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
|
/*
* Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
* Copyright (C) 2006 Alexey Proskuryakov (ap@webkit.org)
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "EventHandler.h"
#include "AXObjectCache.h"
#include "CachedImage.h"
#include "ChromeClient.h"
#include "Cursor.h"
#include "Document.h"
#include "DragController.h"
#include "Editor.h"
#include "EventNames.h"
#include "FloatPoint.h"
#include "FloatRect.h"
#include "FocusController.h"
#include "Frame.h"
#include "FrameLoader.h"
#include "FrameTree.h"
#include "FrameView.h"
#include "HTMLFrameElementBase.h"
#include "HTMLFrameSetElement.h"
#include "HTMLInputElement.h"
#include "HTMLNames.h"
#include "HitTestRequest.h"
#include "HitTestResult.h"
#include "Image.h"
#include "InspectorController.h"
#include "KeyboardEvent.h"
#include "MouseEvent.h"
#include "MouseEventWithHitTestResults.h"
#include "Page.h"
#include "PlatformKeyboardEvent.h"
#include "PlatformWheelEvent.h"
#include "PluginView.h"
#include "RenderFrameSet.h"
#include "RenderTextControlSingleLine.h"
#include "RenderView.h"
#include "RenderWidget.h"
#include "Scrollbar.h"
#include "SelectionController.h"
#include "Settings.h"
#include "TextEvent.h"
#include "htmlediting.h" // for comparePositions()
#include <wtf/StdLibExtras.h>
#if ENABLE(SVG)
#include "SVGDocument.h"
#include "SVGElementInstance.h"
#include "SVGNames.h"
#include "SVGUseElement.h"
#endif
#if ENABLE(TOUCH_EVENTS)
#include "PlatformTouchEvent.h"
#include "TouchEvent.h"
#endif
#if defined(ANDROID_PLUGINS)
#include "WebViewCore.h"
#endif
namespace WebCore {
using namespace HTMLNames;
#if ENABLE(DRAG_SUPPORT)
// The link drag hysteresis is much larger than the others because there
// needs to be enough space to cancel the link press without starting a link drag,
// and because dragging links is rare.
const int LinkDragHysteresis = 40;
const int ImageDragHysteresis = 5;
const int TextDragHysteresis = 3;
const int GeneralDragHysteresis = 3;
#endif // ENABLE(DRAG_SUPPORT)
// Match key code of composition keydown event on windows.
// IE sends VK_PROCESSKEY which has value 229;
const int CompositionEventKeyCode = 229;
#if ENABLE(SVG)
using namespace SVGNames;
#endif
// When the autoscroll or the panScroll is triggered when do the scroll every 0.05s to make it smooth
const double autoscrollInterval = 0.05;
static Frame* subframeForHitTestResult(const MouseEventWithHitTestResults&);
static inline void scrollAndAcceptEvent(float delta, ScrollDirection positiveDirection, ScrollDirection negativeDirection, PlatformWheelEvent& e, Node* node, Node** stopNode)
{
if (!delta)
return;
// Find the nearest enclosing box.
