X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/655719367ac5e131d9642e5783f3ecf64d1a3385..7ddb15416407390de67cc26b04e91ea99a521f57:/include/wx/html/htmlpars.h diff --git a/include/wx/html/htmlpars.h b/include/wx/html/htmlpars.h index fbd3112192..defce67bb4 100644 --- a/include/wx/html/htmlpars.h +++ b/include/wx/html/htmlpars.h @@ -1,5 +1,5 @@ ///////////////////////////////////////////////////////////////////////////// -// Name: htmlpars.h +// Name: wx/html/htmlpars.h // Purpose: wxHtmlParser class (generic parser) // Author: Vaclav Slavik // RCS-ID: $Id$ @@ -7,30 +7,35 @@ // Licence: wxWindows licence ///////////////////////////////////////////////////////////////////////////// - #ifndef _WX_HTMLPARS_H_ #define _WX_HTMLPARS_H_ -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) -#pragma interface "htmlpars.h" -#endif - #include "wx/defs.h" #if wxUSE_HTML #include "wx/html/htmltag.h" #include "wx/filesys.h" -#include "wx/hash.h" +#include "wx/hashmap.h" +#include "wx/hashset.h" +#include "wx/vector.h" #include "wx/fontenc.h" -class WXDLLIMPEXP_BASE wxMBConv; -class WXDLLIMPEXP_HTML wxHtmlParser; -class WXDLLIMPEXP_HTML wxHtmlTagHandler; -class WXDLLIMPEXP_HTML wxHtmlEntitiesParser; +class WXDLLIMPEXP_FWD_BASE wxMBConv; +class WXDLLIMPEXP_FWD_HTML wxHtmlParser; +class WXDLLIMPEXP_FWD_HTML wxHtmlTagHandler; +class WXDLLIMPEXP_FWD_HTML wxHtmlEntitiesParser; class wxHtmlTextPieces; class wxHtmlParserState; +WX_DECLARE_HASH_SET_WITH_DECL_PTR(wxHtmlTagHandler*, + wxPointerHash, wxPointerEqual, + wxHtmlTagHandlersSet, + class WXDLLIMPEXP_HTML); +WX_DECLARE_STRING_HASH_MAP_WITH_DECL(wxHtmlTagHandler*, + wxHtmlTagHandlersHash, + class WXDLLIMPEXP_HTML); + enum wxHtmlURLType { @@ -40,7 +45,7 @@ enum wxHtmlURLType }; // This class handles generic parsing of HTML document : it scans -// the document and divide it into blocks of tags (where one block +// the document and divides it into blocks of tags (where one block // consists of starting and ending tag and of text between these // 2 tags. class WXDLLIMPEXP_HTML wxHtmlParser : public wxObject @@ -57,14 +62,14 @@ public: wxFileSystem* GetFS() const { return m_FS; } // Opens file if the parser is allowed to open given URL (may be forbidden - // for security reasons) + // for security reasons) virtual wxFSFile *OpenURL(wxHtmlURLType type, const wxString& url) const; // You can simply call this method when you need parsed output. // This method does these things: // 1. call InitParser(source); // 2. call DoParsing(); - // 3. call GetProduct(); (it's return value is then returned) + // 3. call GetProduct(); (its return value is then returned) // 4. call DoneParser(); wxObject* Parse(const wxString& source); @@ -72,13 +77,14 @@ public: virtual void InitParser(const wxString& source); // This must be called after Parse(). virtual void DoneParser(); - + // May be called during parsing to immediately return from Parse(). - virtual void StopParsing() { m_stopParsing = TRUE; } + virtual void StopParsing() { m_stopParsing = true; } // Parses the m_Source from begin_pos to end_pos-1. // (in noparams version it parses whole m_Source) - void DoParsing(int begin_pos, int end_pos); + void DoParsing(const wxString::const_iterator& begin_pos, + const wxString::const_iterator& end_pos); void DoParsing(); // Returns pointer to the tag at parser's current position @@ -93,7 +99,7 @@ public: // adds handler to the list & hash table of handlers. virtual void AddTagHandler(wxHtmlTagHandler *handler); - // Forces the handler to handle additional tags (not returned by GetSupportedTags). + // Forces the handler to handle additional tags (not returned by GetSupportedTags). // The handler should already be in use by this parser. // Example: you want to parse following pseudo-html structure: // @@ -101,55 +107,66 @@ public: // // // This last it has different meaning, we don't want it to be parsed by myitems handler! - // handler can handle only 