1 files changed, 69 insertions, 0 deletions
diff --git a/components/view_manager/view_coordinate_conversions.cc b/components/view_manager/view_coordinate_conversions.cc
new file mode 100644
index 0000000..8237875
--- /dev/null
+++ b/components/view_manager/view_coordinate_conversions.cc
@@ -0,0 +1,69 @@
+// Copyright 2014 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 "components/view_manager/view_coordinate_conversions.h"
+
+#include "components/view_manager/server_view.h"
+#include "ui/gfx/geometry/point.h"
+#include "ui/gfx/geometry/point_conversions.h"
+#include "ui/gfx/geometry/point_f.h"
+#include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/geometry/vector2d.h"
+#include "ui/gfx/geometry/vector2d_f.h"
+
+namespace view_manager {
+
+namespace {
+
+gfx::Vector2dF CalculateOffsetToAncestor(const ServerView* view,
+                                         const ServerView* ancestor) {
+  DCHECK(ancestor->Contains(view));
+  gfx::Vector2d result;
+  for (const ServerView* v = view; v != ancestor; v = v->parent())
+    result += v->bounds().OffsetFromOrigin();
+  return gfx::Vector2dF(result.x(), result.y());
+}
+
+}  // namespace
+
+gfx::Point ConvertPointBetweenViews(const ServerView* from,
+                                    const ServerView* to,
+                                    const gfx::Point& point) {
+  return gfx::ToFlooredPoint(
+      ConvertPointFBetweenViews(from, to, gfx::PointF(point.x(), point.y())));
+}
+
+gfx::PointF ConvertPointFBetweenViews(const ServerView* from,
+                                      const ServerView* to,
+                                      const gfx::PointF& point) {
+  DCHECK(from);
+  DCHECK(to);
+  if (from == to)
+    return point;
+
+  if (from->Contains(to)) {
+    const gfx::Vector2dF offset(CalculateOffsetToAncestor(to, from));
+    return point - offset;
+  }
+  DCHECK(to->Contains(from));
+  const gfx::Vector2dF offset(CalculateOffsetToAncestor(from, to));
+  return point + offset;
+}
+
+gfx::Rect ConvertRectBetweenViews(const ServerView* from,
+                                  const ServerView* to,
+                                  const gfx::Rect& rect) {
+  DCHECK(from);
+  DCHECK(to);
+  if (from == to)
+    return rect;
+
+  const gfx::Point top_left(ConvertPointBetweenViews(from, to, rect.origin()));
+  const gfx::Point bottom_right(gfx::ToCeiledPoint(ConvertPointFBetweenViews(
+      from, to, gfx::PointF(rect.right(), rect.bottom()))));
+  return gfx::Rect(top_left.x(), top_left.y(), bottom_right.x() - top_left.x(),
+                   bottom_right.y() - top_left.y());
+}
+
+}  // namespace view_manager