RenderBox* enclosingBox = node->renderer()->enclosingBox();
if (e.granularity() == ScrollByPageWheelEvent) {
if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPage, 1, stopNode))
e.accept();
return;
}
float pixelsToScroll = delta > 0 ? delta : -delta;
if (enclosingBox->scroll(delta < 0 ? negativeDirection : positiveDirection, ScrollByPixel, pixelsToScroll, stopNode))
e.accept();
}
#if !PLATFORM(MAC)
inline bool EventHandler::eventLoopHandleMouseUp(const MouseEventWithHitTestResults&)
{
return false;
}
#if ENABLE(DRAG_SUPPORT)
inline bool EventHandler::eventLoopHandleMouseDragged(const MouseEventWithHitTestResults&)
{
return false;
}
#endif
#endif
EventHandler::EventHandler(Frame* frame)
: m_frame(frame)
, m_mousePressed(false)
, m_capturesDragging(false)
, m_mouseDownMayStartSelect(false)
#if ENABLE(DRAG_SUPPORT)
, m_mouseDownMayStartDrag(false)
#endif
, m_mouseDownWasSingleClickInSelection(false)
, m_beganSelectingText(false)
, m_panScrollInProgress(false)
, m_panScrollButtonPressed(false)
, m_springLoadedPanScrollInProgress(false)
, m_hoverTimer(this, &EventHandler::hoverTimerFired)
, m_autoscrollTimer(this, &EventHandler::autoscrollTimerFired)
, m_autoscrollRenderer(0)
, m_autoscrollInProgress(false)
, m_mouseDownMayStartAutoscroll(false)
, m_mouseDownWasInSubframe(false)
#if ENABLE(SVG)
, m_svgPan(false)
#endif
, m_resizeLayer(0)
, m_capturingMouseEventsNode(0)
, m_clickCount(0)
, m_mouseDownTimestamp(0)
, m_useLatchedWheelEventNode(false)
, m_widgetIsLatched(false)
#if PLATFORM(MAC)
, m_mouseDownView(nil)
, m_sendingEventToSubview(false)
, m_activationEventNumber(0)
#endif
{
}
EventHandler::~EventHandler()
{
}
#if ENABLE(DRAG_SUPPORT)
EventHandler::EventHandlerDragState& EventHandler::dragState()
{
DEFINE_STATIC_LOCAL(EventHandlerDragState, state, ());
return state;
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::clear()
{
m_hoverTimer.stop();
m_resizeLayer = 0;
m_nodeUnderMouse = 0;
m_lastNodeUnderMouse = 0;
#if ENABLE(SVG)
m_instanceUnderMouse = 0;
m_lastInstanceUnderMouse = 0;
#endif
m_lastMouseMoveEventSubframe = 0;
m_lastScrollbarUnderMouse = 0;
m_clickCount = 0;
m_clickNode = 0;
#if ENABLE(TOUCH_EVENTS)
m_touchEventTarget = 0;
#endif
m_frameSetBeingResized = 0;
#if ENABLE(DRAG_SUPPORT)
m_dragTarget = 0;
m_shouldOnlyFireDragOverEvent = false;
#endif
m_currentMousePosition = IntPoint();
m_mousePressNode = 0;
m_mousePressed = false;
m_capturesDragging = false;
m_capturingMouseEventsNode = 0;
m_latchedWheelEventNode = 0;
m_previousWheelScrolledNode = 0;
}
void EventHandler::selectClosestWordFromMouseEvent(const MouseEventWithHitTestResults& result)
{
Node* innerNode = result.targetNode();
VisibleSelection newSelection;
if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
if (pos.isNotNull()) {
newSelection = VisibleSelection(pos);
newSelection.expandUsingGranularity(WordGranularity);
}
if (newSelection.isRange()) {
m_frame->setSelectionGranularity(WordGranularity);
m_beganSelectingText = true;
if (result.event().clickCount() == 2 && m_frame->editor()->isSelectTrailingWhitespaceEnabled())
newSelection.appendTrailingWhitespace();
}
if (m_frame->shouldChangeSelection(newSelection))
m_frame->selection()->setSelection(newSelection);
}
}
void EventHandler::selectClosestWordOrLinkFromMouseEvent(const MouseEventWithHitTestResults& result)
{
if (!result.hitTestResult().isLiveLink())
return selectClosestWordFromMouseEvent(result);
Node* innerNode = result.targetNode();
if (innerNode && innerNode->renderer() && m_mouseDownMayStartSelect) {
VisibleSelection newSelection;
Element* URLElement = result.hitTestResult().URLElement();
VisiblePosition pos(innerNode->renderer()->positionForPoint(result.localPoint()));
if (pos.isNotNull() && pos.deepEquivalent().node()->isDescendantOf(URLElement))
newSelection = VisibleSelection::selectionFromContentsOfNode(URLElement);
if (newSelection.isRange()) {
m_frame->setSelectionGranularity(WordGranularity);
m_beganSelectingText = true;
}
if (m_frame->shouldChangeSelection(newSelection))
m_frame->selection()->setSelection(newSelection);
}
}
bool EventHandler::handleMousePressEventDoubleClick(const MouseEventWithHitTestResults& event)
{
if (event.event().button() != LeftButton)
return false;
if (m_frame->selection()->isRange())
// A double-click when range is already selected
// should not change the selection. So, do not call
// selectClosestWordFromMouseEvent, but do set
// m_beganSelectingText to prevent handleMouseReleaseEvent
// from setting caret selection.
