release/src/router/libncurses/c++/cursesp.h

   1 // * This makes emacs happy -*-Mode: C++;-*-
   2 /****************************************************************************
   3  * Copyright (c) 1998-2012,2014 Free Software Foundation, Inc.              *
   4  *                                                                          *
   5  * Permission is hereby granted, free of charge, to any person obtaining a  *
   6  * copy of this software and associated documentation files (the            *
   7  * "Software"), to deal in the Software without restriction, including      *
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   9  * distribute, distribute with modifications, sublicense, and/or sell       *
  10  * copies of the Software, and to permit persons to whom the Software is    *
  11  * furnished to do so, subject to the following conditions:                 *
  12  *                                                                          *
  13  * The above copyright notice and this permission notice shall be included  *
  14  * in all copies or substantial portions of the Software.                   *
  15  *                                                                          *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
  17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
  18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
  19  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
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  22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
  23  *                                                                          *
  24  * Except as contained in this notice, the name(s) of the above copyright   *
  25  * holders shall not be used in advertising or otherwise to promote the     *
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  27  * authorization.                                                           *
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  29
  30 /****************************************************************************
  31  *   Author: Juergen Pfeifer, 1997                                          *
  32  ****************************************************************************/
  33
  34 #ifndef NCURSES_CURSESP_H_incl
  35 #define NCURSES_CURSESP_H_incl 1
  36
  37 // $Id: cursesp.h,v 1.31 2014/08/09 22:06:26 Adam.Jiang Exp $
  38
  39 #include <cursesw.h>
  40
  41 extern "C" {
  42 #  include <panel.h>
  43 }
  44
  45 class NCURSES_IMPEXP NCursesPanel
  46   : public NCursesWindow
  47 {
  48 protected:
  49   PANEL *p;
  50   static NCursesPanel *dummy;
  51
  52 private:
  53   // This structure is used for the panel's user data field to link the
  54   // PANEL* to the C++ object and to provide extra space for a user pointer.
  55   typedef struct {
  56     void*               m_user;      // the pointer for the user's data
  57     const NCursesPanel* m_back;      // backward pointer to C++ object
  58     const PANEL*        m_owner;     // the panel itself
  59   } UserHook;
  60
  61   inline UserHook *UserPointer()
  62   {
  63     UserHook* uptr = reinterpret_cast<UserHook*>(
  64                            const_cast<void *>(::panel_userptr (p)));
  65     return uptr;
  66   }
  67
  68   void init();                       // Initialize the panel object
  69
  70 protected:
  71   void set_user(void *user)
  72   {
  73     UserHook* uptr = UserPointer();
  74     if (uptr != 0 && uptr->m_back==this && uptr->m_owner==p) {
  75       uptr->m_user = user;
  76     }
  77   }
  78   // Set the user pointer of the panel.
  79
  80   void *get_user()
  81   {
  82     UserHook* uptr = UserPointer();
  83     void *result = 0;
  84     if (uptr != 0 && uptr->m_back==this && uptr->m_owner==p)
  85       result = uptr->m_user;
  86     return result;
  87   }
  88
  89   void OnError (int err) const THROW2(NCursesException const, NCursesPanelException)
  90   {
  91     if (err==ERR)
  92       THROW(new NCursesPanelException (this, err));
  93   }
  94   // If err is equal to the curses error indicator ERR, an error handler
  95   // is called.
  96
  97   // Get a keystroke. Default implementation calls getch()
  98   virtual int getKey(void);
  99
 100 public:
 101   NCursesPanel(int nlines,
 102                int ncols,
 103                int begin_y = 0,
 104                int begin_x = 0)
 105     : NCursesWindow(nlines,ncols,begin_y,begin_x), p(0)
 106   {
 107     init();
 108   }
 109   // Create a panel with this size starting at the requested position.
 110
 111   NCursesPanel()
 112     : NCursesWindow(::stdscr), p(0)
 113   {
 114     init();
 115   }
 116   // This constructor creates the default Panel associated with the
 117   // ::stdscr window
 118
 119   NCursesPanel& operator=(const NCursesPanel& rhs)
 120   {
 121     if (this != &rhs) {
 122       *this = rhs;
 123       NCursesWindow::operator=(rhs);
 124     }
 125     return *this;
 126   }
 127
 128   NCursesPanel(const NCursesPanel& rhs)
 129     : NCursesWindow(rhs),
 130       p(rhs.p)
 131   {
 132   }
 133
 134   virtual ~NCursesPanel();
 135
 136   // basic manipulation
 137   inline void hide()
 138   {
 139     OnError (::hide_panel(p));
 140   }
 141   // Hide the panel. It stays in the stack but becomes invisible.