'myitems' (e.g. it's GetSupportedTags returns "MYITEMS") + // handler can handle only 'myitems' (e.g. its GetSupportedTags returns "MYITEMS") // you can call PushTagHandler(handler, "IT") when you find // and call PopTagHandler() when you find - void PushTagHandler(wxHtmlTagHandler *handler, wxString tags); + void PushTagHandler(wxHtmlTagHandler *handler, const wxString& tags); // Restores state before last call to PushTagHandler void PopTagHandler(); - wxString* GetSource() {return &m_Source;} + const wxString* GetSource() {return m_Source;} void SetSource(const wxString& src); - - // Sets HTML source and remebers current parser's state so that it can - // later be restored. This is useful for on-line modifications of + + // Sets HTML source and remembers current parser's state so that it can + // later be restored. This is useful for on-line modifications of // HTML source (for example,
 handler replaces spaces with  
     // and newlines with 
) virtual void SetSourceAndSaveState(const wxString& src); - // Restores parser's state from stack or returns FALSE if the stack is + // Restores parser's state from stack or returns false if the stack is // empty virtual bool RestoreState(); - + + // Returns HTML source inside the element (i.e. between the starting + // and ending tag) + wxString GetInnerSource(const wxHtmlTag& tag); + // Parses HTML string 'markup' and extracts charset info from tag // if present. Returns empty string if the tag is missing. // For wxHTML's internal use. static wxString ExtractCharsetInformation(const wxString& markup); + // Returns entity parser object, used to substitute HTML &entities; + wxHtmlEntitiesParser *GetEntitiesParser() const { return m_entitiesParser; } + + // Returns true if the tag starting at the given position is a comment tag + // + // p should point to '<' character and is modified to point to the closing + // '>' of the end comment tag if this is indeed a comment + static bool + SkipCommentTag(wxString::const_iterator& p, wxString::const_iterator end); + protected: // DOM structure void CreateDOMTree(); void DestroyDOMTree(); void CreateDOMSubTree(wxHtmlTag *cur, - int begin_pos, int end_pos, + const wxString::const_iterator& begin_pos, + const wxString::const_iterator& end_pos, wxHtmlTagsCache *cache); // Adds text to the output. - // This is called from Parse() and must be overriden in derived classes. - // txt is not guaranteed to be only one word. It is largest continuous part of text - // (= not broken by tags) - // NOTE : using char* because of speed improvements - virtual void AddText(const wxChar* txt) = 0; + // This is called from Parse() and must be overridden in derived classes. + // txt is not guaranteed to be only one word. It is largest continuous part + // of text (= not broken by tags) + virtual void AddText(const wxString& txt) = 0; // Adds tag and proceeds it. Parse() may (and usually is) called from this method. - // This is called from Parse() and may be overriden. - // Default behavior is that it looks for proper handler in m_Handlers. The tag is + // This is called from Parse() and may be overridden. + // Default behaviour is that it looks for proper handler in m_Handlers. The tag is // ignored if no hander is found. // Derived class is *responsible* for filling in m_Handlers table. virtual void AddTag(const wxHtmlTag& tag); - - // Returns entity parser object, used to substitute HTML &entities; - wxHtmlEntitiesParser *GetEntitiesParser() const { return m_entitiesParser; } protected: // DOM tree: @@ -158,10 +175,10 @@ protected: wxHtmlTextPieces *m_TextPieces; size_t m_CurTextPiece; - wxString m_Source; - + const wxString *m_Source; + wxHtmlParserState *m_SavedStates; - + // handlers that handle particular tags. The table is accessed by // key = tag's name. // This attribute MUST be filled by derived class otherwise it would @@ -171,19 +188,19 @@ protected: // it may (and often does) contain more references to one object // m_HandlersList is list of all handlers and it is guaranteed to contain // only one reference to each handler instance. - wxList m_HandlersList; - wxHashTable m_HandlersHash; + wxHtmlTagHandlersSet m_HandlersSet; + wxHtmlTagHandlersHash m_HandlersHash; - DECLARE_NO_COPY_CLASS(wxHtmlParser) + wxDECLARE_NO_COPY_CLASS(wxHtmlParser); // class for opening files (file system) wxFileSystem *m_FS; // handlers stack used by PushTagHandler and PopTagHandler - wxList *m_HandlersStack; - + wxVector m_HandlersStack; + // entity parse wxHtmlEntitiesParser *m_entitiesParser; - + // flag indicating that the parser should stop bool m_stopParsing; }; @@ -194,7 +211,7 @@ protected: // Each recognized tag is passed to handler which is capable // of handling it. Each tag is handled in 3 steps: // 1. Handler will modifies state of parser -// (using it's public methods) +// (using its public methods) // 2. Parser parses source between starting and ending tag // 3. Handler restores original state of the parser class WXDLLIMPEXP_HTML wxHtmlTagHandler : public wxObject @@ -208,9 +225,12 @@ public: // NOTE : each _instance_ of handler is guaranteed to be called // only by one parser. This means you don't have to care about // reentrancy. - virtual void SetParser(wxHtmlParser *parser) + virtual void SetParser(wxHtmlParser *parser) { m_Parser = parser; } + // Get the parser associated with this tag handler. + wxHtmlParser* GetParser() const { return m_Parser; } + // Returns list of supported tags. The list is in uppercase and // tags are delimited by ','. // Example : "I,B,FONT,P" @@ -219,19 +239,25 @@ public: // This is hadling core method. It does all the Steps 1-3. // To process step 2, you can call ParseInner() - // returned value : TRUE if it called ParseInner(), - // FALSE etherwise + // returned value : true if it called ParseInner(), + // false etherwise virtual bool HandleTag(const wxHtmlTag& tag) = 0; protected: // parses input between beginning and ending tag. // m_Parser must be set. - void ParseInner(const wxHtmlTag& tag) - { m_Parser->DoParsing(tag.GetBeginPos(), tag.GetEndPos1()); } + void ParseInner(const wxHtmlTag& tag) + { m_Parser->DoParsing(tag.GetBeginIter(), tag.GetEndIter1()); } + + // Parses given source as if it was tag's inner code (see + // wxHtmlParser::GetInnerSource). Unlike ParseInner(), this method lets + // you specify the source code to parse. This is useful when you need to + // modify the inner text before parsing. + void ParseInnerSource(const wxString& source); wxHtmlParser *m_Parser; - DECLARE_NO_COPY_CLASS(wxHtmlTagHandler) + wxDECLARE_NO_COPY_CLASS(wxHtmlTagHandler); }; @@ -244,32 +270,36 @@ class WXDLLIMPEXP_HTML wxHtmlEntitiesParser : public wxObject public: wxHtmlEntitiesParser(); virtual ~wxHtmlEntitiesParser(); - + // Sets encoding of output string. - // Has no effect if wxUSE_WCHAR_T==0 or wxUSE_UNICODE==1 + // Has no effect if wxUSE_UNICODE==1 +#if wxUSE_UNICODE + void SetEncoding(wxFontEncoding WXUNUSED(encoding)) {} +#else void SetEncoding(wxFontEncoding encoding); - +#endif + // Parses entities in input and replaces them with respective characters // (with respect to output encoding) - wxString Parse(const wxString& input); + wxString Parse(const wxString& input) const; // Returns character for given entity or 0 if the enity is unknown - wxChar GetEntityChar(const wxString& entity); + wxChar GetEntityChar(const wxString& entity) const; // Returns character that represents given Unicode code #if wxUSE_UNICODE - wxChar GetCharForCode(unsigned code) { return (wxChar)code; } + wxChar GetCharForCode(unsigned code) const { return (wxChar)code; } #else - wxChar GetCharForCode(unsigned code); + wxChar GetCharForCode(unsigned code) const; #endif protected: -#if wxUSE_WCHAR_T && !wxUSE_UNICODE +#if !wxUSE_UNICODE wxMBConv *m_conv; wxFontEncoding m_encoding; #endif - DECLARE_NO_COPY_CLASS(wxHtmlEntitiesParser) + wxDECLARE_NO_COPY_CLASS(wxHtmlEntitiesParser); };