src/usr.bin/tmux/window.c - diff

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Diff for /src/usr.bin/tmux/window.c between version 1.43 and 1.44

-version 1.43, 2010/02/06 17:15:33
+version 1.44, 2010/03/22 19:02:54
 Line 623
 Line 623
 Line 623
                  fatal("ioctl failed");
  }
+ /*
+  * Enter alternative screen mode. A copy of the visible screen is saved and the
+  * history is not updated
+  */
+ void
+ window_pane_alternate_on(struct window_pane *wp, struct grid_cell *gc)
+ {
+         struct screen   *s = &wp->base;
+         u_int            sx, sy;
+         if (wp->saved_grid != NULL)
+                 return;
+         if (!options_get_number(&wp->window->options, "alternate-screen"))
+                 return;
+         sx = screen_size_x(s);
+         sy = screen_size_y(s);
+         wp->saved_grid = grid_create(sx, sy, 0);
+         grid_duplicate_lines(wp->saved_grid, 0, s->grid, screen_hsize(s), sy);
+         wp->saved_cx = s->cx;
+         wp->saved_cy = s->cy;
+         memcpy(&wp->saved_cell, gc, sizeof wp->saved_cell);
+         grid_view_clear(s->grid, 0, 0, sx, sy);
+         wp->base.grid->flags &= ~GRID_HISTORY;
+         wp->flags |= PANE_REDRAW;
+ }
+ /* Exit alternate screen mode and restore the copied grid. */
+ void
+ window_pane_alternate_off(struct window_pane *wp, struct grid_cell *gc)
+ {
+         struct screen   *s = &wp->base;
+         u_int            sx, sy;
+         if (wp->saved_grid == NULL)
+                 return;
+         if (!options_get_number(&wp->window->options, "alternate-screen"))
+                 return;
+         sx = screen_size_x(s);
+         sy = screen_size_y(s);
+         /*
+          * If the current size is bigger, temporarily resize to the old size
+          * before copying back.
+          */
+         if (sy > wp->saved_grid->sy)
+                 screen_resize(s, sx, wp->saved_grid->sy);
+         /* Restore the grid, cursor position and cell. */
+         grid_duplicate_lines(s->grid, screen_hsize(s), wp->saved_grid, 0, sy);
+         s->cx = wp->saved_cx;
+         if (s->cx > screen_size_x(s) - 1)
+                 s->cx = screen_size_x(s) - 1;
+         s->cy = wp->saved_cy;
+         if (s->cy > screen_size_y(s) - 1)
+                 s->cy = screen_size_y(s) - 1;
+         memcpy(gc, &wp->saved_cell, sizeof *gc);
+         /*
+          * Turn history back on (so resize can use it) and then resize back to
+          * the current size.
+          */
+         wp->base.grid->flags |= GRID_HISTORY;
+         if (sy > wp->saved_grid->sy)
+                 screen_resize(s, sx, sy);
+         grid_destroy(wp->saved_grid);
+         wp->saved_grid = NULL;
+         wp->flags |= PANE_REDRAW;
+ }
  int
  window_pane_set_mode(struct window_pane *wp, const struct window_mode *mode)
  {