// static
void
nsTextEditRules::HandleNewLines(nsString &aString,
PRInt32 aNewlineHandling)
{
if (aNewlineHandling < 0) {
PRInt32 caretStyle;
nsPlaintextEditor::GetDefaultEditorPrefs(aNewlineHandling, caretStyle);
}
switch(aNewlineHandling)
{
case nsIPlaintextEditor::eNewlinesReplaceWithSpaces:
// Strip trailing newlines first so we don't wind up with trailing spaces
aString.Trim(CRLF, false, true);
aString.ReplaceChar(CRLF, ' ');
break;
case nsIPlaintextEditor::eNewlinesStrip:
aString.StripChars(CRLF);
break;
case nsIPlaintextEditor::eNewlinesPasteToFirst:
default:
{
PRInt32 firstCRLF = aString.FindCharInSet(CRLF);
// we get first *non-empty* line.
PRInt32 offset = 0;
while (firstCRLF == offset)
{
offset++;
firstCRLF = aString.FindCharInSet(CRLF, offset);
}
if (firstCRLF > 0)
aString.Truncate(firstCRLF);
if (offset > 0)
aString.Cut(0, offset);
}
break;
case nsIPlaintextEditor::eNewlinesReplaceWithCommas:
aString.Trim(CRLF, true, true);
aString.ReplaceChar(CRLF, ',');
break;
case nsIPlaintextEditor::eNewlinesStripSurroundingWhitespace:
{
// find each newline, and strip all the whitespace before
// and after it
PRInt32 firstCRLF = aString.FindCharInSet(CRLF);
while (firstCRLF >= 0)
{
PRUint32 wsBegin = firstCRLF, wsEnd = firstCRLF + 1;
// look backwards for the first non-whitespace char
while (wsBegin > 0 && NS_IS_SPACE(aString[wsBegin - 1]))
--wsBegin;
while (wsEnd < aString.Length() && NS_IS_SPACE(aString[wsEnd]))
++wsEnd;
// now cut this range out of the string
aString.Cut(wsBegin, wsEnd - wsBegin);
// look for another CR or LF
firstCRLF = aString.FindCharInSet(CRLF);
}
}
break;
case nsIPlaintextEditor::eNewlinesPasteIntact:
// even if we're pasting newlines, don't paste leading/trailing ones
aString.Trim(CRLF, true, true);
break;
}
}
// static
void
nsTextEditRules::HandleNewLines(nsString &aString,
int32_t aNewlineHandling)
{
if (aNewlineHandling < 0) {
int32_t caretStyle;
nsPlaintextEditor::GetDefaultEditorPrefs(aNewlineHandling, caretStyle);
}
switch(aNewlineHandling)
{
case nsIPlaintextEditor::eNewlinesReplaceWithSpaces:
// Strip trailing newlines first so we don't wind up with trailing spaces
aString.Trim(CRLF, false, true);
aString.ReplaceChar(CRLF, ' ');
break;
case nsIPlaintextEditor::eNewlinesStrip:
aString.StripChars(CRLF);
break;
case nsIPlaintextEditor::eNewlinesPasteToFirst:
default:
{
int32_t firstCRLF = aString.FindCharInSet(CRLF);
// we get first *non-empty* line.
int32_t offset = 0;
while (firstCRLF == offset)
{
offset++;
firstCRLF = aString.FindCharInSet(CRLF, offset);
}
if (firstCRLF > 0)
aString.Truncate(firstCRLF);
if (offset > 0)
aString.Cut(0, offset);
}
break;
case nsIPlaintextEditor::eNewlinesReplaceWithCommas:
aString.Trim(CRLF, true, true);
aString.ReplaceChar(CRLF, ',');
break;
case nsIPlaintextEditor::eNewlinesStripSurroundingWhitespace:
{
nsString result;
uint32_t offset = 0;
while (offset < aString.Length())
{
int32_t nextCRLF = aString.FindCharInSet(CRLF, offset);
if (nextCRLF < 0) {
result.Append(nsDependentSubstring(aString, offset));
break;
}
uint32_t wsBegin = nextCRLF;
// look backwards for the first non-whitespace char
while (wsBegin > offset && NS_IS_SPACE(aString[wsBegin - 1]))
--wsBegin;
result.Append(nsDependentSubstring(aString, offset, wsBegin - offset));
offset = nextCRLF + 1;
while (offset < aString.Length() && NS_IS_SPACE(aString[offset]))
++offset;
}
aString = result;
}
break;
case nsIPlaintextEditor::eNewlinesPasteIntact:
// even if we're pasting newlines, don't paste leading/trailing ones
aString.Trim(CRLF, true, true);
break;
}
}