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Subject[PATCH 2/2] perf tui: Add help window to show key associations
Date
From: Arnaldo Carvalho de Melo <acme@redhat.com>

Suggested-by: Ingo Molnar <mingo@elte.hu>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/newt.c | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 60 insertions(+), 0 deletions(-)
diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
index 59a63e4..2001d26 100644
--- a/tools/perf/util/newt.c
+++ b/tools/perf/util/newt.c
@@ -167,6 +167,48 @@ out_destroy_form:
return rc;
}

+static int ui__help_window(const char *text)
+{
+ struct newtExitStruct es;
+ newtComponent tb, form = newt_form__new();
+ int rc = -1;
+ int max_len = 0, nr_lines = 0;
+ const char *t;
+
+ if (form == NULL)
+ return -1;
+
+ t = text;
+ while (1) {
+ const char *sep = strchr(t, '\n');
+ int len;
+
+ if (sep == NULL)
+ sep = strchr(t, '\0');
+ len = sep - t;
+ if (max_len < len)
+ max_len = len;
+ ++nr_lines;
+ if (*sep == '\0')
+ break;
+ t = sep + 1;
+ }
+
+ tb = newtTextbox(0, 0, max_len, nr_lines, 0);
+ if (tb == NULL)
+ goto out_destroy_form;
+
+ newtTextboxSetText(tb, text);
+ newtFormAddComponent(form, tb);
+ newtCenteredWindow(max_len, nr_lines, NULL);
+ newtFormRun(form, &es);
+ newtPopWindow();
+ rc = 0;
+out_destroy_form:
+ newtFormDestroy(form);
+ return rc;
+}
+
static bool dialog_yesno(const char *msg)
{
/* newtWinChoice should really be accepting const char pointers... */
@@ -756,6 +798,10 @@ static int hist_browser__populate(struct hist_browser *self, struct hists *hists
newtFormAddHotKey(self->form, 'd');
newtFormAddHotKey(self->form, 'T');
newtFormAddHotKey(self->form, 't');
+ newtFormAddHotKey(self->form, '?');
+ newtFormAddHotKey(self->form, 'H');
+ newtFormAddHotKey(self->form, 'h');
+ newtFormAddHotKey(self->form, NEWT_KEY_F1);
newtFormAddHotKey(self->form, NEWT_KEY_RIGHT);
newtFormAddComponents(self->form, self->tree, NULL);
self->selection = newt__symbol_tree_get_current(self->tree);
@@ -842,6 +888,9 @@ int hists__browse(struct hists *self, const char *helpline, const char *input_na
dso = browser->selection->map ? browser->selection->map->dso : NULL;

if (es.reason == NEWT_EXIT_HOTKEY) {
+ if (es.u.key == NEWT_KEY_F1)
+ goto do_help;
+
switch (toupper(es.u.key)) {
case 'A':
goto do_annotate;
@@ -849,6 +898,17 @@ int hists__browse(struct hists *self, const char *helpline, const char *input_na
goto zoom_dso;
case 'T':
goto zoom_thread;
+ case 'H':
+ case '?':
+do_help:
+ ui__help_window("-> Zoom into DSO/Threads & Annotate current symbol\n"
+ "<- Zoom out\n"
+ "a Annotate current symbol\n"
+ "h/?/F1 Show this window\n"
+ "d Zoom into current DSO\n"
+ "t Zoom into current Thread\n"
+ "q/CTRL+C Exit browser");
+ continue;
default:;
}
if (toupper(es.u.key) == 'Q' ||
--
1.6.2.5
--
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