summaryrefslogtreecommitdiff
path: root/fpdfsdk/src/fpdftext_embeddertest.cpp
blob: 6c1ae4ceb8853591a2e9f67d6798f822f7348142 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
// 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 "public/fpdf_text.h"
#include "public/fpdfview.h"
#include "testing/embedder_test.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace {

static 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_NE(nullptr, page);

  FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page);
  EXPECT_NE(nullptr, 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, 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_NE(nullptr, page);

  FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page);
  EXPECT_NE(nullptr, textpage);

  // Avoid issues with system wchar_t width vs. FPDF_WideString.
  const unsigned short nope[] = {'n', 'o', 'p', 'e', '\0'};
  const unsigned short world[] = {'w', 'o', 'r', 'l', 'd', '\0'};
  const unsigned short world_caps[] = {'W', 'O', 'R', 'L', 'D', '\0'};
  const unsigned short world_substr[] = {'o', 'r', 'l', 'd', '\0'};

  // No occurences of "nope" in test page.
  FPDF_SCHHANDLE search = FPDFText_FindStart(textpage, nope, 0, 0);
  EXPECT_NE(nullptr, 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, 0, 2);
  EXPECT_NE(nullptr, 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,
                              FPDF_MATCHCASE | FPDF_MATCHWHOLEWORD, 0);
  EXPECT_NE(nullptr, 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, 0, 0);
  EXPECT_NE(nullptr, 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, 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, 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, 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_NE(nullptr, page);

  FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page);
  EXPECT_NE(nullptr, 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_NE(nullptr, page);

  FPDF_TEXTPAGE textpage = FPDFText_LoadPage(page);
  EXPECT_NE(nullptr, textpage);

  FPDF_PAGELINK pagelink = FPDFLink_LoadWebLinks(textpage);
  EXPECT_NE(nullptr, 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";
  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(
      sizeof(expected_url) - 1,
      FPDFLink_GetURL(pagelink, 0, fixed_buffer, sizeof(expected_url) - 1));
  EXPECT_TRUE(check_unsigned_shorts(expected_url, fixed_buffer,
                                    sizeof(expected_url) - 1));
  EXPECT_EQ(0xbdbd, fixed_buffer[sizeof(expected_url) - 1]);

  // Retreive link with exactly-sized buffer.
  memset(fixed_buffer, 0xbd, sizeof(fixed_buffer));
  EXPECT_EQ(sizeof(expected_url),
            FPDFLink_GetURL(pagelink, 0, fixed_buffer, sizeof(expected_url)));
  EXPECT_TRUE(
      check_unsigned_shorts(expected_url, fixed_buffer, sizeof(expected_url)));
  EXPECT_EQ(0u, fixed_buffer[sizeof(expected_url) - 1]);
  EXPECT_EQ(0xbdbd, fixed_buffer[sizeof(expected_url)]);

  // Retreive link with ample-sized-buffer.
  memset(fixed_buffer, 0xbd, sizeof(fixed_buffer));
  EXPECT_EQ(sizeof(expected_url),
            FPDFLink_GetURL(pagelink, 0, fixed_buffer, 128));
  EXPECT_TRUE(
      check_unsigned_shorts(expected_url, fixed_buffer, sizeof(expected_url)));
  EXPECT_EQ(0u, fixed_buffer[sizeof(expected_url) - 1]);
  EXPECT_EQ(0xbdbd, fixed_buffer[sizeof(expected_url)]);

  // 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);
}