include/wx/html/htmlwin.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        htmlwin.h
   3 // Purpose:     wxHtmlWindow class for parsing & displaying HTML
   4 // Author:      Vaclav Slavik
   5 // RCS-ID:      $Id$
   6 // Copyright:   (c) 1999 Vaclav Slavik
   7 // Licence:     wxWindows Licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10
  11 #ifndef _WX_HTMLWIN_H_
  12 #define _WX_HTMLWIN_H_
  13
  14 #ifdef __GNUG__
  15 #pragma interface "htmlwin.h"
  16 #endif
  17
  18 #include "wx/defs.h"
  19 #if wxUSE_HTML
  20
  21 #include "wx/window.h"
  22 #include "wx/scrolwin.h"
  23 #include "wx/config.h"
  24 #include "wx/treectrl.h"
  25 #include "wx/html/winpars.h"
  26 #include "wx/html/htmlcell.h"
  27 #include "wx/filesys.h"
  28 #include "wx/html/htmlfilt.h"
  29
  30 class wxHtmlProcessor;
  31 class wxHtmlWinModule;
  32 class wxHtmlHistoryArray;
  33 class wxHtmlProcessorList;
  34
  35
  36 // wxHtmlWindow flags:
  37 #define wxHW_SCROLLBAR_NEVER    0x0002
  38 #define wxHW_SCROLLBAR_AUTO     0x0004
  39
  40 // enums for wxHtmlWindow::OnOpeningURL
  41 enum wxHtmlOpeningStatus
  42 {
  43     wxHTML_OPEN,
  44     wxHTML_BLOCK,
  45     wxHTML_REDIRECT
  46 };
  47
  48 //--------------------------------------------------------------------------------
  49 // wxHtmlWindow
  50 //                  (This is probably the only class you will directly use.)
  51 //                  Purpose of this class is to display HTML page (either local
  52 //                  file or downloaded via HTTP protocol) in a window. Width
  53 //                  of window is constant - given in constructor - virtual height
  54 //                  is changed dynamicly depending on page size.
  55 //                  Once the window is created you can set it's content by calling
  56 //                  SetPage(text) or LoadPage(filename).
  57 //--------------------------------------------------------------------------------
  58
  59 class WXDLLEXPORT wxHtmlWindow : public wxScrolledWindow
  60 {
  61     DECLARE_DYNAMIC_CLASS(wxHtmlWindow)
  62     friend class wxHtmlWinModule;
  63
  64 public:
  65     wxHtmlWindow() { Init(); }
  66     wxHtmlWindow(wxWindow *parent, wxWindowID id = -1,
  67                  const wxPoint& pos = wxDefaultPosition,
  68                  const wxSize& size = wxDefaultSize,
  69                  long style = wxHW_SCROLLBAR_AUTO,
  70                  const wxString& name = wxT("htmlWindow"))
  71     {
  72         Init();
  73         Create(parent, id, pos, size, style, name);
  74     }
  75     ~wxHtmlWindow();
  76
  77     bool Create(wxWindow *parent, wxWindowID id = -1,
  78                 const wxPoint& pos = wxDefaultPosition,
  79                 const wxSize& size = wxDefaultSize,
  80                 long style = wxHW_SCROLLBAR_AUTO,
  81                 const wxString& name = wxT("htmlWindow"));
  82
  83     // Set HTML page and display it. !! source is HTML document itself,
  84     // it is NOT address/filename of HTML document. If you want to
  85     // specify document location, use LoadPage() istead
  86     // Return value : FALSE if an error occured, TRUE otherwise
  87     bool SetPage(const wxString& source);
  88
  89     // Append to current page
  90     bool AppendToPage(const wxString& source);
  91
  92     // Load HTML page from given location. Location can be either
  93     // a) /usr/wxGTK2/docs/html/wx.htm
  94     // b) http://www.somewhere.uk/document.htm
  95     // c) ftp://ftp.somesite.cz/pub/something.htm
  96     // In case there is no prefix (http:,ftp:), the method
  97     // will try to find it itself (1. local file, then http or ftp)
  98     // After the page is loaded, the method calls SetPage() to display it.
