Add gvr-android-keyboard to third_party/

This CL adds the header and .aidl file that Chrome needs to dynamically load the
Keyboard API implementation from the Daydream Keyboard apk.

Bug: 641470
Change-Id: Id47074cc0fdff786d0ab23dd0e43faabc0c2b023
Reviewed-on: https://chromium-review.googlesource.com/771537
Commit-Queue: Yash Malik <ymalik@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Reviewed-by: Biao She <bshe@chromium.org>
Reviewed-by: Max Moroz <mmoroz@chromium.org>
Reviewed-by: Brett Wilson <brettw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#517235}

third_party/gvr-android-keyboard/BUILD.gn

+# Copyright 2017 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+import("//build/config/android/rules.gni")
+
+android_library("kb_java") {
+  deps = [
+    "//base:base_java",
+  ]
+  srcjar_deps = [ ":aidl" ]
+}
+
+android_aidl("aidl") {
+  sources = [
+    "com/google/vr/keyboard/IGvrKeyboardLoader.aidl",
+  ]
+}
+
+config("kb_config") {
+  include_dirs = [ "src/libraries/headers/" ]
+}

third_party/gvr-android-keyboard/LICENSE

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+
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+   you may not use this file except in compliance with the License.
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third_party/gvr-android-keyboard/OWNERS

+ymalik@chromium.org
+asimjour@chromium.org
+
+# COMPONENT: UI>Browser>VR

third_party/gvr-android-keyboard/README.chromium

+Name: GVR Keyboard
+Short Name: gvr-android-keyboard
+URL: NA
+Version: 0
+Date: 2017-11-14
+License: Apache 2.0
+License File: LICENSE
+Security Critical: yes
+
+Description:
+Chrome VR dynamically loads the keyboard API packaged as part of the GVR
+keyboard APK. This directory includes the header for the API and the resources
+needed to dynamically load the implementation. Note that the GVR keyboard isn't
+uploaded to a public repository yet.
+
+Local Modifications:
+We added a dependency to gvr_types.h in third_party/gvr-android-sdk, which is
+needed by gvr_header.h.

third_party/gvr-android-keyboard/com/google/vr/keyboard/IGvrKeyboardLoader.aidl

+/* Copyright 2017 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.vr.keyboard;
+
+/**
+ * @hide
+ * Provides loading of the GVR keyboard library.
+ */
+interface IGvrKeyboardLoader {
+  /**
+   * Attempts to load (dlopen) GVR keyboard library.
+   * <p>
+   * The library will be loaded only if a matching library can be found
+   * that is recent enough. If the library is out-of-date, or cannot be found,
+   * 0 will be returned.
+   *
+   * @param the version of the target library.
+   * @return the native handle to the library. 0 if the load fails.
+   */
+  long loadGvrKeyboard(long version) = 1;
+
+  /**
+   * Closes a library (dlclose).
+   *
+   * @param nativeLibrary the native handle of the library to be closed.
+   */
+  void closeGvrKeyboard(long nativeLibrary) = 2;
+}

third_party/gvr-android-keyboard/com/google/vr/keyboard/OWNERS

+per-file *.aidl=set noparent
+per-file *.aidl=file://ipc/SECURITY_OWNERS

third_party/gvr-android-keyboard/src/libraries/headers/vr/gvr/capi/include/gvr_keyboard.h