m_beganSelectingText = true;
else
selectClosestWordFromMouseEvent(event);
return true;
}
bool EventHandler::handleMousePressEventTripleClick(const MouseEventWithHitTestResults& event)
{
if (event.event().button() != LeftButton)
return false;
Node* innerNode = event.targetNode();
if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
return false;
VisibleSelection newSelection;
VisiblePosition pos(innerNode->renderer()->positionForPoint(event.localPoint()));
if (pos.isNotNull()) {
newSelection = VisibleSelection(pos);
newSelection.expandUsingGranularity(ParagraphGranularity);
}
if (newSelection.isRange()) {
m_frame->setSelectionGranularity(ParagraphGranularity);
m_beganSelectingText = true;
}
if (m_frame->shouldChangeSelection(newSelection))
m_frame->selection()->setSelection(newSelection);
return true;
}
bool EventHandler::handleMousePressEventSingleClick(const MouseEventWithHitTestResults& event)
{
Node* innerNode = event.targetNode();
if (!(innerNode && innerNode->renderer() && m_mouseDownMayStartSelect))
return false;
// Extend the selection if the Shift key is down, unless the click is in a link.
bool extendSelection = event.event().shiftKey() && !event.isOverLink();
// Don't restart the selection when the mouse is pressed on an
// existing selection so we can allow for text dragging.
if (FrameView* view = m_frame->view()) {
IntPoint vPoint = view->windowToContents(event.event().pos());
if (!extendSelection && m_frame->selection()->contains(vPoint)) {
m_mouseDownWasSingleClickInSelection = true;
return false;
}
}
VisiblePosition visiblePos(innerNode->renderer()->positionForPoint(event.localPoint()));
if (visiblePos.isNull())
visiblePos = VisiblePosition(innerNode, 0, DOWNSTREAM);
Position pos = visiblePos.deepEquivalent();
VisibleSelection newSelection = m_frame->selection()->selection();
if (extendSelection && newSelection.isCaretOrRange()) {
m_frame->selection()->setLastChangeWasHorizontalExtension(false);
// See <rdar://problem/3668157> REGRESSION (Mail): shift-click deselects when selection
// was created right-to-left
Position start = newSelection.start();
Position end = newSelection.end();
if (comparePositions(pos, start) <= 0)
newSelection = VisibleSelection(pos, end);
else
newSelection = VisibleSelection(start, pos);
if (m_frame->selectionGranularity() != CharacterGranularity)
newSelection.expandUsingGranularity(m_frame->selectionGranularity());
m_beganSelectingText = true;
} else {
newSelection = VisibleSelection(visiblePos);
m_frame->setSelectionGranularity(CharacterGranularity);
}
if (m_frame->shouldChangeSelection(newSelection))
m_frame->selection()->setSelection(newSelection);
return true;
}
bool EventHandler::handleMousePressEvent(const MouseEventWithHitTestResults& event)
{
#if ENABLE(DRAG_SUPPORT)
// Reset drag state.
dragState().m_dragSrc = 0;
#endif
if (ScrollView* scrollView = m_frame->view()) {
if (scrollView->isPointInScrollbarCorner(event.event().pos()))
return false;
}
bool singleClick = event.event().clickCount() <= 1;
// If we got the event back, that must mean it wasn't prevented,
// so it's allowed to start a drag or selection.
