/usr/lib/python3/dist-packages/PyPDF2/pdf.py is in python3-pypdf2 1.25.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257 2258 2259 2260 2261 2262 2263 2264 2265 2266 2267 2268 2269 2270 2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288 2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341 2342 2343 2344 2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441 2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523 2524 2525 2526 2527 2528 2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557 2558 2559 2560 2561 2562 2563 2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574 2575 2576 2577 2578 2579 2580 2581 2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592 2593 2594 2595 2596 2597 2598 2599 2600 2601 2602 2603 2604 2605 2606 2607 2608 2609 2610 2611 2612 2613 2614 2615 2616 2617 2618 2619 2620 2621 2622 2623 2624 2625 2626 2627 2628 2629 2630 2631 2632 2633 2634 2635 2636 2637 2638 2639 2640 2641 2642 2643 2644 2645 2646 2647 2648 2649 2650 2651 2652 2653 2654 2655 2656 2657 2658 2659 2660 2661 2662 2663 2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674 2675 2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721 2722 2723 2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778 2779 2780 2781 2782 2783 2784 2785 2786 2787 2788 2789 2790 2791 2792 2793 2794 2795 2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812 2813 2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825 2826 2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838 2839 2840 2841 2842 2843 2844 2845 2846 2847 2848 2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957 2958 2959 2960 2961 2962 2963 2964 2965 2966 2967 2968 2969 2970 2971 2972 | # -*- coding: utf-8 -*-
#
# vim: sw=4:expandtab:foldmethod=marker
#
# Copyright (c) 2006, Mathieu Fenniak
# Copyright (c) 2007, Ashish Kulkarni <kulkarni.ashish@gmail.com>
#
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions and the following disclaimer in the documentation
# and/or other materials provided with the distribution.
# * The name of the author may not be used to endorse or promote products
# derived from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
"""
A pure-Python PDF library with an increasing number of capabilities.
See README for links to FAQ, documentation, homepage, etc.
"""
__author__ = "Mathieu Fenniak"
__author_email__ = "biziqe@mathieu.fenniak.net"
__maintainer__ = "Phaseit, Inc."
__maintainer_email = "PyPDF2@phaseit.net"
import string
import math
import struct
import sys
from sys import version_info
if version_info < ( 3, 0 ):
from cStringIO import StringIO
else:
from io import StringIO
if version_info < ( 3, 0 ):
BytesIO = StringIO
else:
from io import BytesIO
from . import filters
from . import utils
import warnings
import codecs
from .generic import *
from .utils import readNonWhitespace, readUntilWhitespace, ConvertFunctionsToVirtualList
from .utils import isString, b_, u_, ord_, chr_, str_, formatWarning
if version_info < ( 2, 4 ):
from sets import ImmutableSet as frozenset
if version_info < ( 2, 5 ):
from md5 import md5
else:
from hashlib import md5
import uuid
class PdfFileWriter(object):
"""
This class supports writing PDF files out, given pages produced by another
class (typically :class:`PdfFileReader<PdfFileReader>`).
"""
def __init__(self):
self._header = b_("%PDF-1.3")
self._objects = [] # array of indirect objects
# The root of our page tree node.
pages = DictionaryObject()
pages.update({
NameObject("/Type"): NameObject("/Pages"),
NameObject("/Count"): NumberObject(0),
NameObject("/Kids"): ArrayObject(),
})
self._pages = self._addObject(pages)
# info object
info = DictionaryObject()
info.update({
NameObject("/Producer"): createStringObject(codecs.BOM_UTF16_BE + u_("PyPDF2").encode('utf-16be'))
})
self._info = self._addObject(info)
# root object
root = DictionaryObject()
root.update({
NameObject("/Type"): NameObject("/Catalog"),
NameObject("/Pages"): self._pages,
})
self._root = None
self._root_object = root
def _addObject(self, obj):
self._objects.append(obj)
return IndirectObject(len(self._objects), 0, self)
def getObject(self, ido):
if ido.pdf != self:
raise ValueError("pdf must be self")
return self._objects[ido.idnum - 1]
def _addPage(self, page, action):
assert page["/Type"] == "/Page"
page[NameObject("/Parent")] = self._pages
page = self._addObject(page)
pages = self.getObject(self._pages)
action(pages["/Kids"], page)
pages[NameObject("/Count")] = NumberObject(pages["/Count"] + 1)
def addPage(self, page):
"""
Adds a page to this PDF file. The page is usually acquired from a
:class:`PdfFileReader<PdfFileReader>` instance.
:param PageObject page: The page to add to the document. Should be
an instance of :class:`PageObject<PyPDF2.pdf.PageObject>`
"""
self._addPage(page, list.append)
def insertPage(self, page, index=0):
"""
Insert a page in this PDF file. The page is usually acquired from a
:class:`PdfFileReader<PdfFileReader>` instance.
:param PageObject page: The page to add to the document. This
argument should be an instance of :class:`PageObject<pdf.PageObject>`.
:param int index: Position at which the page will be inserted.
"""
self._addPage(page, lambda l, p: l.insert(index, p))
def getPage(self, pageNumber):
"""
Retrieves a page by number from this PDF file.
:param int pageNumber: The page number to retrieve
(pages begin at zero)
:return: the page at the index given by *pageNumber*
:rtype: :class:`PageObject<pdf.PageObject>`
"""
pages = self.getObject(self._pages)
# XXX: crude hack
return pages["/Kids"][pageNumber].getObject()
def getNumPages(self):
"""
:return: the number of pages.
:rtype: int
"""
pages = self.getObject(self._pages)
return int(pages[NameObject("/Count")])
def addBlankPage(self, width=None, height=None):
"""
Appends a blank page to this PDF file and returns it. If no page size
is specified, use the size of the last page.
:param float width: The width of the new page expressed in default user
space units.
:param float height: The height of the new page expressed in default
user space units.
:return: the newly appended page
:rtype: :class:`PageObject<PyPDF2.pdf.PageObject>`
:raises PageSizeNotDefinedError: if width and height are not defined
and previous page does not exist.
"""
page = PageObject.createBlankPage(self, width, height)
self.addPage(page)
return page
def insertBlankPage(self, width=None, height=None, index=0):
"""
Inserts a blank page to this PDF file and returns it. If no page size
is specified, use the size of the last page.
:param float width: The width of the new page expressed in default user
space units.
:param float height: The height of the new page expressed in default
user space units.
:param int index: Position to add the page.
:return: the newly appended page
:rtype: :class:`PageObject<PyPDF2.pdf.PageObject>`
:raises PageSizeNotDefinedError: if width and height are not defined
and previous page does not exist.
"""
if width is None or height is None and \
(self.getNumPages() - 1) >= index:
oldpage = self.getPage(index)
width = oldpage.mediaBox.getWidth()
height = oldpage.mediaBox.getHeight()
page = PageObject.createBlankPage(self, width, height)
self.insertPage(page, index)
return page
def addJS(self, javascript):
"""
Add Javascript which will launch upon opening this PDF.
:param str javascript: Your Javascript.
>>> output.addJS("this.print({bUI:true,bSilent:false,bShrinkToFit:true});")
# Example: This will launch the print window when the PDF is opened.
"""
js = DictionaryObject()
js.update({
NameObject("/Type"): NameObject("/Action"),
NameObject("/S"): NameObject("/JavaScript"),
NameObject("/JS"): NameObject("(%s)" % javascript)
})
self._root_object.update({
NameObject("/OpenAction"): self._addObject(js)
})
def addAttachment(self, fname, fdata):
"""
Embed a file inside the PDF.
:param str fname: The filename to display.
:param str fdata: The data in the file.
Reference:
https://www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/PDF32000_2008.pdf
Section 7.11.3
"""
# We need 3 entries:
# * The file's data
# * The /Filespec entry
# * The file's name, which goes in the Catalog
# The entry for the file
""" Sample:
8 0 obj
<<
/Length 12
/Type /EmbeddedFile
>>
stream
Hello world!
endstream
endobj
"""
file_entry = DecodedStreamObject()
file_entry.setData(fdata)
file_entry.update({
NameObject("/Type"): NameObject("/EmbeddedFile")
})
# The Filespec entry
""" Sample:
7 0 obj
<<
/Type /Filespec
/F (hello.txt)
/EF << /F 8 0 R >>
>>
"""
efEntry = DictionaryObject()
efEntry.update({ NameObject("/F"):file_entry })
filespec = DictionaryObject()
filespec.update({
NameObject("/Type"): NameObject("/Filespec"),
NameObject("/F"): createStringObject(fname), # Perhaps also try TextStringObject
NameObject("/EF"): efEntry
})
# Then create the entry for the root, as it needs a reference to the Filespec
""" Sample:
1 0 obj
<<
/Type /Catalog
/Outlines 2 0 R
/Pages 3 0 R
/Names << /EmbeddedFiles << /Names [(hello.txt) 7 0 R] >> >>
>>
endobj
"""
embeddedFilesNamesDictionary = DictionaryObject()
embeddedFilesNamesDictionary.update({
NameObject("/Names"): ArrayObject([createStringObject(fname), filespec])
})
embeddedFilesDictionary = DictionaryObject()
embeddedFilesDictionary.update({
NameObject("/EmbeddedFiles"): embeddedFilesNamesDictionary
})
# Update the root
self._root_object.update({
NameObject("/Names"): embeddedFilesDictionary
})
def appendPagesFromReader(self, reader, after_page_append=None):
"""
Copy pages from reader to writer. Includes an optional callback parameter
which is invoked after pages are appended to the writer.
:param reader: a PdfFileReader object from which to copy page
annotations to this writer object. The writer's annots
will then be updated
:callback after_page_append (function): Callback function that is invoked after
each page is appended to the writer. Callback signature:
:param writer_pageref (PDF page reference): Reference to the page
appended to the writer.
"""
# Get page count from writer and reader
reader_num_pages = reader.getNumPages()
writer_num_pages = self.getNumPages()
# Copy pages from reader to writer
for rpagenum in range(0, reader_num_pages):
reader_page = reader.getPage(rpagenum)
self.addPage(reader_page)
writer_page = self.getPage(writer_num_pages+rpagenum)
# Trigger callback, pass writer page as parameter
if callable(after_page_append): after_page_append(writer_page)
def updatePageFormFieldValues(self, page, fields):
'''
Update the form field values for a given page from a fields dictionary.
Copy field texts and values from fields to page.
:param page: Page reference from PDF writer where the annotations
and field data will be updated.
:param fields: a Python dictionary of field names (/T) and text
values (/V)
'''
# Iterate through pages, update field values
for j in range(0, len(page['/Annots'])):
writer_annot = page['/Annots'][j].getObject()
for field in fields:
if writer_annot.get('/T') == field:
writer_annot.update({
NameObject("/V"): TextStringObject(fields[field])
})
def cloneReaderDocumentRoot(self, reader):
'''
Copy the reader document root to the writer.
:param reader: PdfFileReader from the document root should be copied.
:callback after_page_append
'''
self._root_object = reader.trailer['/Root']
def cloneDocumentFromReader(self, reader, after_page_append=None):
'''
Create a copy (clone) of a document from a PDF file reader
:param reader: PDF file reader instance from which the clone
should be created.
:callback after_page_append (function): Callback function that is invoked after
each page is appended to the writer. Signature includes a reference to the
appended page (delegates to appendPagesFromReader). Callback signature:
:param writer_pageref (PDF page reference): Reference to the page just
appended to the document.
'''
self.cloneReaderDocumentRoot(reader)
self.appendPagesFromReader(reader, after_page_append)
def encrypt(self, user_pwd, owner_pwd = None, use_128bit = True):
"""
Encrypt this PDF file with the PDF Standard encryption handler.
:param str user_pwd: The "user password", which allows for opening
and reading the PDF file with the restrictions provided.
:param str owner_pwd: The "owner password", which allows for
opening the PDF files without any restrictions. By default,
the owner password is the same as the user password.
:param bool use_128bit: flag as to whether to use 128bit
encryption. When false, 40bit encryption will be used. By default,
this flag is on.
