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// 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 "third_party/blink/renderer/platform/text/hyphenation.h"
#include "build/build_config.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/text/layout_locale.h"
using testing::ElementsAre;
using testing::ElementsAreArray;
#if defined(USE_MINIKIN_HYPHENATION) && defined(OS_FUCHSIA)
// Fuchsia doesn't include |blink_platform_unittests_data|.
#undef USE_MINIKIN_HYPHENATION
#endif
#if defined(USE_MINIKIN_HYPHENATION)
#include "base/files/file_path.h"
#include "third_party/blink/renderer/platform/text/hyphenation/hyphenation_minikin.h"
#endif
namespace blink {
class NoHyphenation : public Hyphenation {
public:
wtf_size_t LastHyphenLocation(const StringView&,
wtf_size_t before_index) const override {
return 0;
}
};
class HyphenationTest : public testing::Test {
protected:
void TearDown() override { LayoutLocale::ClearForTesting(); }
#if defined(USE_MINIKIN_HYPHENATION) || defined(OS_MAC)
// Get a |Hyphenation| instance for the specified locale for testing.
scoped_refptr<Hyphenation> GetHyphenation(const AtomicString& locale) {
#if defined(USE_MINIKIN_HYPHENATION)
// Because the mojo service to open hyphenation dictionaries is not
// accessible from the unit test, open the dictionary file directly for
// testing.
std::string filename = "hyph-" + locale.Ascii() + ".hyb";
#if defined(OS_ANDROID)
base::FilePath path("/system/usr/hyphen-data");
#else
base::FilePath path = test::HyphenationDictionaryDir();
#endif
path = path.AppendASCII(filename);
base::File file(path, base::File::FLAG_OPEN | base::File::FLAG_READ);
if (file.IsValid())
return HyphenationMinikin::FromFileForTesting(std::move(file));
#else
if (const LayoutLocale* layout_locale = LayoutLocale::Get(locale))
return layout_locale->GetHyphenation();
#endif
return nullptr;
}
#endif
#if defined(USE_MINIKIN_HYPHENATION)
void TestWordToHyphenate(StringView text,
StringView expected,
unsigned expected_num_leading_chars) {
unsigned num_leading_chars;
const StringView result =
HyphenationMinikin::WordToHyphenate(text, &num_leading_chars);
EXPECT_EQ(result, expected);
EXPECT_EQ(num_leading_chars, expected_num_leading_chars);
// |WordToHyphenate| has separate codepaths for 8 and 16 bits. Make sure
// both codepaths return the same results. When a paragraph has at least one
// 16 bits character (e.g., Emoji), there will be 8 bits words in 16 bits
// string.
if (!text.Is8Bit()) {
// If |text| is 16 bits, 16 bits codepath is already tested.
return;
}
String text16 = text.ToString();
text16.Ensure16Bit();
const StringView result16 =
HyphenationMinikin::WordToHyphenate(text16, &num_leading_chars);
EXPECT_EQ(result16, expected);
EXPECT_EQ(num_leading_chars, expected_num_leading_chars);
}
#endif
};
TEST_F(HyphenationTest, Get) {
scoped_refptr<Hyphenation> hyphenation = base::AdoptRef(new NoHyphenation);
LayoutLocale::SetHyphenationForTesting("en-US", hyphenation);
EXPECT_EQ(hyphenation.get(), LayoutLocale::Get("en-US")->GetHyphenation());
LayoutLocale::SetHyphenationForTesting("en-UK", nullptr);
EXPECT_EQ(nullptr, LayoutLocale::Get("en-UK")->GetHyphenation());
}
#if defined(USE_MINIKIN_HYPHENATION)
TEST_F(HyphenationTest, MapLocale) {
EXPECT_EQ(HyphenationMinikin::MapLocale("de-de"), "de-1996");
EXPECT_EQ(HyphenationMinikin::MapLocale("de-de-xyz"), "de-1996");
EXPECT_EQ(HyphenationMinikin::MapLocale("de-li"), "de-1996");
EXPECT_EQ(HyphenationMinikin::MapLocale("de-li-1901"), "de-ch-1901");
EXPECT_EQ(HyphenationMinikin::MapLocale("en"), "en-gb");
EXPECT_EQ(HyphenationMinikin::MapLocale("en-gu"), "en-us");
EXPECT_EQ(HyphenationMinikin::MapLocale("en-gu-xyz"), "en-us");
EXPECT_EQ(HyphenationMinikin::MapLocale("en-xyz"), "en-gb");
EXPECT_EQ(HyphenationMinikin::MapLocale("en-xyz-xyz"), "en-gb");
EXPECT_EQ(HyphenationMinikin::MapLocale("fr-ca"), "fr");
EXPECT_EQ(HyphenationMinikin::MapLocale("fr-fr"), "fr");
EXPECT_EQ(HyphenationMinikin::MapLocale("fr-fr-xyz"), "fr");
EXPECT_EQ(HyphenationMinikin::MapLocale("mn-xyz"), "mn-cyrl");
EXPECT_EQ(HyphenationMinikin::MapLocale("und-Deva-xyz"), "hi");
const char* no_map_locales[] = {"en-us", "fr"};
for (const char* locale_str : no_map_locales) {
AtomicString locale(locale_str);
AtomicString mapped_locale = HyphenationMinikin::MapLocale(locale);
// If no mapping, the same instance should be returned.