m_mouseDownMayStartSelect = canMouseDownStartSelect(event.targetNode());
#if ENABLE(DRAG_SUPPORT)
// Careful that the drag starting logic stays in sync with eventMayStartDrag()
m_mouseDownMayStartDrag = singleClick;
#endif
m_mouseDownWasSingleClickInSelection = false;
m_mouseDown = event.event();
if (event.isOverWidget() && passWidgetMouseDownEventToWidget(event))
return true;
#if ENABLE(SVG)
if (m_frame->document()->isSVGDocument() &&
static_cast<SVGDocument*>(m_frame->document())->zoomAndPanEnabled()) {
if (event.event().shiftKey() && singleClick) {
m_svgPan = true;
static_cast<SVGDocument*>(m_frame->document())->startPan(event.event().pos());
return true;
}
}
#endif
// We don't do this at the start of mouse down handling,
// because we don't want to do it until we know we didn't hit a widget.
if (singleClick)
focusDocumentView();
Node* innerNode = event.targetNode();
m_mousePressNode = innerNode;
#if ENABLE(DRAG_SUPPORT)
m_dragStartPos = event.event().pos();
#endif
bool swallowEvent = false;
m_frame->selection()->setCaretBlinkingSuspended(true);
m_mousePressed = true;
m_beganSelectingText = false;
if (event.event().clickCount() == 2)
swallowEvent = handleMousePressEventDoubleClick(event);
else if (event.event().clickCount() >= 3)
swallowEvent = handleMousePressEventTripleClick(event);
else
swallowEvent = handleMousePressEventSingleClick(event);
m_mouseDownMayStartAutoscroll = m_mouseDownMayStartSelect ||
(m_mousePressNode && m_mousePressNode->renderBox() && m_mousePressNode->renderBox()->canBeProgramaticallyScrolled(true));
return swallowEvent;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::handleMouseDraggedEvent(const MouseEventWithHitTestResults& event)
{
if (handleDrag(event))
return true;
if (!m_mousePressed)
return false;
Node* targetNode = event.targetNode();
if (event.event().button() != LeftButton || !targetNode || !targetNode->renderer())
return false;
#if PLATFORM(MAC) // FIXME: Why does this assertion fire on other platforms?
ASSERT(m_mouseDownMayStartSelect || m_mouseDownMayStartAutoscroll);
#endif
m_mouseDownMayStartDrag = false;
if (m_mouseDownMayStartAutoscroll && !m_panScrollInProgress) {
// If the selection is contained in a layer that can scroll, that layer should handle the autoscroll
// Otherwise, let the bridge handle it so the view can scroll itself.
RenderObject* renderer = targetNode->renderer();
while (renderer && (!renderer->isBox() || !toRenderBox(renderer)->canBeScrolledAndHasScrollableArea())) {
if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement())
renderer = renderer->document()->ownerElement()->renderer();
else
renderer = renderer->parent();
}
if (renderer) {
m_autoscrollInProgress = true;
handleAutoscroll(renderer);
}
m_mouseDownMayStartAutoscroll = false;
}
updateSelectionForMouseDrag(targetNode, event.localPoint());
return true;
}
bool EventHandler::eventMayStartDrag(const PlatformMouseEvent& event) const
{
// This is a pre-flight check of whether the event might lead to a drag being started. Be careful
// that its logic needs to stay in sync with handleMouseMoveEvent() and the way we setMouseDownMayStartDrag
// in handleMousePressEvent
if (!m_frame->contentRenderer() || !m_frame->contentRenderer()->hasLayer())
return false;
if (event.button() != LeftButton || event.clickCount() != 1)
return false;
bool DHTMLFlag;
bool UAFlag;
allowDHTMLDrag(DHTMLFlag, UAFlag);
if (!DHTMLFlag && !UAFlag)
return false;
FrameView* view = m_frame->view();
if (!view)
return false;
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(view->windowToContents(event.pos()));
m_frame->contentRenderer()->layer()->hitTest(request, result);
bool srcIsDHTML;
return result.innerNode() && result.innerNode()->renderer()->draggableNode(DHTMLFlag, UAFlag, result.point().x(), result.point().y(), srcIsDHTML);
}
void EventHandler::updateSelectionForMouseDrag()
{
FrameView* view = m_frame->view();
if (!view)
return;
RenderView* renderer = m_frame->contentRenderer();
if (!renderer)
return;
RenderLayer* layer = renderer->layer();
if (!layer)
return;
HitTestRequest request(HitTestRequest::ReadOnly |
HitTestRequest::Active |
HitTestRequest::MouseMove);
HitTestResult result(view->windowToContents(m_currentMousePosition));
layer->hitTest(request, result);
updateSelectionForMouseDrag(result.innerNode(), result.localPoint());
}
void EventHandler::updateSelectionForMouseDrag(Node* targetNode, const IntPoint& localPoint)
{
if (!m_mouseDownMayStartSelect)
return;
if (!targetNode)
return;
RenderObject* targetRenderer = targetNode->renderer();
if (!targetRenderer)
return;
if (!canMouseDragExtendSelect(targetNode))
return;
VisiblePosition targetPosition(targetRenderer->positionForPoint(localPoint));
// Don't modify the selection if we're not on a node.
