gecko-dev/layout/style/nsICSSParser.h

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#ifndef nsCSS1Parser_h___
#define nsCSS1Parser_h___

#include "nsISupports.h"
#include "nsAWritableString.h"
class nsIStyleRule;
class nsICSSStyleSheet;
class nsIUnicharInputStream;
class nsIURI;
class nsCSSDeclaration;
class nsICSSLoader;
class nsICSSRule;
class nsISupportsArray;

#define NS_ICSS_PARSER_IID    \
{ 0xcc9c0610, 0x968c, 0x11d1, \
  {0x93, 0x23, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32} }

// Rule processing function
typedef void (*PR_CALLBACK RuleAppendFunc) (nsICSSRule* aRule, void* aData);

// Interface to the css parser.
class nsICSSParser : public nsISupports {
public:
  static const nsIID& GetIID() { static nsIID iid = NS_ICSS_PARSER_IID; return iid; }

  // Return a mask of the various css standards that this parser
  // supports.
  NS_IMETHOD GetInfoMask(PRUint32& aResult) = 0;

  // Set a style sheet for the parser to fill in. The style sheet must
  // implement the nsICSSStyleSheet interface
  NS_IMETHOD SetStyleSheet(nsICSSStyleSheet* aSheet) = 0;

  // Set whether or not tags & classes are case sensitive or uppercased
  NS_IMETHOD SetCaseSensitive(PRBool aCaseSensitive) = 0;

  // Set whether or not to emulate Nav quirks
  NS_IMETHOD SetQuirkMode(PRBool aQuirkMode) = 0;

  // Set loader to use for child sheets
  NS_IMETHOD SetChildLoader(nsICSSLoader* aChildLoader) = 0;

  NS_IMETHOD Parse(nsIUnicharInputStream* aInput,
                   nsIURI*                aInputURL,
                   nsICSSStyleSheet*&     aResult) = 0;

  // Parse HTML style attribute or its equivalent in other markup
  // languages.  aBaseURL is the base url to use for relative links in
  // the declaration.
  NS_IMETHOD ParseStyleAttribute(const nsAReadableString& aAttributeValue,
                                 nsIURI*                  aBaseURL,
                                 nsIStyleRule**           aResult) = 0;

  NS_IMETHOD ParseAndAppendDeclaration(const nsAReadableString& aBuffer,
                                       nsIURI*                  aBaseURL,
                                       nsCSSDeclaration*        aDeclaration,
                                       PRBool                   aParseOnlyOneDecl,
                                       PRInt32*                 aHint) = 0;

  NS_IMETHOD ParseRule(nsAReadableString& aRule,
                       nsIURI*            aBaseURL,
                       nsISupportsArray** aResult) = 0;

  NS_IMETHOD ParseProperty(const nsAReadableString& aPropName,
                           const nsAReadableString& aPropValue,
                           nsIURI* aBaseURL,
                           nsCSSDeclaration* aDeclaration,
                           PRInt32* aHint) = 0;
  
  // Charset management method:
  //  Set the charset before calling any of the Parse emthods if you want the 
  //  charset to be anything other than the default

  // sets the out-param to the current charset, as set by SetCharset
  NS_IMETHOD GetCharset(/*out*/nsAWritableString &aCharsetDest) const = 0;

  // SetCharset expects the charset to be the preferred charset
  // and it just records the string exactly as passed in (no alias resolution)
  NS_IMETHOD SetCharset(/*in*/ const nsAReadableString &aCharsetSrc) = 0;
};

// Values or'd in the GetInfoMask; other bits are reserved
#define NS_CSS_GETINFO_CSS1         ((PRUint32) 0x00000001L)
#define NS_CSS_GETINFO_CSSP         ((PRUint32) 0x00000002L)
#define NS_CSS_GETINFO_CSS2         ((PRUint32) 0x00000004L)
#define NS_CSS_GETINFO_CSS_FROSTING ((PRUint32) 0x00000008L)

// Success code that can be returned from ParseAndAppendDeclaration()
#define NS_CSS_PARSER_DROP_DECLARATION \
  NS_ERROR_GENERATE_SUCCESS(NS_ERROR_MODULE_LAYOUT,1)

extern NS_EXPORT nsresult
  NS_NewCSSParser(nsICSSParser** aInstancePtrResult);

#endif /* nsCSS1Parser_h___ */