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 #include "help_mp.h"
  22
  23 #include <stdlib.h>
  24 #include <stdio.h>
  25 #include <string.h>
  26
  27 #include "libmpcodecs/img_format.h"
  28 #include "libmpcodecs/mp_image.h"
  29
  30 #include "m_struct.h"
  31 #include "m_option.h"
  32 #include "menu.h"
  33
  34 #include "libvo/font_load.h"
  35 #include "osdep/keycodes.h"
  36
  37 struct menu_priv_s {
  38   char** lines;
  39   int num_lines;
  40   int cur_line;
  41   int disp_lines;
  42   int minb;
  43   int hspace;
  44   char* file;
  45 };
  46
  47 static struct menu_priv_s cfg_dflt = {
  48   NULL,
  49   0,
  50   0,
  51   0,
  52   0,
  53   3,
  54   NULL
  55 };
  56
  57 #define ST_OFF(m) M_ST_OFF(struct menu_priv_s,m)
  58
  59 static m_option_t cfg_fields[] = {
  60   { "minbor", ST_OFF(minb), CONF_TYPE_INT, M_OPT_MIN, 0, 0, NULL },
  61   { "hspace", ST_OFF(hspace), CONF_TYPE_INT, M_OPT_MIN, 0, 0, NULL },
  62   { "file", ST_OFF(file), CONF_TYPE_STRING, 0, 0, 0, NULL },
  63   { NULL, NULL, NULL, 0,0,0,NULL }
  64 };
  65
  66 #define mpriv (menu->priv)
  67
  68 static void read_cmd(menu_t* menu,int cmd) {
  69   switch(cmd) {
  70   case MENU_CMD_UP:
  71     mpriv->cur_line -= mpriv->disp_lines / 2;
  72     if(mpriv->cur_line < 0)
  73       mpriv->cur_line = 0;
  74     break;
  75   case MENU_CMD_DOWN:
  76   case MENU_CMD_OK:
  77     mpriv->cur_line += mpriv->disp_lines / 2;
  78     if(mpriv->cur_line >= mpriv->num_lines)
  79       mpriv->cur_line = mpriv->num_lines - 1;
  80     break;
  81   case MENU_CMD_LEFT:
  82   case MENU_CMD_CANCEL:
  83     menu->show = 0;
  84     menu->cl = 1;
  85     break;
  86   case MENU_CMD_HOME:
  87     mpriv->cur_line = 0;
  88     break;
  89   case MENU_CMD_END:
  90     mpriv->cur_line = mpriv->num_lines - 1;
  91     break;
  92   case MENU_CMD_PAGE_UP:
  93     mpriv->cur_line =  mpriv->cur_line > mpriv->disp_lines ?
  94       mpriv->cur_line - mpriv->disp_lines : 0;
  95     break;
  96   case MENU_CMD_PAGE_DOWN:
  97     mpriv->cur_line = mpriv->cur_line + mpriv->disp_lines > mpriv->num_lines - 1 ? mpriv->num_lines - 1 : mpriv->cur_line + mpriv->disp_lines;
  98     break;
  99   }
 100 }
 101
 102
 103 static void draw(menu_t* menu,mp_image_t* mpi) {
 104   int x = mpriv->minb;
 105   int y = mpriv->minb;
 106   //int th = 2*mpriv->hspace + vo_font->height;
 107   int i,end;
 108
 109   if(x < 0) x = 8;
 110   if(y < 0) y = 8;
 111
 112   mpriv->disp_lines = (mpi->h + mpriv->hspace  - 2*mpriv->minb) / (  vo_font->height + mpriv->hspace);
 113   if(mpriv->num_lines - mpriv->cur_line < mpriv->disp_lines) {
 114     i = mpriv->num_lines - 1 - mpriv->disp_lines;
 115     if(i < 0) i = 0;
 116     end = mpriv->num_lines - 1;
 117   } else {
 118     i = mpriv->cur_line;
 119     end = i + mpriv->disp_lines;
 120     if(end >= mpriv->num_lines) end = mpriv->num_lines - 1;
 121   }
 122
 123   for( ; i < end ; i++) {
 124     menu_draw_text(mpi,mpriv->lines[i],x,y);
 125     y += vo_font->height + mpriv->hspace;
 126   }
 127
 128 }
 129
 130 #define BUF_SIZE 1024
 131
 132 static int open_txt(menu_t* menu, char* args) {
 133   FILE* fd;
 134   char buf[BUF_SIZE];
 135   char *l;
 136   int s;
 137   int pos = 0, r = 0;
 138   args = NULL; // Warning kill
 139
 140   menu->draw = draw;
 141   menu->read_cmd = read_cmd;
 142
 143   if(!mpriv->file) {
 144     mp_tmsg(MSGT_GLOBAL,MSGL_WARN,"[MENU] Text menu needs a textfile name (parameter file).\n");
 145     return 0;
 146   }
 147
 148   fd = fopen(mpriv->file,"r");
 149   if(!fd) {
 150     mp_tmsg(MSGT_GLOBAL,MSGL_WARN,"[MENU] Can't open %s.\n",mpriv->file);
 151     return 0;
 152   }
 153
 154   while(1) {
 155     r = fread(buf+pos,1,BUF_SIZE-pos-1,fd);
 156     if(r <= 0) {
 157       if(pos > 0) {
 158         mpriv->lines = realloc(mpriv->lines,(mpriv->num_lines + 1)*sizeof(char*));
 159         mpriv->lines[mpriv->num_lines] = strdup(buf);
 160         mpriv->num_lines++;
 161       }
 162       fclose(fd);
 163       break;
 164     }
 165     pos += r;
 166     buf[pos] = '\0';
 167
 168     while((l = strchr(buf,'\n')) != NULL) {
 169       s = l-buf;
 170       mpriv->lines = realloc(mpriv->lines,(mpriv->num_lines + 1)*sizeof(char*));
 171       mpriv->lines[mpriv->num_lines] = malloc(s+1);
 172       memcpy(mpriv->lines[mpriv->num_lines],buf,s);
 173       mpriv->lines[mpriv->num_lines][s] = '\0';
 174       pos -= s + 1;
 175       if(pos > 0)
 176         memmove(buf,l+1,pos);
 177       buf[pos] = '\0';
 178       mpriv->num_lines++;
 179     }
 180     if(pos >= BUF_SIZE-1) {
 181       mp_tmsg(MSGT_GLOBAL,MSGL_WARN,"[MENU] Warning, line too long. Splitting it.\n");
 182       mpriv->lines = realloc(mpriv->lines,(mpriv->num_lines + 1)*sizeof(char*));
 183       mpriv->lines[mpriv->num_lines] = strdup(buf);
 184       mpriv->num_lines++;
 185       pos = 0;
 186     }
 187   }
 188
 189   mp_tmsg(MSGT_GLOBAL,MSGL_INFO,"[MENU] Parsed %d lines.\n",mpriv->num_lines);
 190
 191   return 1;
 192 }
 193
 194 const menu_info_t menu_info_txt = {
 195   "Text file viewer",
 196   "txt",
 197   "Albeu",
 198   "",
 199   {
 200     "txt_cfg",
 201     sizeof(struct menu_priv_s),
 202     &cfg_dflt,
 203     cfg_fields
 204   },
 205   open_txt,
 206 };