release/src/router/libncurses/c++/cursespad.cc

   1 // * this is for making emacs happy: -*-Mode: C++;-*-
   2 /****************************************************************************
   3  * Copyright (c) 1998-2012,2013 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      *
   8  * without limitation the rights to use, copy, modify, merge, publish,      *
   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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  21  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
  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     *
  26  * sale, use or other dealings in this Software without prior written       *
  27  * authorization.                                                           *
  28  ****************************************************************************/
  29
  30 /****************************************************************************
  31  *   Author: Juergen Pfeifer, 1999                                          *
  32  ****************************************************************************/
  33
  34 #include "internal.h"
  35
  36 #include <cursesw.h>
  37
  38 MODULE_ID("$Id: cursespad.cc,v 1.17 2013/03/30 19:45:36 tom Exp $")
  39
  40 NCursesPad::NCursesPad(int nlines, int ncols)
  41   : NCursesWindow(),
  42     viewWin(static_cast<NCursesWindow*>(0)),
  43     viewSub(static_cast<NCursesWindow*>(0)),
  44     h_gridsize(0), v_gridsize(0),
  45     min_row(0), min_col(0)
  46 {
  47   w = ::newpad(nlines, ncols);
  48   if (static_cast<WINDOW*>(0) == w) {
  49     count--;
  50     err_handler("Cannot construct window");
  51   }
  52   alloced = TRUE;
  53 }
  54
  55
  56 int NCursesPad::driver (int key)
  57 {
  58   // Default implementation
  59   switch(key) {
  60   case KEY_UP:
  61     // =======
  62     return REQ_PAD_UP;
  63   case KEY_DOWN:
  64     // =========
  65     return REQ_PAD_DOWN;
  66   case KEY_LEFT:
  67     // =========
  68     return REQ_PAD_LEFT;
  69   case KEY_RIGHT:
  70     // ==========
  71     return REQ_PAD_RIGHT;
  72   case KEY_EXIT:
  73     // =========
  74   case CTRL('X'):
  75     // ==========
  76     return REQ_PAD_EXIT;
  77
  78   default: return(key);
  79   }
  80 }
  81
  82
  83 void NCursesPad::operator()(void)
  84 {
  85   NCursesWindow* W = Win();
  86
  87   if (static_cast<NCursesWindow*>(0) != W) {
  88     int Width  = W->width();
  89     int Height = W->height();
  90
  91     int req = REQ_PAD_REFRESH;
  92
  93     W->keypad(TRUE);
  94     W->meta(TRUE);
  95     refresh();
  96
  97     do {
  98       bool changed = FALSE;
  99
 100       switch (req) {
 101       case REQ_PAD_REFRESH:
 102         // ================
 103         changed = TRUE;
 104         break;
 105       case REQ_PAD_LEFT:
 106         // =============
 107         if (min_col > 0) {
 108           changed = TRUE;
 109           if (min_col < h_gridsize)
 110             min_col = 0;
 111           else
 112             min_col -= h_gridsize;
 113         }
 114         else
 115           OnNavigationError(req);
 116         break;
 117       case REQ_PAD_RIGHT:
 118         // ==============
 119         if (min_col < (width() - Width - 1)) {
 120           changed = TRUE;
 121           if (min_col > (width() - Width - h_gridsize - 1))
 122             min_col = width() - Width - 1;
 123           else
 124             min_col += h_gridsize;
 125         }
 126         else
 127           OnNavigationError(req);
 128         break;
 129       case REQ_PAD_UP:
 130         // ===========
 131         if (min_row > 0) {
 132           changed = TRUE;
 133           if (min_row < v_gridsize)
 134             min_row = 0;
 135           else
 136             min_row -= v_gridsize;
 137         }
 138         else
 139           OnNavigationError(req);
 140         break;
 141       case REQ_PAD_DOWN:
 142         // =============
 143         if (min_row < (height() - Height - 1)) {
 144           changed = TRUE;
 145           if (min_row > (height() - Height - v_gridsize - 1))
 146             min_row = height() - Height - 1;
 147           else