if (targetPosition.isNull())
return;
// Restart the selection if this is the first mouse move. This work is usually
// done in handleMousePressEvent, but not if the mouse press was on an existing selection.
VisibleSelection newSelection = m_frame->selection()->selection();
#if ENABLE(SVG)
// Special case to limit selection to the containing block for SVG text.
// FIXME: Isn't there a better non-SVG-specific way to do this?
if (Node* selectionBaseNode = newSelection.base().node())
if (RenderObject* selectionBaseRenderer = selectionBaseNode->renderer())
if (selectionBaseRenderer->isSVGText())
if (targetNode->renderer()->containingBlock() != selectionBaseRenderer->containingBlock())
return;
#endif
if (!m_beganSelectingText) {
m_beganSelectingText = true;
newSelection = VisibleSelection(targetPosition);
}
newSelection.setExtent(targetPosition);
if (m_frame->selectionGranularity() != CharacterGranularity)
newSelection.expandUsingGranularity(m_frame->selectionGranularity());
if (m_frame->shouldChangeSelection(newSelection)) {
m_frame->selection()->setLastChangeWasHorizontalExtension(false);
m_frame->selection()->setSelection(newSelection);
}
}
#endif // ENABLE(DRAG_SUPPORT)
bool EventHandler::handleMouseUp(const MouseEventWithHitTestResults& event)
{
if (eventLoopHandleMouseUp(event))
return true;
// If this was the first click in the window, we don't even want to clear the selection.
// This case occurs when the user clicks on a draggable element, since we have to process
// the mouse down and drag events to see if we might start a drag. For other first clicks
// in a window, we just don't acceptFirstMouse, and the whole down-drag-up sequence gets
// ignored upstream of this layer.
return eventActivatedView(event.event());
}
bool EventHandler::handleMouseReleaseEvent(const MouseEventWithHitTestResults& event)
{
if (m_autoscrollInProgress)
stopAutoscrollTimer();
if (handleMouseUp(event))
return true;
// Used to prevent mouseMoveEvent from initiating a drag before
// the mouse is pressed again.
m_frame->selection()->setCaretBlinkingSuspended(false);
m_mousePressed = false;
m_capturesDragging = false;
#if ENABLE(DRAG_SUPPORT)
m_mouseDownMayStartDrag = false;
#endif
m_mouseDownMayStartSelect = false;
m_mouseDownMayStartAutoscroll = false;
m_mouseDownWasInSubframe = false;
bool handled = false;
// Clear the selection if the mouse didn't move after the last mouse
// press and it's not a context menu click. We do this so when clicking
// on the selection, the selection goes away. However, if we are
// editing, place the caret.
