Add WebDragData to blink::WebView::dragtargetDrop

content/browser/renderer_host/render_view_host_impl.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/renderer_host/render_view_host_impl.h"
 
 #include <set>
 #include <string>
 #include <utility>
 #include <vector>
@@ skipping 62 matching lines @@
 #include "content/public/common/file_chooser_file_info.h"
 #include "content/public/common/file_chooser_params.h"
 #include "content/public/common/result_codes.h"
 #include "content/public/common/url_constants.h"
 #include "content/public/common/url_utils.h"
 #include "net/base/filename_util.h"
 #include "net/base/url_util.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "storage/browser/fileapi/isolated_context.h"
 #include "third_party/skia/include/core/SkBitmap.h"
+#include "ui/base/clipboard/clipboard.h"
 #include "ui/base/touch/touch_device.h"
 #include "ui/base/touch/touch_enabled.h"
 #include "ui/base/ui_base_switches.h"
 #include "ui/gfx/animation/animation.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/native_widget_types.h"
 #include "ui/native_theme/native_theme_switches.h"
 #include "url/url_constants.h"
 
 #if defined(OS_WIN)
@@ skipping 64 matching lines @@
       display::win::GetSystemMetricsInDIP(SM_CXVSCROLL);
   prefs->horizontal_scroll_bar_height_in_dips =
       display::win::GetSystemMetricsInDIP(SM_CYHSCROLL);
   prefs->arrow_bitmap_height_vertical_scroll_bar_in_dips =
       display::win::GetSystemMetricsInDIP(SM_CYVSCROLL);
   prefs->arrow_bitmap_width_horizontal_scroll_bar_in_dips =
       display::win::GetSystemMetricsInDIP(SM_CXHSCROLL);
 }
 #endif
 
+std::vector<DropData::MetaData> DropDataToMetaData(const DropData& drop_data) {
+  std::vector<DropData::MetaData> meta_data;
+  if (!drop_data.text.is_null()) {
+    meta_data.emplace_back(DropData::Kind::STRING,
+                           base::ASCIIToUTF16(ui::Clipboard::kMimeTypeText));
+  }
+
+  if (!drop_data.url.is_empty()) {
+    meta_data.emplace_back(DropData::Kind::STRING,
+                           base::ASCIIToUTF16(ui::Clipboard::kMimeTypeURIList));
+  }
+
+  if (!drop_data.html.is_null()) {
+    meta_data.emplace_back(DropData::Kind::STRING,
+                           base::ASCIIToUTF16(ui::Clipboard::kMimeTypeHTML));
+  }
+
+  // On Aura, filenames are available before drop.
+  for (const auto& file_info : drop_data.filenames) {
+    if (!file_info.path.empty()) {
+      meta_data.emplace_back(DropData::Kind::FILENAME, file_info.path);
+    }
+  }
+
+  // On Android, only files' mime types are available before drop.
+  for (const auto& mime_type : drop_data.file_mime_types) {
+    if (!mime_type.empty()) {
+      meta_data.emplace_back(DropData::Kind::FILENAME, mime_type);
+    }
+  }
+
+  for (const auto& file_system_file : drop_data.file_system_files) {
+    if (!file_system_file.url.is_empty()) {
+      meta_data.emplace_back(DropData::Kind::FILESYSTEMFILE,
+                             file_system_file.url);
+    }
+  }
+
+  for (const auto& custom_data_item : drop_data.custom_data) {
+    meta_data.emplace_back(DropData::Kind::STRING, custom_data_item.first);
+  }
+
+  return meta_data;
+}
+
 }  // namespace
 
 // static
 const int64_t RenderViewHostImpl::kUnloadTimeoutMS = 1000;
 
 ///////////////////////////////////////////////////////////////////////////////
 // RenderViewHost, public:
 
 // static
 RenderViewHost* RenderViewHost::FromID(int render_process_id,
@@ skipping 407 matching lines @@
   GetWidget()->RendererExited(status, exit_code);
   delegate_->RenderViewTerminated(this, status, exit_code);
 }
 
 void RenderViewHostImpl::DragTargetDragEnter(
     const DropData& drop_data,
     const gfx::Point& client_pt,
     const gfx::Point& screen_pt,
     WebDragOperationsMask operations_allowed,
     int key_modifiers) {
-  const int renderer_id = GetProcess()->GetID();
-  ChildProcessSecurityPolicyImpl* policy =
-      ChildProcessSecurityPolicyImpl::GetInstance();
+  DropData filtered_data(drop_data);
+  FilterDropData(&filtered_data);

[dcheng, 2016/05/10 07:29:08]

Since we extracted this to a separate function, I think it would look nicer to
write:

DropData filtered_data = FilterDropData(drop_data);

[hush (inactive), 2016/05/10 21:18:32]

Done.

