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
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
3842
3843
3844
3845
3846
3847
3848
3849
3850
3851
3852
3853
3854
3855
3856
3857
3858
3859
3860
3861
3862
3863
3864
3865
3866
3867
3868
3869
3870
3871
3872
3873
3874
3875
3876
3877
3878
3879
3880
3881
3882
3883
3884
3885
3886
3887
3888
3889
3890
3891
3892
3893
3894
3895
3896
3897
3898
3899
3900
3901
3902
3903
3904
3905
3906
3907
3908
3909
3910
3911
3912
3913
3914
3915
3916
3917
3918
3919
3920
3921
3922
3923
3924
3925
3926
3927
3928
3929
3930
3931
3932
3933
3934
3935
3936
3937
3938
3939
3940
3941
3942
3943
3944
3945
3946
3947
3948
3949
3950
3951
3952
3953
3954
3955
3956
3957
3958
3959
3960
3961
3962
3963
3964
3965
3966
3967
3968
3969
3970
3971
3972
3973
3974
3975
3976
3977
3978
3979
3980
3981
3982
3983
3984
3985
3986
3987
3988
3989
3990
3991
3992
3993
3994
3995
3996
3997
3998
3999
4000
4001
4002
4003
4004
4005
4006
4007
4008
4009
4010
4011
4012
4013
4014
4015
4016
4017
4018
4019
4020
4021
4022
4023
4024
4025
4026
4027
4028
4029
4030
4031
4032
4033
4034
4035
4036
4037
4038
4039
4040
4041
4042
4043
4044
4045
4046
4047
4048
4049
4050
4051
4052
4053
4054
4055
4056
4057
4058
4059
4060
4061
4062
4063
4064
4065
4066
4067
4068
4069
4070
4071
4072
4073
4074
4075
4076
4077
4078
4079
4080
4081
4082
4083
4084
4085
4086
4087
4088
4089
4090
4091
4092
4093
4094
4095
4096
4097
4098
4099
4100
4101
4102
4103
4104
4105
4106
4107
4108
4109
4110
4111
4112
4113
4114
4115
4116
4117
4118
4119
4120
4121
4122
4123
4124
4125
4126
4127
4128
4129
4130
4131
4132
4133
4134
4135
4136
4137
4138
4139
4140
4141
4142
4143
4144
4145
4146
4147
4148
4149
4150
4151
4152
4153
4154
4155
4156
4157
4158
4159
4160
4161
4162
4163
4164
4165
4166
4167
4168
4169
4170
4171
4172
4173
4174
4175
4176
4177
4178
4179
4180
4181
4182
4183
4184
4185
4186
4187
4188
4189
4190
4191
4192
4193
4194
4195
4196
4197
4198
4199
4200
4201
4202
4203
4204
4205
4206
4207
4208
4209
4210
4211
4212
4213
4214
4215
4216
4217
4218
4219
4220
4221
4222
4223
4224
4225
4226
4227
4228
4229
4230
4231
4232
4233
4234
4235
|
/*
* Copyright (C) 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
*
* Portions are Copyright (C) 1998 Netscape Communications Corporation.
*
* Other contributors:
* Robert O'Callahan <roc+@cs.cmu.edu>
* David Baron <dbaron@fas.harvard.edu>
* Christian Biesinger <cbiesinger@web.de>
* Randall Jesup <rjesup@wgate.com>
* Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>
* Josh Soref <timeless@mac.com>
* Boris Zbarsky <bzbarsky@mit.edu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Alternatively, the contents of this file may be used under the terms
* of either the Mozilla Public License Version 1.1, found at
* http://www.mozilla.org/MPL/ (the "MPL") or the GNU General Public
* License Version 2.0, found at http://www.fsf.org/copyleft/gpl.html
* (the "GPL"), in which case the provisions of the MPL or the GPL are
* applicable instead of those above. If you wish to allow use of your
* version of this file only under the terms of one of those two
* licenses (the MPL or the GPL) and not to allow others to use your
* version of this file under the LGPL, indicate your decision by
* deletingthe provisions above and replace them with the notice and
* other provisions required by the MPL or the GPL, as the case may be.
* If you do not delete the provisions above, a recipient may use your
* version of this file under any of the LGPL, the MPL or the GPL.
*/
#include "config.h"
#include "RenderLayer.h"
#include "ColumnInfo.h"
#include "CSSPropertyNames.h"
#include "CSSStyleDeclaration.h"
#include "CSSStyleSelector.h"
#include "Chrome.h"
#include "Document.h"
#include "EventHandler.h"
#include "EventQueue.h"
#include "FloatPoint3D.h"
#include "FloatRect.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "Gradient.h"
#include "GraphicsContext.h"
#include "HTMLFrameOwnerElement.h"
#include "HTMLNames.h"
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
#include "HTMLTextAreaElement.h"
#endif
#include "HitTestRequest.h"
#include "HitTestResult.h"
#include "OverflowEvent.h"
#include "OverlapTestRequestClient.h"
#include "Page.h"
#include "PlatformMouseEvent.h"
#include "RenderArena.h"
#include "RenderInline.h"
#include "RenderMarquee.h"
#include "RenderReplica.h"
#include "RenderScrollbar.h"
#include "RenderScrollbarPart.h"
#include "RenderTheme.h"
#include "RenderTreeAsText.h"
#include "RenderView.h"
#include "ScaleTransformOperation.h"
#include "Scrollbar.h"
#include "ScrollbarTheme.h"
#include "SelectionController.h"
#include "TextStream.h"
#include "TransformState.h"
#include "TransformationMatrix.h"
#include "TranslateTransformOperation.h"
#include <wtf/StdLibExtras.h>
#include <wtf/UnusedParam.h>
#include <wtf/text/CString.h>
#if USE(ACCELERATED_COMPOSITING)
#include "RenderLayerBacking.h"
#include "RenderLayerCompositor.h"
#endif
#if ENABLE(SVG)
#include "SVGNames.h"
#endif
#define MIN_INTERSECT_FOR_REVEAL 32
using namespace std;
namespace WebCore {
using namespace HTMLNames;
const int MinimumWidthWhileResizing = 100;
const int MinimumHeightWhileResizing = 40;
void* ClipRects::operator new(size_t sz, RenderArena* renderArena) throw()
{
return renderArena->allocate(sz);
}
void ClipRects::operator delete(void* ptr, size_t sz)
{
// Stash size where destroy can find it.
*(size_t *)ptr = sz;
}
void ClipRects::destroy(RenderArena* renderArena)
{
delete this;
// Recover the size left there for us by operator delete and free the memory.
renderArena->free(*(size_t *)this, this);
}
RenderLayer::RenderLayer(RenderBoxModelObject* renderer)
: m_renderer(renderer)
, m_parent(0)
, m_previous(0)
, m_next(0)
, m_first(0)
, m_last(0)
, m_relX(0)
, m_relY(0)
, m_x(0)
, m_y(0)
, m_width(0)
, m_height(0)
, m_scrollX(0)
, m_scrollY(0)
, m_scrollLeftOverflow(0)
, m_scrollTopOverflow(0)
, m_scrollWidth(0)
, m_scrollHeight(0)
, m_inResizeMode(false)
, m_posZOrderList(0)
, m_negZOrderList(0)
, m_normalFlowList(0)
, m_clipRects(0)
#ifndef NDEBUG
, m_clipRectsRoot(0)
#endif
, m_scrollDimensionsDirty(true)
, m_zOrderListsDirty(true)
, m_normalFlowListDirty(true)
, m_isNormalFlowOnly(shouldBeNormalFlowOnly())
, m_usedTransparency(false)
, m_paintingInsideReflection(false)
, m_inOverflowRelayout(false)
, m_needsFullRepaint(false)
, m_overflowStatusDirty(true)
, m_visibleContentStatusDirty(true)
, m_hasVisibleContent(false)
, m_visibleDescendantStatusDirty(false)
, m_hasVisibleDescendant(false)
, m_isPaginated(false)
, m_3DTransformedDescendantStatusDirty(true)
, m_has3DTransformedDescendant(false)
#if USE(ACCELERATED_COMPOSITING)
, m_hasCompositingDescendant(false)
, m_mustOverlapCompositedLayers(false)
#if ENABLE(COMPOSITED_FIXED_ELEMENTS)
, m_shouldComposite(false)
#endif
#endif
, m_containsDirtyOverlayScrollbars(false)
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
, m_hasOverflowScroll(false)
#endif
, m_marquee(0)
, m_staticInlinePosition(0)
, m_staticBlockPosition(0)
, m_reflection(0)
, m_scrollCorner(0)
, m_resizer(0)
{
ScrollableArea::setConstrainsScrollingToContentEdge(false);
if (!renderer->firstChild() && renderer->style()) {
m_visibleContentStatusDirty = false;
m_hasVisibleContent = renderer->style()->visibility() == VISIBLE;
}
if (Frame* frame = renderer->frame()) {
if (Page* page = frame->page()) {
m_page = page;
m_page->addScrollableArea(this);
}
}
}
RenderLayer::~RenderLayer()
{
if (inResizeMode() && !renderer()->documentBeingDestroyed()) {
if (Frame* frame = renderer()->frame())
frame->eventHandler()->resizeLayerDestroyed();
}
if (m_page)
m_page->removeScrollableArea(this);
destroyScrollbar(HorizontalScrollbar);
destroyScrollbar(VerticalScrollbar);
if (m_reflection)
removeReflection();
// Child layers will be deleted by their corresponding render objects, so
// we don't need to delete them ourselves.
delete m_posZOrderList;
delete m_negZOrderList;
delete m_normalFlowList;
delete m_marquee;
#if USE(ACCELERATED_COMPOSITING)
clearBacking();
#endif
// Make sure we have no lingering clip rects.
ASSERT(!m_clipRects);
if (m_scrollCorner)
m_scrollCorner->destroy();
if (m_resizer)
m_resizer->destroy();
}
#if USE(ACCELERATED_COMPOSITING)
RenderLayerCompositor* RenderLayer::compositor() const
{
ASSERT(renderer()->view());
return renderer()->view()->compositor();
}
void RenderLayer::contentChanged(ContentChangeType changeType)
{
// This can get called when video becomes accelerated, so the layers may change.
if ((changeType == CanvasChanged || changeType == VideoChanged || changeType == FullScreenChanged) && compositor()->updateLayerCompositingState(this))
compositor()->setCompositingLayersNeedRebuild();
if (m_backing)
m_backing->contentChanged(changeType);
}
#endif // USE(ACCELERATED_COMPOSITING)
bool RenderLayer::hasAcceleratedCompositing() const
{
#if USE(ACCELERATED_COMPOSITING)
return compositor()->hasAcceleratedCompositing();
#else
return false;
#endif
}
bool RenderLayer::canRender3DTransforms() const
{
#if USE(ACCELERATED_COMPOSITING)
return compositor()->canRender3DTransforms();
#else
return false;
#endif
}
void RenderLayer::updateLayerPositions(UpdateLayerPositionsFlags flags, IntPoint* cachedOffset)
{
updateLayerPosition(); // For relpositioned layers or non-positioned layers,
// we need to keep in sync, since we may have shifted relative
// to our parent layer.
IntPoint oldCachedOffset;
if (cachedOffset) {
// We can't cache our offset to the repaint container if the mapping is anything more complex than a simple translation
bool disableOffsetCache = renderer()->hasColumns() || renderer()->hasTransform() || isComposited();
#if ENABLE(SVG)
disableOffsetCache = disableOffsetCache || renderer()->isSVGRoot();
#endif
if (disableOffsetCache)
cachedOffset = 0; // If our cached offset is invalid make sure it's not passed to any of our children
else {
oldCachedOffset = *cachedOffset;
// Frequently our parent layer's renderer will be the same as our renderer's containing block. In that case,
// we just update the cache using our offset to our parent (which is m_x / m_y). Otherwise, regenerated cached
// offsets to the root from the render tree.
if (!m_parent || m_parent->renderer() == renderer()->containingBlock())
cachedOffset->move(m_x, m_y); // Fast case
else {
int x = 0;
int y = 0;
convertToLayerCoords(root(), x, y);
*cachedOffset = IntPoint(x, y);
}
}
}
int x = 0;
int y = 0;
if (cachedOffset) {
x += cachedOffset->x();
y += cachedOffset->y();
#ifndef NDEBUG
int nonCachedX = 0;
int nonCachedY = 0;
convertToLayerCoords(root(), nonCachedX, nonCachedY);
ASSERT(x == nonCachedX);
ASSERT(y == nonCachedY);
#endif
} else
convertToLayerCoords(root(), x, y);
positionOverflowControls(x, y);
updateVisibilityStatus();
if (flags & UpdatePagination)
updatePagination();
else
m_isPaginated = false;
if (m_hasVisibleContent) {
RenderView* view = renderer()->view();
ASSERT(view);
// FIXME: Optimize using LayoutState and remove the disableLayoutState() call
// from updateScrollInfoAfterLayout().
ASSERT(!view->layoutStateEnabled());
RenderBoxModelObject* repaintContainer = renderer()->containerForRepaint();
IntRect newRect = renderer()->clippedOverflowRectForRepaint(repaintContainer);
IntRect newOutlineBox = renderer()->outlineBoundsForRepaint(repaintContainer, cachedOffset);
// FIXME: Should ASSERT that value calculated for newOutlineBox using the cached offset is the same
// as the value not using the cached offset, but we can't due to https://bugs.webkit.org/show_bug.cgi?id=37048
if (flags & CheckForRepaint) {
if (view && !view->printing()) {
if (m_needsFullRepaint) {
renderer()->repaintUsingContainer(repaintContainer, m_repaintRect);
if (newRect != m_repaintRect)
renderer()->repaintUsingContainer(repaintContainer, newRect);
} else
renderer()->repaintAfterLayoutIfNeeded(repaintContainer, m_repaintRect, m_outlineBox, &newRect, &newOutlineBox);
}
}
m_repaintRect = newRect;
m_outlineBox = newOutlineBox;
} else {
m_repaintRect = IntRect();
m_outlineBox = IntRect();
}
m_needsFullRepaint = false;
// Go ahead and update the reflection's position and size.
if (m_reflection)
m_reflection->layout();
#if USE(ACCELERATED_COMPOSITING)
// Clear the IsCompositingUpdateRoot flag once we've found the first compositing layer in this update.
bool isUpdateRoot = (flags & IsCompositingUpdateRoot);
if (isComposited())
flags &= ~IsCompositingUpdateRoot;
#endif
if (renderer()->hasColumns())
flags |= UpdatePagination;
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
child->updateLayerPositions(flags, cachedOffset);
#if USE(ACCELERATED_COMPOSITING)
if ((flags & UpdateCompositingLayers) && isComposited())
backing()->updateAfterLayout(RenderLayerBacking::CompositingChildren, isUpdateRoot);
#endif
// With all our children positioned, now update our marquee if we need to.
if (m_marquee)
m_marquee->updateMarqueePosition();
if (cachedOffset)
*cachedOffset = oldCachedOffset;
}
IntRect RenderLayer::repaintRectIncludingDescendants() const
{
IntRect repaintRect = m_repaintRect;
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
repaintRect.unite(child->repaintRectIncludingDescendants());
return repaintRect;
}
void RenderLayer::computeRepaintRects()
{
RenderBoxModelObject* repaintContainer = renderer()->containerForRepaint();
m_repaintRect = renderer()->clippedOverflowRectForRepaint(repaintContainer);
m_outlineBox = renderer()->outlineBoundsForRepaint(repaintContainer);
}
void RenderLayer::updateRepaintRectsAfterScroll(bool fixed)
{
if (fixed || renderer()->style()->position() == FixedPosition) {
computeRepaintRects();
fixed = true;
} else if (renderer()->hasTransform() && !renderer()->isRenderView()) {
// Transforms act as fixed position containers, so nothing inside a
// transformed element can be fixed relative to the viewport if the
// transformed element is not fixed itself or child of a fixed element.
return;
}
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
child->updateRepaintRectsAfterScroll(fixed);
}
void RenderLayer::updateTransform()
{
// hasTransform() on the renderer is also true when there is transform-style: preserve-3d or perspective set,
// so check style too.
bool hasTransform = renderer()->hasTransform() && renderer()->style()->hasTransform();
bool had3DTransform = has3DTransform();
bool hadTransform = m_transform;
if (hasTransform != hadTransform) {
if (hasTransform)
m_transform.set(new TransformationMatrix);
else
m_transform.clear();
}
if (hasTransform) {
RenderBox* box = renderBox();
ASSERT(box);
m_transform->makeIdentity();
box->style()->applyTransform(*m_transform, box->borderBoxRect().size(), RenderStyle::IncludeTransformOrigin);
makeMatrixRenderable(*m_transform, canRender3DTransforms());
}
if (had3DTransform != has3DTransform())
dirty3DTransformedDescendantStatus();
}
TransformationMatrix RenderLayer::currentTransform() const
{
if (!m_transform)
return TransformationMatrix();
#if USE(ACCELERATED_COMPOSITING)
if (renderer()->style()->isRunningAcceleratedAnimation()) {
TransformationMatrix currTransform;
RefPtr<RenderStyle> style = renderer()->animation()->getAnimatedStyleForRenderer(renderer());
style->applyTransform(currTransform, renderBox()->borderBoxRect().size(), RenderStyle::IncludeTransformOrigin);
makeMatrixRenderable(currTransform, canRender3DTransforms());
return currTransform;
}
#endif
return *m_transform;
}
TransformationMatrix RenderLayer::renderableTransform(PaintBehavior paintBehavior) const
{
if (!m_transform)
return TransformationMatrix();
if (paintBehavior & PaintBehaviorFlattenCompositingLayers) {
TransformationMatrix matrix = *m_transform;
makeMatrixRenderable(matrix, false /* flatten 3d */);
return matrix;
}
return *m_transform;
}
static bool checkContainingBlockChainForPagination(RenderBoxModelObject* renderer, RenderBox* ancestorColumnsRenderer)
{
RenderView* view = renderer->view();
RenderBoxModelObject* prevBlock = renderer;
RenderBlock* containingBlock;
for (containingBlock = renderer->containingBlock();
containingBlock && containingBlock != view && containingBlock != ancestorColumnsRenderer;
containingBlock = containingBlock->containingBlock())
prevBlock = containingBlock;
// If the columns block wasn't in our containing block chain, then we aren't paginated by it.
if (containingBlock != ancestorColumnsRenderer)
return false;
// If the previous block is absolutely positioned, then we can't be paginated by the columns block.
if (prevBlock->isPositioned())
return false;
// Otherwise we are paginated by the columns block.
return true;
}
void RenderLayer::updatePagination()
{
m_isPaginated = false;
if (isComposited() || !parent())
return; // FIXME: We will have to deal with paginated compositing layers someday.
// FIXME: For now the RenderView can't be paginated. Eventually printing will move to a model where it is though.
if (isNormalFlowOnly()) {
m_isPaginated = parent()->renderer()->hasColumns();
return;
}
// If we're not normal flow, then we need to look for a multi-column object between us and our stacking context.
