Revert of Making answer card to behave like other results.

ui/app_list/views/search_result_answer_card_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 "ui/app_list/views/search_result_answer_card_view.h"
-
-#include "ui/app_list/app_list_constants.h"
-#include "ui/app_list/app_list_features.h"
-#include "ui/app_list/views/search_result_page_view.h"
-#include "ui/views/background.h"
-#include "ui/views/controls/button/custom_button.h"
-#include "ui/views/layout/box_layout.h"
-#include "ui/views/layout/fill_layout.h"
-
-namespace app_list {
-
-namespace {
-
-// Answer card relevance is high to always have it first.
-constexpr double kSearchAnswerCardRelevance = 100;
-
-// Container of the search answer view.
-class SearchAnswerContainerView : public views::CustomButton {
- public:
-  explicit SearchAnswerContainerView(views::View* search_results_page_view)
-      : CustomButton(nullptr),
-        search_results_page_view_(search_results_page_view) {
-    // Center the card horizontally in the container.
-    views::BoxLayout* answer_container_layout =
-        new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0);
-    answer_container_layout->set_main_axis_alignment(
-        views::BoxLayout::MAIN_AXIS_ALIGNMENT_CENTER);
-    SetLayoutManager(answer_container_layout);
-  }
-
-  void SetSelected(bool selected) {
-    if (selected == selected_)
-      return;
-    selected_ = selected;
-    UpdateBackgroundColor();
-  }
-
-  // views::CustomButton overrides:
-  void ChildPreferredSizeChanged(View* child) override {
-    // Card size changed.
-    if (visible())
-      search_results_page_view_->Layout();
-  }
-
-  int GetHeightForWidth(int w) const override {
-    return visible() ? CustomButton::GetHeightForWidth(w) : 0;
-  }
-
-  const char* GetClassName() const override {
-    return "SearchAnswerContainerView";
-  }
-
-  void StateChanged(ButtonState old_state) override { UpdateBackgroundColor(); }
-
- private:
-  void UpdateBackgroundColor() {
-    views::Background* background = nullptr;
-
-    if (selected_) {
-      background = views::Background::CreateSolidBackground(kSelectedColor);
-    } else if (state() == STATE_HOVERED || state() == STATE_PRESSED) {
-      background = views::Background::CreateSolidBackground(kHighlightedColor);
-    }
-
-    set_background(background);
-    SchedulePaint();
-  }
-
-  views::View* const search_results_page_view_;
-  bool selected_ = false;
-
-  DISALLOW_COPY_AND_ASSIGN(SearchAnswerContainerView);
-};
-
-}  // namespace
-
-SearchResultAnswerCardView::SearchResultAnswerCardView(
-    AppListModel* model,
-    SearchResultPageView* search_results_page_view,
-    views::View* search_answer_view)
-    : model_(model),
-      search_answer_container_view_(
-          new SearchAnswerContainerView(search_results_page_view)) {
-  search_answer_container_view_->SetVisible(false);
-  search_answer_container_view_->AddChildView(search_answer_view);
-  AddChildView(search_answer_container_view_);
-  model->AddObserver(this);
-  SetLayoutManager(new views::FillLayout);
-}
-
-SearchResultAnswerCardView::~SearchResultAnswerCardView() {
-  model_->RemoveObserver(this);
-}
-
-const char* SearchResultAnswerCardView::GetClassName() const {
-  return "SearchResultAnswerCardView";
-}
-
-void SearchResultAnswerCardView::OnContainerSelected(
-    bool from_bottom,
-    bool directional_movement) {
-  if (num_results() == 0)
-    return;
-
-  SetSelectedIndex(0);
-}
-
-int SearchResultAnswerCardView::GetYSize() {
-  return num_results();
-}
-
-int SearchResultAnswerCardView::DoUpdate() {
-  const bool have_result = search_answer_container_view_->visible();
-  set_container_score(have_result ? kSearchAnswerCardRelevance : 0);
-  return have_result ? 1 : 0;
-}
-
-void SearchResultAnswerCardView::UpdateSelectedIndex(int old_selected,
-                                                     int new_selected) {
-  if (new_selected == old_selected)
-    return;
-
-  const bool is_selected = new_selected == 0;
-  search_answer_container_view_->SetSelected(is_selected);
-  if (is_selected)
-    NotifyAccessibilityEvent(ui::AX_EVENT_SELECTION, true);
-}
-
-void SearchResultAnswerCardView::OnSearchAnswerAvailableChanged(
-    bool has_answer) {
-  const bool visible = has_answer && !features::IsAnswerCardDarkRunEnabled();
-  if (visible == search_answer_container_view_->visible())
-    return;
-
-  search_answer_container_view_->SetVisible(visible);
-  ScheduleUpdate();
-}
-
-}  // namespace app_list