1. added support for bitmaps with alpha channel

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

diff --git a/include/wx/html/htmlpars.h b/include/wx/html/htmlpars.h
index aef73949fb4a282cf6071c7d82d83d958cdb0cfc..29b41ec567bd94cf482746cb9e3bd437a074562a 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
-// Licence:     wxWindows Licence
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 
 #ifndef _WX_HTMLPARS_H_
 #define _WX_HTMLPARS_H_
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma interface "htmlpars.h"
 #endif
 
@@ -23,19 +23,27 @@
 #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.
-class WXDLLEXPORT wxHtmlParser : public wxObject
+class WXDLLIMPEXP_HTML wxHtmlParser : public wxObject
 {
     DECLARE_ABSTRACT_CLASS(wxHtmlParser)
 
@@ -48,6 +56,10 @@ public:
 
     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);
@@ -60,6 +72,9 @@ 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; }
 
     // Parses the m_Source from begin_pos to end_pos-1.
     // (in noparams version it parses whole m_Source)
@@ -105,6 +120,14 @@ public:
     // 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:
     // DOM structure
@@ -127,9 +150,6 @@ protected:
     // 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:
@@ -154,6 +174,8 @@ protected:
     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
@@ -161,6 +183,9 @@ protected:
     
     // entity parse
     wxHtmlEntitiesParser *m_entitiesParser;
+    
+    // flag indicating that the parser should stop
+    bool m_stopParsing;
 };
 
 
@@ -172,7 +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
-class WXDLLEXPORT wxHtmlTagHandler : public wxObject
+class WXDLLIMPEXP_HTML wxHtmlTagHandler : public wxObject
 {
     DECLARE_ABSTRACT_CLASS(wxHtmlTagHandler)
 
@@ -205,12 +230,14 @@ protected:
         { 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.
-class WXDLLEXPORT wxHtmlEntitiesParser : public wxObject
+class WXDLLIMPEXP_HTML wxHtmlEntitiesParser : public wxObject
 {
     DECLARE_DYNAMIC_CLASS(wxHtmlEntitiesParser)
 
@@ -226,17 +253,23 @@ public:
     // (with respect to output encoding)
     wxString Parse(const wxString& input);
 
-    // Returns character for given entity
+    // 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)
 };