"""
import time, random
if owner_pwd == None:
owner_pwd = user_pwd
if use_128bit:
V = 2
rev = 3
keylen = int(128 / 8)
else:
V = 1
rev = 2
keylen = int(40 / 8)
# permit everything:
P = -1
O = ByteStringObject(_alg33(owner_pwd, user_pwd, rev, keylen))
ID_1 = ByteStringObject(md5(b_(repr(time.time()))).digest())
ID_2 = ByteStringObject(md5(b_(repr(random.random()))).digest())
self._ID = ArrayObject((ID_1, ID_2))
if rev == 2:
U, key = _alg34(user_pwd, O, P, ID_1)
else:
assert rev == 3
U, key = _alg35(user_pwd, rev, keylen, O, P, ID_1, False)
encrypt = DictionaryObject()
encrypt[NameObject("/Filter")] = NameObject("/Standard")
encrypt[NameObject("/V")] = NumberObject(V)
if V == 2:
encrypt[NameObject("/Length")] = NumberObject(keylen * 8)
encrypt[NameObject("/R")] = NumberObject(rev)
encrypt[NameObject("/O")] = ByteStringObject(O)
encrypt[NameObject("/U")] = ByteStringObject(U)
encrypt[NameObject("/P")] = NumberObject(P)
self._encrypt = self._addObject(encrypt)
self._encrypt_key = key
def write(self, stream):
"""
Writes the collection of pages added to this object out as a PDF file.
:param stream: An object to write the file to. The object must support
the write method and the tell method, similar to a file object.
"""
if hasattr(stream, 'mode') and 'b' not in stream.mode:
warnings.warn("File <%s> to write to is not in binary mode. It may not be written to correctly." % stream.name)
debug = False
import struct
if not self._root:
self._root = self._addObject(self._root_object)
externalReferenceMap = {}
# PDF objects sometimes have circular references to their /Page objects
# inside their object tree (for example, annotations). Those will be
# indirect references to objects that we've recreated in this PDF. To
# address this problem, PageObject's store their original object
# reference number, and we add it to the external reference map before
# we sweep for indirect references. This forces self-page-referencing
# trees to reference the correct new object location, rather than
# copying in a new copy of the page object.
for objIndex in range(len(self._objects)):
obj = self._objects[objIndex]
if isinstance(obj, PageObject) and obj.indirectRef != None:
data = obj.indirectRef
if data.pdf not in externalReferenceMap:
externalReferenceMap[data.pdf] = {}
if data.generation not in externalReferenceMap[data.pdf]:
externalReferenceMap[data.pdf][data.generation] = {}
externalReferenceMap[data.pdf][data.generation][data.idnum] = IndirectObject(objIndex + 1, 0, self)
self.stack = []
if debug: print(("ERM:", externalReferenceMap, "root:", self._root))
self._sweepIndirectReferences(externalReferenceMap, self._root)
del self.stack
# Begin writing:
object_positions = []
stream.write(self._header + b_("\n"))
for i in range(len(self._objects)):
idnum = (i + 1)
obj = self._objects[i]
object_positions.append(stream.tell())
stream.write(b_(str(idnum) + " 0 obj\n"))
key = None
if hasattr(self, "_encrypt") and idnum != self._encrypt.idnum:
pack1 = struct.pack("<i", i + 1)[:3]
pack2 = struct.pack("<i", 0)[:2]
key = self._encrypt_key + pack1 + pack2
assert len(key) == (len(self._encrypt_key) + 5)
md5_hash = md5(key).digest()
key = md5_hash[:min(16, len(self._encrypt_key) + 5)]
obj.writeToStream(stream, key)
stream.write(b_("\nendobj\n"))
# xref table
xref_location = stream.tell()
stream.write(b_("xref\n"))
stream.write(b_("0 %s\n" % (len(self._objects) + 1)))
stream.write(b_("%010d %05d f \n" % (0, 65535)))
for offset in object_positions:
stream.write(b_("%010d %05d n \n" % (offset, 0)))
# trailer
stream.write(b_("trailer\n"))
trailer = DictionaryObject()
trailer.update({
NameObject("/Size"): NumberObject(len(self._objects) + 1),
NameObject("/Root"): self._root,
NameObject("/Info"): self._info,
})
if hasattr(self, "_ID"):
trailer[NameObject("/ID")] = self._ID
if hasattr(self, "_encrypt"):
trailer[NameObject("/Encrypt")] = self._encrypt
trailer.writeToStream(stream, None)
# eof
stream.write(b_("\nstartxref\n%s\n%%%%EOF\n" % (xref_location)))
def addMetadata(self, infos):
"""
Add custom metadata to the output.
:param dict infos: a Python dictionary where each key is a field
and each value is your new metadata.
"""
args = {}
for key, value in list(infos.items()):
args[NameObject(key)] = createStringObject(value)
self.getObject(self._info).update(args)
def _sweepIndirectReferences(self, externMap, data):
debug = False
if debug: print((data, "TYPE", data.__class__.__name__))
if isinstance(data, DictionaryObject):
for key, value in list(data.items()):
origvalue = value
value = self._sweepIndirectReferences(externMap, value)
if isinstance(value, StreamObject):
# a dictionary value is a stream. streams must be indirect
# objects, so we need to change this value.
value = self._addObject(value)
data[key] = value
return data
elif isinstance(data, ArrayObject):
for i in range(len(data)):
value = self._sweepIndirectReferences(externMap, data[i])
if isinstance(value, StreamObject):
# an array value is a stream. streams must be indirect
# objects, so we need to change this value
value = self._addObject(value)
data[i] = value
return data
elif isinstance(data, IndirectObject):
# internal indirect references are fine
if data.pdf == self:
if data.idnum in self.stack:
return data
else:
self.stack.append(data.idnum)
realdata = self.getObject(data)
self._sweepIndirectReferences(externMap, realdata)
return data
else:
newobj = externMap.get(data.pdf, {}).get(data.generation, {}).get(data.idnum, None)
if newobj == None:
newobj = data.pdf.getObject(data)
self._objects.append(None) # placeholder
idnum = len(self._objects)
newobj_ido = IndirectObject(idnum, 0, self)
if data.pdf not in externMap:
externMap[data.pdf] = {}
if data.generation not in externMap[data.pdf]:
externMap[data.pdf][data.generation] = {}
externMap[data.pdf][data.generation][data.idnum] = newobj_ido
newobj = self._sweepIndirectReferences(externMap, newobj)
self._objects[idnum-1] = newobj
return newobj_ido
return newobj
else:
return data
def getReference(self, obj):
idnum = self._objects.index(obj) + 1
ref = IndirectObject(idnum, 0, self)
assert ref.getObject() == obj
return ref
def getOutlineRoot(self):
if '/Outlines' in self._root_object:
outline = self._root_object['/Outlines']
idnum = self._objects.index(outline) + 1
outlineRef = IndirectObject(idnum, 0, self)
assert outlineRef.getObject() == outline
else:
outline = TreeObject()
outline.update({ })
outlineRef = self._addObject(outline)
self._root_object[NameObject('/Outlines')] = outlineRef
return outline
def getNamedDestRoot(self):
if '/Names' in self._root_object and isinstance(self._root_object['/Names'], DictionaryObject):
names = self._root_object['/Names']
idnum = self._objects.index(names) + 1
namesRef = IndirectObject(idnum, 0, self)
assert namesRef.getObject() == names
if '/Dests' in names and isinstance(names['/Dests'], DictionaryObject):
dests = names['/Dests']
idnum = self._objects.index(dests) + 1
destsRef = IndirectObject(idnum, 0, self)
assert destsRef.getObject() == dests
if '/Names' in dests:
nd = dests['/Names']
else:
nd = ArrayObject()
dests[NameObject('/Names')] = nd
else:
dests = DictionaryObject()
destsRef = self._addObject(dests)
names[NameObject('/Dests')] = destsRef
nd = ArrayObject()
dests[NameObject('/Names')] = nd
else:
names = DictionaryObject()
namesRef = self._addObject(names)
self._root_object[NameObject('/Names')] = namesRef
dests = DictionaryObject()
destsRef = self._addObject(dests)
names[NameObject('/Dests')] = destsRef
nd = ArrayObject()
dests[NameObject('/Names')] = nd
return nd
def addBookmarkDestination(self, dest, parent=None):
destRef = self._addObject(dest)
outlineRef = self.getOutlineRoot()
if parent == None:
parent = outlineRef
parent = parent.getObject()
#print parent.__class__.__name__
parent.addChild(destRef, self)
return destRef
def addBookmarkDict(self, bookmark, parent=None):
bookmarkObj = TreeObject()
for k, v in list(bookmark.items()):
bookmarkObj[NameObject(str(k))] = v
bookmarkObj.update(bookmark)
if '/A' in bookmark:
action = DictionaryObject()
for k, v in list(bookmark['/A'].items()):
action[NameObject(str(k))] = v
actionRef = self._addObject(action)
bookmarkObj[NameObject('/A')] = actionRef
bookmarkRef = self._addObject(bookmarkObj)
outlineRef = self.getOutlineRoot()
if parent == None:
parent = outlineRef
parent = parent.getObject()
parent.addChild(bookmarkRef, self)
return bookmarkRef
def addBookmark(self, title, pagenum, parent=None, color=None, bold=False, italic=False, fit='/Fit', *args):
"""
Add a bookmark to this PDF file.
:param str title: Title to use for this bookmark.
:param int pagenum: Page number this bookmark will point to.
:param parent: A reference to a parent bookmark to create nested
bookmarks.
:param tuple color: Color of the bookmark as a red, green, blue tuple
from 0.0 to 1.0
:param bool bold: Bookmark is bold
:param bool italic: Bookmark is italic
:param str fit: The fit of the destination page. See
:meth:`addLink()<addLink>` for details.
"""
pageRef = self.getObject(self._pages)['/Kids'][pagenum]
action = DictionaryObject()
zoomArgs = []
for a in args:
if a is not None:
zoomArgs.append(NumberObject(a))
else:
zoomArgs.append(NullObject())
dest = Destination(NameObject("/"+title + " bookmark"), pageRef, NameObject(fit), *zoomArgs)
destArray = dest.getDestArray()
action.update({
NameObject('/D') : destArray,
NameObject('/S') : NameObject('/GoTo')
})
actionRef = self._addObject(action)
outlineRef = self.getOutlineRoot()
if parent == None:
parent = outlineRef
bookmark = TreeObject()
bookmark.update({
NameObject('/A'): actionRef,
NameObject('/Title'): createStringObject(title),
})
if color is not None:
bookmark.update({NameObject('/C'): ArrayObject([FloatObject(c) for c in color])})
format = 0
if italic:
format += 1
if bold:
format += 2
if format:
bookmark.update({NameObject('/F'): NumberObject(format)})
bookmarkRef = self._addObject(bookmark)
parent = parent.getObject()
parent.addChild(bookmarkRef, self)
return bookmarkRef
def addNamedDestinationObject(self, dest):
destRef = self._addObject(dest)
nd = self.getNamedDestRoot()
nd.extend([dest['/Title'], destRef])
return destRef
def addNamedDestination(self, title, pagenum):
pageRef = self.getObject(self._pages)['/Kids'][pagenum]
dest = DictionaryObject()
dest.update({
NameObject('/D') : ArrayObject([pageRef, NameObject('/FitH'), NumberObject(826)]),
NameObject('/S') : NameObject('/GoTo')
})
destRef = self._addObject(dest)
nd = self.getNamedDestRoot()
nd.extend([title, destRef])
return destRef
def removeLinks(self):
"""
Removes links and annotations from this output.
"""
pages = self.getObject(self._pages)['/Kids']
for page in pages:
pageRef = self.getObject(page)
if "/Annots" in pageRef:
del pageRef['/Annots']
def removeImages(self, ignoreByteStringObject=False):
"""
Removes images from this output.
:param bool ignoreByteStringObject: optional parameter
to ignore ByteString Objects.
