internal void Remove(int lineId)
{
#if DEBUG
if (lineId < 0)
{
throw new NotSupportedException();
}
#endif
if ((layerFlags & FLOWLAYER_HAS_MULTILINE) == 0)
{
return;
}
List <EditableTextLine> lines = (List <EditableTextLine>)lineCollection;
if (lines.Count < 2)
{
return;
}
EditableTextLine tobeRemovedLine = lines[lineId];
tobeRemovedLine.editableFlowLayer = null;
int cy = tobeRemovedLine.Top;
lines.RemoveAt(lineId); int j = lines.Count;
for (int i = lineId; i < j; ++i)
{
EditableTextLine line = lines[i];
line.SetTop(cy); line.SetLineNumber(i); cy += line.ActualLineHeight;
}
if (lines.Count == 1)
{
lineCollection = lines[0];
FlowLayerHasMultiLines = false;
}
}
void AppendLine(EditableTextLine line)
{
if ((layerFlags & FLOWLAYER_HAS_MULTILINE) != 0)
{
List <EditableTextLine> lines = (List <EditableTextLine>)lineCollection;
int lineCount = lines.Count;
EditableTextLine lastLine = lines[lineCount - 1];
line.SetLineNumber(lineCount);
line.SetTop(lastLine.Top + lastLine.ActualLineHeight);
lines.Add(line);
}
else
{
EditableTextLine onlyLine = (EditableTextLine)lineCollection;
List <EditableTextLine> newLineList = new List <EditableTextLine>();
newLineList.Add(onlyLine);
line.SetTop(onlyLine.ActualLineHeight);
line.SetLineNumber(1);
newLineList.Add(line);
lineCollection = newLineList;
FlowLayerHasMultiLines = true;
}
}
void InsertLine(int insertAt, EditableTextLine textLine)
{
if (insertAt < 0)
{
throw new NotSupportedException();
}
List <EditableTextLine> lines = lineCollection as List <EditableTextLine>;
if (lines != null)
{
int j = lines.Count;
if (insertAt > j - 1)
{
AppendLine(textLine);
}
else
{
EditableTextLine line = lines[insertAt];
int cy = line.Top;
textLine.SetTop(cy);
textLine.SetLineNumber(insertAt);
cy += line.ActualLineHeight;
for (int i = insertAt; i < j; i++)
{
line = lines[i];
line.SetTop(cy);
line.SetLineNumber(i + 1);
cy += line.ActualLineHeight;
}
textLine.editableFlowLayer = this;
lines.Insert(insertAt, textLine);
}
}
else
{
lines = new List <EditableTextLine>();
lines.Add((EditableTextLine)lineCollection);
lineCollection = lines;
FlowLayerHasMultiLines = true;
int j = lines.Count;
if (insertAt > j - 1)
{
AppendLine(textLine);
}
else
{
EditableTextLine line = lines[insertAt];
int cy = line.Top;
textLine.SetTop(cy);
textLine.SetLineNumber(insertAt);
cy += line.ActualLineHeight;
for (int i = insertAt; i < j; i++)
{
line = lines[i];
line.SetTop(cy);
line.SetLineNumber(i + 1);
cy += line.ActualLineHeight;
}
textLine.editableFlowLayer = this;
lines.Insert(insertAt, textLine);
}
}
}
void InsertLine(int insertAt, EditableTextLine textLine)
{
if (insertAt < 0)
{
throw new NotSupportedException();
}
List<EditableTextLine> lines = lineCollection as List<EditableTextLine>;
if (lines != null)
{
int j = lines.Count;
if (insertAt > j - 1)
{
AppendLine(textLine);
}
else
{
EditableTextLine line = lines[insertAt];
int cy = line.Top;
textLine.SetTop(cy);
textLine.SetLineNumber(insertAt);
cy += line.ActualLineHeight;
for (int i = insertAt; i < j; i++)
{
line = lines[i];
line.SetTop(cy);
line.SetLineNumber(i + 1);
cy += line.ActualLineHeight;
}
textLine.editableFlowLayer = this;
lines.Insert(insertAt, textLine);
}
}
else
{
lines = new List<EditableTextLine>();
lines.Add((EditableTextLine)lineCollection);
lineCollection = lines;
FlowLayerHasMultiLines = true;
int j = lines.Count;
if (insertAt > j - 1)
{
AppendLine(textLine);
}
else
{
EditableTextLine line = lines[insertAt];
int cy = line.Top;
textLine.SetTop(cy);
textLine.SetLineNumber(insertAt);
cy += line.ActualLineHeight;
for (int i = insertAt; i < j; i++)
{
line = lines[i];
line.SetTop(cy);
line.SetLineNumber(i + 1);
cy += line.ActualLineHeight;
}
textLine.editableFlowLayer = this;
lines.Insert(insertAt, textLine);
}
}
}
void AppendLine(EditableTextLine line)
{
if ((layerFlags & FLOWLAYER_HAS_MULTILINE) != 0)
{
List<EditableTextLine> lines = (List<EditableTextLine>)lineCollection;
int lineCount = lines.Count;
EditableTextLine lastLine = lines[lineCount - 1];
line.SetLineNumber(lineCount);
line.SetTop(lastLine.Top + lastLine.ActualLineHeight);
lines.Add(line);
}
else
{
EditableTextLine onlyLine = (EditableTextLine)lineCollection;
List<EditableTextLine> newLineList = new List<EditableTextLine>();
newLineList.Add(onlyLine);
line.SetTop(onlyLine.ActualLineHeight);
line.SetLineNumber(1);
newLineList.Add(line);
lineCollection = newLineList;
FlowLayerHasMultiLines = true;
}
}
