public override void EnsureSpanVisible(HexLineSpan lineSpan, VSTE.EnsureSpanVisibleOptions options) {
if (lineSpan.IsDefault)
throw new ArgumentException();
if (lineSpan.BufferSpan.Buffer != hexView.Buffer)
throw new ArgumentException();
EnsureSpanVisibleCore(lineSpan, options);
}
public override void EnsureSpanVisible(HexBufferLine line, VST.Span span, VSTE.EnsureSpanVisibleOptions options) {
if (line == null)
throw new ArgumentNullException(nameof(line));
if (line.Buffer != hexView.Buffer)
throw new ArgumentException();
EnsureSpanVisibleCore(new HexLineSpan(line, span), options);
}
void EnsureSpanVisibleX(HexLineSpan lineSpan, VSTE.EnsureSpanVisibleOptions options) {
var span = lineSpan.BufferSpan;
if (hexView.ViewportWidth == 0)
return;
var lines = hexView.HexViewLines.GetHexViewLinesIntersectingSpan(span);
if (lines.Count == 0)
return;
var ispan = span.Intersection(hexView.HexViewLines.FormattedSpan);
if (ispan == null)
return;
span = ispan.Value;
double left = double.PositiveInfinity, right = double.NegativeInfinity;
for (int i = 0; i < lines.Count; i++) {
var line = lines[i];
var intersection = line.BufferSpan.Intersection(span);
if (intersection == null)
continue;
var bounds = lineSpan.IsTextSpan ?
line.GetNormalizedTextBounds(lineSpan.TextSpan.Value) :
line.GetNormalizedTextBounds(intersection.Value, lineSpan.SelectionFlags.Value);
foreach (var b in bounds) {
if (left > b.Left)
left = b.Left;
if (right < b.Right)
right = b.Right;
}
}
if (double.IsInfinity(left) || double.IsInfinity(right))
return;
Debug.Assert(left <= right);
if (left > right)
right = left;
double width = right - left;
double availWidth = Math.Max(0, hexView.ViewportWidth - width);
double extraScroll;
const double EXTRA_WIDTH = 4;
if (availWidth >= EXTRA_WIDTH)
extraScroll = EXTRA_WIDTH;
else
extraScroll = availWidth / 2;
if (hexView.ViewportLeft <= right && right <= hexView.ViewportRight) {
}
else if (right > hexView.ViewportRight)
hexView.ViewportLeft = right + extraScroll - hexView.ViewportWidth;
else {
var newLeft = left - extraScroll;
if (newLeft + hexView.ViewportWidth < right)
newLeft = right - hexView.ViewportWidth;
hexView.ViewportLeft = newLeft;
}
}
void EnsureSpanVisibleCore(HexLineSpan lineSpan, VSTE.EnsureSpanVisibleOptions options) {
if (lineSpan.BufferSpan.Buffer != hexView.Buffer)
throw new ArgumentException();
if ((hexView.HexViewLines?.Count ?? 0) == 0)
return;
EnsureSpanVisibleY(lineSpan.BufferSpan, options);
EnsureSpanVisibleX(lineSpan, options);
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="adornment">Adornment element</param>
/// <param name="removalCallback">Called when the adornment is removed, may be null</param>
/// <param name="topSpace">Top space or null to use the default value</param>
/// <param name="baseline">Base line or null to use the default value</param>
/// <param name="textHeight">Text height or null to use the default value</param>
/// <param name="bottomSpace">Bottom space or null to use the default value</param>
/// <param name="affinity">Position affinity or null to use the default value</param>
public HexIntraTextAdornmentTag(UIElement adornment, VSTE.AdornmentRemovedCallback removalCallback, double? topSpace, double? baseline, double? textHeight, double? bottomSpace, VST.PositionAffinity? affinity) {
if (adornment == null)
throw new ArgumentNullException(nameof(adornment));
Adornment = adornment;
RemovalCallback = removalCallback;
TopSpace = topSpace;
Baseline = baseline;
TextHeight = textHeight;
BottomSpace = bottomSpace;
Affinity = affinity;
}
