[PATCH] wt-status: take the alignment burden off translators

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

It's not easy for translators to see spaces in these strings have to
align, especially when there are no guarantees that these strings are
grouped together in .po files.

Refactor the code and do the alignment automatically. Let the
translator specify how big the alignment is, though, in case some
languages need more than 12 columns for the preceding text.

Noticed-by: Wolfgang Rohdewald <wolfgang@rohdewald.de>
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Ralf and Quan, don't update your translations yet. If this change
 gets merged it'll simplify your task a bit.

 wt-status.c | 51 +++++++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 43 insertions(+), 8 deletions(-)

diff --git a/wt-status.c b/wt-status.c
index b4e44ba..f9715d3 100644
--- a/wt-status.c
+++ b/wt-status.c
@@ -15,6 +15,7 @@
 #include "submodule.h"
 #include "column.h"
 #include "strbuf.h"
+#include "utf8.h"
 
 static char default_wt_status_colors[][COLOR_MAXLEN] = {
 	GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
@@ -276,6 +277,10 @@ static void wt_status_print_change_data(struct wt_status *s,
 	const char *one, *two;
 	struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
 	struct strbuf extra = STRBUF_INIT;
+	const char *what;
+	static const char *spaces = "                                ";
+	static int width = -1;
+	int len;
 
 	one_name = two_name = it->string;
 	switch (change_type) {
@@ -309,32 +314,62 @@ static void wt_status_print_change_data(struct wt_status *s,
 	status_printf(s, color(WT_STATUS_HEADER, s), "\t");
 	switch (status) {
 	case DIFF_STATUS_ADDED:
-		status_printf_more(s, c, _("new file:   %s"), one);
+		what = _("new file");
 		break;
 	case DIFF_STATUS_COPIED:
-		status_printf_more(s, c, _("copied:     %s -> %s"), one, two);
+		what = _("copied");
 		break;
 	case DIFF_STATUS_DELETED:
-		status_printf_more(s, c, _("deleted:    %s"), one);
+		what = _("deleted");
 		break;
 	case DIFF_STATUS_MODIFIED:
-		status_printf_more(s, c, _("modified:   %s"), one);
+		what = _("modified");
 		break;
 	case DIFF_STATUS_RENAMED:
-		status_printf_more(s, c, _("renamed:    %s -> %s"), one, two);
+		what = _("renamed");
 		break;
 	case DIFF_STATUS_TYPE_CHANGED:
-		status_printf_more(s, c, _("typechange: %s"), one);
+		what = _("typechange");
 		break;
 	case DIFF_STATUS_UNKNOWN:
-		status_printf_more(s, c, _("unknown:    %s"), one);
+		what = _("unknown");
 		break;
 	case DIFF_STATUS_UNMERGED:
-		status_printf_more(s, c, _("unmerged:   %s"), one);
+		what = _("unmerged");
 		break;
 	default:
 		die(_("bug: unhandled diff status %c"), status);
 	}
+	if (width == -1) {
+		/*
+		 * Translators: if you do translate this, replace it
+		 * with a decimal number of how many columns needed
+		 * to align file names in "git status":
+		 *
+		 * |<-columns->|
+		 *
+		 *   unmerged: foo.c
+		 *   copied:   foo.c -> bar.c
+		 *
+		 * The default value is 12. Normally you would not
+		 * need to translate this at all unless the translated
+		 * strings are longer than 12 columns and therefore
+		 * break alignment.
+		 */
+		width = atoi(_("<wt-status.c:width>"));
+		if (width <= 0 || width > 32)
+			width = 12;
+	}
+	if (width > utf8_strwidth(what) + 1)
+		len = width - utf8_strwidth(what) - 1;
+	else
+		len = 0;
+	if (status == DIFF_STATUS_COPIED || status == DIFF_STATUS_RENAMED)
+		status_printf_more(s, c, "%s:%.*s%s -> %s",
+				   what, len, spaces, one, two);
+	else
+		status_printf_more(s, c, "%s:%.*s%s",
+				   what, len, spaces, one);
 	if (extra.len) {
 		status_printf_more(s, color(WT_STATUS_HEADER, s), "%s", extra.buf);
 		strbuf_release(&extra);
-- 
1.8.2.83.gc99314b