1 files changed, 72 insertions, 0 deletions
diff --git a/chromium/ui/keyboard/display_util.cc b/chromium/ui/keyboard/display_util.cc
new file mode 100644
index 00000000000..d1431387fde
--- /dev/null
+++ b/chromium/ui/keyboard/display_util.cc
@@ -0,0 +1,72 @@
+// Copyright 2018 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/keyboard/display_util.h"
+
+#include "ui/aura/window.h"
+#include "ui/display/display.h"
+#include "ui/display/screen.h"
+#include "ui/display/types/display_constants.h"
+
+namespace {
+
+constexpr int kWindowMargin = 10;
+
+}  // namespace
+
+namespace keyboard {
+
+DisplayUtil::DisplayUtil() {}
+
+int64_t DisplayUtil::GetNearestDisplayIdToWindow(aura::Window* window) const {
+  return GetNearestDisplayToWindow(window).id();
+}
+
+display::Display DisplayUtil::GetNearestDisplayToWindow(
+    aura::Window* window) const {
+  return display::Screen::GetScreen()->GetDisplayNearestWindow(window);
+}
+
+display::Display DisplayUtil::FindAdjacentDisplayIfPointIsNearMargin(
+    const display::Display& current_display,
+    const gfx::Point& point_in_local) const {
+  const gfx::Rect current_bounds = current_display.bounds();
+
+  const gfx::Point point =
+      point_in_local + current_display.bounds().origin().OffsetFromOrigin();
+
+  int representative_x = point.x();
+  int representative_y = point.y();
+
+  int current_left = current_bounds.x();
+  int current_right = current_left + current_bounds.width();
+  int current_top = current_bounds.y();
+  int current_bottom = current_top + current_bounds.height();
+
+  // If the point is close to
+  if (point.x() - current_left <= kWindowMargin) {
+    representative_x = current_left - kWindowMargin;
+  } else if (current_right - point.x() <= kWindowMargin) {
+    representative_x = current_right + kWindowMargin;
+  } else if (point.y() - current_top <= kWindowMargin) {
+    representative_y = current_top - kWindowMargin;
+  } else if (current_bottom - point.y() <= kWindowMargin) {
+    representative_y = current_bottom + kWindowMargin;
+  } else {
+    return current_display;
+  }
+
+  for (const display::Display& display :
+       display::Screen::GetScreen()->GetAllDisplays()) {
+    const gfx::Rect& new_bounds = display.work_area();
+    if (display.touch_support() == display::Display::TouchSupport::AVAILABLE &&
+        display.id() != current_display.id() &&
+        new_bounds.Contains(representative_x, representative_y)) {
+      return display;
+    }
+  }
+  return current_display;
+}
+
+}  // namespace keyboard