void CGUITextLayout::ParseText(const CStdStringW &text, uint32_t defaultStyle, color_t defaultColor, vecColors &colors, vecText &parsedText)
{
// run through the string, searching for:
// [B] or [/B] -> toggle bold on and off
// [I] or [/I] -> toggle italics on and off
// [COLOR ffab007f] or [/COLOR] -> toggle color on and off
// [CAPS <option>] or [/CAPS] -> toggle capatilization on and off
uint32_t currentStyle = defaultStyle; // start with the default font's style
color_t currentColor = 0;
colors.push_back(defaultColor);
stack<color_t> colorStack;
colorStack.push(0);
// these aren't independent, but that's probably not too much of an issue
// eg [UPPERCASE]Glah[LOWERCASE]FReD[/LOWERCASE]Georeg[/UPPERCASE] will work (lower case >> upper case)
// but [LOWERCASE]Glah[UPPERCASE]FReD[/UPPERCASE]Georeg[/LOWERCASE] won't
int startPos = 0;
size_t pos = text.find(L'[');
while (pos != std::string::npos && pos + 1 < text.size())
{
uint32_t newStyle = 0;
color_t newColor = currentColor;
bool colorTagChange = false;
bool newLine = false;
// have a [ - check if it's an ON or OFF switch
bool on(true);
size_t endPos = pos++; // finish of string
if (text[pos] == L'/')
{
on = false;
pos++;
}
// check for each type
if (text.compare(pos, 2, L"B]") == 0)
{ // bold - finish the current text block and assign the bold state
pos += 2;
if ((on && text.find(L"[/B]",pos) != std::string::npos) || // check for a matching end point
(!on && (currentStyle & FONT_STYLE_BOLD))) // or matching start point
newStyle = FONT_STYLE_BOLD;
}
else if (text.compare(pos, 2, L"I]") == 0)
{ // italics
pos += 2;
if ((on && text.find(L"[/I]", pos) != std::string::npos) || // check for a matching end point
(!on && (currentStyle & FONT_STYLE_ITALICS))) // or matching start point
newStyle = FONT_STYLE_ITALICS;
}
else if (text.compare(pos, 10, L"UPPERCASE]") == 0)
{
pos += 10;
if ((on && text.find(L"[/UPPERCASE]", pos) != std::string::npos) || // check for a matching end point
(!on && (currentStyle & FONT_STYLE_UPPERCASE))) // or matching start point
newStyle = FONT_STYLE_UPPERCASE;
}
else if (text.compare(pos, 10, L"LOWERCASE]") == 0)
{
pos += 10;
if ((on && text.find(L"[/LOWERCASE]", pos) != std::string::npos) || // check for a matching end point
(!on && (currentStyle & FONT_STYLE_LOWERCASE))) // or matching start point
newStyle = FONT_STYLE_LOWERCASE;
}
else if (text.compare(pos, 3, L"CR]") == 0 && on)
{
newLine = true;
pos += 3;
}
else if (text.compare(pos,5, L"COLOR") == 0)
{ // color
size_t finish = text.find(L']', pos + 5);
if (on && finish != std::string::npos && text.find(L"[/COLOR]",finish) != std::string::npos)
{
color_t color = g_colorManager.GetColor(text.substr(pos + 5, finish - pos - 5));
vecColors::const_iterator it = std::find(colors.begin(), colors.end(), color);
if (it == colors.end())
{ // create new color
if (colors.size() <= 0xFF)
{
newColor = colors.size();
colors.push_back(color);
}
else // we have only 8 bits for color index, fallback to first color if reach max.
newColor = 0;
}
else
// reuse existing color
newColor = it - colors.begin();
colorStack.push(newColor);
colorTagChange = true;
}
else if (!on && finish == pos + 5 && colorStack.size() > 1)
{ // revert to previous color
colorStack.pop();
newColor = colorStack.top();
colorTagChange = true;
}
if (finish != CStdString::npos)
pos = finish + 1;
}
if (newStyle || colorTagChange || newLine)
{ // we have a new style or a new color, so format up the previous segment
CStdStringW subText = text.substr(startPos, endPos - startPos);
if (currentStyle & FONT_STYLE_UPPERCASE)
StringUtils::ToUpper(subText);
if (currentStyle & FONT_STYLE_LOWERCASE)
StringUtils::ToLower(subText);
AppendToUTF32(subText, ((currentStyle & 3) << 24) | (currentColor << 16), parsedText);
if (newLine)
parsedText.push_back(L'\n');
// and switch to the new style
startPos = pos;
currentColor = newColor;
if (on)
currentStyle |= newStyle;
else
currentStyle &= ~newStyle;
}
pos = text.find(L'[', pos);
}
// now grab the remainder of the string
CStdStringW subText = text.substr(startPos);
if (currentStyle & FONT_STYLE_UPPERCASE)
StringUtils::ToUpper(subText);
if (currentStyle & FONT_STYLE_LOWERCASE)
StringUtils::ToLower(subText);
AppendToUTF32(subText, ((currentStyle & 3) << 24) | (currentColor << 16), parsedText);
}
