Move Windows Jump List boilerplate out of jumplist_win for reuse

chrome/browser/jumplist_updater_win.cc

Index: chrome/browser/jumplist_updater_win.cc
diff --git a/chrome/browser/jumplist_updater_win.cc b/chrome/browser/jumplist_updater_win.cc
new file mode 100644
index 0000000000000000000000000000000000000000..96ccddb8e81d5af4836e24645d4dbafe62b7d385
--- /dev/null
+++ b/chrome/browser/jumplist_updater_win.cc
@@ -0,0 +1,232 @@
+// Copyright 2014 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/jumplist_updater_win.h"
+
+#include <windows.h>
+#include <propkey.h>
+#include <shobjidl.h>
+
+#include "base/path_service.h"
+#include "base/win/win_util.h"
+#include "base/win/windows_version.h"
+
+namespace {
+
+// Creates an IShellLink object.
+// An IShellLink object is almost the same as an application shortcut, and it
+// requires three items: the absolute path to an application, an argument
+// string, and a title string.
+bool AddShellLink(base::win::ScopedComPtr<IObjectCollection> collection,
+                  const std::wstring& application_path,
+                  scoped_refptr<ShellLinkItem> item) {
+  // Create an IShellLink object.
+  base::win::ScopedComPtr<IShellLink> link;
+  HRESULT result = link.CreateInstance(CLSID_ShellLink, NULL,
+                                       CLSCTX_INPROC_SERVER);
+  if (FAILED(result))
+    return false;
+
+  // Set the application path.
+  // We should exit this function when this call fails because it doesn't make
+  // any sense to add a shortcut that we cannot execute.
+  result = link->SetPath(application_path.c_str());
+  if (FAILED(result))
+    return false;
+
+  // Attach the command-line switches of this process before the given
+  // arguments and set it as the arguments of this IShellLink object.
+  // We also exit this function when this call fails because it isn't useful to
+  // add a shortcut that cannot open the given page.
+  std::wstring arguments(item->GetArguments());
+  if (!arguments.empty()) {
+    result = link->SetArguments(arguments.c_str());
+    if (FAILED(result))
+      return false;
+  }
+
+  // Attach the given icon path to this IShellLink object.
+  // Since an icon is an optional item for an IShellLink object, so we don't
+  // have to exit even when it fails.
+  if (!item->icon_path().empty())
+    link->SetIconLocation(item->icon_path().c_str(), item->icon_index());
+
+  // Set the title of the IShellLink object.
+  // The IShellLink interface does not have any functions which update its
+  // title because this interface is originally for creating an application
+  // shortcut which doesn't have titles.
+  // So, we should use the IPropertyStore interface to set its title.
+  base::win::ScopedComPtr<IPropertyStore> property_store;
+  result = link.QueryInterface(property_store.Receive());
+  if (FAILED(result))
+    return false;
+
+  if (!base::win::SetStringValueForPropertyStore(
+          property_store.get(),
+          PKEY_Title,
+          item->title().c_str())) {
+    return false;
+  }
+
+  // Add this IShellLink object to the given collection.
+  return SUCCEEDED(collection->AddObject(link));
+}
+
+}  // namespace
+
+
+// ShellLinkItem
+
+ShellLinkItem::ShellLinkItem()
+    : command_line_(CommandLine::NO_PROGRAM),
+      icon_index_(0) {
+}
+
+ShellLinkItem::~ShellLinkItem() {}
+
+std::wstring ShellLinkItem::GetArguments() const {
+  return command_line_.GetArgumentsString();
+}
+
+CommandLine* ShellLinkItem::GetCommandLine() {
+  return &command_line_;
+}
+
+
+// JumpListUpdater
+
+JumpListUpdater::JumpListUpdater(const std::wstring& app_user_model_id)
+    : app_user_model_id_(app_user_model_id),
+      user_max_items_(0) {
+  // Retrieve the absolute path to "chrome.exe".
+  PathService::Get(base::FILE_EXE, &application_path_);
+}
+
+JumpListUpdater::~JumpListUpdater() {
+}
+
+// static
+bool JumpListUpdater::IsEnabled() {
+  // JumpList is implemented only on Windows 7 or later.
+  return base::win::GetVersion() >= base::win::VERSION_WIN7;
+}
+
+bool JumpListUpdater::BeginUpdate() {
+  // This instance is expected to be one-time-use only.
+  DCHECK(!destination_list_.get());
+
+  // Check preconditions.
