Added a system caret used for accessibility on Windows.

ui/accessibility/platform/ax_fake_caret_win_interactive_uitest.cc

+// 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.
+
+#include <oleacc.h>
+
+#include "base/macros.h"
+#include "base/path_service.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/win/scoped_comptr.h"
+#include "base/win/scoped_variant.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_tree_host.h"
+#include "ui/base/ime/input_method.h"
+#include "ui/base/ime/text_edit_commands.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/base/ui_base_paths.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/native_widget_types.h"
+#include "ui/gl/test/gl_surface_test_support.h"
+#include "ui/views/controls/textfield/textfield.h"
+#include "ui/views/controls/textfield/textfield_test_api.h"
+#include "ui/views/test/widget_test.h"
+#include "ui/views/widget/widget.h"
+
+namespace ui {
+
+namespace {
+
+class AXFakeCaretWinTest : public views::test::WidgetTest {

[sky, 2017/06/19 15:00:14]

How come you put this code here rather than in views? Isn't this testing views
code?

+ public:
+  AXFakeCaretWinTest() : self_(CHILDID_SELF) {}
+  ~AXFakeCaretWinTest() override {}
+
+  void SetUp() override {
+    gl::GLSurfaceTestSupport::InitializeOneOff();
+    RegisterPathProvider();
+    base::FilePath ui_test_pak_path;
+    ASSERT_TRUE(PathService::Get(UI_TEST_PAK, &ui_test_pak_path));
+    ui::ResourceBundle::InitSharedInstanceWithPakPath(ui_test_pak_path);
+    views::test::WidgetTest::SetUp();
+
+    widget_ = CreateNativeDesktopWidget();
+    widget_->SetBounds(gfx::Rect(0, 0, 200, 200));
+    textfield_ = new views::Textfield();
+    textfield_->SetBounds(0, 0, 200, 20);
+    textfield_->SetText(base::ASCIIToUTF16("Some text."));
+    widget_->GetRootView()->AddChildView(textfield_);
+    views::test::WidgetActivationWaiter waiter(widget_, true);
+    widget_->Show();
+    waiter.Wait();
+    textfield_->RequestFocus();
+    ASSERT_TRUE(widget_->IsActive());
+    ASSERT_TRUE(textfield_->HasFocus());
+    ASSERT_EQ(ui::TEXT_INPUT_TYPE_TEXT,
+              widget_->GetInputMethod()->GetTextInputType());
+  }
+
+  void TearDown() override {
+    widget_->CloseNow();
+    views::test::WidgetTest::TearDown();
+  }
+
+ protected:
+  views::Widget* widget_;

[sky, 2017/06/19 15:00:14]

Initialize widget_ and textfield_ in the member initializer.

