release/src/router/libncurses/ncurses/base/lib_slk.c

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  28
  29 /****************************************************************************
  30  *  Authors:                                                                *
  31  *          Gerhard Fuernkranz                      1993 (original)         *
  32  *          Zeyd M. Ben-Halim                       1992,1995 (sic)         *
  33  *          Eric S. Raymond                                                 *
  34  *          Juergen Pfeifer                         1996-on                 *
  35  *          Thomas E. Dickey                                                *
  36  ****************************************************************************/
  37
  38 /*
  39  *      lib_slk.c
  40  *      Soft key routines.
  41  */
  42
  43 #include <curses.priv.h>
  44 #include <ctype.h>
  45
  46 #ifndef CUR
  47 #define CUR SP_TERMTYPE
  48 #endif
  49
  50 MODULE_ID("$Id: lib_slk.c,v 1.48 2011/03/05 21:21:52 tom Exp $")
  51
  52 #ifdef USE_TERM_DRIVER
  53 #define NumLabels    InfoOf(SP_PARM).numlabels
  54 #define NoColorVideo InfoOf(SP_PARM).nocolorvideo
  55 #define LabelWidth   InfoOf(SP_PARM).labelwidth
  56 #define LabelHeight  InfoOf(SP_PARM).labelheight
  57 #else
  58 #define NumLabels    num_labels
  59 #define NoColorVideo no_color_video
  60 #define LabelWidth   label_width
  61 #define LabelHeight  label_height
  62 #endif
  63
  64 /*
  65  * Free any memory related to soft labels, return an error.
  66  */
  67 static int
  68 slk_failed(NCURSES_SP_DCL0)
  69 {
  70     if ((0 != SP_PARM) && SP_PARM->_slk) {
  71         FreeIfNeeded(SP_PARM->_slk->ent);
  72         free(SP_PARM->_slk);
  73         SP_PARM->_slk = (SLK *) 0;
  74     }
  75     return ERR;
  76 }
  77
  78 NCURSES_EXPORT(int)
  79 _nc_format_slks(NCURSES_SP_DCLx int cols)
  80 {
  81     int gap, i, x;
  82     int max_length;
  83
  84     if (!SP_PARM || !SP_PARM->_slk)
  85         return ERR;
  86
  87     max_length = SP_PARM->_slk->maxlen;
  88     if (SP_PARM->slk_format >= 3) {     /* PC style */
  89         gap = (cols - 3 * (3 + 4 * max_length)) / 2;
  90
  91         if (gap < 1)
  92             gap = 1;
  93
  94         for (i = x = 0; i < SP_PARM->_slk->maxlab; i++) {
  95             SP_PARM->_slk->ent[i].ent_x = x;
  96             x += max_length;
  97             x += (i == 3 || i == 7) ? gap : 1;
  98         }
  99     } else {
 100         if (SP_PARM->slk_format == 2) {         /* 4-4 */
 101             gap = cols - (int) (SP_PARM->_slk->maxlab * max_length) - 6;
 102
 103             if (gap < 1)
 104                 gap = 1;
 105             for (i = x = 0; i < SP_PARM->_slk->maxlab; i++) {
 106                 SP_PARM->_slk->ent[i].ent_x = x;
 107                 x += max_length;
 108                 x += (i == 3) ? gap : 1;
 109             }
 110         } else {
 111             if (SP_PARM->slk_format == 1) {     /* 1 -> 3-2-3 */
 112                 gap = (cols - (SP_PARM->_slk->maxlab * max_length) - 5)
 113                     / 2;
 114
 115                 if (gap < 1)
 116                     gap = 1;
 117                 for (i = x = 0; i < SP_PARM->_slk->maxlab; i++) {
 118                     SP_PARM->_slk->ent[i].ent_x = x;
 119                     x += max_length;
 120                     x += (i == 2 || i == 4) ? gap : 1;
 121                 }
 122             } else {
 123                 return slk_failed(NCURSES_SP_ARG);
 124             }
 125         }
 126     }
 127     SP_PARM->_slk->dirty = TRUE;
 128
 129     return OK;
 130 }
 131
 132 /*
 133  * Initialize soft labels.
