SearchBoxView now enables/disables cursor based on user interaction.

ui/app_list/views/search_box_view.cc

 // Copyright (c) 2012 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_box_view.h"
 
 #include <algorithm>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
@@ skipping 44 matching lines @@
 constexpr int kBackgroundBorderCornerRadius = 2;
 constexpr int kBackgroundBorderCornerRadiusFullscreen = 24;
 constexpr int kGoogleIconSize = 24;
 constexpr int kMicIconSize = 24;
 
 // Default color used when wallpaper customized color is not available for
 // searchbox, #000 at 87% opacity.
 constexpr SkColor kDefaultSearchboxColor =
     SkColorSetARGBMacro(0xDE, 0x00, 0x00, 0x00);
 
+// Color of placeholder text in zero query state.
+constexpr SkColor kZeroQuerySearchboxColor =
+    SkColorSetARGBMacro(0x8A, 0x00, 0x00, 0x00);
+
 // A background that paints a solid white rounded rect with a thin grey border.
 class SearchBoxBackground : public views::Background {
  public:
   SearchBoxBackground()
       : background_border_corner_radius_(
             features::IsFullscreenAppListEnabled()
                 ? kBackgroundBorderCornerRadiusFullscreen
                 : kBackgroundBorderCornerRadius) {}
   ~SearchBoxBackground() override {}
 
@@ skipping 100 matching lines @@
   if (is_fullscreen_app_list_enabled_) {
     google_icon_ = new views::ImageView();
     google_icon_->SetImage(gfx::CreateVectorIcon(
         kIcGoogleBlackIcon, kGoogleIconSize, kDefaultSearchboxColor));
     content_container_->AddChildView(google_icon_);
 
     search_box_->set_placeholder_text_color(kDefaultSearchboxColor);
     search_box_->set_placeholder_text_draw_flags(
         gfx::Canvas::TEXT_ALIGN_CENTER);
     search_box_->SetFontList(search_box_->GetFontList().DeriveWithSizeDelta(2));
+    search_box_->SetCursorEnabled(is_search_box_active_);
   } else {
     back_button_ = new SearchBoxImageButton(this);
     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
     back_button_->SetImage(
         views::ImageButton::STATE_NORMAL,
         rb.GetImageSkiaNamed(IDR_APP_LIST_FOLDER_BACK_NORMAL));
     back_button_->SetImageAlignment(views::ImageButton::ALIGN_CENTER,
                                     views::ImageButton::ALIGN_MIDDLE);
     SetBackButtonLabel(false);
     content_container_->AddChildView(back_button_);
@@ skipping 27 matching lines @@
   return !search_box_->text().empty();
 }
 
 void SearchBoxView::ClearSearch() {
   search_box_->SetText(base::string16());
   view_delegate_->AutoLaunchCanceled();
   // Updates model and fires query changed manually because SetText() above
   // does not generate ContentsChanged() notification.
   UpdateModel();
   NotifyQueryChanged();
+  if (is_fullscreen_app_list_enabled_) {
+    SetSearchBoxActive(!search_box_->text().empty());
+    if (app_list_view_)
+      app_list_view_->SetStateFromSearchBoxView(search_box_->text().empty());
+  }
 }
 
 void SearchBoxView::SetShadow(const gfx::ShadowValue& shadow) {
   if (is_fullscreen_app_list_enabled_)
     return;
 
   SetBorder(base::MakeUnique<views::ShadowBorder>(shadow));
   Layout();
 }
 
@@ skipping 83 matching lines @@
   if (!back_button_)
     return;
 
   base::string16 back_button_label(l10n_util::GetStringUTF16(
       folder ? IDS_APP_LIST_FOLDER_CLOSE_FOLDER_ACCESSIBILE_NAME
              : IDS_APP_LIST_BACK));
   back_button_->SetAccessibleName(back_button_label);
   back_button_->SetTooltipText(back_button_label);
 }
 
+void SearchBoxView::SetSearchBoxActive(bool active) {

[vadimt, 2017/06/24 00:31:17]

Early return if active == is_search_box_active_, otherwise, the concern is that
SchedulePaint will cause if not blinking, then perf problems.

[newcomer, 2017/06/27 22:12:49]

Done.

