X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1309ba6c7ec76b4507cf1f2e8656749e3de1befa..d6d6a882d4d8ea0d7ef706a45fa92b96f34c94c7:/include/wx/html/htmlpars.h

diff --git a/include/wx/html/htmlpars.h b/include/wx/html/htmlpars.h
index 272c44ad5e..29b41ec567 100644
--- a/include/wx/html/htmlpars.h
+++ b/include/wx/html/htmlpars.h
@@ -4,15 +4,15 @@
 // 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__
-#pragma interface
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+#pragma interface "htmlpars.h"
 #endif
 
 #include "wx/defs.h"
@@ -20,25 +20,35 @@
 
 #include "wx/html/htmltag.h"
 #include "wx/filesys.h"
+#include "wx/hash.h"
+#include "wx/fontenc.h"
 
-class wxHtmlParser;
-class wxHtmlTagHandler;
+class WXDLLIMPEXP_BASE wxMBConv;
+class WXDLLIMPEXP_HTML wxHtmlParser;
+class WXDLLIMPEXP_HTML wxHtmlTagHandler;
+class WXDLLIMPEXP_HTML 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;
 
-class WXDLLEXPORT wxHtmlParser : public wxObject
+
+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 WXDLLIMPEXP_HTML wxHtmlParser : public wxObject
 {
     DECLARE_ABSTRACT_CLASS(wxHtmlParser)
 
 public:
-    wxHtmlParser() : wxObject(), m_HandlersHash(wxKEY_STRING) 
-        { m_FS = NULL; m_Cache = NULL; m_HandlersStack = NULL; }
+    wxHtmlParser();
     virtual ~wxHtmlParser();
 
     // Sets the class which will be used for opening files
@@ -46,6 +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);
@@ -58,11 +72,17 @@ 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)
     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
@@ -91,14 +111,38 @@ public:
 
     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:
+    // 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.
@@ -108,13 +152,16 @@ protected:
     virtual void AddTag(const wxHtmlTag& tag);
 
 protected:
-    // source being parsed
-    wxString m_Source;
-
-    // tags cache, used during parsing.
-    wxHtmlTagsCache *m_Cache;
-    wxHashTable m_HandlersHash;
+    // 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
@@ -125,30 +172,32 @@ 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 it's 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)
 
@@ -181,9 +230,47 @@ 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 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