uterm: add WAKEUP and SLEEP signals

Notify all listeners when going to sleep or waking up. This allows saving
energy in the listeners by not redrawing the screen while being asleep.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>

diff --git a/src/uterm.h b/src/uterm.h
index 413d600..c65689b 100644 (file)
--- a/src/uterm.h
+++ b/src/uterm.h
@@ -146,6 +146,8 @@ enum uterm_video_type {
 };
 
 enum uterm_video_action {
+       UTERM_WAKE_UP,
+       UTERM_SLEEP,
        UTERM_NEW,
        UTERM_GONE,
 };

diff --git a/src/uterm_video.c b/src/uterm_video.c
index 02f3a79..5b74eee 100644 (file)
--- a/src/uterm_video.c
+++ b/src/uterm_video.c
@@ -488,17 +488,25 @@ void uterm_video_sleep(struct uterm_video *video)
        if (!video || !video_is_awake(video))
                return;
 
+       VIDEO_CB(video, NULL, UTERM_SLEEP);
        VIDEO_CALL(video->ops->sleep, 0, video);
 }
 
 int uterm_video_wake_up(struct uterm_video *video)
 {
+       int ret;
+
        if (!video)
                return -EINVAL;
        if (video_is_awake(video))
                return 0;
 
-       return VIDEO_CALL(video->ops->wake_up, 0, video);
+       ret = VIDEO_CALL(video->ops->wake_up, 0, video);
+       if (ret)
+               return ret;
+
+       VIDEO_CB(video, NULL, UTERM_WAKE_UP);
+       return 0;
 }
 
 bool uterm_video_is_awake(struct uterm_video *video)