int TextBuffer::applyWordWrapping(std::vector<FONSquad>& _quads,
const TextStyle::Parameters& _params,
const FontContext::FontMetrics& _metrics,
Label::Type _type, glm::vec2* _bbox,
std::vector<TextBuffer::WordBreak>& _wordBreaks) {
struct LineQuad {
std::vector<FONSquad*> quads;
float length = 0.0f;
};
float yOffset = 0.f, xOffset = 0.f;
int nLine = 1;
std::vector<LineQuad> lines;
if (_params.wordWrap < _params.text.length() && _type != Label::Type::line) {
_wordBreaks = findWords(_params.text);
} else {
for (auto& q : _quads) {
_bbox->x = std::max(_bbox->x, q.x1);
}
}
lines.push_back(LineQuad()); // atleast one line
// Apply word wrapping based on the word breaks
for (int iWord = 0; iWord < int(_wordBreaks.size()); iWord++) {
int start = _wordBreaks[iWord].start;
int end = _wordBreaks[iWord].end;
size_t wordSize = end - start + 1;
auto& lastLineQuads = lines[nLine - 1].quads;
// Check if quads need to be added to next line?
if (iWord > 0 && (lastLineQuads.size() + wordSize) > size_t(_params.maxLineWidth)) {
xOffset = 0.0f;
auto& quad = _quads[start];
auto& prevQuad = lines[nLine - 1].quads.front();
float baseLength = quad.x0 - prevQuad->x0;
yOffset += _metrics.lineHeight;
xOffset -= (baseLength);
lines.push_back(LineQuad());
nLine++;
}
for (int i = start; i <= end; i++) {
auto& q = _quads[i];
q.x0 += xOffset;
q.x1 += xOffset;
q.y0 += yOffset;
q.y1 += yOffset;
lines[nLine - 1].quads.push_back(&q);
lines[nLine - 1].length = q.x1;
// Adjust the bounding box on x
_bbox->x = std::max(_bbox->x, q.x1);
}
}
// Adjust the bounding box on y
_bbox->y = _metrics.lineHeight * nLine;
float bboxOffsetY = _bbox->y * 0.5f - _metrics.lineHeight - _metrics.descender;
// Apply justification
for (const auto& line : lines) {
float paddingRight = _bbox->x - line.length;
float padding = 0;
switch(_params.align) {
case TextLabelProperty::Align::left: padding = 0.f; break;
case TextLabelProperty::Align::right: padding = paddingRight; break;
case TextLabelProperty::Align::center: padding = paddingRight * 0.5f; break;
}
for (auto quad : line.quads) {
quad->x0 += padding;
quad->x1 += padding;
quad->y0 -= bboxOffsetY;
quad->y1 -= bboxOffsetY;
}
}
return nLine;
}
int TextBuffer::Builder::applyWordWrapping(std::vector<FONSquad>& _quads,
const TextStyle::Parameters& _params,
const FontContext::FontMetrics& _metrics) {
struct LineQuad {
std::vector<FONSquad*> quads;
float length = 0.0f;
};
float yOffset = 0.f, xOffset = 0.f;
int nLine = 1;
std::vector<LineQuad> lines;
if (_params.wordWrap && _params.maxLineWidth < _params.text.length()) {
findWords(_params.text, m_wordBreaks);
} else {
return 1;
}
lines.push_back(LineQuad()); // atleast one line
float totalWidth = 0.f;
// Apply word wrapping based on the word breaks
for (int iWord = 0; iWord < int(m_wordBreaks.size()); iWord++) {
int start = m_wordBreaks[iWord].start;
int end = m_wordBreaks[iWord].end;
size_t wordSize = end - start + 1;
auto& lastLineQuads = lines[nLine - 1].quads;
// Check if quads need to be added to next line?
if (iWord > 0 && (lastLineQuads.size() + wordSize) > size_t(_params.maxLineWidth)) {
xOffset = 0.0f;
auto& quad = _quads[start];
auto& prevQuad = lines[nLine - 1].quads.front();
float baseLength = quad.x0 - prevQuad->x0;
yOffset += _metrics.lineHeight;
xOffset -= (baseLength);
lines.push_back(LineQuad());
nLine++;
}
for (int i = start; i <= end; i++) {
auto& q = _quads[i];
q.x0 += xOffset;
q.x1 += xOffset;
q.y0 += yOffset;
q.y1 += yOffset;
lines[nLine - 1].quads.push_back(&q);
lines[nLine - 1].length = q.x1;
totalWidth = std::max(totalWidth, q.x1);
}
}
// Apply justification
for (const auto& line : lines) {
float paddingRight = totalWidth - line.length;
float padding = 0;
switch(_params.align) {
case TextLabelProperty::Align::left: padding = 0.f; break;
case TextLabelProperty::Align::right: padding = paddingRight; break;
case TextLabelProperty::Align::center: padding = paddingRight * 0.5f; break;
}
for (auto quad : line.quads) {
quad->x0 += padding;
quad->x1 += padding;
}
}
return nLine;
}
