mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-26 18:31:29 +00:00
133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
#ifndef nsCSSScanner_h___
|
|
#define nsCSSScanner_h___
|
|
|
|
#include "nsString.h"
|
|
class nsIUnicharInputStream;
|
|
|
|
// Token types
|
|
enum nsCSSTokenType {
|
|
// A css identifier (e.g. foo)
|
|
eCSSToken_Ident = 0, // mIdent
|
|
|
|
// A css at keyword (e.g. @foo)
|
|
eCSSToken_AtKeyword = 1, // mIdent
|
|
|
|
// A css number without a percentage or dimension; with percentage;
|
|
// without percentage but with a dimension
|
|
eCSSToken_Number = 2, // mNumber
|
|
eCSSToken_Percentage = 3, // mNumber
|
|
eCSSToken_Dimension = 4, // mNumber + mIdent
|
|
|
|
// A css string (e.g. "foo" or 'foo')
|
|
eCSSToken_String = 5, // mSymbol + mIdent + mSymbol
|
|
|
|
// Whitespace (e.g. " " or "/* abc */")
|
|
eCSSToken_WhiteSpace = 6, // mIdent
|
|
|
|
// A css symbol (e.g. ':', ';', '+', etc.)
|
|
eCSSToken_Symbol = 7, // mSymbol
|
|
|
|
// A css1 id (e.g. #foo3)
|
|
eCSSToken_ID = 8, // mIdent
|
|
|
|
eCSSToken_Function = 9, // mIdent
|
|
|
|
eCSSToken_URL = 10, // mIdent
|
|
eCSSToken_InvalidURL = 11, // doesn't matter
|
|
|
|
eCSSToken_HTMLComment = 12 // "<!--" or "--{w}>"
|
|
|
|
};
|
|
|
|
struct nsCSSToken {
|
|
nsCSSTokenType mType;
|
|
nsAutoString mIdent;
|
|
float mNumber;
|
|
PRInt32 mInteger;
|
|
PRBool mIntegerValid;
|
|
PRUnichar mSymbol;
|
|
|
|
nsCSSToken();
|
|
|
|
PRBool isDimension() {
|
|
return (PRBool)
|
|
((eCSSToken_Dimension == mType) ||
|
|
((eCSSToken_Number == mType) && (mNumber == 0.0f)));
|
|
}
|
|
|
|
void AppendToString(nsString& aBuffer);
|
|
};
|
|
|
|
// CSS Scanner API. Used to tokenize an input stream using the CSS
|
|
// forward compatible tokenization rules. This implementation is
|
|
// private to this package and is only used internally by the css
|
|
// parser.
|
|
class nsCSSScanner {
|
|
public:
|
|
nsCSSScanner();
|
|
~nsCSSScanner();
|
|
|
|
// Init the scanner.
|
|
void Init(nsIUnicharInputStream* aInput);
|
|
|
|
// Get the next token. Return nsfalse on EOF or ERROR. aTokenResult
|
|
// is filled in with the data for the token.
|
|
PRBool Next(PRInt32& aErrorCode, nsCSSToken& aTokenResult);
|
|
|
|
// Get the next token that may be a string or unquoted URL or whitespace
|
|
PRBool NextURL(PRInt32& aErrorCode, nsCSSToken& aTokenResult);
|
|
|
|
protected:
|
|
void Close();
|
|
PRInt32 Read(PRInt32& aErrorCode);
|
|
PRInt32 Peek(PRInt32& aErrorCode);
|
|
void Unread();
|
|
void Pushback(PRUnichar aChar);
|
|
PRBool LookAhead(PRInt32& aErrorCode, PRUnichar aChar);
|
|
PRBool EatWhiteSpace(PRInt32& aErrorCode);
|
|
PRBool EatNewline(PRInt32& aErrorCode);
|
|
|
|
PRInt32 ParseEscape(PRInt32& aErrorCode);
|
|
PRBool ParseIdent(PRInt32& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseAtKeyword(PRInt32& aErrorCode, PRInt32 aChar,
|
|
nsCSSToken& aResult);
|
|
PRBool ParseNumber(PRInt32& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseID(PRInt32& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseString(PRInt32& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseEOLComment(PRInt32& aErrorCode, nsCSSToken& aResult);
|
|
PRBool ParseCComment(PRInt32& aErrorCode, nsCSSToken& aResult);
|
|
|
|
PRBool GatherString(PRInt32& aErrorCode, PRInt32 aStop,
|
|
nsString& aString);
|
|
PRBool GatherIdent(PRInt32& aErrorCode, PRInt32 aChar, nsString& aIdent);
|
|
|
|
nsIUnicharInputStream* mInput;
|
|
PRUnichar* mBuffer;
|
|
PRInt32 mOffset;
|
|
PRInt32 mCount;
|
|
PRUnichar* mPushback;
|
|
PRInt32 mPushbackCount;
|
|
PRInt32 mPushbackSize;
|
|
PRInt32 mLastRead;
|
|
PRUnichar mLocalPushback[4];
|
|
};
|
|
|
|
#endif /* nsCSSScanner_h___ */
|