public ChatFormatter(Typeface typeface, double fontSize, Brush foreground, IDictionary<string,Brush> palette)
{
_runProperties = new CustomTextRunProperties(typeface, fontSize, foreground, Brushes.Transparent, false);
_paraProperties = new CustomParagraphProperties(_runProperties);
_formatter = TextFormatter.Create(TextFormattingMode.Display);
_palette = palette;
}
internal TextFormatterHost(TextFormatter textFormatter, TextFormattingMode textFormattingMode)
{
if(textFormatter == null)
{
TextFormatter = TextFormatter.FromCurrentDispatcher(textFormattingMode);
}
else
{
TextFormatter = textFormatter;
}
}
public TextLine GetTextForNonPrintableCharacter(string text, ITextRunConstructionContext context)
{
if (nonPrintableCharacterTexts == null)
nonPrintableCharacterTexts = new Dictionary<string, TextLine>();
TextLine textLine;
if (!nonPrintableCharacterTexts.TryGetValue(text, out textLine)) {
var p = new VisualLineElementTextRunProperties(context.GlobalTextRunProperties);
p.SetForegroundBrush(context.TextView.NonPrintableCharacterBrush);
if (formatter == null)
formatter = TextFormatterFactory.Create(context.TextView);
textLine = FormattedTextElement.PrepareText(formatter, text, p);
nonPrintableCharacterTexts[text] = textLine;
}
return textLine;
}
public TextLine GetSimpleLightGrayText(string text, ITextRunConstructionContext context)
{
if (simpleLightGrayTexts == null)
simpleLightGrayTexts = new Dictionary<string, TextLine>();
TextLine textLine;
if (!simpleLightGrayTexts.TryGetValue(text, out textLine)) {
var p = new VisualLineElementTextRunProperties(context.GlobalTextRunProperties);
p.SetForegroundBrush(Brushes.LightGray);
if (formatter == null)
formatter = TextFormatterFactory.Create(context.TextView);
textLine = FormattedTextElement.PrepareText(formatter, text, p);
simpleLightGrayTexts[text] = textLine;
}
return textLine;
}
public IList<TextLineVisual> CreateLineVisual(Int32 lineNumber, IList<SpaceNegotiation> spaceNegotiations)
{
IList<ClassificationSpan> classificationSpans;
Int32 startOfLineFromLineNumber = _textView.TextBuffer.GetStartOfLineFromLineNumber(lineNumber);
Int32 startOfNextLineFromPosition = _textView.TextBuffer.GetStartOfNextLineFromPosition(startOfLineFromLineNumber);
Int32 lengthOfLineFromLineNumber = _textView.TextBuffer.GetLengthOfLineFromLineNumber(lineNumber);
Int32 length = 0;
if (startOfNextLineFromPosition == startOfLineFromLineNumber)
{
length = _textView.TextBuffer.GetEndOfLineFromPosition(startOfLineFromLineNumber) - startOfLineFromLineNumber;
}
else
{
length = startOfNextLineFromPosition - startOfLineFromLineNumber;
}
if (length > 0)
{
classificationSpans = _classifier.GetClassificationSpans(new VersionedTextSpan(_textView.TextBuffer, startOfLineFromLineNumber, length));
}
else
{
classificationSpans = new List<ClassificationSpan>(0);
}
TextFormattingSource textSource = new TextFormattingSource(_textView.TextBuffer, _classificationFormatMap, startOfLineFromLineNumber, length, classificationSpans, spaceNegotiations);
if (_textFormatter == null)
{
_textFormatter = TextFormatter.Create();
}
List<TextLine> textLines = new List<TextLine>();
Int32 firstCharIndex = 0;
TextLineBreak previousLineBreak = null;
while (firstCharIndex <= length)
{
TextLine item = _textFormatter.FormatLine(textSource, firstCharIndex, this.MaxLineWidth, _paragraphProperties, previousLineBreak);
firstCharIndex += item.Length;
previousLineBreak = item.GetTextLineBreak();
textLines.Add(item);
}
List<TextLineVisual> list3 = new List<TextLineVisual>();
list3.Add(new TextLineVisual(_textView, textLines, new TextSpan(_textView.TextBuffer, startOfLineFromLineNumber, length), length - lengthOfLineFromLineNumber, textSource.VirtualCharacterPositions));
return list3;
}
public FormattedLineSource(ITextFormatterProvider textFormatterProvider, ITextParagraphPropertiesFactoryService textParagraphPropertiesFactoryService, ITextSnapshot sourceTextSnapshot, ITextSnapshot visualBufferSnapshot, int tabSize, double baseIndent, double wordWrapWidth, double maxAutoIndent, bool useDisplayMode, IClassifier aggregateClassifier, ITextAndAdornmentSequencer sequencer, IClassificationFormatMap classificationFormatMap, bool isViewWrapEnabled) {
