Adds mojom structure for ui::Accelerator and struct traits

ui/base/accelerators/mojo/accelerator_struct_traits.h

+// 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.
+
+#ifndef UI_BASE_ACCELERATORS_MOJO_ACCELERATOR_STRUCT_TRAITS_H_
+#define UI_BASE_ACCELERATORS_MOJO_ACCELERATOR_STRUCT_TRAITS_H_
+
+#include "ui/base/accelerators/accelerator.h"
+#include "ui/base/accelerators/mojo/accelerator.mojom.h"
+#include "ui/events/keycodes/keyboard_codes.h"
+
+namespace mojo {
+
+template <>
+struct EnumTraits<ui::mojom::AcceleratorKeyState, ui::Accelerator::KeyState> {
+  static ui::mojom::AcceleratorKeyState ToMojom(
+      ui::Accelerator::KeyState input) {
+    switch (input) {
+      case ui::Accelerator::KeyState::PRESSED:
+        return ui::mojom::AcceleratorKeyState::PRESSED;
+      case ui::Accelerator::KeyState::RELEASED:
+        return ui::mojom::AcceleratorKeyState::RELEASED;
+    }
+    NOTREACHED();
+    return ui::mojom::AcceleratorKeyState::PRESSED;
+  }
+
+  static bool FromMojom(ui::mojom::AcceleratorKeyState input,
+                        ui::Accelerator::KeyState* out) {
+    switch (input) {
+      case ui::mojom::AcceleratorKeyState::PRESSED:
+        *out = ui::Accelerator::KeyState::PRESSED;
+        return true;
+      case ui::mojom::AcceleratorKeyState::RELEASED:
+        *out = ui::Accelerator::KeyState::RELEASED;
+        return true;
+    }
+    NOTREACHED();
+    return false;
+  }
+};
+
+template <>
+struct StructTraits<ui::mojom::AcceleratorDataView, ui::Accelerator> {
+  static int32_t key_code(const ui::Accelerator& p) {
+    return static_cast<int32_t>(p.key_code());
+  }
+  static ui::Accelerator::KeyState key_state(const ui::Accelerator& p) {
+    return p.key_state();
+  }
+  static int32_t modifiers(const ui::Accelerator& p) { return p.modifiers(); }
+  static bool Read(ui::mojom::AcceleratorDataView data, ui::Accelerator* out) {
+    ui::Accelerator::KeyState key_state;
+    if (!data.ReadKeyState(&key_state))
+      return false;
+    *out = ui::Accelerator(static_cast<ui::KeyboardCode>(data.key_code()),
+                           data.modifiers());
+    out->set_key_state(key_state);
+    return true;
+  }
+};
+
+}  // namespace mojo
+
+#endif  // UI_BASE_ACCELERATORS_MOJO_ACCELERATOR_STRUCT_TRAITS_H_