void Text::UpdateCharLocations()
{
// Remember the font face to see if it's still valid when it's time to render
FontFace* face = font_ ? font_->GetFace(fontSize_) : nullptr;
if (!face)
return;
fontFace_ = face;
auto rowHeight = RoundToInt(rowSpacing_ * rowHeight_);
// Store position & size of each character, and locations per texture page
unsigned numChars = unicodeText_.size();
charLocations_.resize(numChars + 1);
pageGlyphLocations_.resize(face->GetTextures().size());
for (unsigned i = 0; i < pageGlyphLocations_.size(); ++i)
pageGlyphLocations_[i].clear();
IntVector2 offset = font_->GetTotalGlyphOffset(fontSize_);
unsigned rowIndex = 0;
unsigned lastFilled = 0;
float x = Round(GetRowStartPosition(rowIndex) + offset.x_);
float y = Round(offset.y_);
for (unsigned i = 0; i < printText_.size(); ++i)
{
CharLocation loc;
loc.position_ = Vector2(x, y);
unsigned c = printText_[i];
if (c != '\n')
{
const FontGlyph* glyph = face->GetGlyph(c);
loc.size_ = Vector2(glyph ? glyph->advanceX_ : 0, rowHeight_);
if (glyph)
{
// Store glyph's location for rendering. Verify that glyph page is valid
if (glyph->page_ < pageGlyphLocations_.size())
pageGlyphLocations_[glyph->page_].push_back(GlyphLocation(x, y, glyph));
x += glyph->advanceX_;
if (i < printText_.size() - 1)
x += face->GetKerning(c, printText_[i + 1]);
}
}
else
{
loc.size_ = Vector2::ZERO;
x = GetRowStartPosition(++rowIndex);
y += rowHeight;
}
if (lastFilled > printToText_[i])
lastFilled = printToText_[i];
// Fill gaps in case characters were skipped from printing
for (unsigned j = lastFilled; j <= printToText_[i]; ++j)
charLocations_[j] = loc;
lastFilled = printToText_[i] + 1;
}
// Store the ending position
charLocations_[numChars].position_ = Vector2(x, y);
charLocations_[numChars].size_ = Vector2::ZERO;
charLocationsDirty_ = false;
}
void Text::UpdateText(bool onResize)
{
rowWidths_.clear();
printText_.clear();
if (font_)
{
FontFace* face = font_->GetFace(fontSize_);
if (!face)
return;
rowHeight_ = face->GetRowHeight();
int width = 0;
int height = 0;
int rowWidth = 0;
auto rowHeight = RoundToInt(rowSpacing_ * rowHeight_);
// First see if the text must be split up
if (!wordWrap_)
{
printText_ = unicodeText_;
printToText_.resize(printText_.size());
for (unsigned i = 0; i < printText_.size(); ++i)
printToText_[i] = i;
}
else
{
int maxWidth = GetWidth();
unsigned nextBreak = 0;
unsigned lineStart = 0;
printToText_.clear();
for (unsigned i = 0; i < unicodeText_.size(); ++i)
{
unsigned j;
unsigned c = unicodeText_[i];
if (c != '\n')
{
bool ok = true;
if (nextBreak <= i)
{
int futureRowWidth = rowWidth;
for (j = i; j < unicodeText_.size(); ++j)
{
unsigned d = unicodeText_[j];
if (d == ' ' || d == '\n')
{
nextBreak = j;
break;
}
const FontGlyph* glyph = face->GetGlyph(d);
if (glyph)
{
futureRowWidth += glyph->advanceX_;
if (j < unicodeText_.size() - 1)
futureRowWidth += face->GetKerning(d, unicodeText_[j + 1]);
}
if (d == '-' && futureRowWidth <= maxWidth)
{
nextBreak = j + 1;
break;
}
if (futureRowWidth > maxWidth)
{
ok = false;
break;
}
}
}
if (!ok)
{
// If did not find any breaks on the line, copy until j, or at least 1 char, to prevent infinite loop
if (nextBreak == lineStart)
{
while (i < j)
{
printText_.push_back(unicodeText_[i]);
printToText_.push_back(i);
++i;
}
}
// Eliminate spaces that have been copied before the forced break
while (printText_.size() && printText_.back() == ' ')
{
printText_.pop_back();
printToText_.pop_back();
}
printText_.push_back('\n');
printToText_.push_back(Min(i, unicodeText_.size() - 1));
rowWidth = 0;
nextBreak = lineStart = i;
}
if (i < unicodeText_.size())
{
// When copying a space, position is allowed to be over row width
c = unicodeText_[i];
const FontGlyph* glyph = face->GetGlyph(c);
if (glyph)
{
rowWidth += glyph->advanceX_;
if (i < unicodeText_.size() - 1)
rowWidth += face->GetKerning(c, unicodeText_[i + 1]);
}
if (rowWidth <= maxWidth)
{
printText_.push_back(c);
printToText_.push_back(i);
}
}
}
else
{
printText_.push_back('\n');
printToText_.push_back(Min(i, unicodeText_.size() - 1));
rowWidth = 0;
nextBreak = lineStart = i;
}
}
}
rowWidth = 0;
for (unsigned i = 0; i < printText_.size(); ++i)
{
unsigned c = printText_[i];
if (c != '\n')
{
const FontGlyph* glyph = face->GetGlyph(c);
if (glyph)
{
rowWidth += glyph->advanceX_;
if (i < printText_.size() - 1)
rowWidth += face->GetKerning(c, printText_[i + 1]);
}
}
else
{
width = Max(width, rowWidth);
height += rowHeight;
rowWidths_.push_back(rowWidth);
rowWidth = 0;
}
}
if (rowWidth)
{
width = Max(width, rowWidth);
height += rowHeight;
rowWidths_.push_back(rowWidth);
}
// Set at least one row height even if text is empty
if (!height)
height = rowHeight;
// Set minimum and current size according to the text size, but respect fixed width if set
if (!IsFixedWidth())
{
if (wordWrap_)
SetMinWidth(0);
else
{
SetMinWidth(width);
SetWidth(width);
}
}
SetFixedHeight(height);
charLocationsDirty_ = true;
}
else
{
// No font, nothing to render
pageGlyphLocations_.clear();
}
// If wordwrap is on, parent may need layout update to correct for overshoot in size. However, do not do this when the
// update is a response to resize, as that could cause infinite recursion
if (wordWrap_ && !onResize)
{
UIElement* parent = GetParent();
if (parent && parent->GetLayoutMode() != LM_FREE)
parent->UpdateLayout();
}
}
