cros: Simple password view for lock. Adds test support.

ash/login/ui/login_password_view.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 "ash/login/ui/login_password_view.h"
+
+#include "ash/resources/vector_icons/vector_icons.h"
+#include "ash/system/tray/size_range_layout.h"
+#include "ash/system/user/button_from_view.h"
+#include "base/strings/utf_string_conversions.h"
+#include "ui/gfx/paint_vector_icon.h"
+#include "ui/views/border.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/controls/separator.h"
+#include "ui/views/controls/textfield/textfield.h"
+#include "ui/views/layout/box_layout.h"
+#include "ui/views/layout/fill_layout.h"
+
+namespace ash {
+namespace {
+
+// Width/height of the submit button.
+constexpr int kSubmitButtonWidthDp = 20;

[James Cook, 2017/06/08 17:26:31]

optional: Pixel constants are generally assumed to be Dp everywhere, so you
could remove the Dp suffix. Up to you.

[jdufault, 2017/06/08 23:12:32]

I've been confused in the past by the unit type so I strongly prefer having a Dp
suffix.

+constexpr int kSubmitButtonHeightDp = 20;
+
+// Width/height of the password inputfield.
+constexpr int kPasswordInputWidthDp = 184;
+constexpr int kPasswordInputHeightDp = 40;
+
+// Total width of the password view.
+constexpr int kPasswordTotalWidthDp = 204;
+
+// Distance between the last password dot and the submit arrow/button.
+constexpr int kDistanceBetweenPasswordAndSubmitDp = 0;
+
+const char* kLoginPasswordViewName = "LoginPasswordView";
+
+}  // namespace
+
+LoginPasswordView::TestApi::TestApi(LoginPasswordView* view) : view_(view) {}
+
+LoginPasswordView::TestApi::~TestApi() = default;
+
+views::View* LoginPasswordView::TestApi::textfield() const {
+  return view_->textfield_;
+}
+
+views::View* LoginPasswordView::TestApi::submit_button() const {
+  return view_->submit_button_;
+}
+
+LoginPasswordView::LoginPasswordView(const OnPasswordSubmit& on_submit)
+    : on_submit_(on_submit) {
+  auto* root_layout = new views::BoxLayout(views::BoxLayout::kVertical);
+  root_layout->set_main_axis_alignment(
+      views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
+  SetLayoutManager(root_layout);
+
+  {

[James Cook, 2017/06/08 17:26:31]

Do you need a new scope here?

[jdufault, 2017/06/08 23:12:32]

Done.

+    auto* row = new views::View();
+    AddChildView(row);
+    auto* layout =
+        new views::BoxLayout(views::BoxLayout::kHorizontal, gfx::Insets(),
+                             kDistanceBetweenPasswordAndSubmitDp);
+    layout->set_main_axis_alignment(
+        views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
+    row->SetLayoutManager(layout);
+
+    // Password textfield. We control the textfield size by sizing the parent
+    // view, as the textfield will expand to fill it.
+    auto* textfield_sizer = new views::View();
+    textfield_sizer->SetLayoutManager(new SizeRangeLayout(
+        gfx::Size(kPasswordInputWidthDp, kPasswordInputHeightDp)));
+    textfield_ = new views::Textfield();
+    textfield_->SetTextInputType(ui::TEXT_INPUT_TYPE_PASSWORD);
+    // TODO(jdufault): Real placeholder text.
+    textfield_->set_placeholder_text(base::ASCIIToUTF16("Password (FIXME)"));
+    textfield_->SetBorder(nullptr);
+
+    textfield_sizer->AddChildView(textfield_);
+    row->AddChildView(textfield_sizer);
+
+    // Submit button.
+    auto* submit_icon = new views::ImageView();
+    submit_icon->SetPreferredSize(
+        gfx::Size(kSubmitButtonWidthDp, kSubmitButtonHeightDp));
+    // TODO(jdufault): Use the real icon.
+    submit_icon->SetImage(
+        gfx::CreateVectorIcon(kSystemMenuArrowRightIcon, SK_ColorBLUE));
+    submit_button_ = new ash::tray::ButtonFromView(
+        submit_icon, this, TrayPopupInkDropStyle::HOST_CENTERED);
+    row->AddChildView(submit_button_);
+  }
+
+  // Separator on bottom.
+  AddChildView(new views::Separator());
+
+  // Make sure the textfield always starts with focus.
+  textfield_->RequestFocus();
+}
+
+LoginPasswordView::~LoginPasswordView() = default;
+
+const char* LoginPasswordView::GetClassName() const {
+  return kLoginPasswordViewName;
+}
+
+gfx::Size LoginPasswordView::CalculatePreferredSize() const {
+  gfx::Size size = views::View::CalculatePreferredSize();
+  size.set_width(kPasswordTotalWidthDp);
+  return size;
+}
+
+bool LoginPasswordView::OnKeyPressed(const ui::KeyEvent& event) {
+  if (event.key_code() == ui::KeyboardCode::VKEY_RETURN) {
+    SubmitPassword();
+    return true;
+  }
+
+  return false;
+}
+
+void LoginPasswordView::ButtonPressed(views::Button* sender,
+                                      const ui::Event& event) {
+  DCHECK_EQ(sender, submit_button_);
+  SubmitPassword();
+}
+
+void LoginPasswordView::SubmitPassword() {
+  if (on_submit_)
+    on_submit_.Run(textfield_->text());
+  textfield_->SetText(base::string16());
+}
+
+}  // namespace ash