+  views::Textfield* textfield_;
+  base::win::ScopedVariant self_;
+
+  DISALLOW_COPY_AND_ASSIGN(AXFakeCaretWinTest);
+};
+
+}  // namespace
+
+TEST_F(AXFakeCaretWinTest, TestOnCaretBoundsChangeInTextField) {
+  views::TextfieldTestApi textfield_test_api(textfield_);
+  base::win::ScopedComPtr<IAccessible> caret_accessible;
+  gfx::NativeWindow native_window = widget_->GetNativeWindow();
+  ASSERT_NE(nullptr, native_window);
+  HWND hwnd = native_window->GetHost()->GetAcceleratedWidget();
+  EXPECT_HRESULT_SUCCEEDED(AccessibleObjectFromWindow(
+      hwnd, static_cast<DWORD>(OBJID_CARET), IID_IAccessible,
+      reinterpret_cast<void**>(caret_accessible.GetAddressOf())));
+
+  textfield_test_api.ExecuteTextEditCommand(
+      TextEditCommand::MOVE_TO_BEGINNING_OF_DOCUMENT);
+  gfx::Point caret_position = textfield_test_api.GetCursorViewOrigin();
+  LONG x, y, width, height;
+  EXPECT_EQ(S_OK,
+            caret_accessible->accLocation(&x, &y, &width, &height, self_));
+  EXPECT_EQ(caret_position.x(), x);
+  EXPECT_EQ(caret_position.y(), y);
+  EXPECT_EQ(1, width);
+
+  textfield_test_api.ExecuteTextEditCommand(
+      TextEditCommand::MOVE_TO_END_OF_DOCUMENT);
+  gfx::Point caret_position2 = textfield_test_api.GetCursorViewOrigin();
+  EXPECT_NE(caret_position, caret_position2);
+  EXPECT_EQ(S_OK,
+            caret_accessible->accLocation(&x, &y, &width, &height, self_));
+  EXPECT_EQ(caret_position2.x(), x);
+  EXPECT_EQ(caret_position2.y(), y);
+  EXPECT_EQ(1, width);
+}
+
+TEST_F(AXFakeCaretWinTest, TestOnInputTypeChangeInTextField) {
+  base::win::ScopedComPtr<IAccessible> caret_accessible;
+  gfx::NativeWindow native_window = widget_->GetNativeWindow();
+  ASSERT_NE(nullptr, native_window);
+  HWND hwnd = native_window->GetHost()->GetAcceleratedWidget();
+  EXPECT_HRESULT_SUCCEEDED(AccessibleObjectFromWindow(
+      hwnd, static_cast<DWORD>(OBJID_CARET), IID_IAccessible,
+      reinterpret_cast<void**>(caret_accessible.GetAddressOf())));
+  LONG x, y, width, height;
+  EXPECT_EQ(S_OK,
+            caret_accessible->accLocation(&x, &y, &width, &height, self_));
+
+  textfield_->SetTextInputType(ui::TEXT_INPUT_TYPE_PASSWORD);
+  // Caret object should still be valid.
+  EXPECT_EQ(S_OK,
+            caret_accessible->accLocation(&x, &y, &width, &height, self_));
+
+  // Retrieving the caret again should also work.
+  caret_accessible.Reset();
+  EXPECT_HRESULT_SUCCEEDED(AccessibleObjectFromWindow(
+      hwnd, static_cast<DWORD>(OBJID_CARET), IID_IAccessible,
+      reinterpret_cast<void**>(caret_accessible.GetAddressOf())));
+  LONG x2, y2, width2, height2;
+  EXPECT_EQ(S_OK,
+            caret_accessible->accLocation(&x2, &y2, &width2, &height2, self_));
+  EXPECT_EQ(x, x2);
+  EXPECT_EQ(y, y2);
+  EXPECT_EQ(width, width2);
+  EXPECT_EQ(height, height2);
+}
+
+TEST_F(AXFakeCaretWinTest, TestMovingWindow) {
+  base::win::ScopedComPtr<IAccessible> caret_accessible;
+  gfx::NativeWindow native_window = widget_->GetNativeWindow();
+  ASSERT_NE(nullptr, native_window);
+  HWND hwnd = native_window->GetHost()->GetAcceleratedWidget();
+  EXPECT_HRESULT_SUCCEEDED(AccessibleObjectFromWindow(
+      hwnd, static_cast<DWORD>(OBJID_CARET), IID_IAccessible,
+      reinterpret_cast<void**>(caret_accessible.GetAddressOf())));
+  LONG x, y, width, height;
+  EXPECT_EQ(S_OK,
+            caret_accessible->accLocation(&x, &y, &width, &height, self_));
+
+  widget_->RunMoveLoop(gfx::Vector2d(), views::Widget::MOVE_LOOP_SOURCE_MOUSE,
+                       views::Widget::MOVE_LOOP_ESCAPE_BEHAVIOR_DONT_HIDE);
+  // Retrieving the caret again should work but its location should be invalid.
+  caret_accessible.Reset();
+  EXPECT_HRESULT_SUCCEEDED(AccessibleObjectFromWindow(
+      hwnd, static_cast<DWORD>(OBJID_CARET), IID_IAccessible,
+      reinterpret_cast<void**>(caret_accessible.GetAddressOf())));
+  LONG x2, y2, width2, height2;
+  EXPECT_EQ(S_FALSE,
+            caret_accessible->accLocation(&x2, &y2, &width2, &height2, self_));
+  EXPECT_EQ(0, x2);
+  EXPECT_EQ(0, y2);
+  EXPECT_EQ(0, width2);
+  EXPECT_EQ(0, height2);
+}
+
+}  // namespace ui