wxBestHelpController now used as default on Windows

[wxWidgets.git] / include / wx / html / htmlpars.h

diff --git a/include/wx/html/htmlpars.h b/include/wx/html/htmlpars.h
index 238a86c7044f40b07ac0f9690bdcdb0aca7cd2a7..d0392418b29cd8e2dea8e92d3ef2edd2998f1843 100644 (file)
--- a/include/wx/html/htmlpars.h
+++ b/include/wx/html/htmlpars.h
@@ -4,14 +4,14 @@
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik
 // Author:      Vaclav Slavik
 // RCS-ID:      $Id$
 // Copyright:   (c) 1999 Vaclav Slavik

-// Licence:     wxWindows Licence
+// Licence:     wxWindows licence

 /////////////////////////////////////////////////////////////////////////////
 
 
 #ifndef _WX_HTMLPARS_H_
 #define _WX_HTMLPARS_H_
 
 /////////////////////////////////////////////////////////////////////////////
 
 
 #ifndef _WX_HTMLPARS_H_
 #define _WX_HTMLPARS_H_
 

-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)

 #pragma interface "htmlpars.h"
 #endif
 
 #pragma interface "htmlpars.h"
 #endif
 


@@ -20,17 +20,30 @@
 
 #include "wx/html/htmltag.h"
 #include "wx/filesys.h"
 
 #include "wx/html/htmltag.h"
 #include "wx/filesys.h"

+#include "wx/hash.h"
+#include "wx/fontenc.h"

 
 

-class WXDLLEXPORT wxMBConv;
-class WXDLLEXPORT wxHtmlParser;
-class WXDLLEXPORT wxHtmlTagHandler;
-class WXDLLEXPORT wxHtmlEntitiesParser;
+class WXDLLIMPEXP_BASE wxMBConv;
+class WXDLLIMPEXP_HTML wxHtmlParser;
+class WXDLLIMPEXP_HTML wxHtmlTagHandler;
+class WXDLLIMPEXP_HTML wxHtmlEntitiesParser;
+
+class wxHtmlTextPieces;
+class wxHtmlParserState;
+
+
+enum wxHtmlURLType
+{
+    wxHTML_URL_PAGE,
+    wxHTML_URL_IMAGE,
+    wxHTML_URL_OTHER
+};

 
 // 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.
 
 // 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
+class WXDLLIMPEXP_HTML wxHtmlParser : public wxObject

 {
     DECLARE_ABSTRACT_CLASS(wxHtmlParser)
 
 {
     DECLARE_ABSTRACT_CLASS(wxHtmlParser)
 


@@ -43,6 +56,10 @@ public:
 
     wxFileSystem* GetFS() const { return m_FS; }
 
 
     wxFileSystem* GetFS() const { return m_FS; }
 

+    // Opens file if the parser is allowed to open given URL (may be forbidden
+    // 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);
     // You can simply call this method when you need parsed output.
     // This method does these things:
     // 1. call InitParser(source);


@@ -56,10 +73,16 @@ public:
     // This must be called after Parse().
     virtual void DoneParser();
 
     // 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; }
+

     // 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);
     // 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);

-    inline void DoParsing() {DoParsing(0, m_Source.Length());};
+    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
 
     // Returns product of parsing
     // Returned value is result of parsing of the part. The type of this result


@@ -70,7 +93,7 @@ public:
     // adds handler to the list & hash table of handlers.
     virtual void AddTagHandler(wxHtmlTagHandler *handler);
 
     // 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:
     //   <myitems>
     // The handler should already be in use by this parser.
     // Example: you want to parse following pseudo-html structure:
     //   <myitems>


@@ -89,13 +112,37 @@ public:
     wxString* GetSource() {return &m_Source;}
     void SetSource(const wxString& src);
 
     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, <pre> handler replaces spaces with &nbsp;
+    // and newlines with <br>)
+    virtual void SetSourceAndSaveState(const wxString& src);
+    // Restores parser's state from stack or returns false if the stack is
+    // empty
+    virtual bool RestoreState();
+
+    // Parses HTML string 'markup' and extracts charset info from <meta> 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; }
+

 protected:
 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
     // 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 char* txt) = 0;
+    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.
 
     // Adds tag and proceeds it. Parse() may (and usually is) called from this method.
     // This is called from Parse() and may be overriden.


