Refactor ViewsDelegate and MD-ify the icon-to-text spacing for checkbox and radiobutton

chrome/browser/ui/views/chrome_views_delegate.cc

 // Copyright (c) 2012 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 "chrome/browser/ui/views/chrome_views_delegate.h"
 
 #include <memory>
 
 #include "base/location.h"
 #include "base/logging.h"
@@ skipping 180 matching lines @@
 #endif
 
 #if defined(USE_ASH)
 void ProcessAcceleratorNow(const ui::Accelerator& accelerator) {
   // TODO(afakhry): See if we need here to send the accelerator to the
   // FocusManager of the active window in a follow-up CL.
   ash::WmShell::Get()->accelerator_controller()->Process(accelerator);
 }
 #endif  // defined(USE_ASH)
 
+ChromeViewsDelegate* views_delegate = nullptr;
+
 }  // namespace
 
 
 // ChromeViewsDelegate --------------------------------------------------------
 
 #if defined(OS_WIN)
 ChromeViewsDelegate::ChromeViewsDelegate()
     : in_autohide_edges_callback_(false),
       weak_factory_(this) {
 #else
 ChromeViewsDelegate::ChromeViewsDelegate() {
 #endif
+  DCHECK(!views_delegate);
+  views_delegate = this;
 }
 
 ChromeViewsDelegate::~ChromeViewsDelegate() {
   DCHECK_EQ(0u, ref_count_);
+
+  DCHECK_EQ(this, views_delegate);
+  views_delegate = nullptr;
+}
+
+ChromeViewsDelegate* ChromeViewsDelegate::GetInstance() {
+  return views_delegate;
 }
 
 void ChromeViewsDelegate::SaveWindowPlacement(const views::Widget* window,
                                               const std::string& window_name,
                                               const gfx::Rect& bounds,
                                               ui::WindowShowState show_state) {
   PrefService* prefs = GetPrefsForWindow(window);
   if (!prefs)
     return;
 
@@ skipping 315 matching lines @@
   base::AutoReset<bool> in_callback_setter(&in_autohide_edges_callback_, true);
   callback.Run();
 }
 #endif
 
 scoped_refptr<base::TaskRunner>
 ChromeViewsDelegate::GetBlockingPoolTaskRunner() {
   return content::BrowserThread::GetBlockingPool();
 }
 
-gfx::Insets ChromeViewsDelegate::GetDialogButtonInsets() const {
+gfx::Insets ChromeViewsDelegate::GetInsetsMetric(
+    views::InsetsMetric metric) const {
   const LayoutDelegate* layout_delegate = LayoutDelegate::Get();
-  const int top = layout_delegate->GetMetric(
-      LayoutDelegate::Metric::DIALOG_BUTTON_TOP_SPACING);
-  const int margin = layout_delegate->GetMetric(
-      LayoutDelegate::Metric::DIALOG_BUTTON_MARGIN);
-  return gfx::Insets(top, margin, margin, margin);
+  switch (metric) {
+    case views::InsetsMetric::DIALOG_BUTTON: {
+      const int top = layout_delegate->GetMetric(
+          LayoutDelegate::Metric::DIALOG_BUTTON_TOP_SPACING);
+      const int margin = layout_delegate->GetMetric(
+          LayoutDelegate::Metric::DIALOG_BUTTON_MARGIN);
+      return gfx::Insets(top, margin, margin, margin);
+    }
+    case views::InsetsMetric::DIALOG_FRAME_VIEW: {
+      const int top = layout_delegate->GetMetric(
+          LayoutDelegate::Metric::PANEL_CONTENT_MARGIN);
+      const int side = layout_delegate->GetMetric(
+          LayoutDelegate::Metric::DIALOG_BUTTON_MARGIN);
+      // Titles are inset at the top and sides, but not at the bottom.
+      return gfx::Insets(top, side, 0, side);
+    }
+    case views::InsetsMetric::BUBBLE_DIALOG:
+      return gfx::Insets(layout_delegate->GetMetric(
+          LayoutDelegate::Metric::PANEL_CONTENT_MARGIN));
+  }
+  NOTREACHED();
+  return gfx::Insets();
 }
 
-int ChromeViewsDelegate::GetDialogCloseButtonMargin() const {
-  return LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::DIALOG_CLOSE_BUTTON_MARGIN);
-}
-
-int ChromeViewsDelegate::GetDialogRelatedButtonHorizontalSpacing() const {
-  return LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::RELATED_BUTTON_HORIZONTAL_SPACING);
-}
-
-int ChromeViewsDelegate::GetDialogRelatedControlVerticalSpacing() const {
-  return LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::RELATED_CONTROL_VERTICAL_SPACING);
-}
-
-gfx::Insets ChromeViewsDelegate::GetDialogFrameViewInsets() const {
-  const LayoutDelegate* layout_delegate = LayoutDelegate::Get();
-  const int top = layout_delegate->GetMetric(
-      LayoutDelegate::Metric::PANEL_CONTENT_MARGIN);
-  const int side = layout_delegate->GetMetric(
-      LayoutDelegate::Metric::DIALOG_BUTTON_MARGIN);
-  // Titles are inset at the top and sides, but not at the bottom.
-  return gfx::Insets(top, side, 0, side);
-}
-
-gfx::Insets ChromeViewsDelegate::GetBubbleDialogMargins() const {
-  return gfx::Insets(LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::PANEL_CONTENT_MARGIN));
-}
-
-int ChromeViewsDelegate::GetButtonMinimumWidth() const {
-  return LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::BUTTON_MINIMUM_WIDTH);
-}
-
-int ChromeViewsDelegate::GetDialogButtonMinimumWidth() const {
-  return LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::DIALOG_BUTTON_MINIMUM_WIDTH);
-}
-
-int ChromeViewsDelegate::GetButtonHorizontalPadding() const {
-  return LayoutDelegate::Get()->GetMetric(
-      LayoutDelegate::Metric::BUTTON_HORIZONTAL_PADDING);
+int ChromeViewsDelegate::GetSpacingMetric(views::SpacingMetric metric) const {
+  switch (metric) {
+    case views::SpacingMetric::CLOSE_BUTTON_MARGIN:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::DIALOG_CLOSE_BUTTON_MARGIN);
+    case views::SpacingMetric::RELATED_HORIZONTAL_BUTTON:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::RELATED_BUTTON_HORIZONTAL_SPACING);
+    case views::SpacingMetric::RELATED_VERTICAL_CONTROL:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::RELATED_CONTROL_VERTICAL_SPACING);
+    case views::SpacingMetric::ICON_TO_TEXT:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::ICON_TEXT_SPACING);
+    case views::SpacingMetric::DIALOG_BUTTON_MINIMUM_WIDTH:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::DIALOG_BUTTON_MINIMUM_WIDTH);
+    case views::SpacingMetric::BUTTON_HORIZONTAL_PADDING:
+      return LayoutDelegate::Get()->GetMetric(
+          LayoutDelegate::Metric::BUTTON_HORIZONTAL_PADDING);
+  }
+  NOTREACHED();
+  return 0;
 }
 
 #if !defined(USE_ASH)
 views::Widget::InitParams::WindowOpacity
 ChromeViewsDelegate::GetOpacityForInitParams(
     const views::Widget::InitParams& params) {
   return views::Widget::InitParams::OPAQUE_WINDOW;
 }
 #endif