private CaretInfo MapLocation(Graphics g, TextBoxContext location, bool relativeToRun, bool moveCaretToNextLine, out TextRun run)
{
Win32DCSafeHandle win32DCSafeHandle = null;
bool flag = false;
try
{
if (g == null)
{
flag = true;
g = Graphics.FromHwnd(IntPtr.Zero);
}
win32DCSafeHandle = new Win32DCSafeHandle(g.GetHdc(), ownsHandle: false);
return(MapLocation(win32DCSafeHandle, location, relativeToRun, moveCaretToNextLine, out run));
}
finally
{
if (!win32DCSafeHandle.IsInvalid)
{
g.ReleaseHdc();
}
if (flag)
{
g.Dispose();
g = null;
}
}
}
internal void AdvanceToNextRun(TextBoxContext context, bool skipEmptyRuns)
{
if (context == null || context.TextRunIndex >= m_runs.Count)
{
return;
}
TextRun textRun = m_runs[context.TextRunIndex];
int num = (textRun.Text != null) ? textRun.Text.Length : 0;
if (m_runs.Count == 1 && num == 0)
{
if (m_processedEmptyParagraph)
{
context.TextRunIndex++;
context.TextRunCharacterIndex = 0;
}
else
{
m_processedEmptyParagraph = true;
}
}
else if (context.TextRunCharacterIndex == num && (skipEmptyRuns || num > 0))
{
context.TextRunIndex++;
context.TextRunCharacterIndex = 0;
}
}
internal void Render(Graphics g, RectangleF rectangle, PointF offset, IEnumerable <RTSelectionHighlight> highlights, bool unitsInMM)
{
List <Paragraph> rTParagraphs = RTParagraphs;
if (rTParagraphs == null || rTParagraphs.Count == 0)
{
return;
}
using (RevertingDeviceContext revertingDeviceContext = new RevertingDeviceContext(g, Dpi))
{
Win32DCSafeHandle hdc = revertingDeviceContext.Hdc;
if (highlights != null)
{
_ = RTTextbox.TextBoxProps.Direction;
foreach (RTSelectionHighlight highlight in highlights)
{
if (!HighlightStartLessThanOrEqualToEnd(highlight.SelectionStart, highlight.SelectionEnd))
{
TextBoxContext selectionStart = highlight.SelectionStart;
highlight.SelectionStart = highlight.SelectionEnd;
highlight.SelectionEnd = selectionStart;
}
TextRun run;
CaretInfo caretInfo = MapLocation(hdc, highlight.SelectionStart, relativeToRun: true, moveCaretToNextLine: true, out run);
TextRun run2;
CaretInfo caretInfo2 = MapLocation(hdc, highlight.SelectionEnd, relativeToRun: true, moveCaretToNextLine: true, out run2);
if (caretInfo != null && caretInfo2 != null && run != null && run2 != null)
{
SetHighlighting(rTParagraphs, hdc, highlight, run, run2, caretInfo.Position.X, caretInfo2.Position.X);
}
}
}
Rectangle rect = (!unitsInMM) ? Rectangle.Round(rectangle) : new Rectangle(TextBox.ConvertToPixels(rectangle.X, m_dpi), TextBox.ConvertToPixels(rectangle.Y, m_dpi), TextBox.ConvertToPixels(rectangle.Width, m_dpi), TextBox.ConvertToPixels(rectangle.Height, m_dpi));
revertingDeviceContext.XForm.Transform(ref rect);
Win32ObjectSafeHandle win32ObjectSafeHandle = Win32.CreateRectRgn(rect.Left - 1, rect.Top - 1, rect.Right + 1, rect.Bottom + 1);
if (!win32ObjectSafeHandle.IsInvalid)
{
try
{
if (Win32.SelectClipRgn(hdc, win32ObjectSafeHandle) == 0)
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
}
finally
{
win32ObjectSafeHandle.Close();
}
}
TextBox.Render(RTTextbox, rTParagraphs, hdc, FontCache, offset, rectangle, m_dpi, unitsInMM);
if (Win32.SelectClipRgn(hdc, Win32ObjectSafeHandle.Zero) == 0)
{
Marshal.ThrowExceptionForHR(Marshal.GetHRForLastWin32Error());
}
}
}