RenderLayer* ancestorStackingContext = stackingContext();
for (RenderLayer* curr = parent(); curr; curr = curr->parent()) {
if (curr->renderer()->hasColumns()) {
m_isPaginated = checkContainingBlockChainForPagination(renderer(), curr->renderBox());
return;
}
if (curr == ancestorStackingContext)
return;
}
}
void RenderLayer::setHasVisibleContent(bool b)
{
if (m_hasVisibleContent == b && !m_visibleContentStatusDirty)
return;
m_visibleContentStatusDirty = false;
m_hasVisibleContent = b;
if (m_hasVisibleContent) {
RenderBoxModelObject* repaintContainer = renderer()->containerForRepaint();
m_repaintRect = renderer()->clippedOverflowRectForRepaint(repaintContainer);
m_outlineBox = renderer()->outlineBoundsForRepaint(repaintContainer);
if (!isNormalFlowOnly()) {
for (RenderLayer* sc = stackingContext(); sc; sc = sc->stackingContext()) {
sc->dirtyZOrderLists();
if (sc->hasVisibleContent())
break;
}
}
}
if (parent())
parent()->childVisibilityChanged(m_hasVisibleContent);
}
void RenderLayer::dirtyVisibleContentStatus()
{
m_visibleContentStatusDirty = true;
if (parent())
parent()->dirtyVisibleDescendantStatus();
}
void RenderLayer::childVisibilityChanged(bool newVisibility)
{
if (m_hasVisibleDescendant == newVisibility || m_visibleDescendantStatusDirty)
return;
if (newVisibility) {
RenderLayer* l = this;
while (l && !l->m_visibleDescendantStatusDirty && !l->m_hasVisibleDescendant) {
l->m_hasVisibleDescendant = true;
l = l->parent();
}
} else
dirtyVisibleDescendantStatus();
}
void RenderLayer::dirtyVisibleDescendantStatus()
{
RenderLayer* l = this;
while (l && !l->m_visibleDescendantStatusDirty) {
l->m_visibleDescendantStatusDirty = true;
l = l->parent();
}
}
void RenderLayer::updateVisibilityStatus()
{
if (m_visibleDescendantStatusDirty) {
m_hasVisibleDescendant = false;
for (RenderLayer* child = firstChild(); child; child = child->nextSibling()) {
child->updateVisibilityStatus();
if (child->m_hasVisibleContent || child->m_hasVisibleDescendant) {
m_hasVisibleDescendant = true;
break;
}
}
m_visibleDescendantStatusDirty = false;
}
if (m_visibleContentStatusDirty) {
if (renderer()->style()->visibility() == VISIBLE)
m_hasVisibleContent = true;
else {
// layer may be hidden but still have some visible content, check for this
m_hasVisibleContent = false;
RenderObject* r = renderer()->firstChild();
while (r) {
if (r->style()->visibility() == VISIBLE && !r->hasLayer()) {
m_hasVisibleContent = true;
break;
}
if (r->firstChild() && !r->hasLayer())
r = r->firstChild();
else if (r->nextSibling())
r = r->nextSibling();
else {
do {
r = r->parent();
if (r == renderer())
r = 0;
} while (r && !r->nextSibling());
if (r)
r = r->nextSibling();
}
}
}
m_visibleContentStatusDirty = false;
}
}
void RenderLayer::dirty3DTransformedDescendantStatus()
{
RenderLayer* curr = stackingContext();
if (curr)
curr->m_3DTransformedDescendantStatusDirty = true;
// This propagates up through preserve-3d hierarchies to the enclosing flattening layer.
// Note that preserves3D() creates stacking context, so we can just run up the stacking contexts.
while (curr && curr->preserves3D()) {
curr->m_3DTransformedDescendantStatusDirty = true;
curr = curr->stackingContext();
}
}
// Return true if this layer or any preserve-3d descendants have 3d.
bool RenderLayer::update3DTransformedDescendantStatus()
{
if (m_3DTransformedDescendantStatusDirty) {
m_has3DTransformedDescendant = false;
// Transformed or preserve-3d descendants can only be in the z-order lists, not
// in the normal flow list, so we only need to check those.
if (m_posZOrderList) {
for (unsigned i = 0; i < m_posZOrderList->size(); ++i)
m_has3DTransformedDescendant |= m_posZOrderList->at(i)->update3DTransformedDescendantStatus();
}
// Now check our negative z-index children.
if (m_negZOrderList) {
for (unsigned i = 0; i < m_negZOrderList->size(); ++i)
m_has3DTransformedDescendant |= m_negZOrderList->at(i)->update3DTransformedDescendantStatus();
}
m_3DTransformedDescendantStatusDirty = false;
}
// If we live in a 3d hierarchy, then the layer at the root of that hierarchy needs
// the m_has3DTransformedDescendant set.
if (preserves3D())
return has3DTransform() || m_has3DTransformedDescendant;
return has3DTransform();
}
void RenderLayer::updateLayerPosition()
{
IntPoint localPoint;
IntSize inlineBoundingBoxOffset; // We don't put this into the RenderLayer x/y for inlines, so we need to subtract it out when done.
if (renderer()->isRenderInline()) {
RenderInline* inlineFlow = toRenderInline(renderer());
IntRect lineBox = inlineFlow->linesBoundingBox();
setWidth(lineBox.width());
setHeight(lineBox.height());
inlineBoundingBoxOffset = IntSize(lineBox.x(), lineBox.y());
localPoint += inlineBoundingBoxOffset;
} else if (RenderBox* box = renderBox()) {
setWidth(box->width());
setHeight(box->height());
localPoint += box->locationOffsetIncludingFlipping();
}
// Clear our cached clip rect information.
clearClipRects();
if (!renderer()->isPositioned() && renderer()->parent()) {
// We must adjust our position by walking up the render tree looking for the
// nearest enclosing object with a layer.
RenderObject* curr = renderer()->parent();
while (curr && !curr->hasLayer()) {
if (curr->isBox() && !curr->isTableRow()) {
// Rows and cells share the same coordinate space (that of the section).
// Omit them when computing our xpos/ypos.
localPoint += toRenderBox(curr)->locationOffsetIncludingFlipping();
}
curr = curr->parent();
}
if (curr->isBox() && curr->isTableRow()) {
// Put ourselves into the row coordinate space.
localPoint -= toRenderBox(curr)->locationOffsetIncludingFlipping();
}
}
// Subtract our parent's scroll offset.
if (renderer()->isPositioned() && enclosingPositionedAncestor()) {
RenderLayer* positionedParent = enclosingPositionedAncestor();
// For positioned layers, we subtract out the enclosing positioned layer's scroll offset.
IntSize offset = positionedParent->scrolledContentOffset();
localPoint -= offset;
if (renderer()->isPositioned() && positionedParent->renderer()->isRelPositioned() && positionedParent->renderer()->isRenderInline()) {
IntSize offset = toRenderInline(positionedParent->renderer())->relativePositionedInlineOffset(toRenderBox(renderer()));
localPoint += offset;
}
} else if (parent()) {
if (isComposited()) {
// FIXME: Composited layers ignore pagination, so about the best we can do is make sure they're offset into the appropriate column.
// They won't split across columns properly.
IntSize columnOffset;
parent()->renderer()->adjustForColumns(columnOffset, localPoint);
localPoint += columnOffset;
}
IntSize scrollOffset = parent()->scrolledContentOffset();
localPoint -= scrollOffset;
}
m_relX = m_relY = 0;
if (renderer()->isRelPositioned()) {
m_relX = renderer()->relativePositionOffsetX();
m_relY = renderer()->relativePositionOffsetY();
localPoint.move(m_relX, m_relY);
}
// FIXME: We'd really like to just get rid of the concept of a layer rectangle and rely on the renderers.
localPoint -= inlineBoundingBoxOffset;
setLocation(localPoint.x(), localPoint.y());
}
TransformationMatrix RenderLayer::perspectiveTransform() const
{
if (!renderer()->hasTransform())
return TransformationMatrix();
RenderStyle* style = renderer()->style();
if (!style->hasPerspective())
return TransformationMatrix();
// Maybe fetch the perspective from the backing?
const IntRect borderBox = toRenderBox(renderer())->borderBoxRect();
const float boxWidth = borderBox.width();
const float boxHeight = borderBox.height();
float perspectiveOriginX = style->perspectiveOriginX().calcFloatValue(boxWidth);
float perspectiveOriginY = style->perspectiveOriginY().calcFloatValue(boxHeight);
// A perspective origin of 0,0 makes the vanishing point in the center of the element.
// We want it to be in the top-left, so subtract half the height and width.
perspectiveOriginX -= boxWidth / 2.0f;
perspectiveOriginY -= boxHeight / 2.0f;
TransformationMatrix t;
t.translate(perspectiveOriginX, perspectiveOriginY);
t.applyPerspective(style->perspective());
t.translate(-perspectiveOriginX, -perspectiveOriginY);
return t;
}
FloatPoint RenderLayer::perspectiveOrigin() const
{
if (!renderer()->hasTransform())
return FloatPoint();
const IntRect borderBox = toRenderBox(renderer())->borderBoxRect();
RenderStyle* style = renderer()->style();
return FloatPoint(style->perspectiveOriginX().calcFloatValue(borderBox.width()),
style->perspectiveOriginY().calcFloatValue(borderBox.height()));
}
RenderLayer* RenderLayer::stackingContext() const
{
RenderLayer* layer = parent();
#if ENABLE(COMPOSITED_FIXED_ELEMENTS) || ENABLE(ANDROID_OVERFLOW_SCROLL)
// When using composited fixed elements, they are turned into a stacking
// context and we thus need to return them.
// We can simplify the while loop by using isStackingContext(); with
// composited fixed elements turned on, this will return true for them,
// and is otherwise equivalent to the replaced statements.
while (layer && !layer->renderer()->isRoot() && !layer->isStackingContext())
#else
while (layer && !layer->renderer()->isRenderView() && !layer->renderer()->isRoot() && layer->renderer()->style()->hasAutoZIndex())
#endif
layer = layer->parent();
return layer;
}
static inline bool isPositionedContainer(RenderLayer* layer)
{
RenderObject* o = layer->renderer();
return o->isRenderView() || o->isPositioned() || o->isRelPositioned() || layer->hasTransform();
}
static inline bool isFixedPositionedContainer(RenderLayer* layer)
{
RenderObject* o = layer->renderer();
return o->isRenderView() || layer->hasTransform();
}
RenderLayer* RenderLayer::enclosingPositionedAncestor() const
{
RenderLayer* curr = parent();
while (curr && !isPositionedContainer(curr))
curr = curr->parent();
return curr;
}
RenderLayer* RenderLayer::enclosingTransformedAncestor() const
{
RenderLayer* curr = parent();
while (curr && !curr->renderer()->isRenderView() && !curr->transform())
curr = curr->parent();
return curr;
}
static inline const RenderLayer* compositingContainer(const RenderLayer* layer)
{
return layer->isNormalFlowOnly() ? layer->parent() : layer->stackingContext();
}
#if USE(ACCELERATED_COMPOSITING)
RenderLayer* RenderLayer::enclosingCompositingLayer(bool includeSelf) const
{
if (includeSelf && isComposited())
return const_cast<RenderLayer*>(this);
for (const RenderLayer* curr = compositingContainer(this); curr; curr = compositingContainer(curr)) {
if (curr->isComposited())
return const_cast<RenderLayer*>(curr);
}
return 0;
}
#endif
RenderLayer* RenderLayer::clippingRoot() const
{
#if USE(ACCELERATED_COMPOSITING)
if (isComposited())
return const_cast<RenderLayer*>(this);
#endif
const RenderLayer* current = this;
while (current) {
if (current->renderer()->isRenderView())
return const_cast<RenderLayer*>(current);
current = compositingContainer(current);
ASSERT(current);
if (current->transform()
#if USE(ACCELERATED_COMPOSITING)
|| current->isComposited()
#endif
)
return const_cast<RenderLayer*>(current);
}
ASSERT_NOT_REACHED();
return 0;
}
IntPoint RenderLayer::absoluteToContents(const IntPoint& absolutePoint) const
{
// We don't use convertToLayerCoords because it doesn't know about transforms
return roundedIntPoint(renderer()->absoluteToLocal(absolutePoint, false, true));
}
bool RenderLayer::requiresSlowRepaints() const
{
if (isTransparent() || hasReflection() || hasTransform())
return true;
if (!parent())
return false;
return parent()->requiresSlowRepaints();
}
bool RenderLayer::isTransparent() const
{
#if ENABLE(SVG)
if (renderer()->node() && renderer()->node()->namespaceURI() == SVGNames::svgNamespaceURI)
return false;
#endif
return renderer()->isTransparent() || renderer()->hasMask();
}
RenderLayer* RenderLayer::transparentPaintingAncestor()
{
if (isComposited())
return 0;
for (RenderLayer* curr = parent(); curr; curr = curr->parent()) {
if (curr->isComposited())
return 0;
if (curr->isTransparent())
return curr;
}
return 0;
}
static IntRect transparencyClipBox(const RenderLayer* l, const RenderLayer* rootLayer, PaintBehavior paintBehavior);
static void expandClipRectForDescendantsAndReflection(IntRect& clipRect, const RenderLayer* l, const RenderLayer* rootLayer, PaintBehavior paintBehavior)
{
// If we have a mask, then the clip is limited to the border box area (and there is
// no need to examine child layers).
if (!l->renderer()->hasMask()) {
// Note: we don't have to walk z-order lists since transparent elements always establish
// a stacking context. This means we can just walk the layer tree directly.
for (RenderLayer* curr = l->firstChild(); curr; curr = curr->nextSibling()) {
if (!l->reflection() || l->reflectionLayer() != curr)
clipRect.unite(transparencyClipBox(curr, rootLayer, paintBehavior));
}
}
// If we have a reflection, then we need to account for that when we push the clip. Reflect our entire
// current transparencyClipBox to catch all child layers.
// FIXME: Accelerated compositing will eventually want to do something smart here to avoid incorporating this
// size into the parent layer.
if (l->renderer()->hasReflection()) {
int deltaX = 0;
int deltaY = 0;
l->convertToLayerCoords(rootLayer, deltaX, deltaY);
clipRect.move(-deltaX, -deltaY);
clipRect.unite(l->renderBox()->reflectedRect(clipRect));
clipRect.move(deltaX, deltaY);
}
}
static IntRect transparencyClipBox(const RenderLayer* l, const RenderLayer* rootLayer, PaintBehavior paintBehavior)
{
// FIXME: Although this function completely ignores CSS-imposed clipping, we did already intersect with the
// paintDirtyRect, and that should cut down on the amount we have to paint. Still it
// would be better to respect clips.
if (rootLayer != l && l->paintsWithTransform(paintBehavior)) {
// The best we can do here is to use enclosed bounding boxes to establish a "fuzzy" enough clip to encompass
// the transformed layer and all of its children.
int x = 0;
int y = 0;
l->convertToLayerCoords(rootLayer, x, y);
TransformationMatrix transform;
transform.translate(x, y);
transform = transform * *l->transform();
IntRect clipRect = l->boundingBox(l);
expandClipRectForDescendantsAndReflection(clipRect, l, l, paintBehavior);
return transform.mapRect(clipRect);
}
IntRect clipRect = l->boundingBox(rootLayer);
expandClipRectForDescendantsAndReflection(clipRect, l, rootLayer, paintBehavior);
return clipRect;
}
void RenderLayer::beginTransparencyLayers(GraphicsContext* p, const RenderLayer* rootLayer, PaintBehavior paintBehavior)
{
if (p->paintingDisabled() || (paintsWithTransparency(paintBehavior) && m_usedTransparency))
return;
RenderLayer* ancestor = transparentPaintingAncestor();
if (ancestor)
ancestor->beginTransparencyLayers(p, rootLayer, paintBehavior);
if (paintsWithTransparency(paintBehavior)) {
m_usedTransparency = true;
p->save();
IntRect clipRect = transparencyClipBox(this, rootLayer, paintBehavior);
p->clip(clipRect);
p->beginTransparencyLayer(renderer()->opacity());
#ifdef REVEAL_TRANSPARENCY_LAYERS
p->setFillColor(Color(0.0f, 0.0f, 0.5f, 0.2f), ColorSpaceDeviceRGB);
p->fillRect(clipRect);
#endif
}
}
void* RenderLayer::operator new(size_t sz, RenderArena* renderArena) throw()
{
return renderArena->allocate(sz);
}
void RenderLayer::operator delete(void* ptr, size_t sz)
{
// Stash size where destroy can find it.
*(size_t *)ptr = sz;
}
void RenderLayer::destroy(RenderArena* renderArena)
{
delete this;
// Recover the size left there for us by operator delete and free the memory.
renderArena->free(*(size_t *)this, this);
}
void RenderLayer::addChild(RenderLayer* child, RenderLayer* beforeChild)
{
RenderLayer* prevSibling = beforeChild ? beforeChild->previousSibling() : lastChild();
if (prevSibling) {
child->setPreviousSibling(prevSibling);
prevSibling->setNextSibling(child);
ASSERT(prevSibling != child);
} else
setFirstChild(child);
if (beforeChild) {
beforeChild->setPreviousSibling(child);
child->setNextSibling(beforeChild);
ASSERT(beforeChild != child);
} else
setLastChild(child);
child->setParent(this);
if (child->isNormalFlowOnly())
dirtyNormalFlowList();
if (!child->isNormalFlowOnly() || child->firstChild()) {
// Dirty the z-order list in which we are contained. The stackingContext() can be null in the
// case where we're building up generated content layers. This is ok, since the lists will start
// off dirty in that case anyway.
child->dirtyStackingContextZOrderLists();
}
child->updateVisibilityStatus();
if (child->m_hasVisibleContent || child->m_hasVisibleDescendant)
childVisibilityChanged(true);
#if USE(ACCELERATED_COMPOSITING)
compositor()->layerWasAdded(this, child);
#endif
}
RenderLayer* RenderLayer::removeChild(RenderLayer* oldChild)
{
#if USE(ACCELERATED_COMPOSITING)
if (!renderer()->documentBeingDestroyed())
compositor()->layerWillBeRemoved(this, oldChild);
#endif
// remove the child
if (oldChild->previousSibling())
oldChild->previousSibling()->setNextSibling(oldChild->nextSibling());
if (oldChild->nextSibling())
oldChild->nextSibling()->setPreviousSibling(oldChild->previousSibling());
if (m_first == oldChild)
m_first = oldChild->nextSibling();
if (m_last == oldChild)
m_last = oldChild->previousSibling();
if (oldChild->isNormalFlowOnly())
dirtyNormalFlowList();
if (!oldChild->isNormalFlowOnly() || oldChild->firstChild()) {
// Dirty the z-order list in which we are contained. When called via the
// reattachment process in removeOnlyThisLayer, the layer may already be disconnected
// from the main layer tree, so we need to null-check the |stackingContext| value.
oldChild->dirtyStackingContextZOrderLists();
}
oldChild->setPreviousSibling(0);
oldChild->setNextSibling(0);
oldChild->setParent(0);
oldChild->updateVisibilityStatus();
if (oldChild->m_hasVisibleContent || oldChild->m_hasVisibleDescendant)
childVisibilityChanged(false);
return oldChild;
}
void RenderLayer::removeOnlyThisLayer()
{
if (!m_parent)
return;
// Mark that we are about to lose our layer. This makes render tree
// walks ignore this layer while we're removing it.
m_renderer->setHasLayer(false);
#if USE(ACCELERATED_COMPOSITING)
compositor()->layerWillBeRemoved(m_parent, this);
#endif
// Dirty the clip rects.
clearClipRectsIncludingDescendants();
// Remove us from the parent.
RenderLayer* parent = m_parent;
RenderLayer* nextSib = nextSibling();
parent->removeChild(this);
if (reflection())
removeChild(reflectionLayer());
// Now walk our kids and reattach them to our parent.
RenderLayer* current = m_first;
while (current) {
RenderLayer* next = current->nextSibling();
removeChild(current);
parent->addChild(current, nextSib);
current->setNeedsFullRepaint();
current->updateLayerPositions(); // Depends on hasLayer() already being false for proper layout.
current = next;
}
m_renderer->destroyLayer();
}
void RenderLayer::insertOnlyThisLayer()
{
if (!m_parent && renderer()->parent()) {
// We need to connect ourselves when our renderer() has a parent.
// Find our enclosingLayer and add ourselves.
