nsISelectionController Interface

 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)

 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)

 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)

 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)

 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()

 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)

 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)

 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)

 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)

 RepaintSelection repaints the selection specified by aType.

 @param aType specifies the selection to repaint.

void repaintSelection(in short type)

 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)

 ScrolLine will scroll line up or down dependent on the boolean
  @param aForward scroll forward or backwards in selection

void scrollLine(in boolean forward)

 ScrollPage will scroll the page without affecting the selection.
  @param aForward scroll forward or backwards in selection

void scrollPage(in boolean forward)

 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 aIsSynchronous when true, scrolls the selection into view
 before returning. If false, posts a request which is processed
 at some point after the method returns.

void scrollSelectionIntoView(in short type, in short region, in boolean isSynchronous)

 SelectAll will select the whole page

void selectAll()

 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)

 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)

 SetDisplaySelection will set the display mode for the selection. OFF,ON,DISABLED

void setDisplaySelection(in short toggle)

 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)