public override void EnsureSpanVisible(HexBufferSpan span, HexSpanSelectionFlags flags, VSTE.EnsureSpanVisibleOptions options) {
if (span.Buffer != hexView.Buffer)
throw new ArgumentException();
EnsureSpanVisibleCore(new HexLineSpan(span, flags), options);
}
/// <summary> /// Scrolls the viewport one page up or down /// </summary> /// <param name="direction">Direction</param> /// <returns></returns> public abstract bool ScrollViewportVerticallyByPage(VSTE.ScrollDirection direction);
public override bool ScrollViewportVerticallyByPage(VSTE.ScrollDirection direction) {
bool hasFullyVisibleLines = hexView.HexViewLines.Any(a => a.VisibilityState == VSTF.VisibilityState.FullyVisible);
if (direction == VSTE.ScrollDirection.Up) {
var firstVisibleLine = hexView.HexViewLines.FirstVisibleLine;
if (firstVisibleLine.Height > hexView.ViewportHeight) {
ScrollViewportVerticallyByPixels(hexView.ViewportHeight);
return hasFullyVisibleLines;
}
double top;
if (firstVisibleLine.VisibilityState == VSTF.VisibilityState.FullyVisible) {
if (firstVisibleLine.IsFirstDocumentLine())
return hasFullyVisibleLines;
top = firstVisibleLine.Top;
}
else
top = firstVisibleLine.Bottom; // Top of next line, which is possibly not in HexViewLines so we can't use its Top prop
var line = firstVisibleLine;
// Top is only valid if the line is in HexViewLines, so use this variable to track the correct line top value
double lineTop = line.Top;
var prevLine = line;
// Cache this since prevLine could've been disposed when we need to access this property
var prevLineStart = prevLine.BufferStart;
while (lineTop + hexView.ViewportHeight >= top) {
prevLine = line;
prevLineStart = prevLine.BufferStart;
if (line.IsFirstDocumentLine())
break;
line = hexView.GetHexViewLineContainingBufferPosition(line.BufferStart - 1);
if (line.VisibilityState == VSTF.VisibilityState.Unattached) {
// Height is only fully initialized once it's been shown on the screen
// (its LineTransform property is used to calculate Height)
var lineStart = line.BufferStart;
hexView.DisplayHexLineContainingBufferPosition(lineStart, 0, VSTE.ViewRelativePosition.Bottom);
line = hexView.GetHexViewLineContainingBufferPosition(lineStart);
Debug.Assert(line.VisibilityState != VSTF.VisibilityState.Unattached);
}
lineTop -= line.Height;
}
hexView.DisplayHexLineContainingBufferPosition(prevLineStart, 0, VSTE.ViewRelativePosition.Top);
}
else {
Debug.Assert(direction == VSTE.ScrollDirection.Down);
double pixels = hexView.ViewportHeight;
var lastVisibleLine = hexView.HexViewLines.LastVisibleLine;
if (lastVisibleLine.Height > hexView.ViewportHeight) {
// This line intentionally left blank
}
else if (lastVisibleLine.VisibilityState == VSTF.VisibilityState.FullyVisible) {
if (lastVisibleLine.IsLastDocumentLine()) {
hexView.DisplayHexLineContainingBufferPosition(lastVisibleLine.BufferStart, 0, VSTE.ViewRelativePosition.Top);
return hasFullyVisibleLines;
}
}
else
pixels -= hexView.ViewportBottom - lastVisibleLine.Top;
ScrollViewportVerticallyByPixels(-pixels);
}
return hasFullyVisibleLines;
}
public override void ScrollViewportVerticallyByLines(VSTE.ScrollDirection direction, int count) {
if (count < 0)
throw new ArgumentOutOfRangeException(nameof(count));
if (direction == VSTE.ScrollDirection.Up) {
double pixels = 0;
var line = hexView.HexViewLines.FirstVisibleLine;
for (int i = 0; i < count; i++) {
if (i == 0) {
if (line.VisibilityState == VSTF.VisibilityState.PartiallyVisible)
pixels += hexView.ViewportTop - line.Top;
if (line.BufferStart > hexView.BufferLines.BufferStart) {
