void DisplayLines(HexBufferPoint bufferPosition, double verticalDistance, VSTE.ViewRelativePosition relativeTo, double viewportWidthOverride, double viewportHeightOverride, DisplayHexLineOptions options, double? newViewportTop) {
if (IsClosed)
throw new InvalidOperationException();
var oldBufferLines = hexBufferLineFormatter;
var oldHexBufferLineFormatterOptions = hexBufferLineFormatterOptions;
Debug.Assert(oldBufferLines != null);
bool raiseBufferLinesChangedEvent = false;
bool revalidateBufferPosition = false;
canvas.Dispatcher.VerifyAccess();
if (bufferPosition.Buffer != Buffer)
throw new ArgumentException();
if (relativeTo != VSTE.ViewRelativePosition.Top && relativeTo != VSTE.ViewRelativePosition.Bottom)
throw new ArgumentOutOfRangeException(nameof(relativeTo));
if (viewportHeightOverride < 0 || double.IsNaN(viewportHeightOverride))
throw new ArgumentOutOfRangeException(nameof(viewportHeightOverride));
if (viewportWidthOverride < 0 || double.IsNaN(viewportWidthOverride))
throw new ArgumentOutOfRangeException(nameof(viewportWidthOverride));
bool invalidateAllLines = false;
if (recreateHexBufferLineFormatter)
invalidateAllLines = true;
if (viewportWidthOverride != lastViewportWidth || viewportWidthOverride != lastFormattedLineSourceViewportWidth) {
invalidateAllLines = true;
lastViewportWidth = viewportWidthOverride;
}
// Make sure the scheduled method doesn't try to call this method
delayLayoutLinesInProgress = false;
if (invalidateAllLines) {
invalidatedRegions.Clear();
invalidatedRegions.Add(new HexBufferSpan(new HexBufferPoint(Buffer, 0), new HexBufferPoint(Buffer, HexPosition.MaxEndPosition)));
}
var regionsToInvalidate = new NormalizedHexBufferSpanCollection(invalidatedRegions);
invalidatedRegions.Clear();
if (invalidatedRegions.Capacity > 100)
invalidatedRegions.TrimExcess();
if (invalidateAllLines || formattedLineSourceIsInvalidated) {
CreateFormattedLineSource(viewportWidthOverride);
formattedLineSourceIsInvalidated = false;
recreateHexBufferLineFormatter = true;
}
// This one depends on FormattedLineSource and must be created afterwards
if (recreateHexBufferLineFormatter) {
recreateHexBufferLineFormatter = false;
raiseBufferLinesChangedEvent = true;
if ((options & DisplayHexLineOptions.CanRecreateBufferLines) != 0) {
// It's safe to invalidate it here since we were called by the dispatcher and
// not by user code.
hexBufferLineFormatter = null;
// Once the new instance gets created, the input bufferPosition could be invalid
// because start and/or end got updated. Re-validate it before creating new lines.
revalidateBufferPosition = true;
}
else {
// Don't re-create it here. That can lead to exceptions if Start/End positions get
// updated and bufferPosition becomes invalid. New BufferLines' IsValidPosition() throws.
// It's recreated with a short delay after raising LayoutChanged.
}
}
var lineTransformProvider = LineTransformProvider;
if (InLayout)
throw new InvalidOperationException();
inLayout = true;
var oldVisibleLines = new HashSet<HexViewLine>(wpfHexViewLineCollection == null ? (IEnumerable<HexViewLine>)Array.Empty<HexViewLine>() : wpfHexViewLineCollection);
wpfHexViewLineCollection?.Invalidate();
var layoutHelper = new LayoutHelper(BufferLines, lineTransformProvider, newViewportTop ?? 0, oldVisibleLines, GetValidCachedLines(regionsToInvalidate), FormattedLineSource);
if (revalidateBufferPosition) {
if (bufferPosition < BufferLines.BufferStart) {
bufferPosition = BufferLines.BufferStart;
relativeTo = VSTE.ViewRelativePosition.Top;
verticalDistance = 0;
}
else if (bufferPosition > BufferLines.BufferEnd) {
bufferPosition = BufferLines.BufferEnd;
relativeTo = VSTE.ViewRelativePosition.Bottom;
verticalDistance = 0;
}
}
layoutHelper.LayoutLines(bufferPosition, relativeTo, verticalDistance, ViewportLeft, viewportWidthOverride, viewportHeightOverride);
visiblePhysicalLines.AddRange(layoutHelper.AllVisiblePhysicalLines);
wpfHexViewLineCollection = new WpfHexViewLineCollectionImpl(this, layoutHelper.AllVisibleLines);
if (!InLayout)
throw new InvalidOperationException();
inLayout = false;
textLayer.AddVisibleLines(layoutHelper.AllVisibleLines);
var newOrReformattedLines = layoutHelper.NewOrReformattedLines.ToArray();
var translatedLines = layoutHelper.TranslatedLines.ToArray();
if (layoutHelper.NewViewportTop != viewportTop) {
viewportTop = layoutHelper.NewViewportTop;
Canvas.SetTop(normalAdornmentLayerCollection, -viewportTop);
}
if ((options & DisplayHexLineOptions.CanRecreateBufferLines) != 0) {
if (raiseBufferLinesChangedEvent)
RaiseBufferLinesChanged(oldBufferLines);
}
else if (raiseBufferLinesChangedEvent && oldBufferLines == hexBufferLineFormatter) {
var newOptions = GetHexBufferLineFormatterOptions();
if (!newOptions.Equals(oldHexBufferLineFormatterOptions)) {
canvas.Dispatcher.BeginInvoke(DispatcherPriority.Send, new Action(() => {
if (oldBufferLines == hexBufferLineFormatter) {
hexBufferLineFormatter = null;
var newBufferLines = BufferLines;
RaiseBufferLinesChanged(oldBufferLines);
var line = wpfHexViewLineCollection.FirstVisibleLine;
verticalDistance = line.Top - ViewportTop;
bufferPosition = line.BufferStart;
if (bufferPosition < BufferLines.BufferStart)
bufferPosition = BufferLines.BufferStart;
else if (bufferPosition > BufferLines.BufferEnd)
bufferPosition = BufferLines.BufferEnd;
DisplayLines(bufferPosition, verticalDistance, VSTE.ViewRelativePosition.Top, ViewportWidth, ViewportHeight, DisplayHexLineOptions.CanRecreateBufferLines, ViewportTop);
}
}));
}
}
// Raise this event after BufferLinesChanged event. BufferLinesChanged is more low level and
// various code could use cached positions in LayoutChanged handlers (eg. the caret will use
// its cached position). If this event is raised afterwards, they have a chance to re-validate
// their cached values.
RaiseLayoutChanged(viewportWidthOverride, viewportHeightOverride, newOrReformattedLines, translatedLines);
}
/// <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);
public override void DisplayHexLineContainingBufferPosition(HexBufferPoint bufferPosition, double verticalDistance, VSTE.ViewRelativePosition relativeTo, double? viewportWidthOverride, double? viewportHeightOverride, DisplayHexLineOptions options) => DisplayLines(bufferPosition, verticalDistance, relativeTo, viewportWidthOverride ?? ViewportWidth, viewportHeightOverride ?? ViewportHeight, options, null);
/// <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);
