"Bootstrap" a toolkit-views Typography spec.

chrome/browser/ui/views/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 "chrome/browser/ui/views/harmony/layout_delegate.h"
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "chrome/browser/ui/views/chrome_views_delegate.h"
 #include "chrome/browser/ui/views/harmony/harmony_layout_delegate.h"
+#include "ui/base/default_style.h"
 #include "ui/base/material_design/material_design_controller.h"
+#include "ui/base/resource/resource_bundle.h"
 #include "ui/views/layout/layout_constants.h"
+#include "ui/views/style/typography_provider.h"
 
-static base::LazyInstance<LayoutDelegate>::DestructorAtExit layout_delegate_ =
+namespace {
+
+// TypographyProvider that provides pre-Harmony fonts in Chrome.
+class LegacyTypographyProvider : public views::DefaultTypographyProvider {
+ public:
+  LegacyTypographyProvider() = default;
+
+  const gfx::FontList& GetFont(views::TextContext context,
+                               views::TextStyle style) const override;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(LegacyTypographyProvider);
+};
+
+const gfx::FontList& LegacyTypographyProvider::GetFont(
+    views::TextContext context,
+    views::TextStyle style) const {
+  constexpr int kHeadlineDelta = 8;
+  constexpr int kDialogMessageDelta = 1;
+
+  int size_delta;
+  gfx::Font::Weight font_weight;
+  GetDefaultFont(context, style, &size_delta, &font_weight);
+
+  switch (context.value()) {
+    case ChromeTextContext::HEADLINE:
+      size_delta = kHeadlineDelta;
+      break;
+    case ChromeTextContext::DIALOG_MESSAGE:
+      // Note: Not using ui::kMessageFontSizeDelta, so 13pt in most cases.
+      size_delta = kDialogMessageDelta;
+      break;
+    case ChromeTextContext::DIALOG_TEXT_SMALL:
+      size_delta = ui::kLabelFontSizeDelta;
+      break;
+    case ChromeTextContext::DEPRECATED_SMALL:
+      size_delta = ui::ResourceBundle::kSmallFontDelta;
+      break;
+  }
+
+  switch (style.value()) {
+    case ChromeTextStyle::WEB_DOMAIN:
+    case ChromeTextStyle::EXTENSION_NAME:
+      font_weight = gfx::Font::Weight::BOLD;
+      break;
+  }
+  constexpr gfx::Font::FontStyle kFontStyle = gfx::Font::NORMAL;
+  return ui::ResourceBundle::GetSharedInstance().GetFontListWithDelta(
+      size_delta, kFontStyle, font_weight);
+}
+
+base::LazyInstance<LayoutDelegate>::DestructorAtExit layout_delegate_ =
     LAZY_INSTANCE_INITIALIZER;
 
+}  // namespace
+
+constexpr const views::TextContext::Value ChromeTextContext::HEADLINE;
+constexpr const views::TextContext::Value ChromeTextContext::DIALOG_TEXT_SMALL;
+constexpr const views::TextContext::Value ChromeTextContext::DEPRECATED_SMALL;
+constexpr const views::TextStyle::Value ChromeTextStyle::SECONDARY;
+constexpr const views::TextStyle::Value ChromeTextStyle::HINT;
+constexpr const views::TextStyle::Value ChromeTextStyle::RED;
+constexpr const views::TextStyle::Value ChromeTextStyle::GREEN;
+constexpr const views::TextStyle::Value ChromeTextStyle::WEB_DOMAIN;
+constexpr const views::TextStyle::Value ChromeTextStyle::EXTENSION_NAME;
+
 // static
 LayoutDelegate* LayoutDelegate::Get() {
+  // TODO(tapted): Move this to the LayoutDelegate constructor when
+  // HarmonyLayoutDelegate sets provides its own TypographyProvider.
+  views::TypographyProvider::Set(base::WrapUnique<views::TypographyProvider>(
+      new LegacyTypographyProvider));
   return ui::MaterialDesignController::IsSecondaryUiMaterial()
              ? HarmonyLayoutDelegate::Get()
              : layout_delegate_.Pointer();
 }
 
 int LayoutDelegate::GetMetric(Metric metric) const {
   switch (metric) {
     case Metric::BUTTON_HORIZONTAL_PADDING:
       return ChromeViewsDelegate::GetInstance()->GetDefaultDistanceMetric(
           views::DistanceMetric::BUTTON_HORIZONTAL_PADDING);
@@ skipping 48 matching lines @@
   return true;
 }
 
 bool LayoutDelegate::IsHarmonyMode() const {
   return false;
 }
 
 int LayoutDelegate::GetDialogPreferredWidth(DialogWidth width) const {
   return 0;
 }