+  search_box_->set_placeholder_text_draw_flags(
+      active ? gfx::Canvas::TEXT_ALIGN_LEFT : gfx::Canvas::TEXT_ALIGN_CENTER);
+  search_box_->set_placeholder_text_color(active ? kZeroQuerySearchboxColor
+                                                 : kDefaultSearchboxColor);
+  is_search_box_active_ = active;
+  search_box_->SetCursorEnabled(active);
+  search_box_->SchedulePaint();
+}
+
 bool SearchBoxView::OnMouseWheel(const ui::MouseWheelEvent& event) {
   if (contents_view_)
     return contents_view_->OnMouseWheel(event);
 
   return false;
 }
 
 void SearchBoxView::OnEnabledChanged() {
   search_box_->SetEnabled(enabled());
   if (speech_button_)
     speech_button_->SetEnabled(enabled());
 }
 
 const char* SearchBoxView::GetClassName() const {
   return "SearchBoxView";
 }
 
+void SearchBoxView::OnGestureEvent(ui::GestureEvent* event) {
+  if (!is_fullscreen_app_list_enabled_ || event->type() != ui::ET_GESTURE_TAP)
+    return;
+
+  // If the search box is empty and the cursor is not enabled, enable the cursor
+  // and shift the placeholder text left.
+  if (search_box_->text().empty() && !is_search_box_active_)
+    SetSearchBoxActive(true);
+}
+
+void SearchBoxView::OnMouseEvent(ui::MouseEvent* event) {
+  if (!is_fullscreen_app_list_enabled_ || event->type() != ui::ET_MOUSE_PRESSED)
+    return;
+
+  // If the search box is empty and the cursor is not enabled, enable the cursor
+  // and shift the placeholder text left.
+  if (search_box_->text().empty() && !is_search_box_active_)
+    SetSearchBoxActive(true);
+}
+
 void SearchBoxView::UpdateModel() {
   // Temporarily remove from observer to ignore notifications caused by us.
   model_->search_box()->RemoveObserver(this);
   model_->search_box()->Update(search_box_->text(), false);
   model_->search_box()->SetSelectionModel(search_box_->GetSelectionModel());
   model_->search_box()->AddObserver(this);
 }
 
 void SearchBoxView::NotifyQueryChanged() {
   DCHECK(delegate_);
   delegate_->QueryChanged(this);
 }
 
 void SearchBoxView::ContentsChanged(views::Textfield* sender,
                                     const base::string16& new_contents) {
   UpdateModel();
   view_delegate_->AutoLaunchCanceled();
   NotifyQueryChanged();
-  if (is_fullscreen_app_list_enabled_)
-    app_list_view_->SetStateFromSearchBoxView(search_box_->text().empty());
+  if (is_fullscreen_app_list_enabled_) {
+    SetSearchBoxActive(!search_box_->text().empty());
+    if (app_list_view_)
+      app_list_view_->SetStateFromSearchBoxView(search_box_->text().empty());
+  }
 }
 
 bool SearchBoxView::HandleKeyEvent(views::Textfield* sender,
                                    const ui::KeyEvent& key_event) {
   if (key_event.type() == ui::ET_KEY_PRESSED) {
     if (key_event.key_code() == ui::VKEY_TAB &&
         focused_view_ != FOCUS_CONTENTS_VIEW &&
         MoveTabFocus(key_event.IsShiftDown()))
       return true;
 
@@ skipping 33 matching lines @@
         speech_button_->OnKeyReleased(key_event))
       return true;
 
     return contents_view_ && contents_view_->visible() &&
            contents_view_->OnKeyReleased(key_event);
   }
 
   return false;
 }
 
+bool SearchBoxView::HandleMouseEvent(views::Textfield* sender,
+                                     const ui::MouseEvent& mouse_event) {
+  if (!is_fullscreen_app_list_enabled_)
+    return false;
+
+  if (search_box_->text().empty() && !is_search_box_active_)
+    SetSearchBoxActive(true);
+
+  return true;
+}
+
+bool SearchBoxView::HandleGestureEvent(views::Textfield* sender,
+                                       const ui::GestureEvent& gesture_event) {
+  if (!is_fullscreen_app_list_enabled_)
+    return false;
+
+  if (search_box_->text().empty() && !is_search_box_active_) {
+    SetSearchBoxActive(true);
+    return true;
+  } else {
+    return false;
+  }
+}
+
 void SearchBoxView::ButtonPressed(views::Button* sender,
                                   const ui::Event& event) {
   if (back_button_ && sender == back_button_)
     delegate_->BackButtonPressed();
   else if (speech_button_ && sender == speech_button_)
     view_delegate_->StartSpeechRecognition();
   else
     NOTREACHED();
 }
 
@@ skipping 54 matching lines @@
   NotifyQueryChanged();
 }
 
 void SearchBoxView::OnSpeechRecognitionStateChanged(
     SpeechRecognitionState new_state) {
   SpeechRecognitionButtonPropChanged();
   SchedulePaint();
 }
 
 }  // namespace app_list