private static bool GetLine(Paragraph paragraph, TextLine line, Win32DCSafeHandle hdc, FontCache fontCache, FlowContext flowContext, float left, float right, float height, Stack <int> lineRunsIndex, Stack <int> lineRunsCharIndex, int lineIndents)
{
float num = right - left;
float num2 = left;
bool newLine = false;
int num3 = 0;
do
{
lineRunsIndex.Push(flowContext.Context.TextRunIndex);
lineRunsCharIndex.Push(flowContext.Context.TextRunCharacterIndex);
TextRun subRunForLine = paragraph.GetSubRunForLine(flowContext.Context, ref newLine);
if (subRunForLine == null)
{
break;
}
line.LogicalRuns.Add(subRunForLine);
int width = subRunForLine.GetWidth(hdc, fontCache);
num3 = Math.Max(subRunForLine.GetWidth(hdc, fontCache, isAtLineEnd: true) - width, num3);
num2 += (float)width;
if (!(num2 + (float)num3 > right))
{
continue;
}
bool flag = flowContext.WordTrim;
if (!flowContext.LineLimit && flag)
{
if ((float)line.GetHeight(hdc, fontCache) >= height)
{
flag = false;
}
line.ResetHeight();
}
if (!subRunForLine.IsPlaceholderTextRun)
{
FoldLine(paragraph, line, hdc, fontCache, flowContext, flag, lineRunsIndex, lineRunsCharIndex, num - (float)num3, lineIndents);
break;
}
lineRunsIndex.Push(flowContext.Context.TextRunIndex);
lineRunsCharIndex.Push(flowContext.Context.TextRunCharacterIndex);
bool flag2 = true;
TextRun subRunForLine2 = paragraph.GetSubRunForLine(flowContext.Context, ref newLine);
if (subRunForLine2 != null)
{
flag2 = (subRunForLine.TextRunProperties.IndexInParagraph < subRunForLine2.TextRunProperties.IndexInParagraph);
}
flowContext.Context.TextRunIndex = lineRunsIndex.Pop();
flowContext.Context.TextRunCharacterIndex = lineRunsCharIndex.Pop();
if (flag2)
{
FoldLine(paragraph, line, hdc, fontCache, flowContext, flag, lineRunsIndex, lineRunsCharIndex, num - (float)num3, lineIndents);
break;
}
}while (!newLine);
if (line.LogicalRuns.Count == 0)
{
return(false);
}
return(true);
}
internal Underline(TextRun run, Win32DCSafeHandle hdc, FontCache fontCache, Rectangle layoutRectangle, int x, int baselineY, RPLFormat.WritingModes writingMode)
{
int width = run.GetWidth(hdc, fontCache);
int num = (int)((double)(int)((double)run.UnderlineHeight * 0.085) * 1.5);
switch (writingMode)
{
case RPLFormat.WritingModes.Horizontal:
m_startPoint = new Point(layoutRectangle.X + x, layoutRectangle.Y + baselineY + num);
m_endPoint = new Point(Math.Min(m_startPoint.X + width, layoutRectangle.Right), m_startPoint.Y);
break;
case RPLFormat.WritingModes.Vertical:
m_startPoint = new Point(layoutRectangle.Right - baselineY - num - 1, layoutRectangle.Y + x);
m_endPoint = new Point(m_startPoint.X, Math.Min(m_startPoint.Y + width, layoutRectangle.Bottom));
break;
case RPLFormat.WritingModes.Rotate270:
m_startPoint = new Point(layoutRectangle.X + baselineY + num, layoutRectangle.Bottom - x);
m_endPoint = new Point(m_startPoint.X, Math.Max(m_startPoint.Y - width, layoutRectangle.Top));
break;
}
}
private static void RenderParagraph(TextBox textBox, Paragraph paragraph, Win32DCSafeHandle hdc, FontCache fontCache, int offsetX, ref int offsetY, Rectangle layoutRectangle, float dpiX)
{
List <TextLine> textLines = paragraph.TextLines;
IParagraphProps paragraphProps = paragraph.ParagraphProps;
