public LineTransform GetLineTransform(ITextViewLine line, double yPosition, Microsoft.VisualStudio.Text.Editor.ViewRelativePosition placement)
{
string lineText = line.Extent.GetText().Trim();
if (lineText == "{" || lineText == "}" || lineText == "};")
{
return(new LineTransform(BraceLineScale));
}
else
{
return(line.DefaultLineTransform);
}
}
public override VSTF.LineTransform GetLineTransform(HexViewLine line, double yPosition, VSTE.ViewRelativePosition placement)
{
var transform = removeExtraTextLineVerticalPixels ?
new VSTF.LineTransform(0, 0, line.DefaultLineTransform.VerticalScale, line.DefaultLineTransform.Right) :
line.DefaultLineTransform;
foreach (var source in lineTransformSources)
{
transform = VSTF.LineTransform.Combine(transform, source.GetLineTransform(line, yPosition, placement));
}
return(transform);
}
/// <summary> /// Calculates the line transform for a given line of formatted text /// </summary> /// <param name="line">Line</param> /// <param name="yPosition">Y position</param> /// <param name="placement">Placement</param> /// <returns></returns> public abstract VSTF.LineTransform GetLineTransform(HexViewLine line, double yPosition, VSTE.ViewRelativePosition placement);
/// <summary> /// Displays a line in the view /// </summary> /// <param name="bufferPosition">Position</param> /// <param name="verticalDistance">Distance relative to the top or bottom of the view</param> /// <param name="relativeTo">The <see cref="VSTE.ViewRelativePosition"/></param> /// <param name="viewportWidthOverride">Overrides viewport width</param> /// <param name="viewportHeightOverride">Overrides viewport height</param> /// <param name="options">Options</param> public abstract void DisplayHexLineContainingBufferPosition(HexBufferPoint bufferPosition, double verticalDistance, VSTE.ViewRelativePosition relativeTo, double?viewportWidthOverride, double?viewportHeightOverride, DisplayHexLineOptions options);
/// <summary> /// Displays a line in the view /// </summary> /// <param name="bufferPosition">Position</param> /// <param name="verticalDistance">Distance relative to the top or bottom of the view</param> /// <param name="relativeTo">The <see cref="VSTE.ViewRelativePosition"/></param> /// <param name="viewportWidthOverride">Overrides viewport width</param> /// <param name="viewportHeightOverride">Overrides viewport height</param> public void DisplayHexLineContainingBufferPosition(HexBufferPoint bufferPosition, double verticalDistance, VSTE.ViewRelativePosition relativeTo, double?viewportWidthOverride, double?viewportHeightOverride) => DisplayHexLineContainingBufferPosition(bufferPosition, verticalDistance, relativeTo, viewportWidthOverride, viewportHeightOverride, DisplayHexLineOptions.None);
/// <summary> /// Displays a line in the view /// </summary> /// <param name="bufferPosition">Position</param> /// <param name="verticalDistance">Distance relative to the top or bottom of the view</param> /// <param name="relativeTo">The <see cref="VSTE.ViewRelativePosition"/></param> public void DisplayHexLineContainingBufferPosition(HexBufferPoint bufferPosition, double verticalDistance, VSTE.ViewRelativePosition relativeTo) => DisplayHexLineContainingBufferPosition(bufferPosition, verticalDistance, relativeTo, null, null, DisplayHexLineOptions.None);
HexFormattedLine AddLineTransform(HexFormattedLine line, double yPosition, VSTE.ViewRelativePosition placement)
{
if (line != null)
{
var lineTransform = lineTransformProvider.GetLineTransform(line, yPosition, placement);
if (lineTransform != line.LineTransform)
{
line.SetLineTransform(lineTransform);
line.SetChange(VSTF.TextViewLineChange.NewOrReformatted);
}
}
return(line);
}
List <LineInfo> CreateLineInfos(HexBufferPoint bufferPosition, VSTE.ViewRelativePosition relativeTo, double verticalDistance, double viewportHeightOverride)
{
var lineInfos = new List <LineInfo>();
var startLine = GetLine(bufferPosition);
double newViewportBottom = NewViewportTop + viewportHeightOverride;
double lineStartY;
if (relativeTo == VSTE.ViewRelativePosition.Top)
{
lineStartY = NewViewportTop + verticalDistance;
AddLineTransform(startLine, lineStartY, VSTE.ViewRelativePosition.Top);
}
else
{
Debug.Assert(relativeTo == VSTE.ViewRelativePosition.Bottom);
lineStartY = NewViewportTop + viewportHeightOverride - verticalDistance;
AddLineTransform(startLine, lineStartY, VSTE.ViewRelativePosition.Bottom);
lineStartY -= startLine.Height;
}
var currentLine = startLine;
double y = lineStartY;
if (y + currentLine.Height > NewViewportTop)
{
for (;;)
{
lineInfos.Add(new LineInfo(currentLine, y));
