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);
}
else
{
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;
}
}
}
public TextRun GetSubRunForLine(TextBoxContext context, ref bool newLine)
{
this.AdvanceToNextRun(context);
if (context.TextRunIndex < this.m_runs.Count)
{
TextRun textRun = this.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);
}