if (m_mouseDownWasSingleClickInSelection && !m_beganSelectingText
#if ENABLE(DRAG_SUPPORT)
&& m_dragStartPos == event.event().pos()
#endif
&& m_frame->selection()->isRange()
&& event.event().button() != RightButton) {
VisibleSelection newSelection;
Node *node = event.targetNode();
bool caretBrowsing = m_frame->settings()->caretBrowsingEnabled();
if (node && (caretBrowsing || node->isContentEditable()) && node->renderer()) {
VisiblePosition pos = node->renderer()->positionForPoint(event.localPoint());
newSelection = VisibleSelection(pos);
}
if (m_frame->shouldChangeSelection(newSelection))
m_frame->selection()->setSelection(newSelection);
handled = true;
}
m_frame->notifyRendererOfSelectionChange(true);
m_frame->selection()->selectFrameElementInParentIfFullySelected();
return handled;
}
void EventHandler::handleAutoscroll(RenderObject* renderer)
{
// We don't want to trigger the autoscroll or the panScroll if it's already active
if (m_autoscrollTimer.isActive())
return;
setAutoscrollRenderer(renderer);
#if ENABLE(PAN_SCROLLING)
if (m_panScrollInProgress) {
m_panScrollStartPos = currentMousePosition();
if (FrameView* view = m_frame->view())
view->addPanScrollIcon(m_panScrollStartPos);
// If we're not in the top frame we notify it that we doing a panScroll.
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame)
mainFrame->eventHandler()->setPanScrollInProgress(true);
}
}
#endif
startAutoscrollTimer();
}
void EventHandler::autoscrollTimerFired(Timer<EventHandler>*)
{
RenderObject* r = autoscrollRenderer();
if (!r || !r->isBox()) {
stopAutoscrollTimer();
return;
}
if (m_autoscrollInProgress) {
if (!m_mousePressed) {
stopAutoscrollTimer();
return;
}
toRenderBox(r)->autoscroll();
} else {
// we verify that the main frame hasn't received the order to stop the panScroll
if (Page* page = m_frame->page()) {
if (!page->mainFrame()->eventHandler()->panScrollInProgress()) {
stopAutoscrollTimer();
return;
}
}
#if ENABLE(PAN_SCROLLING)
updatePanScrollState();
toRenderBox(r)->panScroll(m_panScrollStartPos);
#endif
}
}
#if ENABLE(PAN_SCROLLING)
void EventHandler::updatePanScrollState()
{
FrameView* view = m_frame->view();
if (!view)
return;
// At the original click location we draw a 4 arrowed icon. Over this icon there won't be any scroll
// So we don't want to change the cursor over this area
bool east = m_panScrollStartPos.x() < (m_currentMousePosition.x() - ScrollView::noPanScrollRadius);
bool west = m_panScrollStartPos.x() > (m_currentMousePosition.x() + ScrollView::noPanScrollRadius);
bool north = m_panScrollStartPos.y() > (m_currentMousePosition.y() + ScrollView::noPanScrollRadius);
bool south = m_panScrollStartPos.y() < (m_currentMousePosition.y() - ScrollView::noPanScrollRadius);
if ((east || west || north || south) && m_panScrollButtonPressed)
m_springLoadedPanScrollInProgress = true;
if (north) {
if (east)
view->setCursor(northEastPanningCursor());
else if (west)
view->setCursor(northWestPanningCursor());
else
view->setCursor(northPanningCursor());
} else if (south) {
if (east)
view->setCursor(southEastPanningCursor());
else if (west)
view->setCursor(southWestPanningCursor());
else
view->setCursor(southPanningCursor());
} else if (east)
view->setCursor(eastPanningCursor());
else if (west)
view->setCursor(westPanningCursor());
else
view->setCursor(middlePanningCursor());
}
#endif // ENABLE(PAN_SCROLLING)
RenderObject* EventHandler::autoscrollRenderer() const
{
return m_autoscrollRenderer;
}
void EventHandler::updateAutoscrollRenderer()
{
if (!m_autoscrollRenderer)
return;
HitTestResult hitTest = hitTestResultAtPoint(m_panScrollStartPos, true);
if (Node* nodeAtPoint = hitTest.innerNode())
m_autoscrollRenderer = nodeAtPoint->renderer();