private static bool HighlightStartLessThanOrEqualToEnd(TextBoxContext start, TextBoxContext end)
{
if (start.ParagraphIndex == end.ParagraphIndex)
{
if (start.TextRunIndex == end.TextRunIndex)
{
return(start.TextRunCharacterIndex <= end.TextRunCharacterIndex);
}
return(start.TextRunIndex <= end.TextRunIndex);
}
return(start.ParagraphIndex <= end.ParagraphIndex);
}
internal bool AtEndOfParagraph(TextBoxContext context)
{
if (context == null)
{
return(false);
}
if (context.TextRunIndex < m_runs.Count)
{
return(false);
}
return(true);
}
private CaretInfo MapLocation(Win32DCSafeHandle hdc, TextBoxContext location, bool relativeToRun, bool moveCaretToNextLine, out TextRun run)
{
CaretInfo caretInfo = null;
run = null;
int lineYOffset;
int lineHeight;
int textRunCharacterIndex;
bool isFirstLine;
bool isLastLine;
Point paragraphAndRunCoordinates = GetParagraphAndRunCoordinates(hdc, location, moveCaretToNextLine, out lineYOffset, out lineHeight, out run, out textRunCharacterIndex, out isFirstLine, out isLastLine);
if (run != null)
{
GlyphData glyphData = run.GlyphData;
GlyphShapeData glyphScriptShapeData = glyphData.GlyphScriptShapeData;
int piX = 0;
if (glyphData != null && run.CharacterCount > 0)
{
int num = Win32.ScriptCPtoX(textRunCharacterIndex, fTrailing: false, run.CharacterCount, glyphScriptShapeData.GlyphCount, glyphScriptShapeData.Clusters, glyphScriptShapeData.VisAttrs, glyphData.Advances, ref run.SCRIPT_ANALYSIS, ref piX);
if (Win32.Failed(num))
{
Marshal.ThrowExceptionForHR(num);
}
}
caretInfo = new CaretInfo();
CachedFont cachedFont = run.GetCachedFont(hdc, FontCache);
caretInfo.Height = cachedFont.GetHeight(hdc, FontCache);
caretInfo.Ascent = cachedFont.GetAscent(hdc, FontCache);
caretInfo.Descent = cachedFont.GetDescent(hdc, FontCache);
caretInfo.LineHeight = lineHeight;
caretInfo.LineYOffset = lineYOffset;
caretInfo.IsFirstLine = isFirstLine;
caretInfo.IsLastLine = isLastLine;
_ = RTParagraphs;
int y = paragraphAndRunCoordinates.Y - caretInfo.Ascent;
if (relativeToRun)
{
caretInfo.Position = new Point(piX, y);
}
else
{
caretInfo.Position = new Point(paragraphAndRunCoordinates.X + piX, y);
}
}
return(caretInfo);
}
internal TextBoxContext MapPoint(Graphics g, PointF pt, out bool atEndOfLine)
{
TextBoxContext textBoxContext = null;
atEndOfLine = false;
textBoxContext = GetParagraphAndRunIndex(g, (int)pt.X, (int)pt.Y, out TextRun run, out int runX, out atEndOfLine);
if (run != null)
{
GlyphData glyphData = run.GlyphData;
GlyphShapeData glyphScriptShapeData = glyphData.GlyphScriptShapeData;
if (glyphData != null && run.CharacterCount > 0)
{
int piCP = 0;
int piTrailing = 0;
int num = Win32.ScriptXtoCP(runX, run.CharacterCount, glyphScriptShapeData.GlyphCount, glyphScriptShapeData.Clusters, glyphScriptShapeData.VisAttrs, glyphData.Advances, ref run.SCRIPT_ANALYSIS, ref piCP, ref piTrailing);
if (Win32.Failed(num))
{
Marshal.ThrowExceptionForHR(num);
}
if (run.ScriptAnalysis.fLayoutRTL == 1)
{
if (piCP == -1)
{
textBoxContext.TextRunCharacterIndex += run.CharacterCount;
}
else if (pt.X <= 0f)
{
TextBoxContext textBoxContext2 = textBoxContext;
textBoxContext2.TextRunCharacterIndex = textBoxContext2.TextRunCharacterIndex;
}
else
{
textBoxContext.TextRunCharacterIndex += piCP + piTrailing;
