Wayland: Add key repeat

Add support for repeating keys to the Wayland input backend.
Unfortunately the repeat delay/interval is hardcoded into the Clutter
backend, as Wayland doesn't yet tell clients what the global values
should be.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>
(cherry picked from commit 1c7a740385abf4abed9dce162797653331f93615)

Signed-off-by: Emmanuele Bassi <ebassi@gnome.org>

2 files changed, 63 insertions, 0 deletions

diff --git a/clutter/wayland/clutter-input-device-wayland.c b/clutter/wayland/clutter-input-device-wayland.c
index 756a156fc..89c8fc569 100644
--- a/clutter/wayland/clutter-input-device-wayland.c
+++ b/clutter/wayland/clutter-input-device-wayland.c
@@ -216,6 +216,38 @@ clutter_wayland_handle_keymap (void *data,
     }
 }
 
+/* XXX: Need a wl_keyboard event to harmonise these across clients. */
+#define KEY_REPEAT_DELAY 660
+#define KEY_REPEAT_INTERVAL 40
+
+static gboolean
+clutter_wayland_repeat_key (void *data)
+{
+  ClutterInputDeviceWayland *device = data;
+  ClutterStageCogl          *stage_cogl = device->keyboard_focus;
+  ClutterEvent              *event;
+
+  event = _clutter_key_event_new_from_evdev ((ClutterInputDevice *) device,
+                                             stage_cogl->wrapper,
+                                             device->xkb,
+                                             device->repeat_time,
+                                             device->repeat_key,
+                                             1);
+  device->repeat_time += KEY_REPEAT_INTERVAL;
+  _clutter_event_push (event, FALSE);
+
+  if (!device->is_initial_repeat)
+    return TRUE;
+
+  g_source_remove (device->repeat_source);
+  device->repeat_source = g_timeout_add (KEY_REPEAT_INTERVAL,
+                                         clutter_wayland_repeat_key,
+                                         device);
+  device->is_initial_repeat = FALSE;
+
+  return FALSE;
+}
+
 static void
 clutter_wayland_handle_key (void *data,
                             struct wl_keyboard *keyboard,
@@ -235,6 +267,26 @@ clutter_wayland_handle_key (void *data,
                                              _time, key, state);
 
   _clutter_event_push (event, FALSE);
+
+  if (!xkb_key_repeats (xkb_state_get_map (device->xkb), key))
+    return;
+
+  if (state)
+    {
+      if (device->repeat_key != XKB_KEYCODE_INVALID)
+        g_source_remove (device->repeat_source);
+      device->repeat_key = key;
+      device->repeat_time = _time + KEY_REPEAT_DELAY;
+      device->repeat_source = g_timeout_add (KEY_REPEAT_DELAY,
+                                             clutter_wayland_repeat_key,
+                                             device);
+      device->is_initial_repeat = TRUE;
+    }
+  else if (device->repeat_key == key)
+    {
+      g_source_remove (device->repeat_source);
+      device->repeat_key = XKB_KEYCODE_INVALID;
+    }
 }
 
 static void
@@ -374,6 +426,12 @@ clutter_wayland_handle_keyboard_leave (void *data,
                                CLUTTER_STAGE_STATE_ACTIVATED,
                                0);
 
+  if (device->repeat_key != XKB_KEYCODE_INVALID)
+    {
+      g_source_remove (device->repeat_source);
+      device->repeat_key = XKB_KEYCODE_INVALID;
+    }
+
   device->keyboard_focus = NULL;
 }
 
diff --git a/clutter/wayland/clutter-input-device-wayland.h b/clutter/wayland/clutter-input-device-wayland.h
index 723bde0fe..fc79ffbbc 100644
--- a/clutter/wayland/clutter-input-device-wayland.h
+++ b/clutter/wayland/clutter-input-device-wayland.h
@@ -26,6 +26,7 @@
 #ifndef __CLUTTER_INPUT_DEVICE_WAYLAND_H__
 #define __CLUTTER_INPUT_DEVICE_WAYLAND_H__
 
+#include <xkbcommon/xkbcommon.h>
 #include <glib-object.h>
 #include <clutter/clutter-event.h>
 
@@ -48,6 +49,10 @@ struct _ClutterInputDeviceWayland
   struct xkb_state       *xkb;
   gint                    has_pointer;
   gint                    has_keyboard;
+  xkb_keycode_t           repeat_key;
+  guint                   repeat_time;
+  guint                   repeat_source;
+  gboolean                is_initial_repeat;
 };
 
 GType clutter_input_device_wayland_get_type (void) G_GNUC_CONST;