ext2ed/win.c

   1 /*
   2
   3 /usr/src/ext2ed/win.c
   4
   5 A part of the extended file system 2 disk editor.
   6
   7 --------------------------------------------------------
   8 Window management - Interfacing with the ncurses library
   9 --------------------------------------------------------
  10
  11 First written on: April 17 1995
  12
  13 Copyright (C) 1995 Gadi Oxman
  14
  15 */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20
  21 #include "ext2ed.h"
  22
  23 struct struct_pad_info show_pad_info;
  24 WINDOW *title_win,*show_win,*command_win,*show_pad;
  25
  26 void init_windows (void)
  27
  28 {
  29         char title_string [80];
  30
  31         initscr ();
  32
  33         if (LINES<TITLE_WIN_LINES+SHOW_WIN_LINES+COMMAND_WIN_LINES+3) {
  34                 printf ("Sorry, your terminal screen is too small\n");
  35                 printf ("Error - Can not initialize windows\n");
  36                 exit (1);
  37         }
  38
  39         title_win=newwin (TITLE_WIN_LINES,COLS,0,0);
  40         show_win=newwin (SHOW_WIN_LINES,COLS,TITLE_WIN_LINES,0);
  41         show_pad=newpad (SHOW_PAD_LINES,SHOW_PAD_COLS);
  42         command_win=newwin (COMMAND_WIN_LINES,COLS,LINES-COMMAND_WIN_LINES,0);
  43
  44         if (title_win==NULL || show_win==NULL || show_pad==NULL || command_win==NULL) {
  45                 printf ("Error - Not enough memory - Can not initialize windows\n");exit (1);
  46         }
  47
  48         box (title_win,0,0);
  49         sprintf (title_string,"EXT2ED - Extended-2 File System editor ver %d.%d (%s)",version_major,version_minor,revision_date);
  50         wmove (title_win,TITLE_WIN_LINES/2,(COLS-strlen (title_string))/2);
  51         wprintw (title_win,title_string);
  52
  53 #ifdef  OLD_NCURSES
  54         wattrset (show_win,A_NORMAL);werase (show_win);
  55 #else
  56         wbkgdset (show_win,A_REVERSE);werase (show_win);
  57 #endif
  58         show_pad_info.line=0;show_pad_info.col=0;
  59         show_pad_info.display_lines=LINES-TITLE_WIN_LINES-SHOW_WIN_LINES-COMMAND_WIN_LINES-2;
  60         show_pad_info.display_cols=COLS;
  61         show_pad_info.max_line=show_pad_info.display_lines-1;show_pad_info.max_col=show_pad_info.display_cols-1;
  62         show_pad_info.disable_output=0;
  63
  64         scrollok (command_win,TRUE);
  65
  66         refresh_title_win ();refresh_show_win ();refresh_show_pad ();refresh_command_win ();
  67 }
  68
  69 void refresh_title_win (void)
  70
  71 {
  72         wrefresh (title_win);
  73 }
  74
  75 void refresh_show_win (void)
  76
  77 {
  78         int current_page,total_pages;
  79
  80         current_page=show_pad_info.line/show_pad_info.display_lines+1;
  81         if (show_pad_info.line%show_pad_info.display_lines)
  82                 current_page++;
  83         total_pages=show_pad_info.max_line/show_pad_info.display_lines+1;
  84
  85         wmove (show_win,2,COLS-18);
  86         wprintw (show_win,"Page %d of %d\n",current_page,total_pages);
  87
  88         wmove (show_win,2,COLS-18);
  89         wrefresh (show_win);
  90 }
  91
  92
  93 void refresh_show_pad (void)
  94
  95 {
  96         int left,top,right,bottom,i;
  97
  98         if (show_pad_info.disable_output)
  99                 return;
 100
 101         if (show_pad_info.max_line < show_pad_info.display_lines-1) {
 102                 for (i=show_pad_info.max_line+1;i<show_pad_info.display_lines;i++) {
 103                         wmove (show_pad,i,0);wprintw (show_pad,"\n");
 104                 }
 105         }
 106         left=0;right=show_pad_info.display_cols-1;
 107         top=TITLE_WIN_LINES+SHOW_WIN_LINES+1;bottom=top+show_pad_info.display_lines-1;
 108
 109         if (show_pad_info.line > show_pad_info.max_line-show_pad_info.display_lines+1)
 110                 show_pad_info.line=show_pad_info.max_line-show_pad_info.display_lines+1;
 111
 112         if (show_pad_info.line < 0)
 113                 show_pad_info.line=0;
 114
 115 #ifdef OLD_NCURSES
 116         prefresh (show_pad,show_pad_info.line,show_pad_info.col,top,left,show_pad_info.display_lines-1,show_pad_info.display_cols-1);
 117 #else
 118         prefresh (show_pad,show_pad_info.line,show_pad_info.col,top,left,top+show_pad_info.display_lines-1,left+show_pad_info.display_cols-1);
 119 #endif
 120 }
 121
 122 void refresh_command_win (void)
 123
 124 {
 125         wrefresh (command_win);
 126 }
 127
 128 void close_windows (void)
 129
 130 {
 131         echo ();
 132
 133         delwin (title_win);
 134         delwin (command_win);
 135         delwin (show_win);
 136         delwin (show_pad);
 137
 138         endwin ();
 139 }
 140
 141 void show_info (void)
 142
 143 {
 144         int block_num,block_offset;
 145
 146         block_num=device_offset/file_system_info.block_size;
 147         block_offset=device_offset%file_system_info.block_size;
 148
 149         wmove (show_win,0,0);
 150         wprintw (show_win,"Offset %-3ld in block %ld. ",block_offset,block_num);
 151         if (current_type != NULL)
 152                 wprintw (show_win,"Type: %s\n",current_type->name);
 153         else
 154                 wprintw (show_win,"Type: %s\n","none");
 155
 156         refresh_show_win ();
 157 }
 158
 159
 160 void redraw_all (void)
 161
 162 {
 163         close_windows ();
 164         init_windows ();
 165
 166         wmove (command_win,0,0);
 167         mvcur (-1,-1,LINES-COMMAND_WIN_LINES,0);
 168
 169 }