Ticket #2086 (viewer: incorrect scroll down/up in wrap mode)

fixed: scroll down/scroll up in wrap mode.

Signed-off-by: Ilia Maslakov <il.smind@gmail.com>

    fixed: scroll up in wrap mode.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>

src/viewer/lib.c

@@ -91,6 +91,8 @@ mcview_toggle_magic_mode (mcview_t * view)
 void
 mcview_toggle_wrap_mode (mcview_t * view)
 {
+    if (view->text_wrap_mode)
+        view->dpy_start = mcview_bol (view, view->dpy_start);
     view->text_wrap_mode = !view->text_wrap_mode;
     view->dpy_bbar_dirty = TRUE;
     view->dirty++;

src/viewer/move.c

@@ -108,12 +108,21 @@ mcview_move_up (mcview_t * view, off_t lines)
         off_t i;
         for (i = 0; i < lines; i++)
         {
-            new_offset = mcview_bol (view, view->dpy_start);
+            off_t cur_bol;
+            cur_bol = new_offset = mcview_bol (view, view->dpy_start);
             if (new_offset > 0)
                 new_offset--;
             new_offset = mcview_bol (view, new_offset);
             if (new_offset < 0)
                 new_offset = 0;
+            if (view->text_wrap_mode)
+            {
+                size_t last_row_length = (view->dpy_start - new_offset) % view->data_area.width;
+                if (last_row_length != 0 && cur_bol == view->dpy_start)
+                    new_offset = max (new_offset, view->dpy_start - last_row_length);
+                else
+                    new_offset = max (new_offset, view->dpy_start - view->data_area.width);
+            }
             view->dpy_start = new_offset;
         }
     }
@@ -149,6 +158,8 @@ mcview_move_down (mcview_t * view, off_t lines)
         {
             off_t new_offset;
             new_offset = mcview_eol (view, view->dpy_start);
+            if (view->text_wrap_mode)
+                new_offset = min (new_offset, view->dpy_start + view->data_area.width);
             view->dpy_start = new_offset;
         }
     }