 148             min_row += v_gridsize;
 149         }
 150         else
 151           OnNavigationError(req);
 152         break;
 153
 154       default:
 155         OnUnknownOperation(req);
 156       }
 157
 158       if (changed) {
 159         noutrefresh();
 160         W->syncup();
 161         OnOperation(req);
 162         viewWin->refresh();
 163       }
 164     } while( (req=driver(W->getch())) != REQ_PAD_EXIT );
 165   }
 166 }
 167
 168
 169 int NCursesPad::refresh()
 170 {
 171   int res = noutrefresh();
 172   if (res==OK && (static_cast<NCursesWindow*>(0) != viewWin)) {
 173     res = (viewWin->refresh());
 174   }
 175   return(res);
 176 }
 177
 178 int NCursesPad::noutrefresh()
 179 {
 180   int res = OK;
 181   NCursesWindow* W = Win();
 182   if (static_cast<NCursesWindow*>(0) != W) {
 183     int high = W->maxy();
 184     int wide = W->maxx();
 185     res = copywin(*W, min_row, min_col,
 186                   0, 0, high, wide,
 187                   FALSE);
 188     if (res==OK) {
 189       W->syncup();
 190       res = viewWin->noutrefresh();
 191     }
 192   }
 193   return (res);
 194 }
 195
 196 void NCursesPad::setWindow(NCursesWindow& view,
 197                            int v_grid NCURSES_PARAM_INIT(1),
 198                            int h_grid NCURSES_PARAM_INIT(1))
 199 {
 200   viewWin = &view;
 201   min_row = min_col = 0;
 202   if (h_grid <=0 || v_grid <= 0)
 203     err_handler("Illegal Gridsize");
 204   else {
 205     h_gridsize = h_grid;
 206     v_gridsize = v_grid;
 207   }
 208 }
 209
 210 void NCursesPad::setSubWindow(NCursesWindow& sub)
 211 {
 212   if (static_cast<NCursesWindow*>(0) == viewWin)
 213     err_handler("Pad has no viewport");
 214   assert(viewWin != 0);
 215   if (!viewWin->isDescendant(sub))
 216     THROW(new NCursesException("NCursesFramePad", E_SYSTEM_ERROR));
 217   viewSub = &sub;
 218 }
 219
 220 void NCursesFramedPad::OnOperation(int pad_req)
 221 {
 222   (void) pad_req;
 223   NCursesWindow* W = Win();
 224   NCursesWindow* W2 = getWindow();
 225
 226   if ((static_cast<NCursesWindow*>(0) != W) && (static_cast<NCursesWindow*>(0) != W2)) {
 227     int Width  = W->width();
 228     int Height = W->height();
 229     int i, row, col, h_len, v_len;
 230
 231     int my_width = width();
 232
 233     if (my_width != 0) {
 234       h_len = (Width*Width + my_width - 1) / my_width;
 235       if (h_len==0)
 236         h_len = 1;
 237       if (h_len > Width)
 238         h_len = Width;
 239     } else {
 240       h_len = 1;
 241     }
 242
 243     int my_height = height();
 244
 245     if (my_height != 0) {
 246       v_len = (Height*Height + my_height - 1) / my_height;
 247       if (v_len==0)
 248         v_len = 1;
 249       if (v_len > Height)
 250         v_len = Height;
 251     } else {
 252       v_len = 1;
 253     }
 254
 255     if (my_width != 0) {
 256       col  = (min_col * Width + my_width - 1) / my_width;
 257       if (col + h_len > Width)
 258         col = Width - h_len;
 259     } else {
 260       col = 0;
 261     }
 262
 263     if (my_height != 0) {
 264       row  = (min_row * Height + my_height - 1) / my_height;
 265       if (row + v_len > Height)
 266         row = Height - v_len;
 267     } else {
 268       row = 0;
 269     }
 270
 271     W2->vline(1,Width+1,Height);
 272     W2->attron(A_REVERSE);
 273     if (v_len>=2) {
 274       W2->addch(row+1,Width+1,ACS_UARROW);
 275       for(i=2;i<v_len;i++)
 276         W2->addch(row+i,Width+1,' ');
 277       W2->addch(row+v_len,Width+1,ACS_DARROW);
 278     }
 279     else {
 280       for(i=1;i<=v_len;i++)
 281         W2->addch(row+i,Width+1,' ');
 282     }
 283     W2->attroff(A_REVERSE);
 284
 285     W2->hline(Height+1,1,Width);
 286     W2->attron(A_REVERSE);
 287     if (h_len >= 2) {
 288       W2->addch(Height+1,col+1,ACS_LARROW);
 289       for(i=2;i<h_len;i++)
 290         W2->addch(Height+1,col+i,' ');
 291       W2->addch(Height+1,col+h_len,ACS_RARROW);
 292     }
 293     else {
 294       for(i=1;i<=h_len;i++)
 295         W2->addch(Height+1,col+i,' ');
 296     }
 297     W2->attroff(A_REVERSE);
 298   }
 299 }