bool flag = textBox.TextBoxProps.Direction == RPLFormat.Directions.LTR;
RPLFormat.TextAlignments textAlignments = paragraphProps.Alignment;
if (textAlignments == RPLFormat.TextAlignments.General)
{
textAlignments = textBox.TextBoxProps.DefaultAlignment;
if (!flag)
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Right:
textAlignments = RPLFormat.TextAlignments.Left;
break;
case RPLFormat.TextAlignments.Left:
textAlignments = RPLFormat.TextAlignments.Right;
break;
}
}
}
int num = ConvertToPixels(paragraphProps.LeftIndent, dpiX);
int num2 = ConvertToPixels(paragraphProps.RightIndent, dpiX);
int num3 = ConvertToPixels(paragraphProps.HangingIndent, dpiX);
if (num3 < 0)
{
if (flag)
{
num -= num3;
}
else
{
num2 -= num3;
}
}
if (paragraphProps.ListLevel > 0)
{
int num4 = paragraphProps.ListLevel * ConvertToPixels(10.583333f, dpiX);
if (flag)
{
num += num4;
}
else
{
num2 += num4;
}
}
if (textLines == null || textLines.Count == 0)
{
offsetY += ConvertToPixels(paragraphProps.SpaceBefore, dpiX);
offsetY += ConvertToPixels(paragraphProps.SpaceAfter, dpiX);
return;
}
Graphics graphics = null;
try
{
for (int i = 0; i < textLines.Count; i++)
{
TextLine textLine = textLines[i];
int ascent = textLine.GetAscent(hdc, fontCache);
textLine.GetDescent(hdc, fontCache);
int height = textLine.GetHeight(hdc, fontCache);
if (textLine.FirstLine)
{
offsetY += ConvertToPixels(paragraphProps.SpaceBefore, dpiX);
}
int baselineY = offsetY + ascent;
offsetY += height;
int num5 = offsetX;
switch (textAlignments)
{
case RPLFormat.TextAlignments.Left:
num5 = num;
break;
case RPLFormat.TextAlignments.Center:
{
int num6 = 0;
num6 = ((!textBox.HorizontalText) ? layoutRectangle.Height : layoutRectangle.Width);
num5 = num + (num6 - num - num2) / 2 - textLine.GetWidth(hdc, fontCache) / 2;
break;
}
default:
num5 = ((!textBox.HorizontalText) ? (layoutRectangle.Height - num2 - textLine.GetWidth(hdc, fontCache)) : (layoutRectangle.Width - num2 - textLine.GetWidth(hdc, fontCache)));
break;
}
if (textLine.Prefix != null && textLine.Prefix.Count > 0)
{
int num7 = (!flag) ? (num5 + textLine.GetWidth(hdc, fontCache) + ConvertToPixels(4.233333f, dpiX)) : (num5 - ConvertToPixels(4.233333f, dpiX) - textLine.GetPrefixWidth(hdc, fontCache));
if (num3 < 0)
{
if (flag && textAlignments == RPLFormat.TextAlignments.Left)
{
num7 += num3;
}
else if (!flag && textAlignments == RPLFormat.TextAlignments.Right)
{
num7 -= num3;
}
}
for (int j = 0; j < textLine.Prefix.Count; j++)
{
TextRun textRun = textLine.Prefix[j];
textBox.TextBoxProps.DrawTextRun(textRun, paragraph, hdc, dpiX, fontCache, num7, offsetY, baselineY, height, layoutRectangle);
num7 += textRun.GetWidth(hdc, fontCache);
}
}
if (textLine.FirstLine && num3 != 0)
{
if (flag)
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Left:
num5 += num3;
break;
case RPLFormat.TextAlignments.Center:
num5 += num3 / 2;
break;
}
}
else
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Right:
num5 -= num3;
break;
case RPLFormat.TextAlignments.Center:
num5 -= num3 / 2;
break;
}
}
}
int prevRunWidth = 0;
int prevRunX = 0;
TextRun prevRun = null;
int count = textLine.VisualRuns.Count;
for (int k = 0; k < count; k++)
{
