Add WebDragData to blink::WebView::dragtargetDrop

content/renderer/render_view_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/renderer/render_view_impl.h"
 
 #include <algorithm>
 #include <cmath>
 #include <memory>
 
@@ skipping 408 matching lines @@
 
   bool HandleMouseLockedInputEvent(const blink::WebMouseEvent& event) override {
     // The WebWidget handles mouse lock in WebKit's handleInputEvent().
     return false;
   }
 
  private:
   blink::WebWidget* webwidget_;
 };
 
+WebDragData DropMetaDataToWebDragData(
+    const std::vector<DropData::MetaData>& drop_meta_data) {
+  std::vector<WebDragData::Item> item_list;
+  for (const auto& meta_data_item : drop_meta_data) {
+    if (meta_data_item.kind == DropData::Kind::STRING) {
+      WebDragData::Item item;
+      item.storageType = WebDragData::Item::StorageTypeString;
+      item.stringType = meta_data_item.mime_type;
+      item_list.push_back(item);
+      continue;
+    }
+
+    if (meta_data_item.kind == DropData::Kind::FILENAME) {
+      WebDragData::Item item;
+      item.storageType = WebDragData::Item::StorageTypeFilename;
+      item.filenameData = meta_data_item.filename.AsUTF16Unsafe();

[dcheng, 2016/05/10 07:29:09]

Do we need to update this to handle the mime-type only case?

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

We definitely have to. I haven't figured out all the details about how to handle
the dragging file case yet. But it seems like a blink plumbing is necessary, to
allow creating a File with just mime type. I will do this in a later CL for
handling files on Android. It won't be the immediate next step either. 

The next step would be dragging plain texts from an app to WebView/Chrome.

So... for now, I will just leave a to do here.

+      item_list.push_back(item);
+      continue;
+    }
+
+    if (meta_data_item.kind == DropData::Kind::FILESYSTEMFILE) {
+      WebDragData::Item item;
+      item.storageType = WebDragData::Item::StorageTypeFileSystemFile;
+      item.fileSystemURL = meta_data_item.file_system_url;
+      item_list.push_back(item);
+      continue;
+    }
+  }
+
+  WebDragData result;
+  result.initialize();
+  result.setItems(item_list);
+  return result;
+}
+
 WebDragData DropDataToWebDragData(const DropData& drop_data) {
   std::vector<WebDragData::Item> item_list;
 
   // These fields are currently unused when dragging into WebKit.
   DCHECK(drop_data.download_metadata.empty());
   DCHECK(drop_data.file_contents.empty());
   DCHECK(drop_data.file_description_filename.empty());
 
   if (!drop_data.text.is_null()) {
     WebDragData::Item item;
@@ skipping 2003 matching lines @@
 
   enabled_bindings_ |= enabled_bindings_flags;
 
   // Keep track of the total bindings accumulated in this process.
   RenderProcess::current()->AddBindings(enabled_bindings_flags);
 
   if (main_render_frame_)
     main_render_frame_->MaybeEnableMojoBindings();
 }
 
-void RenderViewImpl::OnDragTargetDragEnter(const DropData& drop_data,
-                                           const gfx::Point& client_point,
-                                           const gfx::Point& screen_point,
-                                           WebDragOperationsMask ops,
-                                           int key_modifiers) {
+void RenderViewImpl::OnDragTargetDragEnter(
+    const std::vector<DropData::MetaData>& drop_meta_data,
+    const gfx::Point& client_point,
+    const gfx::Point& screen_point,
+    WebDragOperationsMask ops,
+    int key_modifiers) {
   WebDragOperation operation = webview()->dragTargetDragEnter(
-      DropDataToWebDragData(drop_data),
-      ConvertWindowPointToViewport(client_point),
-      screen_point,
-      ops,
-      key_modifiers);
+      DropMetaDataToWebDragData(drop_meta_data), client_point, screen_point,
+      ops, key_modifiers);
 
   Send(new DragHostMsg_UpdateDragCursor(GetRoutingID(), operation));
 }
 
 void RenderViewImpl::OnDragTargetDragOver(const gfx::Point& client_point,
                                           const gfx::Point& screen_point,
                                           WebDragOperationsMask ops,
                                           int key_modifiers) {
   WebDragOperation operation = webview()->dragTargetDragOver(
       ConvertWindowPointToViewport(client_point),
       screen_point,
       ops,
       key_modifiers);
 
   Send(new DragHostMsg_UpdateDragCursor(GetRoutingID(), operation));
 }
 
 void RenderViewImpl::OnDragTargetDragLeave() {
   webview()->dragTargetDragLeave();
 }
 
-void RenderViewImpl::OnDragTargetDrop(const gfx::Point& client_point,
+void RenderViewImpl::OnDragTargetDrop(const DropData& drop_data,
+                                      const gfx::Point& client_point,
                                       const gfx::Point& screen_point,
                                       int key_modifiers) {
-  webview()->dragTargetDrop(
-      ConvertWindowPointToViewport(client_point), screen_point, key_modifiers);
+  webview()->dragTargetDrop(DropDataToWebDragData(drop_data), client_point,
+                            screen_point, key_modifiers);
 }
 
 void RenderViewImpl::OnDragSourceEnded(const gfx::Point& client_point,
                                        const gfx::Point& screen_point,
                                        WebDragOperation op) {
   webview()->dragSourceEndedAt(
       ConvertWindowPointToViewport(client_point), screen_point, op);
 }
 
 void RenderViewImpl::OnDragSourceSystemDragEnded() {
@@ skipping 925 matching lines @@
   if (IsUseZoomForDSFEnabled()) {
     webview()->setZoomFactorForDeviceScaleFactor(device_scale_factor_);
   } else {
     webview()->setDeviceScaleFactor(device_scale_factor_);
   }
   webview()->settings()->setPreferCompositingToLCDTextEnabled(
       PreferCompositingToLCDText(compositor_deps_, device_scale_factor_));
 }
 
 }  // namespace content