"""
pages = self.getObject(self._pages)['/Kids']
for j in range(len(pages)):
page = pages[j]
pageRef = self.getObject(page)
content = pageRef['/Contents'].getObject()
if not isinstance(content, ContentStream):
content = ContentStream(content, pageRef)
_operations = []
seq_graphics = False
for operands, operator in content.operations:
if operator == b_('Tj'):
text = operands[0]
if ignoreByteStringObject:
if not isinstance(text, TextStringObject):
operands[0] = TextStringObject()
elif operator == b_("'"):
text = operands[0]
if ignoreByteStringObject:
if not isinstance(text, TextStringObject):
operands[0] = TextStringObject()
elif operator == b_('"'):
text = operands[2]
if ignoreByteStringObject:
if not isinstance(text, TextStringObject):
operands[2] = TextStringObject()
elif operator == b_("TJ"):
for i in range(len(operands[0])):
if ignoreByteStringObject:
if not isinstance(operands[0][i], TextStringObject):
operands[0][i] = TextStringObject()
if operator == b_('q'):
seq_graphics = True
if operator == b_('Q'):
seq_graphics = False
if seq_graphics:
if operator in [b_('cm'), b_('w'), b_('J'), b_('j'), b_('M'), b_('d'), b_('ri'), b_('i'),
b_('gs'), b_('W'), b_('b'), b_('s'), b_('S'), b_('f'), b_('F'), b_('n'), b_('m'), b_('l'),
b_('c'), b_('v'), b_('y'), b_('h'), b_('B'), b_('Do'), b_('sh')]:
continue
if operator == b_('re'):
continue
_operations.append((operands, operator))
content.operations = _operations
pageRef.__setitem__(NameObject('/Contents'), content)
def removeText(self, ignoreByteStringObject=False):
"""
Removes images from this output.
:param bool ignoreByteStringObject: optional parameter
to ignore ByteString Objects.
"""
pages = self.getObject(self._pages)['/Kids']
for j in range(len(pages)):
page = pages[j]
pageRef = self.getObject(page)
content = pageRef['/Contents'].getObject()
if not isinstance(content, ContentStream):
content = ContentStream(content, pageRef)
for operands,operator in content.operations:
if operator == b_('Tj'):
text = operands[0]
if not ignoreByteStringObject:
if isinstance(text, TextStringObject):
operands[0] = TextStringObject()
else:
if isinstance(text, TextStringObject) or \
isinstance(text, ByteStringObject):
operands[0] = TextStringObject()
elif operator == b_("'"):
text = operands[0]
if not ignoreByteStringObject:
if isinstance(text, TextStringObject):
operands[0] = TextStringObject()
else:
if isinstance(text, TextStringObject) or \
isinstance(text, ByteStringObject):
operands[0] = TextStringObject()
elif operator == b_('"'):
text = operands[2]
if not ignoreByteStringObject:
if isinstance(text, TextStringObject):
operands[2] = TextStringObject()
else:
if isinstance(text, TextStringObject) or \
isinstance(text, ByteStringObject):
operands[2] = TextStringObject()
elif operator == b_("TJ"):
for i in range(len(operands[0])):
if not ignoreByteStringObject:
if isinstance(operands[0][i], TextStringObject):
operands[0][i] = TextStringObject()
else:
if isinstance(operands[0][i], TextStringObject) or \
isinstance(operands[0][i], ByteStringObject):
operands[0][i] = TextStringObject()
pageRef.__setitem__(NameObject('/Contents'), content)
def addLink(self, pagenum, pagedest, rect, border=None, fit='/Fit', *args):
"""
Add an internal link from a rectangular area to the specified page.
:param int pagenum: index of the page on which to place the link.
:param int pagedest: index of the page to which the link should go.
:param rect: :class:`RectangleObject<PyPDF2.generic.RectangleObject>` or array of four
integers specifying the clickable rectangular area
``[xLL, yLL, xUR, yUR]``, or string in the form ``"[ xLL yLL xUR yUR ]"``.
:param border: if provided, an array describing border-drawing
properties. See the PDF spec for details. No border will be
drawn if this argument is omitted.
:param str fit: Page fit or 'zoom' option (see below). Additional arguments may need
to be supplied. Passing ``None`` will be read as a null value for that coordinate.
Valid zoom arguments (see Table 8.2 of the PDF 1.7 reference for details):
/Fit No additional arguments
/XYZ [left] [top] [zoomFactor]
/FitH [top]
/FitV [left]
/FitR [left] [bottom] [right] [top]
/FitB No additional arguments
/FitBH [top]
/FitBV [left]
"""
pageLink = self.getObject(self._pages)['/Kids'][pagenum]
pageDest = self.getObject(self._pages)['/Kids'][pagedest] #TODO: switch for external link
pageRef = self.getObject(pageLink)
if border is not None:
borderArr = [NameObject(n) for n in border[:3]]
if len(border) == 4:
dashPattern = ArrayObject([NameObject(n) for n in border[3]])
borderArr.append(dashPattern)
else:
borderArr = [NumberObject(0)] * 3
if isString(rect):
rect = NameObject(rect)
elif isinstance(rect, RectangleObject):
pass
else:
rect = RectangleObject(rect)
zoomArgs = []
for a in args:
if a is not None:
zoomArgs.append(NumberObject(a))
else:
zoomArgs.append(NullObject())
dest = Destination(NameObject("/LinkName"), pageDest, NameObject(fit), *zoomArgs) #TODO: create a better name for the link
destArray = dest.getDestArray()
lnk = DictionaryObject()
lnk.update({
NameObject('/Type'): NameObject('/Annot'),
NameObject('/Subtype'): NameObject('/Link'),
NameObject('/P'): pageLink,
NameObject('/Rect'): rect,
NameObject('/Border'): ArrayObject(borderArr),
NameObject('/Dest'): destArray
})
lnkRef = self._addObject(lnk)
if "/Annots" in pageRef:
pageRef['/Annots'].append(lnkRef)
else:
pageRef[NameObject('/Annots')] = ArrayObject([lnkRef])
_valid_layouts = ['/NoLayout', '/SinglePage', '/OneColumn', '/TwoColumnLeft', '/TwoColumnRight', '/TwoPageLeft', '/TwoPageRight']
def getPageLayout(self):
"""
Get the page layout.
See :meth:`setPageLayout()<PdfFileWriter.setPageLayout>` for a description of valid layouts.
:return: Page layout currently being used.
:rtype: str, None if not specified
"""
try:
return self._root_object['/PageLayout']
except KeyError:
return None
def setPageLayout(self, layout):
"""
Set the page layout
:param str layout: The page layout to be used
Valid layouts are:
/NoLayout Layout explicitly not specified
/SinglePage Show one page at a time
/OneColumn Show one column at a time
/TwoColumnLeft Show pages in two columns, odd-numbered pages on the left
/TwoColumnRight Show pages in two columns, odd-numbered pages on the right
/TwoPageLeft Show two pages at a time, odd-numbered pages on the left
/TwoPageRight Show two pages at a time, odd-numbered pages on the right
"""
if not isinstance(layout, NameObject):
if layout not in self._valid_layouts:
warnings.warn("Layout should be one of: {}".format(', '.join(self._valid_layouts)))
layout = NameObject(layout)
self._root_object.update({NameObject('/PageLayout'): layout})
pageLayout = property(getPageLayout, setPageLayout)
"""Read and write property accessing the :meth:`getPageLayout()<PdfFileWriter.getPageLayout>`
and :meth:`setPageLayout()<PdfFileWriter.setPageLayout>` methods."""
_valid_modes = ['/UseNone', '/UseOutlines', '/UseThumbs', '/FullScreen', '/UseOC', '/UseAttachments']
def getPageMode(self):
"""
Get the page mode.
See :meth:`setPageMode()<PdfFileWriter.setPageMode>` for a description
of valid modes.
:return: Page mode currently being used.
:rtype: str, None if not specified
"""
try:
return self._root_object['/PageMode']
except KeyError:
return None
def setPageMode(self, mode):
"""
Set the page mode.
:param str mode: The page mode to use.
Valid modes are:
/UseNone Do not show outlines or thumbnails panels
/UseOutlines Show outlines (aka bookmarks) panel
/UseThumbs Show page thumbnails panel
/FullScreen Fullscreen view
/UseOC Show Optional Content Group (OCG) panel
/UseAttachments Show attachments panel
"""
if not isinstance(mode, NameObject):
if mode not in self._valid_modes:
warnings.warn("Mode should be one of: {}".format(', '.join(self._valid_modes)))
mode = NameObject(mode)
self._root_object.update({NameObject('/PageMode'): mode})
pageMode = property(getPageMode, setPageMode)
"""Read and write property accessing the :meth:`getPageMode()<PdfFileWriter.getPageMode>`
and :meth:`setPageMode()<PdfFileWriter.setPageMode>` methods."""
class PdfFileReader(object):
"""
Initializes a PdfFileReader object. This operation can take some time, as
the PDF stream's cross-reference tables are read into memory.
:param stream: A File object or an object that supports the standard read
and seek methods similar to a File object. Could also be a
string representing a path to a PDF file.
:param bool strict: Determines whether user should be warned of all
problems and also causes some correctable problems to be fatal.
Defaults to ``True``.
:param warndest: Destination for logging warnings (defaults to
``sys.stderr``).
:param bool overwriteWarnings: Determines whether to override Python's
``warnings.py`` module with a custom implementation (defaults to
``True``).
"""
def __init__(self, stream, strict=True, warndest = None, overwriteWarnings = True):
if overwriteWarnings:
# have to dynamically override the default showwarning since there are no
# public methods that specify the 'file' parameter
def _showwarning(message, category, filename, lineno, file=warndest, line=None):
if file is None:
file = sys.stderr
try:
file.write(formatWarning(message, category, filename, lineno, line))
except IOError:
pass
warnings.showwarning = _showwarning
self.strict = strict
self.flattenedPages = None
self.resolvedObjects = {}
self.xrefIndex = 0
self._pageId2Num = None # map page IndirectRef number to Page Number
if hasattr(stream, 'mode') and 'b' not in stream.mode:
warnings.warn("PdfFileReader stream/file object is not in binary mode. It may not be read correctly.", utils.PdfReadWarning)
if isString(stream):
fileobj = open(stream, 'rb')
stream = BytesIO(b_(fileobj.read()))
fileobj.close()
self.read(stream)
self.stream = stream
self._override_encryption = False
def getDocumentInfo(self):
"""
Retrieves the PDF file's document information dictionary, if it exists.
Note that some PDF files use metadata streams instead of docinfo
dictionaries, and these metadata streams will not be accessed by this
function.
:return: the document information of this PDF file
:rtype: :class:`DocumentInformation<pdf.DocumentInformation>` or ``None`` if none exists.
"""
if "/Info" not in self.trailer:
return None
obj = self.trailer['/Info']
retval = DocumentInformation()
retval.update(obj)
return retval
documentInfo = property(lambda self: self.getDocumentInfo(), None, None)
"""Read-only property that accesses the :meth:`getDocumentInfo()<PdfFileReader.getDocumentInfo>` function."""
def getXmpMetadata(self):
"""
Retrieves XMP (Extensible Metadata Platform) data from the PDF document
root.
:return: a :class:`XmpInformation<xmp.XmpInformation>`
instance that can be used to access XMP metadata from the document.
:rtype: :class:`XmpInformation<xmp.XmpInformation>` or
``None`` if no metadata was found on the document root.
"""
try:
self._override_encryption = True
return self.trailer["/Root"].getXmpMetadata()
finally:
self._override_encryption = False
xmpMetadata = property(lambda self: self.getXmpMetadata(), None, None)
"""
Read-only property that accesses the
:meth:`getXmpMetadata()<PdfFileReader.getXmpMetadata>` function.
"""
def getNumPages(self):
"""
Calculates the number of pages in this PDF file.
:return: number of pages
:rtype: int
:raises PdfReadError: if file is encrypted and restrictions prevent
this action.
"""
# Flattened pages will not work on an Encrypted PDF;
# the PDF file's page count is used in this case. Otherwise,
# the original method (flattened page count) is used.
if self.isEncrypted:
try:
self._override_encryption = True
self.decrypt('')
return self.trailer["/Root"]["/Pages"]["/Count"]
except:
raise utils.PdfReadError("File has not been decrypted")
finally:
self._override_encryption = False
else:
if self.flattenedPages == None:
self._flatten()
return len(self.flattenedPages)
numPages = property(lambda self: self.getNumPages(), None, None)
"""
Read-only property that accesses the
:meth:`getNumPages()<PdfFileReader.getNumPages>` function.
"""
def getPage(self, pageNumber):
"""
Retrieves a page by number from this PDF file.
:param int pageNumber: The page number to retrieve
(pages begin at zero)
:return: a :class:`PageObject<pdf.PageObject>` instance.
:rtype: :class:`PageObject<pdf.PageObject>`
"""
## ensure that we're not trying to access an encrypted PDF
#assert not self.trailer.has_key("/Encrypt")
if self.flattenedPages == None:
self._flatten()
return self.flattenedPages[pageNumber]
namedDestinations = property(lambda self:
self.getNamedDestinations(), None, None)
"""
Read-only property that accesses the
:meth:`getNamedDestinations()<PdfFileReader.getNamedDestinations>` function.