if (y <= NewViewportTop)
{
break;
}
currentLine = AddLineTransform(GetLineBefore(currentLine), y, VSTE.ViewRelativePosition.Bottom);
if (currentLine == null)
{
break;
}
y -= currentLine.Height;
}
lineInfos.Reverse();
}
currentLine = startLine;
for (y = lineStartY + currentLine.Height; y < newViewportBottom;)
{
currentLine = AddLineTransform(GetLineAfter(currentLine), y, VSTE.ViewRelativePosition.Top);
if (currentLine == null)
{
break;
}
lineInfos.Add(new LineInfo(currentLine, y));
y += currentLine.Height;
}
Debug.Assert(new HashSet <WpfHexViewLine>(lineInfos.Select(a => a.Line)).Count == lineInfos.Count);
// At least one line must be included
if (lineInfos.Count == 0)
{
lineInfos.Add(new LineInfo(startLine, NewViewportTop));
}
// Make sure that at least one line is shown
var last = lineInfos[lineInfos.Count - 1];
if (last.Y + last.Line.Height <= NewViewportTop)
{
NewViewportTop = last.Y;
}
var first = lineInfos[0];
if (first.Y >= newViewportBottom)
{
NewViewportTop = first.Y;
}
return(lineInfos);
}
public void LayoutLines(HexBufferPoint bufferPosition, VSTE.ViewRelativePosition relativeTo, double verticalDistance, double viewportLeft, double viewportWidthOverride, double viewportHeightOverride)
{
NewViewportTop = requestedViewportTop;
var infos = CreateLineInfos(bufferPosition, relativeTo, verticalDistance, viewportHeightOverride);
// The first line of the file must always be shown at the top of the view
if (infos[0].Y > NewViewportTop)
{
infos = CreateLineInfos(bufferLines.BufferSpan.Start, VSTE.ViewRelativePosition.Top, 0, viewportHeightOverride);
Debug.Assert(infos[0].Y == NewViewportTop);
}
// Include a hidden line before the first line and one after the last line,
// just like in VS' WpfHexViewLine collection.
var firstInfo = infos[0];
var prevLine = AddLineTransform(GetLineBefore(firstInfo.Line), firstInfo.Y, VSTE.ViewRelativePosition.Bottom);
if (prevLine != null)
{
infos.Insert(0, new LineInfo(prevLine, firstInfo.Y - prevLine.Height));
}
var lastInfo = infos[infos.Count - 1];
var nextLine = AddLineTransform(GetLineAfter(lastInfo.Line), lastInfo.Y + lastInfo.Line.Height, VSTE.ViewRelativePosition.Top);
if (nextLine != null)
{
infos.Add(new LineInfo(nextLine, lastInfo.Y + lastInfo.Line.Height));
}
var keptLines = new HashSet <PhysicalLine>();
foreach (var info in infos)
{
keptLines.Add(toPhysicalLine[info.Line]);
}
foreach (var physLine in toPhysicalLine.Values)
{
if (!keptLines.Contains(physLine))
{
physLine.Dispose();
}
}
var newTop = GetNewViewportTop(infos, NewViewportTop);
var delta = -NewViewportTop + newTop;
NewViewportTop = newTop;
var visibleLines = new HashSet <WpfHexViewLine>();
var visibleArea = new Rect(viewportLeft, NewViewportTop, viewportWidthOverride, viewportHeightOverride);
NewOrReformattedLines = new List <WpfHexViewLine>();
TranslatedLines = new List <WpfHexViewLine>();
AllVisibleLines = new List <WpfHexViewLine>();
foreach (var info in infos)
{
var line = info.Line;
visibleLines.Add(line);
AllVisibleLines.Add(line);
double newLineTop = delta + info.Y;
if (!oldVisibleLines.Contains(line))
{
line.SetChange(VSTF.TextViewLineChange.NewOrReformatted);
line.SetDeltaY(0);
}
else
{
var deltaY = newLineTop - line.Top;
line.SetDeltaY(deltaY);
// If it got a new line transform, it will have Change == NewOrReformatted,
// and that change has priority over Translated.
if (deltaY != 0 && line.Change == VSTF.TextViewLineChange.None)
{
line.SetChange(VSTF.TextViewLineChange.Translated);
}
}
line.SetTop(newLineTop);
line.SetVisibleArea(visibleArea);
if (line.Change == VSTF.TextViewLineChange.Translated)
{
TranslatedLines.Add(line);
}
else if (line.Change == VSTF.TextViewLineChange.NewOrReformatted)
{
NewOrReformattedLines.Add(line);
}
}
bool foundVisibleLine = false;
foreach (var info in infos)
{
if (visibleLines.Contains(info.Line))
{
foundVisibleLine = true;
continue;
}
info.Line.SetChange(VSTF.TextViewLineChange.None);
info.Line.SetDeltaY(0);
info.Line.SetTop(foundVisibleLine ? double.PositiveInfinity : double.NegativeInfinity);
info.Line.SetVisibleArea(visibleArea);
}
Debug.Assert(NewOrReformattedLines.Count + TranslatedLines.Count <= AllVisibleLines.Count);
Debug.Assert(AllVisibleLines.Count >= 1);
if (AllVisibleLines.Count == 0)
{
throw new InvalidOperationException();
}
AllVisiblePhysicalLines = new List <PhysicalLine>(keptLines);
}
void VSTE.ITextView.DisplayTextLineContainingBufferPosition(VST.SnapshotPoint bufferPosition, double verticalDistance, VSTE.ViewRelativePosition relativeTo, double?viewportWidthOverride, double?viewportHeightOverride)
{
throw new NotImplementedException();
}
