// Copyright 2015 PDFium 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 <memory> #include "core/fxcrt/fx_memory.h" #include "public/fpdf_text.h" #include "public/fpdfview.h" #include "testing/embedder_test.h" #include "testing/gtest/include/gtest/gtest.h" #include "testing/test_support.h" namespace { bool check_unsigned_shorts(const char* expected, const unsigned short* actual, size_t length) { if (length > strlen(expected) + 1) return false; for (size_t i = 0; i < length; ++i) { if (actual[i] != static_cast<unsigned short>(expected[i])) return false; } return true; } } // namespace class FPDFTextEmbeddertest : public EmbedderTest {}; TEST_F(FPDFTextEmbeddertest, Text) { EXPECT_TRUE(OpenDocument("hello_world.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); static const char expected[] = "Hello, world!\r\nGoodbye, world!"; unsigned short fixed_buffer[128]; memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); // Check that unreasonable inputs are handled gracefully EXPECT_EQ(0, FPDFText_GetText(textpage, 0, 128, nullptr)); EXPECT_EQ(0, FPDFText_GetText(textpage, -1, 128, fixed_buffer)); EXPECT_EQ(0, FPDFText_GetText(textpage, 0, 0, fixed_buffer)); EXPECT_EQ(0, FPDFText_GetText(textpage, 0, -1, fixed_buffer)); // Check includes the terminating NUL that is provided. int num_chars = FPDFText_GetText(textpage, 0, 128, fixed_buffer); ASSERT_GE(num_chars, 0); EXPECT_EQ(sizeof(expected), static_cast<size_t>(num_chars)); EXPECT_TRUE(check_unsigned_shorts(expected, fixed_buffer, sizeof(expected))); // Count does not include the terminating NUL in the string literal. EXPECT_EQ(sizeof(expected) - 1, static_cast<size_t>(FPDFText_CountChars(textpage))); for (size_t i = 0; i < sizeof(expected) - 1; ++i) { EXPECT_EQ(static_cast<unsigned int>(expected[i]), FPDFText_GetUnicode(textpage, i)) << " at " << i; } // Extracting using a buffer that will be completely filled. Small buffer is // 12 elements long, since it will need 2 locations per displayed character in // the expected string, plus 2 more for the terminating character. static const char small_expected[] = "Hello"; unsigned short small_buffer[12]; memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(6, FPDFText_GetText(textpage, 0, 6, small_buffer)); EXPECT_TRUE(check_unsigned_shorts(small_expected, small_buffer, sizeof(small_expected))); EXPECT_EQ(12.0, FPDFText_GetFontSize(textpage, 0)); EXPECT_EQ(16.0, FPDFText_GetFontSize(textpage, 15)); double left = 0.0; double right = 0.0; double bottom = 0.0; double top = 0.0; FPDFText_GetCharBox(textpage, 4, &left, &right, &bottom, &top); EXPECT_NEAR(41.071, left, 0.001); EXPECT_NEAR(46.243, right, 0.001); EXPECT_NEAR(49.844, bottom, 0.001); EXPECT_NEAR(55.520, top, 0.001); double x = 0.0; double y = 0.0; EXPECT_TRUE(FPDFText_GetCharOrigin(textpage, 4, &x, &y)); EXPECT_NEAR(40.664, x, 0.001); EXPECT_NEAR(50.000, y, 0.001); EXPECT_EQ(4, FPDFText_GetCharIndexAtPos(textpage, 42.0, 50.0, 1.0, 1.0)); EXPECT_EQ(-1, FPDFText_GetCharIndexAtPos(textpage, 0.0, 0.0, 1.0, 1.0)); EXPECT_EQ(-1, FPDFText_GetCharIndexAtPos(textpage, 199.0, 199.0, 1.0, 1.0)); // Test out of range indicies. EXPECT_EQ(-1, FPDFText_GetCharIndexAtPos(textpage, 