"""
# A select group of relevant field attributes. For the complete list,
# see section 8.6.2 of the PDF 1.7 reference.
def getFields(self, tree = None, retval = None, fileobj = None):
"""
Extracts field data if this PDF contains interactive form fields.
The *tree* and *retval* parameters are for recursive use.
:param fileobj: A file object (usually a text file) to write
a report to on all interactive form fields found.
:return: A dictionary where each key is a field name, and each
value is a :class:`Field<PyPDF2.generic.Field>` object. By
default, the mapping name is used for keys.
:rtype: dict, or ``None`` if form data could not be located.
"""
fieldAttributes = {"/FT" : "Field Type", "/Parent" : "Parent",
"/T" : "Field Name", "/TU" : "Alternate Field Name",
"/TM" : "Mapping Name", "/Ff" : "Field Flags",
"/V" : "Value", "/DV" : "Default Value"}
if retval == None:
retval = {}
catalog = self.trailer["/Root"]
# get the AcroForm tree
if "/AcroForm" in catalog:
tree = catalog["/AcroForm"]
else:
return None
if tree == None:
return retval
self._checkKids(tree, retval, fileobj)
for attr in fieldAttributes:
if attr in tree:
# Tree is a field
self._buildField(tree, retval, fileobj, fieldAttributes)
break
if "/Fields" in tree:
fields = tree["/Fields"]
for f in fields:
field = f.getObject()
self._buildField(field, retval, fileobj, fieldAttributes)
return retval
def _buildField(self, field, retval, fileobj, fieldAttributes):
self._checkKids(field, retval, fileobj)
try:
key = field["/TM"]
except KeyError:
try:
key = field["/T"]
except KeyError:
# Ignore no-name field for now
return
if fileobj:
self._writeField(fileobj, field, fieldAttributes)
fileobj.write("\n")
retval[key] = Field(field)
def _checkKids(self, tree, retval, fileobj):
if "/Kids" in tree:
# recurse down the tree
for kid in tree["/Kids"]:
self.getFields(kid.getObject(), retval, fileobj)
def _writeField(self, fileobj, field, fieldAttributes):
order = ["/TM", "/T", "/FT", "/Parent", "/TU", "/Ff", "/V", "/DV"]
for attr in order:
attrName = fieldAttributes[attr]
try:
if attr == "/FT":
# Make the field type value more clear
types = {"/Btn":"Button", "/Tx":"Text", "/Ch": "Choice",
"/Sig":"Signature"}
if field[attr] in types:
fileobj.write(attrName + ": " + types[field[attr]] + "\n")
elif attr == "/Parent":
# Let's just write the name of the parent
try:
name = field["/Parent"]["/TM"]
except KeyError:
name = field["/Parent"]["/T"]
fileobj.write(attrName + ": " + name + "\n")
else:
fileobj.write(attrName + ": " + str(field[attr]) + "\n")
except KeyError:
# Field attribute is N/A or unknown, so don't write anything
pass
def getNamedDestinations(self, tree=None, retval=None):
"""
Retrieves the named destinations present in the document.
:return: a dictionary which maps names to
:class:`Destinations<PyPDF2.generic.Destination>`.
:rtype: dict
"""
if retval == None:
retval = {}
catalog = self.trailer["/Root"]
# get the name tree
if "/Dests" in catalog:
tree = catalog["/Dests"]
elif "/Names" in catalog:
names = catalog['/Names']
if "/Dests" in names:
tree = names['/Dests']
if tree == None:
return retval
if "/Kids" in tree:
# recurse down the tree
for kid in tree["/Kids"]:
self.getNamedDestinations(kid.getObject(), retval)
if "/Names" in tree:
names = tree["/Names"]
for i in range(0, len(names), 2):
key = names[i].getObject()
val = names[i+1].getObject()
if isinstance(val, DictionaryObject) and '/D' in val:
val = val['/D']
dest = self._buildDestination(key, val)
if dest != None:
retval[key] = dest
return retval
outlines = property(lambda self: self.getOutlines(), None, None)
"""
Read-only property that accesses the
:meth:`getOutlines()<PdfFileReader.getOutlines>` function.
"""
def getOutlines(self, node=None, outlines=None):
"""
Retrieves the document outline present in the document.
:return: a nested list of :class:`Destinations<PyPDF2.generic.Destination>`.
"""
if outlines == None:
outlines = []
catalog = self.trailer["/Root"]
# get the outline dictionary and named destinations
if "/Outlines" in catalog:
try:
lines = catalog["/Outlines"]
except utils.PdfReadError:
# this occurs if the /Outlines object reference is incorrect
# for an example of such a file, see https://unglueit-files.s3.amazonaws.com/ebf/7552c42e9280b4476e59e77acc0bc812.pdf
# so continue to load the file without the Bookmarks
return outlines
if "/First" in lines:
node = lines["/First"]
self._namedDests = self.getNamedDestinations()
if node == None:
return outlines
# see if there are any more outlines
while True:
outline = self._buildOutline(node)
if outline:
outlines.append(outline)
# check for sub-outlines
if "/First" in node:
subOutlines = []
self.getOutlines(node["/First"], subOutlines)
if subOutlines:
outlines.append(subOutlines)
if "/Next" not in node:
break
node = node["/Next"]
return outlines
def _getPageNumberByIndirect(self, indirectRef):
"""Generate _pageId2Num"""
if self._pageId2Num is None:
id2num = {}
for i, x in enumerate(self.pages):
id2num[x.indirectRef.idnum] = i
self._pageId2Num = id2num
if isinstance(indirectRef, int):
idnum = indirectRef
else:
idnum = indirectRef.idnum
ret = self._pageId2Num.get(idnum, -1)
return ret
def getPageNumber(self, page):
"""
Retrieve page number of a given PageObject
:param PageObject page: The page to get page number. Should be
an instance of :class:`PageObject<PyPDF2.pdf.PageObject>`
:return: the page number or -1 if page not found
:rtype: int
"""
indirectRef = page.indirectRef
ret = self._getPageNumberByIndirect(indirectRef)
return ret
def getDestinationPageNumber(self, destination):
"""
Retrieve page number of a given Destination object
:param Destination destination: The destination to get page number.
Should be an instance of
:class:`Destination<PyPDF2.pdf.Destination>`
:return: the page number or -1 if page not found
:rtype: int
"""
indirectRef = destination.page
ret = self._getPageNumberByIndirect(indirectRef)
return ret
def _buildDestination(self, title, array):
page, typ = array[0:2]
array = array[2:]
return Destination(title, page, typ, *array)
def _buildOutline(self, node):
dest, title, outline = None, None, None
if "/A" in node and "/Title" in node:
# Action, section 8.5 (only type GoTo supported)
title = node["/Title"]
action = node["/A"]
if action["/S"] == "/GoTo":
dest = action["/D"]
elif "/Dest" in node and "/Title" in node:
# Destination, section 8.2.1
title = node["/Title"]
dest = node["/Dest"]
# if destination found, then create outline
if dest:
if isinstance(dest, ArrayObject):
outline = self._buildDestination(title, dest)
elif isString(dest) and dest in self._namedDests:
outline = self._namedDests[dest]
outline[NameObject("/Title")] = title
else:
raise utils.PdfReadError("Unexpected destination %r" % dest)
return outline
pages = property(lambda self: ConvertFunctionsToVirtualList(self.getNumPages, self.getPage),
None, None)
"""
Read-only property that emulates a list based upon the
:meth:`getNumPages()<PdfFileReader.getNumPages>` and
:meth:`getPage()<PdfFileReader.getPage>` methods.
"""
def getPageLayout(self):
"""
Get the page layout.
See :meth:`setPageLayout()<PdfFileWriter.setPageLayout>`
for a description of valid layouts.
:return: Page layout currently being used.
:rtype: ``str``, ``None`` if not specified
"""
try:
return self.trailer['/Root']['/PageLayout']
except KeyError:
return None
pageLayout = property(getPageLayout)
"""Read-only property accessing the
:meth:`getPageLayout()<PdfFileReader.getPageLayout>` method."""
def getPageMode(self):
"""
Get the page mode.
See :meth:`setPageMode()<PdfFileWriter.setPageMode>`
for a description of valid modes.
:return: Page mode currently being used.
:rtype: ``str``, ``None`` if not specified
"""
try:
return self.trailer['/Root']['/PageMode']
except KeyError:
return None
pageMode = property(getPageMode)
"""Read-only property accessing the
:meth:`getPageMode()<PdfFileReader.getPageMode>` method."""
def _flatten(self, pages=None, inherit=None, indirectRef=None):
inheritablePageAttributes = (
NameObject("/Resources"), NameObject("/MediaBox"),
NameObject("/CropBox"), NameObject("/Rotate")
)
if inherit == None:
inherit = dict()
if pages == None:
self.flattenedPages = []
catalog = self.trailer["/Root"].getObject()
pages = catalog["/Pages"].getObject()
t = "/Pages"
if "/Type" in pages:
t = pages["/Type"]
if t == "/Pages":
for attr in inheritablePageAttributes:
if attr in pages:
inherit[attr] = pages[attr]
for page in pages["/Kids"]:
addt = {}
if isinstance(page, IndirectObject):
addt["indirectRef"] = page
self._flatten(page.getObject(), inherit, **addt)
elif t == "/Page":
for attr, value in list(inherit.items()):
# if the page has it's own value, it does not inherit the
# parent's value:
if attr not in pages:
pages[attr] = value
pageObj = PageObject(self, indirectRef)
pageObj.update(pages)
self.flattenedPages.append(pageObj)
def _getObjectFromStream(self, indirectReference):
# indirect reference to object in object stream
# read the entire object stream into memory
debug = False
stmnum, idx = self.xref_objStm[indirectReference.idnum]
if debug: print(("Here1: %s %s"%(stmnum, idx)))
objStm = IndirectObject(stmnum, 0, self).getObject()
if debug: print(("Here2: objStm=%s.. stmnum=%s data=%s"%(objStm, stmnum, objStm.getData())))
# This is an xref to a stream, so its type better be a stream
assert objStm['/Type'] == '/ObjStm'
# /N is the number of indirect objects in the stream
assert idx < objStm['/N']
streamData = BytesIO(b_(objStm.getData()))
for i in range(objStm['/N']):
readNonWhitespace(streamData)
streamData.seek(-1, 1)
objnum = NumberObject.readFromStream(streamData)
readNonWhitespace(streamData)
streamData.seek(-1, 1)
offset = NumberObject.readFromStream(streamData)
readNonWhitespace(streamData)
streamData.seek(-1, 1)
if objnum != indirectReference.idnum:
# We're only interested in one object
continue
if self.strict and idx != i:
raise utils.PdfReadError("Object is in wrong index.")
streamData.seek(objStm['/First']+offset, 0)
if debug:
pos = streamData.tell()
streamData.seek(0, 0)
lines = streamData.readlines()
for i in range(0, len(lines)):
print((lines[i]))
streamData.seek(pos, 0)
try:
obj = readObject(streamData, self)
except utils.PdfStreamError as e:
# Stream object cannot be read. Normally, a critical error, but
# Adobe Reader doesn't complain, so continue (in strict mode?)
e = sys.exc_info()[1]
warnings.warn("Invalid stream (index %d) within object %d %d: %s" % \
(i, indirectReference.idnum, indirectReference.generation, e), utils.PdfReadWarning)
if self.strict:
raise utils.PdfReadError("Can't read object stream: %s"%e)
# Replace with null. Hopefully it's nothing important.
obj = NullObject()
return obj
if self.strict: raise utils.PdfReadError("This is a fatal error in strict mode.")
