[tip:perf/urgent] perf hists browser: Fix column indentation on --hierarchy

[tip-bot for Namhyung Kim]

Commit-ID:  b9bf911e990a189f89147ee6b66660a153ed0125
Gitweb:     http://git.kernel.org/tip/b9bf911e990a189f89147ee6b66660a153ed0125
Author:     Namhyung Kim <namhyung@xxxxxxxxxx>
AuthorDate: Tue, 8 Nov 2016 22:08:32 +0900
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Wed, 9 Nov 2016 11:45:58 -0300

perf hists browser: Fix column indentation on --hierarchy

When horizontall scrolling is used in hierarchy mode, the the right most
column has unnecessary indentation.  Actually it's needed only if some
of left (overhead) columns were shown.

Signed-off-by: Namhyung Kim <namhyung@xxxxxxxxxx>
Tested-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Tested-by: Markus Trippelsdorf <markus@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Link: http://lkml.kernel.org/r/20161108130833.9263-4-namhyung@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/ui/browsers/hists.c | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index e767fbd..a53fef0 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1361,8 +1361,10 @@ static int hist_browser__show_hierarchy_entry(struct hist_browser *browser,
 		width -= hpp.buf - s;
 	}
 
-	ui_browser__write_nstring(&browser->b, "", hierarchy_indent);
-	width -= hierarchy_indent;
+	if (!first) {
+		ui_browser__write_nstring(&browser->b, "", hierarchy_indent);
+		width -= hierarchy_indent;
+	}
 
 	if (column >= browser->b.horiz_scroll) {
 		char s[2048];
@@ -1565,6 +1567,7 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
 	if (advance_hpp_check(&dummy_hpp, ret))
 		return ret;
 
+	first_node = true;
 	/* the first hpp_list_node is for overhead columns */
 	fmt_node = list_first_entry(&hists->hpp_formats,
 				    struct perf_hpp_list_node, list);
@@ -1579,12 +1582,16 @@ static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *brows
 		ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "  ");
 		if (advance_hpp_check(&dummy_hpp, ret))
 			break;
+
+		first_node = false;
 	}
 
-	ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "%*s",
-			indent * HIERARCHY_INDENT, "");
-	if (advance_hpp_check(&dummy_hpp, ret))
-		return ret;
+	if (!first_node) {
+		ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "%*s",
+				indent * HIERARCHY_INDENT, "");
+		if (advance_hpp_check(&dummy_hpp, ret))
+			return ret;
+	}
 
 	first_node = true;
 	list_for_each_entry_continue(fmt_node, &hists->hpp_formats, list) {