| public abstract GetRunWidth ( int charOffset ) : int | ||
| charOffset | int | |
| return | int | |
public EditableVisualPointInfo GetTextPointInfoFromCharIndex(int charIndex)
{
int limit = CharCount - 1;
if (charIndex > limit)
{
charIndex = limit;
}
EditableVisualPointInfo textPointInfo = new EditableVisualPointInfo(this, charIndex);
int rCharOffset = 0;
int rPixelOffset = 0;
EditableRun lastestRun = null;
foreach (EditableRun r in this)
{
lastestRun = r;
int thisCharCount = lastestRun.CharacterCount;
if (thisCharCount + rCharOffset > charIndex)
{
int localCharOffset = charIndex - rCharOffset;
int pixelOffset = lastestRun.GetRunWidth(localCharOffset);
textPointInfo.SetAdditionVisualInfo(lastestRun,
localCharOffset, rPixelOffset + pixelOffset
, rPixelOffset);
return(textPointInfo);
}
else
{
rCharOffset += thisCharCount;
rPixelOffset += r.Width;
}
}
textPointInfo.SetAdditionVisualInfo(lastestRun, rCharOffset - lastestRun.CharacterCount, rPixelOffset, rPixelOffset - lastestRun.Width);
return(textPointInfo);
}
bool MoveToNextTextRun()
{
#if DEBUG
if (currentTextRun.IsLineBreak)
{
throw new NotSupportedException();
}
#endif
EditableRun nextTextRun = currentTextRun.NextTextRun;
if (nextTextRun != null && !nextTextRun.IsLineBreak)
{
rCharOffset += currentTextRun.CharacterCount;
rPixelOffset += currentTextRun.Width;
currentTextRun = nextTextRun;
caret_char_index = rCharOffset;
caretXPos = rPixelOffset + currentTextRun.GetRunWidth(0);
return(true);
}
return(false);
}
public void SetCurrentCharIndex(int newCharIndexPointTo)
{
#if DEBUG
if (dbugTextManRecorder != null)
{
dbugTextManRecorder.WriteInfo("TextLineReader::CharIndex_set=" + newCharIndexPointTo);
dbugTextManRecorder.BeginContext();
}
#endif
if (newCharIndexPointTo < 0 || newCharIndexPointTo > currentLine.CharCount)
{
throw new NotSupportedException("index out of range");
}
if (newCharIndexPointTo == 0)
{
caret_char_index = 0;
caretXPos = 0;
rCharOffset = 0;
rPixelOffset = 0;
currentTextRun = currentLine.FirstRun;
}
else
{
int diff = newCharIndexPointTo - caret_char_index;
switch (diff)
{
case 0:
{
return;
}
default:
{
if (diff > 0)
{
do
{
if (rCharOffset + currentTextRun.CharacterCount > newCharIndexPointTo)
{
caret_char_index = newCharIndexPointTo;
caretXPos = rPixelOffset + currentTextRun.GetRunWidth(caret_char_index - rCharOffset);
#if DEBUG
if (dbugTextManRecorder != null)
{
dbugTextManRecorder.EndContext();
}
#endif
return;
}
} while (MoveToNextTextRun());
caret_char_index = rCharOffset + currentTextRun.CharacterCount;
caretXPos = rPixelOffset + currentTextRun.Width;
return;
}
else
{
do
{
if (rCharOffset - 1 < newCharIndexPointTo)
{
caret_char_index = newCharIndexPointTo;
caretXPos = rPixelOffset + currentTextRun.GetRunWidth(caret_char_index - rCharOffset);
#if DEBUG
if (dbugTextManRecorder != null)
{
dbugTextManRecorder.EndContext();
}
#endif
return;
}
} while (MoveToPreviousTextRun());
caret_char_index = 0;
caretXPos = 0;
}
}
break;
}
}
#if DEBUG
if (dbugTextManRecorder != null)
{
dbugTextManRecorder.EndContext();
}
#endif
}
bool MoveToNextTextRun()
{
#if DEBUG
if (currentTextRun.IsLineBreak)
{
throw new NotSupportedException();
}
#endif
EditableRun nextTextRun = currentTextRun.NextTextRun;
if (nextTextRun != null && !nextTextRun.IsLineBreak)
{
rCharOffset += currentTextRun.CharacterCount;
rPixelOffset += currentTextRun.Width;
currentTextRun = nextTextRun;
charIndex = rCharOffset;
caretXPos = rPixelOffset + currentTextRun.GetRunWidth(0);
return true;
}
return false;
}
