зеркало из https://github.com/mozilla/pjs.git
221 строка
6.9 KiB
C++
221 строка
6.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.1 (the "License"); you may not use this file except in
|
|
* compliance with the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is mozilla.org code.
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Netscape Communications Corporation.
|
|
* Portions created by the Initial Developer are Copyright (C) 1998
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* L. David Baron <dbaron@dbaron.org>
|
|
* Daniel Glazman <glazman@netscape.com>
|
|
*
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the NPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the NPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
#ifndef nsCSSScanner_h___
|
|
#define nsCSSScanner_h___
|
|
|
|
#include "nsString.h"
|
|
class nsIUnicharInputStream;
|
|
|
|
// for testing
|
|
#ifdef DEBUG
|
|
#define CSS_REPORT_PARSE_ERRORS
|
|
#endif
|
|
|
|
// for #ifdef CSS_REPORT_PARSE_ERRORS
|
|
#include "nsXPIDLString.h"
|
|
class nsIURI;
|
|
|
|
// 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 "-->"
|
|
|
|
eCSSToken_Includes = 13, // "~="
|
|
eCSSToken_Dashmatch = 14, // "|="
|
|
eCSSToken_Beginsmatch = 15, // "^="
|
|
eCSSToken_Endsmatch = 16, // "$="
|
|
eCSSToken_Containsmatch = 17 // "*="
|
|
|
|
};
|
|
|
|
struct nsCSSToken {
|
|
nsCSSTokenType mType;
|
|
PRPackedBool mIntegerValid;
|
|
nsAutoString mIdent;
|
|
float mNumber;
|
|
PRInt32 mInteger;
|
|
PRUnichar mSymbol;
|
|
|
|
nsCSSToken();
|
|
|
|
PRBool IsDimension() {
|
|
return PRBool((eCSSToken_Dimension == mType) ||
|
|
((eCSSToken_Number == mType) && (mNumber == 0.0f)));
|
|
}
|
|
|
|
PRBool IsSymbol(PRUnichar aSymbol) {
|
|
return PRBool((eCSSToken_Symbol == mType) && (mSymbol == aSymbol));
|
|
}
|
|
|
|
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, nsIURI* aURI);
|
|
|
|
#ifdef CSS_REPORT_PARSE_ERRORS
|
|
void AddToError(const nsAString& aErrorText);
|
|
void OutputError();
|
|
void ClearError();
|
|
#endif
|
|
|
|
PRUint32 GetLineNumber();
|
|
|
|
// Get the next token. Return nsfalse on EOF or ERROR. aTokenResult
|
|
// is filled in with the data for the token.
|
|
PRBool Next(nsresult& aErrorCode, nsCSSToken& aTokenResult);
|
|
|
|
// Get the next token that may be a string or unquoted URL or whitespace
|
|
PRBool NextURL(nsresult& aErrorCode, nsCSSToken& aTokenResult);
|
|
|
|
static inline PRBool
|
|
IsIdentStart(PRInt32 aChar, const PRUint8* aLexTable)
|
|
{
|
|
return aChar >= 0 &&
|
|
(aChar >= 256 || (aLexTable[aChar] & START_IDENT) != 0);
|
|
}
|
|
|
|
static inline PRBool
|
|
StartsIdent(PRInt32 aFirstChar, PRInt32 aSecondChar,
|
|
const PRUint8* aLexTable)
|
|
{
|
|
return IsIdentStart(aFirstChar, aLexTable) ||
|
|
(aFirstChar == '-' && IsIdentStart(aSecondChar, aLexTable));
|
|
}
|
|
|
|
static inline const PRUint8* GetLexTable() {
|
|
return gLexTable;
|
|
}
|
|
|
|
protected:
|
|
void Close();
|
|
PRInt32 Read(nsresult& aErrorCode);
|
|
PRInt32 Peek(nsresult& aErrorCode);
|
|
void Unread();
|
|
void Pushback(PRUnichar aChar);
|
|
PRBool LookAhead(nsresult& aErrorCode, PRUnichar aChar);
|
|
PRBool EatWhiteSpace(nsresult& aErrorCode);
|
|
PRBool EatNewline(nsresult& aErrorCode);
|
|
|
|
PRInt32 ParseEscape(nsresult& aErrorCode);
|
|
PRBool ParseIdent(nsresult& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseAtKeyword(nsresult& aErrorCode, PRInt32 aChar,
|
|
nsCSSToken& aResult);
|
|
PRBool ParseNumber(nsresult& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseID(nsresult& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
PRBool ParseString(nsresult& aErrorCode, PRInt32 aChar, nsCSSToken& aResult);
|
|
#if 0
|
|
PRBool ParseEOLComment(nsresult& aErrorCode, nsCSSToken& aResult);
|
|
PRBool ParseCComment(nsresult& aErrorCode, nsCSSToken& aResult);
|
|
#endif
|
|
PRBool SkipCComment(nsresult& aErrorCode);
|
|
|
|
PRBool GatherString(nsresult& aErrorCode, PRInt32 aStop,
|
|
nsString& aString);
|
|
PRBool GatherIdent(nsresult& aErrorCode, PRInt32 aChar, nsString& aIdent);
|
|
|
|
nsIUnicharInputStream* mInput;
|
|
PRUnichar* mBuffer;
|
|
PRInt32 mOffset;
|
|
PRInt32 mCount;
|
|
PRUnichar* mPushback;
|
|
PRInt32 mPushbackCount;
|
|
PRInt32 mPushbackSize;
|
|
PRInt32 mLastRead;
|
|
PRUnichar mLocalPushback[4];
|
|
|
|
PRUint32 mLineNumber;
|
|
#ifdef CSS_REPORT_PARSE_ERRORS
|
|
nsXPIDLCString mFileName;
|
|
PRUint32 mErrorLineNumber, mColNumber, mErrorColNumber;
|
|
nsString mError;
|
|
#endif
|
|
|
|
static const PRUint8 IS_DIGIT;
|
|
static const PRUint8 IS_HEX_DIGIT;
|
|
static const PRUint8 IS_ALPHA;
|
|
static const PRUint8 START_IDENT;
|
|
static const PRUint8 IS_IDENT;
|
|
static const PRUint8 IS_WHITESPACE;
|
|
|
|
static PRUint8 gLexTable[256];
|
|
static void BuildLexTable();
|
|
static PRBool CheckLexTable(PRInt32 aChar, PRUint8 aBit, PRUint8* aLexTable);
|
|
};
|
|
|
|
#endif /* nsCSSScanner_h___ */
|