if (textFormatterProvider == null)
throw new ArgumentNullException(nameof(textFormatterProvider));
if (sourceTextSnapshot == null)
throw new ArgumentNullException(nameof(sourceTextSnapshot));
if (visualBufferSnapshot == null)
throw new ArgumentNullException(nameof(visualBufferSnapshot));
if (aggregateClassifier == null)
throw new ArgumentNullException(nameof(aggregateClassifier));
if (sequencer == null)
throw new ArgumentNullException(nameof(sequencer));
if (classificationFormatMap == null)
throw new ArgumentNullException(nameof(classificationFormatMap));
if (tabSize <= 0)
throw new ArgumentOutOfRangeException(nameof(tabSize));
if (sourceTextSnapshot != visualBufferSnapshot)
throw new NotSupportedException("Text snapshot must be identical to visual snapshot");
textFormatter = textFormatterProvider.Create(useDisplayMode);
formattedTextCache = new FormattedTextCache(useDisplayMode);
this.textParagraphPropertiesFactoryService = textParagraphPropertiesFactoryService;
SourceTextSnapshot = sourceTextSnapshot;
TopTextSnapshot = visualBufferSnapshot;
UseDisplayMode = useDisplayMode;
TabSize = tabSize;
BaseIndentation = baseIndent;
WordWrapWidth = wordWrapWidth;
MaxAutoIndent = Math.Round(maxAutoIndent);
ColumnWidth = formattedTextCache.GetColumnWidth(classificationFormatMap.DefaultTextProperties);
wrapGlyphWidth = isViewWrapEnabled ? 1.5 * ColumnWidth : 0;
LineHeight = WpfTextViewLine.DEFAULT_TOP_SPACE + WpfTextViewLine.DEFAULT_BOTTOM_SPACE + formattedTextCache.GetLineHeight(classificationFormatMap.DefaultTextProperties);
TextHeightAboveBaseline = formattedTextCache.GetTextHeightAboveBaseline(classificationFormatMap.DefaultTextProperties);
TextHeightBelowBaseline = formattedTextCache.GetTextHeightBelowBaseline(classificationFormatMap.DefaultTextProperties);
TextAndAdornmentSequencer = sequencer;
this.aggregateClassifier = aggregateClassifier;
this.classificationFormatMap = classificationFormatMap;
defaultTextParagraphProperties = new TextFormattingParagraphProperties(classificationFormatMap.DefaultTextProperties, ColumnWidth * TabSize);
}
void LineNumberMargin_IsVisibleChanged(object sender, DependencyPropertyChangedEventArgs e) {
if (Visibility == Visibility.Visible) {
if (!hasRegisteredEvents) {
RegisterEvents();
SetTop(textLayer, -wpfTextViewHost.TextView.ViewportTop);
UpdateMaxLineDigits();
UpdateLineNumberLayerSize();
UpdateForceClearTypeIfNeeded();
OnTextPropertiesChanged();
UpdateLines(Array.Empty<ITextViewLine>(), Array.Empty<ITextViewLine>());
}
}
else {
if (hasRegisteredEvents)
UnregisterEvents();
ClearLines();
defaultTextParagraphProperties = null;
textFormatter = null;
}
}
void OnTextPropertiesChanged() {
OnTextPropertiesChangedCore();
useDisplayMode = wpfTextViewHost.TextView.FormattedLineSource.UseDisplayMode;
var textFormattingMode = useDisplayMode ? TextFormattingMode.Display : TextFormattingMode.Ideal;
var defaultProps = GetDefaultTextFormattingRunProperties();
if (defaultProps == null)
return;
var brush = defaultProps.BackgroundBrush ?? Brushes.Transparent;
if (brush.CanFreeze)
brush.Freeze();
Background = brush;
var ft = new FormattedText("8", defaultProps.CultureInfo, FlowDirection.LeftToRight, defaultProps.Typeface, defaultProps.FontRenderingEmSize, defaultProps.ForegroundBrush, null, textFormattingMode);
currentMaxLineDigits = GetMaxLineDigits();
int maxLineNumberValue = Math.Min(int.MaxValue, (int)(Math.Pow(10, currentMaxLineDigits) - 1));
// Just in case non-digits are part of the string, calculate max string length
var lineNumberString = GetLineNumberString(maxLineNumberValue);
double leftMarginWidth = ft.Width;
double rightMarginWidth = ft.Width;
double width = leftMarginWidth + rightMarginWidth + ft.Width * lineNumberString.Length;
lineNumberTextRight = width - rightMarginWidth;
Width = width;
ClearLines();
defaultTextParagraphProperties = new TextFormattingParagraphProperties(defaultProps);
textFormatter = textFormatterProvider.Create(useDisplayMode);
}
/// <summary>
/// Constructs a TextLine from a simple text.
