mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
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214 lines
6.7 KiB
C++
214 lines
6.7 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* tokenization of CSS style sheets */
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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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#include "nsCOMPtr.h"
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#include "mozilla/css/Loader.h"
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#include "nsCSSStyleSheet.h"
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// XXX turn this off for minimo builds
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#define CSS_REPORT_PARSE_ERRORS
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// for #ifdef CSS_REPORT_PARSE_ERRORS
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#include "nsXPIDLString.h"
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class nsIURI;
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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, // mIdent
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// A css at keyword (e.g. @foo)
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eCSSToken_AtKeyword, // mIdent
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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, // mNumber
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eCSSToken_Percentage, // mNumber
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eCSSToken_Dimension, // mNumber + mIdent
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// A css string (e.g. "foo" or 'foo')
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eCSSToken_String, // mSymbol + mIdent + mSymbol
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// Whitespace (e.g. " " or "/* abc */")
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eCSSToken_WhiteSpace, // mIdent
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// A css symbol (e.g. ':', ';', '+', etc.)
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eCSSToken_Symbol, // mSymbol
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// A css1 id (e.g. #foo3)
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eCSSToken_ID, // mIdent
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// Just like eCSSToken_ID, except the part following the '#' is not
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// a valid CSS identifier (eg. starts with a digit, is the empty
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// string, etc).
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eCSSToken_Ref, // mIdent
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eCSSToken_Function, // mIdent
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eCSSToken_URL, // mIdent + mSymbol
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eCSSToken_Bad_URL, // mIdent + mSymbol
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eCSSToken_HTMLComment, // "<!--" or "-->"
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eCSSToken_Includes, // "~="
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eCSSToken_Dashmatch, // "|="
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eCSSToken_Beginsmatch, // "^="
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eCSSToken_Endsmatch, // "$="
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eCSSToken_Containsmatch, // "*="
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eCSSToken_URange, // Low in mInteger, high in mInteger2;
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// mIntegerValid is true if the token is a
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// valid range; mIdent preserves the textual
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// form of the token for error reporting
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// An unterminated string, which is always an error.
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eCSSToken_Bad_String // mSymbol + mIdent
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};
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struct nsCSSToken {
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nsAutoString mIdent NS_OKONHEAP;
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float mNumber;
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PRInt32 mInteger;
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PRInt32 mInteger2;
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nsCSSTokenType mType;
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PRUnichar mSymbol;
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bool mIntegerValid; // for number, dimension, urange
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bool mHasSign; // for number, percentage, and dimension
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nsCSSToken();
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bool IsSymbol(PRUnichar aSymbol) {
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return bool((eCSSToken_Symbol == mType) && (mSymbol == aSymbol));
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}
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void AppendToString(nsString& aBuffer);
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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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// |aLineNumber == 1| is the beginning of a file, use |aLineNumber == 0|
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// when the line number is unknown.
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void Init(const nsAString& aBuffer,
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nsIURI* aURI, PRUint32 aLineNumber,
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nsCSSStyleSheet* aSheet, mozilla::css::Loader* aLoader);
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void Close();
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static bool InitGlobals();
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static void ReleaseGlobals();
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// Set whether or not we are processing SVG
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void SetSVGMode(bool aSVGMode) {
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mSVGMode = aSVGMode;
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}
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bool IsSVGMode() const {
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return mSVGMode;
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}
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#ifdef CSS_REPORT_PARSE_ERRORS
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void AddToError(const nsSubstring& aErrorText);
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void OutputError();
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void ClearError();
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// aMessage must take no parameters
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void ReportUnexpected(const char* aMessage);
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private:
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void ReportUnexpectedParams(const char* aMessage,
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const PRUnichar** aParams,
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PRUint32 aParamsLength);
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public:
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template<PRUint32 N>
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void ReportUnexpectedParams(const char* aMessage,
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const PRUnichar* (&aParams)[N])
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{
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return ReportUnexpectedParams(aMessage, aParams, N);
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}
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// aLookingFor is a plain string, not a format string
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void ReportUnexpectedEOF(const char* aLookingFor);
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// aLookingFor is a single character
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void ReportUnexpectedEOF(PRUnichar aLookingFor);
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// aMessage must take 1 parameter (for the string representation of the
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// unexpected token)
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void ReportUnexpectedToken(nsCSSToken& tok, const char *aMessage);
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// aParams's first entry must be null, and we'll fill in the token
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void ReportUnexpectedTokenParams(nsCSSToken& tok,
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const char* aMessage,
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const PRUnichar **aParams,
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PRUint32 aParamsLength);
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#endif
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PRUint32 GetLineNumber() { return mLineNumber; }
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// Get the next token. Return false on EOF. aTokenResult
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// is filled in with the data for the token.
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bool Next(nsCSSToken& aTokenResult);
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// Get the next token that may be a string or unquoted URL
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bool NextURL(nsCSSToken& aTokenResult);
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// It's really ugly that we have to expose this, but it's the easiest
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// way to do :nth-child() parsing sanely. (In particular, in
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// :nth-child(2n-1), "2n-1" is a dimension, and we need to push the
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// "-1" back so we can read it again as a number.)
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void Pushback(PRUnichar aChar);
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protected:
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PRInt32 Read();
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PRInt32 Peek();
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bool LookAhead(PRUnichar aChar);
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bool LookAheadOrEOF(PRUnichar aChar); // expect either aChar or EOF
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void EatWhiteSpace();
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bool ParseAndAppendEscape(nsString& aOutput, bool aInString);
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bool ParseIdent(PRInt32 aChar, nsCSSToken& aResult);
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bool ParseAtKeyword(PRInt32 aChar, nsCSSToken& aResult);
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bool ParseNumber(PRInt32 aChar, nsCSSToken& aResult);
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bool ParseRef(PRInt32 aChar, nsCSSToken& aResult);
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bool ParseString(PRInt32 aChar, nsCSSToken& aResult);
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bool ParseURange(PRInt32 aChar, nsCSSToken& aResult);
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bool SkipCComment();
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bool GatherIdent(PRInt32 aChar, nsString& aIdent);
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const PRUnichar *mReadPointer;
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PRUint32 mOffset;
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PRUint32 mCount;
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PRUnichar* mPushback;
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PRInt32 mPushbackCount;
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PRInt32 mPushbackSize;
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PRUnichar mLocalPushback[4];
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PRUint32 mLineNumber;
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// True if we are in SVG mode; false in "normal" CSS
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bool mSVGMode;
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#ifdef CSS_REPORT_PARSE_ERRORS
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nsXPIDLCString mFileName;
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nsCOMPtr<nsIURI> mURI; // Cached so we know to not refetch mFileName
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PRUint32 mErrorLineNumber, mColNumber, mErrorColNumber;
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nsFixedString mError;
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PRUnichar mErrorBuf[200];
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PRUint64 mInnerWindowID;
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bool mWindowIDCached;
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nsCSSStyleSheet* mSheet;
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mozilla::css::Loader* mLoader;
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#endif
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};
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#endif /* nsCSSScanner_h___ */
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