RenderLayer* parentLayer = renderer()->parent()->enclosingLayer();
ASSERT(parentLayer);
RenderLayer* beforeChild = parentLayer->reflectionLayer() != this ? renderer()->parent()->findNextLayer(parentLayer, renderer()) : 0;
parentLayer->addChild(this, beforeChild);
}
// Remove all descendant layers from the hierarchy and add them to the new position.
for (RenderObject* curr = renderer()->firstChild(); curr; curr = curr->nextSibling())
curr->moveLayers(m_parent, this);
// Clear out all the clip rects.
clearClipRectsIncludingDescendants();
}
void
RenderLayer::convertToLayerCoords(const RenderLayer* ancestorLayer, int& xPos, int& yPos) const
{
if (ancestorLayer == this)
return;
EPosition position = renderer()->style()->position();
if (position == FixedPosition && (!ancestorLayer || ancestorLayer == renderer()->view()->layer())) {
// If the fixed layer's container is the root, just add in the offset of the view. We can obtain this by calling
// localToAbsolute() on the RenderView.
FloatPoint absPos = renderer()->localToAbsolute(FloatPoint(), true);
xPos += absPos.x();
yPos += absPos.y();
return;
}
if (position == FixedPosition) {
// For a fixed layers, we need to walk up to the root to see if there's a fixed position container
// (e.g. a transformed layer). It's an error to call convertToLayerCoords() across a layer with a transform,
// so we should always find the ancestor at or before we find the fixed position container.
RenderLayer* fixedPositionContainerLayer = 0;
bool foundAncestor = false;
for (RenderLayer* currLayer = parent(); currLayer; currLayer = currLayer->parent()) {
if (currLayer == ancestorLayer)
foundAncestor = true;
if (isFixedPositionedContainer(currLayer)) {
fixedPositionContainerLayer = currLayer;
ASSERT(foundAncestor);
break;
}
}
ASSERT(fixedPositionContainerLayer); // We should have hit the RenderView's layer at least.
if (fixedPositionContainerLayer != ancestorLayer) {
int fixedContainerX = 0;
int fixedContainerY = 0;
convertToLayerCoords(fixedPositionContainerLayer, fixedContainerX, fixedContainerY);
int ancestorX = 0;
int ancestorY = 0;
ancestorLayer->convertToLayerCoords(fixedPositionContainerLayer, ancestorX, ancestorY);
xPos += (fixedContainerX - ancestorX);
yPos += (fixedContainerY - ancestorY);
return;
}
}
RenderLayer* parentLayer;
if (position == AbsolutePosition || position == FixedPosition) {
// Do what enclosingPositionedAncestor() does, but check for ancestorLayer along the way.
parentLayer = parent();
bool foundAncestorFirst = false;
while (parentLayer) {
if (isPositionedContainer(parentLayer))
break;
if (parentLayer == ancestorLayer) {
foundAncestorFirst = true;
break;
}
parentLayer = parentLayer->parent();
}
if (foundAncestorFirst) {
// Found ancestorLayer before the abs. positioned container, so compute offset of both relative
// to enclosingPositionedAncestor and subtract.
RenderLayer* positionedAncestor = parentLayer->enclosingPositionedAncestor();
int thisX = 0;
int thisY = 0;
convertToLayerCoords(positionedAncestor, thisX, thisY);
int ancestorX = 0;
int ancestorY = 0;
ancestorLayer->convertToLayerCoords(positionedAncestor, ancestorX, ancestorY);
xPos += (thisX - ancestorX);
yPos += (thisY - ancestorY);
return;
}
} else
parentLayer = parent();
if (!parentLayer)
return;
parentLayer->convertToLayerCoords(ancestorLayer, xPos, yPos);
xPos += x();
yPos += y();
}
static inline int adjustedScrollDelta(int beginningDelta) {
// This implemention matches Firefox's.
// http://mxr.mozilla.org/firefox/source/toolkit/content/widgets/browser.xml#856.
const int speedReducer = 12;
int adjustedDelta = beginningDelta / speedReducer;
if (adjustedDelta > 1)
adjustedDelta = static_cast<int>(adjustedDelta * sqrt(static_cast<double>(adjustedDelta))) - 1;
else if (adjustedDelta < -1)
adjustedDelta = static_cast<int>(adjustedDelta * sqrt(static_cast<double>(-adjustedDelta))) + 1;
return adjustedDelta;
}
void RenderLayer::panScrollFromPoint(const IntPoint& sourcePoint)
{
Frame* frame = renderer()->frame();
if (!frame)
return;
IntPoint currentMousePosition = frame->eventHandler()->currentMousePosition();
// We need to check if the current mouse position is out of the window. When the mouse is out of the window, the position is incoherent
static IntPoint previousMousePosition;
if (currentMousePosition.x() < 0 || currentMousePosition.y() < 0)
currentMousePosition = previousMousePosition;
else
previousMousePosition = currentMousePosition;
int xDelta = currentMousePosition.x() - sourcePoint.x();
int yDelta = currentMousePosition.y() - sourcePoint.y();
if (abs(xDelta) <= ScrollView::noPanScrollRadius) // at the center we let the space for the icon
xDelta = 0;
if (abs(yDelta) <= ScrollView::noPanScrollRadius)
yDelta = 0;
scrollByRecursively(adjustedScrollDelta(xDelta), adjustedScrollDelta(yDelta));
}
void RenderLayer::scrollByRecursively(int xDelta, int yDelta)
{
if (!xDelta && !yDelta)
return;
bool restrictedByLineClamp = false;
if (renderer()->parent())
restrictedByLineClamp = !renderer()->parent()->style()->lineClamp().isNone();
if (renderer()->hasOverflowClip() && !restrictedByLineClamp) {
int newOffsetX = scrollXOffset() + xDelta;
int newOffsetY = scrollYOffset() + yDelta;
scrollToOffset(newOffsetX, newOffsetY);
// If this layer can't do the scroll we ask the next layer up that can scroll to try
int leftToScrollX = newOffsetX - scrollXOffset();
int leftToScrollY = newOffsetY - scrollYOffset();
if ((leftToScrollX || leftToScrollY) && renderer()->parent()) {
RenderObject* nextRenderer = renderer()->parent();
while (nextRenderer) {
if (nextRenderer->isBox() && toRenderBox(nextRenderer)->canBeScrolledAndHasScrollableArea()) {
nextRenderer->enclosingLayer()->scrollByRecursively(leftToScrollX, leftToScrollY);
break;
}
nextRenderer = nextRenderer->parent();
}
Frame* frame = renderer()->frame();
if (frame)
frame->eventHandler()->updateAutoscrollRenderer();
}
} else if (renderer()->view()->frameView()) {
// If we are here, we were called on a renderer that can be programmatically scrolled, but doesn't
// have an overflow clip. Which means that it is a document node that can be scrolled.
renderer()->view()->frameView()->scrollBy(IntSize(xDelta, yDelta));
// FIXME: If we didn't scroll the whole way, do we want to try looking at the frames ownerElement?
// https://bugs.webkit.org/show_bug.cgi?id=28237
}
}
void RenderLayer::scrollToOffset(int x, int y)
{
ScrollableArea::scrollToOffsetWithoutAnimation(IntPoint(x, y));
}
void RenderLayer::scrollTo(int x, int y)
{
RenderBox* box = renderBox();
if (!box)
return;
if (box->style()->overflowX() != OMARQUEE) {
if (x < 0)
x = 0;
if (y < 0)
y = 0;
// Call the scrollWidth/Height functions so that the dimensions will be computed if they need
// to be (for overflow:hidden blocks).
int maxX = scrollWidth() - box->clientWidth();
if (maxX < 0)
maxX = 0;
int maxY = scrollHeight() - box->clientHeight();
if (maxY < 0)
maxY = 0;
if (x > maxX)
x = maxX;
if (y > maxY)
y = maxY;
}
// FIXME: Eventually, we will want to perform a blit. For now never
// blit, since the check for blitting is going to be very
// complicated (since it will involve testing whether our layer
// is either occluded by another layer or clipped by an enclosing
// layer or contains fixed backgrounds, etc.).
int newScrollX = x - m_scrollOrigin.x();
int newScrollY = y - m_scrollOrigin.y();
if (m_scrollY == newScrollY && m_scrollX == newScrollX)
return;
m_scrollX = newScrollX;
m_scrollY = newScrollY;
// Update the positions of our child layers. Don't have updateLayerPositions() update
// compositing layers, because we need to do a deep update from the compositing ancestor.
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
child->updateLayerPositions(0);
RenderView* view = renderer()->view();
// We should have a RenderView if we're trying to scroll.
ASSERT(view);
if (view) {
#if ENABLE(DASHBOARD_SUPPORT)
// Update dashboard regions, scrolling may change the clip of a
// particular region.
view->frameView()->updateDashboardRegions();
#endif
view->updateWidgetPositions();
}
#if USE(ACCELERATED_COMPOSITING)
if (compositor()->inCompositingMode()) {
// Our stacking context is guaranteed to contain all of our descendants that may need
// repositioning, so update compositing layers from there.
if (RenderLayer* compositingAncestor = stackingContext()->enclosingCompositingLayer()) {
if (compositor()->compositingConsultsOverlap())
compositor()->updateCompositingLayers(CompositingUpdateOnScroll, compositingAncestor);
else {
bool isUpdateRoot = true;
compositingAncestor->backing()->updateAfterLayout(RenderLayerBacking::AllDescendants, isUpdateRoot);
}
}
}
#endif
RenderBoxModelObject* repaintContainer = renderer()->containerForRepaint();
IntRect rectForRepaint = renderer()->clippedOverflowRectForRepaint(repaintContainer);
Frame* frame = renderer()->frame();
if (frame) {
// The caret rect needs to be invalidated after scrolling
frame->selection()->setCaretRectNeedsUpdate();
FloatQuad quadForFakeMouseMoveEvent = FloatQuad(rectForRepaint);
if (repaintContainer)
quadForFakeMouseMoveEvent = repaintContainer->localToAbsoluteQuad(quadForFakeMouseMoveEvent);
frame->eventHandler()->dispatchFakeMouseMoveEventSoonInQuad(quadForFakeMouseMoveEvent);
}
// Just schedule a full repaint of our object.
if (view)
renderer()->repaintUsingContainer(repaintContainer, rectForRepaint);
// Schedule the scroll DOM event.
renderer()->node()->document()->eventQueue()->enqueueOrDispatchScrollEvent(renderer()->node(), EventQueue::ScrollEventElementTarget);
}
void RenderLayer::scrollRectToVisible(const IntRect& rect, bool scrollToAnchor, const ScrollAlignment& alignX, const ScrollAlignment& alignY)
{
RenderLayer* parentLayer = 0;
IntRect newRect = rect;
int xOffset = 0, yOffset = 0;
// We may end up propagating a scroll event. It is important that we suspend events until
// the end of the function since they could delete the layer or the layer's renderer().
FrameView* frameView = renderer()->document()->view();
if (frameView)
frameView->pauseScheduledEvents();
bool restrictedByLineClamp = false;
if (renderer()->parent()) {
parentLayer = renderer()->parent()->enclosingLayer();
restrictedByLineClamp = !renderer()->parent()->style()->lineClamp().isNone();
}
if (renderer()->hasOverflowClip() && !restrictedByLineClamp) {
// Don't scroll to reveal an overflow layer that is restricted by the -webkit-line-clamp property.
// This will prevent us from revealing text hidden by the slider in Safari RSS.
RenderBox* box = renderBox();
ASSERT(box);
FloatPoint absPos = box->localToAbsolute();
absPos.move(box->borderLeft(), box->borderTop());
IntRect layerBounds = IntRect(absPos.x() + scrollXOffset(), absPos.y() + scrollYOffset(), box->clientWidth(), box->clientHeight());
IntRect exposeRect = IntRect(rect.x() + scrollXOffset(), rect.y() + scrollYOffset(), rect.width(), rect.height());
IntRect r = getRectToExpose(layerBounds, exposeRect, alignX, alignY);
xOffset = r.x() - absPos.x();
yOffset = r.y() - absPos.y();
// Adjust offsets if they're outside of the allowable range.
xOffset = max(0, min(scrollWidth() - layerBounds.width(), xOffset));
yOffset = max(0, min(scrollHeight() - layerBounds.height(), yOffset));
if (xOffset != scrollXOffset() || yOffset != scrollYOffset()) {
int diffX = scrollXOffset();
int diffY = scrollYOffset();
scrollToOffset(xOffset, yOffset);
diffX = scrollXOffset() - diffX;
diffY = scrollYOffset() - diffY;
newRect.setX(rect.x() - diffX);
newRect.setY(rect.y() - diffY);
}
} else if (!parentLayer && renderer()->isBox() && renderBox()->canBeProgramaticallyScrolled(scrollToAnchor)) {
if (frameView) {
if (renderer()->document() && renderer()->document()->ownerElement() && renderer()->document()->ownerElement()->renderer()) {
IntRect viewRect = frameView->visibleContentRect();
IntRect r = getRectToExpose(viewRect, rect, alignX, alignY);
xOffset = r.x();
yOffset = r.y();
// Adjust offsets if they're outside of the allowable range.
xOffset = max(0, min(frameView->contentsWidth(), xOffset));
yOffset = max(0, min(frameView->contentsHeight(), yOffset));
frameView->setScrollPosition(IntPoint(xOffset, yOffset));
parentLayer = renderer()->document()->ownerElement()->renderer()->enclosingLayer();
newRect.setX(rect.x() - frameView->scrollX() + frameView->x());
newRect.setY(rect.y() - frameView->scrollY() + frameView->y());
} else {
IntRect viewRect = frameView->visibleContentRect();
IntRect r = getRectToExpose(viewRect, rect, alignX, alignY);
frameView->setScrollPosition(r.location());
// This is the outermost view of a web page, so after scrolling this view we
// scroll its container by calling Page::scrollRectIntoView.
// This only has an effect on the Mac platform in applications
// that put web views into scrolling containers, such as Mac OS X Mail.
// The canAutoscroll function in EventHandler also knows about this.
if (Frame* frame = frameView->frame()) {
if (Page* page = frame->page())
page->chrome()->scrollRectIntoView(rect);
}
}
}
}
if (parentLayer)
parentLayer->scrollRectToVisible(newRect, scrollToAnchor, alignX, alignY);
if (frameView)
frameView->resumeScheduledEvents();
}
IntRect RenderLayer::getRectToExpose(const IntRect &visibleRect, const IntRect &exposeRect, const ScrollAlignment& alignX, const ScrollAlignment& alignY)
{
// Determine the appropriate X behavior.
ScrollBehavior scrollX;
IntRect exposeRectX(exposeRect.x(), visibleRect.y(), exposeRect.width(), visibleRect.height());
int intersectWidth = intersection(visibleRect, exposeRectX).width();
if (intersectWidth == exposeRect.width() || intersectWidth >= MIN_INTERSECT_FOR_REVEAL)
// If the rectangle is fully visible, use the specified visible behavior.
// If the rectangle is partially visible, but over a certain threshold,
// then treat it as fully visible to avoid unnecessary horizontal scrolling
scrollX = ScrollAlignment::getVisibleBehavior(alignX);
else if (intersectWidth == visibleRect.width()) {
// If the rect is bigger than the visible area, don't bother trying to center. Other alignments will work.
scrollX = ScrollAlignment::getVisibleBehavior(alignX);
if (scrollX == alignCenter)
scrollX = noScroll;
} else if (intersectWidth > 0)
// If the rectangle is partially visible, but not above the minimum threshold, use the specified partial behavior
scrollX = ScrollAlignment::getPartialBehavior(alignX);
else
scrollX = ScrollAlignment::getHiddenBehavior(alignX);
// If we're trying to align to the closest edge, and the exposeRect is further right
// than the visibleRect, and not bigger than the visible area, then align with the right.
if (scrollX == alignToClosestEdge && exposeRect.maxX() > visibleRect.maxX() && exposeRect.width() < visibleRect.width())
scrollX = alignRight;
// Given the X behavior, compute the X coordinate.
int x;
if (scrollX == noScroll)
x = visibleRect.x();
else if (scrollX == alignRight)
x = exposeRect.maxX() - visibleRect.width();
else if (scrollX == alignCenter)
x = exposeRect.x() + (exposeRect.width() - visibleRect.width()) / 2;
else
x = exposeRect.x();
// Determine the appropriate Y behavior.
ScrollBehavior scrollY;
IntRect exposeRectY(visibleRect.x(), exposeRect.y(), visibleRect.width(), exposeRect.height());
int intersectHeight = intersection(visibleRect, exposeRectY).height();
if (intersectHeight == exposeRect.height())
// If the rectangle is fully visible, use the specified visible behavior.
scrollY = ScrollAlignment::getVisibleBehavior(alignY);
else if (intersectHeight == visibleRect.height()) {
// If the rect is bigger than the visible area, don't bother trying to center. Other alignments will work.
scrollY = ScrollAlignment::getVisibleBehavior(alignY);
if (scrollY == alignCenter)
scrollY = noScroll;
} else if (intersectHeight > 0)
// If the rectangle is partially visible, use the specified partial behavior
scrollY = ScrollAlignment::getPartialBehavior(alignY);
else
scrollY = ScrollAlignment::getHiddenBehavior(alignY);
// If we're trying to align to the closest edge, and the exposeRect is further down
// than the visibleRect, and not bigger than the visible area, then align with the bottom.
if (scrollY == alignToClosestEdge && exposeRect.maxY() > visibleRect.maxY() && exposeRect.height() < visibleRect.height())
scrollY = alignBottom;
// Given the Y behavior, compute the Y coordinate.
int y;
if (scrollY == noScroll)
y = visibleRect.y();
else if (scrollY == alignBottom)
y = exposeRect.maxY() - visibleRect.height();
else if (scrollY == alignCenter)
y = exposeRect.y() + (exposeRect.height() - visibleRect.height()) / 2;
else
y = exposeRect.y();
return IntRect(IntPoint(x, y), visibleRect.size());
}
void RenderLayer::autoscroll()
{
Frame* frame = renderer()->frame();
if (!frame)
return;
FrameView* frameView = frame->view();
if (!frameView)
return;
#if ENABLE(DRAG_SUPPORT)
frame->eventHandler()->updateSelectionForMouseDrag();
#endif
IntPoint currentDocumentPosition = frameView->windowToContents(frame->eventHandler()->currentMousePosition());
scrollRectToVisible(IntRect(currentDocumentPosition, IntSize(1, 1)), false, ScrollAlignment::alignToEdgeIfNeeded, ScrollAlignment::alignToEdgeIfNeeded);
}
void RenderLayer::resize(const PlatformMouseEvent& evt, const IntSize& oldOffset)
{
// FIXME: This should be possible on generated content but is not right now.
if (!inResizeMode() || !renderer()->hasOverflowClip() || !renderer()->node())
return;
// Set the width and height of the shadow ancestor node if there is one.
// This is necessary for textarea elements since the resizable layer is in the shadow content.
