/// <summary>
/// New instance
/// </summary>
/// <param name="handler">Handler for this highlight adorner.</param>
/// <param name="bodyHighlight">The corresponding highlight adorner in the body of the text.</param>
public ScrollBarHighlightAdorner(ScrollBarHighlightHandler handler, HighlightAdorner bodyHighlight)
: base(handler.ScrollViewer)
{
this.bodyHighlight = bodyHighlight;
this.handler = handler;
IsHitTestVisible = false;
}
/// <summary>
/// New instance
/// </summary>
public Highlight(int start, int end, HighlightAdorner adorner, System.Windows.Documents.Run run, int runStartIndex)
{
this.adorner = adorner;
this.s = start;
this.e = end;
this.run = run;
this.runStartIndex = runStartIndex;
}
/// <summary>
/// Removes an adorner when it is no longer used.
/// </summary>
/// <param name="adorner"></param>
public virtual void RemoveAdorner(HighlightAdorner adorner)
{
if (adorner != null && AdornerLayer != null)
{
AdornerLayer.Remove(adorner);
adorner.Unregister();
adorner.RenderImpossible -= new EventHandler(adorner_RenderImpossible);
}
}
/// <summary>
/// Creates an adorner of type ScrollBarHighlightAdorner.
/// </summary>
/// <param name="highlightAdorner"></param>
/// <returns></returns>
public ScrollBarHighlightAdorner CreateScrollBarHighlightAdorner(HighlightAdorner highlightAdorner)
{
if (!IsUsable)
{
return(null);
}
else
{
return(new ScrollBarHighlightAdorner(this, highlightAdorner));
}
}
/// <summary>
/// Whether the Y coordinate in the argument is visible in the scroll viewer's viewport.
/// </summary>
public bool IsHighlightInViewPort(HighlightAdorner bodyHighlight)
{
if (scrollViewerIsChild)
{
return(bodyHighlight.IsInViewport);
}
else
{
return(bodyHighlight.Y >= scrollViewer.ContentVerticalOffset && bodyHighlight.Y <= scrollViewer.ContentVerticalOffset + scrollViewer.ViewportHeight);
}
}
/// <summary>
/// Gets the position of <c>bodyHighlight</c>.
/// </summary>
public Rect GetAdornerPosition(HighlightAdorner bodyHighlight)
{
double y = bodyHighlight.Y + (scrollViewerIsChild ? scrollViewer.VerticalOffset : 0);
return(new Rect(scrollViewer.ActualWidth - track.ActualWidth, scrollButtonSize + ((y / scrollViewer.ExtentHeight) * track.ActualHeight), track.ActualWidth, 3));
}
/// <summary>
/// New instance.
/// </summary>
/// <param name="start">Where the highlight starts in <c>run</c></param>
/// <param name="end">Where the highlight ends in <c>run</c></param>
/// <param name="adorner">Adorner instance that will actually highlight</param>
/// <param name="run">The Run where the highlight is</param>
public TextBoxHighlight(int start, int end, HighlightAdorner adorner, System.Windows.Documents.Run run)
: base(start, end, adorner, run)
{
}
/// <summary>
/// New instance.
/// </summary>
/// <param name="start">Where the highlight starts in <c>run</c></param>
/// <param name="end">Where the highlight ends in <c>run</c></param>
/// <param name="adorner">Adorner instance that will actually highlight</param>
/// <param name="run">The Run where the highlight is</param>
public FlowDocumentScrollViewerHighlight(int start, int end, HighlightAdorner adorner, System.Windows.Documents.Run run)
: base(start, end, adorner, run)
{
}
/// <summary>
/// New instance, with Run relative to zero index (ie no other Runs in container).
/// </summary>
public Highlight(int start, int end, HighlightAdorner adorner, System.Windows.Documents.Run run) : this(start, end, adorner, run, 0)
{
}
/// <summary>
/// New instance.
