Merge 244355 "Add CF_HDROP path for dragging on Win Aura"

content/browser/web_contents/web_contents_view_aura.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 "content/browser/web_contents/web_contents_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/command_line.h"
+#include "base/file_util.h"
 #include "base/metrics/histogram.h"
 #include "base/strings/utf_string_conversions.h"
+#include "content/browser/download/drag_download_util.h"
 #include "content/browser/frame_host/interstitial_page_impl.h"
 #include "content/browser/frame_host/navigation_entry_impl.h"
 #include "content/browser/renderer_host/dip_util.h"
 #include "content/browser/renderer_host/overscroll_controller.h"
 #include "content/browser/renderer_host/render_view_host_factory.h"
 #include "content/browser/renderer_host/render_view_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_impl.h"
 #include "content/browser/renderer_host/render_widget_host_view_aura.h"
 #include "content/browser/web_contents/aura/image_window_delegate.h"
 #include "content/browser/web_contents/aura/shadow_layer_delegate.h"
 #include "content/browser/web_contents/aura/window_slider.h"
 #include "content/browser/web_contents/touch_editable_impl_aura.h"
 #include "content/browser/web_contents/web_contents_impl.h"
+#include "content/public/browser/content_browser_client.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/overscroll_configuration.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/render_widget_host.h"
 #include "content/public/browser/render_widget_host_view.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/browser/web_contents_observer.h"
 #include "content/public/browser/web_contents_view_delegate.h"
 #include "content/public/browser/web_drag_dest_delegate.h"
+#include "content/public/common/content_client.h"
 #include "content/public/common/content_switches.h"
 #include "content/public/common/drop_data.h"
 #include "net/base/net_util.h"
 #include "third_party/WebKit/public/web/WebInputEvent.h"
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/client/drag_drop_client.h"
 #include "ui/aura/client/drag_drop_delegate.h"
 #include "ui/aura/client/window_tree_client.h"
 #include "ui/aura/env.h"
 #include "ui/aura/root_window.h"
@@ skipping 203 matching lines @@
   // Images without ALT text will only have a file extension so we need to
   // synthesize one from the provided extension and URL.
   if (file_name.BaseName().RemoveExtension().empty()) {
     const string16 extension = file_name.Extension();
     // Retrieve the name from the URL.
     file_name = base::FilePath(net::GetSuggestedFilename(
         drop_data.url, "", "", "", "", "")).ReplaceExtension(extension);
   }
   provider->SetFileContents(file_name, drop_data.file_contents);
 }
+
+void PrepareDragForDownload(
+    const DropData& drop_data,
+    ui::OSExchangeData::Provider* provider,
+    WebContentsImpl* web_contents) {
+  const GURL& page_url = web_contents->GetLastCommittedURL();
+  const std::string& page_encoding = web_contents->GetEncoding();
+
+  // Parse the download metadata.
+  base::string16 mime_type;
+  base::FilePath file_name;
+  GURL download_url;
+  if (!ParseDownloadMetadata(drop_data.download_metadata,
+                             &mime_type,
+                             &file_name,
+                             &download_url))
+    return;
+
+  // Generate the file name based on both mime type and proposed file name.
+  std::string default_name =
+      GetContentClient()->browser()->GetDefaultDownloadName();
+  base::FilePath generated_download_file_name =
+      net::GenerateFileName(download_url,
+                            std::string(),
+                            std::string(),
+                            base::UTF16ToUTF8(file_name.value()),
+                            base::UTF16ToUTF8(mime_type),
+                            default_name);
+
+  // http://crbug.com/332579
+  base::ThreadRestrictions::ScopedAllowIO allow_file_operations;
+
+  base::FilePath temp_dir_path;
+  if (!file_util::CreateNewTempDirectory(FILE_PATH_LITERAL("chrome_drag"),
+                                         &temp_dir_path))
+    return;
+
+  base::FilePath download_path =
+      temp_dir_path.Append(generated_download_file_name);
+
+  // We cannot know when the target application will be done using the temporary
+  // file, so schedule it to be deleted after rebooting.
+  base::DeleteFileAfterReboot(download_path);
+  base::DeleteFileAfterReboot(temp_dir_path);
+
+  // Provide the data as file (CF_HDROP). A temporary download file with the
+  // Zone.Identifier ADS (Alternate Data Stream) attached will be created.
+  scoped_refptr<DragDownloadFile> download_file =
+      new DragDownloadFile(
+          download_path,
+          scoped_ptr<net::FileStream>(),
+          download_url,
+          Referrer(page_url, drop_data.referrer_policy),
+          page_encoding,
+          web_contents);
+  ui::OSExchangeData::DownloadFileInfo file_download(base::FilePath(),
+                                                     download_file.get());
+  provider->SetDownloadFileInfo(file_download);
+}
 #endif
 
 // Utility to fill a ui::OSExchangeDataProvider object from DropData.
 void PrepareDragData(const DropData& drop_data,
-                     ui::OSExchangeData::Provider* provider) {
+                     ui::OSExchangeData::Provider* provider,
+                     WebContentsImpl* web_contents) {
 #if defined(OS_WIN)
+  // Put download before file contents to prefer the download of a image over
+  // its thumbnail link.
+  if (!drop_data.download_metadata.empty())
+    PrepareDragForDownload(drop_data, provider, web_contents);
   // We set the file contents before the URL because the URL also sets file
   // contents (to a .URL shortcut).  We want to prefer file content data over
   // a shortcut so we add it first.
   if (!drop_data.file_contents.empty())
     PrepareDragForFileContents(drop_data, provider);
 #endif
   if (!drop_data.text.string().empty())
     provider->SetString(drop_data.text.string());
   if (drop_data.url.is_valid())
     provider->SetURL(drop_data.url, drop_data.url_title);
@@ skipping 1081 matching lines @@
   aura::Window* root_window = GetNativeView()->GetRootWindow();
   if (!aura::client::GetDragDropClient(root_window)) {
     web_contents_->SystemDragEnded();
     return;
   }
 
   if (touch_editable_)
     touch_editable_->EndTouchEditing();
 
   ui::OSExchangeData::Provider* provider = ui::OSExchangeData::CreateProvider();
-  PrepareDragData(drop_data, provider);
+  PrepareDragData(drop_data, provider, web_contents_);
 
   ui::OSExchangeData data(provider);  // takes ownership of |provider|.
 
   if (!image.isNull()) {
     drag_utils::SetDragImageOnDataObject(image,
         gfx::Size(image.width(), image.height()), image_offset, &data);
   }
 
   scoped_ptr<WebDragSourceAura> drag_source(
       new WebDragSourceAura(GetNativeView(), web_contents_));
@@ skipping 340 matching lines @@
       event.location(),
       gfx::Screen::GetScreenFor(GetNativeView())->GetCursorScreenPoint(),
       ConvertAuraEventFlagsToWebInputEventModifiers(event.flags()));
   if (drag_dest_delegate_)
     drag_dest_delegate_->OnDrop();
   current_drop_data_.reset();
   return current_drag_op_;
 }
 
 }  // namespace content