Element* element = static_cast<Element*>(renderer()->node()->shadowAncestorNode());
RenderBox* renderer = toRenderBox(element->renderer());
EResize resize = renderer->style()->resize();
if (resize == RESIZE_NONE)
return;
Document* document = element->document();
if (!document->frame()->eventHandler()->mousePressed())
return;
float zoomFactor = renderer->style()->effectiveZoom();
IntSize newOffset = offsetFromResizeCorner(document->view()->windowToContents(evt.pos()));
newOffset.setWidth(newOffset.width() / zoomFactor);
newOffset.setHeight(newOffset.height() / zoomFactor);
IntSize currentSize = IntSize(renderer->width() / zoomFactor, renderer->height() / zoomFactor);
IntSize minimumSize = element->minimumSizeForResizing().shrunkTo(currentSize);
element->setMinimumSizeForResizing(minimumSize);
IntSize adjustedOldOffset = IntSize(oldOffset.width() / zoomFactor, oldOffset.height() / zoomFactor);
IntSize difference = (currentSize + newOffset - adjustedOldOffset).expandedTo(minimumSize) - currentSize;
CSSStyleDeclaration* style = element->style();
bool isBoxSizingBorder = renderer->style()->boxSizing() == BORDER_BOX;
ExceptionCode ec;
if (resize != RESIZE_VERTICAL && difference.width()) {
if (element->isFormControlElement()) {
// Make implicit margins from the theme explicit (see <http://bugs.webkit.org/show_bug.cgi?id=9547>).
style->setProperty(CSSPropertyMarginLeft, String::number(renderer->marginLeft() / zoomFactor) + "px", false, ec);
style->setProperty(CSSPropertyMarginRight, String::number(renderer->marginRight() / zoomFactor) + "px", false, ec);
}
int baseWidth = renderer->width() - (isBoxSizingBorder ? 0 : renderer->borderAndPaddingWidth());
baseWidth = baseWidth / zoomFactor;
style->setProperty(CSSPropertyWidth, String::number(baseWidth + difference.width()) + "px", false, ec);
}
if (resize != RESIZE_HORIZONTAL && difference.height()) {
if (element->isFormControlElement()) {
// Make implicit margins from the theme explicit (see <http://bugs.webkit.org/show_bug.cgi?id=9547>).
style->setProperty(CSSPropertyMarginTop, String::number(renderer->marginTop() / zoomFactor) + "px", false, ec);
style->setProperty(CSSPropertyMarginBottom, String::number(renderer->marginBottom() / zoomFactor) + "px", false, ec);
}
int baseHeight = renderer->height() - (isBoxSizingBorder ? 0 : renderer->borderAndPaddingHeight());
baseHeight = baseHeight / zoomFactor;
style->setProperty(CSSPropertyHeight, String::number(baseHeight + difference.height()) + "px", false, ec);
}
document->updateLayout();
// FIXME (Radar 4118564): We should also autoscroll the window as necessary to keep the point under the cursor in view.
}
int RenderLayer::scrollSize(ScrollbarOrientation orientation) const
{
Scrollbar* scrollbar = ((orientation == HorizontalScrollbar) ? m_hBar : m_vBar).get();
return scrollbar ? (scrollbar->totalSize() - scrollbar->visibleSize()) : 0;
}
void RenderLayer::setScrollOffset(const IntPoint& offset)
{
scrollTo(offset.x(), offset.y());
}
int RenderLayer::scrollPosition(Scrollbar* scrollbar) const
{
if (scrollbar->orientation() == HorizontalScrollbar)
return scrollXOffset();
if (scrollbar->orientation() == VerticalScrollbar)
return scrollYOffset();
return 0;
}
bool RenderLayer::isActive() const
{
Page* page = renderer()->frame()->page();
return page && page->focusController()->isActive();
}
static IntRect cornerRect(const RenderLayer* layer, const IntRect& bounds)
{
int horizontalThickness;
int verticalThickness;
if (!layer->verticalScrollbar() && !layer->horizontalScrollbar()) {
// FIXME: This isn't right. We need to know the thickness of custom scrollbars
// even when they don't exist in order to set the resizer square size properly.
horizontalThickness = ScrollbarTheme::nativeTheme()->scrollbarThickness();
verticalThickness = horizontalThickness;
} else if (layer->verticalScrollbar() && !layer->horizontalScrollbar()) {
horizontalThickness = layer->verticalScrollbar()->width();
verticalThickness = horizontalThickness;
} else if (layer->horizontalScrollbar() && !layer->verticalScrollbar()) {
verticalThickness = layer->horizontalScrollbar()->height();
horizontalThickness = verticalThickness;
} else {
horizontalThickness = layer->verticalScrollbar()->width();
verticalThickness = layer->horizontalScrollbar()->height();
}
return IntRect(bounds.maxX() - horizontalThickness - layer->renderer()->style()->borderRightWidth(),
bounds.maxY() - verticalThickness - layer->renderer()->style()->borderBottomWidth(),
horizontalThickness, verticalThickness);
}
IntRect RenderLayer::scrollCornerRect() const
{
// We have a scrollbar corner when a scrollbar is visible and not filling the entire length of the box.
// This happens when:
// (a) A resizer is present and at least one scrollbar is present
// (b) Both scrollbars are present.
bool hasHorizontalBar = horizontalScrollbar();
bool hasVerticalBar = verticalScrollbar();
bool hasResizer = renderer()->style()->resize() != RESIZE_NONE;
if ((hasHorizontalBar && hasVerticalBar) || (hasResizer && (hasHorizontalBar || hasVerticalBar)))
return cornerRect(this, renderBox()->borderBoxRect());
return IntRect();
}
static IntRect resizerCornerRect(const RenderLayer* layer, const IntRect& bounds)
{
ASSERT(layer->renderer()->isBox());
if (layer->renderer()->style()->resize() == RESIZE_NONE)
return IntRect();
return cornerRect(layer, bounds);
}
IntRect RenderLayer::scrollCornerAndResizerRect() const
{
RenderBox* box = renderBox();
if (!box)
return IntRect();
IntRect scrollCornerAndResizer = scrollCornerRect();
if (scrollCornerAndResizer.isEmpty())
scrollCornerAndResizer = resizerCornerRect(this, box->borderBoxRect());
return scrollCornerAndResizer;
}
bool RenderLayer::isScrollCornerVisible() const
{
ASSERT(renderer()->isBox());
return !scrollCornerRect().isEmpty();
}
IntRect RenderLayer::convertFromScrollbarToContainingView(const Scrollbar* scrollbar, const IntRect& scrollbarRect) const
{
RenderView* view = renderer()->view();
if (!view)
return scrollbarRect;
IntRect rect = scrollbarRect;
rect.move(scrollbarOffset(scrollbar));
return view->frameView()->convertFromRenderer(renderer(), rect);
}
IntRect RenderLayer::convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntRect& parentRect) const
{
RenderView* view = renderer()->view();
if (!view)
return parentRect;
IntRect rect = view->frameView()->convertToRenderer(renderer(), parentRect);
rect.move(-scrollbarOffset(scrollbar));
return rect;
}
IntPoint RenderLayer::convertFromScrollbarToContainingView(const Scrollbar* scrollbar, const IntPoint& scrollbarPoint) const
{
RenderView* view = renderer()->view();
if (!view)
return scrollbarPoint;
IntPoint point = scrollbarPoint;
point.move(scrollbarOffset(scrollbar));
return view->frameView()->convertFromRenderer(renderer(), point);
}
IntPoint RenderLayer::convertFromContainingViewToScrollbar(const Scrollbar* scrollbar, const IntPoint& parentPoint) const
{
RenderView* view = renderer()->view();
if (!view)
return parentPoint;
IntPoint point = view->frameView()->convertToRenderer(renderer(), parentPoint);
point.move(-scrollbarOffset(scrollbar));
return point;
}
IntSize RenderLayer::contentsSize() const
{
return IntSize(const_cast<RenderLayer*>(this)->scrollWidth(), const_cast<RenderLayer*>(this)->scrollHeight());
}
int RenderLayer::visibleHeight() const
{
return m_height;
}
int RenderLayer::visibleWidth() const
{
return m_width;
}
bool RenderLayer::shouldSuspendScrollAnimations() const
{
RenderView* view = renderer()->view();
if (!view)
return true;
return view->frameView()->shouldSuspendScrollAnimations();
}
IntPoint RenderLayer::currentMousePosition() const
{
return renderer()->frame() ? renderer()->frame()->eventHandler()->currentMousePosition() : IntPoint();
}
IntSize RenderLayer::scrollbarOffset(const Scrollbar* scrollbar) const
{
RenderBox* box = renderBox();
if (scrollbar == m_vBar.get())
return IntSize(box->width() - box->borderRight() - scrollbar->width(), box->borderTop());
if (scrollbar == m_hBar.get())
return IntSize(box->borderLeft(), box->height() - box->borderBottom() - scrollbar->height());
ASSERT_NOT_REACHED();
return IntSize();
}
void RenderLayer::invalidateScrollbarRect(Scrollbar* scrollbar, const IntRect& rect)
{
#if USE(ACCELERATED_COMPOSITING)
if (scrollbar == m_vBar.get()) {
if (GraphicsLayer* layer = layerForVerticalScrollbar()) {
layer->setNeedsDisplayInRect(rect);
return;
}
} else {
if (GraphicsLayer* layer = layerForHorizontalScrollbar()) {
layer->setNeedsDisplayInRect(rect);
return;
}
}
#endif
IntRect scrollRect = rect;
RenderBox* box = renderBox();
ASSERT(box);
if (scrollbar == m_vBar.get())
scrollRect.move(box->width() - box->borderRight() - scrollbar->width(), box->borderTop());
else
scrollRect.move(box->borderLeft(), box->height() - box->borderBottom() - scrollbar->height());
renderer()->repaintRectangle(scrollRect);
}
void RenderLayer::invalidateScrollCornerRect(const IntRect& rect)
{
#if USE(ACCELERATED_COMPOSITING)
if (GraphicsLayer* layer = layerForScrollCorner()) {
layer->setNeedsDisplayInRect(rect);
return;
}
#endif
if (m_scrollCorner)
m_scrollCorner->repaintRectangle(rect);
if (m_resizer)
m_resizer->repaintRectangle(rect);
}
PassRefPtr<Scrollbar> RenderLayer::createScrollbar(ScrollbarOrientation orientation)
{
RefPtr<Scrollbar> widget;
RenderObject* actualRenderer = renderer()->node() ? renderer()->node()->shadowAncestorNode()->renderer() : renderer();
bool hasCustomScrollbarStyle = actualRenderer->isBox() && actualRenderer->style()->hasPseudoStyle(SCROLLBAR);
if (hasCustomScrollbarStyle)
widget = RenderScrollbar::createCustomScrollbar(this, orientation, toRenderBox(actualRenderer));
else {
widget = Scrollbar::createNativeScrollbar(this, orientation, RegularScrollbar);
if (orientation == HorizontalScrollbar)
didAddHorizontalScrollbar(widget.get());
else
didAddVerticalScrollbar(widget.get());
}
renderer()->document()->view()->addChild(widget.get());
return widget.release();
}
void RenderLayer::destroyScrollbar(ScrollbarOrientation orientation)
{
RefPtr<Scrollbar>& scrollbar = orientation == HorizontalScrollbar ? m_hBar : m_vBar;
if (scrollbar) {
if (scrollbar->isCustomScrollbar())
static_cast<RenderScrollbar*>(scrollbar.get())->clearOwningRenderer();
else {
if (orientation == HorizontalScrollbar)
willRemoveHorizontalScrollbar(scrollbar.get());
else
willRemoveVerticalScrollbar(scrollbar.get());
}
scrollbar->removeFromParent();
scrollbar->disconnectFromScrollableArea();
scrollbar = 0;
}
}
void RenderLayer::setHasHorizontalScrollbar(bool hasScrollbar)
{
if (hasScrollbar == (m_hBar != 0))
return;
if (hasScrollbar)
m_hBar = createScrollbar(HorizontalScrollbar);
else
destroyScrollbar(HorizontalScrollbar);
// Destroying or creating one bar can cause our scrollbar corner to come and go. We need to update the opposite scrollbar's style.
if (m_hBar)
m_hBar->styleChanged();
if (m_vBar)
m_vBar->styleChanged();
#if ENABLE(DASHBOARD_SUPPORT)
// Force an update since we know the scrollbars have changed things.
if (renderer()->document()->hasDashboardRegions())
renderer()->document()->setDashboardRegionsDirty(true);
#endif
}
void RenderLayer::setHasVerticalScrollbar(bool hasScrollbar)
{
if (hasScrollbar == (m_vBar != 0))
return;
if (hasScrollbar)
m_vBar = createScrollbar(VerticalScrollbar);
else
destroyScrollbar(VerticalScrollbar);
// Destroying or creating one bar can cause our scrollbar corner to come and go. We need to update the opposite scrollbar's style.
if (m_hBar)
m_hBar->styleChanged();
if (m_vBar)
m_vBar->styleChanged();
#if ENABLE(DASHBOARD_SUPPORT)
// Force an update since we know the scrollbars have changed things.
if (renderer()->document()->hasDashboardRegions())
renderer()->document()->setDashboardRegionsDirty(true);
#endif
}
int RenderLayer::verticalScrollbarWidth(OverlayScrollbarSizeRelevancy relevancy) const
{
if (!m_vBar || (m_vBar->isOverlayScrollbar() && relevancy == IgnoreOverlayScrollbarSize))
return 0;
return m_vBar->width();
}
int RenderLayer::horizontalScrollbarHeight(OverlayScrollbarSizeRelevancy relevancy) const
{
if (!m_hBar || (m_hBar->isOverlayScrollbar() && relevancy == IgnoreOverlayScrollbarSize))
return 0;
return m_hBar->height();
}
IntSize RenderLayer::offsetFromResizeCorner(const IntPoint& absolutePoint) const
{
// Currently the resize corner is always the bottom right corner
IntPoint bottomRight(width(), height());
IntPoint localPoint = absoluteToContents(absolutePoint);
return localPoint - bottomRight;
}
bool RenderLayer::hasOverflowControls() const
{
return m_hBar || m_vBar || m_scrollCorner || renderer()->style()->resize() != RESIZE_NONE;
}
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
bool RenderLayer::hasOverflowParent() const
{
const RenderLayer* layer = this;
while (layer && !layer->hasOverflowScroll())
layer = layer->parent();
return layer;
}
#endif
void RenderLayer::positionOverflowControls(int tx, int ty)
{
if (!m_hBar && !m_vBar && (!renderer()->hasOverflowClip() || renderer()->style()->resize() == RESIZE_NONE))
return;
RenderBox* box = renderBox();
if (!box)
return;
const IntRect& borderBox = box->borderBoxRect();
const IntRect& scrollCorner = scrollCornerRect();
IntRect absBounds(borderBox.x() + tx, borderBox.y() + ty, borderBox.width(), borderBox.height());
if (m_vBar)
m_vBar->setFrameRect(IntRect(absBounds.maxX() - box->borderRight() - m_vBar->width(),
absBounds.y() + box->borderTop(),
m_vBar->width(),
absBounds.height() - (box->borderTop() + box->borderBottom()) - scrollCorner.height()));
if (m_hBar)
m_hBar->setFrameRect(IntRect(absBounds.x() + box->borderLeft(),
absBounds.maxY() - box->borderBottom() - m_hBar->height(),
absBounds.width() - (box->borderLeft() + box->borderRight()) - scrollCorner.width(),
m_hBar->height()));
#if USE(ACCELERATED_COMPOSITING)
if (GraphicsLayer* layer = layerForHorizontalScrollbar()) {
if (m_hBar) {
layer->setPosition(IntPoint(m_hBar->frameRect().x() - tx, m_hBar->frameRect().y() - ty));
layer->setSize(m_hBar->frameRect().size());
}
layer->setDrawsContent(m_hBar);
}
if (GraphicsLayer* layer = layerForVerticalScrollbar()) {
if (m_vBar) {
layer->setPosition(IntPoint(m_vBar->frameRect().x() - tx, m_vBar->frameRect().y() - ty));
layer->setSize(m_vBar->frameRect().size());
}
layer->setDrawsContent(m_vBar);
}
if (GraphicsLayer* layer = layerForScrollCorner()) {
const IntRect& scrollCornerAndResizer = scrollCornerAndResizerRect();
layer->setPosition(scrollCornerAndResizer.location());
layer->setSize(scrollCornerAndResizer.size());
layer->setDrawsContent(!scrollCornerAndResizer.isEmpty());
}
#endif
if (m_scrollCorner)
m_scrollCorner->setFrameRect(scrollCorner);
if (m_resizer)
m_resizer->setFrameRect(resizerCornerRect(this, borderBox));
}
#if PLATFORM(ANDROID)
// When width/height change, the scrollWidth/scrollHeight should be dirty.
// And this should be upstreamed to webkit.
void RenderLayer::setWidth(int w)
{
if (m_width != w) {
m_scrollDimensionsDirty = true;
m_width = w;
}
}
void RenderLayer::setHeight(int h)
{
if (m_height != h) {
m_scrollDimensionsDirty = true;
m_height = h;
}
}
#endif
int RenderLayer::scrollWidth()
{
if (m_scrollDimensionsDirty)
computeScrollDimensions();
return m_scrollWidth;
}
int RenderLayer::scrollHeight()
{
if (m_scrollDimensionsDirty)
computeScrollDimensions();
return m_scrollHeight;
}
int RenderLayer::overflowTop() const
{
RenderBox* box = renderBox();
IntRect overflowRect(box->layoutOverflowRect());
box->flipForWritingMode(overflowRect);
return overflowRect.y();
}
int RenderLayer::overflowBottom() const
{
RenderBox* box = renderBox();
IntRect overflowRect(box->layoutOverflowRect());
box->flipForWritingMode(overflowRect);
return overflowRect.maxY();
}
int RenderLayer::overflowLeft() const
{
RenderBox* box = renderBox();
IntRect overflowRect(box->layoutOverflowRect());
box->flipForWritingMode(overflowRect);
return overflowRect.x();
}
int RenderLayer::overflowRight() const
{
RenderBox* box = renderBox();
IntRect overflowRect(box->layoutOverflowRect());
box->flipForWritingMode(overflowRect);
return overflowRect.maxX();
}
void RenderLayer::computeScrollDimensions(bool* needHBar, bool* needVBar)
{
RenderBox* box = renderBox();
ASSERT(box);
m_scrollDimensionsDirty = false;
m_scrollLeftOverflow = overflowLeft() - box->borderLeft();
m_scrollTopOverflow = overflowTop() - box->borderTop();
m_scrollWidth = overflowRight() - overflowLeft();
m_scrollHeight = overflowBottom() - overflowTop();
m_scrollOrigin = IntPoint(-m_scrollLeftOverflow, -m_scrollTopOverflow);
if (needHBar)
*needHBar = m_scrollWidth > box->clientWidth();
if (needVBar)
*needVBar = m_scrollHeight > box->clientHeight();
}
void RenderLayer::updateOverflowStatus(bool horizontalOverflow, bool verticalOverflow)
{
if (m_overflowStatusDirty) {
m_horizontalOverflow = horizontalOverflow;
m_verticalOverflow = verticalOverflow;
m_overflowStatusDirty = false;
return;
}
bool horizontalOverflowChanged = (m_horizontalOverflow != horizontalOverflow);
bool verticalOverflowChanged = (m_verticalOverflow != verticalOverflow);
if (horizontalOverflowChanged || verticalOverflowChanged) {
m_horizontalOverflow = horizontalOverflow;
m_verticalOverflow = verticalOverflow;
if (FrameView* frameView = renderer()->document()->view()) {
frameView->scheduleEvent(OverflowEvent::create(horizontalOverflowChanged, horizontalOverflow, verticalOverflowChanged, verticalOverflow),
renderer()->node());
}
}
}
void RenderLayer::updateScrollInfoAfterLayout()
{
RenderBox* box = renderBox();
if (!box)
return;
m_scrollDimensionsDirty = true;
bool horizontalOverflow, verticalOverflow;
computeScrollDimensions(&horizontalOverflow, &verticalOverflow);
if (box->style()->overflowX() != OMARQUEE) {
// Layout may cause us to be in an invalid scroll position. In this case we need
// to pull our scroll offsets back to the max (or push them up to the min).
int newX = max(0, min(scrollXOffset(), scrollWidth() - box->clientWidth()));
int newY = max(0, min(scrollYOffset(), scrollHeight() - box->clientHeight()));
if (newX != scrollXOffset() || newY != scrollYOffset()) {
RenderView* view = renderer()->view();
ASSERT(view);
// scrollToOffset() may call updateLayerPositions(), which doesn't work
// with LayoutState.