}
}
else
{
textBoxContext.TextRunCharacterIndex += piCP + piTrailing;
}
}
}
if (textBoxContext == null)
{
textBoxContext = new TextBoxContext();
}
return(textBoxContext);
}
internal TextRun GetSubRunForLine(TextBoxContext context, ref bool newLine)
{
AdvanceToNextRun(context);
if (context.TextRunIndex < m_runs.Count)
{
TextRun textRun = m_runs[context.TextRunIndex];
string text = null;
bool flag = false;
if (context.TextRunCharacterIndex == 0)
{
text = (textRun.Text ?? "");
}
else
{
flag = true;
text = textRun.Text.Substring(context.TextRunCharacterIndex);
}
int num = text.IndexOf('\n');
if (num != -1)
{
if (num + 1 < text.Length)
{
text = text.Substring(0, num + 1);
flag = true;
}
newLine = true;
}
if (flag)
{
SCRIPT_LOGATTR[] array = new SCRIPT_LOGATTR[text.Length];
Array.Copy(textRun.ScriptLogAttr, context.TextRunCharacterIndex, array, 0, array.Length);
TextRun textRun2 = textRun.Split(text, array);
textRun2.CharacterIndexInOriginal += context.TextRunCharacterIndex;
textRun2.Clone = true;
context.TextRunCharacterIndex += text.Length;
return(textRun2);
}
context.TextRunCharacterIndex += text.Length;
return(textRun);
}
return(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);
}
internal CaretInfo MapLocation(Graphics g, TextBoxContext location, bool moveCaretToNextLine)
{
TextRun run;
return(MapLocation(g, location, relativeToRun: false, moveCaretToNextLine, out run));
}
internal CaretInfo MapLocation(TextBoxContext location, bool moveCaretToNextLine)
{
return(MapLocation(null, location, moveCaretToNextLine));
}
internal RTSelectionHighlight(TextBoxContext Start, TextBoxContext End)
{
m_selectionStart = Start;
m_selectionEnd = End;
}
private TextBoxContext GetParagraphAndRunIndex(Graphics g, int x, int y, out TextRun run, out int runX, out bool atEndOfLine)
{
List <Paragraph> rTParagraphs = RTParagraphs;
Paragraph paragraph = null;
int num = 0;
int num2 = 0;
int num3 = 0;
int i = 0;
bool flag = true;
run = null;
runX = 0;
atEndOfLine = false;
if (rTParagraphs == null || rTParagraphs.Count == 0)
{
return(null);
}
if (y < 0)
{
y = 0;
}
for (; i < rTParagraphs.Count; i++)
{
paragraph = rTParagraphs[i];
if ((y < paragraph.OffsetY || y >= paragraph.OffsetY + paragraph.Height) && i + 1 != rTParagraphs.Count)
{
continue;
}
y -= paragraph.OffsetY;
num = TextBox.ConvertToPixels(paragraph.ParagraphProps.LeftIndent, Dpi);
num2 = TextBox.ConvertToPixels(paragraph.ParagraphProps.RightIndent, Dpi);
num3 = TextBox.ConvertToPixels(paragraph.ParagraphProps.HangingIndent, Dpi);
flag = (m_rttextbox.TextBoxProps.Direction == RPLFormat.Directions.LTR);
if (num3 < 0)
{
if (flag)
{
num -= num3;
}
else
{
num2 -= num3;
}
}
int listLevel = paragraph.ParagraphProps.ListLevel;
if (listLevel > 0)
{
int num4 = listLevel * TextBox.ConvertToPixels(10.583333f, Dpi);
if (flag)
{
num += num4;
}
else
{
num2 += num4;
}
}
break;
}
TextBoxContext paragraphAndRunIndex = GetParagraphAndRunIndex(g, paragraph, num, num2, num3, x, y, flag, i == rTParagraphs.Count - 1, out run, out runX, out atEndOfLine);
if (paragraphAndRunIndex != null)
{
paragraphAndRunIndex.ParagraphIndex = i;
}
return(paragraphAndRunIndex);
}