+  if (!JumpListUpdater::IsEnabled() || application_path_.empty() ||
+      app_user_model_id_.empty()) {
+    return false;
+  }
+
+  // Create an ICustomDestinationList object and attach it to our application.
+  HRESULT result = destination_list_.CreateInstance(CLSID_DestinationList, NULL,
+                                                    CLSCTX_INPROC_SERVER);
+  if (FAILED(result))
+    return false;
+
+  // Set the App ID for this JumpList.
+  result = destination_list_->SetAppID(app_user_model_id_.c_str());
+  if (FAILED(result))
+    return false;
+
+  // Start a transaction that updates the JumpList of this application.
+  // This implementation just replaces the all items in this JumpList, so
+  // we don't have to use the IObjectArray object returned from this call.
+  // It seems Windows 7 RC (Build 7100) automatically checks the items in this
+  // removed list and prevent us from adding the same item.
+  UINT max_slots;
+  base::win::ScopedComPtr<IObjectArray> removed;
+  result = destination_list_->BeginList(&max_slots, __uuidof(*removed),
+                                        removed.ReceiveVoid());
+  if (FAILED(result))
+    return false;
+
+  user_max_items_ = max_slots;
+
+  return true;
+}
+
+bool JumpListUpdater::CommitUpdate() {
+  if (!destination_list_.get())
+    return false;
+
+  // Commit this transaction and send the updated JumpList to Windows.
+  return SUCCEEDED(destination_list_->CommitList());
+}
+
+bool JumpListUpdater::AddTasks(const ShellLinkItemList& link_items) {
+  if (!destination_list_.get())
+    return false;
+
+  // Create an EnumerableObjectCollection object to be added items of the
+  // "Task" category.
+  base::win::ScopedComPtr<IObjectCollection> collection;
+  HRESULT result = collection.CreateInstance(CLSID_EnumerableObjectCollection,
+                                             NULL, CLSCTX_INPROC_SERVER);
+  if (FAILED(result))
+    return false;
+
+  // Add items to the "Task" category.
+  for (ShellLinkItemList::const_iterator it = link_items.begin();
+       it != link_items.end(); ++it) {
+    AddShellLink(collection, application_path_.value(), *it);
+  }
+
+  // We can now add the new list to the JumpList.
+  // ICustomDestinationList::AddUserTasks() also uses the IObjectArray
+  // interface to retrieve each item in the list. So, we retrieve the
+  // IObjectArray interface from the EnumerableObjectCollection object.
+  base::win::ScopedComPtr<IObjectArray> object_array;
+  result = collection.QueryInterface(object_array.Receive());
+  if (FAILED(result))
+    return false;
+
+  return SUCCEEDED(destination_list_->AddUserTasks(object_array));
+}
+
+bool JumpListUpdater::AddCustomCategory(const std::wstring& category_name,
+                                        const ShellLinkItemList& link_items,
+                                        size_t max_items) {
+ if (!destination_list_.get())
+    return false;
+
+  // Exit this function when the given vector does not contain any items
+  // because an ICustomDestinationList::AppendCategory() call fails in this
+  // case.
+  if (link_items.empty() || !max_items)
+    return true;
+
+  // Create an EnumerableObjectCollection object.
+  // We once add the given items to this collection object and add this
+  // collection to the JumpList.
+  base::win::ScopedComPtr<IObjectCollection> collection;
+  HRESULT result = collection.CreateInstance(CLSID_EnumerableObjectCollection,
+                                             NULL, CLSCTX_INPROC_SERVER);
+  if (FAILED(result))
+    return false;
+
+  for (ShellLinkItemList::const_iterator item = link_items.begin();
+       item != link_items.end() && max_items > 0; ++item, --max_items) {
+    scoped_refptr<ShellLinkItem> link(*item);
+    AddShellLink(collection, application_path_.value(), link);
+  }
+
+  // We can now add the new list to the JumpList.
+  // The ICustomDestinationList::AppendCategory() function needs the
+  // IObjectArray interface to retrieve each item in the list. So, we retrive
+  // the IObjectArray interface from the IEnumerableObjectCollection object
+  // and use it.
+  // It seems the ICustomDestinationList::AppendCategory() function just
+  // replaces all items in the given category with the ones in the new list.
+  base::win::ScopedComPtr<IObjectArray> object_array;
+  result = collection.QueryInterface(object_array.Receive());
+  if (FAILED(result))
+    return false;
+
+  return SUCCEEDED(destination_list_->AppendCategory(category_name.c_str(),
+                                                     object_array));
+}