bool Label::multilineTextWrapByWord()
{
int textLen = getStringLength();
int lineIndex = 0;
float nextWordX = 0.f;
float nextWordY = 0.f;
float longestLine = 0.f;
float letterRight = 0.f;
auto contentScaleFactor = CC_CONTENT_SCALE_FACTOR();
float highestY = 0.f;
float lowestY = 0.f;
FontLetterDefinition letterDef;
Vec2 letterPosition;
for (int index = 0; index < textLen; )
{
auto character = _utf16Text[index];
if (character == '\n')
{
_linesWidth.push_back(letterRight);
letterRight = 0.f;
lineIndex++;
nextWordX = 0.f;
nextWordY -= _lineHeight;
recordPlaceholderInfo(index, character);
index++;
continue;
}
auto wordLen = getFirstWordLen(_utf16Text, index, textLen);
float wordHighestY = highestY;;
float wordLowestY = lowestY;
float wordRight = letterRight;
float nextLetterX = nextWordX;
bool newLine = false;
for (int tmp = 0; tmp < wordLen;++tmp)
{
int letterIndex = index + tmp;
character = _utf16Text[letterIndex];
if (_fontAtlas->getLetterDefinitionForChar(character, letterDef) == false)
{
recordPlaceholderInfo(letterIndex, character);
CCLOG("LabelTextFormatter error:can't find letter definition in font file for letter: %c", character);
continue;
}
auto letterX = (nextLetterX + letterDef.offsetX) / contentScaleFactor;
if (_maxLineWidth > 0.f && nextWordX > 0.f && letterX + letterDef.width > _maxLineWidth)
{
_linesWidth.push_back(letterRight);
letterRight = 0.f;
lineIndex++;
nextWordX = 0.f;
nextWordY -= _lineHeight;
newLine = true;
break;
}
else
{
letterPosition.x = letterX;
}
letterPosition.y = (nextWordY - letterDef.offsetY) / contentScaleFactor;
recordLetterInfo(letterPosition, character, letterIndex, lineIndex);
if (_horizontalKernings && letterIndex < textLen - 1)
nextLetterX += _horizontalKernings[letterIndex + 1];
nextLetterX += letterDef.xAdvance + _additionalKerning;
wordRight = letterPosition.x + letterDef.width;
if (wordHighestY < letterPosition.y)
wordHighestY = letterPosition.y;
if (wordLowestY > letterPosition.y - letterDef.height)
wordLowestY = letterPosition.y - letterDef.height;
}
if (newLine)
{
continue;
}
nextWordX = nextLetterX;
letterRight = wordRight;
if (highestY < wordHighestY)
highestY = wordHighestY;
if (lowestY > wordLowestY)
lowestY = wordLowestY;
if (longestLine < letterRight)
longestLine = letterRight;
index += wordLen;
}
_linesWidth.push_back(letterRight);
_numberOfLines = lineIndex + 1;
_textDesiredHeight = (_numberOfLines * _lineHeight) / contentScaleFactor;
Size contentSize(_labelWidth, _labelHeight);
if (_labelWidth <= 0.f)
contentSize.width = longestLine;
if (_labelHeight <= 0.f)
contentSize.height = _textDesiredHeight;
setContentSize(contentSize);
_tailoredTopY = contentSize.height;
_tailoredBottomY = 0.f;
if (highestY > 0.f)
_tailoredTopY = contentSize.height + highestY;
if (lowestY < -_textDesiredHeight)
_tailoredBottomY = _textDesiredHeight + lowestY;
return true;
}
bool Label::multilineTextWrap(const std::function<int(const std::u16string&, int, int)>& nextTokenLen)
{
int textLen = getStringLength();
int lineIndex = 0;
float nextTokenX = 0.f;
float nextTokenY = 0.f;
float longestLine = 0.f;
float letterRight = 0.f;
auto contentScaleFactor = CC_CONTENT_SCALE_FACTOR();
float lineSpacing = _lineSpacing * contentScaleFactor;
float highestY = 0.f;
float lowestY = 0.f;
FontLetterDefinition letterDef;
