X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/a7a4d01bdbb5c23d8f2025072f66ca91d3657bf3..e1146627e2bf16a48554e1c224f427dbd6247c5d:/include/wx/html/htmlpars.h diff --git a/include/wx/html/htmlpars.h b/include/wx/html/htmlpars.h index acf972ff42..0faf78d4dd 100644 --- a/include/wx/html/htmlpars.h +++ b/include/wx/html/htmlpars.h @@ -12,7 +12,7 @@ #define _WX_HTMLPARS_H_ #ifdef __GNUG__ -#pragma interface +#pragma interface "htmlpars.h" #endif #include "wx/defs.h" @@ -20,175 +20,228 @@ #include "wx/html/htmltag.h" #include "wx/filesys.h" +#include "wx/hash.h" +#include "wx/fontenc.h" -class wxHtmlParser; -class wxHtmlTagHandler; +class WXDLLEXPORT wxMBConv; +class WXDLLEXPORT wxHtmlParser; +class WXDLLEXPORT wxHtmlTagHandler; +class WXDLLEXPORT wxHtmlEntitiesParser; -//-------------------------------------------------------------------------------- -// wxHtmlParser -// This class handles generic parsing of HTML document : it scans -// the document and divide it into blocks of tags (where one block -// consists of starting and ending tag and of text between these -// 2 tags. -//-------------------------------------------------------------------------------- +class wxHtmlTextPieces; +class wxHtmlParserState; +// This class handles generic parsing of HTML document : it scans +// the document and divide it into blocks of tags (where one block +// consists of starting and ending tag and of text between these +// 2 tags. class WXDLLEXPORT wxHtmlParser : public wxObject { DECLARE_ABSTRACT_CLASS(wxHtmlParser) - public: - wxHtmlParser() : wxObject(), m_HandlersHash(wxKEY_STRING) {m_FS = NULL; m_Cache = NULL; m_HandlersStack = NULL;} - virtual ~wxHtmlParser(); - - void SetFS(wxFileSystem *fs) {m_FS = fs;} - // Sets the class which will be used for opening files - wxFileSystem* GetFS() const {return m_FS;} - - wxObject* Parse(const wxString& source); - // 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) - // 4. call DoneParser(); - - virtual void InitParser(const wxString& source); - // Sets the source. This must be called before running Parse() method. - virtual void DoneParser(); - // This must be called after Parse(). - - void DoParsing(int begin_pos, int end_pos); - inline void DoParsing() {DoParsing(0, m_Source.Length());}; - // Parses the m_Source from begin_pos to end_pos-1. - // (in noparams version it parses whole m_Source) - - virtual wxObject* GetProduct() = 0; - // Returns product of parsing - // Returned value is result of parsing of the part. The type of this result - // depends on internal representation in derived parser - // (see wxHtmlWinParser for details). - - virtual void AddTagHandler(wxHtmlTagHandler *handler); - // adds handler to the list & hash table of handlers. - - void PushTagHandler(wxHtmlTagHandler *handler, wxString tags); - // 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: - // - // - // - // - // 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") - // you can call PushTagHandler(handler, "IT") when you find - // and call PopTagHandler() when you find - - void PopTagHandler(); - // Restores state before last call to PushTagHandler - - wxString* GetSource() {return &m_Source;} - - virtual wxList* GetTempData() {return NULL;} - // this method returns list of wxObjects that represents - // all data allocated by the parser. These can't be freeded - // by destructor because they must be valid as long as - // GetProduct's return value is valid - the caller must - // explicitly call delete MyParser -> GetTempData() to free - // the memory - // (this method always sets the list to delete its contents) - - protected: - - virtual void AddText(const char* txt) = 0; - // 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 AddTag(const wxHtmlTag& tag); - // 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 - // ignored if no hander is found. - // Derived class is *responsible* for filling in m_Handlers table. - - - protected: - wxString m_Source; - // source being parsed - wxHtmlTagsCache *m_Cache; - // tags cache, used during parsing. - wxHashTable m_HandlersHash; - wxList m_HandlersList; - // 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 - // be empty and no tags would be recognized - // (see wxHtmlWinParser for details about filling it) - // m_HandlersHash is for random access based on knowledge of tag name (BR, P, etc.) - // 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. - wxFileSystem *m_FS; - // class for opening files (file system) - wxList *m_HandlersStack; - // handlers stack used by PushTagHandler and PopTagHandler - +public: + wxHtmlParser(); + virtual ~wxHtmlParser(); + + // Sets the class which will be used for opening files + void SetFS(wxFileSystem *fs) { m_FS = fs; } + + wxFileSystem* GetFS() const { return m_FS; } + + // Returns TRUE if the parser is allowed to open given URL (may be forbidden + // for security reasons) + virtual bool CanOpenURL(const wxString& url) const { return TRUE; } + + // 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) + // 4. call DoneParser(); + wxObject* Parse(const wxString& source); + + // Sets the source. This must be called before running Parse() method. + virtual void InitParser(const wxString& source); + // This