[gnome-flashback] input-settings: support mouse and trackball accel profile

[Alberts Muktupāvels <muktupavels src gnome org>]

commit a130f67f49ccacc9c07c766295b36a13a84de399
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Thu Jul 28 23:22:24 2016 +0300

    input-settings: support mouse and trackball accel profile
    
    Support changing the mouse and trackball acceleration profile. This
    makes it possible to for example disable pointer acceleration by
    choosing the 'flat' profile.
    
    Original commit (author - Jonas Ådahl <jadahl gmail com>):
    https://git.gnome.org/browse/mutter/commit/?id=23c4ac6c7fecdd4eb70d64a8fbb6e4b25f5d03f0

 .../libinput-settings/gf-input-settings.c          |  118 ++++++++++++++++++++
 1 files changed, 118 insertions(+), 0 deletions(-)
---
diff --git a/gnome-flashback/libinput-settings/gf-input-settings.c 
b/gnome-flashback/libinput-settings/gf-input-settings.c
index 3a32b73..a8bd6a6 100644
--- a/gnome-flashback/libinput-settings/gf-input-settings.c
+++ b/gnome-flashback/libinput-settings/gf-input-settings.c
@@ -292,6 +292,63 @@ set_invert_scroll (GfInputSettings *settings,
 }
 
 static void
+set_accel_profile (GfInputSettings             *settings,
+                   GdkDevice                   *device,
+                   GDesktopPointerAccelProfile  profile)
+{
+  guchar *available;
+  guchar *defaults;
+  guchar values[2] = { 0 }; /* adaptive, flat */
+
+  available = get_property (settings, device,
+                            "libinput Accel Profiles Available",
+                            XA_INTEGER, 8, 2);
+
+  defaults = get_property (settings, device,
+                           "libinput Accel Profile Enabled Default",
+                           XA_INTEGER, 8, 2);
+
+  if (!available || !defaults)
+    {
+      if (available)
+        XFree (available);
+
+      if (defaults)
+        XFree (defaults);
+
+      return;
+    }
+
+  memcpy (values, defaults, 2);
+
+  switch (profile)
+    {
+      case G_DESKTOP_POINTER_ACCEL_PROFILE_FLAT:
+        values[0] = 0;
+        values[1] = 1;
+        break;
+      case G_DESKTOP_POINTER_ACCEL_PROFILE_ADAPTIVE:
+        values[0] = 1;
+        values[1] = 0;
+        break;
+      case G_DESKTOP_POINTER_ACCEL_PROFILE_DEFAULT:
+        break;
+      default:
+        g_warn_if_reached ();
+        break;
+    }
+
+  change_property (settings, device, "libinput Accel Profile Enabled",
+                   XA_INTEGER, 8, &values, 2);
+
+  if (available)
+    XFree (available);
+
+  if (defaults)
+    XFree (defaults);
+}
+
+static void
 set_tap_enabled (GfInputSettings *settings,
                  GdkDevice       *device,
                  gboolean         enabled)
@@ -636,6 +693,27 @@ update_mouse_natural_scroll (GfInputSettings *settings,
 }
 
 static void
+update_mouse_accel_profile (GfInputSettings *settings,
+                            GdkDevice       *device)
+{
+  GDesktopPointerAccelProfile profile;
+
+  if (device && gdk_device_get_source (device) != GDK_SOURCE_MOUSE)
+    return;
+
+  profile = g_settings_get_enum (settings->mouse, "accel-profile");
+
+  if (device)
+    {
+      device_set_uint_setting (settings, device, set_accel_profile, profile);
+    }
+  else
+    {
+      set_uint_setting (settings, GDK_SOURCE_MOUSE, set_accel_profile, profile);
+    }
+}
+
+static void
 update_touchpad_speed (GfInputSettings *settings,
                        GdkDevice       *device)
 {
@@ -834,6 +912,40 @@ update_trackball_scroll_button (GfInputSettings *settings,
 }
 
 static void
+update_trackball_accel_profile (GfInputSettings *settings,
+                                GdkDevice       *device)
+{
+  GDesktopPointerAccelProfile profile;
+
+  if (device && !device_is_trackball (device))
+    return;
+
+  profile = g_settings_get_enum (settings->trackball, "accel-profile");
+
+  if (device)
+    {
+      device_set_uint_setting (settings, device, set_accel_profile, profile);
+    }
+  else
+    {
+      const GList *devices;
+      const GList *l;
+
+      devices = gdk_seat_get_slaves (settings->seat, GDK_SEAT_CAPABILITY_ALL);
+
+      for (l = devices; l; l = l->next)
+        {
+          device = GDK_DEVICE (l->data);
+
+          if (!device_is_trackball (device))
+            continue;
+
+          device_set_uint_setting (settings, device, set_accel_profile, profile);
+        }
+    }
+}
+
+static void
 update_keyboard_repeat (GfInputSettings *settings)
 {
   gboolean repeat;
@@ -868,6 +980,8 @@ settings_changed_cb (GSettings       *gsettings,
         update_mouse_speed (settings, NULL);
       else if (strcmp (key, "natural-scroll") == 0)
         update_mouse_natural_scroll (settings, NULL);
+      else if (strcmp (key, "accel-profile") == 0)
+        update_mouse_accel_profile (settings, NULL);
     }
   else if (gsettings == settings->touchpad)
     {
@@ -892,6 +1006,8 @@ settings_changed_cb (GSettings       *gsettings,
     {
       if (strcmp (key, "scroll-wheel-emulation-button") == 0)
         update_trackball_scroll_button (settings, NULL);
+      else if (strcmp (key, "accel-profile") == 0)
+        update_trackball_accel_profile (settings, NULL);
     }
   else if (gsettings == settings->keyboard)
     {
@@ -1080,6 +1196,7 @@ apply_device_settings (GfInputSettings *settings,
   update_mouse_left_handed (settings, device);
   update_mouse_speed (settings, device);
   update_mouse_natural_scroll (settings, device);
+  update_mouse_accel_profile (settings, device);
 
   update_touchpad_left_handed (settings, device);
   update_touchpad_speed (settings, device);
@@ -1091,6 +1208,7 @@ apply_device_settings (GfInputSettings *settings,
   update_touchpad_click_method (settings, device);
 
   update_trackball_scroll_button (settings, device);
+  update_trackball_accel_profile (settings, device);
 }
 
 static void