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