bool FontFaceSet::check(const String& fontString, const String& text, ExceptionState& exceptionState)
{
if (!inActiveDocumentContext())
return false;
Font font;
if (!resolveFontStyle(fontString, font)) {
exceptionState.ThrowDOMException(SyntaxError, "Could not resolve '" + fontString + "' as a font.");
return false;
}
CSSFontSelector* fontSelector = document()->styleEngine()->fontSelector();
FontFaceCache* fontFaceCache = fontSelector->fontFaceCache();
bool hasLoadedFaces = false;
for (const FontFamily* f = &font.fontDescription().family(); f; f = f->next()) {
CSSSegmentedFontFace* face = fontFaceCache->get(font.fontDescription(), f->family());
if (face) {
if (!face->checkFont(nullToSpace(text)))
return false;
hasLoadedFaces = true;
}
}
if (hasLoadedFaces)
return true;
for (const FontFamily* f = &font.fontDescription().family(); f; f = f->next()) {
if (fontSelector->isPlatformFontAvailable(font.fontDescription(), f->family()))
return true;
}
return false;
}
ScriptPromise FontFaceSet::load(ScriptState* scriptState, const String& fontString, const String& text)
{
if (!inActiveDocumentContext())
return ScriptPromise();
Font font;
if (!resolveFontStyle(fontString, font)) {
RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
ScriptPromise promise = resolver->promise();
resolver->reject(DOMException::create(SyntaxError, "Could not resolve '" + fontString + "' as a font."));
return promise;
}
FontFaceCache* fontFaceCache = document()->styleEngine()->fontSelector()->fontFaceCache();
FontFaceArray faces;
for (const FontFamily* f = &font.fontDescription().family(); f; f = f->next()) {
CSSSegmentedFontFace* segmentedFontFace = fontFaceCache->get(font.fontDescription(), f->family());
if (segmentedFontFace)
segmentedFontFace->match(nullToSpace(text), faces);
}
RefPtr<LoadFontPromiseResolver> resolver = LoadFontPromiseResolver::create(faces, scriptState);
ScriptPromise promise = resolver->promise();
resolver->loadFonts(executionContext()); // After this, resolver->promise() may return null.
return promise;
}