 142
 143   inline void show()
 144   {
 145     OnError (::show_panel(p));
 146   }
 147   // Show the panel, i.e. make it visible.
 148
 149   inline void top()
 150   {
 151     OnError (::top_panel(p));
 152   }
 153   // Make this panel the top panel in the stack.
 154
 155   inline void bottom()
 156   {
 157     OnError (::bottom_panel(p));
 158   }
 159   // Make this panel the bottom panel in the stack.
 160   // N.B.: The panel associated with ::stdscr is always on the bottom. So
 161   // actually bottom() makes the panel the first above ::stdscr.
 162
 163   virtual int mvwin(int y, int x)
 164   {
 165     OnError(::move_panel(p, y, x));
 166     return OK;
 167   }
 168
 169   inline bool hidden() const
 170   {
 171     return (::panel_hidden (p) ? TRUE : FALSE);
 172   }
 173   // Return TRUE if the panel is hidden, FALSE otherwise.
 174
 175 /* The functions panel_above() and panel_below() are not reflected in
 176    the NCursesPanel class. The reason for this is, that we cannot
 177    assume that a panel retrieved by those operations is one wrapped
 178    by a C++ class. Although this situation might be handled, we also
 179    need a reverse mapping from PANEL to NCursesPanel which needs some
 180    redesign of the low level stuff. At the moment, we define them in the
 181    interface but they will always produce an error. */
 182   inline NCursesPanel& above() const
 183   {
 184     OnError(ERR);
 185     return *dummy;
 186   }
 187
 188   inline NCursesPanel& below() const
 189   {
 190     OnError(ERR);
 191     return *dummy;
 192   }
 193
 194   // Those two are rewrites of the corresponding virtual members of
 195   // NCursesWindow
 196   virtual int refresh();
 197   // Propagate all panel changes to the virtual screen and update the
 198   // physical screen.
 199
 200   virtual int noutrefresh();
 201   // Propagate all panel changes to the virtual screen.
 202
 203   static void redraw();
 204   // Redraw all panels.
 205
 206   // decorations
 207   virtual void frame(const char* title=NULL,
 208                      const char* btitle=NULL);
 209   // Put a frame around the panel and put the title centered in the top line
 210   // and btitle in the bottom line.
 211
 212   virtual void boldframe(const char* title=NULL,
 213                          const char* btitle=NULL);
 214   // Same as frame(), but use highlighted attributes.
 215
 216   virtual void label(const char* topLabel,
 217                      const char* bottomLabel);
 218   // Put the title centered in the top line and btitle in the bottom line.
 219
 220   virtual void centertext(int row,const char* label);
 221   // Put the label text centered in the specified row.
 222 };
 223
 224 /* We use templates to provide a typesafe mechanism to associate
 225  * user data with a panel. A NCursesUserPanel<T> is a panel
 226  * associated with some user data of type T.
 227  */
 228 template<class T> class NCursesUserPanel : public NCursesPanel
 229 {
 230 public:
 231   NCursesUserPanel (int nlines,
 232                     int ncols,
 233                     int begin_y = 0,
 234                     int begin_x = 0,
 235                     const T* p_UserData = STATIC_CAST(T*)(0))
 236     : NCursesPanel (nlines, ncols, begin_y, begin_x)
 237   {
 238       if (p)
 239         set_user (const_cast<void *>(reinterpret_cast<const void*>
 240                                      (p_UserData)));
 241   };
 242   // This creates an user panel of the requested size with associated
 243   // user data pointed to by p_UserData.
 244
 245   NCursesUserPanel(const T* p_UserData = STATIC_CAST(T*)(0)) : NCursesPanel()
 246   {
 247     if (p)
 248       set_user(const_cast<void *>(reinterpret_cast<const void*>(p_UserData)));
 249   };
 250   // This creates an user panel associated with the ::stdscr and user data
 251   // pointed to by p_UserData.
 252
 253   virtual ~NCursesUserPanel() {};
 254
 255   T* UserData (void)
 256   {
 257     return reinterpret_cast<T*>(get_user ());
 258   };
 259   // Retrieve the user data associated with the panel.
 260
 261   virtual void setUserData (const T* p_UserData)
 262   {
 263     if (p)
 264       set_user (const_cast<void *>(reinterpret_cast<const void*>(p_UserData)));
 265   }
 266   // Associate the user panel with the user data pointed to by p_UserData.
 267 };
 268
 269 #endif /* NCURSES_CURSESP_H_incl */