+/* Copyright 2017 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef VR_GVR_KEYBOARD_CAPI_INCLUDE_GVR_KEYBOARD_H_
+#define VR_GVR_KEYBOARD_CAPI_INCLUDE_GVR_KEYBOARD_H_
+
+#ifdef __ANDROID__
+#include <jni.h>
+#endif
+
+#include "third_party/gvr-android-sdk/src/libraries/headers/vr/gvr/capi/include/gvr_types.h"
+/// @defgroup keyboard GVR Keyboard API
+/// @brief The Google VR Keyboard provides a virtual keyboard designed for VR
+/// apps.
+///
+/// Any changes to this API must be backwards compatible (ie old clients should
+/// be able to call a newer SDK). Any time a change is made, the API_VERSION in
+/// GvrKeyboardLoaderClient.java should be updated.
+///
+/// ## API usage
+///
+/// *   `gvr_keyboard_initialize()` initializes the Android JVM. This must be
+///     done only once during the entire lifecycle of your application,
+///     and before calling any other GVR Keyboard API calls.
+/// *   `gvr_keyboard_create()` creates a keyboard and returns a pointer to
+///     its context. The keyboard is not shown.
+/// *   Call `gvr_keyboard_advance_frame()` on every frame after a keyboard is
+///     created with `gvr_create_keyboard()`. This is necessary even when the
+///     keyboard is not visible as there may be events to process.
+/// *   Call `gvr_keyboard_render()` after `gvr_keyboard_advance_frame()` twice
+///     to render keyboard for both eyes.
+/// *   `gvr_keyboard_show()` displays the keyboard at a specified location.
+/// *   `gvr_keyboard_set_input_mode()` sets input mode of the keyboard.
+/// *   Use `gvr_keyboard_on_event()` to send controller updates to the
+///     keyboard. This should be done on every frame the keyboard is visible.
+/// *   `gvr_keyboard_hide()` hides the keyboard.
+/// *   Call `gvr_keyboard_destroy()` to destroy the keyboard when it is no
+///     longer used.
+///
+/// This API is designed to be thread-safe, with some exceptions.
+/// `gvr_keyboard_advance_frame()` and `gvr_keyboard_render()` must be called
+/// from the GL thread.
+/// `gvr_keyboard_destroy()` has potential threading issues as it destroys the
+/// `gvr_keyboard_context` pointer. Make sure that when `gvr_keyboard_destroy()`
+/// is called, `gvr_keyboard_context` is not used by another thread.
+
+/// @{
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/// Events from the keyboard. To receive events, set a `gvr_keyboard_callback`
+/// callback when you create the keyboard with `gvr_keyboard_create`.
+typedef enum {
+  /// Unknown error.
+  GVR_KEYBOARD_ERROR_UNKNOWN = 0,
+  /// The keyboard service could not be connected. This is usually due to the
+  /// keyboard service not being installed.
+  GVR_KEYBOARD_ERROR_SERVICE_NOT_CONNECTED = 1,
+  /// No locale was found in the keyboard service.
+  GVR_KEYBOARD_ERROR_NO_LOCALES_FOUND = 2,
+  /// The keyboard SDK tried to load dynamically but failed. This is usually due
+  /// to the keyboard service not being installed or being out of date.
+  GVR_KEYBOARD_ERROR_SDK_LOAD_FAILED = 3,
+  /// Keyboard becomes visible.
+  GVR_KEYBOARD_SHOWN = 4,
+  /// Keyboard becomes hidden.
+  GVR_KEYBOARD_HIDDEN = 5,
+  /// Text has been updated.
+  GVR_KEYBOARD_TEXT_UPDATED = 6,
+  /// Text has been committed.
+  GVR_KEYBOARD_TEXT_COMMITTED = 7,
+} gvr_keyboard_event;
+
+/// The input mode of the keyboard.
+typedef enum {
+  /// Default keyboard layout.
+  GVR_KEYBOARD_MODE_DEFAULT = 0,
+  /// Keyboard layout for inputing numbers.
+  GVR_KEYBOARD_MODE_NUMERIC = 1,
+} gvr_keyboard_input_mode;
+
+typedef struct gvr_mat4f gvr_mat4f;
+
+typedef struct gvr_keyboard_context_ gvr_keyboard_context;
+
+/// Callback for various keyboard events.
+/// @param void* Custom closure pointer.
+typedef void (*gvr_keyboard_callback)(void* closure, int32_t event);
+
+#ifdef __ANDROID__
+/// Initializes the JVM for Android. This must be called exactly once, and
+/// before using the Keyboard API.
+///
+/// @param env The JNIEnv associated with the current thread.
+/// @param app_context The Android application context. This must be the
+///     application context, NOT an Activity context. (Note: From any Android
+///     Activity in your app, you can call getApplicationContext() to retrieve
+///     the application context).
+/// @param class_loader The class loader to use when loading Java classes.
+///     This must be your app's main class loader, usually accessible through
+///     activity.getClassLoader() on any of your Activities.
+void gvr_keyboard_initialize(JNIEnv* env,
+                             jobject app_context,
+                             jobject class_loader);
+#endif
+
+/// Creates a keyboard and connects to to the Keyboard Service.
+///
+/// @param closure Custom closure pointer, passed to all the callbacks.
+/// @param callback  A pointer to the callback function to receive events.
+/// @return A pointer to the new keyboard's context.
+gvr_keyboard_context* gvr_keyboard_create(void* closure,
+                                          gvr_keyboard_callback callback);
+
+/// Gets the current input mode.
+///
+/// @param context A pointer to the keyboard's context.
+/// @return The input mode of the keyboard.
+int32_t gvr_keyboard_get_input_mode(gvr_keyboard_context* context);
+
+/// Sets the input mode of the keyboard.
+///
+/// @param context A pointer to the keyboard context.
+/// @param input_mode The input mode to set.
+void gvr_keyboard_set_input_mode(gvr_keyboard_context* context,
+                                 int32_t input_mode);
+
+/// Gets the recommended matrix for showing the keyboard. Use
+/// `distance_from_eye` to specify the distance from the eyes to the keyboard.
+///
+/// @param distance_from_eye How far away to render the keyboard, in meters.
+///     This number should normally be within [1.0f, 5.0f].
+/// @param matrix The matrix to be filled in with the recommended matrix values.
+void gvr_keyboard_get_recommended_world_from_keyboard_matrix(
+    float distance_from_eye,
+    gvr_mat4f* matrix);
+
+/// Shows the keyboard, as specified by `keyboard_matrix`. The matrix should
+/// generally be filled using `gvr_keyboard_get_recommended_matrix()`.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param keyboard_matrix A transformation matrix defining where and how to