TextRun textRun2 = textLine.VisualRuns[k];
int width = textRun2.GetWidth(hdc, fontCache, k == count - 1);
if (!textRun2.IsHighlightTextRun)
{
if (width > 0)
{
textBox.TextBoxProps.DrawTextRun(textRun2, paragraph, hdc, dpiX, fontCache, num5, offsetY, baselineY, height, layoutRectangle);
}
}
else
{
bool flag2 = (flag && k + 1 == count) || (!flag && k == 0);
if (width > 0 || flag2)
{
if (graphics == null)
{
graphics = Graphics.FromHdc(hdc.Handle);
}
RenderHighlightedTextRun(textBox, paragraph, textRun2, prevRun, hdc, graphics, fontCache, dpiX, num5, offsetY, baselineY, height, layoutRectangle, width, prevRunWidth, prevRunX, flag2, textLine.LastLine);
}
}
prevRunX = num5;
prevRunWidth = width;
num5 += width;
prevRun = textRun2;
}
if (textLine.LastLine)
{
offsetY += ConvertToPixels(paragraphProps.SpaceAfter, dpiX);
}
}
}
finally
{
if (graphics != null)
{
graphics.Dispose();
graphics = null;
}
}
}
private Point GetParagraphAndRunCoordinates(Win32DCSafeHandle hdc, TextBoxContext location, bool moveCaretToNextLine, out int lineYOffset, out int lineHeight, out TextRun textRun, out int textRunCharacterIndex, out bool isFirstLine, out bool isLastLine)
{
int num = 0;
int textRunIndex = location.TextRunIndex;
textRunCharacterIndex = location.TextRunCharacterIndex;
lineYOffset = 0;
lineHeight = 0;
textRun = null;
isFirstLine = true;
isLastLine = true;
List <Paragraph> rTParagraphs = RTParagraphs;
if (rTParagraphs == null || location.ParagraphIndex >= rTParagraphs.Count)
{
return(Point.Empty);
}
Paragraph paragraph = rTParagraphs[location.ParagraphIndex];
int num2 = paragraph.OffsetY + TextBox.ConvertToPixels(paragraph.ParagraphProps.SpaceBefore, Dpi);
int num3 = TextBox.ConvertToPixels(paragraph.ParagraphProps.LeftIndent, Dpi);
int num4 = TextBox.ConvertToPixels(paragraph.ParagraphProps.RightIndent, Dpi);
int num5 = TextBox.ConvertToPixels(paragraph.ParagraphProps.HangingIndent, Dpi);
bool flag = m_rttextbox.TextBoxProps.Direction == RPLFormat.Directions.LTR;
if (num5 < 0)
{
if (flag)
{
num3 -= num5;
}
else
{
num4 -= num5;
}
}
int listLevel = paragraph.ParagraphProps.ListLevel;
if (listLevel > 0)
{
int num6 = listLevel * TextBox.ConvertToPixels(10.583333f, Dpi);
if (flag)
{
num3 += num6;
}
else
{
num4 += num6;
}
}
for (int i = 0; i < paragraph.TextLines.Count; i++)
{
TextLine textLine = paragraph.TextLines[i];
int descent = textLine.GetDescent(hdc, FontCache);
lineHeight = textLine.GetHeight(hdc, FontCache);
lineYOffset = num2;
num2 += lineHeight;
RPLFormat.TextAlignments textAlignments = paragraph.ParagraphProps.Alignment;
if (textAlignments == RPLFormat.TextAlignments.General)
{
textAlignments = m_rttextbox.TextBoxProps.DefaultAlignment;
if (!flag)
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Left:
textAlignments = RPLFormat.TextAlignments.Right;
break;
case RPLFormat.TextAlignments.Right:
textAlignments = RPLFormat.TextAlignments.Left;
break;
}
}
}
switch (textAlignments)
{
case RPLFormat.TextAlignments.Center:
num = num3 + (WidthInPX - num3 - num4) / 2 - textLine.GetWidth(hdc, FontCache) / 2;
break;
case RPLFormat.TextAlignments.Right:
num = WidthInPX - textLine.GetWidth(hdc, FontCache) - num4;
break;
default:
num = num3;
break;
}
