fpdfsdk/fpdftext_embeddertest.cpp - platform/external/pdfium - Gitiles

 // 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 "core/fxcrt/include/fx_basic.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 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;
   }

   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);

   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, 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);
 }
	// 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 "core/fxcrt/include/fx_basic.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 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;
	}

	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);

	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, 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);
	}