input-settings: Handle device-to-output mapping

For each device that can be mapped (touchscreens, tablets), the output
will be fetched from settings and matched with the currently connected
ones. If a match is found, the device matrix will be found out from the
output configuration and set on the device.

This is also updated both individually for newly connected devices, and
collectively on output configuration changes.

https://bugzilla.gnome.org/show_bug.cgi?id=739397

1 files changed, 214 insertions, 0 deletions

diff --git a/src/backends/meta-input-settings.c b/src/backends/meta-input-settings.c
index f3148672d..dc792e013 100644
--- a/src/backends/meta-input-settings.c
+++ b/src/backends/meta-input-settings.c
@@ -41,14 +41,27 @@
 #include <meta/util.h>
 
 typedef struct _MetaInputSettingsPrivate MetaInputSettingsPrivate;
+typedef struct _DeviceMappingInfo DeviceMappingInfo;
+
+struct _DeviceMappingInfo
+{
+  MetaInputSettings *input_settings;
+  ClutterInputDevice *device;
+  GSettings *settings;
+};
 
 struct _MetaInputSettingsPrivate
 {
   ClutterDeviceManager *device_manager;
+  MetaMonitorManager *monitor_manager;
+  guint monitors_changed_id;
+
   GSettings *mouse_settings;
   GSettings *touchpad_settings;
   GSettings *trackball_settings;
   GSettings *keyboard_settings;
+
+  GHashTable *mappable_devices;
 };
 
 typedef void (*ConfigBoolFunc)   (MetaInputSettings  *input_settings,
@@ -98,6 +111,17 @@ meta_input_settings_dispose (GObject *object)
   g_clear_object (&priv->touchpad_settings);
   g_clear_object (&priv->trackball_settings);
   g_clear_object (&priv->keyboard_settings);
+  g_clear_pointer (&priv->mappable_devices, g_hash_table_unref);
+
+  if (priv->monitors_changed_id && priv->monitor_manager)
+    {
+      g_signal_handler_disconnect (priv->monitor_manager,
+                                   priv->monitors_changed_id);
+      priv->monitors_changed_id = 0;
+    }
+
+  g_clear_object (&priv->monitor_manager);
+
   G_OBJECT_CLASS (meta_input_settings_parent_class)->dispose (object);
 }
 
@@ -451,6 +475,65 @@ update_keyboard_repeat (MetaInputSettings *input_settings)
                                              repeat, delay, interval);
 }
 
+static MetaOutput *
+meta_input_settings_find_output (MetaInputSettings  *input_settings,
+                                 GSettings          *settings,
+                                 ClutterInputDevice *device)
+{
+  MetaInputSettingsPrivate *priv;
+  guint n_values, n_outputs, i;
+  MetaOutput *outputs;
+  gchar **edid;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+  edid = g_settings_get_strv (settings, "display");
+  n_values = g_strv_length (edid);
+
+  if (n_values != 3)
+    {
+      g_warning ("EDID configuration for device '%s' "
+                 "is incorrect, must have 3 values",
+                 clutter_input_device_get_device_name (device));
+      return NULL;
+    }
+
+  if (!*edid[0] && !*edid[1] && !*edid[2])
+    return NULL;
+
+  outputs = meta_monitor_manager_get_outputs (priv->monitor_manager,
+                                              &n_outputs);
+  for (i = 0; i < n_outputs; i++)
+    {
+      if (g_strcmp0 (outputs[i].vendor, edid[0]) == 0 &&
+          g_strcmp0 (outputs[i].product, edid[1]) == 0 &&
+          g_strcmp0 (outputs[i].serial, edid[2]) == 0)
+        return &outputs[i];
+    }
+
+  return NULL;
+}
+
+static void
+update_device_display (MetaInputSettings  *input_settings,
+                       GSettings          *settings,
+                       ClutterInputDevice *device)
+{
+  MetaInputSettingsClass *input_settings_class;
+  MetaInputSettingsPrivate *priv;
+  gfloat matrix[6] = { 1, 0, 0, 0, 1, 0 };
+  MetaOutput *output;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+  input_settings_class = META_INPUT_SETTINGS_GET_CLASS (input_settings);
+  output = meta_input_settings_find_output (input_settings, settings, device);
+
+  if (output)
+    meta_monitor_manager_get_monitor_matrix (priv->monitor_manager,
+                                             output, matrix);
+
+  input_settings_class->set_matrix (input_settings, device, matrix);
+}
+
 static void
 meta_input_settings_changed_cb (GSettings  *settings,
                                 const char *key,
@@ -502,6 +585,100 @@ meta_input_settings_changed_cb (GSettings  *settings,
 }
 