line = hexView.GetHexViewLineContainingBufferPosition(line.BufferStart - 1);
pixels += line.Height;
}
}
else {
if (line.VisibilityState == VSTF.VisibilityState.Unattached) {
// Height is only fully initialized once it's been shown on the screen
// (its LineTransform property is used to calculate Height)
var lineStart = line.BufferStart;
hexView.DisplayHexLineContainingBufferPosition(lineStart, 0, VSTE.ViewRelativePosition.Top);
line = hexView.GetHexViewLineContainingBufferPosition(lineStart);
Debug.Assert(line.VisibilityState != VSTF.VisibilityState.Unattached);
pixels = 0;
}
else
pixels += line.Height;
}
if (line.BufferStart <= hexView.BufferLines.BufferStart)
break;
line = hexView.GetHexViewLineContainingBufferPosition(line.BufferStart - 1);
}
if (pixels != 0)
ScrollViewportVerticallyByPixels(pixels);
}
else {
Debug.Assert(direction == VSTE.ScrollDirection.Down);
double pixels = 0;
var line = hexView.HexViewLines.FirstVisibleLine;
for (int i = 0; i < count; i++) {
if (line.IsLastDocumentLine())
break;
if (i == 0) {
if (line.VisibilityState == VSTF.VisibilityState.FullyVisible)
pixels += line.Height;
else {
pixels += line.Bottom - hexView.ViewportTop;
line = hexView.GetHexViewLineContainingBufferPosition(line.BufferEnd);
pixels += line.Height;
}
}
else {
if (line.VisibilityState == VSTF.VisibilityState.Unattached) {
// Height is only fully initialized once it's been shown on the screen
// (its LineTransform property is used to calculate Height)
var lineStart = line.BufferStart;
hexView.DisplayHexLineContainingBufferPosition(lineStart, 0, VSTE.ViewRelativePosition.Top);
line = hexView.GetHexViewLineContainingBufferPosition(lineStart);
Debug.Assert(line.VisibilityState != VSTF.VisibilityState.Unattached);
pixels = 0;
}
else
pixels += line.Height;
}
if (line.IsLastDocumentLine())
break;
line = hexView.GetHexViewLineContainingBufferPosition(line.BufferEnd);
}
if (pixels != 0)
ScrollViewportVerticallyByPixels(-pixels);
}
}
void ShowSpan(HexBufferSpan bufferSpan, VSTE.EnsureSpanVisibleOptions options) {
if ((options & VSTE.EnsureSpanVisibleOptions.ShowStart) != 0)
hexView.DisplayHexLineContainingBufferPosition(bufferSpan.Start, 0, VSTE.ViewRelativePosition.Top);
else {
var end = bufferSpan.End;
if (end > hexView.BufferLines.BufferStart)
end = end - 1;
hexView.DisplayHexLineContainingBufferPosition(end, 0, VSTE.ViewRelativePosition.Bottom);
}
}
void EnsureSpanVisibleY(HexBufferSpan span, VSTE.EnsureSpanVisibleOptions options) {
bool showStart = (options & VSTE.EnsureSpanVisibleOptions.ShowStart) != 0;
bool minimumScroll = (options & VSTE.EnsureSpanVisibleOptions.MinimumScroll) != 0;
bool alwaysCenter = (options & VSTE.EnsureSpanVisibleOptions.AlwaysCenter) != 0;
var visibleSpan = VisibleSpan;
bool spanIsInView = span.Start >= visibleSpan.Start && span.End <= visibleSpan.End;
if (!spanIsInView) {
ShowSpan(span, options);
alwaysCenter = true;
visibleSpan = VisibleSpan;
spanIsInView = span.Start >= visibleSpan.Start && span.End <= visibleSpan.End;
}
if (spanIsInView) {
var lines = hexView.HexViewLines.GetHexViewLinesIntersectingSpan(span);
Debug.Assert(lines.Count > 0);
if (lines.Count == 0)
return;
var first = lines[0];
var last = lines[lines.Count - 1];
if (lines.Count > 1 && last.BufferStart == span.End)
last = lines[lines.Count - 2];
var firstSpan = first.BufferSpan;
var lastSpan = last.BufferSpan;
bool allLinesFullyVisible = first.VisibilityState == VSTF.VisibilityState.FullyVisible && last.VisibilityState == VSTF.VisibilityState.FullyVisible;
if (alwaysCenter || (!allLinesFullyVisible && !minimumScroll)) {