EXPECT_EQ(locale.Impl(), mapped_locale.Impl());
}
}
#endif
#if defined(USE_MINIKIN_HYPHENATION) || defined(OS_MAC)
TEST_F(HyphenationTest, HyphenLocations) {
scoped_refptr<Hyphenation> hyphenation = GetHyphenation("en-us");
#if defined(OS_ANDROID)
// Hyphenation is available only for Android M MR1 or later.
if (!hyphenation)
return;
#endif
ASSERT_TRUE(hyphenation) << "Cannot find the hyphenation for en-us";
// Get all hyphenation points by |HyphenLocations|.
const String word("hyphenation");
Vector<wtf_size_t, 8> locations = hyphenation->HyphenLocations(word);
EXPECT_GT(locations.size(), 0u);
for (wtf_size_t i = 1; i < locations.size(); i++) {
ASSERT_GT(locations[i - 1], locations[i])
<< "hyphenLocations must return locations in the descending order";
}
// Test |LastHyphenLocation| returns all hyphenation points.
Vector<wtf_size_t, 8> actual;
for (wtf_size_t offset = word.length();;) {
offset = hyphenation->LastHyphenLocation(word, offset);
if (!offset)
break;
actual.push_back(offset);
}
EXPECT_THAT(actual, ElementsAreArray(locations));
// Test |FirstHyphenLocation| returns all hyphenation points.
actual.clear();
for (wtf_size_t offset = 0;;) {
offset = hyphenation->FirstHyphenLocation(word, offset);
if (!offset)
break;
actual.push_back(offset);
}
locations.Reverse();
EXPECT_THAT(actual, ElementsAreArray(locations));
}
#if defined(USE_MINIKIN_HYPHENATION)
TEST_F(HyphenationTest, WordToHyphenate) {
TestWordToHyphenate("word", "word", 0);
TestWordToHyphenate(" word", "word", 1);
TestWordToHyphenate(" word", "word", 2);
TestWordToHyphenate(" word..", "word", 2);
TestWordToHyphenate(" ( word. ).", "word", 3);
TestWordToHyphenate(u" ( \u3042. ).", u"\u3042", 3);
TestWordToHyphenate(u" ( \U00020B9F. ).", u"\U00020B9F", 3);
}
#endif
TEST_F(HyphenationTest, LeadingSpaces) {
scoped_refptr<Hyphenation> hyphenation = GetHyphenation("en-us");
#if defined(OS_ANDROID)
// Hyphenation is available only for Android M MR1 or later.
if (!hyphenation)
return;
#endif
ASSERT_TRUE(hyphenation) << "Cannot find the hyphenation for en-us";
String leading_space(" principle");
EXPECT_THAT(hyphenation->HyphenLocations(leading_space), ElementsAre(7, 5));
EXPECT_EQ(5u, hyphenation->LastHyphenLocation(leading_space, 6));
String multi_leading_spaces(" principle");
EXPECT_THAT(hyphenation->HyphenLocations(multi_leading_spaces),
ElementsAre(9, 7));
EXPECT_EQ(7u, hyphenation->LastHyphenLocation(multi_leading_spaces, 8));
// Line breaker is not supposed to pass only spaces, no locations.
String only_spaces(" ");
EXPECT_THAT(hyphenation->HyphenLocations(only_spaces), ElementsAre());
EXPECT_EQ(0u, hyphenation->LastHyphenLocation(only_spaces, 3));
}
TEST_F(HyphenationTest, English) {
scoped_refptr<Hyphenation> hyphenation = GetHyphenation("en-us");
#if defined(OS_ANDROID)
// Hyphenation is available only for Android M MR1 or later.
if (!hyphenation)
return;
#endif
ASSERT_TRUE(hyphenation) << "Cannot find the hyphenation for en-us";
Vector<wtf_size_t, 8> locations = hyphenation->HyphenLocations("hyphenation");
EXPECT_THAT(locations, testing::AnyOf(ElementsAreArray({6, 2}),
ElementsAreArray({7, 6, 2})));
}
TEST_F(HyphenationTest, German) {
scoped_refptr<Hyphenation> hyphenation = GetHyphenation("de-1996");
#if defined(OS_ANDROID)
// Hyphenation is available only for Android M MR1 or later.
if (!hyphenation)
return;
#endif
ASSERT_TRUE(hyphenation) << "Cannot find the hyphenation for de-1996";
Vector<wtf_size_t, 8> locations =
hyphenation->HyphenLocations("konsonantien");
EXPECT_THAT(locations, ElementsAreArray({8, 5, 3}));
// Test words with non-ASCII (> U+0080) characters.
locations = hyphenation->HyphenLocations(
"B"
"\xE4" // LATIN SMALL LETTER A WITH DIAERESIS
"chlein");
EXPECT_THAT(locations, ElementsAreArray({4}));
}
#endif
} // namespace blink
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