// 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 "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/css/resolver/font_style_resolver.h"
#include "third_party/blink/renderer/core/css/threaded/multi_threaded_test_util.h"
#include "third_party/blink/renderer/platform/fonts/font.h"
#include "third_party/blink/renderer/platform/fonts/font_custom_platform_data.h"
#include "third_party/blink/renderer/platform/fonts/font_description.h"
#include "third_party/blink/renderer/platform/fonts/font_selector.h"
#include "third_party/blink/renderer/platform/fonts/shaping/caching_word_shape_iterator.h"
#include "third_party/blink/renderer/platform/fonts/shaping/harfbuzz_shaper.h"
#include "third_party/blink/renderer/platform/fonts/text_run_paint_info.h"
#include "third_party/blink/renderer/platform/graphics/test/mock_paint_canvas.h"
#include "third_party/blink/renderer/platform/language.h"
#include "third_party/blink/renderer/platform/testing/font_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/text/text_direction.h"

using testing::_;
using testing::Return;

using blink::test::CreateTestFont;

namespace blink {

TSAN_TEST(TextRendererThreadedTest, MeasureText) {
  RunOnThreads([]() {
    String text = "measure this";

    FontDescription font_description;
    font_description.SetComputedSize(12.0);
    font_description.SetLocale(LayoutLocale::Get("en"));
    ASSERT_EQ(USCRIPT_LATIN, font_description.GetScript());
    font_description.SetGenericFamily(FontDescription::kStandardFamily);

    Font font = Font(font_description);

    const SimpleFontData* font_data = font.PrimaryFont();
    ASSERT_TRUE(font_data);

    TextRun text_run(
        text, 0, 0,
        TextRun::kAllowTrailingExpansion | TextRun::kForbidLeadingExpansion,
        TextDirection::kLtr, false);
    text_run.SetNormalizeSpace(true);
    FloatRect text_bounds = font.SelectionRectForText(
        text_run, FloatPoint(), font.GetFontDescription().ComputedSize(), 0,
        -1);

    // X direction.
    EXPECT_EQ(78, font.Width(text_run));
    EXPECT_EQ(0, text_bounds.X());
    EXPECT_EQ(78, text_bounds.MaxX());

    // Y direction.
    const FontMetrics& font_metrics = font_data->GetFontMetrics();
    EXPECT_EQ(11, font_metrics.FloatAscent());
    EXPECT_EQ(3, font_metrics.FloatDescent());
    EXPECT_EQ(0, text_bounds.Y());
    EXPECT_EQ(12, text_bounds.MaxY());
  });
}

TSAN_TEST(TextRendererThreadedTest, DrawText) {
  callbacks_per_thread_ = 50;
  RunOnThreads([]() {
    String text = "draw this";

    FontDescription font_description;
    font_description.SetComputedSize(12.0);
    font_description.SetLocale(LayoutLocale::Get("en"));
    ASSERT_EQ(USCRIPT_LATIN, font_description.GetScript());
    font_description.SetGenericFamily(FontDescription::kStandardFamily);

    Font font = Font(font_description);

    FloatPoint location(0, 0);
    TextRun text_run(text, 0, 0, TextRun::kAllowTrailingExpansion,
                     TextDirection::kLtr, false);
    text_run.SetNormalizeSpace(true);

    TextRunPaintInfo text_run_paint_info(text_run);

    MockPaintCanvas mpc;
    PaintFlags flags;

    EXPECT_CALL(mpc, getSaveCount()).WillOnce(Return(17));
    EXPECT_CALL(mpc, drawTextBlob(_, 0, 0, _)).Times(1);
    EXPECT_CALL(mpc, restoreToCount(17)).WillOnce(Return());

    font.DrawBidiText(&mpc, text_run_paint_info, location,
                      Font::kUseFallbackIfFontNotReady, 1.0, flags);
  });
}

}  // namespace blink