/// </summary>
/// <param name="start">Where the highlight starts in <c>run</c></param>
/// <param name="end">Where the highlight ends in <c>run</c></param>
/// <param name="adorner">Adorner instance that will actually highlight</param>
/// <param name="run">The Run where the highlight is</param>
/// <param name="runStartIndex">The character index of the run in the RichTextBox's Document.</param>
public RichTextBoxHighlight(int start, int end, HighlightAdorner adorner, System.Windows.Documents.Run run, int runStartIndex) : base(start, end, adorner, run)
{
this.runStartIndex = runStartIndex;
}
/// <summary>
/// Overrides should call RegisterHighlight to ensure proper registration of the Highlight.
/// </summary>
public virtual void AddHighlight(Run run, int index, int length)
{
HighlightAdorner adorner = new HighlightAdorner(uiElementToHighlight, run, index, length, scrollBarHighlightHandler.HorizontalScrollBarHeight, BodyHighlightAdornerBrush, BodyHighlightAdornerPen, BodyIterativeHighlightAdornerBrush, BodyIterativeHighlightAdornerPen);
RegisterHighlight(new Highlight(index, index + length, adorner, run));
}
// A common way to implement an adorner's rendering behavior is to override the OnRender
// method, which is called by the layout system as part of a rendering pass.
/// <summary>
/// Paints the highlight.
/// </summary>
protected override void OnRender(DrawingContext drawingContext)
{
//// Some arbitrary drawing implements.
/* this is a nice shortcut but it means we can't set yPos, which is used by scroll highlighter
* int firstline = tb.GetFirstVisibleLineIndex();
* if (firstline == -1) { OnRenderImpossible(); return; }
* int lastline = tb.GetLastVisibleLineIndex();
* if (lastline == -1) { OnRenderImpossible(); return; }
* try
* {
* int charline = tb.GetLineIndexFromCharacterIndex(start);
* if (charline == -1) { OnRenderImpossible(); return; }
* if (charline < firstline - 1 || charline > lastline + 1) return;
* }
* catch (ArgumentOutOfRangeException) { OnRenderImpossible(); return; }
*/
//drawingContext.PushClip(new RectangleGeometry(new Rect(0, 0, this.AdornedElement.RenderSize.Width, this.AdornedElement.RenderSize.Height)));
var leftRectangle = tb.GetRectFromCharacterIndex(start);
var rightRectangle = tb.GetRectFromCharacterIndex(start + length);
if (Double.IsInfinity(leftRectangle.X))
{
OnRenderImpossible();
}
yPos = leftRectangle.Top;
AdjustRectanglesToView(ref leftRectangle, ref rightRectangle, this.AdornedElement.RenderSize.Height - horizontalScrollBarHeight);
// AdjustRectanglesToView(ref leftRectangle, ref rightRectangle, AdornedElement.RenderSize.Height - SystemParameters.ScrollHeight);
if (leftRectangle.Top > 1 && rightRectangle.Y > 1 && leftRectangle.Top < (AdornedElement.RenderSize.Height - horizontalScrollBarHeight) &&
leftRectangle.Left > 1 && rightRectangle.Right > 1 && leftRectangle.Left < (AdornedElement.RenderSize.Width - horizontalScrollBarHeight) //assume vertical scrollbar is as wide as horiz scroll is high
)
{
if (rightRectangle.Left > AdornedElement.RenderSize.Width - horizontalScrollBarHeight - 1)//if it ends to the right
{
rightRectangle.X = AdornedElement.RenderSize.Width - horizontalScrollBarHeight - 1;
}
isInViewport = true;
if (RoughlyTheSame(leftRectangle.Top, rightRectangle.Top))
{
//notsplit over more than 1 line
var rect = new Rect(leftRectangle.TopLeft, rightRectangle.BottomRight);
rect.Inflate(1, 1);
drawingContext.DrawRectangle(renderBrush, null, rect);
}
else
{
if (leftRectangle != Rect.Empty && rightRectangle != Rect.Empty)
{
//paint as 3 rects
//r1 is top line from word to end of line
//r2 is start of line to end of line, between first line and last line
//r3 is last line from start of line to end of word
//we need to figure out the X coords of the start of the line and end of the line
Rect[] points = FindStartEndOfVisualLineRects(start, leftRectangle);
HighlightAdorner.DrawMultiLine(drawingContext, renderBrush, renderPen, ref leftRectangle, ref rightRectangle, points);
}
}
}
else
{
isInViewport = false;
}
//drawingContext.Pop();
}