perf ui browser: Allow overriding refresh_dimensions method

Some browsers, like the hist_browser, may want to be notified everytime
a refresh_dimensions is needed, so that it can reset ui_browser->rows,
for instance, or do some other related reaction to screen resizings.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ielvluuemzn30bneh0zk3twi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

2 files changed, 6 insertions, 2 deletions

diff --git a/tools/perf/ui/browser.c b/tools/perf/ui/browser.c
index adb294a3ec08..6680fa5cb9dd 100644
--- a/tools/perf/ui/browser.c
+++ b/tools/perf/ui/browser.c
@@ -250,7 +250,10 @@ int ui_browser__show(struct ui_browser *browser, const char *title,
         int err;
         va_list ap;
 
-        ui_browser__refresh_dimensions(browser);
+        if (browser->refresh_dimensions == NULL)
+                browser->refresh_dimensions = ui_browser__refresh_dimensions;
+
+        browser->refresh_dimensions(browser);
 
         pthread_mutex_lock(&ui__lock);
         __ui_browser__show_title(browser, title);
@@ -367,7 +370,7 @@ int ui_browser__run(struct ui_browser *browser, int delay_secs)
 
                 if (key == K_RESIZE) {
                         ui__refresh_dimensions(false);
-                        ui_browser__refresh_dimensions(browser);
+                        browser->refresh_dimensions(browser);
                         __ui_browser__show_title(browser, browser->title);
                         ui_helpline__puts(browser->helpline);
                         continue;
diff --git a/tools/perf/ui/browser.h b/tools/perf/ui/browser.h
index cb8f39a1646f..92ae72113965 100644
--- a/tools/perf/ui/browser.h
+++ b/tools/perf/ui/browser.h
@@ -19,6 +19,7 @@ struct ui_browser {
         void          *priv;
         const char    *title;
         char          *helpline;
+        void          (*refresh_dimensions)(struct ui_browser *browser);
         unsigned int  (*refresh)(struct ui_browser *browser);
         void          (*write)(struct ui_browser *browser, void *entry, int row);
         void          (*seek)(struct ui_browser *browser, off_t offset, int whence);