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119 lines
3.6 KiB
C++
119 lines
3.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsCSSScanner_h___
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#define nsCSSScanner_h___
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#include "nsString.h"
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class nsIUnicharInputStream;
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// Token types
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enum nsCSSTokenType {
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// A css identifier (e.g. foo)
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eCSSToken_Ident = 0,
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// A css at keyword (e.g. @foo)
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eCSSToken_AtKeyword = 1,
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// A css number without a percentage or dimension; with percentage;
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// without percentage but with a dimension
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eCSSToken_Number = 2,
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eCSSToken_Percentage = 3,
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eCSSToken_Dimension = 4,
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// A css string (e.g. "foo" or 'foo')
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eCSSToken_String = 5,
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// Whitespace (e.g. " " or "/* abc */" or "// foo <eol>")
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eCSSToken_WhiteSpace = 6,
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// A css symbol (e.g. ':', ';', '+', etc.)
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eCSSToken_Symbol = 7,
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eCSSToken_URL = 8, // use getString
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eCSSToken_InvalidURL = 9, // doesn't matter
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// A css1 id (e.g. #foo3)
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eCSSToken_ID = 10, // use getString()
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};
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struct nsCSSToken {
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nsCSSTokenType mType;
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nsAutoString mIdent;
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float mNumber;
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PRInt32 mInteger;
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PRUnichar mSymbol;
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PRBool mIntegerValid;
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nsCSSToken();
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PRBool isDimension() {
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return (PRBool)
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((eCSSToken_Dimension == mType) ||
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((eCSSToken_Number == mType) && (mNumber == 0.0f)));
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}
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};
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// CSS Scanner API. Used to tokenize an input stream using the CSS
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// forward compatible tokenization rules. This implementation is
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// private to this package and is only used internally by the css
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// parser.
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class nsCSSScanner {
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public:
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nsCSSScanner();
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~nsCSSScanner();
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// Init the scanner.
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void Init(nsIUnicharInputStream* aInput);
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// Get the next token. Return nsfalse on EOF or ERROR. aTokenResult
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// is filled in with the data for the token.
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PRBool Next(PRInt32* aErrorCode, nsCSSToken* aTokenResult);
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protected:
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void Close();
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PRInt32 Read(PRInt32* aErrorCode);
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PRInt32 Peek(PRInt32* aErrorCode);
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void Unread();
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PRBool LookAhead(PRInt32* aErrorCode, PRUnichar aChar);
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PRBool EatWhiteSpace(PRInt32* aErrorCode);
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PRBool EatNewline(PRInt32* aErrorCode);
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PRInt32 ParseEscape(PRInt32* aErrorCode);
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PRBool ParseIdent(PRInt32* aErrorCode, PRInt32 aChar, nsCSSToken* aResult);
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PRBool ParseAtKeyword(PRInt32* aErrorCode, PRInt32 aChar,
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nsCSSToken* aResult);
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PRBool ParseNumber(PRInt32* aErrorCode, PRInt32 aChar, nsCSSToken* aResult);
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PRBool ParseID(PRInt32* aErrorCode, PRInt32 aChar, nsCSSToken* aResult);
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PRBool ParseString(PRInt32* aErrorCode, PRInt32 aChar, nsCSSToken* aResult);
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PRBool ParseEOLComment(PRInt32* aErrorCode, nsCSSToken* aResult);
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PRBool ParseCComment(PRInt32* aErrorCode, nsCSSToken* aResult);
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PRBool GatherString(PRInt32* aErrorCode, PRInt32 aStop,
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nsString& aString);
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PRBool GatherIdent(PRInt32* aErrorCode, PRInt32 aChar, nsString& aIdent);
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nsIUnicharInputStream* mInput;
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PRUnichar* mBuffer;
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PRInt32 mOffset;
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PRInt32 mCount;
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PRInt32 mLookAhead;
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PRInt32 mLastRead;
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};
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#endif /* nsCSSScanner_h___ */
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