Implements AssistantOptInView.

Currently always hidden, but a follow up CL will hide/show this view
appropriately based on the user's opt in state.

Another follow up CL will also implement click handling to launch setup.

See bug for screenshot.

Bug: b:112236931
Change-Id: I6db726e8947e9b97772f06bda7e4c55678ab3859
Reviewed-on: https://chromium-review.googlesource.com/1163283
Commit-Queue: David Black <dmblack@google.com>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Xiaohui Chen <xiaohuic@chromium.org>
Cr-Commit-Position: refs/heads/master@{#581075}

ash/BUILD.gn

@@ -89,6 +89,7 @@ component("ash") {
     "assistant/ui/main_stage/assistant_footer_view.h",
     "assistant/ui/main_stage/assistant_header_view.h",
     "assistant/ui/main_stage/assistant_main_stage.h",
+    "assistant/ui/main_stage/assistant_opt_in_view.h",
     "assistant/ui/main_stage/assistant_progress_indicator.h",
     "assistant/ui/main_stage/assistant_query_view.h",
     "assistant/ui/main_stage/assistant_text_element_view.h",
@@ -753,6 +754,7 @@ component("ash") {
     "assistant/ui/main_stage/assistant_footer_view.cc",
     "assistant/ui/main_stage/assistant_header_view.cc",
     "assistant/ui/main_stage/assistant_main_stage.cc",
+    "assistant/ui/main_stage/assistant_opt_in_view.cc",
     "assistant/ui/main_stage/assistant_progress_indicator.cc",
     "assistant/ui/main_stage/assistant_query_view.cc",
     "assistant/ui/main_stage/assistant_text_element_view.cc",

ash/ash_strings.grd

@@ -1709,6 +1709,15 @@ This file contains the strings for ash.
       <message name="IDS_ASH_ASSISTANT_NOTIFICATION_DISPLAY_SOURCE" desc="The name for the source of the assistant notification.">
         Assistant
       </message>
+      <message name="IDS_ASH_ASSISTANT_OPT_IN_UNLOCK_MORE_FEATURES" desc="Message shown in Assistant UI when the user is opted out to promote an opted in experience.">
+        Unlock more Assistant features.
+      </message>
+      <message name="IDS_ASH_ASSISTANT_OPT_IN_GET_STARTED" desc="Message shown in Assistant UI when the user is opted out to promote an opted in experience.">
+        Get Started
+      </message>
+      <message name="IDS_ASH_ASSISTANT_OPT_IN_PROMPT" desc="Message shown in Assistant UI when the user is opted out to promote an opted in experience. $1 = IDS_ASH_ASSISTANT_OPT_IN_UNLOCK_MORE_FEATURES, $2 = IDS_ASH_ASSISTANT_OPT_IN_GET_STARTED">
+        <ph name="UNLOCK_MORE_FEATURES">$1<ex>Unlock more Assistant features.</ex></ph>  <ph name="GET_STARTED">$2<ex>Get Started</ex></ph>
+      </message>
     </messages>
   </release>
 </grit>

ash/assistant/ui/main_stage/assistant_footer_view.cc

@@ -4,7 +4,10 @@
 
 #include "ash/assistant/ui/main_stage/assistant_footer_view.h"
 
+#include <memory>
+
 #include "ash/assistant/assistant_controller.h"
+#include "ash/assistant/ui/main_stage/assistant_opt_in_view.h"
 #include "ash/assistant/ui/main_stage/suggestion_container_view.h"
 #include "ui/views/layout/fill_layout.h"
 
@@ -41,12 +44,18 @@ void AssistantFooterView::ChildVisibilityChanged(views::View* child) {
   PreferredSizeChanged();
 }
 
+// TODO(dmblack): Handle opted out/in state.
 void AssistantFooterView::InitLayout() {
   SetLayoutManager(std::make_unique<views::FillLayout>());
 
   // Suggestion container.
   suggestion_container_ = new SuggestionContainerView(assistant_controller_);
   AddChildView(suggestion_container_);
+
+  // Opt in view.
+  opt_in_view_ = new AssistantOptInView();
+  opt_in_view_->SetVisible(false);
+  AddChildView(opt_in_view_);
 }
 
 }  // namespace ash

ash/assistant/ui/main_stage/assistant_footer_view.h

@@ -11,6 +11,7 @@
 namespace ash {
 
 class AssistantController;
+class AssistantOptInView;
 class SuggestionContainerView;
 
 class AssistantFooterView : public views::View {
@@ -30,6 +31,7 @@ class AssistantFooterView : public views::View {
   AssistantController* const assistant_controller_;  // Owned by Shell.
 
   SuggestionContainerView* suggestion_container_;  // Owned by view hierarchy.
+  AssistantOptInView* opt_in_view_;                // Owned by view hierarchy.
 
   DISALLOW_COPY_AND_ASSIGN(AssistantFooterView);
 };

