From 6c62a62bf732e57dfb39f303f61d92bcc6b404f0 Mon Sep 17 00:00:00 2001
From: =?utf8?q?V=C3=A1clav=20Slav=C3=ADk?= <vslavik@fastmail.fm>
Date: Thu, 19 Jul 2001 22:30:22 +0000
Subject: [PATCH] new wxHtmlParser core

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@11111 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 include/wx/html/htmlpars.h | 42 ++++++++++++++++++++++++++++++--------
 include/wx/html/htmltag.h  | 33 +++++++++++++++++++++++-------
 include/wx/html/winpars.h  |  6 ++++--
 3 files changed, 64 insertions(+), 17 deletions(-)

diff --git a/include/wx/html/htmlpars.h b/include/wx/html/htmlpars.h
index 238a86c704..e28657879f 100644
--- a/include/wx/html/htmlpars.h
+++ b/include/wx/html/htmlpars.h
@@ -26,6 +26,9 @@ class WXDLLEXPORT wxHtmlParser;
 class WXDLLEXPORT wxHtmlTagHandler;
 class WXDLLEXPORT wxHtmlEntitiesParser;
 
+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
@@ -59,7 +62,10 @@ public:
     // 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
@@ -88,14 +94,30 @@ 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();
 
 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 +130,16 @@ protected:
     wxHtmlEntitiesParser *GetEntitiesParser() const { return m_entitiesParser; }
 
 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
@@ -125,6 +150,7 @@ 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;
 
     // class for opening files (file system)
     wxFileSystem *m_FS;
diff --git a/include/wx/html/htmltag.h b/include/wx/html/htmltag.h
index 3d549e09cd..981f2374e5 100644
--- a/include/wx/html/htmltag.h
+++ b/include/wx/html/htmltag.h
@@ -60,13 +60,26 @@ class WXDLLEXPORT wxHtmlTag : public wxObject
 {
     DECLARE_CLASS(wxHtmlTag)
 
-public:
+protected:
     // constructs wxHtmlTag object based on HTML tag.
     // The tag begins (with '<' character) at position pos in source
     // end_pos is position where parsing ends (usually end of document)
-    wxHtmlTag(const wxString& source, int pos, int end_pos,
+    wxHtmlTag(wxHtmlTag *parent,
+              const wxString& source, int pos, int end_pos,
               wxHtmlTagsCache *cache,
-              wxHtmlEntitiesParser *entParser = NULL);
+              wxHtmlEntitiesParser *entParser);
+    friend class wxHtmlParser;
+public:
+    ~wxHtmlTag();
+
+    wxHtmlTag *GetParent() const {return m_Parent;}
+    wxHtmlTag *GetFirstSibling() const;
+    wxHtmlTag *GetLastSibling() const;
+    wxHtmlTag *GetChildren() const { return m_FirstChild; }
+    wxHtmlTag *GetPreviousSibling() const { return m_Prev; }
+    wxHtmlTag *GetNextSibling() const {return m_Next; }
+    // Return next tag, as if tree had been flattened
+    wxHtmlTag *GetNextTag() const;
 
     // Returns tag's name in uppercase.
     inline wxString GetName() const {return m_Name;}
@@ -99,12 +112,13 @@ public:
     // Returns string containing all params.
     wxString GetAllParams() const;
 
+#if WXWIN_COMPATIBILITY_2_2
     // return TRUE if this is ending tag (</something>) or FALSE
     // if it isn't (<something>)
-    inline bool IsEnding() const {return m_Ending;}
+    inline bool IsEnding() const {return FALSE;}
+#endif
 
-    // return TRUE if this is ending tag (</something>) or FALSE
-    // if it isn't (<something>)
+    // return TRUE if this there is matching ending tag
     inline bool HasEnding() const {return m_End1 >= 0;}
 
     // returns beginning position of _internal_ block of text
@@ -121,8 +135,13 @@ public:
 private:
     wxString m_Name;
     int m_Begin, m_End1, m_End2;
-    bool m_Ending;
     wxArrayString m_ParamNames, m_ParamValues;
+
+    // DOM tree relations:
+    wxHtmlTag *m_Next;
+    wxHtmlTag *m_Prev;
+    wxHtmlTag *m_FirstChild, *m_LastChild;
+    wxHtmlTag *m_Parent;
 };
 
 
diff --git a/include/wx/html/winpars.h b/include/wx/html/winpars.h
index fee91731c2..1b6b02a6d6 100644
--- a/include/wx/html/winpars.h
+++ b/include/wx/html/winpars.h
@@ -123,11 +123,13 @@ public:
     virtual wxFont* CreateCurrentFont();
 
 protected:
-    virtual void AddText(const char *txt);
+    virtual void AddText(const wxChar* txt);
 
 private:
     bool m_tmpLastWasSpace;
-        // temporary variable used by AddText
+    wxChar *m_tmpStrBuf;
+    size_t  m_tmpStrBufSize;
+        // temporary variables used by AddText
     wxWindow *m_Window;
             // window we're parsing for
     double m_PixelScale;
-- 
2.45.2