if (textLine.FirstLine && num5 != 0)
{
if (flag)
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Left:
num += num5;
break;
case RPLFormat.TextAlignments.Center:
num += num5 / 2;
break;
}
}
else
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Right:
num -= num5;
break;
case RPLFormat.TextAlignments.Center:
num -= num5 / 2;
break;
}
}
}
int count = textLine.VisualRuns.Count;
for (int j = 0; j < count; j++)
{
textRun = textLine.VisualRuns[j];
if (textRun.TextRunProperties.IndexInParagraph == textRunIndex && textRunCharacterIndex >= textRun.CharacterIndexInOriginal)
{
bool flag2 = (moveCaretToNextLine || textRun.CharacterCount <= 0 || textRun.Text[textRun.CharacterCount - 1] != '\n') ? (textRunCharacterIndex <= textRun.CharacterIndexInOriginal + textRun.CharacterCount) : (textRunCharacterIndex < textRun.CharacterIndexInOriginal + textRun.CharacterCount);
if (flag2 || (i + 1 == paragraph.TextLines.Count && j + 1 == count))
{
if (moveCaretToNextLine && textRunCharacterIndex == textRun.CharacterIndexInOriginal + textRun.CharacterCount && j + 1 == count && i + 1 < paragraph.TextLines.Count)
{
location = location.Clone();
if (paragraph.TextLines[i + 1].VisualRuns[0].TextRunProperties.IndexInParagraph != textRunIndex)
{
location.TextRunIndex++;
location.TextRunCharacterIndex = 0;
}
Point paragraphAndRunCoordinates = GetParagraphAndRunCoordinates(hdc, location, moveCaretToNextLine: false, out lineYOffset, out lineHeight, out textRun, out textRunCharacterIndex, out isFirstLine, out isLastLine);
textRunCharacterIndex = Math.Max(textRunCharacterIndex - 1, 0);
return(paragraphAndRunCoordinates);
}
textRunCharacterIndex -= textRun.CharacterIndexInOriginal;
isFirstLine = textLine.FirstLine;
isLastLine = textLine.LastLine;
return(new Point(num, num2 - descent));
}
}
num += textRun.GetWidth(hdc, FontCache);
}
}
textRun = null;
return(Point.Empty);
}
private TextBoxContext GetParagraphAndRunIndex(Win32DCSafeHandle hdc, Paragraph paragraph, TextLine line, int x, int lineWidth, bool lastParagraph, out TextRun run, ref int runX, out bool atEndOfLine)
{
atEndOfLine = false;
run = null;
int count = line.VisualRuns.Count;
for (int i = 0; i < count; i++)
{
run = line.VisualRuns[i];
int width = run.GetWidth(hdc, FontCache, i == count - 1);
if (runX - width <= 0 || i + 1 == count)
{
if (runX - width > 0)
{
atEndOfLine = true;
if (run.ScriptAnalysis.fLayoutRTL == 1 && x >= lineWidth)
{
run = line.VisualRuns[count - 1];
return(new TextBoxContext
{
TextRunIndex = run.TextRunProperties.IndexInParagraph,
TextRunCharacterIndex = run.CharacterIndexInOriginal
});
}
}
int num = 0;
int characterCount = run.CharacterCount;
if (characterCount > 0)
{
if ((run.ScriptAnalysis.fLayoutRTL == 0 && i + 1 == count) || (run.ScriptAnalysis.fLayoutRTL == 1 && i == 0))
{
if (width <= 0)
{
string text = run.Text;
if (characterCount > 1 && text[characterCount - 2] == '\r' && text[characterCount - 1] == '\n')
{
num = ((run.ScriptAnalysis.fLayoutRTL != 0) ? (-1) : (-2));
}
else if (text[characterCount - 1] == '\n' && run.ScriptAnalysis.fLayoutRTL == 0)
{
if (i > 0)
{
run = line.VisualRuns[i - 1];
if (run.CharacterCount > 0 && run.Text[run.CharacterCount - 1] == '\r')
{
num = -1;
