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();
@@ -92,13 +107,41 @@ public:
wxString* GetSource() {return &m_Source;}
void SetSource(const wxString& src);
+ // 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
+ // 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; }
+
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 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.
@@ -108,12 +151,15 @@ protected:
virtual void AddTag(const wxHtmlTag& tag);
protected:
- // source being parsed
+ // DOM tree:
+ wxHtmlTag *m_CurTag;
+ wxHtmlTag *m_Tags;
+ wxHtmlTextPieces *m_TextPieces;
+ size_t m_CurTextPiece;
+
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.
@@ -125,30 +171,32 @@ protected:
// 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;
-};
-
-
+ // entity parse
+ wxHtmlEntitiesParser *m_entitiesParser;
+ // flag indicating that the parser should stop
+ bool m_stopParsing;
+};
-//--------------------------------------------------------------------------------
-// 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
-//--------------------------------------------------------------------------------
-class WXDLLEXPORT wxHtmlTagHandler : public wxObject
+// 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 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
{
DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler)
@@ -159,7 +207,7 @@ 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.
- virtual void SetParser(wxHtmlParser *parser)
+ virtual void SetParser(wxHtmlParser *parser)
{ m_Parser = parser; }
// Returns list of supported tags. The list is in uppercase and
@@ -170,20 +218,64 @@ 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)
+ void ParseInner(const wxHtmlTag& tag)
{ m_Parser->DoParsing(tag.GetBeginPos(), tag.GetEndPos1()); }
+ // 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)
};
+// 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 WXDLLIMPEXP_HTML 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
+#if wxUSE_UNICODE
+ wxChar GetCharForCode(unsigned code) { return (wxChar)code; }
+#else
+ wxChar GetCharForCode(unsigned code);
+#endif
+
+protected:
+#if wxUSE_WCHAR_T && !wxUSE_UNICODE
+ wxMBConv *m_conv;
+ wxFontEncoding m_encoding;
+#endif
+
+ DECLARE_NO_COPY_CLASS(wxHtmlEntitiesParser)
+};
#endif