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https://github.com/tesseract-ocr/tesseract.git
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111 lines
4.0 KiB
C++
111 lines
4.0 KiB
C++
// (C) Copyright 2017, Google Inc.
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "ligature_table.h"
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#include "commandlineflags.h"
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#include "fileio.h"
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#include "include_gunit.h"
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#include "pango_font_info.h"
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namespace tesseract {
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#if 0 // not with NFC normalization
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const char kEngNonLigatureText[] = "fidelity effigy ſteep";
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// Same as above text, but with "fi" in the first word and "ffi" in the second
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// word replaced with their respective ligatures.
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const char kEngLigatureText[] = "fidelity effigy ſteep";
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// Same as kEngLigatureText but with "fi" in both words replaced with their
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// ligature. The test Verdana font does not support the "ffi" or "ſt" ligature.
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const char kRenderableEngLigatureText[] = "fidelity effigy ſteep";
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#endif
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static PangoFontMap *font_map;
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class LigatureTableTest : public ::testing::Test {
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protected:
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void SetUp() override {
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lig_table_ = LigatureTable::Get();
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if (!font_map) {
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font_map = pango_cairo_font_map_new_for_font_type(CAIRO_FONT_TYPE_FT);
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}
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pango_cairo_font_map_set_default(PANGO_CAIRO_FONT_MAP(font_map));
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}
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static void SetUpTestCase() {
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static std::locale system_locale("");
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std::locale::global(system_locale);
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FLAGS_fonts_dir = TESTING_DIR;
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FLAGS_fontconfig_tmpdir = FLAGS_test_tmpdir;
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file::MakeTmpdir();
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PangoFontInfo::SoftInitFontConfig(); // init early
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}
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LigatureTable *lig_table_;
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};
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TEST_F(LigatureTableTest, DoesFillLigatureTables) {
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EXPECT_GT(lig_table_->norm_to_lig_table().size(), 0);
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EXPECT_GT(lig_table_->lig_to_norm_table().size(), 0);
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}
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#if 0 // not with NFC normalization
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TEST_F(LigatureTableTest, DoesAddLigatures) {
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EXPECT_STREQ(kEngLigatureText, lig_table_->AddLigatures(kEngNonLigatureText, nullptr).c_str());
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}
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TEST_F(LigatureTableTest, DoesAddLigaturesWithSupportedFont) {
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PangoFontInfo font;
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EXPECT_TRUE(font.ParseFontDescriptionName("Verdana"));
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printf("1:%s\n", kRenderableEngLigatureText);
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printf("2:%s\n", lig_table_->AddLigatures(kEngNonLigatureText, &font).c_str());
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EXPECT_STREQ(kRenderableEngLigatureText,
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lig_table_->AddLigatures(kEngNonLigatureText, &font).c_str());
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}
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TEST_F(LigatureTableTest, DoesNotAddLigaturesWithUnsupportedFont) {
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PangoFontInfo font;
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EXPECT_TRUE(font.ParseFontDescriptionName("Lohit Hindi"));
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EXPECT_STREQ(kEngNonLigatureText, lig_table_->AddLigatures(kEngNonLigatureText, &font).c_str());
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}
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TEST_F(LigatureTableTest, DoesRemoveLigatures) {
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EXPECT_STREQ(kEngNonLigatureText, lig_table_->RemoveLigatures(kEngLigatureText).c_str());
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}
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#endif
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TEST_F(LigatureTableTest, TestCustomLigatures) {
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const char *kTestCases[] = {
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"act", "a\uE003", "publiſh", "publi\uE006", "ſince",
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"\uE007nce", "aſleep", "a\uE008eep", "neceſſary", "nece\uE009ary",
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};
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for (size_t i = 0; i < countof(kTestCases); i += 2) {
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EXPECT_STREQ(kTestCases[i + 1], lig_table_->AddLigatures(kTestCases[i], nullptr).c_str());
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EXPECT_STREQ(kTestCases[i], lig_table_->RemoveLigatures(kTestCases[i + 1]).c_str());
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EXPECT_STREQ(kTestCases[i], lig_table_->RemoveCustomLigatures(kTestCases[i + 1]).c_str());
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}
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}
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#if 0 // not with NFC normalization
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TEST_F(LigatureTableTest, TestRemovesCustomLigatures) {
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const char *kTestCases[] = {
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"fiction",
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"fi\uE003ion",
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"fiction",
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};
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for (size_t i = 0; i < countof(kTestCases); i += 3) {
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EXPECT_STREQ(kTestCases[i + 1], lig_table_->AddLigatures(kTestCases[i], nullptr).c_str());
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EXPECT_STREQ(kTestCases[i + 2], lig_table_->RemoveCustomLigatures(kTestCases[i + 1]).c_str());
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}
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}
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#endif
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} // namespace tesseract
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