[RFE][PATCH] Display free space on device in panels (was: Fearure request)

[Jindrich Novy <jnovy redhat com>]

Hello Sergei, mc-devel,

On Wed, 2005-12-28 at 15:33 +0100, Jindrich Novy wrote:
> the following patch adds support for displaying an amount of free
> space figured by stat-ing the current directory. The free space is
> displayed like this:
> 
> 3509M (16%) of 21G
> 
> in the status separator line on each panel. I consider this feature
> helpful as well.

The previous patch contained a mistake that it only displayed free space
calculated from incorrect panel and tried to stat even non-local
filesystems. The attached patch does the same, but better.

Jindrich

-- 
Jindrich Novy <jnovy redhat com>, http://people.redhat.com/jnovy/
(o_                                                           _o)
//\      The worst evil in the world is refusal to think.     //\
V_/_                                                         _\_V

--- mc-4.6.1a/src/screen.c.showfree	2005-12-28 16:49:52.000000000 +0100
+++ mc-4.6.1a/src/screen.c	2005-12-28 17:14:45.000000000 +0100
@@ -49,6 +49,7 @@
 #define WANT_WIDGETS
 #include "main.h"		/* the_menubar */
 #include "unixcompat.h"
+#include "mountlist.h"		/* my_statfs */
 
 #define ELEMENTS(arr) ( sizeof(arr) / sizeof((arr)[0]) )
 
@@ -106,6 +107,12 @@ int filetype_mode = 1;
 /* The hook list for the select file function */
 Hook *select_file_hook = 0;
 
+/* Old current working directory for displaying free space */
+char *old_cwd = NULL;
+
+/* Used to figure out how many free space we have */
+struct my_statfs myfs_stats;
+
 static cb_ret_t panel_callback (Widget *, widget_msg_t msg, int parm);
 static int panel_event (Gpm_Event *event, void *);
 static void paint_frame (WPanel *panel);
@@ -851,6 +858,41 @@ paint_dir (WPanel *panel)
     standend ();
 }
 
+
+static void
+show_free_space(WPanel *panel)
+{
+    struct stat st;
+
+    /* Don't try to stat non-local fs */
+    if (strlen(panel->cwd) >= 2 && panel->cwd[0] == '/' && panel->cwd[1] == '#')
+	return;
+
+    if (old_cwd == NULL || strcmp(old_cwd, panel->cwd)) {
+	init_my_statfs();
+	if (old_cwd != NULL) g_free(old_cwd);
+	old_cwd = g_strdup(panel->cwd);
+    }
+
+    my_statfs (&myfs_stats, panel->cwd);
+    st = panel->dir.list [panel->selected].st;
+	
+    if (myfs_stats.avail > 0 || myfs_stats.total > 0) {
+	char buffer1 [6], buffer2[6], *tmp;
+	size_trunc_len (buffer1, 5, myfs_stats.avail, 1);
+	size_trunc_len (buffer2, 5, myfs_stats.total, 1);
+	tmp = g_strdup_printf (_("%s (%d%%) of %s"), buffer1, myfs_stats.total ?
+			       (int)(100 * (double)myfs_stats.avail / myfs_stats.total) : 0,
+			       buffer2);
+	widget_move (&panel->widget, panel->widget.lines-3, panel->widget.cols-2-strlen(tmp));
+	if (panel->active)
+	    attrset (REVERSE_COLOR);
+	addstr (tmp);
+	attrset (NORMAL_COLOR);
+	g_free (tmp);
+    }
+}
+
 static void
 mini_info_separator (WPanel *panel)
 {
@@ -866,6 +908,7 @@ mini_info_separator (WPanel *panel)
     hline ((slow_terminal ? '-' : ACS_HLINE) | NORMAL_COLOR,
 	   panel->widget.cols - 2);
 #endif				/* !HAVE_SLANG */
+    show_free_space (panel);
 }
 
 static void
@@ -929,6 +972,8 @@ show_dir (WPanel *panel)
     widget_move (&panel->widget, 0, panel->widget.cols - 3);
     addstr ("v");
 
+    mini_info_separator (panel);
+
     if (panel->active)
 	standend ();
 }