}
}
else
{
num = -1;
}
}
}
else if (i + 1 == count && (run.Text[characterCount - 1] == '\r' || run.Text[characterCount - 1] == '\n'))
{
num = -1;
}
else if (i == 0 && (run.Text[0] == '\r' || run.Text[0] == '\n'))
{
num = -1;
}
}
else if (i == 0 && (run.Text[0] == '\r' || run.Text[0] == '\n'))
{
num = -1;
}
}
else if (lastParagraph && line.LastLine && !line.FirstLine)
{
num = 1;
}
return(new TextBoxContext
{
TextRunIndex = run.TextRunProperties.IndexInParagraph,
TextRunCharacterIndex = run.CharacterIndexInOriginal + num
});
}
runX -= width;
}
return(null);
}
private void SetHighlighting(List <Paragraph> paragraphs, Win32DCSafeHandle hdc, RTSelectionHighlight highlight, TextRun runStart, TextRun runEnd, int x1, int x2)
{
if (runStart == runEnd)
{
if (x1 != x2)
{
if (x1 < x2)
{
runStart.HighlightStart = x1;
runStart.HighlightEnd = x2;
}
else
{
runStart.HighlightStart = x2;
runStart.HighlightEnd = x1;
}
runStart.HighlightColor = highlight.Color;
runStart.AllowColorInversion = highlight.AllowColorInversion;
}
return;
}
bool flag = false;
bool flag2 = false;
Color color = highlight.Color;
bool allowColorInversion = highlight.AllowColorInversion;
for (int i = highlight.SelectionStart.ParagraphIndex; i <= highlight.SelectionEnd.ParagraphIndex; i++)
{
int count = paragraphs[i].TextLines.Count;
for (int j = 0; j < count; j++)
{
List <TextRun> logicalRuns = paragraphs[i].TextLines[j].LogicalRuns;
int count2 = logicalRuns.Count;
for (int k = 0; k < count2; k++)
{
TextRun textRun = logicalRuns[k];
bool flag3 = textRun.ScriptAnalysis.fLayoutRTL == 0;
if (textRun == runStart)
{
flag2 = true;
if (flag3 && x1 < textRun.GetWidth(hdc, FontCache))
{
textRun.HighlightStart = x1;
textRun.HighlightEnd = -1;
textRun.HighlightColor = color;
textRun.AllowColorInversion = allowColorInversion;
}
else if (!flag3 && x1 > 0)
{
textRun.HighlightStart = -1;
textRun.HighlightEnd = x1;
textRun.HighlightColor = color;
textRun.AllowColorInversion = allowColorInversion;
}
continue;
}
if (textRun == runEnd)
{
flag2 = false;
if (flag3 && x2 > 0)
{
textRun.HighlightStart = -1;
textRun.HighlightEnd = x2;
textRun.HighlightColor = color;
textRun.AllowColorInversion = allowColorInversion;
}
else if (!flag3 && x2 < textRun.GetWidth(hdc, FontCache))
{
textRun.HighlightStart = x2;
textRun.HighlightEnd = -1;
textRun.HighlightColor = color;
textRun.AllowColorInversion = allowColorInversion;
}
flag = true;
break;
}
if (flag2)
{
textRun.HighlightStart = -1;
textRun.HighlightEnd = -1;
textRun.HighlightColor = color;
textRun.AllowColorInversion = allowColorInversion;
}
}
if (flag)
{
break;
}
}
if (flag)
{
break;
}
}
}
private static void FoldLine(Paragraph paragraph, TextLine line, Win32DCSafeHandle hdc, FontCache fontCache, FlowContext flowContext, bool wordTrim, Stack <int> lineRunsIndex, Stack <int> lineRunsCharIndex, float maxWidth, int lineIndents)
{
int count = line.LogicalRuns.Count;
float num = 0f;
for (int i = 0; i < count; i++)
{
num += (float)line.LogicalRuns[i].GetWidth(hdc, fontCache);
}
int num2 = -1;
bool flag = false;
for (int num3 = count - 1; num3 >= 0; num3--)
{
TextRun textRun = line.LogicalRuns[num3];
num -= (float)textRun.GetWidth(hdc, fontCache);