return NullObject()
def getObject(self, indirectReference):
debug = False
if debug: print(("looking at:", indirectReference.idnum, indirectReference.generation))
retval = self.cacheGetIndirectObject(indirectReference.generation,
indirectReference.idnum)
if retval != None:
return retval
if indirectReference.generation == 0 and \
indirectReference.idnum in self.xref_objStm:
retval = self._getObjectFromStream(indirectReference)
elif indirectReference.generation in self.xref and \
indirectReference.idnum in self.xref[indirectReference.generation]:
start = self.xref[indirectReference.generation][indirectReference.idnum]
if debug: print((" Uncompressed Object", indirectReference.idnum, indirectReference.generation, ":", start))
self.stream.seek(start, 0)
idnum, generation = self.readObjectHeader(self.stream)
if idnum != indirectReference.idnum and self.xrefIndex:
# Xref table probably had bad indexes due to not being zero-indexed
if self.strict:
raise utils.PdfReadError("Expected object ID (%d %d) does not match actual (%d %d); xref table not zero-indexed." \
% (indirectReference.idnum, indirectReference.generation, idnum, generation))
else: pass # xref table is corrected in non-strict mode
elif idnum != indirectReference.idnum:
# some other problem
raise utils.PdfReadError("Expected object ID (%d %d) does not match actual (%d %d)." \
% (indirectReference.idnum, indirectReference.generation, idnum, generation))
assert generation == indirectReference.generation
retval = readObject(self.stream, self)
# override encryption is used for the /Encrypt dictionary
if not self._override_encryption and self.isEncrypted:
# if we don't have the encryption key:
if not hasattr(self, '_decryption_key'):
raise utils.PdfReadError("file has not been decrypted")
# otherwise, decrypt here...
import struct
pack1 = struct.pack("<i", indirectReference.idnum)[:3]
pack2 = struct.pack("<i", indirectReference.generation)[:2]
key = self._decryption_key + pack1 + pack2
assert len(key) == (len(self._decryption_key) + 5)
md5_hash = md5(key).digest()
key = md5_hash[:min(16, len(self._decryption_key) + 5)]
retval = self._decryptObject(retval, key)
else:
warnings.warn("Object %d %d not defined."%(indirectReference.idnum,
indirectReference.generation), utils.PdfReadWarning)
#if self.strict:
raise utils.PdfReadError("Could not find object.")
self.cacheIndirectObject(indirectReference.generation,
indirectReference.idnum, retval)
return retval
def _decryptObject(self, obj, key):
if isinstance(obj, ByteStringObject) or isinstance(obj, TextStringObject):
obj = createStringObject(utils.RC4_encrypt(key, obj.original_bytes))
elif isinstance(obj, StreamObject):
obj._data = utils.RC4_encrypt(key, obj._data)
elif isinstance(obj, DictionaryObject):
for dictkey, value in list(obj.items()):
obj[dictkey] = self._decryptObject(value, key)
elif isinstance(obj, ArrayObject):
for i in range(len(obj)):
obj[i] = self._decryptObject(obj[i], key)
return obj
def readObjectHeader(self, stream):
# Should never be necessary to read out whitespace, since the
# cross-reference table should put us in the right spot to read the
# object header. In reality... some files have stupid cross reference
# tables that are off by whitespace bytes.
extra = False
utils.skipOverComment(stream)
extra |= utils.skipOverWhitespace(stream); stream.seek(-1, 1)
idnum = readUntilWhitespace(stream)
extra |= utils.skipOverWhitespace(stream); stream.seek(-1, 1)
generation = readUntilWhitespace(stream)
obj = stream.read(3)
readNonWhitespace(stream)
stream.seek(-1, 1)
if (extra and self.strict):
#not a fatal error
warnings.warn("Superfluous whitespace found in object header %s %s" % \
(idnum, generation), utils.PdfReadWarning)
return int(idnum), int(generation)
def cacheGetIndirectObject(self, generation, idnum):
debug = False
out = self.resolvedObjects.get((generation, idnum))
if debug and out: print(("cache hit: %d %d"%(idnum, generation)))
elif debug: print(("cache miss: %d %d"%(idnum, generation)))
return out
def cacheIndirectObject(self, generation, idnum, obj):
# return None # Sometimes we want to turn off cache for debugging.
if (generation, idnum) in self.resolvedObjects:
msg = "Overwriting cache for %s %s"%(generation, idnum)
if self.strict: raise utils.PdfReadError(msg)
else: warnings.warn(msg)
self.resolvedObjects[(generation, idnum)] = obj
return obj
def read(self, stream):
debug = False
if debug: print(">>read", stream)
# start at the end:
stream.seek(-1, 2)
if not stream.tell():
raise utils.PdfReadError('Cannot read an empty file')
last1K = stream.tell() - 1024 + 1 # offset of last 1024 bytes of stream
line = b_('')
while line[:5] != b_("%%EOF"):
if stream.tell() < last1K:
raise utils.PdfReadError("EOF marker not found")
line = self.readNextEndLine(stream)
if debug: print(" line:",line)
# find startxref entry - the location of the xref table
line = self.readNextEndLine(stream)
try:
startxref = int(line)
except ValueError:
# 'startxref' may be on the same line as the location
if not line.startswith(b_("startxref")):
raise utils.PdfReadError("startxref not found")
startxref = int(line[9:].strip())
warnings.warn("startxref on same line as offset")
else:
line = self.readNextEndLine(stream)
if line[:9] != b_("startxref"):
raise utils.PdfReadError("startxref not found")
# read all cross reference tables and their trailers
self.xref = {}
self.xref_objStm = {}
self.trailer = DictionaryObject()
while True:
# load the xref table
stream.seek(startxref, 0)
x = stream.read(1)
if x == b_("x"):
# standard cross-reference table
ref = stream.read(4)
if ref[:3] != b_("ref"):
raise utils.PdfReadError("xref table read error")
readNonWhitespace(stream)
stream.seek(-1, 1)
firsttime = True; # check if the first time looking at the xref table
while True:
num = readObject(stream, self)
if firsttime and num != 0:
self.xrefIndex = num
warnings.warn("Xref table not zero-indexed. ID numbers for objects will %sbe corrected." % \
("" if not self.strict else "not "), utils.PdfReadWarning)
#if table not zero indexed, could be due to error from when PDF was created
#which will lead to mismatched indices later on
firsttime = False
readNonWhitespace(stream)
stream.seek(-1, 1)
size = readObject(stream, self)
readNonWhitespace(stream)
stream.seek(-1, 1)
cnt = 0
while cnt < size:
line = stream.read(20)
# It's very clear in section 3.4.3 of the PDF spec
# that all cross-reference table lines are a fixed
# 20 bytes (as of PDF 1.7). However, some files have
# 21-byte entries (or more) due to the use of \r\n
# (CRLF) EOL's. Detect that case, and adjust the line
# until it does not begin with a \r (CR) or \n (LF).
while line[0] in b_("\x0D\x0A"):
stream.seek(-20 + 1, 1)
line = stream.read(20)
# On the other hand, some malformed PDF files
# use a single character EOL without a preceeding
# space. Detect that case, and seek the stream
# back one character. (0-9 means we've bled into
# the next xref entry, t means we've bled into the
# text "trailer"):
if line[-1] in b_("0123456789t"):
stream.seek(-1, 1)
offset, generation = line[:16].split(b_(" "))
offset, generation = int(offset), int(generation)
if generation not in self.xref:
self.xref[generation] = {}
if num in self.xref[generation]:
# It really seems like we should allow the last
# xref table in the file to override previous
# ones. Since we read the file backwards, assume
# any existing key is already set correctly.
pass
else:
self.xref[generation][num] = offset
cnt += 1
num += 1
readNonWhitespace(stream)
stream.seek(-1, 1)
trailertag = stream.read(7)
if trailertag != b_("trailer"):
# more xrefs!
stream.seek(-7, 1)
else:
break
readNonWhitespace(stream)
stream.seek(-1, 1)
newTrailer = readObject(stream, self)
for key, value in list(newTrailer.items()):
if key not in self.trailer:
self.trailer[key] = value
if "/Prev" in newTrailer:
startxref = newTrailer["/Prev"]
else:
break
elif x.isdigit():
# PDF 1.5+ Cross-Reference Stream
stream.seek(-1, 1)
idnum, generation = self.readObjectHeader(stream)
xrefstream = readObject(stream, self)
assert xrefstream["/Type"] == "/XRef"
self.cacheIndirectObject(generation, idnum, xrefstream)
streamData = BytesIO(b_(xrefstream.getData()))
# Index pairs specify the subsections in the dictionary. If
# none create one subsection that spans everything.
idx_pairs = xrefstream.get("/Index", [0, xrefstream.get("/Size")])
if debug: print(("read idx_pairs=%s"%list(self._pairs(idx_pairs))))
entrySizes = xrefstream.get("/W")
assert len(entrySizes) >= 3
if self.strict and len(entrySizes) > 3:
raise utils.PdfReadError("Too many entry sizes: %s" %entrySizes)
def getEntry(i):
# Reads the correct number of bytes for each entry. See the
# discussion of the W parameter in PDF spec table 17.
if entrySizes[i] > 0:
d = streamData.read(entrySizes[i])
return convertToInt(d, entrySizes[i])
# PDF Spec Table 17: A value of zero for an element in the
# W array indicates...the default value shall be used
if i == 0: return 1 # First value defaults to 1
else: return 0
def used_before(num, generation):
# We move backwards through the xrefs, don't replace any.
return num in self.xref.get(generation, []) or \
num in self.xref_objStm
# Iterate through each subsection
last_end = 0
for start, size in self._pairs(idx_pairs):
# The subsections must increase
assert start >= last_end
last_end = start + size
for num in range(start, start+size):
# The first entry is the type
xref_type = getEntry(0)
# The rest of the elements depend on the xref_type
if xref_type == 0:
# linked list of free objects
next_free_object = getEntry(1)
next_generation = getEntry(2)
elif xref_type == 1:
# objects that are in use but are not compressed
byte_offset = getEntry(1)
generation = getEntry(2)
if generation not in self.xref:
self.xref[generation] = {}
if not used_before(num, generation):
self.xref[generation][num] = byte_offset
if debug: print(("XREF Uncompressed: %s %s"%(
num, generation)))
elif xref_type == 2:
# compressed objects
objstr_num = getEntry(1)
obstr_idx = getEntry(2)
generation = 0 # PDF spec table 18, generation is 0
if not used_before(num, generation):
if debug: print(("XREF Compressed: %s %s %s"%(
num, objstr_num, obstr_idx)))
self.xref_objStm[num] = (objstr_num, obstr_idx)
elif self.strict:
raise utils.PdfReadError("Unknown xref type: %s"%
xref_type)
trailerKeys = "/Root", "/Encrypt", "/Info", "/ID"
for key in trailerKeys:
if key in xrefstream and key not in self.trailer:
self.trailer[NameObject(key)] = xrefstream.raw_get(key)
if "/Prev" in xrefstream:
startxref = xrefstream["/Prev"]
else:
break
else:
# bad xref character at startxref. Let's see if we can find
# the xref table nearby, as we've observed this error with an
# off-by-one before.
stream.seek(-11, 1)
tmp = stream.read(20)
xref_loc = tmp.find(b_("xref"))
if xref_loc != -1:
startxref -= (10 - xref_loc)
continue
# No explicit xref table, try finding a cross-reference stream.
stream.seek(startxref, 0)
found = False
for look in range(5):
if stream.read(1).isdigit():
# This is not a standard PDF, consider adding a warning
startxref += look
found = True
break
if found:
continue
# no xref table found at specified location
raise utils.PdfReadError("Could not find xref table at specified location")
#if not zero-indexed, verify that the table is correct; change it if necessary
if self.xrefIndex and not self.strict:
loc = stream.tell()
for gen in self.xref:
if gen == 65535: continue
for id in self.xref[gen]:
stream.seek(self.xref[gen][id], 0)
try:
pid, pgen = self.readObjectHeader(stream)
except ValueError:
break
if pid == id - self.xrefIndex:
self._zeroXref(gen)
break
#if not, then either it's just plain wrong, or the non-zero-index is actually correct
stream.seek(loc, 0) #return to where it was
def _zeroXref(self, generation):
self.xref[generation] = dict( (k-self.xrefIndex, v) for (k, v) in list(self.xref[generation].items()) )
def _pairs(self, array):
i = 0
while True:
yield array[i], array[i+1]
i += 2
if (i+1) >= len(array):
break
def readNextEndLine(self, stream):
debug = False
if debug: print(">>readNextEndLine")
line = b_("")
while True:
# Prevent infinite loops in malformed PDFs
if stream.tell() == 0:
raise utils.PdfReadError("Could not read malformed PDF file")
x = stream.read(1)
if debug: print((" x:", x, "%x"%ord(x)))
if stream.tell() < 2:
raise utils.PdfReadError("EOL marker not found")
stream.seek(-2, 1)
if x == b_('\n') or x == b_('\r'): ## \n = LF; \r = CR
crlf = False
while x == b_('\n') or x == b_('\r'):
if debug:
if ord(x) == 0x0D: print(" x is CR 0D")
elif ord(x) == 0x0A: print(" x is LF 0A")
x = stream.read(1)
if x == b_('\n') or x == b_('\r'): # account for CR+LF
stream.seek(-1, 1)
crlf = True
if stream.tell() < 2:
raise utils.PdfReadError("EOL marker not found")
stream.seek(-2, 1)
stream.seek(2 if crlf else 1, 1) #if using CR+LF, go back 2 bytes, else 1
break
else:
if debug: print(" x is neither")
line = x + line
if debug: print((" RNEL line:", line))
if debug: print("leaving RNEL")
return line
def decrypt(self, password):
"""
When using an encrypted / secured PDF file with the PDF Standard
encryption handler, this function will allow the file to be decrypted.