double height = last.Bottom - first.Top;
double verticalDistance = (hexView.ViewportHeight - height) / 2;
hexView.DisplayHexLineContainingBufferPosition(first.BufferStart, verticalDistance, VSTE.ViewRelativePosition.Top);
return;
}
if (first.VisibilityState != VSTF.VisibilityState.FullyVisible)
hexView.DisplayHexLineContainingBufferPosition(first.BufferStart, 0, VSTE.ViewRelativePosition.Top);
else if (last.VisibilityState != VSTF.VisibilityState.FullyVisible)
hexView.DisplayHexLineContainingBufferPosition(last.BufferStart, 0, VSTE.ViewRelativePosition.Bottom);
if (showStart) {
var line = hexView.HexViewLines.GetHexViewLineContainingBufferPosition(firstSpan.Start);
if (line == null || line.VisibilityState != VSTF.VisibilityState.FullyVisible)
ShowSpan(span, options);
}
else {
var line = hexView.HexViewLines.GetHexViewLineContainingBufferPosition(lastSpan.Start);
if (line == null || line.VisibilityState != VSTF.VisibilityState.FullyVisible)
ShowSpan(span, options);
}
}
}
/// <summary> /// Scrolls the viewport by lines /// </summary> /// <param name="direction">Direction</param> /// <param name="count">Number of lines to scroll</param> public abstract void ScrollViewportVerticallyByLines(VSTE.ScrollDirection direction, int count);
/// <summary>
/// Constructor
/// </summary>
/// <param name="adornment">Adornment element</param>
/// <param name="removalCallback">Called when the adornment is removed, may be null</param>
public HexIntraTextAdornmentTag(UIElement adornment, VSTE.AdornmentRemovedCallback removalCallback)
: this(adornment, removalCallback, null, null, null, null, null) {
}
/// <summary> /// Scrolls the viewport one line up or down /// </summary> /// <param name="direction">Direction</param> public void ScrollViewportVerticallyByLine(VSTE.ScrollDirection direction) => ScrollViewportVerticallyByLines(direction, 1);
/// <summary> /// Scrolls a line into view /// </summary> /// <param name="line">Line</param> /// <param name="span">Line span</param> /// <param name="options">Options</param> public abstract void EnsureSpanVisible(HexBufferLine line, VST.Span span, VSTE.EnsureSpanVisibleOptions options);
/// <summary> /// Scrolls a span into view /// </summary> /// <param name="span">Span</param> /// <param name="flags">Flags</param> /// <param name="options">Options</param> public abstract void EnsureSpanVisible(HexBufferSpan span, HexSpanSelectionFlags flags, VSTE.EnsureSpanVisibleOptions options);
/// <summary> /// Scrolls a span into view /// </summary> /// <param name="lineSpan">Line span</param> /// <param name="options">Options</param> public abstract void EnsureSpanVisible(HexLineSpan lineSpan, VSTE.EnsureSpanVisibleOptions options);
/// <summary>
/// Constructor
/// </summary>
/// <param name="adornment">Adornment element</param>
/// <param name="removalCallback">Called when the adornment is removed, may be null</param>
/// <param name="affinity">Position affinity or null to use the default value</param>
public HexIntraTextAdornmentTag(UIElement adornment, VSTE.AdornmentRemovedCallback removalCallback, VST.PositionAffinity? affinity)
: this(adornment, removalCallback, null, null, null, null, affinity) {
}
void Options_OptionChanged(object sender, VSTE.EditorOptionChangedEventArgs e) {
if (e.OptionId == DefaultWpfHexViewOptions.UseReducedOpacityForHighContrastOptionName) {
useReducedOpacityForHighContrast = wpfHexView.Options.GetOptionValue(DefaultWpfHexViewOptions.UseReducedOpacityForHighContrastOptionId);
if (themeService.Theme.IsHighContrast)
RefreshExistingMarkers();
}
}
