views: add layout delegates

ui/harmony/harmony_layout_delegate.cc

+// Copyright 2016 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/base/material_design/material_design_controller.h"
+#include "ui/harmony/harmony_layout_delegate.h"
+#include "ui/views/view.h"
+
+namespace ui {
+
+static HarmonyLayoutDelegate harmony_layout_delegate_;
+
+// static
+HarmonyLayoutDelegate* HarmonyLayoutDelegate::Get() {
+  return &harmony_layout_delegate_;
+}
+
+// static
+void HarmonyLayoutDelegate::ApplyToViewIfNeeded(views::View* view) {
+  if (ui::MaterialDesignController::IsSecondaryUiMaterial())
+    view->SetLayoutDelegate(&harmony_layout_delegate_);
+}
+
+int HarmonyLayoutDelegate::GetLayoutDistance(LayoutDistanceType type) const {
+  const int kLayoutUnit = 16;
+  switch (type) {
+    case PANEL_VERT_MARGIN:
+      return kLayoutUnit;
+    case RELATED_BUTTON_HORIZONTAL_SPACING:
+      return kLayoutUnit / 2;
+    case RELATED_CONTROL_HORIZONTAL_SPACING:
+      return kLayoutUnit;
+    case RELATED_CONTROL_VERTICAL_SPACING:
+      return kLayoutUnit / 2;
+    case UNRELATED_CONTROL_VERTICAL_SPACING:
+      return kLayoutUnit;
+    case UNRELATED_CONTROL_LARGE_VERTICAL_SPACING:
+      return kLayoutUnit;
+    case BUTTON_VEDGE_MARGIN_NEW:
+      return kLayoutUnit;
+    case BUTTON_HEDGE_MARGIN_NEW:
+      return kLayoutUnit;
+  }
+}
+
+bool HarmonyLayoutDelegate::UseExtraDialogPadding() const {
+  return false;
+}
+
+}  // namespace ui