void UnsafeNativeMethods.ITextStoreACP.GetTextExt(int viewCookie, int startIndex, int endIndex, out UnsafeNativeMethods.RECT rect, out bool clipped)
{
PresentationSource source;
IWin32Window win32Window;
CompositionTarget compositionTarget;
ITextView view;
ITextPointer startPointer;
ITextPointer endPointer;
GeneralTransform transform;
Point milPointTopLeft;
Point milPointBottomRight;
// We need to update the layout before getting rect. It could be dirty by SetText call of TIP.
_isInUpdateLayout = true;
UiScope.UpdateLayout();
_isInUpdateLayout = false;
// (Dev11 721274) if UpdateLayout caused a text change, startIndex
// and endIndex are no longer valid. Handling this correctly is quite
// difficult - Cicero assumes that the text can't change while it
// owns the lock. Instead, we artificially reset the char count (to
// keep VerifyTextStoreConsistency happy), and return TS_R_NOLAYOUT
// to the caller; this seems to be good enough (i.e. avoids crashes)
// in practice.
if (_hasTextChangedInUpdateLayout)
{
_netCharCount = this.TextContainer.IMECharCount;
throw new COMException(SR.Get(SRID.TextStore_TS_E_NOLAYOUT), UnsafeNativeMethods.TS_E_NOLAYOUT);
}
rect = new UnsafeNativeMethods.RECT();
clipped = false;
GetVisualInfo(out source, out win32Window, out view);
compositionTarget = source.CompositionTarget;
// We use local coordinates.
startPointer = CreatePointerAtCharOffset(startIndex, LogicalDirection.Forward);
startPointer.MoveToInsertionPosition(LogicalDirection.Forward);
if (!this.TextView.IsValid)
{
// We can not get the visual. Return TS_R_NOLAYOUT to the caller.
throw new COMException(SR.Get(SRID.TextStore_TS_E_NOLAYOUT), UnsafeNativeMethods.TS_E_NOLAYOUT);
}
if (startIndex == endIndex)
{
Rect rectStart = startPointer.GetCharacterRect(LogicalDirection.Forward);
milPointTopLeft = rectStart.TopLeft;
milPointBottomRight = rectStart.BottomRight;
}
else
{
Rect rectBound = new Rect(Size.Empty);
ITextPointer navigator = startPointer.CreatePointer();
endPointer = CreatePointerAtCharOffset(endIndex, LogicalDirection.Backward);
endPointer.MoveToInsertionPosition(LogicalDirection.Backward);
bool moved;
do
{
// Compute the textSegment bounds line by line.
TextSegment lineRange = this.TextView.GetLineRange(navigator);
ITextPointer end;
Rect lineRect;
// Skip any BlockUIContainer or any other content that is not treated as a line by TextView.
if (!lineRange.IsNull)
{
ITextPointer start = (lineRange.Start.CompareTo(startPointer) <= 0) ? startPointer : lineRange.Start;
end = (lineRange.End.CompareTo(endPointer) >= 0) ? endPointer : lineRange.End;
lineRect = GetLineBounds(start, end);
moved = (navigator.MoveToLineBoundary(1) != 0) ? true : false;
}
else
{
lineRect = navigator.GetCharacterRect(LogicalDirection.Forward);
moved = navigator.MoveToNextInsertionPosition(LogicalDirection.Forward);
end = navigator;
}
if (lineRect.IsEmpty == false)
{
rectBound.Union(lineRect);
}
if (end.CompareTo(endPointer) == 0)
{
break;
}
}
while (moved);
// Invariant.Assert(rectBound.IsEmpty == false);
milPointTopLeft = rectBound.TopLeft;
milPointBottomRight = rectBound.BottomRight;
}
// Transform to root visual coordinates.
transform = UiScope.TransformToAncestor(compositionTarget.RootVisual);
//
transform.TryTransform(milPointTopLeft, out milPointTopLeft);
transform.TryTransform(milPointBottomRight, out milPointBottomRight);
rect = TransformRootRectToScreenCoordinates(milPointTopLeft, milPointBottomRight, win32Window, source);
}
private static UnsafeNativeMethods.RECT TransformRootRectToScreenCoordinates(Point milPointTopLeft, Point milPointBottomRight, IWin32Window win32Window, PresentationSource source)
{
UnsafeNativeMethods.RECT rect;
NativeMethods.POINT clientPoint;
CompositionTarget compositionTarget;
rect = new UnsafeNativeMethods.RECT();
// Transform to device units.