// FIXME: Remove the disableLayoutState/enableLayoutState if the above changes.
if (view)
view->disableLayoutState();
scrollToOffset(newX, newY);
if (view)
view->enableLayoutState();
}
}
bool haveHorizontalBar = m_hBar;
bool haveVerticalBar = m_vBar;
// overflow:scroll should just enable/disable.
if (renderer()->style()->overflowX() == OSCROLL)
m_hBar->setEnabled(horizontalOverflow);
if (renderer()->style()->overflowY() == OSCROLL)
m_vBar->setEnabled(verticalOverflow);
// A dynamic change from a scrolling overflow to overflow:hidden means we need to get rid of any
// scrollbars that may be present.
if (renderer()->style()->overflowX() == OHIDDEN && haveHorizontalBar)
setHasHorizontalScrollbar(false);
if (renderer()->style()->overflowY() == OHIDDEN && haveVerticalBar)
setHasVerticalScrollbar(false);
// overflow:auto may need to lay out again if scrollbars got added/removed.
bool scrollbarsChanged = (box->hasAutoHorizontalScrollbar() && haveHorizontalBar != horizontalOverflow) ||
(box->hasAutoVerticalScrollbar() && haveVerticalBar != verticalOverflow);
if (scrollbarsChanged) {
if (box->hasAutoHorizontalScrollbar())
setHasHorizontalScrollbar(horizontalOverflow);
if (box->hasAutoVerticalScrollbar())
setHasVerticalScrollbar(verticalOverflow);
#if ENABLE(DASHBOARD_SUPPORT)
// Force an update since we know the scrollbars have changed things.
if (renderer()->document()->hasDashboardRegions())
renderer()->document()->setDashboardRegionsDirty(true);
#endif
renderer()->repaint();
if (renderer()->style()->overflowX() == OAUTO || renderer()->style()->overflowY() == OAUTO) {
if (!m_inOverflowRelayout) {
// Our proprietary overflow: overlay value doesn't trigger a layout.
m_inOverflowRelayout = true;
renderer()->setNeedsLayout(true, false);
if (renderer()->isRenderBlock()) {
RenderBlock* block = toRenderBlock(renderer());
block->scrollbarsChanged(box->hasAutoHorizontalScrollbar() && haveHorizontalBar != horizontalOverflow,
box->hasAutoVerticalScrollbar() && haveVerticalBar != verticalOverflow);
block->layoutBlock(true);
} else
renderer()->layout();
m_inOverflowRelayout = false;
}
}
}
// If overflow:scroll is turned into overflow:auto a bar might still be disabled (Bug 11985).
if (m_hBar && box->hasAutoHorizontalScrollbar())
m_hBar->setEnabled(true);
if (m_vBar && box->hasAutoVerticalScrollbar())
m_vBar->setEnabled(true);
// Set up the range (and page step/line step).
if (m_hBar) {
int clientWidth = box->clientWidth();
int pageStep = max(max<int>(clientWidth * Scrollbar::minFractionToStepWhenPaging(), clientWidth - Scrollbar::maxOverlapBetweenPages()), 1);
m_hBar->setSteps(Scrollbar::pixelsPerLineStep(), pageStep);
m_hBar->setProportion(clientWidth, m_scrollWidth);
}
if (m_vBar) {
int clientHeight = box->clientHeight();
int pageStep = max(max<int>(clientHeight * Scrollbar::minFractionToStepWhenPaging(), clientHeight - Scrollbar::maxOverlapBetweenPages()), 1);
m_vBar->setSteps(Scrollbar::pixelsPerLineStep(), pageStep);
m_vBar->setProportion(clientHeight, m_scrollHeight);
}
RenderView* view = renderer()->view();
view->disableLayoutState();
scrollToOffset(scrollXOffset(), scrollYOffset());
view->enableLayoutState();
if (renderer()->node() && renderer()->document()->hasListenerType(Document::OVERFLOWCHANGED_LISTENER))
updateOverflowStatus(horizontalOverflow, verticalOverflow);
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
bool hasOverflowScroll = ((horizontalOverflow && m_hBar) || (verticalOverflow && m_vBar));
if (hasOverflowScroll) {
// Disable UI side scrolling for non-readonly textareas.
if (renderer()->isTextArea() && (!renderer()->node()
|| !static_cast<HTMLTextAreaElement*>(renderer()->node())->readOnly()))
hasOverflowScroll = false;
}
if (hasOverflowScroll != m_hasOverflowScroll) {
m_hasOverflowScroll = hasOverflowScroll;
dirtyZOrderLists();
dirtyStackingContextZOrderLists();
if (renderer()->node())
renderer()->node()->setNeedsStyleRecalc(SyntheticStyleChange);
}
#endif
}
void RenderLayer::paintOverflowControls(GraphicsContext* context, int tx, int ty, const IntRect& damageRect, bool paintingOverlayControls)
{
// Don't do anything if we have no overflow.
if (!renderer()->hasOverflowClip())
return;
// Overlay scrollbars paint in a second pass through the layer tree so that they will paint
// on top of everything else. If this is the normal painting pass, paintingOverlayControls
// will be false, and we should just tell the root layer that there are overlay scrollbars
// that need to be painted. That will cause the second pass through the layer tree to run,
// and we'll paint the scrollbars then. In the meantime, cache tx and ty so that the
// second pass doesn't need to re-enter the RenderTree to get it right.
if (hasOverlayScrollbars() && !paintingOverlayControls) {
RenderView* renderView = renderer()->view();
renderView->layer()->setContainsDirtyOverlayScrollbars(true);
m_cachedOverlayScrollbarOffset = IntPoint(tx, ty);
renderView->frameView()->setContainsScrollableAreaWithOverlayScrollbars(true);
return;
}
int offsetX = tx;
int offsetY = ty;
if (paintingOverlayControls) {
offsetX = m_cachedOverlayScrollbarOffset.x();
offsetY = m_cachedOverlayScrollbarOffset.y();
}
// Move the scrollbar widgets if necessary. We normally move and resize widgets during layout, but sometimes
// widgets can move without layout occurring (most notably when you scroll a document that
// contains fixed positioned elements).
positionOverflowControls(offsetX, offsetY);
// Now that we're sure the scrollbars are in the right place, paint them.
if (m_hBar
#if USE(ACCELERATED_COMPOSITING)
&& !layerForHorizontalScrollbar()
#endif
)
m_hBar->paint(context, damageRect);
if (m_vBar
#if USE(ACCELERATED_COMPOSITING)
&& !layerForVerticalScrollbar()
#endif
)
m_vBar->paint(context, damageRect);
#if USE(ACCELERATED_COMPOSITING)
if (layerForScrollCorner())
return;
#endif
// We fill our scroll corner with white if we have a scrollbar that doesn't run all the way up to the
// edge of the box.
paintScrollCorner(context, offsetX, offsetY, damageRect);
// Paint our resizer last, since it sits on top of the scroll corner.
paintResizer(context, offsetX, offsetY, damageRect);
}
void RenderLayer::paintScrollCorner(GraphicsContext* context, int tx, int ty, const IntRect& damageRect)
{
RenderBox* box = renderBox();
ASSERT(box);
IntRect cornerRect = scrollCornerRect();
IntRect absRect = IntRect(cornerRect.x() + tx, cornerRect.y() + ty, cornerRect.width(), cornerRect.height());
if (!absRect.intersects(damageRect))
return;
if (context->updatingControlTints()) {
updateScrollCornerStyle();
return;
}
if (m_scrollCorner) {
m_scrollCorner->paintIntoRect(context, tx, ty, absRect);
return;
}
// We don't want to paint white if we have overlay scrollbars, since we need
// to see what is behind it.
if (!hasOverlayScrollbars())
context->fillRect(absRect, Color::white, box->style()->colorSpace());
}
void RenderLayer::paintResizer(GraphicsContext* context, int tx, int ty, const IntRect& damageRect)
{
if (renderer()->style()->resize() == RESIZE_NONE)
return;
RenderBox* box = renderBox();
ASSERT(box);
IntRect cornerRect = resizerCornerRect(this, box->borderBoxRect());
IntRect absRect = IntRect(cornerRect.x() + tx, cornerRect.y() + ty, cornerRect.width(), cornerRect.height());
if (!absRect.intersects(damageRect))
return;
if (context->updatingControlTints()) {
updateResizerStyle();
return;
}
if (m_resizer) {
m_resizer->paintIntoRect(context, tx, ty, absRect);
return;
}
// Paint the resizer control.
DEFINE_STATIC_LOCAL(RefPtr<Image>, resizeCornerImage, (Image::loadPlatformResource("textAreaResizeCorner")));
IntPoint imagePoint(absRect.maxX() - resizeCornerImage->width(), absRect.maxY() - resizeCornerImage->height());
context->drawImage(resizeCornerImage.get(), box->style()->colorSpace(), imagePoint);
// Draw a frame around the resizer (1px grey line) if there are any scrollbars present.
// Clipping will exclude the right and bottom edges of this frame.
if (!hasOverlayScrollbars() && (m_vBar || m_hBar)) {
context->save();
context->clip(absRect);
IntRect largerCorner = absRect;
largerCorner.setSize(IntSize(largerCorner.width() + 1, largerCorner.height() + 1));
context->setStrokeColor(Color(makeRGB(217, 217, 217)), ColorSpaceDeviceRGB);
context->setStrokeThickness(1.0f);
context->setFillColor(Color::transparent, ColorSpaceDeviceRGB);
context->drawRect(largerCorner);
context->restore();
}
}
bool RenderLayer::isPointInResizeControl(const IntPoint& absolutePoint) const
{
if (!renderer()->hasOverflowClip() || renderer()->style()->resize() == RESIZE_NONE)
return false;
RenderBox* box = renderBox();
ASSERT(box);
IntPoint localPoint = absoluteToContents(absolutePoint);
IntRect localBounds(0, 0, box->width(), box->height());
return resizerCornerRect(this, localBounds).contains(localPoint);
}
bool RenderLayer::hitTestOverflowControls(HitTestResult& result, const IntPoint& localPoint)
{
if (!m_hBar && !m_vBar && (!renderer()->hasOverflowClip() || renderer()->style()->resize() == RESIZE_NONE))
return false;
RenderBox* box = renderBox();
ASSERT(box);
IntRect resizeControlRect;
if (renderer()->style()->resize() != RESIZE_NONE) {
resizeControlRect = resizerCornerRect(this, box->borderBoxRect());
if (resizeControlRect.contains(localPoint))
return true;
}
int resizeControlSize = max(resizeControlRect.height(), 0);
if (m_vBar) {
IntRect vBarRect(box->width() - box->borderRight() - m_vBar->width(),
box->borderTop(),
m_vBar->width(),
box->height() - (box->borderTop() + box->borderBottom()) - (m_hBar ? m_hBar->height() : resizeControlSize));
if (vBarRect.contains(localPoint)) {
result.setScrollbar(m_vBar.get());
return true;
}
}
resizeControlSize = max(resizeControlRect.width(), 0);
if (m_hBar) {
IntRect hBarRect(box->borderLeft(),
box->height() - box->borderBottom() - m_hBar->height(),
box->width() - (box->borderLeft() + box->borderRight()) - (m_vBar ? m_vBar->width() : resizeControlSize),
m_hBar->height());
if (hBarRect.contains(localPoint)) {
result.setScrollbar(m_hBar.get());
return true;
}
}
return false;
}
bool RenderLayer::scroll(ScrollDirection direction, ScrollGranularity granularity, float multiplier)
{
return ScrollableArea::scroll(direction, granularity, multiplier);
}
void RenderLayer::paint(GraphicsContext* p, const IntRect& damageRect, PaintBehavior paintBehavior, RenderObject *paintingRoot)
{
OverlapTestRequestMap overlapTestRequests;
paintLayer(this, p, damageRect, paintBehavior, paintingRoot, &overlapTestRequests);
OverlapTestRequestMap::iterator end = overlapTestRequests.end();
for (OverlapTestRequestMap::iterator it = overlapTestRequests.begin(); it != end; ++it)
it->first->setOverlapTestResult(false);
}
void RenderLayer::paintOverlayScrollbars(GraphicsContext* p, const IntRect& damageRect, PaintBehavior paintBehavior, RenderObject *paintingRoot)
{
if (!m_containsDirtyOverlayScrollbars)
return;
paintLayer(this, p, damageRect, paintBehavior, paintingRoot, 0, PaintLayerHaveTransparency | PaintLayerTemporaryClipRects
| PaintLayerPaintingOverlayScrollbars);
m_containsDirtyOverlayScrollbars = false;
}
static void setClip(GraphicsContext* p, const IntRect& paintDirtyRect, const IntRect& clipRect)
{
if (paintDirtyRect == clipRect)
return;
p->save();
p->clip(clipRect);
}
static void restoreClip(GraphicsContext* p, const IntRect& paintDirtyRect, const IntRect& clipRect)
{
if (paintDirtyRect == clipRect)
return;
p->restore();
}
static void performOverlapTests(OverlapTestRequestMap& overlapTestRequests, const RenderLayer* rootLayer, const RenderLayer* layer)
{
Vector<OverlapTestRequestClient*> overlappedRequestClients;
OverlapTestRequestMap::iterator end = overlapTestRequests.end();
IntRect boundingBox = layer->boundingBox(rootLayer);
for (OverlapTestRequestMap::iterator it = overlapTestRequests.begin(); it != end; ++it) {
if (!boundingBox.intersects(it->second))
continue;
it->first->setOverlapTestResult(true);
overlappedRequestClients.append(it->first);
}
for (size_t i = 0; i < overlappedRequestClients.size(); ++i)
overlapTestRequests.remove(overlappedRequestClients[i]);
}
#if USE(ACCELERATED_COMPOSITING)
static bool shouldDoSoftwarePaint(const RenderLayer* layer, bool paintingReflection)
{
return paintingReflection && !layer->has3DTransform();
}
#endif
void RenderLayer::paintLayer(RenderLayer* rootLayer, GraphicsContext* p,
const IntRect& paintDirtyRect, PaintBehavior paintBehavior,
RenderObject* paintingRoot, OverlapTestRequestMap* overlapTestRequests,
PaintLayerFlags paintFlags)
{
#if USE(ACCELERATED_COMPOSITING)
if (isComposited()) {
// The updatingControlTints() painting pass goes through compositing layers,
// but we need to ensure that we don't cache clip rects computed with the wrong root in this case.
if (p->updatingControlTints() || (paintBehavior & PaintBehaviorFlattenCompositingLayers))
paintFlags |= PaintLayerTemporaryClipRects;
else if (!backing()->paintingGoesToWindow() && !shouldDoSoftwarePaint(this, paintFlags & PaintLayerPaintingReflection)) {
// If this RenderLayer should paint into its backing, that will be done via RenderLayerBacking::paintIntoLayer().
return;
}
}
#endif
// Avoid painting layers when stylesheets haven't loaded. This eliminates FOUC.
// It's ok not to draw, because later on, when all the stylesheets do load, updateStyleSelector on the Document
// will do a full repaint().
if (renderer()->document()->didLayoutWithPendingStylesheets() && !renderer()->isRenderView() && !renderer()->isRoot())
return;
// If this layer is totally invisible then there is nothing to paint.
if (!renderer()->opacity())
return;
if (paintsWithTransparency(paintBehavior))
paintFlags |= PaintLayerHaveTransparency;
// Apply a transform if we have one. A reflection is considered to be a transform, since it is a flip and a translate.
if (paintsWithTransform(paintBehavior) && !(paintFlags & PaintLayerAppliedTransform)) {
TransformationMatrix layerTransform = renderableTransform(paintBehavior);
// If the transform can't be inverted, then don't paint anything.
if (!layerTransform.isInvertible())
return;
// If we have a transparency layer enclosing us and we are the root of a transform, then we need to establish the transparency
// layer from the parent now.
if (paintFlags & PaintLayerHaveTransparency)
parent()->beginTransparencyLayers(p, rootLayer, paintBehavior);
// Make sure the parent's clip rects have been calculated.
IntRect clipRect = paintDirtyRect;
if (parent()) {
clipRect = backgroundClipRect(rootLayer, paintFlags & PaintLayerTemporaryClipRects);
clipRect.intersect(paintDirtyRect);
}
// Push the parent coordinate space's clip.
setClip(p, paintDirtyRect, clipRect);
// Adjust the transform such that the renderer's upper left corner will paint at (0,0) in user space.
// This involves subtracting out the position of the layer in our current coordinate space.
int x = 0;
int y = 0;
convertToLayerCoords(rootLayer, x, y);
TransformationMatrix transform(layerTransform);
transform.translateRight(x, y);
// Apply the transform.
p->save();
p->concatCTM(transform.toAffineTransform());
// Now do a paint with the root layer shifted to be us.
paintLayer(this, p, transform.inverse().mapRect(paintDirtyRect), paintBehavior, paintingRoot, overlapTestRequests, paintFlags | PaintLayerAppliedTransform);
p->restore();
// Restore the clip.
restoreClip(p, paintDirtyRect, clipRect);
return;
}
PaintLayerFlags localPaintFlags = paintFlags & ~PaintLayerAppliedTransform;
bool haveTransparency = localPaintFlags & PaintLayerHaveTransparency;
// Paint the reflection first if we have one.
if (m_reflection && !m_paintingInsideReflection) {
// Mark that we are now inside replica painting.
m_paintingInsideReflection = true;
reflectionLayer()->paintLayer(rootLayer, p, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, localPaintFlags | PaintLayerPaintingReflection);
m_paintingInsideReflection = false;
}
// Calculate the clip rects we should use.
IntRect layerBounds, damageRect, clipRectToApply, outlineRect;
calculateRects(rootLayer, paintDirtyRect, layerBounds, damageRect, clipRectToApply, outlineRect, localPaintFlags & PaintLayerTemporaryClipRects);
int x = layerBounds.x();
int y = layerBounds.y();
int tx = x - renderBoxX();
int ty = y - renderBoxY();
// Ensure our lists are up-to-date.
updateCompositingAndLayerListsIfNeeded();
bool forceBlackText = paintBehavior & PaintBehaviorForceBlackText;
bool selectionOnly = paintBehavior & PaintBehaviorSelectionOnly;
// If this layer's renderer is a child of the paintingRoot, we render unconditionally, which
// is done by passing a nil paintingRoot down to our renderer (as if no paintingRoot was ever set).
// Else, our renderer tree may or may not contain the painting root, so we pass that root along
// so it will be tested against as we descend through the renderers.
RenderObject* paintingRootForRenderer = 0;
if (paintingRoot && !renderer()->isDescendantOf(paintingRoot))
paintingRootForRenderer = paintingRoot;
if (overlapTestRequests && isSelfPaintingLayer())
performOverlapTests(*overlapTestRequests, rootLayer, this);
bool paintingOverlayScrollbars = paintFlags & PaintLayerPaintingOverlayScrollbars;
// We want to paint our layer, but only if we intersect the damage rect.
bool shouldPaint = intersectsDamageRect(layerBounds, damageRect, rootLayer) && m_hasVisibleContent && isSelfPaintingLayer();
if (shouldPaint && !selectionOnly && !damageRect.isEmpty() && !paintingOverlayScrollbars) {
// Begin transparency layers lazily now that we know we have to paint something.
if (haveTransparency)
beginTransparencyLayers(p, rootLayer, paintBehavior);
// Paint our background first, before painting any child layers.
// Establish the clip used to paint our background.
setClip(p, paintDirtyRect, damageRect);
// Paint the background.