 
-#if defined(OS_CHROMEOS)
-  // The externalfile:// scheme is used in Chrome OS to open external files in a
-  // browser tab.
-  if (drop_data.url.SchemeIs(content::kExternalFileScheme))
-    policy->GrantRequestURL(renderer_id, drop_data.url);
-#endif
-
-  // The URL could have been cobbled together from any highlighted text string,
-  // and can't be interpreted as a capability.
-  DropData filtered_data(drop_data);
-  GetProcess()->FilterURL(true, &filtered_data.url);
-  if (drop_data.did_originate_from_renderer) {
-    filtered_data.filenames.clear();
-  }
-
-  // The filenames vector, on the other hand, does represent a capability to
-  // access the given files.
-  storage::IsolatedContext::FileInfoSet files;
-  for (std::vector<ui::FileInfo>::iterator iter(
-           filtered_data.filenames.begin());
-       iter != filtered_data.filenames.end();
-       ++iter) {
-    // A dragged file may wind up as the value of an input element, or it
-    // may be used as the target of a navigation instead.  We don't know
-    // which will happen at this point, so generously grant both access
-    // and request permissions to the specific file to cover both cases.
-    // We do not give it the permission to request all file:// URLs.
-
-    // Make sure we have the same display_name as the one we register.
-    if (iter->display_name.empty()) {
-      std::string name;
-      files.AddPath(iter->path, &name);
-      iter->display_name = base::FilePath::FromUTF8Unsafe(name);
-    } else {
-      files.AddPathWithName(iter->path, iter->display_name.AsUTF8Unsafe());
-    }
-
-    policy->GrantRequestSpecificFileURL(renderer_id,
-                                        net::FilePathToFileURL(iter->path));
-
-    // If the renderer already has permission to read these paths, we don't need
-    // to re-grant them. This prevents problems with DnD for files in the CrOS
-    // file manager--the file manager already had read/write access to those
-    // directories, but dragging a file would cause the read/write access to be
-    // overwritten with read-only access, making them impossible to delete or
-    // rename until the renderer was killed.
-    if (!policy->CanReadFile(renderer_id, iter->path))
-      policy->GrantReadFile(renderer_id, iter->path);
-  }
-
-  storage::IsolatedContext* isolated_context =
-      storage::IsolatedContext::GetInstance();
-  DCHECK(isolated_context);
-  std::string filesystem_id = isolated_context->RegisterDraggedFileSystem(
-      files);
-  if (!filesystem_id.empty()) {
-    // Grant the permission iff the ID is valid.
-    policy->GrantReadFileSystem(renderer_id, filesystem_id);
-  }
-  filtered_data.filesystem_id = base::UTF8ToUTF16(filesystem_id);
-
-  storage::FileSystemContext* file_system_context =
-      BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
-                                          GetSiteInstance())
-          ->GetFileSystemContext();
-  for (size_t i = 0; i < filtered_data.file_system_files.size(); ++i) {
-    storage::FileSystemURL file_system_url =
-        file_system_context->CrackURL(filtered_data.file_system_files[i].url);
-
-    std::string register_name;
-    std::string filesystem_id = isolated_context->RegisterFileSystemForPath(
-        file_system_url.type(), file_system_url.filesystem_id(),
-        file_system_url.path(), &register_name);
-    policy->GrantReadFileSystem(renderer_id, filesystem_id);
-
-    // Note: We are using the origin URL provided by the sender here. It may be
-    // different from the receiver's.
-    filtered_data.file_system_files[i].url =
-        GURL(storage::GetIsolatedFileSystemRootURIString(
-                 file_system_url.origin(), filesystem_id, std::string())
-                 .append(register_name));
-  }
-
-  Send(new DragMsg_TargetDragEnter(GetRoutingID(), filtered_data, client_pt,
-                                   screen_pt, operations_allowed,
-                                   key_modifiers));
+  Send(new DragMsg_TargetDragEnter(
+      GetRoutingID(), DropDataToMetaData(filtered_data), client_pt, screen_pt,
+      operations_allowed, key_modifiers));
 }
 
 void RenderViewHostImpl::DragTargetDragOver(
     const gfx::Point& client_pt,
     const gfx::Point& screen_pt,
     WebDragOperationsMask operations_allowed,
     int key_modifiers) {
   Send(new DragMsg_TargetDragOver(GetRoutingID(), client_pt, screen_pt,
                                   operations_allowed, key_modifiers));
 }
 
 void RenderViewHostImpl::DragTargetDragLeave() {
   Send(new DragMsg_TargetDragLeave(GetRoutingID()));
 }
 
-void RenderViewHostImpl::DragTargetDrop(
-    const gfx::Point& client_pt,
-    const gfx::Point& screen_pt,
-    int key_modifiers) {
-  Send(new DragMsg_TargetDrop(GetRoutingID(), client_pt, screen_pt,
+void RenderViewHostImpl::DragTargetDrop(const DropData& drop_data,
+                                        const gfx::Point& client_pt,
+                                        const gfx::Point& screen_pt,
+                                        int key_modifiers) {
+  GrantPermissionsToDraggedFiles(drop_data);
+  Send(new DragMsg_TargetDrop(GetRoutingID(), drop_data, client_pt, screen_pt,
                               key_modifiers));
 }
 
 void RenderViewHostImpl::DragSourceEndedAt(
     int client_x, int client_y, int screen_x, int screen_y,
     WebDragOperation operation) {
   Send(new DragMsg_SourceEnded(GetRoutingID(),
                                gfx::Point(client_x, client_y),
                                gfx::Point(screen_x, screen_y),
                                operation));
@@ skipping 634 matching lines @@
                    weak_factory_.GetWeakPtr()));
   } else {
     render_view_ready_on_process_launch_ = true;
   }
 }
 
 void RenderViewHostImpl::RenderViewReady() {
   delegate_->RenderViewReady(this);
 }
 