It checks the given password against the document's user password and
owner password, and then stores the resulting decryption key if either
password is correct.
It does not matter which password was matched. Both passwords provide
the correct decryption key that will allow the document to be used with
this library.
:param str password: The password to match.
:return: ``0`` if the password failed, ``1`` if the password matched the user
password, and ``2`` if the password matched the owner password.
:rtype: int
:raises NotImplementedError: if document uses an unsupported encryption
method.
"""
self._override_encryption = True
try:
return self._decrypt(password)
finally:
self._override_encryption = False
def _decrypt(self, password):
encrypt = self.trailer['/Encrypt'].getObject()
if encrypt['/Filter'] != '/Standard':
raise NotImplementedError("only Standard PDF encryption handler is available")
if not (encrypt['/V'] in (1, 2)):
raise NotImplementedError("only algorithm code 1 and 2 are supported")
user_password, key = self._authenticateUserPassword(password)
if user_password:
self._decryption_key = key
return 1
else:
rev = encrypt['/R'].getObject()
if rev == 2:
keylen = 5
else:
keylen = encrypt['/Length'].getObject() // 8
key = _alg33_1(password, rev, keylen)
real_O = encrypt["/O"].getObject()
if rev == 2:
userpass = utils.RC4_encrypt(key, real_O)
else:
val = real_O
for i in range(19, -1, -1):
new_key = b_('')
for l in range(len(key)):
new_key += b_(chr(utils.ord_(key[l]) ^ i))
val = utils.RC4_encrypt(new_key, val)
userpass = val
owner_password, key = self._authenticateUserPassword(userpass)
if owner_password:
self._decryption_key = key
return 2
return 0
def _authenticateUserPassword(self, password):
encrypt = self.trailer['/Encrypt'].getObject()
rev = encrypt['/R'].getObject()
owner_entry = encrypt['/O'].getObject()
p_entry = encrypt['/P'].getObject()
id_entry = self.trailer['/ID'].getObject()
id1_entry = id_entry[0].getObject()
real_U = encrypt['/U'].getObject().original_bytes
if rev == 2:
U, key = _alg34(password, owner_entry, p_entry, id1_entry)
elif rev >= 3:
U, key = _alg35(password, rev,
encrypt["/Length"].getObject() // 8, owner_entry,
p_entry, id1_entry,
encrypt.get("/EncryptMetadata", BooleanObject(False)).getObject())
U, real_U = U[:16], real_U[:16]
return U == real_U, key
def getIsEncrypted(self):
return "/Encrypt" in self.trailer
isEncrypted = property(lambda self: self.getIsEncrypted(), None, None)
"""
Read-only boolean property showing whether this PDF file is encrypted.
Note that this property, if true, will remain true even after the
:meth:`decrypt()<PdfFileReader.decrypt>` method is called.
"""
def getRectangle(self, name, defaults):
retval = self.get(name)
if isinstance(retval, RectangleObject):
return retval
if retval == None:
for d in defaults:
retval = self.get(d)
if retval != None:
break
if isinstance(retval, IndirectObject):
retval = self.pdf.getObject(retval)
retval = RectangleObject(retval)
setRectangle(self, name, retval)
return retval
def setRectangle(self, name, value):
if not isinstance(name, NameObject):
name = NameObject(name)
self[name] = value
def deleteRectangle(self, name):
del self[name]
def createRectangleAccessor(name, fallback):
return \
property(
lambda self: getRectangle(self, name, fallback),
lambda self, value: setRectangle(self, name, value),
lambda self: deleteRectangle(self, name)
)
class PageObject(DictionaryObject):
"""
This class represents a single page within a PDF file. Typically this
object will be created by accessing the
:meth:`getPage()<PyPDF2.PdfFileReader.getPage>` method of the
:class:`PdfFileReader<PyPDF2.PdfFileReader>` class, but it is
also possible to create an empty page with the
:meth:`createBlankPage()<PageObject.createBlankPage>` static method.
:param pdf: PDF file the page belongs to.
:param indirectRef: Stores the original indirect reference to
this object in its source PDF
"""
def __init__(self, pdf=None, indirectRef=None):
DictionaryObject.__init__(self)
self.pdf = pdf
self.indirectRef = indirectRef
def createBlankPage(pdf=None, width=None, height=None):
"""
Returns a new blank page.
If ``width`` or ``height`` is ``None``, try to get the page size
from the last page of *pdf*.
:param pdf: PDF file the page belongs to
:param float width: The width of the new page expressed in default user
space units.
:param float height: The height of the new page expressed in default user
space units.
:return: the new blank page:
:rtype: :class:`PageObject<PageObject>`
:raises PageSizeNotDefinedError: if ``pdf`` is ``None`` or contains
no page
"""
page = PageObject(pdf)
# Creates a new page (cf PDF Reference 7.7.3.3)
page.__setitem__(NameObject('/Type'), NameObject('/Page'))
page.__setitem__(NameObject('/Parent'), NullObject())
page.__setitem__(NameObject('/Resources'), DictionaryObject())
if width is None or height is None:
if pdf is not None and pdf.getNumPages() > 0:
lastpage = pdf.getPage(pdf.getNumPages() - 1)
width = lastpage.mediaBox.getWidth()
height = lastpage.mediaBox.getHeight()
else:
raise utils.PageSizeNotDefinedError()
page.__setitem__(NameObject('/MediaBox'),
RectangleObject([0, 0, width, height]))
return page
createBlankPage = staticmethod(createBlankPage)
def rotateClockwise(self, angle):
"""
Rotates a page clockwise by increments of 90 degrees.
:param int angle: Angle to rotate the page. Must be an increment
of 90 deg.
"""
assert angle % 90 == 0
self._rotate(angle)
return self
def rotateCounterClockwise(self, angle):
"""
Rotates a page counter-clockwise by increments of 90 degrees.
:param int angle: Angle to rotate the page. Must be an increment
of 90 deg.
"""
assert angle % 90 == 0
self._rotate(-angle)
return self
def _rotate(self, angle):
currentAngle = self.get("/Rotate", 0)
self[NameObject("/Rotate")] = NumberObject(currentAngle + angle)
def _mergeResources(res1, res2, resource):
newRes = DictionaryObject()
newRes.update(res1.get(resource, DictionaryObject()).getObject())
page2Res = res2.get(resource, DictionaryObject()).getObject()
renameRes = {}
for key in list(page2Res.keys()):
if key in newRes and newRes[key] != page2Res[key]:
newname = NameObject(key + str(uuid.uuid4()))
renameRes[key] = newname
newRes[newname] = page2Res[key]
elif key not in newRes:
newRes[key] = page2Res.raw_get(key)
return newRes, renameRes
_mergeResources = staticmethod(_mergeResources)
def _contentStreamRename(stream, rename, pdf):
if not rename:
return stream
stream = ContentStream(stream, pdf)
for operands, operator in stream.operations:
for i in range(len(operands)):
op = operands[i]
if isinstance(op, NameObject):
operands[i] = rename.get(op,op)
return stream
_contentStreamRename = staticmethod(_contentStreamRename)
def _pushPopGS(contents, pdf):
# adds a graphics state "push" and "pop" to the beginning and end
# of a content stream. This isolates it from changes such as
# transformation matricies.
stream = ContentStream(contents, pdf)
stream.operations.insert(0, [[], "q"])
stream.operations.append([[], "Q"])
return stream
_pushPopGS = staticmethod(_pushPopGS)
def _addTransformationMatrix(contents, pdf, ctm):
# adds transformation matrix at the beginning of the given
# contents stream.
a, b, c, d, e, f = ctm
contents = ContentStream(contents, pdf)
contents.operations.insert(0, [[FloatObject(a), FloatObject(b),
FloatObject(c), FloatObject(d), FloatObject(e),
FloatObject(f)], " cm"])
return contents
_addTransformationMatrix = staticmethod(_addTransformationMatrix)
def getContents(self):
"""
Accesses the page contents.
:return: the ``/Contents`` object, or ``None`` if it doesn't exist.
``/Contents`` is optional, as described in PDF Reference 7.7.3.3
"""
if "/Contents" in self:
return self["/Contents"].getObject()
else:
return None
def mergePage(self, page2):
"""
Merges the content streams of two pages into one. Resource references
(i.e. fonts) are maintained from both pages. The mediabox/cropbox/etc
of this page are not altered. The parameter page's content stream will
be added to the end of this page's content stream, meaning that it will
be drawn after, or "on top" of this page.
:param PageObject page2: The page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
"""
self._mergePage(page2)
def _mergePage(self, page2, page2transformation=None, ctm=None, expand=False):
# First we work on merging the resource dictionaries. This allows us
# to find out what symbols in the content streams we might need to
# rename.
newResources = DictionaryObject()
rename = {}
originalResources = self["/Resources"].getObject()
page2Resources = page2["/Resources"].getObject()
newAnnots = ArrayObject()
for page in (self, page2):
if "/Annots" in page:
annots = page["/Annots"]
if isinstance(annots, ArrayObject):
for ref in annots:
newAnnots.append(ref)
for res in "/ExtGState", "/Font", "/XObject", "/ColorSpace", "/Pattern", "/Shading", "/Properties":
new, newrename = PageObject._mergeResources(originalResources, page2Resources, res)
if new:
newResources[NameObject(res)] = new
rename.update(newrename)
# Combine /ProcSet sets.
newResources[NameObject("/ProcSet")] = ArrayObject(
frozenset(originalResources.get("/ProcSet", ArrayObject()).getObject()).union(
frozenset(page2Resources.get("/ProcSet", ArrayObject()).getObject())
)
)
newContentArray = ArrayObject()
originalContent = self.getContents()
if originalContent is not None:
newContentArray.append(PageObject._pushPopGS(
originalContent, self.pdf))
page2Content = page2.getContents()
if page2Content is not None:
if page2transformation is not None:
page2Content = page2transformation(page2Content)
page2Content = PageObject._contentStreamRename(
page2Content, rename, self.pdf)
page2Content = PageObject._pushPopGS(page2Content, self.pdf)
newContentArray.append(page2Content)
# if expanding the page to fit a new page, calculate the new media box size
if expand:
corners1 = [self.mediaBox.getLowerLeft_x().as_numeric(), self.mediaBox.getLowerLeft_y().as_numeric(),
self.mediaBox.getUpperRight_x().as_numeric(), self.mediaBox.getUpperRight_y().as_numeric()]
corners2 = [page2.mediaBox.getLowerLeft_x().as_numeric(), page2.mediaBox.getLowerLeft_y().as_numeric(),
page2.mediaBox.getUpperLeft_x().as_numeric(), page2.mediaBox.getUpperLeft_y().as_numeric(),
page2.mediaBox.getUpperRight_x().as_numeric(), page2.mediaBox.getUpperRight_y().as_numeric(),
page2.mediaBox.getLowerRight_x().as_numeric(), page2.mediaBox.getLowerRight_y().as_numeric()]
if ctm is not None:
ctm = [float(x) for x in ctm]
new_x = [ctm[0]*corners2[i] + ctm[2]*corners2[i+1] + ctm[4] for i in range(0, 8, 2)]
new_y = [ctm[1]*corners2[i] + ctm[3]*corners2[i+1] + ctm[5] for i in range(0, 8, 2)]
else:
new_x = corners2[0:8:2]
new_y = corners2[1:8:2]
lowerleft = [min(new_x), min(new_y)]
upperright = [max(new_x), max(new_y)]
lowerleft = [min(corners1[0], lowerleft[0]), min(corners1[1], lowerleft[1])]
upperright = [max(corners1[2], upperright[0]), max(corners1[3], upperright[1])]
self.mediaBox.setLowerLeft(lowerleft)
self.mediaBox.setUpperRight(upperright)
self[NameObject('/Contents')] = ContentStream(newContentArray, self.pdf)
self[NameObject('/Resources')] = newResources
self[NameObject('/Annots')] = newAnnots
def mergeTransformedPage(self, page2, ctm, expand=False):
"""
This is similar to mergePage, but a transformation matrix is
applied to the merged stream.
