gfxFontEntry*
gfxGDIFontList::GetDefaultFont(const gfxFontStyle* aStyle, PRBool& aNeedsBold)
{
// this really shouldn't fail to find a font....
HGDIOBJ hGDI = ::GetStockObject(DEFAULT_GUI_FONT);
LOGFONTW logFont;
if (hGDI && ::GetObjectW(hGDI, sizeof(logFont), &logFont)) {
nsAutoString resolvedName;
if (ResolveFontName(nsDependentString(logFont.lfFaceName), resolvedName)) {
return FindFontForFamily(resolvedName, aStyle, aNeedsBold);
}
}
// ...but just in case, try another approach as well
NONCLIENTMETRICSW ncm;
ncm.cbSize = sizeof(ncm);
BOOL status = ::SystemParametersInfoW(SPI_GETNONCLIENTMETRICS,
sizeof(ncm), &ncm, 0);
if (status) {
nsAutoString resolvedName;
if (ResolveFontName(nsDependentString(ncm.lfMessageFont.lfFaceName), resolvedName)) {
return FindFontForFamily(resolvedName, aStyle, aNeedsBold);
}
}
return nsnull;
}
gfxFontEntry*
gfxPlatformFontList::FindFontForChar(const PRUint32 aCh, gfxFont *aPrevFont)
{
// is codepoint with no matching font? return null immediately
if (mCodepointsWithNoFonts.test(aCh)) {
return nsnull;
}
// TODO: optimize fallback e.g. by caching lists of fonts to try for a given
// unicode range or script
// try to short-circuit font fallback for U+FFFD, used to represent encoding errors:
// just use a platform-specific fallback system font that is guaranteed (or at least
// highly likely) to be around, or a cached family from last time U+FFFD was seen.
// this helps speed up pages with lots of encoding errors, binary-as-text, etc.
if (aCh == 0xFFFD && mReplacementCharFallbackFamily.Length() > 0) {
gfxFontEntry* fontEntry = nsnull;
PRBool needsBold; // ignored in the system fallback case
if (aPrevFont) {
fontEntry = FindFontForFamily(mReplacementCharFallbackFamily, aPrevFont->GetStyle(), needsBold);
} else {
gfxFontStyle normalStyle;
fontEntry = FindFontForFamily(mReplacementCharFallbackFamily, &normalStyle, needsBold);
}
if (fontEntry && fontEntry->TestCharacterMap(aCh))
return fontEntry;
}
FontSearch data(aCh, aPrevFont);
// iterate over all font families to find a font that support the character
mFontFamilies.Enumerate(gfxPlatformFontList::FindFontForCharProc, &data);
// no match? add to set of non-matching codepoints
if (!data.mBestMatch) {
mCodepointsWithNoFonts.set(aCh);
} else if (aCh == 0xFFFD) {
mReplacementCharFallbackFamily = data.mBestMatch->FamilyName();
}
return data.mBestMatch;
}
gfxFontEntry*
gfxFT2FontList::GetDefaultFont(const gfxFontStyle* aStyle, PRBool& aNeedsBold)
{
#ifdef XP_WIN
HGDIOBJ hGDI = ::GetStockObject(SYSTEM_FONT);
LOGFONTW logFont;
if (hGDI && ::GetObjectW(hGDI, sizeof(logFont), &logFont)) {
nsAutoString resolvedName;
if (ResolveFontName(nsDependentString(logFont.lfFaceName), resolvedName)) {
return FindFontForFamily(resolvedName, aStyle, aNeedsBold);
}
}
#elif defined(ANDROID)
nsAutoString resolvedName;
if (ResolveFontName(NS_LITERAL_STRING("Droid Sans"), resolvedName))
return FindFontForFamily(resolvedName, aStyle, aNeedsBold);
#endif
/* TODO: what about Qt or other platforms that may use this? */
return nsnull;
}