Implement chrome.downloads.drag()

chrome/browser/extensions/api/downloads/downloads_api.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 "chrome/browser/extensions/api/downloads/downloads_api.h"
 
 #include <algorithm>
 #include <cctype>
 #include <iterator>
 #include <set>
@@ skipping 14 matching lines @@
 #include "base/stringprintf.h"
 #include "base/values.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/download/download_file_icon_extractor.h"
 #include "chrome/browser/download/download_query.h"
 #include "chrome/browser/download/download_service.h"
 #include "chrome/browser/download/download_service_factory.h"
 #include "chrome/browser/download/download_util.h"
 #include "chrome/browser/extensions/event_names.h"
 #include "chrome/browser/extensions/event_router.h"
+#include "chrome/browser/extensions/extension_function_dispatcher.h"
 #include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/icon_loader.h"
 #include "chrome/browser/icon_manager.h"
 #include "chrome/browser/renderer_host/chrome_render_message_filter.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/webui/web_ui_util.h"
 #include "chrome/common/cancelable_task_tracker.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/extensions/api/downloads.h"
 #include "content/public/browser/download_interrupt_reasons.h"
 #include "content/public/browser/download_item.h"
 #include "content/public/browser/download_save_info.h"
 #include "content/public/browser/download_url_parameters.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/render_process_host.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/resource_context.h"
 #include "content/public/browser/resource_dispatcher_host.h"
+#include "content/public/browser/web_contents.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_util.h"
 #include "net/url_request/url_request.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 
 using content::BrowserContext;
 using content::BrowserThread;
 using content::DownloadId;
 using content::DownloadItem;
 using content::DownloadManager;
@@ skipping 780 matching lines @@
   return true;
 }
 
 DownloadsDragFunction::DownloadsDragFunction() {}
 DownloadsDragFunction::~DownloadsDragFunction() {}
 
 bool DownloadsDragFunction::RunImpl() {
   scoped_ptr<extensions::api::downloads::Drag::Params> params(
       extensions::api::downloads::Drag::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params.get());
-  error_ = download_extension_errors::kNotImplementedError;
-  if (error_.empty())
-    RecordApiFunctions(DOWNLOADS_FUNCTION_DRAG);
-  return error_.empty();
+  DownloadItem* download_item = GetDownload(
+      profile(), include_incognito(), params->download_id);
+  content::WebContents* web_contents =
+      dispatcher()->delegate()->GetAssociatedWebContents();
+  if (!download_item || !web_contents) {
+    error_ = download_extension_errors::kInvalidOperationError;
+    return false;
+  }
+  RecordApiFunctions(DOWNLOADS_FUNCTION_DRAG);
+  gfx::Image* icon = g_browser_process->icon_manager()->LookupIcon(
+      download_item->GetUserVerifiedFilePath(), IconLoader::NORMAL);
+  gfx::NativeView view = web_contents->GetNativeView();
+  {
+    // Enable nested tasks during DnD, while |DragDownload()| blocks.
+    MessageLoop::ScopedNestableTaskAllower allow(MessageLoop::current());
+    download_util::DragDownload(download_item, icon, view);
+  }
+  return true;
 }
 
 DownloadsGetFileIconFunction::DownloadsGetFileIconFunction()
     : icon_extractor_(new DownloadFileIconExtractorImpl()) {
 }
 
 DownloadsGetFileIconFunction::~DownloadsGetFileIconFunction() {}
 
 void DownloadsGetFileIconFunction::SetIconExtractorForTesting(
     DownloadFileIconExtractor* extractor) {
@@ skipping 155 matching lines @@
   if (profile_->HasOffTheRecordProfile() &&
       !profile_->IsOffTheRecord()) {
     DispatchEventInternal(
         profile_->GetOffTheRecordProfile(),
         event_name,
         json_args,
         scoped_ptr<base::ListValue>(args->DeepCopy()));
   }
   DispatchEventInternal(profile_, event_name, json_args, args.Pass());
 }