libmenu/menu_list.c

   1 /*
   2  * This file is part of MPlayer.
   3  *
   4  * MPlayer is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * MPlayer is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  16  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <ctype.h>
  22 #include <string.h>
  23
  24 #include "config.h"
  25
  26 #include "libmpcodecs/img_format.h"
  27 #include "libmpcodecs/mp_image.h"
  28
  29 #include "m_struct.h"
  30 #include "menu.h"
  31
  32 #include "sub/font_load.h"
  33 #include "input/keycodes.h"
  34
  35 #define IMPL 1
  36 #include "menu_list.h"
  37
  38 static int mouse_x;
  39 static int mouse_y;
  40 static int selection_x;
  41 static int selection_y;
  42 static int selection_w;
  43 static int selection_h;
  44
  45 #define mpriv (menu->priv)
  46
  47 void menu_list_draw(menu_t* menu,mp_image_t* mpi) {
  48   int x = mpriv->x;
  49   int y = mpriv->y;
  50   int i;
  51   int h = mpriv->h;
  52   int w = mpriv->w;
  53   int dh = 0,dw =  0;
  54   int bx, dx, dy = 0;
  55   int need_h = 0,need_w = 0,ptr_l,sidx = 0;
  56   int th,count = 0;
  57   int bg_w;
  58   int line_h;
  59   list_entry_t* m;
  60
  61   if(mpriv->count < 1)
  62     return;
  63
  64   if(h <= 0) h = mpi->height;
  65   if(w <= 0) w = mpi->width;
  66   dh = h - 2*mpriv->minb;
  67   dw = w - 2*mpriv->minb;
  68   ptr_l = mpriv->ptr ? menu_text_length(mpriv->ptr) : 0;
  69   // mpi is too small
  70   if(h - vo_font->height <= 0 || w - ptr_l <= 0 || dw <= 0 || dh <= 0)
  71     return;
  72
  73   line_h = mpriv->vspace + vo_font->height;
  74   th = menu_text_num_lines(mpriv->title,dw) * line_h + mpriv->vspace;
  75
  76   // the selected item is hidden, find a visible one
  77   if(mpriv->current->hide) {
  78     // try the next
  79     for(m = mpriv->current->next ; m ; m = m->next)
  80       if(!m->hide) break;
  81     if(!m) // or the previous
  82       for(m = mpriv->current->prev ; m ; m = m->prev)
  83         if(!m->hide) break;
  84     if(m) mpriv->current = m;
  85     else ptr_l = 0;
  86   }
  87
  88   for(i = 0, m = mpriv->menu ; m ; m = m->next, i++) {
  89     int ll;
  90     if(m->hide) continue;
  91     ll = menu_text_length(m->txt);
  92     if(ptr_l + ll > need_w) need_w = ptr_l + ll;
  93     if(m == mpriv->current) sidx = i;
  94     count++;
  95   }
  96   if(need_w > dw) need_w = dw;
  97   if(x >= 0)
  98     x += mpriv->minb;
  99   if(y > 0)
 100     y += mpriv->minb;
 101   else
 102     y = mpriv->minb;
 103
 104   need_h = count * line_h - mpriv->vspace;
 105   if( need_h + th > dh) {
 106     int start,end;
 107     mpriv->disp_lines = (dh + mpriv->vspace - th) / line_h;
 108     if(mpriv->disp_lines < 4) {
 109       th = 0;
 110       mpriv->disp_lines = (dh + mpriv->vspace) / line_h;
 111     }
 112     // Too smoll
 113     if(mpriv->disp_lines < 1) return;
 114     need_h = mpriv->disp_lines * line_h - mpriv->vspace;
 115
 116     start = sidx - (mpriv->disp_lines/2);
 117     if(start < 0) start = 0;
 118     end = start + mpriv->disp_lines;
 119     if(end > count) {
 120       end = count;
 121       if(end - start < mpriv->disp_lines)
 122         start = end - mpriv->disp_lines < 0 ? 0 : end - mpriv->disp_lines;
 123     }
 124     m = mpriv->menu;
 125     for(i = 0 ; m->next && i < start ; ) {
 126       if(!m->hide) i++;
 127       m = m->next;
