private double _baseGuidelineY; // the Y guideline of the text line.
/// <summary>
/// Construct drawing state for full text
/// </summary>
internal DrawingState(
DrawingContext drawingContext,
Point lineOrigin,
MatrixTransform antiInversion,
TextMetrics.FullTextLine currentLine
)
{
_drawingContext = drawingContext;
_antiInversion = antiInversion;
_currentLine = currentLine;
if (antiInversion == null)
{
_lineOrigin = lineOrigin;
}
else
{
_vectorToLineOrigin = lineOrigin;
}
if (_drawingContext != null)
{
// LineServices draws GlyphRun and TextDecorations in multiple
// callbacks and GlyphRuns may have different baselines. Pushing guideline
// for each DrawGlyphRun are too costly. We optimize for the common case where
// GlyphRuns and TextDecorations in the TextLine share the same baseline.
_baseGuidelineY = lineOrigin.Y + currentLine.Baseline;
_drawingContext.PushGuidelineY1(_baseGuidelineY);
}
}
private FullTextLine(TextFormattingMode textFormattingMode, bool justify)
{
_textFormattingMode = textFormattingMode;
if (justify)
{
_statusFlags |= StatusFlags.IsJustified;
}
_metrics = new TextMetrics();
_ploline = new SecurityCriticalDataForSet<IntPtr>(IntPtr.Zero);
}
/// <summary>
/// Empty private constructor
/// </summary>
private FullTextBreakpoint()
{
_metrics = new TextMetrics();
}
/// <summary>
/// Empty private constructor
/// </summary>
private FullTextBreakpoint()
{
_metrics = new TextMetrics();
}
/// <summary>
/// Create a rectangle of the two specified UV coordinates
/// </summary>
/// <param name="origin">line drawing origin</param>
/// <param name="topLeft">logical top-left point</param>
/// <param name="bottomRight">logical bottom-right point</param>
/// <param name="line">container line</param>
internal static Rect RectUV(
Point origin,
LSPOINT topLeft,
LSPOINT bottomRight,
TextMetrics.FullTextLine line
)
{
int dx = topLeft.x - bottomRight.x;
if(dx == 1 || dx == -1)
{
// in certain situation LS can be off by 1
bottomRight.x = topLeft.x;
}
Rect rect = new Rect(
new Point(line.Formatter.IdealToReal(topLeft.x), line.Formatter.IdealToReal(topLeft.y)),
new Point(line.Formatter.IdealToReal(bottomRight.x), line.Formatter.IdealToReal(bottomRight.y))
);
if(DoubleUtil.AreClose(rect.TopLeft.X, rect.BottomRight.X))
{
rect.Width = 0;
}
if(DoubleUtil.AreClose(rect.TopLeft.Y, rect.BottomRight.Y))
{
rect.Height = 0;
}
return rect;
}
/// <summary>
/// Map a UV ideal coordinate to an XY ideal coordinate
/// </summary>
/// <param name="origin">line drawing origin</param>
/// <param name="vectorToOrigin">vector to line origin UV</param>
/// <param name="u">ideal distance in text flow direction</param>
/// <param name="v">ideal distance in paragraph flow direction</param>
/// <param name="line">container line</param>
/// <param name="nominalX">ideal X origin</param>
/// <param name="nominalY">ideal Y origin</param>
internal static void UVToNominalXY(
Point origin,
Point vectorToOrigin,
int u,
int v,
TextMetrics.FullTextLine line,
out int nominalX,
out int nominalY
)
{
origin.Y += vectorToOrigin.Y;
if (line.RightToLeft)
{
nominalX = line.ParagraphWidth - u + TextFormatterImp.RealToIdeal(-vectorToOrigin.X + origin.X);
}
else
{
nominalX = u + TextFormatterImp.RealToIdeal(vectorToOrigin.X + origin.X);
}
nominalY = v + TextFormatterImp.RealToIdeal(origin.Y);
}
/// <summary>
/// Map a UV ideal coordinate to an XY real coordinate
/// </summary>
/// <param name="origin">line drawing origin</param>
/// <param name="vectorToOrigin">vector to line origin UV</param>
/// <param name="u">ideal distance in text flow direction</param>
/// <param name="v">ideal distance in paragraph flow direction</param>
/// <param name="line">container line</param>
internal static Point UVToXY(
Point origin,
Point vectorToOrigin,
int u,
int v,
TextMetrics.FullTextLine line
)
{
Point xy;
origin.Y += vectorToOrigin.Y;
if (line.RightToLeft)
{
xy = new Point(line.Formatter.IdealToReal(line.ParagraphWidth - u) - vectorToOrigin.X + origin.X, line.Formatter.IdealToReal(v) + origin.Y);
}
else
{
xy = new Point(line.Formatter.IdealToReal(u) + vectorToOrigin.X + origin.X, line.Formatter.IdealToReal(v) + origin.Y);
}
return xy;
}