compositionTarget = source.CompositionTarget;
milPointTopLeft = compositionTarget.TransformToDevice.Transform(milPointTopLeft);
milPointBottomRight = compositionTarget.TransformToDevice.Transform(milPointBottomRight);
IntPtr hwnd = IntPtr.Zero;
new UIPermission(UIPermissionWindow.AllWindows).Assert(); // BlessedAssert
try
{
hwnd = win32Window.Handle;
}
finally
{
CodeAccessPermission.RevertAssert();
}
// Transform to screen coords.
clientPoint = new NativeMethods.POINT();
UnsafeNativeMethods.ClientToScreen(new HandleRef(null, hwnd), /* ref by interop */ clientPoint);
rect.left = (int)(clientPoint.x + milPointTopLeft.X);
rect.right = (int)(clientPoint.x + milPointBottomRight.X);
rect.top = (int)(clientPoint.y + milPointTopLeft.Y);
rect.bottom = (int)(clientPoint.y + milPointBottomRight.Y);
return rect;
}
public void GetTextExt(int start, int end, out UnsafeNativeMethods.RECT rect, out bool clipped)
{
rect = new UnsafeNativeMethods.RECT();
clipped = false;
}
public void GetScreenExt(out UnsafeNativeMethods.RECT rect)
{
rect = new UnsafeNativeMethods.RECT();
}
void UnsafeNativeMethods.ITextStoreACP.GetTextExt(int viewCookie, int startIndex, int endIndex, out UnsafeNativeMethods.RECT rect, out bool clipped)
{
PresentationSource source;
IWin32Window win32Window;
CompositionTarget compositionTarget;
ITextView view;
ITextPointer startPointer;
ITextPointer endPointer;
GeneralTransform transform;
Point milPointTopLeft;
Point milPointBottomRight;
// We need to update the layout before getting rect. It could be dirty by SetText call of TIP.
UiScope.UpdateLayout();
rect = new UnsafeNativeMethods.RECT();
clipped = false;
GetVisualInfo(out source, out win32Window, out view);
compositionTarget = source.CompositionTarget;
// We use local coordinates.
startPointer = CreatePointerAtCharOffset(startIndex, LogicalDirection.Forward);
startPointer.MoveToInsertionPosition(LogicalDirection.Forward);
if (!this.TextView.IsValid)
{
// We can not get the visual. Return TS_R_NOLAYOUT to the caller.
throw new COMException(SR.Get(SRID.TextStore_TS_E_NOLAYOUT), UnsafeNativeMethods.TS_E_NOLAYOUT);
}
if (startIndex == endIndex)
{
Rect rectStart = startPointer.GetCharacterRect(LogicalDirection.Forward);
milPointTopLeft = rectStart.TopLeft;
milPointBottomRight = rectStart.BottomRight;
}
else
{
Rect rectBound = new Rect(Size.Empty);
ITextPointer navigator = startPointer.CreatePointer();
endPointer = CreatePointerAtCharOffset(endIndex, LogicalDirection.Backward);
endPointer.MoveToInsertionPosition(LogicalDirection.Backward);
bool moved;
do
{
// Compute the textSegment bounds line by line.
TextSegment lineRange = this.TextView.GetLineRange(navigator);
ITextPointer end;
Rect lineRect;
// Skip any BlockUIContainer or any other content that is not treated as a line by TextView.
if (!lineRange.IsNull)
{
ITextPointer start = (lineRange.Start.CompareTo(startPointer) <= 0) ? startPointer : lineRange.Start;
end = (lineRange.End.CompareTo(endPointer) >= 0) ? endPointer : lineRange.End;
lineRect = GetLineBounds(start, end);
moved = (navigator.MoveToLineBoundary(1) != 0) ? true : false;
}
else
{
lineRect = navigator.GetCharacterRect(LogicalDirection.Forward);
moved = navigator.MoveToNextInsertionPosition(LogicalDirection.Forward);
end = navigator;
}
if (lineRect.IsEmpty == false)
{
rectBound.Union(lineRect);
}
if (end.CompareTo(endPointer) == 0)
{
break;
}
}
while (moved);
// Invariant.Assert(rectBound.IsEmpty == false);
milPointTopLeft = rectBound.TopLeft;
milPointBottomRight = rectBound.BottomRight;
}
// Transform to root visual coordinates.
transform = UiScope.TransformToAncestor(compositionTarget.RootVisual);
//
transform.TryTransform(milPointTopLeft, out milPointTopLeft);
transform.TryTransform(milPointBottomRight, out milPointBottomRight);
rect = TransformRootRectToScreenCoordinates(milPointTopLeft, milPointBottomRight, win32Window, source);
}