42.0, 10000000.0, 1.0, 1.0)); EXPECT_EQ(-1, FPDFText_GetCharIndexAtPos(textpage, -1.0, 50.0, 1.0, 1.0)); // Count does not include the terminating NUL in the string literal. EXPECT_EQ(2, FPDFText_CountRects(textpage, 0, sizeof(expected) - 1)); left = 0.0; right = 0.0; bottom = 0.0; top = 0.0; FPDFText_GetRect(textpage, 1, &left, &top, &right, &bottom); EXPECT_NEAR(20.847, left, 0.001); EXPECT_NEAR(135.167, right, 0.001); EXPECT_NEAR(96.655, bottom, 0.001); EXPECT_NEAR(116.000, top, 0.001); // Test out of range indicies set outputs to (0.0, 0.0, 0.0, 0.0). left = -1.0; right = -1.0; bottom = -1.0; top = -1.0; FPDFText_GetRect(textpage, -1, &left, &top, &right, &bottom); EXPECT_EQ(0.0, left); EXPECT_EQ(0.0, right); EXPECT_EQ(0.0, bottom); EXPECT_EQ(0.0, top); left = -2.0; right = -2.0; bottom = -2.0; top = -2.0; FPDFText_GetRect(textpage, 2, &left, &top, &right, &bottom); EXPECT_EQ(0.0, left); EXPECT_EQ(0.0, right); EXPECT_EQ(0.0, bottom); EXPECT_EQ(0.0, top); EXPECT_EQ(9, FPDFText_GetBoundedText(textpage, 41.0, 56.0, 82.0, 48.0, 0, 0)); // Extract starting at character 4 as above. memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(1, FPDFText_GetBoundedText(textpage, 41.0, 56.0, 82.0, 48.0, fixed_buffer, 1)); EXPECT_TRUE(check_unsigned_shorts(expected + 4, fixed_buffer, 1)); EXPECT_EQ(0xbdbd, fixed_buffer[1]); memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(9, FPDFText_GetBoundedText(textpage, 41.0, 56.0, 82.0, 48.0, fixed_buffer, 9)); EXPECT_TRUE(check_unsigned_shorts(expected + 4, fixed_buffer, 9)); EXPECT_EQ(0xbdbd, fixed_buffer[9]); memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(10, FPDFText_GetBoundedText(textpage, 41.0, 56.0, 82.0, 48.0, fixed_buffer, 128)); EXPECT_TRUE(check_unsigned_shorts(expected + 4, fixed_buffer, 9)); EXPECT_EQ(0u, fixed_buffer[9]); EXPECT_EQ(0xbdbd, fixed_buffer[10]); FPDFText_ClosePage(textpage); UnloadPage(page); } TEST_F(FPDFTextEmbeddertest, TextSearch) { EXPECT_TRUE(OpenDocument("hello_world.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); std::unique_ptr<unsigned short, pdfium::FreeDeleter> nope = GetFPDFWideString(L"nope"); std::unique_ptr<unsigned short, pdfium::FreeDeleter> world = GetFPDFWideString(L"world"); std::unique_ptr<unsigned short, pdfium::FreeDeleter> world_caps = GetFPDFWideString(L"WORLD"); std::unique_ptr<unsigned short, pdfium::FreeDeleter> world_substr = GetFPDFWideString(L"orld"); // No occurences of "nope" in test page. FPDF_SCHHANDLE search = FPDFText_FindStart(textpage, nope.get(), 0, 0); EXPECT_TRUE(search); EXPECT_EQ(0, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(0, FPDFText_GetSchCount(search)); // Advancing finds nothing. EXPECT_FALSE(FPDFText_FindNext(search)); EXPECT_EQ(0, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(0, FPDFText_GetSchCount(search)); // Retreating finds nothing. EXPECT_FALSE(FPDFText_FindPrev(search)); EXPECT_EQ(0, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(0, FPDFText_GetSchCount(search)); FPDFText_FindClose(search); // Two occurences of "world" in test page. search = FPDFText_FindStart(textpage, world.get(), 0, 2); EXPECT_TRUE(search); // Remains not found until