1 files changed, 101 insertions, 0 deletions
diff --git a/ui/views/drag_utils.cc b/ui/views/drag_utils.cc
new file mode 100644
index 0000000..181a599
--- /dev/null
+++ b/ui/views/drag_utils.cc
@@ -0,0 +1,101 @@
+// Copyright (c) 2011 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 "ui/views/drag_utils.h"
+
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "base/utf_string_conversions.h"
+#include "googleurl/src/gurl.h"
+#include "grit/ui_resources.h"
+#include "ui/base/dragdrop/os_exchange_data.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/canvas_skia.h"
+#include "ui/gfx/font.h"
+#include "ui/views/controls/button/text_button.h"
+
+namespace drag_utils {
+
+// Maximum width of the link drag image in pixels.
+static const int kLinkDragImageMaxWidth = 200;
+static const int kLinkDragImageVPadding = 3;
+
+// File dragging pixel measurements
+static const int kFileDragImageMaxWidth = 200;
+static const SkColor kFileDragImageTextColor = SK_ColorBLACK;
+
+void SetURLAndDragImage(const GURL& url,
+                        const string16& title,
+                        const SkBitmap& icon,
+                        ui::OSExchangeData* data) {
+  DCHECK(url.is_valid() && data);
+
+  data->SetURL(url, title);
+
+  // Create a button to render the drag image for us.
+  views::TextButton button(NULL,
+                           title.empty() ? UTF8ToUTF16(url.spec()) : title);
+  button.set_max_width(kLinkDragImageMaxWidth);
+  if (icon.isNull()) {
+    button.SetIcon(*ResourceBundle::GetSharedInstance().GetBitmapNamed(
+                   IDR_DEFAULT_FAVICON));
+  } else {
+    button.SetIcon(icon);
+  }
+  gfx::Size prefsize = button.GetPreferredSize();
+  button.SetBounds(0, 0, prefsize.width(), prefsize.height());
+
+  // Render the image.
+  gfx::CanvasSkia canvas(prefsize.width(), prefsize.height(), false);
+  button.PaintButton(&canvas, views::TextButton::PB_FOR_DRAG);
+  SetDragImageOnDataObject(canvas, prefsize,
+      gfx::Point(prefsize.width() / 2, prefsize.height() / 2), data);
+}
+
+void CreateDragImageForFile(const FilePath& file_name,
+                            const SkBitmap* icon,
+                            ui::OSExchangeData* data_object) {
+  DCHECK(icon);
+  DCHECK(data_object);
+
+  // Set up our text portion
+  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
+  gfx::Font font = rb.GetFont(ResourceBundle::BaseFont);
+
+  const int width = kFileDragImageMaxWidth;
+  // Add +2 here to allow room for the halo.
+  const int height = font.GetHeight() + icon->height() +
+                     kLinkDragImageVPadding + 2;
+  gfx::CanvasSkia canvas(width, height, false /* translucent */);
+
+  // Paint the icon.
+  canvas.DrawBitmapInt(*icon, (width - icon->width()) / 2, 0);
+
+  string16 name = file_name.BaseName().LossyDisplayName();
+#if defined(OS_WIN)
+  // Paint the file name. We inset it one pixel to allow room for the halo.
+  canvas.DrawStringWithHalo(name, font, kFileDragImageTextColor, SK_ColorWHITE,
+                            1, icon->height() + kLinkDragImageVPadding + 1,
+                            width - 2, font.GetHeight(),
+                            gfx::Canvas::TEXT_ALIGN_CENTER);
+#else
+  canvas.DrawStringInt(name, font, kFileDragImageTextColor,
+                       0, icon->height() + kLinkDragImageVPadding,
+                       width, font.GetHeight(), gfx::Canvas::TEXT_ALIGN_CENTER);
+#endif
+
+  SetDragImageOnDataObject(canvas, gfx::Size(width, height),
+                           gfx::Point(width / 2, kLinkDragImageVPadding),
+                           data_object);
+}
+
+void SetDragImageOnDataObject(const gfx::Canvas& canvas,
+                              const gfx::Size& size,
+                              const gfx::Point& cursor_offset,
+                              ui::OSExchangeData* data_object) {
+  SetDragImageOnDataObject(
+      canvas.AsCanvasSkia()->ExtractBitmap(), size, cursor_offset, data_object);
+}
+
+}  // namespace drag_utils