  99     // Note : you can also use path relative to previously loaded page
 100     // Return value : same as SetPage
 101     virtual bool LoadPage(const wxString& location);
 102
 103     // Returns full location of opened page
 104     wxString GetOpenedPage() const {return m_OpenedPage;}
 105     // Returns anchor within opened page
 106     wxString GetOpenedAnchor() const {return m_OpenedAnchor;}
 107     // Returns <TITLE> of opened page or empty string otherwise
 108     wxString GetOpenedPageTitle() const {return m_OpenedPageTitle;}
 109
 110     // Sets frame in which page title will  be displayed. Format is format of
 111     // frame title, e.g. "HtmlHelp : %s". It must contain exactly one %s
 112     void SetRelatedFrame(wxFrame* frame, const wxString& format);
 113     wxFrame* GetRelatedFrame() const {return m_RelatedFrame;}
 114
 115     // After(!) calling SetRelatedFrame, this sets statusbar slot where messages
 116     // will be displayed. Default is -1 = no messages.
 117     void SetRelatedStatusBar(int bar);
 118
 119     // Sets fonts to be used when displaying HTML page.
 120     void SetFonts(wxString normal_face, wxString fixed_face, const int *sizes);
 121
 122     // Sets space between text and window borders.
 123     void SetBorders(int b) {m_Borders = b;}
 124
 125     // Saves custom settings into cfg config. it will use the path 'path'
 126     // if given, otherwise it will save info into currently selected path.
 127     // saved values : things set by SetFonts, SetBorders.
 128     virtual void ReadCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
 129     // ...
 130     virtual void WriteCustomization(wxConfigBase *cfg, wxString path = wxEmptyString);
 131
 132     // Goes to previous/next page (in browsing history)
 133     // Returns TRUE if successful, FALSE otherwise
 134     bool HistoryBack();
 135     bool HistoryForward();
 136     bool HistoryCanBack();
 137     bool HistoryCanForward();
 138     // Resets history
 139     void HistoryClear();
 140
 141     // Returns pointer to conteiners/cells structure.
 142     // It should be used ONLY when printing
 143     wxHtmlContainerCell* GetInternalRepresentation() const {return m_Cell;}
 144
 145     // Adds input filter
 146     static void AddFilter(wxHtmlFilter *filter);
 147
 148     // Returns a pointer to the parser.
 149     wxHtmlWinParser *GetParser() const { return m_Parser; }
 150
 151     // Adds HTML processor to this instance of wxHtmlWindow:
 152     void AddProcessor(wxHtmlProcessor *processor);
 153     // Adds HTML processor to wxHtmlWindow class as whole:
 154     static void AddGlobalProcessor(wxHtmlProcessor *processor);
 155
 156     // what would we do with it?
 157     virtual bool AcceptsFocusFromKeyboard() const { return FALSE; }
 158
 159     // -- Callbacks --
 160
 161     // Sets the title of the window
 162     // (depending on the information passed to SetRelatedFrame() method)
 163     virtual void OnSetTitle(const wxString& title);
 164
 165     // Called when the mouse hovers over a cell: (x, y) are logical coords
 166     // Default behaviour is to do nothing at all
 167     virtual void OnCellMouseHover(wxHtmlCell *cell, wxCoord x, wxCoord y);
 168
 169     // Called when user clicks on a cell. Default behavior is to call
 170     // OnLinkClicked() if this cell corresponds to a hypertext link
 171     virtual void OnCellClicked(wxHtmlCell *cell,
 172                                wxCoord x, wxCoord y,
 173                                const wxMouseEvent& event);
 174
 175     // Called when user clicked on hypertext link. Default behavior is to
 176     // call LoadPage(loc)
 177     virtual void OnLinkClicked(const wxHtmlLinkInfo& link);
 178
 179     // Called when wxHtmlWindow wants to fetch data from an URL (e.g. when
 180     // loading a page or loading an image). The data are downloaded if and only if
