(in boolean forward);

  /** ScrolHorizontal will scroll left or right dependent on the boolean
   *  @param aLeft if true will scroll left. if not will scroll right.
   */
	  void scrollHorizontal(in boolean left);
  /** SelectAll will select the whole page
   */
    void selectAll();

  /** CheckVisibility will return true if textnode and offsets are actually rendered 
   *  in the current precontext.
   *  @param aNode textNode to test
   *  @param aStartOffset  offset in dom to first char of textnode to test
   *  @param aEndOffset    offset in dom to last char of textnode to test
   *  @param aReturnBool   boolean returned TRUE if visible FALSE if not
   */
    boolean checkVisibility(in nsIDOMNode node, in short startOffset, in short endOffset);

};
%{ C++
   #define NS_ISELECTIONCONTROLLER_CID \
   { 0x513b9460, 0xd56a, 0x4c4e, \
   { 0xb6, 0xf9, 0x0b, 0x8a, 0xe4, 0x37, 0x2a, 0x3b }}
%}