must be called after Parse(). + virtual void DoneParser(); + + // 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(); + + // Returns pointer to the tag at parser's current position + wxHtmlTag *GetCurrentTag() const { return m_CurTag; } + + // Returns product of parsing + // Returned value is result of parsing of the part. The type of this result + // depends on internal representation in derived parser + // (see wxHtmlWinParser for details). + virtual wxObject* GetProduct() = 0; + + // 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). + // The handler should already be in use by this parser. + // Example: you want to parse following pseudo-html structure: + // + // + // + // + // 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") + // you can call PushTagHandler(handler, "IT") when you find + // and call PopTagHandler() when you find + void PushTagHandler(wxHtmlTagHandler *handler, wxString tags); + + // Restores state before last call to PushTagHandler + void PopTagHandler(); + + 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 + // 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 + // empty + virtual bool RestoreState(); + +protected: + // DOM structure + void CreateDOMTree(); + void DestroyDOMTree(); + void CreateDOMSubTree(wxHtmlTag *cur, + int begin_pos, int 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; + + // 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 + // 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: + wxHtmlTag *m_CurTag; + wxHtmlTag *m_Tags; + wxHtmlTextPieces *m_TextPieces; + size_t m_CurTextPiece; + + 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 + // be empty and no tags would be recognized + // (see wxHtmlWinParser for details about filling it) + // m_HandlersHash is for random access based on knowledge of tag name (BR, P, etc.) + // 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; + + // class for opening files (file system) + wxFileSystem *m_FS; + // handlers stack used by PushTagHandler and PopTagHandler + wxList *m_HandlersStack; + + // entity parse + wxHtmlEntitiesParser *m_entitiesParser; }; - - - -//-------------------------------------------------------------------------------- -// wxHtmlTagHandler -// This class (and derived classes) cooperates with wxHtmlParser. -// 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) -// 2. Parser parses source between starting and ending tag -// 3. Handler restores original state of the parser -//-------------------------------------------------------------------------------- - +// This class (and derived classes) cooperates with wxHtmlParser. +// 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) +// 2. Parser parses source between starting and ending tag +// 3. Handler restores original state of the parser class WXDLLEXPORT wxHtmlTagHandler : public wxObject { DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler) - protected: - wxHtmlParser *m_Parser; - - public: - wxHtmlTagHandler() : wxObject () {m_Parser = NULL;}; - - virtual void SetParser(wxHtmlParser *parser) {m_Parser = parser;} - // Sets the parser. - // 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 wxString GetSupportedTags() = 0; - // Returns list of supported tags. The list is in uppercase and - // tags are delimited by ','. - // Example : "I,B,FONT,P" - // is capable of handling italic, bold, font and paragraph tags - - virtual bool HandleTag(const wxHtmlTag& tag) = 0; - // 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 - - protected: - void ParseInner(const wxHtmlTag& tag) {m_Parser -> DoParsing(tag.GetBeginPos(), tag.GetEndPos1());} - // parses input between beginning and ending tag. - // m_Parser must be set. +public: + wxHtmlTagHandler() : wxObject () { m_Parser = NULL; } + + // Sets the parser. + // 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) + { m_Parser = parser; } + + // Returns list of supported tags. The list is in uppercase and + // tags are delimited by ','. + // Example : "I,B,FONT,P" + // is capable of handling italic, bold, font and paragraph tags + virtual wxString GetSupportedTags() = 0; + + // 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 + 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()); } + + wxHtmlParser *m_Parser; }; +// This class is used to parse HTML entities in strings. It can handle +// both named entities and &#xxxx entries where xxxx is Unicode code. +class WXDLLEXPORT wxHtmlEntitiesParser : public wxObject +{ + DECLARE_DYNAMIC_CLASS(wxHtmlEntitiesParser) + +public: + wxHtmlEntitiesParser(); + virtual ~wxHtmlEntitiesParser(); + + // Sets encoding of output string. + // Has no effect if wxUSE_WCHAR_T==0 or wxUSE_UNICODE==1 + void SetEncoding(wxFontEncoding encoding); + + // Parses entities in input and replaces them with respective characters + // (with respect to output encoding) + wxString Parse(const wxString& input); + + // Returns character for given entity or 0 if the enity is unknown + wxChar GetEntityChar(const wxString& entity); + + // Returns character that represents given Unicode code + wxChar GetCharForCode(unsigned code); + +protected: +#if wxUSE_WCHAR_T && !wxUSE_UNICODE + wxMBConv *m_conv; + wxFontEncoding m_encoding; +#endif +}; #endif