Vec2 letterPosition;
bool nextChangeSize = true;
this->updateBMFontScale();
for (int index = 0; index < textLen; )
{
auto character = _utf16Text[index];
if (character == (char16_t)TextFormatter::NewLine)
{
_linesWidth.push_back(letterRight);
letterRight = 0.f;
lineIndex++;
nextTokenX = 0.f;
nextTokenY -= _lineHeight*_bmfontScale + lineSpacing;
recordPlaceholderInfo(index, character);
index++;
continue;
}
auto tokenLen = nextTokenLen(_utf16Text, index, textLen);
float tokenHighestY = highestY;;
float tokenLowestY = lowestY;
float tokenRight = letterRight;
float nextLetterX = nextTokenX;
bool newLine = false;
for (int tmp = 0; tmp < tokenLen;++tmp)
{
int letterIndex = index + tmp;
character = _utf16Text[letterIndex];
if (character == (char16_t)TextFormatter::CarriageReturn)
{
recordPlaceholderInfo(letterIndex, character);
continue;
}
// \b - Next char not change x position
if (character == (char16_t)TextFormatter::NextCharNoChangeX)
{
nextChangeSize = false;
recordPlaceholderInfo(letterIndex, character);
continue;
}
if (_fontAtlas->getLetterDefinitionForChar(character, letterDef) == false)
{
recordPlaceholderInfo(letterIndex, character);
CCLOG("LabelTextFormatter error:can't find letter definition in font file for letter: %c", character);
continue;
}
auto letterX = (nextLetterX + letterDef.offsetX * _bmfontScale) / contentScaleFactor;
if (_enableWrap && _maxLineWidth > 0.f && nextTokenX > 0.f && letterX + letterDef.width * _bmfontScale > _maxLineWidth
&& !StringUtils::isUnicodeSpace(character) && nextChangeSize)
{
_linesWidth.push_back(letterRight);
letterRight = 0.f;
lineIndex++;
nextTokenX = 0.f;
nextTokenY -= (_lineHeight*_bmfontScale + lineSpacing);
newLine = true;
break;
}
else
{
letterPosition.x = letterX;
}
letterPosition.y = (nextTokenY - letterDef.offsetY * _bmfontScale) / contentScaleFactor;
recordLetterInfo(letterPosition, character, letterIndex, lineIndex);
if (nextChangeSize)
{
if (_horizontalKernings && letterIndex < textLen - 1)
nextLetterX += _horizontalKernings[letterIndex + 1];
nextLetterX += letterDef.xAdvance * _bmfontScale + _additionalKerning;
tokenRight = nextLetterX / contentScaleFactor;
}
nextChangeSize = true;
if (tokenHighestY < letterPosition.y)
tokenHighestY = letterPosition.y;
if (tokenLowestY > letterPosition.y - letterDef.height * _bmfontScale)
tokenLowestY = letterPosition.y - letterDef.height * _bmfontScale;
}
if (newLine)
{
continue;
}
nextTokenX = nextLetterX;
letterRight = tokenRight;
if (highestY < tokenHighestY)
highestY = tokenHighestY;
if (lowestY > tokenLowestY)
lowestY = tokenLowestY;
if (longestLine < letterRight)
longestLine = letterRight;
index += tokenLen;
}
_linesWidth.push_back(letterRight);
_numberOfLines = lineIndex + 1;
_textDesiredHeight = (_numberOfLines * _lineHeight * _bmfontScale) / contentScaleFactor;
if (_numberOfLines > 1)
_textDesiredHeight += (_numberOfLines - 1) * _lineSpacing;
Size contentSize(_labelWidth, _labelHeight);
if (_labelWidth <= 0.f)
contentSize.width = longestLine;
if (_labelHeight <= 0.f)
contentSize.height = _textDesiredHeight;
setContentSize(contentSize);
_tailoredTopY = contentSize.height;
_tailoredBottomY = 0.f;
if (highestY > 0.f)
_tailoredTopY = contentSize.height + highestY;
if (lowestY < -_textDesiredHeight)
_tailoredBottomY = _textDesiredHeight + lowestY;
return true;
}