advanced. EXPECT_EQ(0, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(0, FPDFText_GetSchCount(search)); // First occurence of "world" in this test page. EXPECT_TRUE(FPDFText_FindNext(search)); EXPECT_EQ(7, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); // Last occurence of "world" in this test page. EXPECT_TRUE(FPDFText_FindNext(search)); EXPECT_EQ(24, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); // Found position unchanged when fails to advance. EXPECT_FALSE(FPDFText_FindNext(search)); EXPECT_EQ(24, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); // Back to first occurence. EXPECT_TRUE(FPDFText_FindPrev(search)); EXPECT_EQ(7, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); // Found position unchanged when fails to retreat. EXPECT_FALSE(FPDFText_FindPrev(search)); EXPECT_EQ(7, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); FPDFText_FindClose(search); // Exact search unaffected by case sensitiity and whole word flags. search = FPDFText_FindStart(textpage, world.get(), FPDF_MATCHCASE | FPDF_MATCHWHOLEWORD, 0); EXPECT_TRUE(search); EXPECT_TRUE(FPDFText_FindNext(search)); EXPECT_EQ(7, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); FPDFText_FindClose(search); // Default is case-insensitive, so matching agaist caps works. search = FPDFText_FindStart(textpage, world_caps.get(), 0, 0); EXPECT_TRUE(search); EXPECT_TRUE(FPDFText_FindNext(search)); EXPECT_EQ(7, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(5, FPDFText_GetSchCount(search)); FPDFText_FindClose(search); // But can be made case sensitive, in which case this fails. search = FPDFText_FindStart(textpage, world_caps.get(), FPDF_MATCHCASE, 0); EXPECT_FALSE(FPDFText_FindNext(search)); EXPECT_EQ(0, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(0, FPDFText_GetSchCount(search)); FPDFText_FindClose(search); // Default is match anywhere within word, so matching substirng works. search = FPDFText_FindStart(textpage, world_substr.get(), 0, 0); EXPECT_TRUE(FPDFText_FindNext(search)); EXPECT_EQ(8, FPDFText_GetSchResultIndex(search)); EXPECT_EQ(4, FPDFText_GetSchCount(search)); FPDFText_FindClose(search); // But can be made to mach word boundaries, in which case this fails. search = FPDFText_FindStart(textpage, world_substr.get(), FPDF_MATCHWHOLEWORD, 0); EXPECT_FALSE(FPDFText_FindNext(search)); // TODO(tsepez): investigate strange index/count values in this state. FPDFText_FindClose(search); FPDFText_ClosePage(textpage); UnloadPage(page); } // Test that the page has characters despite a bad stream length. TEST_F(FPDFTextEmbeddertest, StreamLengthPastEndOfFile) { EXPECT_TRUE(OpenDocument("bug_57.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); EXPECT_EQ(13, FPDFText_CountChars(textpage)); FPDFText_ClosePage(textpage); UnloadPage(page); } TEST_F(FPDFTextEmbeddertest, WebLinks) { EXPECT_TRUE(OpenDocument("weblinks.