libmenu/menu_txt.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 "config.h"
  20 #include "mp_msg.h"
  21
  22 #include <stdlib.h>
  23 #include <stdio.h>
  24 #include <string.h>
  25
  26 #include "libmpcodecs/img_format.h"
  27 #include "libmpcodecs/mp_image.h"
  28
  29 #include "m_struct.h"
  30 #include "m_option.h"
  31 #include "menu.h"
  32
  33 #include "libvo/font_load.h"
  34 #include "osdep/keycodes.h"
  35
  36 struct menu_priv_s {
  37   char** lines;
  38   int num_lines;
  39   int cur_line;
  40   int disp_lines;
  41   int minb;
  42   int hspace;
  43   char* file;
  44 };
  45
  46 static struct menu_priv_s cfg_dflt = {
  47   NULL,
  48   0,
  49   0,
  50   0,
  51   0,
  52   3,
  53   NULL
  54 };
  55
  56 #define ST_OFF(m) M_ST_OFF(struct menu_priv_s,m)
  57
  58 static m_option_t cfg_fields[] = {
  59   { "minbor", ST_OFF(minb), CONF_TYPE_INT, M_OPT_MIN, 0, 0, NULL },
  60   { "hspace", ST_OFF(hspace), CONF_TYPE_INT, M_OPT_MIN, 0, 0, NULL },
  61   { "file", ST_OFF(file), CONF_TYPE_STRING, 0, 0, 0, NULL },
  62   { NULL, NULL, NULL, 0,0,0,NULL }
  63 };
  64
  65 #define mpriv (menu->priv)
  66
  67 static void read_cmd(menu_t* menu,int cmd) {
  68   switch(cmd) {
  69   case MENU_CMD_UP:
  70     mpriv->cur_line -= mpriv->disp_lines / 2;
  71     if(mpriv->cur_line < 0)
  72       mpriv->cur_line = 0;
  73     break;
  74   case MENU_CMD_DOWN:
  75   case MENU_CMD_OK:
  76     mpriv->cur_line += mpriv->disp_lines / 2;
  77     if(mpriv->cur_line >= mpriv->num_lines)
  78       mpriv->cur_line = mpriv->num_lines - 1;
  79     break;
  80   case MENU_CMD_LEFT:
  81   case MENU_CMD_CANCEL:
  82     menu->show = 0;
  83     menu->cl = 1;
  84     break;
  85   case MENU_CMD_HOME:
  86     mpriv->cur_line = 0;
  87     break;
  88   case MENU_CMD_END:
  89     mpriv->cur_line = mpriv->num_lines - 1;
  90     break;
  91   case MENU_CMD_PAGE_UP:
  92     mpriv->cur_line =  mpriv->cur_line > mpriv->disp_lines ?
  93       mpriv->cur_line - mpriv->disp_lines : 0;
  94     break;
  95   case MENU_CMD_PAGE_DOWN:
  96     mpriv->cur_line = mpriv->cur_line + mpriv->disp_lines > mpriv->num_lines - 1 ? mpriv->num_lines - 1 : mpriv->cur_line + mpriv->disp_lines;
  97     break;
  98   }
  99 }
 100
 101
 102 static void draw(menu_t* menu,mp_image_t* mpi) {
 103   int x = mpriv->minb;
 104   int y = mpriv->minb;
 105   //int th = 2*mpriv->hspace + vo_font->height;
 106   int i,end;
 107
 108   if(x < 0) x = 8;
 109   if(y < 0) y = 8;
 110
 111   mpriv->disp_lines = (mpi->h + mpriv->hspace  - 2*mpriv->minb) / (  vo_font->height + mpriv->hspace);
 112   if(mpriv->num_lines - mpriv->cur_line < mpriv->disp_lines) {
 113     i = mpriv->num_lines - 1 - mpriv->disp_lines;
 114     if(i < 0) i = 0;
 115     end = mpriv->num_lines - 1;
 116   } else {
 117     i = mpriv->cur_line;
 118     end = i + mpriv->disp_lines;
 119     if(end >= mpriv->num_lines) end = mpriv->num_lines - 1;
 120   }
 121
 122   for( ; i < end ; i++) {
 123     menu_draw_text(mpi,mpriv->lines[i],x,y);
 124     y += vo_font->height + mpriv->hspace;
 125   }
 126
 127 }
 128
 129 #define BUF_SIZE 1024
 130
 131 static int open_txt(menu_t* menu, char* args) {
 132   FILE* fd;
 133   char buf[BUF_SIZE];
 134   char *l;
 135   int s;
 136   int pos = 0, r = 0;
 137   args = NULL; // Warning kill
 138
 139   menu->draw = draw;
 140   menu->read_cmd = read_cmd;
 141
 142   if(!mpriv->file) {
 143     mp_tmsg(MSGT_GLOBAL,MSGL_WARN,"[MENU] Text menu needs a textfile name (parameter file).\n");
 144     return 0;
 145   }
 146
 147   fd = fopen(mpriv->file,"r");
 148   if(!fd) {
 149     mp_tmsg(MSGT_GLOBAL,MSGL_WARN,"[MENU] Can't open %s.\n",mpriv->file);
 150     return 0;
 151   }
 152
 153   while(1) {
 154     r = fread(buf+pos,1,BUF_SIZE-pos-1,fd);
 155     if(r <= 0) {
 156       if(pos > 0) {
 157         mpriv->lines = realloc(mpriv->lines,(mpriv->num_lines + 1)*sizeof(char*));
 158         mpriv->lines[mpriv->num_lines] = strdup(buf);
 159         mpriv->num_lines++;
 160       }
 161       fclose(fd);
 162       break;
 163     }
 164     pos += r;
 165     buf[pos] = '\0';
 166
 167     while((l = strchr(buf,'\n')) != NULL) {
 168       s = l-buf;
 169       mpriv->lines = realloc(mpriv->lines,(mpriv->num_lines + 1)*sizeof(char*));
 170       mpriv->lines[mpriv->num_lines] = malloc(s+1);
 171       memcpy(mpriv->lines[mpriv->num_lines],buf,s);
 172       mpriv->lines[mpriv->num_lines][s] = '\0';
 173       pos -= s + 1;
 174       if(pos > 0)
 175         memmove(buf,l+1,pos);
 176       buf[pos] = '\0';
 177       mpriv->num_lines++;
 178     }
 179     if(pos >= BUF_SIZE-1) {
 180       mp_tmsg(MSGT_GLOBAL,MSGL_WARN,"[MENU] Warning, line too long. Splitting it.\n");
 181       mpriv->lines = realloc(mpriv->lines,(mpriv->num_lines + 1)*sizeof(char*));
 182       mpriv->lines[mpriv->num_lines] = strdup(buf);
 183       mpriv->num_lines++;
 184       pos = 0;
 185     }
 186   }
 187
 188   mp_tmsg(MSGT_GLOBAL,MSGL_INFO,"[MENU] Parsed %d lines.\n",mpriv->num_lines);
 189
 190   return 1;
 191 }
 192
 193 const menu_info_t menu_info_txt = {
 194   "Text file viewer",
 195   "txt",
 196   "Albeu",
 197   "",
 198   {
 199     "txt_cfg",
 200     sizeof(struct menu_priv_s),
 201     &cfg_dflt,
 202     cfg_fields
 203   },
 204   open_txt,
 205 };