include/wx/html/htmlwin.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlwin.h
   3 // Purpose:     wxHtmlWindow class for parsing & displaying HTML
   4 // Author:      Vaclav Slavik
   5 // Copyright:   (c) 1999 Vaclav Slavik
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9
  10 #ifndef __HTMLWIN_H__
  11 #define __HTMLWIN_H__
  12
  13 #ifdef __GNUG__
  14 #pragma interface
  15 #endif
  16
  17 #include "wx/defs.h"
  18 #if wxUSE_HTML
  19
  20 #include <wx/window.h>
  21 #include <wx/config.h>
  22 #include <wx/treectrl.h>
  23 #include <wx/html/htmlwinparser.h>
  24 #include <wx/html/htmlcell.h>
  25 #include <wx/filesys.h>
  26 #include <wx/html/htmlfilter.h>
  27
  28
  29 //--------------------------------------------------------------------------------
  30 // wxHtmlWindow
  31 //                  (This is probably the only class you will directly use.)
  32 //                  Purpose of this class is to display HTML page (either local
  33 //                  file or downloaded via HTTP protocol) in a window. Width
  34 //                  of window is constant - given in constructor - virtual height
  35 //                  is changed dynamicly depending on page size.
  36 //                  Once the window is created you can set it's content by calling
  37 //                  SetPage(text) or LoadPage(filename).
  38 //--------------------------------------------------------------------------------
  39
  40
  41 // item of history list
  42 class WXDLLEXPORT HtmlHistoryItem : public wxObject
  43 {
  44     private:
  45         wxString m_Page;
  46         wxString m_Anchor;
  47         int m_Pos;
  48
  49     public:
  50         HtmlHistoryItem(const wxString& p, const wxString& a) {m_Page = p, m_Anchor = a, m_Pos = 0;}
  51         int GetPos() const {return m_Pos;}
  52         void SetPos(int p) {m_Pos = p;}
  53         const wxString& GetPage() const {return m_Page;}
  54         const wxString& GetAnchor() const {return m_Anchor;}
  55 };
  56
  57 #undef WXDLLEXPORTLOCAL
  58 #define WXDLLEXPORTLOCAL WXDLLEXPORT
  59      // ?? Don't know why - but Allen Van Sickel reported it to fix problems with DLL
  60
  61 WX_DECLARE_OBJARRAY(HtmlHistoryItem, HtmlHistoryArray);
  62
  63 #undef WXDLLEXPORTLOCAL
  64 #define WXDLLEXPORTLOCAL
  65
  66
  67 class WXDLLEXPORT wxHtmlWindow : public wxScrolledWindow
  68 {
  69     DECLARE_DYNAMIC_CLASS(wxHtmlWindow)
  70
  71     protected:
  72         wxHtmlContainerCell *m_Cell;
  73                 // This is pointer to the first cell in parsed data.
  74                 // (Note: the first cell is usually top one = all other cells are sub-cells of this one)
  75         wxHtmlWinParser *m_Parser;
  76                 // parser which is used to parse HTML input.
  77                 // Each wxHtmlWindow has it's own parser because sharing one global
  78                 // parser would be problematic (because of reentrancy)
  79         wxString m_OpenedPage;
  80                 // contains name of actualy opened page or empty string if no page opened
  81         wxString m_OpenedAnchor;
  82                 // contains name of current anchor within m_OpenedPage
  83         wxFileSystem* m_FS;
  84                 // class for opening files (file system)
  85
  86         wxFrame *m_RelatedFrame;
  87         wxString m_TitleFormat;
  88         int m_RelatedStatusBar;
  89                 // frame in which page title should be displayed & number of it's statusbar
  90                 // reserved for usage with this html window
  91
  92         int m_Borders;
  93                 // borders (free space between text and window borders)
  94                 // defaults to 10 pixels.
  95
  96         bool m_Scrollable;
  97                 // TRUE if you can scroll the window.
  98                 // If it is FALSE you can't scroll the window even if it's contents is larger
  99                 // than window.
