perf hists: Introduce nr_header_lines into struct perf_hpp_list

Currently we support just single line headers, this is first step to
allow more.

Store the number of header lines in perf_hpp_list, which encompasses all
the display/sort entries and is thus suitable to hold this value.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1470583710-1649-2-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 13 insertions, 3 deletions

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index 13d414384739..95f7cf1991fc 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -69,8 +69,11 @@ static u32 hist_browser__nr_entries(struct hist_browser *hb)
 static void hist_browser__update_rows(struct hist_browser *hb)
 {
         struct ui_browser *browser = &hb->b;
-        u16 header_offset = hb->show_headers ? 1 : 0, index_row;
+        struct hists *hists = hb->hists;
+        struct perf_hpp_list *hpp_list = hists->hpp_list;
+        u16 header_offset, index_row;
 
+        header_offset = hb->show_headers ? hpp_list->nr_header_lines : 0;
         browser->rows = browser->height - header_offset;
         /*
          * Verify if we were at the last line and that line isn't
@@ -99,8 +102,11 @@ static void hist_browser__refresh_dimensions(struct ui_browser *browser)
 
 static void hist_browser__gotorc(struct hist_browser *browser, int row, int column)
 {
-        u16 header_offset = browser->show_headers ? 1 : 0;
+        struct hists *hists = browser->hists;
+        struct perf_hpp_list *hpp_list = hists->hpp_list;
+        u16 header_offset;
 
+        header_offset = browser->show_headers ? hpp_list->nr_header_lines : 0;
         ui_browser__gotorc(&browser->b, row + header_offset, column);
 }
 
@@ -1656,10 +1662,13 @@ static unsigned int hist_browser__refresh(struct ui_browser *browser)
         u16 header_offset = 0;
         struct rb_node *nd;
         struct hist_browser *hb = container_of(browser, struct hist_browser, b);
+        struct hists *hists = hb->hists;
 
         if (hb->show_headers) {
+                struct perf_hpp_list *hpp_list = hists->hpp_list;
+
                 hist_browser__show_headers(hb);
-                header_offset = 1;
+                header_offset = hpp_list->nr_header_lines;
         }
 
         ui_browser__hists_init_top(browser);
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 4274969ddc89..be7a17fec889 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -441,6 +441,7 @@ struct perf_hpp_fmt perf_hpp__format[] = {
 struct perf_hpp_list perf_hpp_list = {
         .fields = LIST_HEAD_INIT(perf_hpp_list.fields),
         .sorts  = LIST_HEAD_INIT(perf_hpp_list.sorts),
+        .nr_header_lines = 1,
 };
 
 #undef HPP__COLOR_PRINT_FNS