/// <summary>
/// Returns true if the caret is currently positioned at the specified line position.
/// </summary>
/// <param name="position"></param>
/// <returns></returns>
protected bool IsCaretAtLinePosition(LINE_POSITION position)
{
_DISPLAY_MOVEUNIT moveUnit;
if (position == LINE_POSITION.START)
{
moveUnit = _DISPLAY_MOVEUNIT.DISPLAY_MOVEUNIT_CurrentLineStart;
}
else
{
moveUnit = _DISPLAY_MOVEUNIT.DISPLAY_MOVEUNIT_CurrentLineEnd;
}
IDisplayServicesRaw displayServices = (IDisplayServicesRaw)HTMLElement.document;
IDisplayPointerRaw displayPointer, displayPointer2;
displayServices.CreateDisplayPointer(out displayPointer);
displayServices.CreateDisplayPointer(out displayPointer2);
IHTMLCaretRaw caret = GetCaret();
caret.MoveDisplayPointerToCaret(displayPointer);
displayPointer2.MoveToPointer(displayPointer);
displayPointer2.MoveUnit(moveUnit, -1);
bool areEqual;
displayPointer2.IsEqualTo(displayPointer, out areEqual);
return(areEqual);
}
protected bool IsCaretWithin(Rectangle clientRect)
{
IHTMLCaretRaw caret = GetCaret();
POINT p;
caret.GetLocation(out p, true);
Point pt = new Point(p.x, p.y);
return(pt.X >= clientRect.X && pt.X <= clientRect.Right && pt.Y >= clientRect.Y && pt.Y <= clientRect.Bottom);
}
protected virtual void ResetForDocumentComplete()
{
htmlCaret = null;
caretPositionDisplayPointer = null;
}
/// <summary>
/// Positions a MarkupPointer at the specfied caret.
/// </summary>
/// <param name="caret"></param>
/// <param name="p"></param>
public void MoveMarkupPointerToCaret(IHTMLCaretRaw caret, MarkupPointer p)
{
caret.MoveMarkupPointerToCaret(p.PointerRaw);
}
/// <summary>
/// Navigates the editor's caret to the next editable region.
/// </summary>
/// <param name="direction"></param>
private bool MoveCaretToNextRegion(MOVE_DIRECTION direction)
{
IHTMLElement nextRegion;
_ELEMENT_ADJACENCY nextRegionAdjacency;
bool preserveXLocation;
if (direction == MOVE_DIRECTION.UP || direction == MOVE_DIRECTION.LEFT)
{
nextRegion = PreviousEditableRegion;
nextRegionAdjacency = _ELEMENT_ADJACENCY.ELEM_ADJ_BeforeEnd;
preserveXLocation = direction == MOVE_DIRECTION.UP;
}
else if (direction == MOVE_DIRECTION.DOWN || direction == MOVE_DIRECTION.RIGHT)
{
nextRegion = NextEditableRegion;
nextRegionAdjacency = _ELEMENT_ADJACENCY.ELEM_ADJ_AfterBegin;
preserveXLocation = direction == MOVE_DIRECTION.DOWN;
if (nextRegion == null)
{
return(false);
}
MarkupPointer selectRegion = EditorContext.MarkupServices.CreateMarkupPointer(nextRegion, nextRegionAdjacency);
MarkupContext mc = selectRegion.Right(false);
if (mc.Context == _MARKUP_CONTEXT_TYPE.CONTEXT_TYPE_EnterScope && mc.Element is IHTMLElement3 && SmartContentSelection.SelectIfSmartContentElement(EditorContext, mc.Element) != null)
{
return(true);
}
}
else
{
throw new ArgumentException("Unsupported move direction detected: " + direction);
}
IDisplayServicesRaw displayServices = (IDisplayServicesRaw)HTMLElement.document;
IDisplayPointerRaw displayPointer;
displayServices.CreateDisplayPointer(out displayPointer);
IHTMLCaretRaw caret = GetCaret();
caret.MoveDisplayPointerToCaret(displayPointer);
ILineInfo lineInfo;
displayPointer.GetLineInfo(out lineInfo);
if (nextRegion != null)
{
MarkupPointer mp = EditorContext.MarkupServices.CreateMarkupPointer(nextRegion, nextRegionAdjacency);
DisplayServices.TraceMoveToMarkupPointer(displayPointer, mp);
try
{
caret.MoveCaretToPointer(displayPointer, true, _CARET_DIRECTION.CARET_DIRECTION_SAME);
if (preserveXLocation)
{
POINT caretLocation;
caret.GetLocation(out caretLocation, true);
caretLocation.x = lineInfo.x;
uint hitTestResults;
displayPointer.MoveToPoint(caretLocation, _COORD_SYSTEM.COORD_SYSTEM_GLOBAL, nextRegion, 0, out hitTestResults);
caret.MoveCaretToPointer(displayPointer, true, _CARET_DIRECTION.CARET_DIRECTION_SAME);
}
//BEP: using this line causes scrolling (nextRegion as IHTMLElement2).focus();
(nextRegion as IHTMLElement3).setActive();
return(true);
}
catch (Exception e)
{
Debug.Fail("Unexpected exception in MoveCaretToNextRegion: " + e.ToString());
}
caret.MoveCaretToPointer(displayPointer, true, _CARET_DIRECTION.CARET_DIRECTION_SAME);
}
return(false);
}
/// <summary>
/// Positions a MarkupPointer at the specified caret.
/// </summary>
/// <param name="caret"></param>
/// <param name="p"></param>
public void MoveMarkupPointerToCaret(IHTMLCaretRaw caret, MarkupPointer p)
{
caret.MoveMarkupPointerToCaret(p.PointerRaw);
}