PaintInfo paintInfo(p, damageRect, PaintPhaseBlockBackground, false, paintingRootForRenderer, 0);
renderer()->paint(paintInfo, tx, ty);
// Restore the clip.
restoreClip(p, paintDirtyRect, damageRect);
}
// Now walk the sorted list of children with negative z-indices.
paintList(m_negZOrderList, rootLayer, p, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, localPaintFlags);
// Now establish the appropriate clip and paint our child RenderObjects.
if (shouldPaint && !clipRectToApply.isEmpty() && !paintingOverlayScrollbars) {
// Begin transparency layers lazily now that we know we have to paint something.
if (haveTransparency)
beginTransparencyLayers(p, rootLayer, paintBehavior);
// Set up the clip used when painting our children.
setClip(p, paintDirtyRect, clipRectToApply);
PaintInfo paintInfo(p, clipRectToApply,
selectionOnly ? PaintPhaseSelection : PaintPhaseChildBlockBackgrounds,
forceBlackText, paintingRootForRenderer, 0);
renderer()->paint(paintInfo, tx, ty);
if (!selectionOnly) {
paintInfo.phase = PaintPhaseFloat;
renderer()->paint(paintInfo, tx, ty);
paintInfo.phase = PaintPhaseForeground;
paintInfo.overlapTestRequests = overlapTestRequests;
renderer()->paint(paintInfo, tx, ty);
paintInfo.phase = PaintPhaseChildOutlines;
renderer()->paint(paintInfo, tx, ty);
}
// Now restore our clip.
restoreClip(p, paintDirtyRect, clipRectToApply);
}
if (!outlineRect.isEmpty() && isSelfPaintingLayer() && !paintingOverlayScrollbars) {
// Paint our own outline
PaintInfo paintInfo(p, outlineRect, PaintPhaseSelfOutline, false, paintingRootForRenderer, 0);
setClip(p, paintDirtyRect, outlineRect);
renderer()->paint(paintInfo, tx, ty);
restoreClip(p, paintDirtyRect, outlineRect);
}
// Paint any child layers that have overflow.
paintList(m_normalFlowList, rootLayer, p, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, localPaintFlags);
// Now walk the sorted list of children with positive z-indices.
paintList(m_posZOrderList, rootLayer, p, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, localPaintFlags);
if (renderer()->hasMask() && shouldPaint && !selectionOnly && !damageRect.isEmpty() && !paintingOverlayScrollbars) {
setClip(p, paintDirtyRect, damageRect);
// Paint the mask.
PaintInfo paintInfo(p, damageRect, PaintPhaseMask, false, paintingRootForRenderer, 0);
renderer()->paint(paintInfo, tx, ty);
// Restore the clip.
restoreClip(p, paintDirtyRect, damageRect);
}
if (paintingOverlayScrollbars) {
setClip(p, paintDirtyRect, damageRect);
paintOverflowControls(p, tx, ty, damageRect, true);
restoreClip(p, paintDirtyRect, damageRect);
}
// End our transparency layer
if (haveTransparency && m_usedTransparency && !m_paintingInsideReflection) {
p->endTransparencyLayer();
p->restore();
m_usedTransparency = false;
}
}
void RenderLayer::paintList(Vector<RenderLayer*>* list, RenderLayer* rootLayer, GraphicsContext* p,
const IntRect& paintDirtyRect, PaintBehavior paintBehavior,
RenderObject* paintingRoot, OverlapTestRequestMap* overlapTestRequests,
PaintLayerFlags paintFlags)
{
if (!list)
return;
for (size_t i = 0; i < list->size(); ++i) {
RenderLayer* childLayer = list->at(i);
if (!childLayer->isPaginated())
childLayer->paintLayer(rootLayer, p, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, paintFlags);
else
paintPaginatedChildLayer(childLayer, rootLayer, p, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, paintFlags);
}
}
void RenderLayer::paintPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, GraphicsContext* context,
const IntRect& paintDirtyRect, PaintBehavior paintBehavior,
RenderObject* paintingRoot, OverlapTestRequestMap* overlapTestRequests,
PaintLayerFlags paintFlags)
{
// We need to do multiple passes, breaking up our child layer into strips.
Vector<RenderLayer*> columnLayers;
RenderLayer* ancestorLayer = isNormalFlowOnly() ? parent() : stackingContext();
for (RenderLayer* curr = childLayer->parent(); curr; curr = curr->parent()) {
if (curr->renderer()->hasColumns() && checkContainingBlockChainForPagination(childLayer->renderer(), curr->renderBox()))
columnLayers.append(curr);
if (curr == ancestorLayer)
break;
}
ASSERT(columnLayers.size());
paintChildLayerIntoColumns(childLayer, rootLayer, context, paintDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, paintFlags, columnLayers, columnLayers.size() - 1);
}
void RenderLayer::paintChildLayerIntoColumns(RenderLayer* childLayer, RenderLayer* rootLayer, GraphicsContext* context,
const IntRect& paintDirtyRect, PaintBehavior paintBehavior,
RenderObject* paintingRoot, OverlapTestRequestMap* overlapTestRequests,
PaintLayerFlags paintFlags, const Vector<RenderLayer*>& columnLayers, size_t colIndex)
{
RenderBlock* columnBlock = toRenderBlock(columnLayers[colIndex]->renderer());
ASSERT(columnBlock && columnBlock->hasColumns());
if (!columnBlock || !columnBlock->hasColumns())
return;
int layerX = 0;
int layerY = 0;
columnBlock->layer()->convertToLayerCoords(rootLayer, layerX, layerY);
bool isHorizontal = columnBlock->style()->isHorizontalWritingMode();
ColumnInfo* colInfo = columnBlock->columnInfo();
unsigned colCount = columnBlock->columnCount(colInfo);
int currLogicalTopOffset = 0;
for (unsigned i = 0; i < colCount; i++) {
// For each rect, we clip to the rect, and then we adjust our coords.
IntRect colRect = columnBlock->columnRectAt(colInfo, i);
columnBlock->flipForWritingMode(colRect);
int logicalLeftOffset = (isHorizontal ? colRect.x() : colRect.y()) - columnBlock->logicalLeftOffsetForContent();
IntSize offset = isHorizontal ? IntSize(logicalLeftOffset, currLogicalTopOffset) : IntSize(currLogicalTopOffset, logicalLeftOffset);
colRect.move(layerX, layerY);
IntRect localDirtyRect(paintDirtyRect);
localDirtyRect.intersect(colRect);
if (!localDirtyRect.isEmpty()) {
context->save();
// Each strip pushes a clip, since column boxes are specified as being
// like overflow:hidden.
context->clip(colRect);
if (!colIndex) {
// Apply a translation transform to change where the layer paints.
TransformationMatrix oldTransform;
bool oldHasTransform = childLayer->transform();
if (oldHasTransform)
oldTransform = *childLayer->transform();
TransformationMatrix newTransform(oldTransform);
newTransform.translateRight(offset.width(), offset.height());
childLayer->m_transform.set(new TransformationMatrix(newTransform));
childLayer->paintLayer(rootLayer, context, localDirtyRect, paintBehavior, paintingRoot, overlapTestRequests, paintFlags);
if (oldHasTransform)
childLayer->m_transform.set(new TransformationMatrix(oldTransform));
else
childLayer->m_transform.clear();
} else {
// Adjust the transform such that the renderer's upper left corner will paint at (0,0) in user space.
// This involves subtracting out the position of the layer in our current coordinate space.
int childX = 0;
int childY = 0;
columnLayers[colIndex - 1]->convertToLayerCoords(rootLayer, childX, childY);
TransformationMatrix transform;
transform.translateRight(childX + offset.width(), childY + offset.height());
// Apply the transform.
context->concatCTM(transform.toAffineTransform());
// Now do a paint with the root layer shifted to be the next multicol block.
paintChildLayerIntoColumns(childLayer, columnLayers[colIndex - 1], context, transform.inverse().mapRect(localDirtyRect), paintBehavior,
paintingRoot, overlapTestRequests, paintFlags,
columnLayers, colIndex - 1);
}
context->restore();
}
// Move to the next position.
int blockDelta = isHorizontal ? colRect.height() : colRect.width();
if (columnBlock->style()->isFlippedBlocksWritingMode())
currLogicalTopOffset += blockDelta;
else
currLogicalTopOffset -= blockDelta;
}
}
static inline IntRect frameVisibleRect(RenderObject* renderer)
{
FrameView* frameView = renderer->document()->view();
if (!frameView)
return IntRect();
return frameView->visibleContentRect();
}
bool RenderLayer::hitTest(const HitTestRequest& request, HitTestResult& result)
{
renderer()->document()->updateLayout();
IntRect hitTestArea = renderer()->view()->documentRect();
if (!request.ignoreClipping())
hitTestArea.intersect(frameVisibleRect(renderer()));
RenderLayer* insideLayer = hitTestLayer(this, 0, request, result, hitTestArea, result.point(), false);
if (!insideLayer) {
// We didn't hit any layer. If we are the root layer and the mouse is -- or just was -- down,
// return ourselves. We do this so mouse events continue getting delivered after a drag has
// exited the WebView, and so hit testing over a scrollbar hits the content document.
if ((request.active() || request.mouseUp()) && renderer()->isRenderView()) {
renderer()->updateHitTestResult(result, result.point());
insideLayer = this;
}
}
// Now determine if the result is inside an anchor - if the urlElement isn't already set.
Node* node = result.innerNode();
if (node && !result.URLElement())
result.setURLElement(static_cast<Element*>(node->enclosingLinkEventParentOrSelf()));
// Next set up the correct :hover/:active state along the new chain.
updateHoverActiveState(request, result);
// Now return whether we were inside this layer (this will always be true for the root
// layer).
return insideLayer;
}
Node* RenderLayer::enclosingElement() const
{
for (RenderObject* r = renderer(); r; r = r->parent()) {
if (Node* e = r->node())
return e;
}
ASSERT_NOT_REACHED();
return 0;
}
// Compute the z-offset of the point in the transformState.
// This is effectively projecting a ray normal to the plane of ancestor, finding where that
// ray intersects target, and computing the z delta between those two points.
static double computeZOffset(const HitTestingTransformState& transformState)
{
// We got an affine transform, so no z-offset
if (transformState.m_accumulatedTransform.isAffine())
return 0;
// Flatten the point into the target plane
FloatPoint targetPoint = transformState.mappedPoint();
// Now map the point back through the transform, which computes Z.
FloatPoint3D backmappedPoint = transformState.m_accumulatedTransform.mapPoint(FloatPoint3D(targetPoint));
return backmappedPoint.z();
}
PassRefPtr<HitTestingTransformState> RenderLayer::createLocalTransformState(RenderLayer* rootLayer, RenderLayer* containerLayer,
const IntRect& hitTestRect, const IntPoint& hitTestPoint,
const HitTestingTransformState* containerTransformState) const
{
RefPtr<HitTestingTransformState> transformState;
int offsetX = 0;
int offsetY = 0;
if (containerTransformState) {
// If we're already computing transform state, then it's relative to the container (which we know is non-null).
transformState = HitTestingTransformState::create(*containerTransformState);
convertToLayerCoords(containerLayer, offsetX, offsetY);
} else {
// If this is the first time we need to make transform state, then base it off of hitTestPoint,
// which is relative to rootLayer.
transformState = HitTestingTransformState::create(hitTestPoint, FloatQuad(hitTestRect));
convertToLayerCoords(rootLayer, offsetX, offsetY);
}
RenderObject* containerRenderer = containerLayer ? containerLayer->renderer() : 0;
if (renderer()->shouldUseTransformFromContainer(containerRenderer)) {
TransformationMatrix containerTransform;
renderer()->getTransformFromContainer(containerRenderer, IntSize(offsetX, offsetY), containerTransform);
transformState->applyTransform(containerTransform, HitTestingTransformState::AccumulateTransform);
} else {
transformState->translate(offsetX, offsetY, HitTestingTransformState::AccumulateTransform);
}
return transformState;
}
static bool isHitCandidate(const RenderLayer* hitLayer, bool canDepthSort, double* zOffset, const HitTestingTransformState* transformState)
{
if (!hitLayer)
return false;
// The hit layer is depth-sorting with other layers, so just say that it was hit.
if (canDepthSort)
return true;
// We need to look at z-depth to decide if this layer was hit.
if (zOffset) {
ASSERT(transformState);
// This is actually computing our z, but that's OK because the hitLayer is coplanar with us.
double childZOffset = computeZOffset(*transformState);
if (childZOffset > *zOffset) {
*zOffset = childZOffset;
return true;
}
return false;
}
return true;
}
// hitTestPoint and hitTestRect are relative to rootLayer.
// A 'flattening' layer is one preserves3D() == false.
// transformState.m_accumulatedTransform holds the transform from the containing flattening layer.
// transformState.m_lastPlanarPoint is the hitTestPoint in the plane of the containing flattening layer.
// transformState.m_lastPlanarQuad is the hitTestRect as a quad in the plane of the containing flattening layer.
//
// If zOffset is non-null (which indicates that the caller wants z offset information),
// *zOffset on return is the z offset of the hit point relative to the containing flattening layer.
RenderLayer* RenderLayer::hitTestLayer(RenderLayer* rootLayer, RenderLayer* containerLayer, const HitTestRequest& request, HitTestResult& result,
const IntRect& hitTestRect, const IntPoint& hitTestPoint, bool appliedTransform,
const HitTestingTransformState* transformState, double* zOffset)
{
// The natural thing would be to keep HitTestingTransformState on the stack, but it's big, so we heap-allocate.
bool useTemporaryClipRects = false;
#if USE(ACCELERATED_COMPOSITING)
useTemporaryClipRects = compositor()->inCompositingMode();
#endif
useTemporaryClipRects |= renderer()->view()->frameView()->containsScrollableAreaWithOverlayScrollbars();
IntRect hitTestArea = result.rectForPoint(hitTestPoint);
// Apply a transform if we have one.
if (transform() && !appliedTransform) {
// Make sure the parent's clip rects have been calculated.
if (parent()) {
IntRect clipRect = backgroundClipRect(rootLayer, useTemporaryClipRects, IncludeOverlayScrollbarSize);
// Go ahead and test the enclosing clip now.
if (!clipRect.intersects(hitTestArea))
return 0;
}
// Create a transform state to accumulate this transform.
RefPtr<HitTestingTransformState> newTransformState = createLocalTransformState(rootLayer, containerLayer, hitTestRect, hitTestPoint, transformState);
// If the transform can't be inverted, then don't hit test this layer at all.
if (!newTransformState->m_accumulatedTransform.isInvertible())
return 0;
// Compute the point and the hit test rect in the coords of this layer by using the values
// from the transformState, which store the point and quad in the coords of the last flattened
// layer, and the accumulated transform which lets up map through preserve-3d layers.
//
// We can't just map hitTestPoint and hitTestRect because they may have been flattened (losing z)
// by our container.
IntPoint localPoint = roundedIntPoint(newTransformState->mappedPoint());
IntRect localHitTestRect;
#if USE(ACCELERATED_COMPOSITING)
if (isComposited()) {
// It doesn't make sense to project hitTestRect into the plane of this layer, so use the same bounds we use for painting.
localHitTestRect = backing()->compositedBounds();
} else
#endif
localHitTestRect = newTransformState->mappedQuad().enclosingBoundingBox();
// Now do a hit test with the root layer shifted to be us.
return hitTestLayer(this, containerLayer, request, result, localHitTestRect, localPoint, true, newTransformState.get(), zOffset);
}
// Ensure our lists and 3d status are up-to-date.
updateCompositingAndLayerListsIfNeeded();
update3DTransformedDescendantStatus();
RefPtr<HitTestingTransformState> localTransformState;
if (appliedTransform) {
// We computed the correct state in the caller (above code), so just reference it.
ASSERT(transformState);
localTransformState = const_cast<HitTestingTransformState*>(transformState);
} else if (transformState || m_has3DTransformedDescendant || preserves3D()) {
// We need transform state for the first time, or to offset the container state, so create it here.
localTransformState = createLocalTransformState(rootLayer, containerLayer, hitTestRect, hitTestPoint, transformState);
}
// Check for hit test on backface if backface-visibility is 'hidden'
if (localTransformState && renderer()->style()->backfaceVisibility() == BackfaceVisibilityHidden) {
TransformationMatrix invertedMatrix = localTransformState->m_accumulatedTransform.inverse();
// If the z-vector of the matrix is negative, the back is facing towards the viewer.
if (invertedMatrix.m33() < 0)
return 0;
}
RefPtr<HitTestingTransformState> unflattenedTransformState = localTransformState;
if (localTransformState && !preserves3D()) {
// Keep a copy of the pre-flattening state, for computing z-offsets for the container
unflattenedTransformState = HitTestingTransformState::create(*localTransformState);
// This layer is flattening, so flatten the state passed to descendants.
localTransformState->flatten();
}
// Calculate the clip rects we should use.
IntRect layerBounds;
IntRect bgRect;
IntRect fgRect;
IntRect outlineRect;
calculateRects(rootLayer, hitTestRect, layerBounds, bgRect, fgRect, outlineRect, useTemporaryClipRects, IncludeOverlayScrollbarSize);
// The following are used for keeping track of the z-depth of the hit point of 3d-transformed
// descendants.
double localZOffset = -numeric_limits<double>::infinity();
double* zOffsetForDescendantsPtr = 0;
double* zOffsetForContentsPtr = 0;
bool depthSortDescendants = false;
if (preserves3D()) {
depthSortDescendants = true;
// Our layers can depth-test with our container, so share the z depth pointer with the container, if it passed one down.
zOffsetForDescendantsPtr = zOffset ? zOffset : &localZOffset;
zOffsetForContentsPtr = zOffset ? zOffset : &localZOffset;
} else if (m_has3DTransformedDescendant) {
// Flattening layer with 3d children; use a local zOffset pointer to depth-test children and foreground.
depthSortDescendants = true;
zOffsetForDescendantsPtr = zOffset ? zOffset : &localZOffset;
zOffsetForContentsPtr = zOffset ? zOffset : &localZOffset;
} else if (zOffset) {
zOffsetForDescendantsPtr = 0;
// Container needs us to give back a z offset for the hit layer.
zOffsetForContentsPtr = zOffset;
}
// This variable tracks which layer the mouse ends up being inside.
RenderLayer* candidateLayer = 0;
// Begin by walking our list of positive layers from highest z-index down to the lowest z-index.
RenderLayer* hitLayer = hitTestList(m_posZOrderList, rootLayer, request, result, hitTestRect, hitTestPoint,
localTransformState.get(), zOffsetForDescendantsPtr, zOffset, unflattenedTransformState.get(), depthSortDescendants);
if (hitLayer) {
if (!depthSortDescendants)
return hitLayer;
candidateLayer = hitLayer;
}
// Now check our overflow objects.
hitLayer = hitTestList(m_normalFlowList, rootLayer, request, result, hitTestRect, hitTestPoint,
localTransformState.get(), zOffsetForDescendantsPtr, zOffset, unflattenedTransformState.get(), depthSortDescendants);
if (hitLayer) {
if (!depthSortDescendants)
return hitLayer;
candidateLayer = hitLayer;
}
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
if (hasOverflowParent()) {
ClipRects clipRects;
calculateClipRects(rootLayer, clipRects, useTemporaryClipRects);
fgRect.intersect(clipRects.hitTestClip());
bgRect.intersect(clipRects.hitTestClip());
}
#endif
// Next we want to see if the mouse pos is inside the child RenderObjects of the layer.
if (fgRect.intersects(hitTestArea) && isSelfPaintingLayer()) {
// Hit test with a temporary HitTestResult, because we only want to commit to 'result' if we know we're frontmost.
HitTestResult tempResult(result.point(), result.topPadding(), result.rightPadding(), result.bottomPadding(), result.leftPadding());
if (hitTestContents(request, tempResult, layerBounds, hitTestPoint, HitTestDescendants) &&
isHitCandidate(this, false, zOffsetForContentsPtr, unflattenedTransformState.get())) {
if (result.isRectBasedTest())
result.append(tempResult);
else
result = tempResult;
if (!depthSortDescendants)
return this;
// Foreground can depth-sort with descendant layers, so keep this as a candidate.
candidateLayer = this;
} else if (result.isRectBasedTest())
result.append(tempResult);
}
// Now check our negative z-index children.
hitLayer = hitTestList(m_negZOrderList, rootLayer, request, result, hitTestRect, hitTestPoint,
localTransformState.get(), zOffsetForDescendantsPtr, zOffset, unflattenedTransformState.get(), depthSortDescendants);
if (hitLayer) {
if (!depthSortDescendants)
return hitLayer;
candidateLayer = hitLayer;
}
// If we found a layer, return. Child layers, and foreground always render in front of background.
if (candidateLayer)
return candidateLayer;
if (bgRect.intersects(hitTestArea) && isSelfPaintingLayer()) {
HitTestResult tempResult(result.point(), result.topPadding(), result.rightPadding(), result.bottomPadding(), result.leftPadding());
if (hitTestContents(request, tempResult, layerBounds, hitTestPoint, HitTestSelf) &&
isHitCandidate(this, false, zOffsetForContentsPtr, unflattenedTransformState.get())) {
if (result.isRectBasedTest())
result.append(tempResult);
else
result = tempResult;
return this;
} else if (result.isRectBasedTest())
result.append(tempResult);
}
return 0;
}
bool RenderLayer::hitTestContents(const HitTestRequest& request, HitTestResult& result, const IntRect& layerBounds, const IntPoint& hitTestPoint, HitTestFilter hitTestFilter) const
{
if (!renderer()->hitTest(request, result, hitTestPoint,
layerBounds.x() - renderBoxX(),
layerBounds.y() - renderBoxY(),
hitTestFilter)) {
// It's wrong to set innerNode, but then claim that you didn't hit anything, unless it is
// a rect-based test.