 128     }
 129   } else {
 130     m = mpriv->menu;
 131     mpriv->disp_lines = count;
 132   }
 133
 134   bg_w = need_w+2*mpriv->minb;
 135   if(th > 0) {
 136     int tw,th2;
 137     menu_text_size(mpriv->title,dw,mpriv->vspace,1,&tw,&th2);
 138     if(mpriv->title_bg >= 0) {
 139       if(tw+2*mpriv->minb > bg_w) bg_w = tw+2*mpriv->minb;
 140       menu_draw_box(mpi,mpriv->title_bg,mpriv->title_bg_alpha,
 141                     x < 0 ? (mpi->w-bg_w)/2 : x-mpriv->minb,dy+y-mpriv->vspace/2,bg_w,th);
 142     }
 143     menu_draw_text_full(mpi,mpriv->title,
 144                         x < 0 ? mpi->w / 2 : x,
 145                         dy+y, x < 0 ? dw : (tw > need_w ? tw : need_w), 0,
 146                         mpriv->vspace,1,
 147                         MENU_TEXT_TOP|MENU_TEXT_HCENTER,
 148                         MENU_TEXT_TOP|(x < 0 ? MENU_TEXT_HCENTER :MENU_TEXT_LEFT));
 149     dy += th;
 150   }
 151
 152   dx = x < 0 ? (mpi->w - need_w) / 2 : x;
 153   bx = x < 0 ? (mpi->w - bg_w) / 2 : x - mpriv->minb;
 154
 155   // If mouse moved, try to update selected menu item by the mouse position.
 156   if (menu_mouse_pos_updated) {
 157     mouse_x = menu_mouse_x * mpi->width;
 158     mouse_y = menu_mouse_y * mpi->height;
 159     if (mouse_x >= bx && mouse_x < bx + bg_w) {
 160       int by = dy + y - mpriv->vspace / 2;
 161       int max_by = dh + y + mpriv->vspace / 2;
 162       if (mouse_y >= by && mouse_y < max_by) {
 163         int cur_no = (mouse_y - by) / line_h;
 164         list_entry_t* e = m;
 165         for (i = 0; e != NULL; e = e->next) {
 166           if (e->hide) continue;
 167           if (i == cur_no) {
 168             mpriv->current = e;
 169             break;
 170           }
 171           ++i;
 172         }
 173       }
 174     }
 175     menu_mouse_pos_updated = 0;
 176   }
 177
 178   for( ; m != NULL && dy + vo_font->height < dh ; m = m->next ) {
 179     if(m->hide) continue;
 180     if(m == mpriv->current) {
 181       // Record rectangle of current selection box.
 182       selection_x = bx;
 183       selection_y = dy + y - mpriv->vspace / 2;
 184       selection_w = bg_w;
 185       selection_h = line_h;
 186
 187       if(mpriv->ptr_bg >= 0)
 188         menu_draw_box(mpi,mpriv->ptr_bg,mpriv->ptr_bg_alpha,
 189                       bx, dy + y - mpriv->vspace / 2,
 190                       bg_w, line_h);
 191       if(ptr_l > 0)
 192         menu_draw_text_full(mpi,mpriv->ptr,
 193                             dx,
 194                             dy+y,dw,dh - dy,
 195                             mpriv->vspace,0,
 196                             MENU_TEXT_TOP|MENU_TEXT_LEFT,
 197                             MENU_TEXT_TOP|MENU_TEXT_LEFT);
 198     } else if(mpriv->item_bg >= 0)
 199       menu_draw_box(mpi,mpriv->item_bg,mpriv->item_bg_alpha,
 200                     bx, dy + y - mpriv->vspace / 2,
 201                     bg_w, line_h);
 202     menu_draw_text_full(mpi,m->txt,
 203                         dx + ptr_l,
 204                         dy+y,dw-ptr_l,dh - dy,
 205                         mpriv->vspace,0,
 206                         MENU_TEXT_TOP|MENU_TEXT_LEFT,
 207                         MENU_TEXT_TOP|MENU_TEXT_LEFT);
 208     dy += line_h;
 209   }
 210
 211 }
 212
 213 void menu_list_read_cmd(menu_t* menu,int cmd) {
 214   list_entry_t* m;
