Allow draw a part of line if some coordinares are out of screen boundaries.

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

lib/tty/tty-ncurses.c

@@ -330,31 +330,59 @@ tty_getyx (int *py, int *px)
 }
 
 /* --------------------------------------------------------------------------------------------- */
-/* if x < 0 or y < 0, draw line starting from current position */
 
 void
 tty_draw_hline (int y, int x, int ch, int len)
 {
+    int x1;
+
+    if (y < 0 || y >= LINES || x >= COLS)
+        return;
+
+    x1 = x;
+
+    if (x < 0)
+    {
+        len += x;
+        if (len <= 0)
+            return;
+        x = 0;
+    }
+
     if ((chtype) ch == ACS_HLINE)
         ch = mc_tty_frm[MC_TTY_FRM_HORIZ];
 
-    if ((y >= 0) && (x >= 0))
-        move (y, x);
+    move (y, x);
     hline (ch, len);
+    move (y, x1);
 }
 
 /* --------------------------------------------------------------------------------------------- */
-/* if x < 0 or y < 0, draw line starting from current position */
 
 void
 tty_draw_vline (int y, int x, int ch, int len)
 {
+    int y1;
+
+    if (x < 0 || x >= COLS || y >= LINES)
+        return;
+
+    y1 = y;
+
+    if (y < 0)
+    {
+        len += y;
+        if (len <= 0)
+            return;
+        y = 0;
+    }
+
     if ((chtype) ch == ACS_VLINE)
         ch = mc_tty_frm[MC_TTY_FRM_VERT];
 
-    if ((y >= 0) && (x >= 0))
-        move (y, x);
+    move (y, x);
     vline (ch, len);
+    move (y1, x);
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/tty/tty-slang.c

@@ -509,54 +509,68 @@ tty_getyx (int *py, int *px)
 }
 
 /* --------------------------------------------------------------------------------------------- */
-/* if x < 0 or y < 0, draw line staring from current position */
 
 void
 tty_draw_hline (int y, int x, int ch, int len)
 {
+    int x1;
+
+    if (y < 0 || y >= LINES || x >= COLS)
+        return;
+
+    x1 = x;
+
+    if (x < 0)
+    {
+        len += x;
+        if (len <= 0)
+            return;
+        x = 0;
+    }
+
     if (ch == ACS_HLINE)
         ch = mc_tty_frm[MC_TTY_FRM_HORIZ];
-
-    if ((y < 0) || (x < 0))
-    {
-        y = SLsmg_get_row ();
-        x = SLsmg_get_column ();
-    }
-    else
-        SLsmg_gotorc (y, x);
-
     if (ch == 0)
         ch = ACS_HLINE;
 
+    SLsmg_gotorc (y, x);
+
     if (ch == ACS_HLINE)
         SLsmg_draw_hline (len);
     else
         while (len-- != 0)
             tty_print_char (ch);
 
-    SLsmg_gotorc (y, x);
+    SLsmg_gotorc (y, x1);
 }
 
 /* --------------------------------------------------------------------------------------------- */
-/* if x < 0 or y < 0, draw line staring from current position */
 
 void
 tty_draw_vline (int y, int x, int ch, int len)
 {
+    int y1;
+
+    if (x < 0 || x >= COLS || y >= LINES)
+        return;
+
+    y1 = y;
+
+    if (y < 0)
+    {
+        len += y;
+        if (len <= 0)
+            return;
+        y = 0;
+    }
+
     if (ch == ACS_VLINE)
         ch = mc_tty_frm[MC_TTY_FRM_VERT];
-
-    if ((y < 0) || (x < 0))
-    {
-        y = SLsmg_get_row ();
-        x = SLsmg_get_column ();
-    }
-    else
-        SLsmg_gotorc (y, x);
-
     if (ch == 0)
         ch = ACS_VLINE;
 
+    SLsmg_gotorc (y, x);
+
     if (ch == ACS_VLINE)
         SLsmg_draw_vline (len);
     else
@@ -571,7 +585,7 @@ tty_draw_vline (int y, int x, int ch, int len)
         }
     }
 
-    SLsmg_gotorc (y, x);
+    SLsmg_gotorc (y1, x);
 }
 
 /* --------------------------------------------------------------------------------------------- */

lib/tty/tty.c

@@ -177,20 +177,25 @@ tty_print_one_vline (gboolean single)
 void
 tty_draw_box (int y, int x, int ys, int xs, gboolean single)
 {
+    int y2, x2;
+
     ys--;
     xs--;
 
+    y2 = y + ys;
+    x2 = x + xs;
+
     tty_draw_vline (y, x, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
-    tty_draw_vline (y, x + xs, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
+    tty_draw_vline (y, x2, mc_tty_frm[single ? MC_TTY_FRM_VERT : MC_TTY_FRM_DVERT], ys);
     tty_draw_hline (y, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
-    tty_draw_hline (y + ys, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
+    tty_draw_hline (y2, x, mc_tty_frm[single ? MC_TTY_FRM_HORIZ : MC_TTY_FRM_DHORIZ], xs);
     tty_gotoyx (y, x);
     tty_print_alt_char (ACS_ULCORNER, single);
-    tty_gotoyx (y + ys, x);
+    tty_gotoyx (y2, x);
     tty_print_alt_char (ACS_LLCORNER, single);
-    tty_gotoyx (y, x + xs);
+    tty_gotoyx (y, x2);
     tty_print_alt_char (ACS_URCORNER, single);
-    tty_gotoyx (y + ys, x + xs);
+    tty_gotoyx (y2, x2);
     tty_print_alt_char (ACS_LRCORNER, single);
 }
 

lib/widget/menu.c

@@ -121,11 +121,14 @@ menubar_paint_idx (WMenuBar * menubar, unsigned int idx, int color)
     }
     else
     {
+        int yt, xt;
+
         /* menu text */
         tty_setcolor (color);
         widget_move (&menubar->widget, y, x);
         tty_print_char ((unsigned char) entry->first_letter);
-        tty_draw_hline (-1, -1, ' ', menu->max_entry_len + 2);  /* clear line */
+        tty_getyx (&yt, &xt);
+        tty_draw_hline (yt, xt, ' ', menu->max_entry_len + 2);  /* clear line */
         tty_print_string (entry->text.start);
 
         if (entry->text.hotkey != NULL)

src/filemanager/panel.c

@@ -864,7 +864,12 @@ format_file (char *dest, int limit, WPanel * panel, int file_index, int width, i
     }
 
     if (length < width)
-        tty_draw_hline (-1, -1, ' ', width - length);
+    {
+        int y, x;
+
+        tty_getyx (&y, &x);
+        tty_draw_hline (y, x, ' ', width - length);
+    }
 
     return res;
 }
@@ -1583,7 +1588,12 @@ paint_frame (WPanel * panel)
         g_string_free (format_txt, TRUE);
 
         if (width > 0)
-            tty_draw_hline (-1, -1, ' ', width);
+        {
+            int y, x;
+
+            tty_getyx (&y, &x);
+            tty_draw_hline (y, x, ' ', width);
+        }
     }
 
     if (panel->list_type != list_long)

src/viewer/display.c

@@ -141,7 +141,7 @@ mcview_display_status (mcview_t * view)
 
     tty_setcolor (STATUSBAR_COLOR);
     widget_move (view, top, left);
-    tty_draw_hline (-1, -1, ' ', width);
+    tty_draw_hline (top, left, ' ', width);
 
     file_label =
         view->filename_vpath != NULL ?