internal static List <Paragraph> Flow(TextBox textBox, Win32DCSafeHandle hdc, float dpiX, FontCache fontCache, FlowContext flowContext, bool keepLines, out float height)
{
if (flowContext.Height <= 0f || flowContext.Width <= 0f)
{
height = 0f;
return(null);
}
int num = TextBox.ConvertToPixels(flowContext.ContentOffset, dpiX);
int contentOffset = num;
TextBoxContext context = flowContext.Context;
RPLFormat.Directions direction = textBox.TextBoxProps.Direction;
List <Paragraph> list = new List <Paragraph>();
Win32ObjectSafeHandle win32ObjectSafeHandle = Win32.SelectObject(hdc, Win32ObjectSafeHandle.Zero);
SizeF flowContextSize;
if (!textBox.VerticalText)
{
flowContextSize = new SizeF(TextBox.ConvertToPixels(flowContext.Width, dpiX), TextBox.ConvertToPixels(flowContext.Height, dpiX));
}
else
{
flowContext.VerticalCanGrow = textBox.TextBoxProps.CanGrow;
flowContextSize = new SizeF(TextBox.ConvertToPixels(flowContext.Height, dpiX), TextBox.ConvertToPixels(flowContext.Width, dpiX));
}
fontCache.WritingMode = textBox.TextBoxProps.WritingMode;
try
{
while (context.ParagraphIndex < textBox.Paragraphs.Count)
{
Paragraph paragraph = textBox.Paragraphs[context.ParagraphIndex];
paragraph.OffsetY = num;
bool num2 = FlowParagraph(paragraph, direction, hdc, dpiX, fontCache, flowContext, keepLines, flowContextSize, ref contentOffset);
num += paragraph.Height;
if (!keepLines)
{
paragraph.TextLines = null;
}
if (!num2)
{
break;
}
list.Add(paragraph);
if ((float)num >= flowContextSize.Height)
{
if (paragraph.AtEndOfParagraph(context))
{
context.IncrementParagraph();
}
break;
}
context.IncrementParagraph();
}
if ((float)num < flowContextSize.Height)
{
flowContext.AtEndOfTextBox = true;
}
}
finally
{
if (!win32ObjectSafeHandle.IsInvalid)
{
Win32.SelectObject(hdc, win32ObjectSafeHandle).SetHandleAsInvalid();
win32ObjectSafeHandle.SetHandleAsInvalid();
}
}
height = TextBox.ConvertToMillimeters(num, dpiX);
flowContext.ContentOffset = TextBox.ConvertToMillimeters(contentOffset, dpiX);
return(list);
}
private static void FoldLineAt(TextLine line, int runIndex, int runCharIndex, TextBoxContext context, Stack <int> lineRunsIndex, Stack <int> lineRunsCharIndex)
{
TextRun textRun = line.LogicalRuns[runIndex];
for (int num = line.LogicalRuns.Count - 1; num > runIndex; num--)
{
context.TextRunIndex = lineRunsIndex.Pop();
context.TextRunCharacterIndex = lineRunsCharIndex.Pop();
line.LogicalRuns.RemoveAt(num);
}
string text = textRun.Text;
if (runCharIndex < text.Length)
{
context.TextRunCharacterIndex -= text.Length - runCharIndex;
if (textRun.Clone)
{
textRun.TerminateAt(runCharIndex);
return;
}
SCRIPT_LOGATTR[] array = new SCRIPT_LOGATTR[runCharIndex];
Array.Copy(textRun.ScriptLogAttr, 0, array, 0, array.Length);
string text2 = text.Substring(0, runCharIndex);
TextRun textRun2 = textRun.Split(text2, array);
textRun2.Clone = true;
line.LogicalRuns[runIndex] = textRun2;
}
}
private static bool FlowParagraph(Paragraph paragraph, RPLFormat.Directions direction, Win32DCSafeHandle hdc, float dpiX, FontCache fontCache, FlowContext flowContext, bool keepLines, SizeF flowContextSize, ref int contentOffset)
{
List <TextLine> list = new List <TextLine>();
TextBoxContext context = flowContext.Context;
int num = paragraph.OffsetY;
paragraph.ProcessedEmptyParagraph = false;
