window.c

C语言高级编程及实例部析 代码 例子 详细说明 等。很不错

               }
               setup_window( win );
               show_window_header( win );
               win->ruler = mode.ruler;
               make_ruler( win );
               show_ruler( win );
               show_ruler_pointer( win );
               display_current_window( win );
               save_screen_line( 0, win->bottom_line, line_buff );

               
               set_prompt( win4, win->bottom_line );
            }
         }
         new_top_line = win->top_line;
         new_bottom_line = above->bottom_line;
         for (above=g_status.window_list; above != NULL; above=above->next) {
            if (!above->visible) {
               if (above->bottom_line == old_bottom_line) {
                  above->bottom_line = new_bottom_line;
                  if (above->cline < new_bottom_line)
                     above->cline = new_bottom_line;
                  setup_window( above );
               } else if (above->top_line == old_top_line) {
                  above->top_line = new_top_line;
                  if (above->cline < new_top_line)
                     above->cline = new_top_line;
                  if ((long)(above->cline+1L - (above->top_line+above->ruler)) >
                                                                above->rline)
                     above->cline = (int)above->rline + above->top_line +
                                     above->ruler - 1;
                  setup_window( above );
               }
            }
         }
      }
      restore_screen_line( 0, win->bottom_line, line_buff );
   } else {
     if (win->vertical)
       
        error( WARNING, win->bottom_line, win5 );
     else
        
        error( WARNING, win->bottom_line, win6 );
   }
   return( OK );
}



int  zoom_window( WINDOW *window )
{
register WINDOW *wp;

   if (window != NULL) {
      entab_linebuff( );
      un_copy_line( window->ll, window, TRUE );
      for (wp=g_status.window_list; wp != NULL; wp=wp->next) {
         if (wp != window && wp->visible)
            wp->visible = FALSE;

        
         diff.defined = FALSE;
         if (wp->top_line != 1)
            wp->cline = wp->cline - (wp->top_line+wp->ruler) + 1;
         wp->top_line = 1;
         wp->bottom_line = g_display.nlines;
         wp->end_col   = g_display.ncols - 1;
         wp->start_col = 0;
         wp->vertical  = FALSE;
         check_virtual_col( wp, wp->rcol, wp->ccol );
         make_ruler( wp );
      }
      redraw_screen( window );
      show_ruler( window );
   }
   return( OK );
}



int  next_hidden_window( WINDOW *window )
{
int  poof = FALSE;
register WINDOW *wp;

   if (window != NULL) {

     
      wp = window;
      for (wp=window->next; wp != NULL && !poof; ) {
         if (!wp->visible)
            poof = TRUE;
         else
            wp = wp->next;
      }

     
      if (!poof) {
         for (wp=g_status.window_list; wp != NULL && !poof; ) {
            if (!wp->visible)
               poof = TRUE;
            else
               wp = wp->next;
         }
      }

      if (poof) {
         entab_linebuff( );
         un_copy_line( window->ll, window, TRUE );
         wp->cline = window->top_line + window->ruler +
                       (wp->cline - (wp->top_line + wp->ruler));
         wp->top_line = window->top_line;
         wp->bottom_line = window->bottom_line;
         wp->start_col = window->start_col;
         wp->end_col   = window->end_col;
         wp->vertical  = window->vertical;
         if (wp->cline < wp->top_line + wp->ruler)
            wp->cline = wp->top_line + wp->ruler;
         if (wp->cline > wp->bottom_line)
            wp->cline = wp->bottom_line;
         if ((wp->cline+1L - (wp->top_line+wp->ruler)) > wp->rline)
            wp->cline = (int)wp->rline + wp->top_line + wp->ruler - 1;
         check_virtual_col( wp, wp->rcol, wp->ccol );
         wp->visible = TRUE;
         window->visible = FALSE;
         if (diff.defined  &&  (diff.w1 == window  ||  diff.w2 == window))
            diff.defined = FALSE;
         g_status.current_window = wp;
         redraw_current_window( wp );
         make_ruler( wp );
         show_ruler( wp );
      }
   }
   return( OK );
}



void setup_window( WINDOW *window )
{
   window->page = window->bottom_line - (window->top_line + window->ruler) -
                  g_status.overlap + 1;
   if (window->page < 1)
      window->page = 1;
}