SCRIPT_LOGATTR?nextCharLogAttr = null;
if (num3 != count - 1)
{
TextRun textRun2 = line.LogicalRuns[num3 + 1];
if (textRun2.CharacterCount > 0)
{
nextCharLogAttr = textRun2.ScriptLogAttr[0];
}
}
if (!textRun.IsPlaceholderTextRun)
{
flag = true;
int num4 = 0;
num4 = ((!wordTrim) ? FindFoldTextPosition_CharacterTrim(textRun, hdc, fontCache, maxWidth - num) : FindFoldTextPosition_TextRunTrim(textRun, hdc, fontCache, maxWidth - num, nextCharLogAttr));
if (num4 > 0)
{
FoldLineAt(line, num3, num4, flowContext.Context, lineRunsIndex, lineRunsCharIndex);
return;
}
}
else if (num2 > 0 && textRun.TextRunProperties.IndexInParagraph != num2)
{
flag = true;
}
num2 = textRun.TextRunProperties.IndexInParagraph;
}
if (line.LogicalRuns.Count > 1)
{
if (!flag)
{
return;
}
int num5;
for (num5 = line.LogicalRuns.Count - 1; num5 > 0; num5--)
{
flowContext.Context.TextRunIndex = lineRunsIndex.Pop();
flowContext.Context.TextRunCharacterIndex = lineRunsCharIndex.Pop();
TextRun textRun3 = line.LogicalRuns[num5];
if (!textRun3.IsPlaceholderTextRun || textRun3.CharacterIndexInOriginal == 0)
{
break;
}
}
line.LogicalRuns.RemoveRange(num5, line.LogicalRuns.Count - num5);
}
else
{
if (!flag)
{
return;
}
int num6 = 1;
if (maxWidth > 0f)
{
flowContext.ForcedCharTrim = true;
if (flowContext.VerticalCanGrow)
{
num6 = FindWidthToBreakPosition(line.LogicalRuns[0], hdc, fontCache, maxWidth, out int width);
flowContext.CharTrimmedRunWidth = Math.Max(flowContext.CharTrimmedRunWidth, width + lineIndents);
}
else
{
num6 = FindFoldTextPosition_CharacterTrim(line.LogicalRuns[0], hdc, fontCache, maxWidth);
}
if (num6 == 0)
{
num6 = 1;
}
}
else if (line.FirstLine && paragraph.ParagraphProps.HangingIndent > 0f)
{
num6 = 0;
if (flowContext.Updatable)
{
paragraph.Updated = true;
}
}
FoldLineAt(line, 0, num6, flowContext.Context, lineRunsIndex, lineRunsCharIndex);
}
}
private void CalculateDimensions(Win32DCSafeHandle hdc, FontCache fontCache, bool useVisualRunsIfAvailable)
{
if (m_calculatedDimensions)
{
return;
}
bool flag = useVisualRunsIfAvailable && m_visualRuns != null;
List <TextRun> list = flag ? m_visualRuns : m_logicalRuns;
m_width = 0;
m_prefixWidth = 0;
int count = list.Count;
int num = 0;
for (int i = 0; i < count; i++)
{
TextRun textRun = list[i];
int width = textRun.GetWidth(hdc, fontCache);
m_width += width;
if (!flag)
{
num = Math.Max(textRun.GetWidth(hdc, fontCache, isAtLineEnd: true) - width, num);
}
else if (i == count - 1)
{
num = textRun.GetWidth(hdc, fontCache, isAtLineEnd: true) - width;
}
if (!m_calculatedHeight)
{
int ascent = textRun.GetAscent(hdc, fontCache);
if (ascent > m_ascent)
{
m_ascent = ascent;
}
int descent = textRun.GetDescent(hdc, fontCache);
if (descent > m_descent)
{
m_descent = descent;
}
}
}
m_width += num;
if (m_prefix != null)
{
for (int j = 0; j < m_prefix.Count; j++)
{
TextRun textRun2 = m_prefix[j];
if (!m_calculatedHeight)
{
int ascent2 = textRun2.GetAscent(hdc, fontCache);
if (ascent2 > m_ascent)
{
m_ascent = ascent2;
}
int descent2 = textRun2.GetDescent(hdc, fontCache);
if (descent2 > m_descent)
{
m_descent = descent2;
}
}
m_prefixWidth += textRun2.GetWidth(hdc, fontCache);
}
}
m_calculatedDimensions = true;
m_calculatedHeight = true;
}