bool flag = false;
IParagraphProps paragraphProps = paragraph.ParagraphProps;
if (!flowContext.Updatable || !paragraph.Updated)
{
flag = (context.TextRunIndex == 0 && context.TextRunCharacterIndex == 0);
}
if (flag)
{
num += TextBox.ConvertToPixels(paragraphProps.SpaceBefore, dpiX);
if ((float)num >= flowContextSize.Height)
{
paragraph.Height = num - paragraph.OffsetY;
return(false);
}
}
int num2 = contentOffset;
float leftIndent = 0f;
float rightIndent = 0f;
float hangingIndent = 0f;
paragraph.GetParagraphIndents(direction, dpiX, out leftIndent, out rightIndent, out hangingIndent);
Stack <int> stack = null;
Stack <int> stack2 = null;
TextLine textLine = null;
while (true)
{
float num3 = leftIndent;
float num4 = rightIndent;
if (flag)
{
if (direction == RPLFormat.Directions.LTR)
{
num3 += hangingIndent;
}
else
{
num4 += hangingIndent;
}
}
stack = new Stack <int>();
stack2 = new Stack <int>();
textLine = new TextLine();
if (flag)
{
textLine.Prefix = CreateLinePrefix(paragraph, direction);
textLine.FirstLine = true;
}
if (!GetLine(paragraph, textLine, hdc, fontCache, flowContext, num3, flowContextSize.Width - num4, flowContextSize.Height - (float)num, stack, stack2, (int)(num3 + num4)))
{
if (list.Count > 0)
{
list[list.Count - 1].LastLine = true;
}
num += TextBox.ConvertToPixels(paragraphProps.SpaceAfter, dpiX);
break;
}
if (keepLines)
{
textLine.ScriptLayout(hdc, fontCache);
}
num += textLine.GetHeight(hdc, fontCache);
list.Add(textLine);
num2 = num;
if ((float)num >= flowContextSize.Height)
{
break;
}
flag = false;
}
paragraph.Height = num - paragraph.OffsetY;
if ((float)num > flowContextSize.Height)
{
if (list.Count > 0 && (float)num2 > flowContextSize.Height)
{
TextLine textLine2 = list[list.Count - 1];
int textRunIndex = 0;
int textRunCharacterIndex = 0;
while (stack.Count > 0)
{
textRunIndex = stack.Pop();
}
while (stack2.Count > 0)
{
textRunCharacterIndex = stack2.Pop();
}
if (flowContext.LineLimit)
{
context.TextRunIndex = textRunIndex;
context.TextRunCharacterIndex = textRunCharacterIndex;
list.RemoveAt(list.Count - 1);
flowContext.OmittedLineHeight = TextBox.ConvertToMillimeters(textLine2.GetHeight(hdc, fontCache), dpiX);
if (textLine2.FirstLine)
{
num2 -= TextBox.ConvertToPixels(paragraphProps.SpaceBefore, dpiX);
}
}
else
{
TextBoxContext textBoxContext = context.Clone();
textBoxContext.TextRunIndex = textRunIndex;
textBoxContext.TextRunCharacterIndex = textRunCharacterIndex;
flowContext.ClipContext = textBoxContext;
}
num2 -= textLine2.GetHeight(hdc, fontCache);
}
paragraph.AdvanceToNextRun(context, skipEmptyRuns: false);
paragraph.AdvanceToNextRun(flowContext.ClipContext, skipEmptyRuns: false);
if (list.Count > 0)
{
if (flowContext.ClipContext == null && paragraph.AtEndOfParagraph(context))
{
contentOffset = num;
}
else
{
contentOffset = num2;
}
paragraph.TextLines = list;
return(true);
}
paragraph.TextLines = null;
if (paragraph.AtEndOfParagraph(context))
{
contentOffset = num;
}
return(false);
}
paragraph.AdvanceToNextRun(context);
paragraph.TextLines = list;
contentOffset = num;
return(true);
}
internal void AdvanceToNextRun(TextBoxContext context)
{
AdvanceToNextRun(context, skipEmptyRuns: true);
}