void finish( WINDOW *window )
{
register WINDOW *wp;   
register WINDOW *win;  
file_infos *file, *fp;  
int  poof;
int  cline;
int  top;
int  bottom;
int  start_col;
int  end_col;
int  max_letter;
int  file_change = FALSE;
line_list_ptr ll;
line_list_ptr temp_ll;

   win = window;
   entab_linebuff( );
   if (un_copy_line( win->ll, win, TRUE ) == ERROR)
      return;

   file = win->file_info;
   
   file = win->file_info;
   for (wp=g_status.window_list; wp != NULL; wp=wp->next) {
      if (wp->file_info == file) {
         if (!wp->visible) {
            if (wp->prev == NULL) {
               if (wp->next == NULL)
                  g_status.stop = TRUE;
               else
                  g_status.window_list = wp->next;
            } else
               wp->prev->next = wp->next;
            if (wp->next)
               wp->next->prev = wp->prev;
            --wp->file_info->ref_count;
            free( wp );
            --g_status.window_count;
         }
      }
   }

   if (win->prev == NULL && win->next == NULL)
      g_status.stop = TRUE;

   poof = FALSE;

   if (g_status.stop != TRUE) {
     
      top       = win->top_line;
      bottom    = win->bottom_line;
      start_col = win->start_col;
      end_col   = win->end_col;
      wp = g_status.window_list;
      if (wp != NULL) {
         while (wp->next != NULL)
            wp = wp->next;
      }
      while (wp != NULL && poof == FALSE) {
         if (wp->top_line == top         &&  wp->bottom_line == bottom  &&
             wp->start_col == start_col  &&  wp->end_col == end_col     &&
                                                              !wp->visible)
            poof = TRUE;
         else
            wp = wp->prev;
      }

      if (poof == FALSE) {
         
         wp = g_status.window_list;
         while (wp != NULL && poof == FALSE) {
            if (wp->bottom_line+2 == win->top_line &&
                wp->start_col     == win->start_col &&
                     wp->end_col       == win->end_col   && wp->visible) {
               poof = TRUE;
               top  = wp->top_line;
            } else
               wp = wp->next;
         }
         if (poof == FALSE) {
           
            wp = g_status.window_list;
            while (wp != NULL && poof == FALSE) {
               if (wp->top_line-2 == win->bottom_line  &&
                   wp->start_col     == win->start_col &&
                         wp->end_col    == win->end_col   && wp->visible) {
                  poof = TRUE;
                  bottom = wp->bottom_line;
               } else
                  wp = wp->next;
            }
         }
         if (poof == FALSE) {
           
            wp = g_status.window_list;
            while (wp != NULL && poof == FALSE) {
               if (wp->top_line    == win->top_line  &&
                         wp->bottom_line == win->bottom_line &&
                         wp->start_col-2 == win->end_col     && wp->visible) {
                  poof = TRUE;
                  end_col = wp->end_col;
               } else
                  wp = wp->next;
            }
         }
         if (poof == FALSE) {
           
            wp = g_status.window_list;
            while (wp != NULL && poof == FALSE) {
               if (wp->top_line    == win->top_line  &&
                   wp->bottom_line == win->bottom_line &&
                   wp->end_col+2   == win->start_col   && wp->visible) {
                  poof = TRUE;
                  start_col = wp->start_col;
               } else
                  wp = wp->next;
            }
         }
         if (poof == FALSE) {
           
            wp = g_status.window_list;
            if (wp != NULL) {
               while (wp->next != NULL)
                  wp = wp->next;
            }
            while (wp != NULL && poof == FALSE) {
               if (!wp->visible)
                  poof = TRUE;
               else
                  wp = wp->prev;
            }
         }
      }
      if (poof) {
         wp->visible = TRUE;
         cline = wp->cline - (wp->top_line+wp->ruler);
         wp->top_line = top;
         wp->bottom_line = bottom;
         wp->cline = (wp->top_line+wp->ruler) + cline;
         if (wp->cline > wp->bottom_line)
            wp->cline = wp->top_line+wp->ruler;
         wp->start_col = start_col;
         wp->end_col   = end_col;
         if (start_col == 0 && end_col == g_display.ncols - 1)
            wp->vertical = FALSE;
         else
            wp->vertical = TRUE;
         check_virtual_col( wp, wp->rcol, wp->ccol );
         setup_window( wp );
         show_window_header( wp );
         if (wp->vertical)
            show_vertical_separator( wp );

         
         g_status.current_window = wp;
      }
   }

   if (!poof && g_status.stop != TRUE)
     
