[Sharesheet] Example ShareAction

This CL adds a single example of a ShareAction for
testing the content previews feature on Chrome
OS devices.

Bug: 1159279
Change-Id: Ia8e0e5dfbc00ab664468667363ece01f4b71ad1d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2592276Reviewed-by: Melissa Zhang <melzhang@chromium.org>
Commit-Queue: Angela Gyi <angelagyi@google.com>
Cr-Commit-Position: refs/heads/master@{#840058}

chrome/browser/BUILD.gn

@@ -1607,6 +1607,8 @@ static_library("browser") {
     "sessions/session_tab_helper_factory.h",
     "sessions/tab_restore_service_factory.cc",
     "sessions/tab_restore_service_factory.h",
+    "sharesheet/example_action.cc",
+    "sharesheet/example_action.h",
     "sharesheet/share_action.cc",
     "sharesheet/share_action.h",
     "sharesheet/sharesheet_action_cache.cc",

chrome/browser/sharesheet/example_action.cc

+// Copyright 2020 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 "chrome/browser/sharesheet/example_action.h"
+#include "base/strings/utf_string_conversions.h"
+#include "chrome/app/vector_icons/vector_icons.h"
+#include "chrome/browser/sharesheet/sharesheet_types.h"
+#include "components/services/app_service/public/mojom/types.mojom.h"
+
+ExampleAction::ExampleAction() {
+  name_ = "example";
+}
+
+ExampleAction::~ExampleAction() = default;
+
+const base::string16 ExampleAction::GetActionName() {
+  return base::ASCIIToUTF16(name_);
+}
+
+const gfx::VectorIcon& ExampleAction::GetActionIcon() {
+  return kAddIcon;
+}
+
+void ExampleAction::LaunchAction(sharesheet::SharesheetController* controller,
+                                 views::View* root_view,
+                                 apps::mojom::IntentPtr intent) {
+  LOG(ERROR) << "ExampleAction launches.";
+  controller_ = controller;
+  controller_->CloseSharesheet();
+}
+
+void ExampleAction::OnClosing(sharesheet::SharesheetController* controller) {
+  LOG(ERROR) << "ExampleAction knows it needs to spin down now.";
+  controller_ = nullptr;
+}

chrome/browser/sharesheet/example_action.h

+// Copyright 2020 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 CHROME_BROWSER_SHARESHEET_EXAMPLE_ACTION_H_
+#define CHROME_BROWSER_SHARESHEET_EXAMPLE_ACTION_H_
+
+#include "chrome/browser/sharesheet/share_action.h"
+
+class ExampleAction : public sharesheet::ShareAction {
+ public:
+  ExampleAction();
+  ~ExampleAction() override;
+  ExampleAction(const ExampleAction&) = delete;
+  ExampleAction& operator=(const ExampleAction&) = delete;
+
+  const base::string16 GetActionName() override;
+  const gfx::VectorIcon& GetActionIcon() override;
+  void LaunchAction(sharesheet::SharesheetController* controller,
+                    views::View* root_view,
+                    apps::mojom::IntentPtr intent) override;
+  void OnClosing(sharesheet::SharesheetController* controller) override;
+
+ private:
+  sharesheet::SharesheetController* controller_ = nullptr;
+  std::string name_;
+};
+
+#endif  // CHROME_BROWSER_SHARESHEET_EXAMPLE_ACTION_H_

chrome/browser/sharesheet/sharesheet_action_cache.cc

@@ -5,8 +5,11 @@
 #include "chrome/browser/sharesheet/sharesheet_action_cache.h"
 
 #include "build/chromeos_buildflags.h"
+#include "chrome/browser/about_flags.h"
+#include "chrome/browser/sharesheet/example_action.h"
 #include "chrome/browser/sharesheet/share_action.h"
 #include "chrome/browser/sharesheet/sharesheet_types.h"
+#include "chrome/common/chrome_features.h"
 #include "ui/gfx/vector_icon_types.h"
 
 #if BUILDFLAG(IS_CHROMEOS_ASH)
@@ -24,6 +27,19 @@ SharesheetActionCache::SharesheetActionCache() {
     AddShareAction(std::make_unique<NearbyShareAction>());
   }
   AddShareAction(std::make_unique<DriveShareAction>());
+  // Add 9 example actions to show expanded view
+  if (base::FeatureList::IsEnabled(features::kSharesheetContentPreviews)) {
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+    AddShareAction(std::make_unique<ExampleAction>());
+  }
 #endif
 }