 100
 101
 102     private:
 103         bool m_tmpMouseMoved;
 104                 // a flag indicated if mouse moved
 105                 // (if TRUE we will try to change cursor in last call to OnIdle)
 106         bool m_tmpCanDraw;
 107                 // if FALSE contents of the window is not redrawn
 108                 // (in order to avoid ugly bliking)
 109
 110         static wxList m_Filters;
 111                 // list of HTML filters
 112         static wxHtmlFilter *m_DefaultFilter;
 113                 // this filter is used when no filter is able to read some file
 114
 115         HtmlHistoryArray m_History;
 116         int m_HistoryPos;
 117                 // browser history
 118         bool m_HistoryOn;
 119                 // if this FLAG is false, items are not added to history
 120
 121     public:
 122         wxHtmlWindow() : wxScrolledWindow() {};
 123         wxHtmlWindow(wxWindow *parent, wxWindowID id = -1,
 124                      const wxPoint& pos = wxDefaultPosition, const wxSize& size = wxDefaultSize,
 125                      const wxString& name = "htmlWindow", bool scrollable = TRUE);
 126         ~wxHtmlWindow();
 127
 128         bool SetPage(const wxString& source);
 129                 // Set HTML page and display it. !! source is HTML document itself,
 130                 // it is NOT address/filename of HTML document. If you want to
 131                 // specify document location, use LoadPage() istead
 132                 // Return value : FALSE if an error occured, TRUE otherwise
 133
 134         bool LoadPage(const wxString& location);
 135                 // Load HTML page from given location. Location can be either
 136                 // a) /usr/wxGTK2/docs/html/wx.htm
 137                 // b) http://www.somewhere.uk/document.htm
 138                 // c) ftp://ftp.somesite.cz/pub/something.htm
 139                 // In case there is no prefix (http:,ftp:), the method
 140                 // will try to find it itself (1. local file, then http or ftp)
 141                 // After the page is loaded, the method calls SetPage() to display it.
 142                 // Note : you can also use path relative to previously loaded page
 143                 // Return value : same as SetPage
 144
 145         wxString GetOpenedPage() const {return m_OpenedPage;}
 146                 // Returns full location of opened page
 147
 148         void SetRelatedFrame(wxFrame* frame, const wxString& format);
 149                 // sets frame in which page title will  be displayed. Format is format of
 150                 // frame title, e.g. "HtmlHelp : %s". It must contain exactly one %s
 151         wxFrame* GetRelatedFrame() const {return m_RelatedFrame;}
 152
 153         void SetRelatedStatusBar(int bar);
 154                 // after(!) calling SetRelatedFrame, this sets statusbar slot where messages
 155                 // will be displayed. Default is -1 = no messages.
 156
 157         void SetFonts(wxString normal_face, int normal_italic_mode, wxString fixed_face, int fixed_italic_mode, int *sizes);
 158                 // sets fonts to be used when displaying HTML page.
 159                 // *_italic_mode can be either wxSLANT or wxITALIC
 160
 161         void SetTitle(const wxString& title);
 162                 // Sets the title of the window
 163                 // (depending on the information passed to SetRelatedFrame() method)
 164
 165         void SetBorders(int b) {m_Borders = b;}
 166                 // Sets space between text and window borders.
 167
 168         virtual void ReadCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
 169                 // saves custom settings into cfg config. it will use the path 'path'
 170                 // if given, otherwise it will save info into currently selected path.
 171                 // saved values : things set by SetFonts, SetBorders.
 172         virtual void WriteCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
 173                 // ...
 174
 175         bool HistoryBack();
 176         bool HistoryForward();
 177                 // Goes to previous/next page (in browsing history)
 178                 // Returns TRUE if successful, FALSE otherwise
 179         void HistoryClear();
 180                 // Resets history
 181
 182         wxHtmlContainerCell* GetInternalRepresentation() const {return m_Cell;}
 183                 // Returns pointer to conteiners/cells structure.
 184                 // It should be used ONLY when printing
 185
 186         static void AddFilter(wxHtmlFilter *filter);
 187                 // Adds input filter
 188
 189         virtual void OnLinkClicked(const wxString& link);
 190                 // called when users clicked on hypertext link. Default behavior is to
 191                 // call LoadPage(loc)
 192
 193         static void CleanUpStatics();
 194                 // cleans static variables
 195
 196     protected:
 197         bool ScrollToAnchor(const wxString& anchor);
 198                 // Scrolls to anchor of this name. (Anchor is #news
 199                 // or #features etc. it is part of address sometimes:
 200                 // http://www.ms.mff.cuni.cz/~vsla8348/wxhtml/index.html#news)
 201                 // Return value : TRUE if anchor exists, FALSE otherwise
 202
 203         void CreateLayout();
 204                 // prepare layout (= fill m_PosX, m_PosY for fragments) based on actual size of
 205                 // window. This method also setup scrollbars
 206
 207         void OnDraw(wxDC& dc);
 208         void OnSize(wxSizeEvent& event);
 209         void OnMouseEvent(wxMouseEvent& event);
 210         void OnIdle(wxIdleEvent& event);
 211         void OnKeyDown(wxKeyEvent& event);
 212
 213         virtual wxHtmlFilter *GetDefaultFilter() {return new wxHtmlFilterPlainText;}
 214                 // returns new filter (will be stored into m_DefaultFilter variable)
 215
 216     DECLARE_EVENT_TABLE()
 217 };
 218
 219
 220
 221 #endif // __HTMLWIN_H__
 222
 223 #endif
 224
 225
 226