:param PageObject page2: The page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param tuple ctm: a 6-element tuple containing the operands of the
transformation matrix
:param bool expand: Whether the page should be expanded to fit the dimensions
of the page to be merged.
"""
self._mergePage(page2, lambda page2Content:
PageObject._addTransformationMatrix(page2Content, page2.pdf, ctm), ctm, expand)
def mergeScaledPage(self, page2, scale, expand=False):
"""
This is similar to mergePage, but the stream to be merged is scaled
by appling a transformation matrix.
:param PageObject page2: The page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float scale: The scaling factor
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
# CTM to scale : [ sx 0 0 sy 0 0 ]
return self.mergeTransformedPage(page2, [scale, 0,
0, scale,
0, 0], expand)
def mergeRotatedPage(self, page2, rotation, expand=False):
"""
This is similar to mergePage, but the stream to be merged is rotated
by appling a transformation matrix.
:param PageObject page2: the page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float rotation: The angle of the rotation, in degrees
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
rotation = math.radians(rotation)
return self.mergeTransformedPage(page2,
[math.cos(rotation), math.sin(rotation),
-math.sin(rotation), math.cos(rotation),
0, 0], expand)
def mergeTranslatedPage(self, page2, tx, ty, expand=False):
"""
This is similar to mergePage, but the stream to be merged is translated
by appling a transformation matrix.
:param PageObject page2: the page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float tx: The translation on X axis
:param float ty: The translation on Y axis
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
return self.mergeTransformedPage(page2, [1, 0,
0, 1,
tx, ty], expand)
def mergeRotatedTranslatedPage(self, page2, rotation, tx, ty, expand=False):
"""
This is similar to mergePage, but the stream to be merged is rotated
and translated by appling a transformation matrix.
:param PageObject page2: the page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float tx: The translation on X axis
:param float ty: The translation on Y axis
:param float rotation: The angle of the rotation, in degrees
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
translation = [[1, 0, 0],
[0, 1, 0],
[-tx, -ty, 1]]
rotation = math.radians(rotation)
rotating = [[math.cos(rotation), math.sin(rotation), 0],
[-math.sin(rotation), math.cos(rotation), 0],
[0, 0, 1]]
rtranslation = [[1, 0, 0],
[0, 1, 0],
[tx, ty, 1]]
ctm = utils.matrixMultiply(translation, rotating)
ctm = utils.matrixMultiply(ctm, rtranslation)
return self.mergeTransformedPage(page2, [ctm[0][0], ctm[0][1],
ctm[1][0], ctm[1][1],
ctm[2][0], ctm[2][1]], expand)
def mergeRotatedScaledPage(self, page2, rotation, scale, expand=False):
"""
This is similar to mergePage, but the stream to be merged is rotated
and scaled by appling a transformation matrix.
:param PageObject page2: the page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float rotation: The angle of the rotation, in degrees
:param float scale: The scaling factor
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
rotation = math.radians(rotation)
rotating = [[math.cos(rotation), math.sin(rotation), 0],
[-math.sin(rotation), math.cos(rotation), 0],
[0, 0, 1]]
scaling = [[scale, 0, 0],
[0, scale, 0],
[0, 0, 1]]
ctm = utils.matrixMultiply(rotating, scaling)
return self.mergeTransformedPage(page2,
[ctm[0][0], ctm[0][1],
ctm[1][0], ctm[1][1],
ctm[2][0], ctm[2][1]], expand)
def mergeScaledTranslatedPage(self, page2, scale, tx, ty, expand=False):
"""
This is similar to mergePage, but the stream to be merged is translated
and scaled by appling a transformation matrix.
:param PageObject page2: the page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float scale: The scaling factor
:param float tx: The translation on X axis
:param float ty: The translation on Y axis
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
translation = [[1, 0, 0],
[0, 1, 0],
[tx, ty, 1]]
scaling = [[scale, 0, 0],
[0, scale, 0],
[0, 0, 1]]
ctm = utils.matrixMultiply(scaling, translation)
return self.mergeTransformedPage(page2, [ctm[0][0], ctm[0][1],
ctm[1][0], ctm[1][1],
ctm[2][0], ctm[2][1]], expand)
def mergeRotatedScaledTranslatedPage(self, page2, rotation, scale, tx, ty, expand=False):
"""
This is similar to mergePage, but the stream to be merged is translated,
rotated and scaled by appling a transformation matrix.
:param PageObject page2: the page to be merged into this one. Should be
an instance of :class:`PageObject<PageObject>`.
:param float tx: The translation on X axis
:param float ty: The translation on Y axis
:param float rotation: The angle of the rotation, in degrees
:param float scale: The scaling factor
:param bool expand: Whether the page should be expanded to fit the
dimensions of the page to be merged.
"""
translation = [[1, 0, 0],
[0, 1, 0],
[tx, ty, 1]]
rotation = math.radians(rotation)
rotating = [[math.cos(rotation), math.sin(rotation), 0],
[-math.sin(rotation), math.cos(rotation), 0],
[0, 0, 1]]
scaling = [[scale, 0, 0],
[0, scale, 0],
[0, 0, 1]]
ctm = utils.matrixMultiply(rotating, scaling)
ctm = utils.matrixMultiply(ctm, translation)
return self.mergeTransformedPage(page2, [ctm[0][0], ctm[0][1],
ctm[1][0], ctm[1][1],
ctm[2][0], ctm[2][1]], expand)
##
# Applys a transformation matrix the page.
#
# @param ctm A 6 elements tuple containing the operands of the
# transformation matrix
def addTransformation(self, ctm):
"""
Applies a transformation matrix to the page.
:param tuple ctm: A 6-element tuple containing the operands of the
transformation matrix.
"""
originalContent = self.getContents()
if originalContent is not None:
newContent = PageObject._addTransformationMatrix(
originalContent, self.pdf, ctm)
newContent = PageObject._pushPopGS(newContent, self.pdf)
self[NameObject('/Contents')] = newContent
def scale(self, sx, sy):
"""
Scales a page by the given factors by appling a transformation
matrix to its content and updating the page size.
:param float sx: The scaling factor on horizontal axis.
:param float sy: The scaling factor on vertical axis.
"""
self.addTransformation([sx, 0,
0, sy,
0, 0])
self.mediaBox = RectangleObject([
float(self.mediaBox.getLowerLeft_x()) * sx,
float(self.mediaBox.getLowerLeft_y()) * sy,
float(self.mediaBox.getUpperRight_x()) * sx,
float(self.mediaBox.getUpperRight_y()) * sy])
if "/VP" in self:
viewport = self["/VP"]
if isinstance(viewport, ArrayObject):
bbox = viewport[0]["/BBox"]
else:
bbox = viewport["/BBox"]
scaled_bbox = RectangleObject([
float(bbox[0]) * sx,
float(bbox[1]) * sy,
float(bbox[2]) * sx,
float(bbox[3]) * sy])
if isinstance(viewport, ArrayObject):
self[NameObject("/VP")][NumberObject(0)][NameObject("/BBox")] = scaled_bbox
else:
self[NameObject("/VP")][NameObject("/BBox")] = scaled_bbox
def scaleBy(self, factor):
"""
Scales a page by the given factor by appling a transformation
matrix to its content and updating the page size.
:param float factor: The scaling factor (for both X and Y axis).
"""
self.scale(factor, factor)
def scaleTo(self, width, height):
"""
Scales a page to the specified dimentions by appling a
transformation matrix to its content and updating the page size.
:param float width: The new width.
:param float height: The new heigth.
"""
sx = width / float(self.mediaBox.getUpperRight_x() -
self.mediaBox.getLowerLeft_x ())
sy = height / float(self.mediaBox.getUpperRight_y() -
self.mediaBox.getLowerLeft_y ())
self.scale(sx, sy)
def compressContentStreams(self):
"""
Compresses the size of this page by joining all content streams and
applying a FlateDecode filter.
However, it is possible that this function will perform no action if
content stream compression becomes "automatic" for some reason.
"""
content = self.getContents()
if content is not None:
if not isinstance(content, ContentStream):
content = ContentStream(content, self.pdf)
self[NameObject("/Contents")] = content.flateEncode()
def extractText(self):
"""
Locate all text drawing commands, in the order they are provided in the
content stream, and extract the text. This works well for some PDF
files, but poorly for others, depending on the generator used. This will
be refined in the future. Do not rely on the order of text coming out of
this function, as it will change if this function is made more
sophisticated.
:return: a unicode string object.
"""
text = u_("")
content = self["/Contents"].getObject()
if not isinstance(content, ContentStream):
content = ContentStream(content, self.pdf)
# Note: we check all strings are TextStringObjects. ByteStringObjects
# are strings where the byte->string encoding was unknown, so adding
# them to the text here would be gibberish.
for operands, operator in content.operations:
if operator == b_("Tj"):
_text = operands[0]
if isinstance(_text, TextStringObject):
text += _text
elif operator == b_("T*"):
text += "\n"
elif operator == b_("'"):
text += "\n"
_text = operands[0]
if isinstance(_text, TextStringObject):
text += operands[0]
elif operator == b_('"'):
_text = operands[2]
if isinstance(_text, TextStringObject):
text += "\n"
text += _text
elif operator == b_("TJ"):
for i in operands[0]:
if isinstance(i, TextStringObject):
text += i
text += "\n"
return text
mediaBox = createRectangleAccessor("/MediaBox", ())
"""
A :class:`RectangleObject<PyPDF2.generic.RectangleObject>`, expressed in default user space units,
defining the boundaries of the physical medium on which the page is
intended to be displayed or printed.
"""
cropBox = createRectangleAccessor("/CropBox", ("/MediaBox",))
"""
A :class:`RectangleObject<PyPDF2.generic.RectangleObject>`, expressed in default user space units,
defining the visible region of default user space. When the page is
displayed or printed, its contents are to be clipped (cropped) to this
rectangle and then imposed on the output medium in some
implementation-defined manner. Default value: same as :attr:`mediaBox<mediaBox>`.
"""
bleedBox = createRectangleAccessor("/BleedBox", ("/CropBox", "/MediaBox"))
"""
A :class:`RectangleObject<PyPDF2.generic.RectangleObject>`, expressed in default user space units,
defining the region to which the contents of the page should be clipped
when output in a production enviroment.
"""
trimBox = createRectangleAccessor("/TrimBox", ("/CropBox", "/MediaBox"))
"""
A :class:`RectangleObject<PyPDF2.generic.RectangleObject>`, expressed in default user space units,
defining the intended dimensions of the finished page after trimming.
"""
artBox = createRectangleAccessor("/ArtBox", ("/CropBox", "/MediaBox"))
"""
A :class:`RectangleObject<PyPDF2.generic.RectangleObject>`, expressed in default user space units,
defining the extent of the page's meaningful content as intended by the
page's creator.