@@ -103,17 +150,17 @@ protected:
     // ignored if no hander is found.
     // Derived class is *responsible* for filling in m_Handlers table.
     virtual void AddTag(const wxHtmlTag& tag);
     // 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:
 
 protected:

-    // source being parsed
+    // DOM tree:
+    wxHtmlTag *m_CurTag;
+    wxHtmlTag *m_Tags;
+    wxHtmlTextPieces *m_TextPieces;
+    size_t m_CurTextPiece;
+

     wxString m_Source;
 
     wxString m_Source;
 

-    // tags cache, used during parsing.
-    wxHtmlTagsCache *m_Cache;
-    wxHashTable m_HandlersHash;
+    wxHtmlParserState *m_SavedStates;

 
     // handlers that handle particular tags. The table is accessed by
     // key = tag's name.
 
     // handlers that handle particular tags. The table is accessed by
     // key = tag's name.


@@ -125,14 +172,20 @@ protected:
     // m_HandlersList is list of all handlers and it is guaranteed to contain
     //      only one reference to each handler instance.
     wxList m_HandlersList;
     // 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;
+
+    DECLARE_NO_COPY_CLASS(wxHtmlParser)

 
     // class for opening files (file system)
     wxFileSystem *m_FS;
     // handlers stack used by PushTagHandler and PopTagHandler
     wxList *m_HandlersStack;
 
     // class for opening files (file system)
     wxFileSystem *m_FS;
     // handlers stack used by PushTagHandler and PopTagHandler
     wxList *m_HandlersStack;

-    
+

     // entity parse
     wxHtmlEntitiesParser *m_entitiesParser;
     // entity parse
     wxHtmlEntitiesParser *m_entitiesParser;

+
+    // flag indicating that the parser should stop
+    bool m_stopParsing;

 };
 
 
 };
 
 


@@ -144,7 +197,7 @@ protected:
 //    (using it's public methods)
 // 2. Parser parses source between starting and ending tag
 // 3. Handler restores original state of the 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
+class WXDLLIMPEXP_HTML wxHtmlTagHandler : public wxObject

 {
     DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler)
 
 {
     DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler)
 


@@ -155,7 +208,7 @@ 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.
     // 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; }
 
     // Returns list of supported tags. The list is in uppercase and
         { m_Parser = parser; }
 
     // Returns list of supported tags. The list is in uppercase and


@@ -166,46 +219,57 @@ public:
 
     // This is hadling core method. It does all the Steps 1-3.
     // To process step 2, you can call ParseInner()
 
     // 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.
     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) 
+    void ParseInner(const wxHtmlTag& tag)

         { m_Parser->DoParsing(tag.GetBeginPos(), tag.GetEndPos1()); }
 
     wxHtmlParser *m_Parser;
         { m_Parser->DoParsing(tag.GetBeginPos(), tag.GetEndPos1()); }
 
     wxHtmlParser *m_Parser;

+
+    DECLARE_NO_COPY_CLASS(wxHtmlTagHandler)

 };
 
 
 // This class is used to parse HTML entities in strings. It can handle
 // both named entities and &#xxxx entries where xxxx is Unicode code.
 };
 
 
 // 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
+class WXDLLIMPEXP_HTML wxHtmlEntitiesParser : public wxObject

 {
     DECLARE_DYNAMIC_CLASS(wxHtmlEntitiesParser)
 
 public:
     wxHtmlEntitiesParser();
     virtual ~wxHtmlEntitiesParser();
 {
     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);
     // 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);
     // Parses entities in input and replaces them with respective characters
     // (with respect to output encoding)
     wxString Parse(const wxString& input);

-    
-protected:
+
+    // Returns character for given entity or 0 if the enity is unknown

     wxChar GetEntityChar(const wxString& entity);
     wxChar GetEntityChar(const wxString& entity);

+
+    // Returns character that represents given Unicode code
+#if wxUSE_UNICODE
+    wxChar GetCharForCode(unsigned code) { return (wxChar)code; }
+#else

     wxChar GetCharForCode(unsigned code);
     wxChar GetCharForCode(unsigned code);

+#endif

 
 

+protected:

 #if wxUSE_WCHAR_T && !wxUSE_UNICODE
     wxMBConv *m_conv;
     wxFontEncoding m_encoding;
 #endif
 #if wxUSE_WCHAR_T && !wxUSE_UNICODE
     wxMBConv *m_conv;
     wxFontEncoding m_encoding;
 #endif

+
+    DECLARE_NO_COPY_CLASS(wxHtmlEntitiesParser)

 };
 
 
 };