ASSERT(!result.innerNode() || (result.isRectBasedTest() && result.rectBasedTestResult().size()));
return false;
}
// For positioned generated content, we might still not have a
// node by the time we get to the layer level, since none of
// the content in the layer has an element. So just walk up
// the tree.
if (!result.innerNode() || !result.innerNonSharedNode()) {
Node* e = enclosingElement();
if (!result.innerNode())
result.setInnerNode(e);
if (!result.innerNonSharedNode())
result.setInnerNonSharedNode(e);
}
return true;
}
RenderLayer* RenderLayer::hitTestList(Vector<RenderLayer*>* list, RenderLayer* rootLayer,
const HitTestRequest& request, HitTestResult& result,
const IntRect& hitTestRect, const IntPoint& hitTestPoint,
const HitTestingTransformState* transformState,
double* zOffsetForDescendants, double* zOffset,
const HitTestingTransformState* unflattenedTransformState,
bool depthSortDescendants)
{
if (!list)
return 0;
RenderLayer* resultLayer = 0;
for (int i = list->size() - 1; i >= 0; --i) {
RenderLayer* childLayer = list->at(i);
RenderLayer* hitLayer = 0;
HitTestResult tempResult(result.point(), result.topPadding(), result.rightPadding(), result.bottomPadding(), result.leftPadding());
if (childLayer->isPaginated())
hitLayer = hitTestPaginatedChildLayer(childLayer, rootLayer, request, tempResult, hitTestRect, hitTestPoint, transformState, zOffsetForDescendants);
else
hitLayer = childLayer->hitTestLayer(rootLayer, this, request, tempResult, hitTestRect, hitTestPoint, false, transformState, zOffsetForDescendants);
// If it a rect-based test, we can safely append the temporary result since it might had hit
// nodes but not necesserily had hitLayer set.
if (result.isRectBasedTest())
result.append(tempResult);
if (isHitCandidate(hitLayer, depthSortDescendants, zOffset, unflattenedTransformState)) {
resultLayer = hitLayer;
if (!result.isRectBasedTest())
result = tempResult;
if (!depthSortDescendants)
break;
}
}
return resultLayer;
}
RenderLayer* RenderLayer::hitTestPaginatedChildLayer(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
const IntRect& hitTestRect, const IntPoint& hitTestPoint, const HitTestingTransformState* transformState, double* zOffset)
{
Vector<RenderLayer*> columnLayers;
RenderLayer* ancestorLayer = isNormalFlowOnly() ? parent() : stackingContext();
for (RenderLayer* curr = childLayer->parent(); curr; curr = curr->parent()) {
if (curr->renderer()->hasColumns() && checkContainingBlockChainForPagination(childLayer->renderer(), curr->renderBox()))
columnLayers.append(curr);
if (curr == ancestorLayer)
break;
}
ASSERT(columnLayers.size());
return hitTestChildLayerColumns(childLayer, rootLayer, request, result, hitTestRect, hitTestPoint, transformState, zOffset,
columnLayers, columnLayers.size() - 1);
}
RenderLayer* RenderLayer::hitTestChildLayerColumns(RenderLayer* childLayer, RenderLayer* rootLayer, const HitTestRequest& request, HitTestResult& result,
const IntRect& hitTestRect, const IntPoint& hitTestPoint, const HitTestingTransformState* transformState, double* zOffset,
const Vector<RenderLayer*>& columnLayers, size_t columnIndex)
{
RenderBlock* columnBlock = toRenderBlock(columnLayers[columnIndex]->renderer());
ASSERT(columnBlock && columnBlock->hasColumns());
if (!columnBlock || !columnBlock->hasColumns())
return 0;
int layerX = 0;
int layerY = 0;
columnBlock->layer()->convertToLayerCoords(rootLayer, layerX, layerY);
ColumnInfo* colInfo = columnBlock->columnInfo();
int colCount = columnBlock->columnCount(colInfo);
// We have to go backwards from the last column to the first.
bool isHorizontal = columnBlock->style()->isHorizontalWritingMode();
int logicalLeft = columnBlock->logicalLeftOffsetForContent();
int currLogicalTopOffset = 0;
int i;
for (i = 0; i < colCount; i++) {
IntRect colRect = columnBlock->columnRectAt(colInfo, i);
int blockDelta = (isHorizontal ? colRect.height() : colRect.width());
if (columnBlock->style()->isFlippedBlocksWritingMode())
currLogicalTopOffset += blockDelta;
else
currLogicalTopOffset -= blockDelta;
}
for (i = colCount - 1; i >= 0; i--) {
// For each rect, we clip to the rect, and then we adjust our coords.
IntRect colRect = columnBlock->columnRectAt(colInfo, i);
columnBlock->flipForWritingMode(colRect);
int currLogicalLeftOffset = (isHorizontal ? colRect.x() : colRect.y()) - logicalLeft;
int blockDelta = (isHorizontal ? colRect.height() : colRect.width());
if (columnBlock->style()->isFlippedBlocksWritingMode())
currLogicalTopOffset -= blockDelta;
else
currLogicalTopOffset += blockDelta;
colRect.move(layerX, layerY);
IntRect localClipRect(hitTestRect);
localClipRect.intersect(colRect);
IntSize offset = isHorizontal ? IntSize(currLogicalLeftOffset, currLogicalTopOffset) : IntSize(currLogicalTopOffset, currLogicalLeftOffset);
if (!localClipRect.isEmpty() && localClipRect.intersects(result.rectForPoint(hitTestPoint))) {
RenderLayer* hitLayer = 0;
if (!columnIndex) {
// Apply a translation transform to change where the layer paints.
TransformationMatrix oldTransform;
bool oldHasTransform = childLayer->transform();
if (oldHasTransform)
oldTransform = *childLayer->transform();
TransformationMatrix newTransform(oldTransform);
newTransform.translateRight(offset.width(), offset.height());
childLayer->m_transform.set(new TransformationMatrix(newTransform));
hitLayer = childLayer->hitTestLayer(rootLayer, columnLayers[0], request, result, localClipRect, hitTestPoint, false, transformState, zOffset);
if (oldHasTransform)
childLayer->m_transform.set(new TransformationMatrix(oldTransform));
else
childLayer->m_transform.clear();
} else {
// Adjust the transform such that the renderer's upper left corner will be at (0,0) in user space.
// This involves subtracting out the position of the layer in our current coordinate space.
RenderLayer* nextLayer = columnLayers[columnIndex - 1];
RefPtr<HitTestingTransformState> newTransformState = nextLayer->createLocalTransformState(rootLayer, nextLayer, localClipRect, hitTestPoint, transformState);
newTransformState->translate(offset.width(), offset.height(), HitTestingTransformState::AccumulateTransform);
IntPoint localPoint = roundedIntPoint(newTransformState->mappedPoint());
IntRect localHitTestRect = newTransformState->mappedQuad().enclosingBoundingBox();
newTransformState->flatten();
hitLayer = hitTestChildLayerColumns(childLayer, columnLayers[columnIndex - 1], request, result, localHitTestRect, localPoint,
newTransformState.get(), zOffset, columnLayers, columnIndex - 1);
}
if (hitLayer)
return hitLayer;
}
}
return 0;
}
void RenderLayer::updateClipRects(const RenderLayer* rootLayer, OverlayScrollbarSizeRelevancy relevancy)
{
if (m_clipRects) {
ASSERT(rootLayer == m_clipRectsRoot);
return; // We have the correct cached value.
}
// For transformed layers, the root layer was shifted to be us, so there is no need to
// examine the parent. We want to cache clip rects with us as the root.
RenderLayer* parentLayer = rootLayer != this ? parent() : 0;
if (parentLayer)
parentLayer->updateClipRects(rootLayer, relevancy);
ClipRects clipRects;
calculateClipRects(rootLayer, clipRects, true, relevancy);
if (parentLayer && parentLayer->clipRects() && clipRects == *parentLayer->clipRects())
m_clipRects = parentLayer->clipRects();
else
m_clipRects = new (renderer()->renderArena()) ClipRects(clipRects);
m_clipRects->ref();
#ifndef NDEBUG
m_clipRectsRoot = rootLayer;
#endif
}
void RenderLayer::calculateClipRects(const RenderLayer* rootLayer, ClipRects& clipRects, bool useCached, OverlayScrollbarSizeRelevancy relevancy) const
{
if (!parent()) {
// The root layer's clip rect is always infinite.
clipRects.reset(PaintInfo::infiniteRect());
return;
}
// For transformed layers, the root layer was shifted to be us, so there is no need to
// examine the parent. We want to cache clip rects with us as the root.
RenderLayer* parentLayer = rootLayer != this ? parent() : 0;
// Ensure that our parent's clip has been calculated so that we can examine the values.
if (parentLayer) {
if (useCached && parentLayer->clipRects())
clipRects = *parentLayer->clipRects();
else
parentLayer->calculateClipRects(rootLayer, clipRects);
}
else
clipRects.reset(PaintInfo::infiniteRect());
// A fixed object is essentially the root of its containing block hierarchy, so when
// we encounter such an object, we reset our clip rects to the fixedClipRect.
if (renderer()->style()->position() == FixedPosition) {
clipRects.setPosClipRect(clipRects.fixedClipRect());
clipRects.setOverflowClipRect(clipRects.fixedClipRect());
clipRects.setFixed(true);
}
else if (renderer()->style()->position() == RelativePosition)
clipRects.setPosClipRect(clipRects.overflowClipRect());
else if (renderer()->style()->position() == AbsolutePosition)
clipRects.setOverflowClipRect(clipRects.posClipRect());
// Update the clip rects that will be passed to child layers.
if (renderer()->hasOverflowClip() || renderer()->hasClip()) {
// This layer establishes a clip of some kind.
int x = 0;
int y = 0;
convertToLayerCoords(rootLayer, x, y);
RenderView* view = renderer()->view();
ASSERT(view);
if (view && clipRects.fixed() && rootLayer->renderer() == view) {
x -= view->frameView()->scrollXForFixedPosition();
y -= view->frameView()->scrollYForFixedPosition();
}
if (renderer()->hasOverflowClip()) {
IntRect newOverflowClip = toRenderBox(renderer())->overflowClipRect(x, y, relevancy);
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
clipRects.setHitTestClip(intersection(clipRects.fixed() ? clipRects.fixedClipRect()
: newOverflowClip, clipRects.hitTestClip()));
if (hasOverflowScroll()) {
RenderBox* box = toRenderBox(renderer());
newOverflowClip =
IntRect(x + box->borderLeft(), y + box->borderTop(),
m_scrollWidth, m_scrollHeight);
}
#endif
clipRects.setOverflowClipRect(intersection(newOverflowClip, clipRects.overflowClipRect()));
if (renderer()->isPositioned() || renderer()->isRelPositioned())
clipRects.setPosClipRect(intersection(newOverflowClip, clipRects.posClipRect()));
}
if (renderer()->hasClip()) {
IntRect newPosClip = toRenderBox(renderer())->clipRect(x, y);
clipRects.setPosClipRect(intersection(newPosClip, clipRects.posClipRect()));
clipRects.setOverflowClipRect(intersection(newPosClip, clipRects.overflowClipRect()));
clipRects.setFixedClipRect(intersection(newPosClip, clipRects.fixedClipRect()));
}
}
}
void RenderLayer::parentClipRects(const RenderLayer* rootLayer, ClipRects& clipRects, bool temporaryClipRects, OverlayScrollbarSizeRelevancy relevancy) const
{
ASSERT(parent());
if (temporaryClipRects) {
parent()->calculateClipRects(rootLayer, clipRects, false, relevancy);
return;
}
parent()->updateClipRects(rootLayer, relevancy);
clipRects = *parent()->clipRects();
}
IntRect RenderLayer::backgroundClipRect(const RenderLayer* rootLayer, bool temporaryClipRects, OverlayScrollbarSizeRelevancy relevancy) const
{
IntRect backgroundRect;
if (parent()) {
ClipRects parentRects;
parentClipRects(rootLayer, parentRects, temporaryClipRects, relevancy);
backgroundRect = renderer()->style()->position() == FixedPosition ? parentRects.fixedClipRect() :
(renderer()->isPositioned() ? parentRects.posClipRect() :
parentRects.overflowClipRect());
RenderView* view = renderer()->view();
ASSERT(view);
if (view && parentRects.fixed() && rootLayer->renderer() == view)
backgroundRect.move(view->frameView()->scrollXForFixedPosition(), view->frameView()->scrollYForFixedPosition());
}
return backgroundRect;
}
void RenderLayer::calculateRects(const RenderLayer* rootLayer, const IntRect& paintDirtyRect, IntRect& layerBounds,
IntRect& backgroundRect, IntRect& foregroundRect, IntRect& outlineRect, bool temporaryClipRects,
OverlayScrollbarSizeRelevancy relevancy) const
{
if (rootLayer != this && parent()) {
backgroundRect = backgroundClipRect(rootLayer, temporaryClipRects, relevancy);
backgroundRect.intersect(paintDirtyRect);
} else
backgroundRect = paintDirtyRect;
foregroundRect = backgroundRect;
outlineRect = backgroundRect;
int x = 0;
int y = 0;
convertToLayerCoords(rootLayer, x, y);
layerBounds = IntRect(x, y, width(), height());
// Update the clip rects that will be passed to child layers.
if (renderer()->hasOverflowClip() || renderer()->hasClip()) {
// This layer establishes a clip of some kind.
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
if (hasOverflowScroll()) {
// Use the entire foreground rectangle to record the contents.
RenderBox* box = toRenderBox(renderer());
foregroundRect =
IntRect(x + box->borderLeft(), y + box->borderTop(),
m_scrollWidth, m_scrollHeight);
} else
#endif
if (renderer()->hasOverflowClip())
foregroundRect.intersect(toRenderBox(renderer())->overflowClipRect(x, y, relevancy));
if (renderer()->hasClip()) {
// Clip applies to *us* as well, so go ahead and update the damageRect.
IntRect newPosClip = toRenderBox(renderer())->clipRect(x, y);
backgroundRect.intersect(newPosClip);
foregroundRect.intersect(newPosClip);
outlineRect.intersect(newPosClip);
}
// If we establish a clip at all, then go ahead and make sure our background
// rect is intersected with our layer's bounds.
// FIXME: This could be changed to just use generic visual overflow.
// See https://bugs.webkit.org/show_bug.cgi?id=37467 for more information.
if (const ShadowData* boxShadow = renderer()->style()->boxShadow()) {
IntRect overflow = layerBounds;
do {
if (boxShadow->style() == Normal) {
IntRect shadowRect = layerBounds;
shadowRect.move(boxShadow->x(), boxShadow->y());
shadowRect.inflate(boxShadow->blur() + boxShadow->spread());
overflow.unite(shadowRect);
}
boxShadow = boxShadow->next();
} while (boxShadow);
backgroundRect.intersect(overflow);
} else
backgroundRect.intersect(layerBounds);
}
}
IntRect RenderLayer::childrenClipRect() const
{
RenderView* renderView = renderer()->view();
RenderLayer* clippingRootLayer = clippingRoot();
IntRect layerBounds, backgroundRect, foregroundRect, outlineRect;
calculateRects(clippingRootLayer, renderView->documentRect(), layerBounds, backgroundRect, foregroundRect, outlineRect);
return clippingRootLayer->renderer()->localToAbsoluteQuad(FloatQuad(foregroundRect)).enclosingBoundingBox();
}
IntRect RenderLayer::selfClipRect() const
{
RenderView* renderView = renderer()->view();
RenderLayer* clippingRootLayer = clippingRoot();
IntRect layerBounds, backgroundRect, foregroundRect, outlineRect;
calculateRects(clippingRootLayer, renderView->documentRect(), layerBounds, backgroundRect, foregroundRect, outlineRect);
return clippingRootLayer->renderer()->localToAbsoluteQuad(FloatQuad(backgroundRect)).enclosingBoundingBox();
}
void RenderLayer::addBlockSelectionGapsBounds(const IntRect& bounds)
{
m_blockSelectionGapsBounds.unite(bounds);
}
void RenderLayer::clearBlockSelectionGapsBounds()
{
m_blockSelectionGapsBounds = IntRect();
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
child->clearBlockSelectionGapsBounds();
}
void RenderLayer::repaintBlockSelectionGaps()
{
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
child->repaintBlockSelectionGaps();
if (m_blockSelectionGapsBounds.isEmpty())
return;
IntRect rect = m_blockSelectionGapsBounds;
rect.move(-scrolledContentOffset());
if (renderer()->hasOverflowClip())
rect.intersect(toRenderBox(renderer())->overflowClipRect(0, 0));
if (renderer()->hasClip())
rect.intersect(toRenderBox(renderer())->clipRect(0, 0));
if (!rect.isEmpty())
renderer()->repaintRectangle(rect);
}
bool RenderLayer::intersectsDamageRect(const IntRect& layerBounds, const IntRect& damageRect, const RenderLayer* rootLayer) const
{
// Always examine the canvas and the root.
// FIXME: Could eliminate the isRoot() check if we fix background painting so that the RenderView
// paints the root's background.
if (renderer()->isRenderView() || renderer()->isRoot())
return true;
// If we aren't an inline flow, and our layer bounds do intersect the damage rect, then we
// can go ahead and return true.
RenderView* view = renderer()->view();
ASSERT(view);
if (view && !renderer()->isRenderInline()) {
IntRect b = layerBounds;
b.inflate(view->maximalOutlineSize());
if (b.intersects(damageRect))
return true;
}
// Otherwise we need to compute the bounding box of this single layer and see if it intersects
// the damage rect.
return boundingBox(rootLayer).intersects(damageRect);
}
IntRect RenderLayer::localBoundingBox() const
{
// There are three special cases we need to consider.
// (1) Inline Flows. For inline flows we will create a bounding box that fully encompasses all of the lines occupied by the
// inline. In other words, if some <span> wraps to three lines, we'll create a bounding box that fully encloses the
// line boxes of all three lines (including overflow on those lines).
// (2) Left/Top Overflow. The width/height of layers already includes right/bottom overflow. However, in the case of left/top
// overflow, we have to create a bounding box that will extend to include this overflow.
// (3) Floats. When a layer has overhanging floats that it paints, we need to make sure to include these overhanging floats
// as part of our bounding box. We do this because we are the responsible layer for both hit testing and painting those
// floats.