      error( WARNING, win->bottom_line, win7 );
   else {

      
      if (--file->ref_count == 0) {

        
         if (file == g_status.marked_file) {
            g_status.marked      = FALSE;
            g_status.marked_file = NULL;
         }

         for (fp=g_status.file_list; fp != NULL; fp=fp->next) {
            if (fp->file_no > file->file_no)
               fp->file_no--;
         }
         file_change = file->file_no;

        
         if (file->prev == NULL)
            g_status.file_list = file->next;
         else
            file->prev->next = file->next;
         if (file->next)
            file->next->prev = file->prev;

        
         ll = file->undo_top;
         while (ll != NULL) {
            temp_ll = ll->next;
            if (ll->line != NULL)
               my_free( ll->line );
            my_free( ll );
            ll = temp_ll;
         }

         ll = file->line_list;
         while (ll != NULL) {
            temp_ll = ll->next;
            if (ll->line != NULL)
               my_free( ll->line );
            my_free( ll );
            ll = temp_ll;
         }

#if defined( __MSC__ )
         _fheapmin( );
#endif

         free( file );
         if (--g_status.file_count) {
            show_file_count( g_status.file_count );
            show_avail_mem( );
         }
      }

      
      if (win->prev == NULL)
         g_status.window_list = win->next;
      else
         win->prev->next = win->next;

      if (win->next)
         win->next->prev = win->prev;

      if (diff.defined  &&  (diff.w1 == win  ||  diff.w2 == win))
         diff.defined = FALSE;

     
      free( win );
      --g_status.window_count;

      if (g_status.stop == FALSE) {
         g_status.current_file = wp->file_info;
         wp->file_info->dirty = LOCAL;
         make_ruler( wp );
         show_ruler( wp );
         show_window_count( g_status.window_count );
         if (file_change) {
            for (wp=g_status.window_list; wp!=NULL; wp=wp->next)
               if (wp->visible)
                  show_window_number_letter( wp );
         } else {
            max_letter = 'a';
            for (wp=g_status.window_list; wp!=NULL; wp=wp->next) {
               if (wp->file_info == file && wp->letter > max_letter)
                  max_letter = wp->letter;
            }
            if (max_letter < file->next_letter - 1)
               file->next_letter = max_letter + 1;
         }
      }
   }

   if (g_status.stop == TRUE) {
      if (g_status.sas_defined && g_status.sas_arg < g_status.sas_argc) {
         show_avail_mem( );
         for (bottom=0; bottom <= g_display.nlines; bottom++)
            eol_clear( 0, bottom, g_display.text_color );
         bottom  = g_display.nlines;
         set_prompt( win18, bottom );
         top = getkey( );
         top = getfunc( top );
         eol_clear( 0, bottom, g_display.text_color );
         if (top == RepeatGrep) {
            g_status.command = RepeatGrep;
            g_status.window_list = g_status.current_window = NULL;
            if (search_and_seize( g_status.window_list ) != ERROR)
               g_status.stop = FALSE;
         }
      }
   }
}



int  create_window( WINDOW **window, int top, int bottom, int start_col,
                    int end_col, file_infos *file )
{
WINDOW *wp;             
register WINDOW *prev;
int  rc;                

   rc = OK;
   
   if ((*window = (WINDOW *)calloc( 1, sizeof(WINDOW) )) == NULL) {
     
      error( WARNING, g_display.nlines, main4 );
      rc = ERROR;
   } else {

    
      wp              = *window;
      wp->file_info   = file;
      wp->top_line    = top+1;
      wp->bottom_line = bottom;
      wp->start_col   = start_col;
      wp->end_col     = end_col;
      wp->bin_offset  = 0;
      wp->ruler       = mode.ruler;
      make_ruler( wp );
      wp->cline       = wp->top_line + wp->ruler;
      if (start_col == 0 && end_col == g_display.ncols-1)
         wp->vertical = FALSE;
      else
         wp->vertical = TRUE;
      wp->prev        = NULL;
      wp->next        = NULL;

      setup_window( wp );

     
      prev = g_status.current_window;
      if (prev) {
         (*window)->prev = prev;
         if (prev->next)
            prev->next->prev = *window;
         (*window)->next = prev->next;
         prev->next = *window;
      }
      if (g_status.window_list == NULL)
         g_status.window_list = *window;

      
      ++file->ref_count;
      file->dirty = LOCAL;
      ++g_status.window_count;
   }
   return( rc );
}