 181     // OnOpeningURL returns TRUE. If OnOpeningURL returns wxHTML_REDIRECT,
 182     // it must set *redirect to the new URL
 183     virtual wxHtmlOpeningStatus OnOpeningURL(wxHtmlURLType WXUNUSED(type),
 184                                              const wxString& WXUNUSED(url),
 185                                              wxString *WXUNUSED(redirect)) const
 186         { return wxHTML_OPEN; }
 187
 188 protected:
 189     void Init();
 190
 191     // Scrolls to anchor of this name. (Anchor is #news
 192     // or #features etc. it is part of address sometimes:
 193     // http://www.ms.mff.cuni.cz/~vsla8348/wxhtml/index.html#news)
 194     // Return value : TRUE if anchor exists, FALSE otherwise
 195     bool ScrollToAnchor(const wxString& anchor);
 196
 197     // Prepares layout (= fill m_PosX, m_PosY for fragments) based on
 198     // actual size of window. This method also setup scrollbars
 199     void CreateLayout();
 200
 201     void OnDraw(wxDC& dc);
 202     void OnSize(wxSizeEvent& event);
 203     void OnMouseEvent(wxMouseEvent& event);
 204     void OnIdle(wxIdleEvent& event);
 205
 206     // Returns new filter (will be stored into m_DefaultFilter variable)
 207     virtual wxHtmlFilter *GetDefaultFilter() {return new wxHtmlFilterPlainText;}
 208
 209     // cleans static variables
 210     static void CleanUpStatics();
 211
 212 protected:
 213     // This is pointer to the first cell in parsed data.
 214     // (Note: the first cell is usually top one = all other cells are sub-cells of this one)
 215     wxHtmlContainerCell *m_Cell;
 216     // parser which is used to parse HTML input.
 217     // Each wxHtmlWindow has it's own parser because sharing one global
 218     // parser would be problematic (because of reentrancy)
 219     wxHtmlWinParser *m_Parser;
 220     // contains name of actualy opened page or empty string if no page opened
 221     wxString m_OpenedPage;
 222     // contains name of current anchor within m_OpenedPage
 223     wxString m_OpenedAnchor;
 224     // contains title of actualy opened page or empty string if no <TITLE> tag
 225     wxString m_OpenedPageTitle;
 226     // class for opening files (file system)
 227     wxFileSystem* m_FS;
 228
 229     wxFrame *m_RelatedFrame;
 230     wxString m_TitleFormat;
 231     // frame in which page title should be displayed & number of it's statusbar
 232     // reserved for usage with this html window
 233     int m_RelatedStatusBar;
 234
 235     // borders (free space between text and window borders)
 236     // defaults to 10 pixels.
 237     int m_Borders;
 238
 239     int m_Style;
 240
 241 private:
 242     // a flag indicated if mouse moved
 243     // (if TRUE we will try to change cursor in last call to OnIdle)
 244     bool m_tmpMouseMoved;
 245     // contains last link name
 246     wxHtmlLinkInfo *m_tmpLastLink;
 247     // contains the last (terminal) cell which contained the mouse
 248     wxHtmlCell *m_tmpLastCell;
 249     // if >0 contents of the window is not redrawn
 250     // (in order to avoid ugly blinking)
 251     int m_tmpCanDrawLocks;
 252
 253     // list of HTML filters
 254     static wxList m_Filters;
 255     // this filter is used when no filter is able to read some file
 256     static wxHtmlFilter *m_DefaultFilter;
 257
 258     static wxCursor *s_cur_hand;
 259     static wxCursor *s_cur_arrow;
 260
 261     wxHtmlHistoryArray *m_History;
 262     // browser history
 263     int m_HistoryPos;
 264     // if this FLAG is false, items are not added to history
 265     bool m_HistoryOn;
 266
 267     // html processors array:
 268     wxHtmlProcessorList *m_Processors;
 269     static wxHtmlProcessorList *m_GlobalProcessors;
 270
 271     DECLARE_EVENT_TABLE()
 272 };
 273
 274
 275 #endif
 276
 277 #endif // _WX_HTMLWIN_H_
 278