 215   int i;
 216   switch(cmd) {
 217   case MENU_CMD_UP:
 218     while(mpriv->current->prev) {
 219       mpriv->current = mpriv->current->prev;
 220       if(!mpriv->current->hide) return;
 221     }
 222     for( ; mpriv->current->next != NULL ; mpriv->current = mpriv->current->next)
 223       /* NOTHING */;
 224     if(!mpriv->current->hide) return;
 225     while(mpriv->current->prev) {
 226       mpriv->current = mpriv->current->prev;
 227       if(!mpriv->current->hide) return;
 228     }
 229     break;
 230   case MENU_CMD_DOWN:
 231     while(mpriv->current->next) {
 232       mpriv->current = mpriv->current->next;
 233       if(!mpriv->current->hide) return;
 234     }
 235     mpriv->current = mpriv->menu;
 236     if(!mpriv->current->hide) return;
 237     while(mpriv->current->next) {
 238       mpriv->current = mpriv->current->next;
 239       if(!mpriv->current->hide) return;
 240     }
 241     break;
 242   case MENU_CMD_HOME:
 243     mpriv->current = mpriv->menu;
 244     break;
 245   case MENU_CMD_END:
 246     for(m = mpriv->current ; m && m->next ; m = m->next)
 247       /**/;
 248     if(m)
 249       mpriv->current = m;
 250     break;
 251   case MENU_CMD_PAGE_UP:
 252     for(i = 0, m = mpriv->current ; m && m->prev && i < mpriv->disp_lines ; m = m->prev, i++)
 253       /**/;
 254     if(m)
 255       mpriv->current = m;
 256     break;
 257   case MENU_CMD_PAGE_DOWN:
 258     for(i = 0, m = mpriv->current ; m && m->next && i < mpriv->disp_lines ; m = m->next, i++)
 259       /**/;
 260     if(m)
 261       mpriv->current = m;
 262     break;
 263   case MENU_CMD_LEFT:
 264   case MENU_CMD_CANCEL:
 265     menu->show = 0;
 266     menu->cl = 1;
 267     break;
 268   case MENU_CMD_CLICK:
 269     if (mouse_x >= selection_x && mouse_x < selection_x + selection_w &&
 270         mouse_y >= selection_y && mouse_y < selection_y + selection_h)
 271       menu_read_cmd(menu, MENU_CMD_OK);
 272     break;
 273   }
 274 }
 275
 276 int menu_list_jump_to_key(menu_t* menu,int c) {
 277   if(c < 256 && isalnum(c)) {
 278     list_entry_t* e = mpriv->current;
 279     if(e->txt[0] == c) e = e->next;
 280     for(  ; e ; e = e->next) {
 281         if(e->txt[0] == c) {
 282           mpriv->current = e;
 283           return 1;
 284         }
 285     }
 286     for(e = mpriv->menu ; e ;  e = e->next) {
 287         if(e->txt[0] == c) {
 288           mpriv->current = e;
 289           return 1;
 290         }
 291     }
 292     return 1;
 293   }
 294   return 0;
 295 }
 296
 297 void menu_list_add_entry(menu_t* menu,list_entry_t* entry) {
 298   list_entry_t* l;
 299   mpriv->count++;
 300
 301   if(mpriv->menu == NULL) {
 302     mpriv->menu = mpriv->current = entry;
 303     return;
 304   }
 305
 306   for(l = mpriv->menu ; l->next != NULL ; l = l->next)
 307     /* NOP */;
 308   l->next = entry;
 309   entry->prev = l;
 310 }
 311
 312 void menu_list_init(menu_t* menu) {
 313   if(!mpriv)
 314     mpriv = calloc(1,sizeof(struct menu_priv_s));
 315
 316 }
 317
 318 void menu_list_uninit(menu_t* menu,free_entry_t free_func) {
 319   list_entry_t *i,*j;
 320
 321   if(!free_func) free_func = (free_entry_t)free;
 322
 323   for(i = mpriv->menu ; i != NULL ; ) {
 324     j = i->next;
 325     free_func(i);
 326     i = j;
 327   }
 328
 329   mpriv->menu = mpriv->current = NULL;
 330
 331 }