 static void
+mapped_device_changed_cb (GSettings         *settings,
+                          const gchar       *key,
+                          DeviceMappingInfo *info)
+{
+  if (strcmp (key, "display") == 0)
+    update_device_display (info->input_settings, settings, info->device);
+}
+
+static GSettings *
+lookup_device_settings (ClutterInputDevice *device)
+{
+  const gchar *group, *schema, *vendor, *product;
+  ClutterInputDeviceType type;
+  GSettings *settings;
+  gchar *path;
+
+  type = clutter_input_device_get_device_type (device);
+
+  if (type == CLUTTER_TOUCHSCREEN_DEVICE)
+    {
+      group = "touchscreens";
+      schema = "org.gnome.desktop.peripherals.touchscreen";
+    }
+  else if (type == CLUTTER_TABLET_DEVICE ||
+           type == CLUTTER_PEN_DEVICE ||
+           type == CLUTTER_ERASER_DEVICE ||
+           type == CLUTTER_CURSOR_DEVICE)
+    {
+      group = "tablets";
+      schema = "org.gnome.desktop.peripherals.tablet";
+    }
+  else
+    return NULL;
+
+  vendor = clutter_input_device_get_vendor_id (device);
+  product = clutter_input_device_get_product_id (device);
+  path = g_strdup_printf ("/org/gnome/desktop/peripherals/%s/%s:%s/",
+                          group, vendor, product);
+
+  settings = g_settings_new_with_path (schema, path);
+  g_free (path);
+
+  return settings;
+}
+
+static void
+monitors_changed_cb (MetaMonitorManager *monitor_manager,
+                     MetaInputSettings  *input_settings)
+{
+  MetaInputSettingsPrivate *priv;
+  ClutterInputDevice *device;
+  GSettings *settings;
+  GHashTableIter iter;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+  g_hash_table_iter_init (&iter, priv->mappable_devices);
+
+  while (g_hash_table_iter_next (&iter, (gpointer *) &device,
+                                 (gpointer *) &settings))
+    update_device_display (input_settings, settings, device);
+}
+
+static gboolean
+check_add_mappable_device (MetaInputSettings  *input_settings,
+                           ClutterInputDevice *device)
+{
+  MetaInputSettingsPrivate *priv;
+  DeviceMappingInfo *info;
+  GSettings *settings;
+
+  settings = lookup_device_settings (device);
+
+  if (!settings)
+    return FALSE;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+
+  info = g_new0 (DeviceMappingInfo, 1);
+  info->input_settings = input_settings;
+  info->device = device;
+  info->settings = settings;
+
+  g_signal_connect_data (settings, "changed",
+                         G_CALLBACK (mapped_device_changed_cb),
+                         info, (GClosureNotify) g_free, 0);
+
+  g_hash_table_insert (priv->mappable_devices, device, settings);
+
+  update_device_display (input_settings, settings, device);
+
+  return TRUE;
+}
+
+static void
 meta_input_settings_device_added (ClutterDeviceManager *device_manager,
                                   ClutterInputDevice   *device,
                                   MetaInputSettings    *input_settings)
@@ -535,6 +712,10 @@ meta_input_settings_device_added (ClutterDeviceManager *device_manager,
       update_device_natural_scroll (input_settings, priv->touchpad_settings,
                                     device, type);
     }
+  else
+    {
+      check_add_mappable_device (input_settings, device);
+    }
 }
 
 static void
@@ -542,6 +723,30 @@ meta_input_settings_device_removed (ClutterDeviceManager *device_manager,
                                     ClutterInputDevice   *device,
                                     MetaInputSettings    *input_settings)
 {
+  MetaInputSettingsPrivate *priv;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+  g_hash_table_remove (priv->mappable_devices, device);
+}
+
+static void
+check_mappable_devices (MetaInputSettings *input_settings)
+{
+  MetaInputSettingsPrivate *priv;
+  const GSList *devices, *l;
+
+  priv = meta_input_settings_get_instance_private (input_settings);
+  devices = clutter_device_manager_peek_devices (priv->device_manager);
+
+  for (l = devices; l; l = l->next)
+    {
+      ClutterInputDevice *device = l->data;
+
+      if (clutter_input_device_get_device_mode (device) == CLUTTER_INPUT_MODE_MASTER)
+        continue;
+
+      check_add_mappable_device (input_settings, device);
+    }
 }
 
 static void
@@ -566,6 +771,8 @@ meta_input_settings_constructed (GObject *object)
                        CLUTTER_POINTER_DEVICE);
 
   update_keyboard_repeat (input_settings);
+
+  check_mappable_devices (input_settings);
 }
 
 static void
@@ -604,6 +811,13 @@ meta_input_settings_init (MetaInputSettings *settings)
   priv->keyboard_settings = g_settings_new ("org.gnome.desktop.peripherals.keyboard");
   g_signal_connect (priv->keyboard_settings, "changed",
                     G_CALLBACK (meta_input_settings_changed_cb), settings);
+
+  priv->mappable_devices =
+    g_hash_table_new_full (NULL, NULL, NULL, (GDestroyNotify) g_object_unref);
+
+  priv->monitor_manager = g_object_ref (meta_monitor_manager_get ());
+  g_signal_connect (priv->monitor_manager, "monitors-changed",
+                    G_CALLBACK (monitors_changed_cb), settings);
 }
 
 MetaInputSettings *