 134  * Called from newterm()
 135  */
 136 NCURSES_EXPORT(int)
 137 _nc_slk_initialize(WINDOW *stwin, int cols)
 138 {
 139     int i;
 140     int res = OK;
 141     size_t max_length;
 142     SCREEN *sp;
 143     int numlab;
 144
 145     T((T_CALLED("_nc_slk_initialize()")));
 146
 147     assert(stwin);
 148
 149     sp = _nc_screen_of(stwin);
 150     if (0 == sp)
 151         returnCode(ERR);
 152
 153     assert(TerminalOf(SP_PARM));
 154
 155     numlab = NumLabels;
 156
 157     if (SP_PARM->_slk) {        /* we did this already, so simply return */
 158         returnCode(OK);
 159     } else if ((SP_PARM->_slk = typeCalloc(SLK, 1)) == 0)
 160         returnCode(ERR);
 161
 162     if (!SP_PARM->slk_format)
 163         SP_PARM->slk_format = _nc_globals.slk_format;
 164
 165     /*
 166      * If we use colors, vidputs() will suppress video attributes that conflict
 167      * with colors.  In that case, we're still guaranteed that "reverse" would
 168      * work.
 169      */
 170     if ((NoColorVideo & 1) == 0)
 171         SetAttr(SP_PARM->_slk->attr, A_STANDOUT);
 172     else
 173         SetAttr(SP_PARM->_slk->attr, A_REVERSE);
 174
 175     SP_PARM->_slk->maxlab = (short) ((numlab > 0)
 176                                      ? numlab
 177                                      : MAX_SKEY(SP_PARM->slk_format));
 178     SP_PARM->_slk->maxlen = (short) ((numlab > 0)
 179                                      ? LabelWidth * LabelHeight
 180                                      : MAX_SKEY_LEN(SP_PARM->slk_format));
 181     SP_PARM->_slk->labcnt = (short) ((SP_PARM->_slk->maxlab < MAX_SKEY(SP_PARM->slk_format))
 182                                      ? MAX_SKEY(SP_PARM->slk_format)
 183                                      : SP_PARM->_slk->maxlab);
 184
 185     if (SP_PARM->_slk->maxlen <= 0
 186         || SP_PARM->_slk->labcnt <= 0
 187         || (SP_PARM->_slk->ent = typeCalloc(slk_ent,
 188                                             (size_t) SP_PARM->_slk->labcnt))
 189         == NULL)
 190         returnCode(slk_failed(NCURSES_SP_ARG));
 191
 192     max_length = (size_t) SP_PARM->_slk->maxlen;
 193     for (i = 0; i < SP_PARM->_slk->labcnt; i++) {
 194         size_t used = max_length + 1;
 195
 196         SP_PARM->_slk->ent[i].ent_text = (char *) _nc_doalloc(0, used);
 197         if (SP_PARM->_slk->ent[i].ent_text == 0)
 198             returnCode(slk_failed(NCURSES_SP_ARG));
 199         memset(SP_PARM->_slk->ent[i].ent_text, 0, used);
 200
 201         SP_PARM->_slk->ent[i].form_text = (char *) _nc_doalloc(0, used);
 202         if (SP_PARM->_slk->ent[i].form_text == 0)
 203             returnCode(slk_failed(NCURSES_SP_ARG));
 204
 205         if (used > 1) {
 206             memset(SP_PARM->_slk->ent[i].form_text, ' ', used - 1);
 207         }
 208         SP_PARM->_slk->ent[i].form_text[used - 1] = '\0';
 209
 210         SP_PARM->_slk->ent[i].visible = (char) (i < SP_PARM->_slk->maxlab);
 211     }
 212
 213     res = _nc_format_slks(NCURSES_SP_ARGx cols);
 214
 215     if ((SP_PARM->_slk->win = stwin) == NULL) {
 216         returnCode(slk_failed(NCURSES_SP_ARG));
 217     }
 218
 219     /* We now reset the format so that the next newterm has again
 220      * per default no SLK keys and may call slk_init again to
 221      * define a new layout. (juergen 03-Mar-1999)
 222      */
 223     _nc_globals.slk_format = 0;
 224     returnCode(res);
 225 }
 226
 227 /*
 228  * Restore the soft labels on the screen.
 229  */
 230 NCURSES_EXPORT(int)
 231 NCURSES_SP_NAME(slk_restore) (NCURSES_SP_DCL0)
 232 {
 233     T((T_CALLED("slk_restore(%p)"), (void *) SP_PARM));
 234
 235     if (0 == SP_PARM)
 236         returnCode(ERR);
 237     if (SP_PARM->_slk == NULL)
 238         returnCode(ERR);
 239     SP_PARM->_slk->hidden = FALSE;
 240     SP_PARM->_slk->dirty = TRUE;
 241
 242     returnCode(NCURSES_SP_NAME(slk_refresh) (NCURSES_SP_ARG));
 243 }
 244
 245 #if NCURSES_SP_FUNCS
 246 NCURSES_EXPORT(int)
 247 slk_restore(void)
 248 {
 249     return NCURSES_SP_NAME(slk_restore) (CURRENT_SCREEN);
 250 }
 251 #endif