private void BackspaceDeleteLineBreak()
{
if (Hookup is StringHookup || Hookup is TssHookup)
{
IParagraphOperations paragraphOps;
GroupHookup parentHookup;
int index;
if (!GetParagraphOps(out paragraphOps, out parentHookup, out index))
{
return;
}
if (index == 0)
{
// at the start of the sequence.
// Enhance JohnT: could look for another paragraph ops higher? additional interface on paragraphOps?
return;
}
var prevItem = parentHookup.Children[index - 1];
var prevIp = prevItem.SelectAtEnd();
if (prevIp == null)
{
return; // for some reason we can't do it (maybe a box at end of last para?)
}
var range = new RangeSelection(prevIp, this);
Action makeSelection;
paragraphOps.InsertString(range, "", out makeSelection);
RootBox.Site.PerformAfterNotifications(makeSelection);
}
}
public RangeSelection ExpandToWord()
{
var cpe = LgIcuCharPropEngineClass.Create();
RangeSelection rangeSel = new RangeSelection(this, new InsertionPoint(Hookup, StringPosition + 1, AssociatePrevious));
var backwardSel = new InsertionPoint(Hookup, StringPosition, AssociatePrevious);
var forwardSel = new InsertionPoint(Hookup, StringPosition, AssociatePrevious);
while (true)
{
if (backwardSel.StringPosition == 0)
{
break;
}
backwardSel.StringPosition--;
char testChar = backwardSel.ContainingRun.Text[backwardSel.StringPosition];
int testInt = testChar;
if (Surrogates.IsTrailSurrogate(testChar))
{
backwardSel.StringPosition--;
testInt = Surrogates.Int32FromSurrogates(backwardSel.ContainingRun.Text[backwardSel.StringPosition], testChar);
}
else if (Surrogates.IsLeadSurrogate(testChar))
{
testInt = Surrogates.Int32FromSurrogates(testChar, backwardSel.ContainingRun.Text[backwardSel.StringPosition + 1]);
}
if (!cpe.get_IsNumber(testInt) && !cpe.get_IsWordForming(testInt) ||
backwardSel.ContainingRun.WritingSystemAt(backwardSel.StringPosition) != ContainingRun.WritingSystemAt(StringPosition))
{
backwardSel.StringPosition++;
break;
}
rangeSel = new RangeSelection(backwardSel, this);
}
backwardSel = rangeSel.Anchor;
while (true)
{
if (forwardSel.StringPosition == forwardSel.ContainingRun.Length)
{
if (backwardSel.StringPosition == forwardSel.StringPosition)
{
return(null);
}
break;
}
char testChar = forwardSel.ContainingRun.Text[forwardSel.StringPosition];
int testInt = testChar;
if (Surrogates.IsLeadSurrogate(testChar))
{
forwardSel.StringPosition++;
testInt = Surrogates.Int32FromSurrogates(testChar, forwardSel.ContainingRun.Text[forwardSel.StringPosition]);
testChar = (char)testInt;
}
else if (Surrogates.IsTrailSurrogate(testChar))
{
testInt = Surrogates.Int32FromSurrogates(forwardSel.ContainingRun.Text[forwardSel.StringPosition - 1], testChar);
testChar = (char)testInt;
}
if (!cpe.get_IsNumber(testInt) && !cpe.get_IsWordForming(testInt) ||
forwardSel.ContainingRun.WritingSystemAt(forwardSel.StringPosition) != ContainingRun.WritingSystemAt(StringPosition))
{
if (testChar.Equals(" ".ToCharArray()[0]))
{
forwardSel.StringPosition++;
rangeSel = new RangeSelection(backwardSel, forwardSel);
}
break;
}
forwardSel.StringPosition++;
rangeSel = new RangeSelection(backwardSel, forwardSel);
}
return(rangeSel);
}
public RangeRestoreData(RangeSelection rangeSelection)
{
StartRestoreData = new InsertionPointRestoreData(rangeSelection.Start);
EndRestoreData = new InsertionPointRestoreData(rangeSelection.End);
}