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); FPDF_PAGELINK pagelink = FPDFLink_LoadWebLinks(textpage); EXPECT_TRUE(pagelink); // Page contains two HTTP-style URLs. EXPECT_EQ(2, FPDFLink_CountWebLinks(pagelink)); // Only a terminating NUL required for bogus links. EXPECT_EQ(1, FPDFLink_GetURL(pagelink, 2, nullptr, 0)); EXPECT_EQ(1, FPDFLink_GetURL(pagelink, 1400, nullptr, 0)); EXPECT_EQ(1, FPDFLink_GetURL(pagelink, -1, nullptr, 0)); // Query the number of characters required for each link (incl NUL). EXPECT_EQ(25, FPDFLink_GetURL(pagelink, 0, nullptr, 0)); EXPECT_EQ(26, FPDFLink_GetURL(pagelink, 1, nullptr, 0)); static const char expected_url[] = "http://example.com?q=foo"; static const size_t expected_len = sizeof(expected_url); unsigned short fixed_buffer[128]; // Retrieve a link with too small a buffer. Buffer will not be // NUL-terminated, but must not be modified past indicated length, // so pre-fill with a pattern to check write bounds. memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(1, FPDFLink_GetURL(pagelink, 0, fixed_buffer, 1)); EXPECT_TRUE(check_unsigned_shorts(expected_url, fixed_buffer, 1)); EXPECT_EQ(0xbdbd, fixed_buffer[1]); // Check buffer that doesn't have space for a terminating NUL. memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(static_cast<int>(expected_len - 1), FPDFLink_GetURL(pagelink, 0, fixed_buffer, expected_len - 1)); EXPECT_TRUE( check_unsigned_shorts(expected_url, fixed_buffer, expected_len - 1)); EXPECT_EQ(0xbdbd, fixed_buffer[expected_len - 1]); // Retreive link with exactly-sized buffer. memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(static_cast<int>(expected_len), FPDFLink_GetURL(pagelink, 0, fixed_buffer, expected_len)); EXPECT_TRUE(check_unsigned_shorts(expected_url, fixed_buffer, expected_len)); EXPECT_EQ(0u, fixed_buffer[expected_len - 1]); EXPECT_EQ(0xbdbd, fixed_buffer[expected_len]); // Retreive link with ample-sized-buffer. memset(fixed_buffer, 0xbd, sizeof(fixed_buffer)); EXPECT_EQ(static_cast<int>(expected_len), FPDFLink_GetURL(pagelink, 0, fixed_buffer, 128)); EXPECT_TRUE(check_unsigned_shorts(expected_url, fixed_buffer, expected_len)); EXPECT_EQ(0u, fixed_buffer[expected_len - 1]); EXPECT_EQ(0xbdbd, fixed_buffer[expected_len]); // Each link rendered in a single rect in this test page. EXPECT_EQ(1, FPDFLink_CountRects(pagelink, 0)); EXPECT_EQ(1, FPDFLink_CountRects(pagelink, 1)); // Each link rendered in a single rect in this test page. EXPECT_EQ(0, FPDFLink_CountRects(pagelink, -1)); EXPECT_EQ(0, FPDFLink_CountRects(pagelink, 2)); EXPECT_EQ(0, FPDFLink_CountRects(pagelink, 10000)); // Check boundary of valid link index with valid rect index. double left = 0.0; double right = 0.0; double top = 0.0; double bottom = 0.0; FPDFLink_GetRect(pagelink, 0, 0, &left, &top, &right, &bottom); EXPECT_NEAR(50.791, left, 0.001); EXPECT_NEAR(187.963, right, 0.001); EXPECT_NEAR(97.624, bottom, 0.001); EXPECT_NEAR(108.736, top, 0.001); // Check that valid link with invalid rect index leaves parameters unchanged. left = -1.0; right = -1.0; top = -1.0; bottom = -1.0; FPDFLink_GetRect(pagelink, 0, 1, &left, &top, &right, &bottom); EXPECT_EQ(-1.0, left); EXPECT_EQ(-1.0, right); EXPECT_EQ(-1.0, bottom); EXPECT_EQ(-1.0, top); // Check that invalid link index leaves parameters unchanged. left = -2.0; right = -2.0; top = -2.0; bottom = -2.0; FPDFLink_GetRect(pagelink, -1, 0, &left, &top, &right, &bottom); EXPECT_EQ(-2.0, left); EXPECT_EQ(-2.0, right); EXPECT_EQ(-2.0, bottom); EXPECT_EQ(-2.0, top); FPDFLink_CloseWebLinks(pagelink); FPDFText_ClosePage(textpage); UnloadPage(page); } TEST_F(FPDFTextEmbeddertest, WebLinksAcrossLines) { EXPECT_TRUE(OpenDocument("weblinks_across_lines.