perf ui: Add ui_helpline methods

Initially this was just to be able to have a printf like method to
prepare the formatted string and then pass to newtPushHelpLine, but as
we already have for ui_progress, etc, its a step in identifying a
restricted, highlevel set of widgets we can then have implementations
for multiple widget sets (GTK, etc).

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>

1 files changed, 50 insertions, 19 deletions

diff --git a/tools/perf/util/newt.c b/tools/perf/util/newt.c
index 638b519e72b8..daa86efffce6 100644
--- a/tools/perf/util/newt.c
+++ b/tools/perf/util/newt.c
@@ -57,6 +57,43 @@ void ui_progress__delete(struct ui_progress *self)
         free(self);
 }
 
+static void ui_helpline__pop(void)
+{
+        newtPopHelpLine();
+}
+
+static void ui_helpline__push(const char *msg)
+{
+        newtPushHelpLine(msg);
+}
+
+static void ui_helpline__vpush(const char *fmt, va_list ap)
+{
+        char *s;
+
+        if (vasprintf(&s, fmt, ap) < 0)
+                vfprintf(stderr, fmt, ap);
+        else {
+                ui_helpline__push(s);
+                free(s);
+        }
+}
+
+static void ui_helpline__fpush(const char *fmt, ...)
+{
+        va_list ap;
+
+        va_start(ap, fmt);
+        ui_helpline__vpush(fmt, ap);
+        va_end(ap);
+}
+
+static void ui_helpline__puts(const char *msg)
+{
+        ui_helpline__pop();
+        ui_helpline__push(msg);
+}
+
 static char browser__last_msg[1024];
 
 int browser__show_help(const char *format, va_list ap)
@@ -69,8 +106,7 @@ int browser__show_help(const char *format, va_list ap)
         backlog += ret;
 
         if (browser__last_msg[backlog - 1] == '\n') {
-                newtPopHelpLine();
-                newtPushHelpLine(browser__last_msg);
+                ui_helpline__puts(browser__last_msg);
                 newtRefresh();
                 backlog = 0;
         }
@@ -340,7 +376,7 @@ static void map_symbol__annotate_browser(const struct map_symbol *self,
         if (fp == NULL)
                 goto out_free_str;
 
-        newtPushHelpLine("Press ESC to exit");
+        ui_helpline__push("Press ESC to exit");
         newtGetScreenSize(&cols, &rows);
         tree = newtListbox(0, 0, rows - 5, NEWT_FLAG_SCROLL);
 
@@ -370,7 +406,7 @@ static void map_symbol__annotate_browser(const struct map_symbol *self,
         newtFormRun(form, &es);
         newtFormDestroy(form);
         newtPopWindow();
-        newtPopHelpLine();
+        ui_helpline__pop();
 out_free_str:
         free(str);
 }
@@ -539,7 +575,7 @@ int hists__browse(struct hists *self, const char *helpline, const char *input_na
         if (browser == NULL)
                 return -1;
 
-        newtPushHelpLine(helpline);
+        ui_helpline__push(helpline);
 
         hist_browser__title(msg, sizeof(msg), input_name,
                             dso_filter, thread_filter);
@@ -602,8 +638,7 @@ int hists__browse(struct hists *self, const char *helpline, const char *input_na
 do_annotate:
                 if (choice == annotate) {
                         if (browser->selection->map->dso->origin == DSO__ORIG_KERNEL) {
-                                newtPopHelpLine();
-                                newtPushHelpLine("No vmlinux file found, can't "
+                                ui_helpline__puts("No vmlinux file found, can't "
                                                  "annotate with just a "
                                                  "kallsyms file");
                                 continue;
@@ -611,13 +646,11 @@ do_annotate:
                         map_symbol__annotate_browser(browser->selection, input_name);
                 } else if (choice == zoom_dso) {
                         if (dso_filter) {
-                                newtPopHelpLine();
+                                ui_helpline__pop();
                                 dso_filter = NULL;
                         } else {
-                                snprintf(msg, sizeof(msg),
-                                         "To zoom out press -> + \"Zoom out of %s DSO\"",
-                                         dso->kernel ? "the Kernel" : dso->short_name);
-                                newtPushHelpLine(msg);
+                                ui_helpline__fpush("To zoom out press -> + \"Zoom out of %s DSO\"",
+                                                   dso->kernel ? "the Kernel" : dso->short_name);
                                 dso_filter = dso;
                         }
                         hists__filter_by_dso(self, dso_filter);
@@ -627,14 +660,12 @@ do_annotate:
                                 goto out;
                 } else if (choice == zoom_thread) {
                         if (thread_filter) {
-                                newtPopHelpLine();
+                                ui_helpline__pop();
                                 thread_filter = NULL;
                         } else {
-                                snprintf(msg, sizeof(msg),
-                                         "To zoom out press -> + \"Zoom out of %s(%d) thread\"",
-                                         (thread->comm_set ? thread->comm : ""),
-                                         thread->pid);
-                                newtPushHelpLine(msg);
+                                ui_helpline__fpush("To zoom out press -> + \"Zoom out of %s(%d) thread\"",
+                                                   thread->comm_set ? thread->comm : "",
+                                                   thread->pid);
                                 thread_filter = thread;
                         }
                         hists__filter_by_thread(self, thread_filter);
@@ -658,7 +689,7 @@ void setup_browser(void)
         use_browser = true;
         newtInit();
         newtCls();
-        newtPushHelpLine(" ");
+        ui_helpline__puts(" ");
 }
 
 void exit_browser(bool wait_for_ok)