public VisualPointInfo GetTextPointInfoFromCaretPoint(int caretX)
{
int accTextRunWidth = 0; int accTextRunCharCount = 0;
EditableRun lastestTextRun = null;
foreach (EditableRun t in this._runs)
{
lastestTextRun = t;
int thisTextRunWidth = t.Width;
if (accTextRunWidth + thisTextRunWidth > caretX)
{
EditableRunCharLocation localPointInfo = t.GetCharacterFromPixelOffset(caretX - thisTextRunWidth);
EditableVisualPointInfo pointInfo =
new EditableVisualPointInfo(this, accTextRunCharCount + localPointInfo.RunCharIndex);
pointInfo.SetAdditionVisualInfo(t, accTextRunCharCount, caretX, accTextRunWidth);
return(pointInfo);
}
else
{
accTextRunWidth += thisTextRunWidth;
accTextRunCharCount += t.CharacterCount;
}
}
if (lastestTextRun != null)
{
return(null);
}
else
{
EditableVisualPointInfo pInfo = new EditableVisualPointInfo(this, -1);
pInfo.SetAdditionVisualInfo(null, accTextRunCharCount, caretX, accTextRunWidth);
return(pInfo);
}
}
/// <summary>
/// try set caret x pos to nearest request value
/// </summary>
/// <param name="value"></param>
public void TrySetCaretXPos(int value)
{
if (currentTextRun == null)
{
caret_char_index = 0;
caretXPos = 0;
rCharOffset = 0;
rPixelOffset = 0;
return;
}
int pixDiff = value - caretXPos;
if (pixDiff > 0)
{
do
{
int thisTextRunPixelLength = currentTextRun.Width;
if (rPixelOffset + thisTextRunPixelLength > value)
{
EditableRunCharLocation foundLocation = EditableRun.InnerGetCharacterFromPixelOffset(currentTextRun, value - rPixelOffset);
caretXPos = rPixelOffset + foundLocation.pixelOffset;
caret_char_index = rCharOffset + foundLocation.RunCharIndex;
//if (foundLocation.charIndex == -1)
//{
// if (!(MoveToPreviousTextRun()))
// {
// caretXPos = 0;
// caret_char_index = 0;
// }
//}
//else
//{
// caretXPos = rPixelOffset + foundLocation.pixelOffset;
// caret_char_index = rCharOffset + foundLocation.charIndex;
//}
return;
}
} while (MoveToNextTextRun());
//to the last
caretXPos = rPixelOffset + currentTextRun.Width;
caret_char_index = rCharOffset + currentTextRun.CharacterCount;
return;
}
else if (pixDiff < 0)
{
do
{
if (value >= rPixelOffset)
{
EditableRunCharLocation foundLocation = EditableRun.InnerGetCharacterFromPixelOffset(currentTextRun, value - rPixelOffset);
caretXPos = rPixelOffset + foundLocation.pixelOffset;
caret_char_index = rCharOffset + foundLocation.RunCharIndex;
//if (foundLocation.charIndex == -1)
//{
// if (!MoveToPreviousTextRun())
// {
// caret_char_index = 0;
// caretXPos = 0;
// }
//}
//else
//{
// caretXPos = rPixelOffset + foundLocation.pixelOffset;
// caret_char_index = rCharOffset + foundLocation.RunCharIndex;
//}
return;
}
} while (MoveToPreviousTextRun());//
caretXPos = 0;
caret_char_index = 0;
return;
}
}
