Drag-and-drop: DragEnter, DragOver, DragLeave, DragDrop

content/browser/renderer_host/render_widget_host_impl.cc

Index: content/browser/renderer_host/render_widget_host_impl.cc
diff --git a/content/browser/renderer_host/render_widget_host_impl.cc b/content/browser/renderer_host/render_widget_host_impl.cc
index 66b1d275a2011db4fcd2dee983a4c332c0dd8330..adafc2b3f67c22fcbe141fcd6b0aaf1ceced4889 100644
--- a/content/browser/renderer_host/render_widget_host_impl.cc
+++ b/content/browser/renderer_host/render_widget_host_impl.cc
@@ -79,6 +79,7 @@
 #include "skia/ext/image_operations.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
+#include "ui/base/clipboard/clipboard.h"
 #include "ui/events/blink/web_input_event_traits.h"
 #include "ui/events/event.h"
 #include "ui/events/keycodes/keyboard_codes.h"
@@ -97,6 +98,7 @@
 using base::Time;
 using base::TimeDelta;
 using base::TimeTicks;
+using blink::WebDragOperationsMask;
 using blink::WebGestureEvent;
 using blink::WebInputEvent;
 using blink::WebKeyboardEvent;
@@ -182,6 +184,56 @@ inline blink::WebGestureEvent CreateScrollEndForWrapping(
   return wrap_gesture_scroll_end;
 }
 
+std::vector<DropData::Metadata> DropDataToMetaData(const DropData& drop_data) {
+  std::vector<DropData::Metadata> metadata;
+  if (!drop_data.text.is_null()) {
+    metadata.push_back(DropData::Metadata::CreateForMimeType(
+        DropData::Kind::STRING,
+        base::ASCIIToUTF16(ui::Clipboard::kMimeTypeText)));
+  }
+
+  if (drop_data.url.is_valid()) {
+    metadata.push_back(DropData::Metadata::CreateForMimeType(
+        DropData::Kind::STRING,
+        base::ASCIIToUTF16(ui::Clipboard::kMimeTypeURIList)));
+  }
+
+  if (!drop_data.html.is_null()) {
+    metadata.push_back(DropData::Metadata::CreateForMimeType(
+        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()) {
+      metadata.push_back(DropData::Metadata::CreateForFilePath(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()) {
+      metadata.push_back(DropData::Metadata::CreateForMimeType(
+          DropData::Kind::FILENAME, mime_type));
+    }
+  }
+
+  for (const auto& file_system_file : drop_data.file_system_files) {
+    if (!file_system_file.url.is_empty()) {
+      metadata.push_back(
+          DropData::Metadata::CreateForFileSystemUrl(file_system_file.url));
+    }
+  }
+
+  for (const auto& custom_data_item : drop_data.custom_data) {
+    metadata.push_back(DropData::Metadata::CreateForMimeType(
+        DropData::Kind::STRING, custom_data_item.first));
+  }
+
+  return metadata;
+}
+
 }  // namespace
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -1277,6 +1329,42 @@ void RenderWidgetHostImpl::HandleCompositorProto(
   Send(new ViewMsg_HandleCompositorProto(GetRoutingID(), proto));
 }
 
+void RenderWidgetHostImpl::DragTargetDragEnter(
+    const DropData& drop_data,
+    const gfx::Point& client_pt,
+    const gfx::Point& screen_pt,
+    WebDragOperationsMask operations_allowed,
+    int key_modifiers) {
+  std::vector<DropData::Metadata> metadata = DropDataToMetaData(drop_data);
+  Send(new DragMsg_TargetDragEnter(GetRoutingID(), metadata, client_pt,
+                                   screen_pt, operations_allowed,
+                                   key_modifiers));
+}
+
+void RenderWidgetHostImpl::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 RenderWidgetHostImpl::DragTargetDragLeave() {
+  Send(new DragMsg_TargetDragLeave(GetRoutingID()));
+}
+
+void RenderWidgetHostImpl::DragTargetDrop(const DropData& drop_data,
+                                          const gfx::Point& client_pt,
+                                          const gfx::Point& screen_pt,
+                                          int key_modifiers) {
+  DropData drop_data_with_permissions(drop_data);
+  delegate()->GetRenderViewHost()->GrantFileAccessFromDropData(
+      &drop_data_with_permissions);
+  Send(new DragMsg_TargetDrop(GetRoutingID(), drop_data_with_permissions,
+                              client_pt, screen_pt, key_modifiers));
+}
+
 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
   if (delegate_)
     delegate_->ScreenInfoChanged();