PRBool nsCSSScanner::Next(nsCSSToken& aToken) { for (;;) { // Infinite loop so we can restart after comments. PRInt32 ch = Read(); if (ch < 0) { return PR_FALSE; } // UNICODE-RANGE if ((ch == 'u' || ch == 'U') && Peek() == '+') return ParseURange(ch, aToken); // IDENT if (StartsIdent(ch, Peek())) return ParseIdent(ch, aToken); // AT_KEYWORD if (ch == '@') { PRInt32 nextChar = Read(); if (nextChar >= 0) { PRInt32 followingChar = Peek(); Pushback(nextChar); if (StartsIdent(nextChar, followingChar)) return ParseAtKeyword(ch, aToken); } } // NUMBER or DIM if ((ch == '.') || (ch == '+') || (ch == '-')) { PRInt32 nextChar = Peek(); if (IsDigit(nextChar)) { return ParseNumber(ch, aToken); } else if (('.' == nextChar) && ('.' != ch)) { nextChar = Read(); PRInt32 followingChar = Peek(); Pushback(nextChar); if (IsDigit(followingChar)) return ParseNumber(ch, aToken); } } if (IsDigit(ch)) { return ParseNumber(ch, aToken); } // ID if (ch == '#') { return ParseRef(ch, aToken); } // STRING if ((ch == '"') || (ch == '\'')) { return ParseString(ch, aToken); } // WS if (IsWhitespace(ch)) { aToken.mType = eCSSToken_WhiteSpace; aToken.mIdent.Assign(PRUnichar(ch)); EatWhiteSpace(); return PR_TRUE; } if (ch == '/' && !IsSVGMode()) { PRInt32 nextChar = Peek(); if (nextChar == '*') { (void) Read(); #if 0 // If we change our storage data structures such that comments are // stored (for Editor), we should reenable this code, condition it // on being in editor mode, and apply glazou's patch from bug // 60290. aToken.mIdent.SetCapacity(2); aToken.mIdent.Assign(PRUnichar(ch)); aToken.mIdent.Append(PRUnichar(nextChar)); return ParseCComment(aToken); #endif if (!SkipCComment()) { return PR_FALSE; } continue; // start again at the beginning } } if (ch == '<') { // consume HTML comment tags if (LookAhead('!')) { if (LookAhead('-')) { if (LookAhead('-')) { aToken.mType = eCSSToken_HTMLComment; aToken.mIdent.AssignLiteral("<!--"); return PR_TRUE; } Pushback('-'); } Pushback('!'); } } if (ch == '-') { // check for HTML comment end if (LookAhead('-')) { if (LookAhead('>')) { aToken.mType = eCSSToken_HTMLComment; aToken.mIdent.AssignLiteral("-->"); return PR_TRUE; } Pushback('-'); } } // INCLUDES ("~=") and DASHMATCH ("|=") if (( ch == '|' ) || ( ch == '~' ) || ( ch == '^' ) || ( ch == '$' ) || ( ch == '*' )) { PRInt32 nextChar = Read(); if ( nextChar == '=' ) { if (ch == '~') { aToken.mType = eCSSToken_Includes; } else if (ch == '|') { aToken.mType = eCSSToken_Dashmatch; } else if (ch == '^') { aToken.mType = eCSSToken_Beginsmatch; } else if (ch == '$') { aToken.mType = eCSSToken_Endsmatch; } else if (ch == '*') { aToken.mType = eCSSToken_Containsmatch; } return PR_TRUE; } else if (nextChar >= 0) { Pushback(nextChar); } } aToken.mType = eCSSToken_Symbol; aToken.mSymbol = ch; return PR_TRUE; } }
PRBool nsCSSScanner::Next(nsresult& aErrorCode, nsCSSToken& aToken) { PRInt32 ch = Read(aErrorCode); if (ch < 0) { return PR_FALSE; } PRUint8* lexTable = gLexTable; // IDENT if (StartsIdent(ch, Peek(aErrorCode), lexTable)) return ParseIdent(aErrorCode, ch, aToken); // From this point on, 0 <= ch < 256. // AT_KEYWORD if (ch == '@') { PRInt32 nextChar = Read(aErrorCode); PRInt32 followingChar = Peek(aErrorCode); Pushback(nextChar); if (StartsIdent(nextChar, followingChar, lexTable)) return ParseAtKeyword(aErrorCode, ch, aToken); } // NUMBER or DIM if ((ch == '.') || (ch == '+') || (ch == '-')) { PRInt32 nextChar = Peek(aErrorCode); if (CheckLexTable(nextChar, IS_DIGIT, lexTable)) { return ParseNumber(aErrorCode, ch, aToken); } else if (('.' == nextChar) && ('.' != ch)) { nextChar = Read(aErrorCode); PRInt32 followingChar = Peek(aErrorCode); Pushback(nextChar); if (CheckLexTable(followingChar, IS_DIGIT, lexTable)) return ParseNumber(aErrorCode, ch, aToken); } } if ((lexTable[ch] & IS_DIGIT) != 0) { return ParseNumber(aErrorCode, ch, aToken); } // ID if (ch == '#') { return ParseRef(aErrorCode, ch, aToken); } // STRING if ((ch == '"') || (ch == '\'')) { return ParseString(aErrorCode, ch, aToken); } // WS if ((lexTable[ch] & IS_WHITESPACE) != 0) { aToken.mType = eCSSToken_WhiteSpace; aToken.mIdent.Assign(PRUnichar(ch)); (void) EatWhiteSpace(aErrorCode); return PR_TRUE; } if (ch == '/') { PRInt32 nextChar = Peek(aErrorCode); if (nextChar == '*') { (void) Read(aErrorCode); #if 0 // If we change our storage data structures such that comments are // stored (for Editor), we should reenable this code, condition it // on being in editor mode, and apply glazou's patch from bug // 60290. aToken.mIdent.SetCapacity(2); aToken.mIdent.Assign(PRUnichar(ch)); aToken.mIdent.Append(PRUnichar(nextChar)); return ParseCComment(aErrorCode, aToken); #endif return SkipCComment(aErrorCode) && Next(aErrorCode, aToken); } } if (ch == '<') { // consume HTML comment tags if (LookAhead(aErrorCode, '!')) { if (LookAhead(aErrorCode, '-')) { if (LookAhead(aErrorCode, '-')) { aToken.mType = eCSSToken_HTMLComment; aToken.mIdent.AssignLiteral("<!--"); return PR_TRUE; } Pushback('-'); } Pushback('!'); } } if (ch == '-') { // check for HTML comment end if (LookAhead(aErrorCode, '-')) { if (LookAhead(aErrorCode, '>')) { aToken.mType = eCSSToken_HTMLComment; aToken.mIdent.AssignLiteral("-->"); return PR_TRUE; } Pushback('-'); } } // INCLUDES ("~=") and DASHMATCH ("|=") if (( ch == '|' ) || ( ch == '~' ) || ( ch == '^' ) || ( ch == '$' ) || ( ch == '*' )) { PRInt32 nextChar = Read(aErrorCode); if ( nextChar == '=' ) { if (ch == '~') { aToken.mType = eCSSToken_Includes; } else if (ch == '|') { aToken.mType = eCSSToken_Dashmatch; } else if (ch == '^') { aToken.mType = eCSSToken_Beginsmatch; } else if (ch == '$') { aToken.mType = eCSSToken_Endsmatch; } else if (ch == '*') { aToken.mType = eCSSToken_Containsmatch; } return PR_TRUE; } else { Pushback(nextChar); } } aToken.mType = eCSSToken_Symbol; aToken.mSymbol = ch; return PR_TRUE; }