예제 #1
0
        // src: ( uri-src | local-src ) (',' ( uri-src | local-src ) )*
        // uri-src: uri [ 'format(' string ( ',' string )* ')' ]
        // local-src: 'local(' ( string | ident ) ')'
        internal bool ParseFontSrc(ref nsCSSValue aValue)
        {
            // could we maybe turn nsCSSValue[] into List<nsCSSValue>?
              var values = new List<nsCSSValue>();
              var cur = new nsCSSValue();
              for (;;) {
            if (!GetToken(true))
              break;

            if (mToken.mType == nsCSSTokenType.URL) {
              SetValueToURL(ref cur, mToken.mIdentStr);
              values.AppendElement(cur);
              if (!ParseFontSrcFormat(values))
                return false;

            } else if (mToken.mType == nsCSSTokenType.Function &&
                       mToken.mIdentStr.LowerCaseEqualsLiteral("local")) {
              // css3-fonts does not specify a formal grammar for local().
              // The text permits both unquoted identifiers and quoted
              // strings.  We resolve this ambiguity in the spec by
              // assuming that the appropriate production is a single
              // <family-name>, possibly surrounded by whitespace.

              var family = new StringBuilder();
              bool single = false;
              if (!ParseOneFamily(family, ref single)) {
                SkipUntil(')');
                return false;
              }
              if (!ExpectSymbol(')', true)) {
                SkipUntil(')');
                return false;
              }

              // the style parameters to the nsFont constructor are ignored,
              // because it's only being used to call EnumerateFamilies
              var font = new nsFont(family, 0, 0, 0, 0, 0, 0);
              var dat = new ExtractFirstFamilyData();

              font.EnumerateFamilies(ExtractFirstFamily, (object) dat);
              if (!dat.mGood)
                return false;

              cur.SetStringValue(dat.mFamilyName, nsCSSUnit.LocalFont);
              values.AppendElement(cur);
            } else {
              // We don't know what to do with this token; unget it and error out
              UngetToken();
              return false;
            }

            if (!ExpectSymbol(',', true))
              break;
              }

              if (values.Length() == 0)
            return false;

              nsCSSValue[] srcVals
            = new nsCSSValue[values.Length()];

              uint32_t i = 0;
              for (i = 0; i < values.Length(); i++)
            srcVals[i] = values[i];
              aValue.SetArrayValue(srcVals, nsCSSUnit.Array);
              return true;
        }
예제 #2
0
        // font-descriptor: descriptor ':' value ';'
        // caller has advanced mToken to point at the descriptor
        internal bool ParseFontDescriptorValue(nsCSSFontDesc aDescID,
                                                ref nsCSSValue aValue)
        {
            switch (aDescID) {
            // These four are similar to the properties of the same name,
            // possibly with more restrictions on the values they can take.

              case nsCSSFontDesc.Family: {
            if (!ParseFamily(ref aValue) ||
                aValue.GetUnit() != nsCSSUnit.Families)
              return false;

            // the style parameters to the nsFont constructor are ignored,
            // because it's only being used to call EnumerateFamilies
            string valueStr = "";
            aValue.GetStringValue(ref valueStr);
            var font = new nsFont(valueStr, 0, 0, 0, 0, 0, 0);
            var dat = new ExtractFirstFamilyData();

            font.EnumerateFamilies(ExtractFirstFamily, (object) dat);
            if (!dat.mGood)
              return false;

            aValue.SetStringValue(dat.mFamilyName, nsCSSUnit.String);
            return true;
              }

            goto case nsCSSFontDesc.Style;
              case nsCSSFontDesc.Style:
            // property is VARIANT_HMK|VARIANT_SYSFONT
            return ParseVariant(ref aValue, VARIANT_KEYWORD | VARIANT_NORMAL,
                                nsCSSProps.kFontStyleKTable);

              case nsCSSFontDesc.Weight:
            return (ParseFontWeight(ref aValue) &&
                    aValue.GetUnit() != nsCSSUnit.Inherit &&
                    aValue.GetUnit() != nsCSSUnit.Initial &&
                    (aValue.GetUnit() != nsCSSUnit.Enumerated ||
                     (aValue.GetIntValue() != nsStyle.FONT_WEIGHT_BOLDER &&
                      aValue.GetIntValue() != nsStyle.FONT_WEIGHT_LIGHTER)));

              case nsCSSFontDesc.Stretch:
            // property is VARIANT_HK|VARIANT_SYSFONT
            return ParseVariant(ref aValue, VARIANT_KEYWORD,
                                nsCSSProps.kFontStretchKTable);

            // These two are unique to @font-face and have their own special grammar.
            goto case nsCSSFontDesc.Src;
              case nsCSSFontDesc.Src:
            return ParseFontSrc(ref aValue);

              case nsCSSFontDesc.UnicodeRange:
            return ParseFontRanges(ref aValue);

              case nsCSSFontDesc.FontFeatureSettings:
            return ParseFontFeatureSettings(ref aValue);

              case nsCSSFontDesc.FontLanguageOverride:
            return ParseVariant(ref aValue, VARIANT_NORMAL | VARIANT_STRING, null);

              case nsCSSFontDesc.UNKNOWN:
              case nsCSSFontDesc.COUNT:
            Debug.Fail("bad nsCSSFontDesc code");
            break;
              }
              // explicitly do NOT have a default case to let the compiler
              // help find missing descriptors
              return false;
        }