Move views::Label DisabledColor logic into views::LabelButtonLabel

ui/views/controls/button/label_button_label_unittest.cc

+// Copyright 2017 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/views/controls/button/label_button_label.h"
+
+#include <memory>
+
+#include "third_party/skia/include/core/SkColor.h"
+#include "ui/native_theme/native_theme_base.h"
+#include "ui/views/test/views_test_base.h"
+
+namespace views {
+namespace {
+
+// Basic NativeTheme that can customize colors.
+class TestNativeTheme : public ui::NativeThemeBase {
+ public:
+  TestNativeTheme() {}
+
+  void Set(ColorId id, SkColor color) { colors_[id] = color; }
+
+  // NativeThemeBase:
+  SkColor GetSystemColor(ColorId color_id) const override {
+    return colors_.count(color_id) ? colors_.find(color_id)->second
+                                   : SK_ColorMAGENTA;
+  }
+
+ private:
+  std::map<ColorId, SkColor> colors_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestNativeTheme);
+};
+
+// LabelButtonLabel subclass that reports its text color whenever a paint is
+// scheduled.
+class TestLabel : public LabelButtonLabel {
+ public:
+  explicit TestLabel(SkColor* last_color)
+      : LabelButtonLabel(base::string16(), views::style::CONTEXT_BUTTON),
+        last_color_(last_color) {}
+
+  // LabelButtonLabel:
+  void SchedulePaintInRect(const gfx::Rect& r) override {
+    LabelButtonLabel::SchedulePaintInRect(r);
+    *last_color_ = enabled_color();
+  }
+
+ private:
+  SkColor* last_color_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestLabel);
+};
+
+}  // namespace
+
+class LabelButtonLabelTest : public ViewsTestBase {
+ public:
+  LabelButtonLabelTest() {}
+
+  void SetUp() override {
+    ViewsTestBase::SetUp();
+    label_ = base::MakeUnique<TestLabel>(&last_color_);
+  }
+
+ protected:
+  SkColor last_color_ = SK_ColorCYAN;
+  std::unique_ptr<TestLabel> label_;
+  TestNativeTheme theme1_;
+  TestNativeTheme theme2_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(LabelButtonLabelTest);
+};
+
+// Test that LabelButtonLabel reacts properly to themed and overridden colors.
+TEST_F(LabelButtonLabelTest, Colors) {
+  // The SchedulePaintInRect override won't be called while the base class is
+  // initialized. Not much we can do about that, so give it the first for free.
+  EXPECT_EQ(SK_ColorCYAN, last_color_);  // Sanity check.
+
+  // At the same time we can check that changing the auto color readability
+  // schedules a paint. Currently it does. Although it technically doesn't need
+  // to since the color isn't actually changing.
+  label_->SetAutoColorReadabilityEnabled(false);
+
+  // First one comes from the default theme. This check ensures the SK_ColorRED
+  // placeholder initializers were replaced.
+  SkColor default_theme_enabled_color =
+      label_->GetNativeTheme()->GetSystemColor(
+          ui::NativeTheme::kColorId_LabelEnabledColor);
+  EXPECT_EQ(default_theme_enabled_color, last_color_);
+
+  // Note these are not kColorId_Button{Enabled,Disabled}Color because "Button
+  // colors are used only for STYLE_BUTTON, otherwise we use label colors." See
+  // LabelButton::ResetColorsFromNativeTheme().
+  theme1_.Set(ui::NativeTheme::kColorId_LabelEnabledColor, SK_ColorGREEN);
+  theme1_.Set(ui::NativeTheme::kColorId_LabelDisabledColor, SK_ColorYELLOW);
+  label_->SetNativeTheme(&theme1_);
+
+  // Setting the theme should paint.
+  EXPECT_EQ(SK_ColorGREEN, last_color_);
+
+  label_->SetEnabled(false);
+  EXPECT_EQ(SK_ColorYELLOW, last_color_);
+
+  // Set up a second theme. View::SetNativeTheme() makes the reasonable
+  // assumption that NativeTheme doesn't change its mind about things unless a
+  // Widget triggers it (which it can do as a friend of RootView).
+  theme2_.Set(ui::NativeTheme::kColorId_LabelEnabledColor, SK_ColorBLUE);
+  theme2_.Set(ui::NativeTheme::kColorId_LabelDisabledColor, SK_ColorGRAY);
+  label_->SetNativeTheme(&theme2_);
+
+  EXPECT_EQ(SK_ColorGRAY, last_color_);
+
+  label_->SetEnabled(true);
+  EXPECT_EQ(SK_ColorBLUE, last_color_);
+
+  // Override the theme for the disabled color.
+  label_->SetDisabledColor(SK_ColorRED);
+
+  // Still enabled, so not RED yet.
+  EXPECT_EQ(SK_ColorBLUE, last_color_);
+
+  label_->SetEnabled(false);
+  EXPECT_EQ(SK_ColorRED, last_color_);
+
+  label_->SetDisabledColor(SK_ColorMAGENTA);
+  EXPECT_EQ(SK_ColorMAGENTA, last_color_);
+
+  // Disabled still overridden after a theme change.
+  label_->SetNativeTheme(&theme1_);
+  EXPECT_EQ(SK_ColorMAGENTA, last_color_);
+
+  // The enabled color still gets its value from the theme.
+  label_->SetEnabled(true);
+  EXPECT_EQ(SK_ColorGREEN, last_color_);
+
+  label_->SetEnabledColor(SK_ColorYELLOW);
+  label_->SetDisabledColor(SK_ColorCYAN);
+  EXPECT_EQ(SK_ColorYELLOW, last_color_);
+  label_->SetEnabled(false);
+  EXPECT_EQ(SK_ColorCYAN, last_color_);
+}
+
+}  // namespace views