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