// FIXME: Can't really do this work without taking whitespace mode into account.
// This means that eventually this function needs to be eliminated or at least have
// its parameters changed because it can't do its work on the string without knowing
// what parts are in what whitespace mode.
DeprecatedString convertHTMLTextToInterchangeFormat(const DeprecatedString &in)
{
DeprecatedString s;
unsigned int i = 0;
unsigned int consumed = 0;
while (i < in.length()) {
consumed = 1;
if (isCollapsibleWhitespace(in[i].unicode())) {
// count number of adjoining spaces
unsigned int j = i + 1;
while (j < in.length() && isCollapsibleWhitespace(in[j].unicode()))
j++;
unsigned int count = j - i;
consumed = count;
while (count) {
unsigned int add = count % 3;
switch (add) {
case 0:
s += convertedSpaceString();
s += ' ';
s += convertedSpaceString();
add = 3;
break;
case 1:
if (i == 0 || i + 1 == in.length()) // at start or end of string
s += convertedSpaceString();
else
s += ' ';
break;
case 2:
if (i == 0) {
// at start of string
s += convertedSpaceString();
s += ' ';
}
else if (i + 2 == in.length()) {
// at end of string
s += convertedSpaceString();
s += convertedSpaceString();
}
else {
s += convertedSpaceString();
s += ' ';
}
break;
}
count -= add;
}
}
else {
s += in[i];
}
i += consumed;
}
return s;
}
String convertHTMLTextToInterchangeFormat(const String& in, const Text* node)
{
// Assume all the text comes from node.
if (node->renderer() && node->renderer()->style()->preserveNewline())
return in;
Vector<UChar> s;
unsigned i = 0;
unsigned consumed = 0;
while (i < in.length()) {
consumed = 1;
if (isCollapsibleWhitespace(in[i])) {
// count number of adjoining spaces
unsigned j = i + 1;
while (j < in.length() && isCollapsibleWhitespace(in[j]))
j++;
unsigned count = j - i;
consumed = count;
while (count) {
unsigned add = count % 3;
switch (add) {
case 0:
append(s, convertedSpaceString());
s.append(' ');
append(s, convertedSpaceString());
add = 3;
break;
case 1:
if (i == 0 || i + 1 == in.length()) // at start or end of string
append(s, convertedSpaceString());
else
s.append(' ');
break;
case 2:
if (i == 0) {
// at start of string
append(s, convertedSpaceString());
s.append(' ');
} else if (i + 2 == in.length()) {
// at end of string
append(s, convertedSpaceString());
append(s, convertedSpaceString());
} else {
append(s, convertedSpaceString());
s.append(' ');
}
break;
}
count -= add;
}
} else
s.append(in[i]);
i += consumed;
}
return String::adopt(s);
}
String convertHTMLTextToInterchangeFormat(const String& in, const Text& node)
{
// Assume all the text comes from node.
if (node.layoutObject() && node.layoutObject()->style()->preserveNewline())
return in;
const char convertedSpaceString[] = "<span class=\"" AppleConvertedSpace "\">\xA0</span>";
static_assert((static_cast<unsigned char>('\xA0') == noBreakSpaceCharacter), "\\xA0 should be non-breaking space");
StringBuilder s;
unsigned i = 0;
unsigned consumed = 0;
while (i < in.length()) {
consumed = 1;
if (isCollapsibleWhitespace(in[i])) {
// count number of adjoining spaces
unsigned j = i + 1;
while (j < in.length() && isCollapsibleWhitespace(in[j]))
j++;
unsigned count = j - i;
consumed = count;
while (count) {
unsigned add = count % 3;
switch (add) {
case 0:
s.append(convertedSpaceString);
s.append(' ');
s.append(convertedSpaceString);
add = 3;
break;
case 1:
if (i == 0 || i + 1 == in.length()) // at start or end of string
s.append(convertedSpaceString);
else
s.append(' ');
break;
case 2:
if (i == 0) {
// at start of string
s.append(convertedSpaceString);
s.append(' ');
} else if (i + 2 == in.length()) {
// at end of string
s.append(convertedSpaceString);
s.append(convertedSpaceString);
} else {
s.append(convertedSpaceString);
s.append(' ');
}
break;
}
count -= add;
}
} else {
s.append(in[i]);
}
i += consumed;
}
return s.toString();
}
Position Position::trailingWhitespacePosition(EAffinity affinity, bool considerNonCollapsibleWhitespace) const
{
if (isNull())
return Position();
if (node()->isTextNode()) {
TextImpl *textNode = static_cast<TextImpl *>(node());
if (offset() < (long)textNode->length()) {
DOMString string = static_cast<TextImpl *>(node())->data();
const QChar &c = string[offset()];
if (considerNonCollapsibleWhitespace ? (c.isSpace() || c.unicode() == 0xa0) : isCollapsibleWhitespace(c))
return *this;
return Position();
}
}
if (downstream(StayInBlock).node()->id() == ID_BR)
return Position();
Position next = nextCharacterPosition(affinity);
if (next != *this && next.node()->inSameContainingBlockFlowElement(node()) && next.node()->isTextNode()) {
DOMString string = static_cast<TextImpl *>(next.node())->data();
const QChar &c = string[0];
if (considerNonCollapsibleWhitespace ? (c.isSpace() || c.unicode() == 0xa0) : isCollapsibleWhitespace(c))
return next;
}
return Position();
}
Position Position::leadingWhitespacePosition(EAffinity affinity, bool considerNonCollapsibleWhitespace) const
{
if (isNull())
return Position();
if (upstream(StayInBlock).node()->id() == ID_BR)
return Position();
Position prev = previousCharacterPosition(affinity);
if (prev != *this && prev.node()->inSameContainingBlockFlowElement(node()) && prev.node()->isTextNode()) {
DOMString string = static_cast<TextImpl *>(prev.node())->data();
const QChar &c = string[prev.offset()];
if (considerNonCollapsibleWhitespace ? (c.isSpace() || c.unicode() == 0xa0) : isCollapsibleWhitespace(c))
return prev;
}
return Position();
}
