static size_t linebreak(const char text[], const char stop[], const SkPaint& paint, SkScalar margin)
{
const char* start = text;
SkAutoGlyphCache ac(paint, NULL);
SkGlyphCache* cache = ac.getCache();
SkFixed w = 0;
SkFixed limit = SkScalarToFixed(margin);
SkAutoKern autokern;
const char* word_start = text;
int prevWS = true;
while (text < stop)
{
const char* prevText = text;
SkUnichar uni = SkUTF8_NextUnichar(&text);
int currWS = is_ws(uni);
const SkGlyph& glyph = cache->getUnicharMetrics(uni);
if (!currWS && prevWS)
word_start = prevText;
prevWS = currWS;
w += autokern.adjust(glyph) + glyph.fAdvanceX;
if (w > limit)
{
if (currWS) // eat the rest of the whitespace
{
while (text < stop && is_ws(SkUTF8_ToUnichar(text)))
text += SkUTF8_CountUTF8Bytes(text);
}
else // backup until a whitespace (or 1 char)
{
if (word_start == start)
{
if (prevText > start)
text = prevText;
}
else
text = word_start;
}
break;
}
}
return text - start;
}
static size_t linebreak(const char text[], const char stop[],
const SkPaint& paint, SkScalar margin,
size_t* trailing = nullptr)
{
size_t lengthBreak = paint.breakText(text, stop - text, margin);
//Check for white space or line breakers before the lengthBreak
const char* start = text;
const char* word_start = text;
int prevWS = true;
if (trailing) {
*trailing = 0;
}
while (text < stop) {
const char* prevText = text;
SkUnichar uni = SkUTF8_NextUnichar(&text);
int currWS = is_ws(uni);
if (!currWS && prevWS) {
word_start = prevText;
}
prevWS = currWS;
if (text > start + lengthBreak) {
if (currWS) {
// eat the rest of the whitespace
while (text < stop && is_ws(SkUTF8_ToUnichar(text))) {
text += SkUTF8_CountUTF8Bytes(text);
}
if (trailing) {
*trailing = text - prevText;
}
} else {
// backup until a whitespace (or 1 char)
if (word_start == start) {
if (prevText > start) {
text = prevText;
}
} else {
text = word_start;
}
}
break;
}
if ('\n' == uni) {
size_t ret = text - start;
size_t lineBreakSize = 1;
if (text < stop) {
uni = SkUTF8_NextUnichar(&text);
if ('\r' == uni) {
ret = text - start;
++lineBreakSize;
}
}
if (trailing) {
*trailing = lineBreakSize;
}
return ret;
}
if ('\r' == uni) {
size_t ret = text - start;
size_t lineBreakSize = 1;
if (text < stop) {
uni = SkUTF8_NextUnichar(&text);
if ('\n' == uni) {
ret = text - start;
++lineBreakSize;
}
}
if (trailing) {
*trailing = lineBreakSize;
}
return ret;
}
}
return text - start;
}
