mac: Implement webContents.startDrag

atom/browser/ui/drag_util.h

@@ -0,0 +1,22 @@
+// Copyright (c) 2016 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef ATOM_BROWSER_UI_DRAG_UTIL_H_
+#define ATOM_BROWSER_UI_DRAG_UTIL_H_
+
+#include "ui/gfx/image/image.h"
+
+namespace base {
+class FilePath;
+}
+
+namespace atom {
+
+void DragItem(const base::FilePath& path,
+              const gfx::Image& icon,
+              gfx::NativeView view);
+
+}  // namespace atom
+
+#endif  // ATOM_BROWSER_UI_DRAG_UTIL_H_

atom/browser/ui/drag_util_mac.mm

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+// Copyright (c) 2016 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#import <Cocoa/Cocoa.h>
+
+#include "atom/browser/ui/drag_util.h"
+#include "base/files/file_path.h"
+#include "base/strings/sys_string_conversions.h"
+
+namespace atom {
+
+namespace {
+
+// Write information about the file being dragged to the pasteboard.
+void AddFileToPasteboard(NSPasteboard* pasteboard, const base::FilePath& path) {
+  NSString* file = base::SysUTF8ToNSString(path.value());
+  NSArray* fileList = [NSArray arrayWithObject:file];
+  [pasteboard declareTypes:[NSArray arrayWithObject:NSFilenamesPboardType]
+                     owner:nil];
+  [pasteboard setPropertyList:fileList forType:NSFilenamesPboardType];
+}
+
+}  // namespace
+
+void DragItem(const base::FilePath& path,
+              const gfx::Image& icon,
+              gfx::NativeView view) {
+  NSPasteboard* pasteboard = [NSPasteboard pasteboardWithName:NSDragPboard];
+  AddFileToPasteboard(pasteboard, path);
+
+  // Synthesize a drag event, since we don't have access to the actual event
+  // that initiated a drag (possibly consumed by the Web UI, for example).
+  NSPoint position = [[view window] mouseLocationOutsideOfEventStream];
+  NSTimeInterval eventTime = [[NSApp currentEvent] timestamp];
+  NSEvent* dragEvent = [NSEvent mouseEventWithType:NSLeftMouseDragged
+                                          location:position
+                                     modifierFlags:NSLeftMouseDraggedMask
+                                         timestamp:eventTime
+                                      windowNumber:[[view window] windowNumber]
+                                           context:nil
+                                       eventNumber:0
+                                        clickCount:1
+                                          pressure:1.0];
+
+  // Run the drag operation.
+  [[view window] dragImage:icon.ToNSImage()
+                        at:position
+                    offset:NSZeroSize
+                     event:dragEvent
+                pasteboard:pasteboard
+                    source:view
+                 slideBack:YES];
+}
+
+}  // namespace atom

atom/browser/ui/drag_util_views.cc

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+// Copyright (c) 2016 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "atom/browser/ui/drag_util.h"
+
+namespace atom {
+
+
+
+}  // namespace atom