private TextBoxContext GetParagraphAndRunIndex(Graphics g, Paragraph paragraph, int leftIndent, int rightIndent, int hangingIndent, int x, int y, bool isLTR, bool lastParagraph, out TextRun run, out int runX, out bool atEndOfLine)
{
Win32DCSafeHandle win32DCSafeHandle = null;
bool flag = false;
try
{
if (g == null)
{
flag = true;
g = Graphics.FromHwnd(IntPtr.Zero);
}
win32DCSafeHandle = new Win32DCSafeHandle(g.GetHdc(), ownsHandle: false);
runX = x;
run = null;
atEndOfLine = false;
for (int i = 0; i < paragraph.TextLines.Count; i++)
{
TextLine textLine = paragraph.TextLines[i];
y -= textLine.GetHeight(win32DCSafeHandle, FontCache);
if (textLine.FirstLine)
{
y -= TextBox.ConvertToPixels(paragraph.ParagraphProps.SpaceBefore, Dpi);
}
else if (textLine.LastLine)
{
y -= TextBox.ConvertToPixels(paragraph.ParagraphProps.SpaceAfter, Dpi);
}
if (y >= 0 && i + 1 != paragraph.TextLines.Count)
{
continue;
}
int width = textLine.GetWidth(win32DCSafeHandle, FontCache);
if (x > WidthInPX)
{
atEndOfLine = (width > 0);
run = GetLastNonLineBreakRun(textLine.LogicalRuns, out int charIndex, out bool hasNonCRLFChars);
TextBoxContext textBoxContext = new TextBoxContext();
textBoxContext.TextRunIndex = run.TextRunProperties.IndexInParagraph;
if (hasNonCRLFChars && run.CharacterCount > 0)
{
textBoxContext.TextRunCharacterIndex = run.CharacterIndexInOriginal + charIndex + 1;
}
else
{
textBoxContext.TextRunCharacterIndex = run.CharacterIndexInOriginal;
}
run = null;
return(textBoxContext);
}
if (x < 0)
{
atEndOfLine = false;
run = GetFirstNonLineBreakRun(textLine.LogicalRuns, out int charIndex2);
TextBoxContext result = new TextBoxContext
{
TextRunIndex = run.TextRunProperties.IndexInParagraph,
TextRunCharacterIndex = run.CharacterIndexInOriginal + charIndex2
};
run = null;
return(result);
}
RPLFormat.TextAlignments textAlignments = paragraph.ParagraphProps.Alignment;
if (textAlignments == RPLFormat.TextAlignments.General)
{
textAlignments = m_rttextbox.TextBoxProps.DefaultAlignment;
if (!isLTR)
{
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:
runX = x - (leftIndent + (WidthInPX - leftIndent - rightIndent) / 2 - width / 2);
break;
case RPLFormat.TextAlignments.Right:
runX = x - (WidthInPX - width - rightIndent);
break;
default:
runX = x - leftIndent;
break;
}
if (textLine.FirstLine && hangingIndent != 0)
{
if (isLTR)
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Left:
runX -= hangingIndent;
break;
case RPLFormat.TextAlignments.Center:
runX -= hangingIndent / 2;
break;
}
}
else
{
switch (textAlignments)
{
case RPLFormat.TextAlignments.Right:
runX += hangingIndent;
break;
case RPLFormat.TextAlignments.Center:
runX += hangingIndent / 2;
break;
}
}
}
runX = Math.Max(0, runX);
return(GetParagraphAndRunIndex(win32DCSafeHandle, paragraph, textLine, x, width, lastParagraph, out run, ref runX, out atEndOfLine));
}
return(null);
}
finally
{
if (!win32DCSafeHandle.IsInvalid)
{
g.ReleaseHdc();
}
if (flag)
{
g.Dispose();
g = null;
}
}
}
internal CaretInfo MapLocation(Graphics g, TextBoxContext location)
{
return(MapLocation(g, location, moveCaretToNextLine: false));
}
internal RTSelectionHighlight(TextBoxContext Start, TextBoxContext End, Color Color)
{
m_selectionStart = Start;
m_selectionEnd = End;
m_color = Color;
}