+void RenderViewHostImpl::FilterDropData(DropData* filtered_data) {
+  // The URL could have been cobbled together from any highlighted text string,
+  // and can't be interpreted as a capability.
+  GetProcess()->FilterURL(true, &filtered_data->url);
+  if (filtered_data->did_originate_from_renderer) {
+    filtered_data->filenames.clear();
+  }
+
+  // The filenames vector, on the other hand, does represent a capability to
+  // access the given files.
+  storage::IsolatedContext::FileInfoSet files;
+  for (auto& filename : filtered_data->filenames) {
+    // Make sure we have the same display_name as the one we register.
+    if (filename.display_name.empty()) {
+      std::string name;
+      files.AddPath(filename.path, &name);
+      filename.display_name = base::FilePath::FromUTF8Unsafe(name);
+    } else {
+      files.AddPathWithName(filename.path,
+                            filename.display_name.AsUTF8Unsafe());
+    }
+  }
+
+  storage::IsolatedContext* isolated_context =
+      storage::IsolatedContext::GetInstance();
+  DCHECK(isolated_context);
+  std::string filesystem_id =
+      isolated_context->RegisterDraggedFileSystem(files);
+  if (!filesystem_id.empty()) {
+    // Grant the permission iff the ID is valid.
+    filesystem_ids_to_grant_permissions_.push_back(filesystem_id);
+  }
+  filtered_data->filesystem_id = base::UTF8ToUTF16(filesystem_id);
+
+  storage::FileSystemContext* file_system_context =
+      BrowserContext::GetStoragePartition(GetProcess()->GetBrowserContext(),
+                                          GetSiteInstance())
+          ->GetFileSystemContext();
+  for (auto& file_system_file : filtered_data->file_system_files) {
+    storage::FileSystemURL file_system_url =
+        file_system_context->CrackURL(file_system_file.url);
+
+    std::string register_name;
+    std::string filesystem_id = isolated_context->RegisterFileSystemForPath(
+        file_system_url.type(), file_system_url.filesystem_id(),
+        file_system_url.path(), &register_name);
+
+    if (!filesystem_id.empty()) {
+      // Grant the permission iff the ID is valid.
+      filesystem_ids_to_grant_permissions_.push_back(filesystem_id);
+    }
+
+    // Note: We are using the origin URL provided by the sender here. It may be
+    // different from the receiver's.
+    file_system_file.url =
+        GURL(storage::GetIsolatedFileSystemRootURIString(
+                 file_system_url.origin(), filesystem_id, std::string())
+                 .append(register_name));
+  }
+}
+
+void RenderViewHostImpl::GrantPermissionsToDraggedFiles(
+    const DropData& drop_data) {
+  const int renderer_id = GetProcess()->GetID();
+  ChildProcessSecurityPolicyImpl* policy =
+      ChildProcessSecurityPolicyImpl::GetInstance();
+
+#if defined(OS_CHROMEOS)
+  // The externalfile:// scheme is used in Chrome OS to open external files in a
+  // browser tab.
+  if (drop_data.url.SchemeIs(content::kExternalFileScheme))
+    policy->GrantRequestURL(renderer_id, drop_data.url);
+#endif
+
+  for (const auto& filename : drop_data.filenames) {
+    // A dragged file may wind up as the value of an input element, or it
+    // may be used as the target of a navigation instead.  We don't know
+    // which will happen at this point, so generously grant both access
+    // and request permissions to the specific file to cover both cases.
+    // We do not give it the permission to request all file:// URLs.
+    policy->GrantRequestSpecificFileURL(renderer_id,
+                                        net::FilePathToFileURL(filename.path));
+
+    // If the renderer already has permission to read these paths, we don't need
+    // to re-grant them. This prevents problems with DnD for files in the CrOS
+    // file manager--the file manager already had read/write access to those
+    // directories, but dragging a file would cause the read/write access to be
+    // overwritten with read-only access, making them impossible to delete or
+    // rename until the renderer was killed.
+    if (!policy->CanReadFile(renderer_id, filename.path))
+      policy->GrantReadFile(renderer_id, filename.path);
+  }
+
+  for (const auto& filesystem_id : filesystem_ids_to_grant_permissions_) {
+    policy->GrantReadFileSystem(renderer_id, filesystem_id);
+  }
+
+  filesystem_ids_to_grant_permissions_.clear();
+}
+
 }  // namespace content