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); FPDF_PAGELINK pagelink = FPDFLink_LoadWebLinks(textpage); EXPECT_TRUE(pagelink); static const char* const kExpectedUrls[] = { "http://example.com", // from "http://www.example.com?\r\nfoo" "http://example.com/", // from "http://www.example.com/\r\nfoo" "http://example.com/test-foo", // from "http://example.com/test-\r\nfoo" "http://abc.com/test-foo", // from "http://abc.com/test-\r\n\r\nfoo" // Next two links from "http://www.example.com/\r\nhttp://www.abc.com/" "http://example.com/", "http://www.abc.com", }; static const int kNumLinks = static_cast<int>(FX_ArraySize(kExpectedUrls)); EXPECT_EQ(kNumLinks, FPDFLink_CountWebLinks(pagelink)); unsigned short fixed_buffer[128]; for (int i = 0; i < kNumLinks; i++) { const size_t expected_len = strlen(kExpectedUrls[i]) + 1; memset(fixed_buffer, 0, FX_ArraySize(fixed_buffer)); EXPECT_EQ(static_cast<int>(expected_len), FPDFLink_GetURL(pagelink, i, nullptr, 0)); EXPECT_EQ( static_cast<int>(expected_len), FPDFLink_GetURL(pagelink, i, fixed_buffer, FX_ArraySize(fixed_buffer))); EXPECT_TRUE( check_unsigned_shorts(kExpectedUrls[i], fixed_buffer, expected_len)); } FPDFLink_CloseWebLinks(pagelink); FPDFText_ClosePage(textpage); UnloadPage(page); } TEST_F(FPDFTextEmbeddertest, WebLinksAcrossLinesBug) { EXPECT_TRUE(OpenDocument("bug_650.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); FPDF_PAGELINK pagelink = FPDFLink_LoadWebLinks(textpage); EXPECT_TRUE(pagelink); EXPECT_EQ(2, FPDFLink_CountWebLinks(pagelink)); unsigned short fixed_buffer[128] = {0}; static const char kExpectedUrl[] = "http://tutorial45.com/learn-autocad-basics-day-166/"; static const int kUrlSize = static_cast<int>(sizeof(kExpectedUrl)); EXPECT_EQ(kUrlSize, FPDFLink_GetURL(pagelink, 1, nullptr, 0)); EXPECT_EQ(kUrlSize, FPDFLink_GetURL(pagelink, 1, fixed_buffer, FX_ArraySize(fixed_buffer))); EXPECT_TRUE(check_unsigned_shorts(kExpectedUrl, fixed_buffer, kUrlSize)); FPDFLink_CloseWebLinks(pagelink); FPDFText_ClosePage(textpage); UnloadPage(page); } TEST_F(FPDFTextEmbeddertest, GetFontSize) { EXPECT_TRUE(OpenDocument("hello_world.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); const double kExpectedFontsSizes[] = {12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16}; int count = FPDFText_CountChars(textpage); ASSERT_EQ(FX_ArraySize(kExpectedFontsSizes), static_cast<size_t>(count)); for (int i = 0; i < count; ++i) EXPECT_EQ(kExpectedFontsSizes[i], FPDFText_GetFontSize(textpage, i)) << i; FPDFText_ClosePage(textpage); UnloadPage(page); } TEST_F(FPDFTextEmbeddertest, ToUnicode) { EXPECT_TRUE(OpenDocument("bug_583.pdf")); FPDF_PAGE page = LoadPage(0); EXPECT_TRUE(page); FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page); EXPECT_TRUE(textpage); ASSERT_EQ(1, FPDFText_CountChars(textpage)); EXPECT_EQ(static_cast<unsigned int>(0), FPDFText_GetUnicode(textpage, 0)); FPDFText_ClosePage(textpage); UnloadPage(page); }