"""
class ContentStream(DecodedStreamObject):
def __init__(self, stream, pdf):
self.pdf = pdf
self.operations = []
# stream may be a StreamObject or an ArrayObject containing
# multiple StreamObjects to be cat'd together.
stream = stream.getObject()
if isinstance(stream, ArrayObject):
data = b_("")
for s in stream:
data += s.getObject().getData()
stream = BytesIO(b_(data))
else:
stream = BytesIO(b_(stream.getData()))
self.__parseContentStream(stream)
def __parseContentStream(self, stream):
# file("f:\\tmp.txt", "w").write(stream.read())
stream.seek(0, 0)
operands = []
while True:
peek = readNonWhitespace(stream)
if peek == b_('') or ord_(peek) == 0:
break
stream.seek(-1, 1)
if peek.isalpha() or peek == b_("'") or peek == b_('"'):
operator = utils.readUntilRegex(stream,
NameObject.delimiterPattern, True)
if operator == b_("BI"):
# begin inline image - a completely different parsing
# mechanism is required, of course... thanks buddy...
assert operands == []
ii = self._readInlineImage(stream)
self.operations.append((ii, b_("INLINE IMAGE")))
else:
self.operations.append((operands, operator))
operands = []
elif peek == b_('%'):
# If we encounter a comment in the content stream, we have to
# handle it here. Typically, readObject will handle
# encountering a comment -- but readObject assumes that
# following the comment must be the object we're trying to
# read. In this case, it could be an operator instead.
while peek not in (b_('\r'), b_('\n')):
peek = stream.read(1)
else:
operands.append(readObject(stream, None))
def _readInlineImage(self, stream):
# begin reading just after the "BI" - begin image
# first read the dictionary of settings.
settings = DictionaryObject()
while True:
tok = readNonWhitespace(stream)
stream.seek(-1, 1)
if tok == b_("I"):
# "ID" - begin of image data
break
key = readObject(stream, self.pdf)
tok = readNonWhitespace(stream)
stream.seek(-1, 1)
value = readObject(stream, self.pdf)
settings[key] = value
# left at beginning of ID
tmp = stream.read(3)
assert tmp[:2] == b_("ID")
data = b_("")
while True:
# Read the inline image, while checking for EI (End Image) operator.
tok = stream.read(1)
if tok == b_("E"):
# Check for End Image
tok2 = stream.read(1)
if tok2 == b_("I"):
# Sometimes that data will contain EI, so check for the Q operator.
tok3 = stream.read(1)
info = tok + tok2
while tok3 in utils.WHITESPACES:
info += tok3
tok3 = stream.read(1)
if tok3 == b_("Q"):
stream.seek(-1, 1)
break
else:
stream.seek(-1,1)
data += info
else:
stream.seek(-1, 1)
data += tok
else:
data += tok
return {"settings": settings, "data": data}
def _getData(self):
newdata = BytesIO()
for operands, operator in self.operations:
if operator == "INLINE IMAGE":
newdata.write("BI")
dicttext = StringIO()
operands["settings"].writeToStream(dicttext, None)
newdata.write(dicttext.getvalue()[2:-2])
newdata.write("ID ")
newdata.write(operands["data"])
newdata.write("EI")
else:
for op in operands:
op.writeToStream(newdata, None)
newdata.write(b_(" "))
newdata.write(b_(operator))
newdata.write(b_("\n"))
return newdata.getvalue()
def _setData(self, value):
self.__parseContentStream(BytesIO(b_(value)))
_data = property(_getData, _setData)
class DocumentInformation(DictionaryObject):
"""
A class representing the basic document metadata provided in a PDF File.
This class is accessible through
:meth:`getDocumentInfo()<PyPDF2.PdfFileReader.getDocumentInfo()>`
All text properties of the document metadata have
*two* properties, eg. author and author_raw. The non-raw property will
always return a ``TextStringObject``, making it ideal for a case where
the metadata is being displayed. The raw property can sometimes return
a ``ByteStringObject``, if PyPDF2 was unable to decode the string's
text encoding; this requires additional safety in the caller and
therefore is not as commonly accessed.
"""
def __init__(self):
DictionaryObject.__init__(self)
def getText(self, key):
retval = self.get(key, None)
if isinstance(retval, TextStringObject):
return retval
return None
title = property(lambda self: self.getText("/Title"))
"""Read-only property accessing the document's **title**.
Returns a unicode string (``TextStringObject``) or ``None``
if the title is not specified."""
title_raw = property(lambda self: self.get("/Title"))
"""The "raw" version of title; can return a ``ByteStringObject``."""
author = property(lambda self: self.getText("/Author"))
"""Read-only property accessing the document's **author**.
Returns a unicode string (``TextStringObject``) or ``None``
if the author is not specified."""
author_raw = property(lambda self: self.get("/Author"))
"""The "raw" version of author; can return a ``ByteStringObject``."""
subject = property(lambda self: self.getText("/Subject"))
"""Read-only property accessing the document's **subject**.
Returns a unicode string (``TextStringObject``) or ``None``
if the subject is not specified."""
subject_raw = property(lambda self: self.get("/Subject"))
"""The "raw" version of subject; can return a ``ByteStringObject``."""
creator = property(lambda self: self.getText("/Creator"))
"""Read-only property accessing the document's **creator**. If the
document was converted to PDF from another format, this is the name of the
application (e.g. OpenOffice) that created the original document from
which it was converted. Returns a unicode string (``TextStringObject``)
or ``None`` if the creator is not specified."""
creator_raw = property(lambda self: self.get("/Creator"))
"""The "raw" version of creator; can return a ``ByteStringObject``."""
producer = property(lambda self: self.getText("/Producer"))
"""Read-only property accessing the document's **producer**.
If the document was converted to PDF from another format, this is
the name of the application (for example, OSX Quartz) that converted
it to PDF. Returns a unicode string (``TextStringObject``)
or ``None`` if the producer is not specified."""
producer_raw = property(lambda self: self.get("/Producer"))
"""The "raw" version of producer; can return a ``ByteStringObject``."""
def convertToInt(d, size):
if size > 8:
raise utils.PdfReadError("invalid size in convertToInt")
d = b_("\x00\x00\x00\x00\x00\x00\x00\x00") + b_(d)
d = d[-8:]
return struct.unpack(">q", d)[0]
# ref: pdf1.8 spec section 3.5.2 algorithm 3.2
_encryption_padding = b_('\x28\xbf\x4e\x5e\x4e\x75\x8a\x41\x64\x00\x4e\x56') + \
b_('\xff\xfa\x01\x08\x2e\x2e\x00\xb6\xd0\x68\x3e\x80\x2f\x0c') + \
b_('\xa9\xfe\x64\x53\x69\x7a')
# Implementation of algorithm 3.2 of the PDF standard security handler,
# section 3.5.2 of the PDF 1.6 reference.
def _alg32(password, rev, keylen, owner_entry, p_entry, id1_entry, metadata_encrypt=True):
# 1. Pad or truncate the password string to exactly 32 bytes. If the
# password string is more than 32 bytes long, use only its first 32 bytes;
# if it is less than 32 bytes long, pad it by appending the required number
# of additional bytes from the beginning of the padding string
# (_encryption_padding).
password = b_((str_(password) + str_(_encryption_padding))[:32])
# 2. Initialize the MD5 hash function and pass the result of step 1 as
# input to this function.
import struct
m = md5(password)
# 3. Pass the value of the encryption dictionary's /O entry to the MD5 hash
# function.
m.update(owner_entry.original_bytes)
# 4. Treat the value of the /P entry as an unsigned 4-byte integer and pass
# these bytes to the MD5 hash function, low-order byte first.
p_entry = struct.pack('<i', p_entry)
m.update(p_entry)
# 5. Pass the first element of the file's file identifier array to the MD5
# hash function.
m.update(id1_entry.original_bytes)
# 6. (Revision 3 or greater) If document metadata is not being encrypted,
# pass 4 bytes with the value 0xFFFFFFFF to the MD5 hash function.
if rev >= 3 and not metadata_encrypt:
m.update(b_("\xff\xff\xff\xff"))
# 7. Finish the hash.
md5_hash = m.digest()
# 8. (Revision 3 or greater) Do the following 50 times: Take the output
# from the previous MD5 hash and pass the first n bytes of the output as
# input into a new MD5 hash, where n is the number of bytes of the
# encryption key as defined by the value of the encryption dictionary's
# /Length entry.
if rev >= 3:
for i in range(50):
md5_hash = md5(md5_hash[:keylen]).digest()
# 9. Set the encryption key to the first n bytes of the output from the
# final MD5 hash, where n is always 5 for revision 2 but, for revision 3 or
# greater, depends on the value of the encryption dictionary's /Length
# entry.
return md5_hash[:keylen]
# Implementation of algorithm 3.3 of the PDF standard security handler,
# section 3.5.2 of the PDF 1.6 reference.
def _alg33(owner_pwd, user_pwd, rev, keylen):
# steps 1 - 4
key = _alg33_1(owner_pwd, rev, keylen)
# 5. Pad or truncate the user password string as described in step 1 of
# algorithm 3.2.
user_pwd = b_((user_pwd + str_(_encryption_padding))[:32])
# 6. Encrypt the result of step 5, using an RC4 encryption function with
# the encryption key obtained in step 4.
val = utils.RC4_encrypt(key, user_pwd)
# 7. (Revision 3 or greater) Do the following 19 times: Take the output
# from the previous invocation of the RC4 function and pass it as input to
# a new invocation of the function; use an encryption key generated by
# taking each byte of the encryption key obtained in step 4 and performing
# an XOR operation between that byte and the single-byte value of the
# iteration counter (from 1 to 19).
if rev >= 3:
for i in range(1, 20):
new_key = ''
for l in range(len(key)):
new_key += chr(ord_(key[l]) ^ i)
val = utils.RC4_encrypt(new_key, val)
# 8. Store the output from the final invocation of the RC4 as the value of
# the /O entry in the encryption dictionary.
return val
# Steps 1-4 of algorithm 3.3
def _alg33_1(password, rev, keylen):
# 1. Pad or truncate the owner password string as described in step 1 of
# algorithm 3.2. If there is no owner password, use the user password
# instead.
password = b_((password + str_(_encryption_padding))[:32])
# 2. Initialize the MD5 hash function and pass the result of step 1 as
# input to this function.
m = md5(password)
# 3. (Revision 3 or greater) Do the following 50 times: Take the output
# from the previous MD5 hash and pass it as input into a new MD5 hash.
md5_hash = m.digest()
if rev >= 3:
for i in range(50):
md5_hash = md5(md5_hash).digest()
# 4. Create an RC4 encryption key using the first n bytes of the output
# from the final MD5 hash, where n is always 5 for revision 2 but, for
# revision 3 or greater, depends on the value of the encryption
# dictionary's /Length entry.
key = md5_hash[:keylen]
return key
# Implementation of algorithm 3.4 of the PDF standard security handler,
# section 3.5.2 of the PDF 1.6 reference.
def _alg34(password, owner_entry, p_entry, id1_entry):
# 1. Create an encryption key based on the user password string, as
# described in algorithm 3.2.
key = _alg32(password, 2, 5, owner_entry, p_entry, id1_entry)
# 2. Encrypt the 32-byte padding string shown in step 1 of algorithm 3.2,
# using an RC4 encryption function with the encryption key from the
# preceding step.
U = utils.RC4_encrypt(key, _encryption_padding)
# 3. Store the result of step 2 as the value of the /U entry in the
# encryption dictionary.
return U, key
# Implementation of algorithm 3.4 of the PDF standard security handler,
# section 3.5.2 of the PDF 1.6 reference.
def _alg35(password, rev, keylen, owner_entry, p_entry, id1_entry, metadata_encrypt):
# 1. Create an encryption key based on the user password string, as
# described in Algorithm 3.2.
key = _alg32(password, rev, keylen, owner_entry, p_entry, id1_entry)
# 2. Initialize the MD5 hash function and pass the 32-byte padding string
# shown in step 1 of Algorithm 3.2 as input to this function.
m = md5()
m.update(_encryption_padding)
# 3. Pass the first element of the file's file identifier array (the value
# of the ID entry in the document's trailer dictionary; see Table 3.13 on
# page 73) to the hash function and finish the hash. (See implementation
# note 25 in Appendix H.)
m.update(id1_entry.original_bytes)
md5_hash = m.digest()
# 4. Encrypt the 16-byte result of the hash, using an RC4 encryption
# function with the encryption key from step 1.
val = utils.RC4_encrypt(key, md5_hash)
# 5. Do the following 19 times: Take the output from the previous
# invocation of the RC4 function and pass it as input to a new invocation
# of the function; use an encryption key generated by taking each byte of
# the original encryption key (obtained in step 2) and performing an XOR
# operation between that byte and the single-byte value of the iteration
# counter (from 1 to 19).
for i in range(1, 20):
new_key = b_('')
for l in range(len(key)):
new_key += b_(chr(ord_(key[l]) ^ i))
val = utils.RC4_encrypt(new_key, val)
# 6. Append 16 bytes of arbitrary padding to the output from the final
# invocation of the RC4 function and store the 32-byte result as the value
# of the U entry in the encryption dictionary.
# (implementator note: I don't know what "arbitrary padding" is supposed to
# mean, so I have used null bytes. This seems to match a few other
# people's implementations)
return val + (b_('\x00') * 16), key
|