ash/assistant/ui/main_stage/assistant_opt_in_view.cc

+// Copyright 2018 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/assistant/ui/main_stage/assistant_opt_in_view.h"
+
+#include <memory>
+#include <vector>
+
+#include "ash/assistant/ui/assistant_ui_constants.h"
+#include "ash/strings/grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/color_palette.h"
+#include "ui/views/controls/styled_label.h"
+#include "ui/views/layout/box_layout.h"
+
+namespace ash {
+
+namespace {
+
+// Appearance.
+constexpr int kPreferredHeightDip = 32;
+
+// Helpers ---------------------------------------------------------------------
+
+views::StyledLabel::RangeStyleInfo CreateStyleInfo(
+    gfx::Font::Weight weight = gfx::Font::Weight::NORMAL) {
+  views::StyledLabel::RangeStyleInfo style;
+  style.custom_font = assistant::ui::GetDefaultFontList()
+                          .DeriveWithSizeDelta(2)
+                          .DeriveWithWeight(weight);
+  style.override_color = SK_ColorWHITE;
+  return style;
+}
+
+// AssistantOptInContainer -----------------------------------------------------
+
+class AssistantOptInContainer : public views::View {
+ public:
+  AssistantOptInContainer() = default;
+  ~AssistantOptInContainer() override = default;
+
+  // views::View:
+  gfx::Size CalculatePreferredSize() const override {
+    const int preferred_width = views::View::CalculatePreferredSize().width();
+    return gfx::Size(preferred_width, GetHeightForWidth(preferred_width));
+  }
+
+  int GetHeightForWidth(int width) const override {
+    return kPreferredHeightDip;
+  }
+
+  void ChildPreferredSizeChanged(views::View* child) override {
+    PreferredSizeChanged();
+  }
+
+  void OnPaintBackground(gfx::Canvas* canvas) override {
+    cc::PaintFlags flags;
+    flags.setAntiAlias(true);
+    flags.setColor(gfx::kGoogleBlue500);
+    canvas->DrawRoundRect(GetContentsBounds(), height() / 2, flags);
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AssistantOptInContainer);
+};
+
+}  // namespace
+
+// AssistantOptInView ----------------------------------------------------------
+
+AssistantOptInView::AssistantOptInView() {
+  InitLayout();
+}
+
+AssistantOptInView::~AssistantOptInView() = default;
+
+void AssistantOptInView::ChildPreferredSizeChanged(views::View* child) {
+  PreferredSizeChanged();
+}
+
+void AssistantOptInView::OnBoundsChanged(const gfx::Rect& previous_bounds) {
+  label_->SizeToFit(width());
+}
+
+void AssistantOptInView::InitLayout() {
+  views::BoxLayout* layout_manager =
+      SetLayoutManager(std::make_unique<views::BoxLayout>(
+          views::BoxLayout::Orientation::kHorizontal));
+
+  layout_manager->set_cross_axis_alignment(
+      views::BoxLayout::CrossAxisAlignment::CROSS_AXIS_ALIGNMENT_END);
+
+  layout_manager->set_main_axis_alignment(
+      views::BoxLayout::MainAxisAlignment::MAIN_AXIS_ALIGNMENT_CENTER);
+
+  // Container.
+  AssistantOptInContainer* container = new AssistantOptInContainer();
+
+  layout_manager =
+      container->SetLayoutManager(std::make_unique<views::BoxLayout>(
+          views::BoxLayout::Orientation::kHorizontal,
+          gfx::Insets(0, kPaddingDip)));
+
+  layout_manager->set_cross_axis_alignment(
+      views::BoxLayout::CrossAxisAlignment::CROSS_AXIS_ALIGNMENT_CENTER);
+
+  AddChildView(container);
+
+  // Label.
+  label_ = new views::StyledLabel(base::string16(), /*listener=*/nullptr);
+  label_->set_auto_color_readability_enabled(false);
+  label_->SetHorizontalAlignment(gfx::HorizontalAlignment::ALIGN_CENTER);
+
+  // First substitution string: "Unlock more Assistant features."
+  const base::string16 unlock_features =
+      l10n_util::GetStringUTF16(IDS_ASH_ASSISTANT_OPT_IN_UNLOCK_MORE_FEATURES);
+
+  // Second substitution string: "Get Started".
+  const base::string16 get_started =
+      l10n_util::GetStringUTF16(IDS_ASH_ASSISTANT_OPT_IN_GET_STARTED);
+
+  // Set the text, having replaced placeholders in the opt in prompt with
+  // substitution strings and caching their offset positions for styling.
+  std::vector<size_t> offsets;
+  label_->SetText(l10n_util::GetStringFUTF16(
+      IDS_ASH_ASSISTANT_OPT_IN_PROMPT, unlock_features, get_started, &offsets));
+
+  // Style the first substitution string.
+  label_->AddStyleRange(
+      gfx::Range(offsets.at(0), offsets.at(0) + unlock_features.length()),
+      CreateStyleInfo());
+
+  // Style the second substitution string.
+  label_->AddStyleRange(
+      gfx::Range(offsets.at(1), offsets.at(1) + get_started.length()),
+      CreateStyleInfo(gfx::Font::Weight::BOLD));
+
+  container->AddChildView(label_);
+}
+
+}  // namespace ash

ash/assistant/ui/main_stage/assistant_opt_in_view.h

+// Copyright 2018 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 ASH_ASSISTANT_UI_MAIN_STAGE_ASSISTANT_OPT_IN_VIEW_H_
+#define ASH_ASSISTANT_UI_MAIN_STAGE_ASSISTANT_OPT_IN_VIEW_H_
+
+#include "base/macros.h"
+#include "ui/views/view.h"
+
+namespace views {
+class StyledLabel;
+}  // namespace views
+
+namespace ash {
+
+class AssistantOptInView : public views::View {
+ public:
+  AssistantOptInView();
+  ~AssistantOptInView() override;
+
+  // views::View:
+  void ChildPreferredSizeChanged(views::View* child) override;
+  void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
+
+ private:
+  void InitLayout();
+
+  views::StyledLabel* label_;  // Owned by view hierarchy.
+
+  DISALLOW_COPY_AND_ASSIGN(AssistantOptInView);
+};
+
+}  // namespace ash
+
+#endif  // ASH_ASSISTANT_UI_MAIN_STAGE_ASSISTANT_OPT_IN_VIEW_H_