IntRect result;
if (renderer()->isRenderInline())
result = toRenderInline(renderer())->linesVisualOverflowBoundingBox();
else if (renderer()->isTableRow()) {
// Our bounding box is just the union of all of our cells' border/overflow rects.
for (RenderObject* child = renderer()->firstChild(); child; child = child->nextSibling()) {
if (child->isTableCell()) {
IntRect bbox = toRenderBox(child)->borderBoxRect();
result.unite(bbox);
IntRect overflowRect = renderBox()->visualOverflowRect();
if (bbox != overflowRect)
result.unite(overflowRect);
}
}
} else {
RenderBox* box = renderBox();
ASSERT(box);
if (box->hasMask())
result = box->maskClipRect();
else {
IntRect bbox = box->borderBoxRect();
result = bbox;
IntRect overflowRect = box->visualOverflowRect();
if (bbox != overflowRect)
result.unite(overflowRect);
}
}
RenderView* view = renderer()->view();
ASSERT(view);
if (view)
result.inflate(view->maximalOutlineSize()); // Used to apply a fudge factor to dirty-rect checks on blocks/tables.
return result;
}
IntRect RenderLayer::boundingBox(const RenderLayer* ancestorLayer) const
{
IntRect result = localBoundingBox();
if (renderer()->isBox())
renderBox()->flipForWritingMode(result);
else
renderer()->containingBlock()->flipForWritingMode(result);
int deltaX = 0, deltaY = 0;
convertToLayerCoords(ancestorLayer, deltaX, deltaY);
result.move(deltaX, deltaY);
return result;
}
IntRect RenderLayer::absoluteBoundingBox() const
{
return boundingBox(root());
}
void RenderLayer::clearClipRectsIncludingDescendants()
{
if (!m_clipRects)
return;
clearClipRects();
for (RenderLayer* l = firstChild(); l; l = l->nextSibling())
l->clearClipRectsIncludingDescendants();
}
void RenderLayer::clearClipRects()
{
if (m_clipRects) {
m_clipRects->deref(renderer()->renderArena());
m_clipRects = 0;
#ifndef NDEBUG
m_clipRectsRoot = 0;
#endif
}
}
#if USE(ACCELERATED_COMPOSITING)
RenderLayerBacking* RenderLayer::ensureBacking()
{
if (!m_backing)
m_backing.set(new RenderLayerBacking(this));
return m_backing.get();
}
void RenderLayer::clearBacking()
{
m_backing.clear();
}
bool RenderLayer::hasCompositedMask() const
{
return m_backing && m_backing->hasMaskLayer();
}
GraphicsLayer* RenderLayer::layerForHorizontalScrollbar() const
{
return m_backing ? m_backing->layerForHorizontalScrollbar() : 0;
}
GraphicsLayer* RenderLayer::layerForVerticalScrollbar() const
{
return m_backing ? m_backing->layerForVerticalScrollbar() : 0;
}
GraphicsLayer* RenderLayer::layerForScrollCorner() const
{
return m_backing ? m_backing->layerForScrollCorner() : 0;
}
#endif
bool RenderLayer::paintsWithTransform(PaintBehavior paintBehavior) const
{
#if USE(ACCELERATED_COMPOSITING)
bool paintsToWindow = !isComposited() || backing()->paintingGoesToWindow();
#else
bool paintsToWindow = true;
#endif
return transform() && ((paintBehavior & PaintBehaviorFlattenCompositingLayers) || paintsToWindow);
}
void RenderLayer::setParent(RenderLayer* parent)
{
if (parent == m_parent)
return;
#if USE(ACCELERATED_COMPOSITING)
if (m_parent && !renderer()->documentBeingDestroyed())
compositor()->layerWillBeRemoved(m_parent, this);
#endif
m_parent = parent;
#if USE(ACCELERATED_COMPOSITING)
if (m_parent && !renderer()->documentBeingDestroyed())
compositor()->layerWasAdded(m_parent, this);
#endif
}
static RenderObject* commonAncestor(RenderObject* obj1, RenderObject* obj2)
{
if (!obj1 || !obj2)
return 0;
for (RenderObject* currObj1 = obj1; currObj1; currObj1 = currObj1->hoverAncestor())
for (RenderObject* currObj2 = obj2; currObj2; currObj2 = currObj2->hoverAncestor())
if (currObj1 == currObj2)
return currObj1;
return 0;
}
void RenderLayer::updateHoverActiveState(const HitTestRequest& request, HitTestResult& result)
{
// We don't update :hover/:active state when the result is marked as readOnly.
if (request.readOnly())
return;
Document* doc = renderer()->document();
Node* activeNode = doc->activeNode();
if (activeNode && !request.active()) {
// We are clearing the :active chain because the mouse has been released.
for (RenderObject* curr = activeNode->renderer(); curr; curr = curr->parent()) {
if (curr->node() && !curr->isText())
curr->node()->clearInActiveChain();
}
doc->setActiveNode(0);
} else {
Node* newActiveNode = result.innerNode();
if (!activeNode && newActiveNode && request.active()) {
// We are setting the :active chain and freezing it. If future moves happen, they
// will need to reference this chain.
for (RenderObject* curr = newActiveNode->renderer(); curr; curr = curr->parent()) {
if (curr->node() && !curr->isText()) {
curr->node()->setInActiveChain();
}
}
doc->setActiveNode(newActiveNode);
}
}
// If the mouse is down and if this is a mouse move event, we want to restrict changes in
// :hover/:active to only apply to elements that are in the :active chain that we froze
// at the time the mouse went down.
bool mustBeInActiveChain = request.active() && request.mouseMove();
// Check to see if the hovered node has changed. If not, then we don't need to
// do anything.
RefPtr<Node> oldHoverNode = doc->hoverNode();
Node* newHoverNode = result.innerNode();
// Update our current hover node.
doc->setHoverNode(newHoverNode);
// We have two different objects. Fetch their renderers.
RenderObject* oldHoverObj = oldHoverNode ? oldHoverNode->renderer() : 0;
RenderObject* newHoverObj = newHoverNode ? newHoverNode->renderer() : 0;
// Locate the common ancestor render object for the two renderers.
RenderObject* ancestor = commonAncestor(oldHoverObj, newHoverObj);
Vector<RefPtr<Node>, 32> nodesToRemoveFromChain;
Vector<RefPtr<Node>, 32> nodesToAddToChain;
if (oldHoverObj != newHoverObj) {
// The old hover path only needs to be cleared up to (and not including) the common ancestor;
for (RenderObject* curr = oldHoverObj; curr && curr != ancestor; curr = curr->hoverAncestor()) {
if (curr->node() && !curr->isText() && (!mustBeInActiveChain || curr->node()->inActiveChain()))
nodesToRemoveFromChain.append(curr->node());
}
}
// Now set the hover state for our new object up to the root.
for (RenderObject* curr = newHoverObj; curr; curr = curr->hoverAncestor()) {
if (curr->node() && !curr->isText() && (!mustBeInActiveChain || curr->node()->inActiveChain()))
nodesToAddToChain.append(curr->node());
}
size_t removeCount = nodesToRemoveFromChain.size();
for (size_t i = 0; i < removeCount; ++i) {
nodesToRemoveFromChain[i]->setActive(false);
nodesToRemoveFromChain[i]->setHovered(false);
}
size_t addCount = nodesToAddToChain.size();
for (size_t i = 0; i < addCount; ++i) {
nodesToAddToChain[i]->setActive(request.active());
nodesToAddToChain[i]->setHovered(true);
}
}
// Helper for the sorting of layers by z-index.
static inline bool compareZIndex(RenderLayer* first, RenderLayer* second)
{
return first->zIndex() < second->zIndex();
}
void RenderLayer::dirtyZOrderLists()
{
if (m_posZOrderList)
m_posZOrderList->clear();
if (m_negZOrderList)
m_negZOrderList->clear();
m_zOrderListsDirty = true;
#if USE(ACCELERATED_COMPOSITING)
if (!renderer()->documentBeingDestroyed())
compositor()->setCompositingLayersNeedRebuild();
#endif
}
void RenderLayer::dirtyStackingContextZOrderLists()
{
RenderLayer* sc = stackingContext();
if (sc)
sc->dirtyZOrderLists();
}
void RenderLayer::dirtyNormalFlowList()
{
if (m_normalFlowList)
m_normalFlowList->clear();
m_normalFlowListDirty = true;
#if USE(ACCELERATED_COMPOSITING)
if (!renderer()->documentBeingDestroyed())
compositor()->setCompositingLayersNeedRebuild();
#endif
}
void RenderLayer::updateZOrderLists()
{
if (!isStackingContext() || !m_zOrderListsDirty)
return;
for (RenderLayer* child = firstChild(); child; child = child->nextSibling())
if (!m_reflection || reflectionLayer() != child)
child->collectLayers(m_posZOrderList, m_negZOrderList);
// Sort the two lists.
if (m_posZOrderList)
std::stable_sort(m_posZOrderList->begin(), m_posZOrderList->end(), compareZIndex);
if (m_negZOrderList)
std::stable_sort(m_negZOrderList->begin(), m_negZOrderList->end(), compareZIndex);
m_zOrderListsDirty = false;
}
void RenderLayer::updateNormalFlowList()
{
if (!m_normalFlowListDirty)
return;
for (RenderLayer* child = firstChild(); child; child = child->nextSibling()) {
// Ignore non-overflow layers and reflections.
if (child->isNormalFlowOnly() && (!m_reflection || reflectionLayer() != child)) {
if (!m_normalFlowList)
m_normalFlowList = new Vector<RenderLayer*>;
m_normalFlowList->append(child);
}
}
m_normalFlowListDirty = false;
}
void RenderLayer::collectLayers(Vector<RenderLayer*>*& posBuffer, Vector<RenderLayer*>*& negBuffer)
{
updateVisibilityStatus();
// Overflow layers are just painted by their enclosing layers, so they don't get put in zorder lists.
if ((m_hasVisibleContent || (m_hasVisibleDescendant && isStackingContext())) && !isNormalFlowOnly()) {
// Determine which buffer the child should be in.
Vector<RenderLayer*>*& buffer = (zIndex() >= 0) ? posBuffer : negBuffer;
// Create the buffer if it doesn't exist yet.
if (!buffer)
buffer = new Vector<RenderLayer*>;
// Append ourselves at the end of the appropriate buffer.
buffer->append(this);
}
// Recur into our children to collect more layers, but only if we don't establish
// a stacking context.
if (m_hasVisibleDescendant && !isStackingContext()) {
for (RenderLayer* child = firstChild(); child; child = child->nextSibling()) {
// Ignore reflections.
if (!m_reflection || reflectionLayer() != child)
child->collectLayers(posBuffer, negBuffer);
}
}
}
void RenderLayer::updateLayerListsIfNeeded()
{
updateZOrderLists();
updateNormalFlowList();
}
void RenderLayer::updateCompositingAndLayerListsIfNeeded()
{
#if USE(ACCELERATED_COMPOSITING)
if (compositor()->inCompositingMode()) {
if ((isStackingContext() && m_zOrderListsDirty) || m_normalFlowListDirty)
compositor()->updateCompositingLayers(CompositingUpdateOnPaitingOrHitTest, this);
return;
}
#endif
updateLayerListsIfNeeded();
}
void RenderLayer::repaintIncludingDescendants()
{
renderer()->repaint();
for (RenderLayer* curr = firstChild(); curr; curr = curr->nextSibling())
curr->repaintIncludingDescendants();
}
#if USE(ACCELERATED_COMPOSITING)
void RenderLayer::setBackingNeedsRepaint()
{
ASSERT(isComposited());
if (backing()->paintingGoesToWindow()) {
// If we're trying to repaint the placeholder document layer, propagate the
// repaint to the native view system.
RenderView* view = renderer()->view();
if (view)
view->repaintViewRectangle(absoluteBoundingBox());
} else
backing()->setContentsNeedDisplay();
}
void RenderLayer::setBackingNeedsRepaintInRect(const IntRect& r)
{
ASSERT(isComposited());
if (backing()->paintingGoesToWindow()) {
// If we're trying to repaint the placeholder document layer, propagate the
// repaint to the native view system.
IntRect absRect(r);
int x = 0;
int y = 0;
convertToLayerCoords(root(), x, y);
absRect.move(x, y);
RenderView* view = renderer()->view();
if (view)
view->repaintViewRectangle(absRect);
} else
backing()->setContentsNeedDisplayInRect(r);
}
// Since we're only painting non-composited layers, we know that they all share the same repaintContainer.
void RenderLayer::repaintIncludingNonCompositingDescendants(RenderBoxModelObject* repaintContainer)
{
renderer()->repaintUsingContainer(repaintContainer, renderer()->clippedOverflowRectForRepaint(repaintContainer));
for (RenderLayer* curr = firstChild(); curr; curr = curr->nextSibling()) {
if (!curr->isComposited())
curr->repaintIncludingNonCompositingDescendants(repaintContainer);
}
}
#endif
bool RenderLayer::shouldBeNormalFlowOnly() const
{
return (renderer()->hasOverflowClip()
|| renderer()->hasReflection()
|| renderer()->hasMask()
|| renderer()->isVideo()
|| renderer()->isEmbeddedObject()
|| renderer()->isApplet()
|| renderer()->isRenderIFrame()
|| renderer()->style()->specifiesColumns())
&& !renderer()->isPositioned()
&& !renderer()->isRelPositioned()
&& !renderer()->hasTransform()
&& !isTransparent();
}
bool RenderLayer::isSelfPaintingLayer() const
{
#if ENABLE(ANDROID_OVERFLOW_SCROLL)
if (hasOverflowScroll())
return true;
#endif
return !isNormalFlowOnly()
|| renderer()->hasReflection()
|| renderer()->hasMask()
|| renderer()->isTableRow()
|| renderer()->isVideo()
|| renderer()->isEmbeddedObject()
|| renderer()->isApplet()
|| renderer()->isRenderIFrame();
}
void RenderLayer::styleChanged(StyleDifference diff, const RenderStyle* oldStyle)
{
bool isNormalFlowOnly = shouldBeNormalFlowOnly();
if (isNormalFlowOnly != m_isNormalFlowOnly) {
m_isNormalFlowOnly = isNormalFlowOnly;
RenderLayer* p = parent();
if (p)
p->dirtyNormalFlowList();
dirtyStackingContextZOrderLists();
}
if (renderer()->style()->overflowX() == OMARQUEE && renderer()->style()->marqueeBehavior() != MNONE && renderer()->isBox()) {
if (!m_marquee)
m_marquee = new RenderMarquee(this);
m_marquee->updateMarqueeStyle();
}
else if (m_marquee) {
delete m_marquee;
m_marquee = 0;
}
if (!hasReflection() && m_reflection)
removeReflection();
else if (hasReflection()) {
if (!m_reflection)
createReflection();
updateReflectionStyle();
}
// FIXME: Need to detect a swap from custom to native scrollbars (and vice versa).
if (m_hBar)
m_hBar->styleChanged();
if (m_vBar)
m_vBar->styleChanged();
updateScrollCornerStyle();
updateResizerStyle();
#if USE(ACCELERATED_COMPOSITING)
updateTransform();
if (compositor()->updateLayerCompositingState(this))
compositor()->setCompositingLayersNeedRebuild();
else if (m_backing)
m_backing->updateGraphicsLayerGeometry();
else if (oldStyle && oldStyle->overflowX() != renderer()->style()->overflowX()) {
if (stackingContext()->hasCompositingDescendant())
compositor()->setCompositingLayersNeedRebuild();
}
if (m_backing && diff >= StyleDifferenceRepaint)
m_backing->setContentsNeedDisplay();
#else
UNUSED_PARAM(diff);
#endif
}
void RenderLayer::updateScrollCornerStyle()
{
RenderObject* actualRenderer = renderer()->node() ? renderer()->node()->shadowAncestorNode()->renderer() : renderer();
RefPtr<RenderStyle> corner = renderer()->hasOverflowClip() ? actualRenderer->getUncachedPseudoStyle(SCROLLBAR_CORNER, actualRenderer->style()) : 0;
if (corner) {
if (!m_scrollCorner) {
m_scrollCorner = new (renderer()->renderArena()) RenderScrollbarPart(renderer()->document());
m_scrollCorner->setParent(renderer());
}
m_scrollCorner->setStyle(corner.release());
} else if (m_scrollCorner) {
m_scrollCorner->destroy();
m_scrollCorner = 0;
}
}
void RenderLayer::updateResizerStyle()
{
RenderObject* actualRenderer = renderer()->node() ? renderer()->node()->shadowAncestorNode()->renderer() : renderer();
RefPtr<RenderStyle> resizer = renderer()->hasOverflowClip() ? actualRenderer->getUncachedPseudoStyle(RESIZER, actualRenderer->style()) : 0;
if (resizer) {
if (!m_resizer) {
m_resizer = new (renderer()->renderArena()) RenderScrollbarPart(renderer()->document());
m_resizer->setParent(renderer());
}
m_resizer->setStyle(resizer.release());
} else if (m_resizer) {
m_resizer->destroy();
m_resizer = 0;
}
}
RenderLayer* RenderLayer::reflectionLayer() const
{
return m_reflection ? m_reflection->layer() : 0;
}
void RenderLayer::createReflection()
{
ASSERT(!m_reflection);
m_reflection = new (renderer()->renderArena()) RenderReplica(renderer()->document());
m_reflection->setParent(renderer()); // We create a 1-way connection.
}
void RenderLayer::removeReflection()
{
if (!m_reflection->documentBeingDestroyed())
m_reflection->removeLayers(this);
m_reflection->setParent(0);
m_reflection->destroy();
m_reflection = 0;
}
void RenderLayer::updateReflectionStyle()
{
RefPtr<RenderStyle> newStyle = RenderStyle::create();
newStyle->inheritFrom(renderer()->style());
// Map in our transform.
TransformOperations transform;
switch (renderer()->style()->boxReflect()->direction()) {
case ReflectionBelow:
transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed), Length(100., Percent), TransformOperation::TRANSLATE));
transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed), renderer()->style()->boxReflect()->offset(), TransformOperation::TRANSLATE));
transform.operations().append(ScaleTransformOperation::create(1.0, -1.0, ScaleTransformOperation::SCALE));
break;
case ReflectionAbove:
transform.operations().append(ScaleTransformOperation::create(1.0, -1.0, ScaleTransformOperation::SCALE));
transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed), Length(100., Percent), TransformOperation::TRANSLATE));
transform.operations().append(TranslateTransformOperation::create(Length(0, Fixed), renderer()->style()->boxReflect()->offset(), TransformOperation::TRANSLATE));
break;
case ReflectionRight:
transform.operations().append(TranslateTransformOperation::create(Length(100., Percent), Length(0, Fixed), TransformOperation::TRANSLATE));
transform.operations().append(TranslateTransformOperation::create(renderer()->style()->boxReflect()->offset(), Length(0, Fixed), TransformOperation::TRANSLATE));
transform.operations().append(ScaleTransformOperation::create(-1.0, 1.0, ScaleTransformOperation::SCALE));
break;
case ReflectionLeft:
transform.operations().append(ScaleTransformOperation::create(-1.0, 1.0, ScaleTransformOperation::SCALE));
transform.operations().append(TranslateTransformOperation::create(Length(100., Percent), Length(0, Fixed), TransformOperation::TRANSLATE));
transform.operations().append(TranslateTransformOperation::create(renderer()->style()->boxReflect()->offset(), Length(0, Fixed), TransformOperation::TRANSLATE));
break;
}
newStyle->setTransform(transform);
// Map in our mask.
newStyle->setMaskBoxImage(renderer()->style()->boxReflect()->mask());
m_reflection->setStyle(newStyle.release());
}
void RenderLayer::updateContentsScale(float scale)
{
#if USE(ACCELERATED_COMPOSITING)
if (m_backing)
m_backing->updateContentsScale(scale);
#endif
}
} // namespace WebCore
#ifndef NDEBUG
void showLayerTree(const WebCore::RenderLayer* layer)
{
if (!layer)
return;
if (WebCore::Frame* frame = layer->renderer()->frame()) {
WTF::String output = externalRepresentation(frame, WebCore::RenderAsTextShowAllLayers | WebCore::RenderAsTextShowLayerNesting | WebCore::RenderAsTextShowCompositedLayers | WebCore::RenderAsTextShowAddresses | WebCore::RenderAsTextShowIDAndClass | WebCore::RenderAsTextDontUpdateLayout | WebCore::RenderAsTextShowLayoutState);
fprintf(stderr, "%s\n", output.utf8().data());
}
}
void showLayerTree(const WebCore::RenderObject* renderer)
{
if (!renderer)
return;
showLayerTree(renderer->enclosingLayer());
}
#endif
|