1 files changed, 75 insertions, 0 deletions

diff --git a/tools/perf/util/ui/setup.c b/tools/perf/util/ui/setup.c
index 1e6ba06980c4..c4e025fbd6b9 100644
--- a/tools/perf/util/ui/setup.c
+++ b/tools/perf/util/ui/setup.c
@@ -7,10 +7,85 @@
 #include "browser.h"
 #include "helpline.h"
 #include "ui.h"
+#include "util.h"
 #include "libslang.h"
+#include "keysyms.h"
 
 pthread_mutex_t ui__lock = PTHREAD_MUTEX_INITIALIZER;
 
+static volatile int ui__need_resize;
+
+void ui__refresh_dimensions(bool force)
+{
+        if (force || ui__need_resize) {
+                ui__need_resize = 0;
+                pthread_mutex_lock(&ui__lock);
+                SLtt_get_screen_size();
+                SLsmg_reinit_smg();
+                pthread_mutex_unlock(&ui__lock);
+        }
+}
+
+static void ui__sigwinch(int sig __used)
+{
+        ui__need_resize = 1;
+}
+
+static void ui__setup_sigwinch(void)
+{
+        static bool done;
+
+        if (done)
+                return;
+
+        done = true;
+        pthread__unblock_sigwinch();
+        signal(SIGWINCH, ui__sigwinch);
+}
+
+int ui__getch(int delay_secs)
+{
+        struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
+        fd_set read_set;
+        int err, key;
+
+        ui__setup_sigwinch();
+
+        FD_ZERO(&read_set);
+        FD_SET(0, &read_set);
+
+        if (delay_secs) {
+                timeout.tv_sec = delay_secs;
+                timeout.tv_usec = 0;
+        }
+
+        err = select(1, &read_set, NULL, NULL, ptimeout);
+
+        if (err == 0)
+                return K_TIMER;
+
+        if (err == -1) {
+                if (errno == EINTR)
+                        return K_RESIZE;
+                return K_ERROR;
+        }
+
+        key = SLang_getkey();
+        if (key != K_ESC)
+                return key;
+
+        FD_ZERO(&read_set);
+        FD_SET(0, &read_set);
+        timeout.tv_sec = 0;
+        timeout.tv_usec = 20;
+        err = select(1, &read_set, NULL, NULL, &timeout);
+        if (err == 0)
+                return K_ESC;
+
+        SLang_ungetkey(key);
+        return SLkp_getkey();
+}
+
 static void newt_suspend(void *d __used)
 {
         newtSuspend();