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