/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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/. */


#include "nsISelectionDisplay.idl"

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

interface nsIContent;
interface nsIDOMNode;
interface nsISelection;
interface nsISelectionDisplay;

[scriptable, uuid(82c3a9df-9bd6-4da2-b561-d85a9eec5caa)]
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;
   const short SCROLL_CENTER_VERTICALLY = 1<<4;
   const short SCROLL_OVERFLOW_HIDDEN = 1<<5;

   /**
   * 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.
   * SCROLL_OVERFLOW_HIDDEN: if set, scrolls even if the overflow is specified
   * as hidden.
   *
   * 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);

   /** PhysicalMove will move the selection one "unit" in a given direction
   *  within 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 aDirection 
   *  @param aAmount    character/line; word/lineBoundary
   *  @param aExtend    should it collapse the selection of extend it?
   */
    void physicalMove(in short direction, in short amount, in boolean extend);

   /**
    * nsFrameSelection::PhysicalMove depends on the ordering of these values;
    * do not change without checking there!
    */
   const short MOVE_LEFT = 0;
   const short MOVE_RIGHT = 1;
   const short MOVE_UP = 2;
   const short MOVE_DOWN = 3;

   /**
    * 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);

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

  /** ScrollCharacter will scroll right or left dependent on the boolean
   *  @param aRight if true will scroll right. if not will scroll left.
   */
    void scrollCharacter(in boolean right);

  /** 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);
    [noscript,nostdcall] boolean checkVisibilityContent(in nsIContent node, in short startOffset, in short endOffset);

  /**
   * Returns the current visibility status of the selection carets, and allows
   * the visibility to be turned off, or on (if a selection exists).
   */
    attribute boolean selectionCaretsVisibility;
};
%{ C++
   #define NS_ISELECTIONCONTROLLER_CID \
   { 0x513b9460, 0xd56a, 0x4c4e, \
   { 0xb6, 0xf9, 0x0b, 0x8a, 0xe4, 0x37, 0x2a, 0x3b }}
%}