/// </summary>
public static TextLine PrepareText(TextFormatter formatter, string text, TextRunProperties properties)
{
if (formatter == null)
throw new ArgumentNullException("formatter");
if (text == null)
throw new ArgumentNullException("text");
if (properties == null)
throw new ArgumentNullException("properties");
return formatter.FormatLine(
new SimpleTextSource(text, properties),
0,
32000,
new VisualLineTextParagraphProperties
{
defaultTextRunProperties = properties,
textWrapping = TextWrapping.NoWrap,
tabSize = 40
},
null);
}
//-------------------------------------------------------------------
//
// Internal Methods
//
//-------------------------------------------------------------------
#region Internal Methods
/// <summary>
/// Create and format text line.
/// </summary>
/// <param name="dcp">First character position for the line.</param>
/// <param name="formatWidth">Width to pass to LS formatter.</param>
/// <param name="paragraphWidth">Line wrapping width.</param>
/// <param name="lineProperties">Line's properties.</param>
/// <param name="textRunCache">Run cache.</param>
/// <param name="formatter">Text formatter.</param>
/// <remarks>
/// formatWidth/paragraphWidth is an attempt to work around bug 114719.
/// Unfortunately, Line Services cannot guarantee that once a line
/// has been measured, measuring the same content with the actual line
/// width will produce the same line.
///
/// For example, suppose we format dcp 0 with paragraphWidth = 100.
/// Suppose this results in a line from dcp 0 - 10, with width = 95.
///
/// We would expect that a call to FormatLine with dcp = 0,
/// paragraphWidth = 95 would result in the same 10 char line.
/// But in practice it might return a 9 char line.
///
/// The workaround is to pass in an explicit formatting width across
/// multiple calls, even if the paragraphWidth changes.
/// </remarks>
internal void Format(int dcp, double formatWidth, double paragraphWidth, LineProperties lineProperties, TextRunCache textRunCache, TextFormatter formatter)
{
_lineProperties = lineProperties;
_dcp = dcp;
_paragraphWidth = paragraphWidth;
// We must ignore TextAlignment here since formatWidth does not
// necessarilly equal paragraphWidth. We'll adjust on later calls.
lineProperties.IgnoreTextAlignment = (lineProperties.TextAlignment != TextAlignment.Justify);
try
{
_line = formatter.FormatLine(this, dcp, formatWidth, lineProperties, null, textRunCache);
}
finally
{
lineProperties.IgnoreTextAlignment = false;
}
}
internal LineEnumerator(FormattedText text)
{
_previousHeight = 0;
_previousLength = 0;
_previousLineBreak = null;
_textStorePosition = 0;
_lineCount = 0;
_totalHeight = 0;
_currentLine = null;
_nextLine = null;
_formatter = TextFormatter.FromCurrentDispatcher(text._textFormattingMode);
_that = text;
if (_that._textSourceImpl == null)
_that._textSourceImpl = new TextSourceImplementation(_that);
}
static VisualTextLine() {
formatter = TextFormatter.Create();
paragraphProperties = new SimpleParagraphProperties { defaultTextRunProperties = TextConfiguration.GetGlobalTextRunProperties() };
}
public WpfTextFormatter(TextFormattingMode mode) {
formatter = TextFormatter.Create(mode);
}
void InitializeAll()
{
textFormatter = TextFormatter.Create(TextOptions.GetTextFormattingMode(this));
InitializeFontProperties();
InitializeSizeProperties(false);
RepaintLayers();
InvalidateScrollInfo();
}
TextFormatterProvider() {
idealModeTextFormatter = TextFormatter.Create(TextFormattingMode.Ideal);
displayModeTextFormatter = TextFormatter.Create(TextFormattingMode.Display);
}