// Copyright 2014 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 "config.h"
#include "core/paint/TextPainter.h"

#include "core/CSSPropertyNames.h"
#include "core/CSSValueKeywords.h"
#include "core/css/CSSPrimitiveValue.h"
#include "core/frame/Settings.h"
#include "core/layout/LayoutTestHelper.h"
#include "core/layout/LayoutText.h"
#include "core/style/ShadowData.h"
#include "core/style/ShadowList.h"
#include <gtest/gtest.h>

namespace blink {
namespace {

class TextPainterTest : public RenderingTest {
public:
    TextPainterTest() : m_layoutText(nullptr) { }

protected:
    LayoutText* layoutText() { return m_layoutText; }

private:
    virtual void SetUp() override
    {
        RenderingTest::SetUp();
        setBodyInnerHTML("Hello world");
        m_layoutText = toLayoutText(document().body()->firstChild()->layoutObject());
        ASSERT_TRUE(m_layoutText);
        ASSERT_EQ("Hello world", m_layoutText->text());
    }

    LayoutText* m_layoutText;
};

TEST_F(TextPainterTest, TextPaintingStyle_Simple)
{
    document().body()->setInlineStyleProperty(CSSPropertyColor, CSSValueBlue);
    document().view()->updateLayoutAndStyleForPainting();

    TextPainter::Style textStyle = TextPainter::textPaintingStyle(
        *layoutText(), layoutText()->styleRef(), false /* forceBlackText */, false /* isPrinting */);
    EXPECT_EQ(Color(0, 0, 255), textStyle.fillColor);
    EXPECT_EQ(Color(0, 0, 255), textStyle.strokeColor);
    EXPECT_EQ(Color(0, 0, 255), textStyle.emphasisMarkColor);
    EXPECT_EQ(0, textStyle.strokeWidth);
    EXPECT_EQ(nullptr, textStyle.shadow);
}

TEST_F(TextPainterTest, TextPaintingStyle_AllProperties)
{
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextFillColor, CSSValueRed);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextStrokeColor, CSSValueLime);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextEmphasisColor, CSSValueBlue);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextStrokeWidth, 4, CSSPrimitiveValue::CSS_PX);
    document().body()->setInlineStyleProperty(CSSPropertyTextShadow, "1px 2px 3px yellow");
    document().view()->updateLayoutAndStyleForPainting();

    TextPainter::Style textStyle = TextPainter::textPaintingStyle(
        *layoutText(), layoutText()->styleRef(), false /* forceBlackText */, false /* isPrinting */);
    EXPECT_EQ(Color(255, 0, 0), textStyle.fillColor);
    EXPECT_EQ(Color(0, 255, 0), textStyle.strokeColor);
    EXPECT_EQ(Color(0, 0, 255), textStyle.emphasisMarkColor);
    EXPECT_EQ(4, textStyle.strokeWidth);
    ASSERT_NE(nullptr, textStyle.shadow);
    EXPECT_EQ(1u, textStyle.shadow->shadows().size());
    EXPECT_EQ(1, textStyle.shadow->shadows()[0].x());
    EXPECT_EQ(2, textStyle.shadow->shadows()[0].y());
    EXPECT_EQ(3, textStyle.shadow->shadows()[0].blur());
    EXPECT_EQ(Color(255, 255, 0), textStyle.shadow->shadows()[0].color().color());
}

TEST_F(TextPainterTest, TextPaintingStyle_ForceBlackText)
{
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextFillColor, CSSValueRed);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextStrokeColor, CSSValueLime);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextEmphasisColor, CSSValueBlue);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextStrokeWidth, 4, CSSPrimitiveValue::CSS_PX);
    document().body()->setInlineStyleProperty(CSSPropertyTextShadow, "1px 2px 3px yellow");
    document().view()->updateLayoutAndStyleForPainting();

    TextPainter::Style textStyle = TextPainter::textPaintingStyle(
        *layoutText(), layoutText()->styleRef(), true /* forceBlackText */, false /* isPrinting */);
    EXPECT_EQ(Color::black, textStyle.fillColor);
    EXPECT_EQ(Color::black, textStyle.strokeColor);
    EXPECT_EQ(Color::black, textStyle.emphasisMarkColor);
    EXPECT_EQ(4, textStyle.strokeWidth);
    EXPECT_EQ(nullptr, textStyle.shadow);
}

TEST_F(TextPainterTest, TextPaintingStyle_ForceBackgroundToWhite_NoAdjustmentNeeded)
{
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextFillColor, CSSValueRed);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextStrokeColor, CSSValueLime);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextEmphasisColor, CSSValueBlue);
    document().body()->setInlineStyleProperty(CSSPropertyWebkitPrintColorAdjust, CSSValueEconomy);
    document().settings()->setShouldPrintBackgrounds(false);
    document().view()->updateLayoutAndStyleForPainting();

    TextPainter::Style textStyle = TextPainter::textPaintingStyle(
        *layoutText(), layoutText()->styleRef(), false /* forceBlackText */, true /* isPrinting */);
    EXPECT_EQ(Color(255, 0, 0), textStyle.fillColor);
    EXPECT_EQ(Color(0, 255, 0), textStyle.strokeColor);
    EXPECT_EQ(Color(0, 0, 255), textStyle.emphasisMarkColor);
}

TEST_F(TextPainterTest, TextPaintingStyle_ForceBackgroundToWhite_Darkened)
{
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextFillColor, "rgb(255, 220, 220)");
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextStrokeColor, "rgb(220, 255, 220)");
    document().body()->setInlineStyleProperty(CSSPropertyWebkitTextEmphasisColor, "rgb(220, 220, 255)");
    document().body()->setInlineStyleProperty(CSSPropertyWebkitPrintColorAdjust, CSSValueEconomy);
    document().settings()->setShouldPrintBackgrounds(false);
    document().view()->updateLayoutAndStyleForPainting();

    TextPainter::Style textStyle = TextPainter::textPaintingStyle(
        *layoutText(), layoutText()->styleRef(), false /* forceBlackText */, true /* isPrinting */);
    EXPECT_EQ(Color(255, 220, 220).dark(), textStyle.fillColor);
    EXPECT_EQ(Color(220, 255, 220).dark(), textStyle.strokeColor);
    EXPECT_EQ(Color(220, 220, 255).dark(), textStyle.emphasisMarkColor);
}

} // namespace
} // namespace blink