+///     show the keyboard.
+void gvr_keyboard_show(gvr_keyboard_context* context);
+
+/// Sets keyboard to world matrix.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param matrix The keyboard to world matrix.
+void gvr_keyboard_set_world_from_keyboard_matrix(gvr_keyboard_context* context,
+                                                 const gvr_mat4f* matrix);
+
+/// Updates the keyboard with the controller's button state.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param button_index The controller's button defined in gvr.
+/// @param pressed Whether button is being pressed.
+void gvr_keyboard_update_button_state(gvr_keyboard_context* context,
+                                      int32_t button_index,
+                                      bool pressed);
+
+/// Updates the ray of the controller.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param start Start position of the ray.
+/// @param end End position of the ray.
+/// @param hit Hit position if the ray intersects with the keyboard.
+/// @return true if the ray hits the keyboard.
+bool gvr_keyboard_update_controller_ray(gvr_keyboard_context* context,
+                                        const gvr_vec3f* start,
+                                        const gvr_vec3f* end,
+                                        gvr_vec3f* hit);
+
+/// Gets the contents of the keyboard's text field.
+///
+/// @param context A pointer to the keyboard's context.
+/// @return The current text field content of the keyboard. Caller must free
+///     the returned pointer when it's not being used.
+char* gvr_keyboard_get_text(gvr_keyboard_context* context);
+
+/// Sets the contents of the keyboard's text field.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param edit_text The new text field content.
+void gvr_keyboard_set_text(gvr_keyboard_context* context, const char* text);
+
+/// Gets selection range of the keyboard's text field.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param start A pointer to receive the start index, must not be NULL.
+/// @param start A pointer to receive the end index, must not be NULL.
+void gvr_keyboard_get_selection_indices(gvr_keyboard_context* context,
+                                        size_t* start,
+                                        size_t* end);
+
+/// Sets selection range of the keyboard's text field.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param start start index.
+/// @param start end index.
+void gvr_keyboard_set_selection_indices(gvr_keyboard_context* context,
+                                        size_t start,
+                                        size_t end);
+
+/// Gets composing range of the keyboard's text field.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param start A pointer to receive the start index, must not be NULL.
+/// @param start A pointer to receive the end index, must not be NULL.
+void gvr_keyboard_get_composing_indices(gvr_keyboard_context* context,
+                                        size_t* start,
+                                        size_t* end);
+
+/// Sets composing range of the keyboard's text field.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param start start index.
+/// @param start end index.
+void gvr_keyboard_set_composing_indices(gvr_keyboard_context* context,
+                                        size_t start,
+                                        size_t end);
+
+/// Sets frame timestamp. This should be called once per frame.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param time The scheduled time of the next frame.
+void gvr_keyboard_set_frame_time(gvr_keyboard_context* context,
+                                 const gvr_clock_time_point* time);
+
+/// Sets world to camera matrix.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param eye_type Left or right eye variable
+/// @param matrix The eye from world matrix.
+void gvr_keyboard_set_eye_from_world_matrix(gvr_keyboard_context* context,
+                                            int32_t eye_type,
+                                            const gvr_mat4f* matrix);
+
+/// Sets projection matrix.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param eye_type Left or right eye variable
+/// @param projection The current camera's projection matrix
+void gvr_keyboard_set_projection_matrix(gvr_keyboard_context* context,
+                                        int32_t eye_type,
+                                        const gvr_mat4f* projection);
+/// Sets viewport.
+///
+/// @param context A pointer to the keyboard's context.
+/// @param eye_type Left or right eye variable
+/// @param viewport The current camera's viewport
+void gvr_keyboard_set_viewport(gvr_keyboard_context* context,
+                               int32_t eye_type,
+                               const gvr_recti* viewport);
+
+/// Handles the new frame. This should be called once from the GL thread on
+/// every frame after the keyboard context is created and before calling
+/// `gvr_keyboard_render`.
+///
+/// @param context A pointer to the keyboard's context.
+void gvr_keyboard_advance_frame(gvr_keyboard_context* context);
+
+/// Renders the keyboard for a given eye. This should be called from the GL
+/// thread.
+///
+/// @param eye_type gvr eye type.
+void gvr_keyboard_render(gvr_keyboard_context* context, int32_t eye_type);
+
+/// Hides the keyboard.
+///
+/// @param context A pointer to the keyboard's context.
+void gvr_keyboard_hide(gvr_keyboard_context* context);
+
+/// Destroys the keyboard. Resources related to the keyboard are released.
+/// The `gvr_keyboard_context` pointer is also deleted. This part is not
+/// thread-safe, so you must make sure that no other thread is using
+/// `gvr_keyboard_context` when this method is getting called.
+///
+/// @param context A pointer to the keyboard context pointer to destroy.
+void gvr_keyboard_destroy(gvr_keyboard_context** context);
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+/// @}
+
+#endif  // VR_GVR_KEYBOARD_CAPI_INCLUDE_GVR_KEYBOARD_H_