while (m_autoscrollRenderer && (!m_autoscrollRenderer->isBox() || !toRenderBox(m_autoscrollRenderer)->canBeScrolledAndHasScrollableArea()))
m_autoscrollRenderer = m_autoscrollRenderer->parent();
}
void EventHandler::setAutoscrollRenderer(RenderObject* renderer)
{
m_autoscrollRenderer = renderer;
}
#if ENABLE(DRAG_SUPPORT)
void EventHandler::allowDHTMLDrag(bool& flagDHTML, bool& flagUA) const
{
flagDHTML = false;
flagUA = false;
if (!m_frame)
return;
Page* page = m_frame->page();
if (!page)
return;
FrameView* view = m_frame->view();
if (!view)
return;
unsigned mask = page->dragController()->delegateDragSourceAction(view->contentsToWindow(m_mouseDownPos));
flagDHTML = (mask & DragSourceActionDHTML) != DragSourceActionNone;
flagUA = ((mask & DragSourceActionImage) || (mask & DragSourceActionLink) || (mask & DragSourceActionSelection));
}
#endif // ENABLE(DRAG_SUPPORT)
HitTestResult EventHandler::hitTestResultAtPoint(const IntPoint& point, bool allowShadowContent, bool ignoreClipping, HitTestScrollbars testScrollbars)
{
HitTestResult result(point);
if (!m_frame->contentRenderer())
return result;
int hitType = HitTestRequest::ReadOnly | HitTestRequest::Active;
if (ignoreClipping)
hitType |= HitTestRequest::IgnoreClipping;
m_frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), result);
while (true) {
Node* n = result.innerNode();
if (!result.isOverWidget() || !n || !n->renderer() || !n->renderer()->isWidget())
break;
RenderWidget* renderWidget = toRenderWidget(n->renderer());
Widget* widget = renderWidget->widget();
if (!widget || !widget->isFrameView())
break;
Frame* frame = static_cast<HTMLFrameElementBase*>(n)->contentFrame();
if (!frame || !frame->contentRenderer())
break;
FrameView* view = static_cast<FrameView*>(widget);
IntPoint widgetPoint(result.localPoint().x() + view->scrollX() - renderWidget->borderLeft() - renderWidget->paddingLeft(),
result.localPoint().y() + view->scrollY() - renderWidget->borderTop() - renderWidget->paddingTop());
HitTestResult widgetHitTestResult(widgetPoint);
frame->contentRenderer()->layer()->hitTest(HitTestRequest(hitType), widgetHitTestResult);
result = widgetHitTestResult;
if (testScrollbars == ShouldHitTestScrollbars) {
Scrollbar* eventScrollbar = view->scrollbarAtPoint(point);
if (eventScrollbar)
result.setScrollbar(eventScrollbar);
}
}
// If our HitTestResult is not visible, then we started hit testing too far down the frame chain.
// Another hit test at the main frame level should get us the correct visible result.
Frame* resultFrame = result.innerNonSharedNode() ? result.innerNonSharedNode()->document()->frame() : 0;
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame && resultFrame && resultFrame != mainFrame && !resultFrame->editor()->insideVisibleArea(result.point())) {
FrameView* resultView = resultFrame->view();
FrameView* mainView = mainFrame->view();
if (resultView && mainView) {
IntPoint windowPoint = resultView->contentsToWindow(result.point());
IntPoint mainFramePoint = mainView->windowToContents(windowPoint);
result = mainFrame->eventHandler()->hitTestResultAtPoint(mainFramePoint, allowShadowContent, ignoreClipping);
}
}
}
if (!allowShadowContent)
result.setToNonShadowAncestor();
return result;
}
void EventHandler::startAutoscrollTimer()
{
m_autoscrollTimer.startRepeating(autoscrollInterval);
}
void EventHandler::stopAutoscrollTimer(bool rendererIsBeingDestroyed)
{
if (m_autoscrollInProgress) {
if (m_mouseDownWasInSubframe) {
if (Frame* subframe = subframeForTargetNode(m_mousePressNode.get()))
subframe->eventHandler()->stopAutoscrollTimer(rendererIsBeingDestroyed);
return;
}
}
if (autoscrollRenderer()) {
if (!rendererIsBeingDestroyed && (m_autoscrollInProgress || m_panScrollInProgress))
toRenderBox(autoscrollRenderer())->stopAutoscroll();
#if ENABLE(PAN_SCROLLING)
if (m_panScrollInProgress) {
if (FrameView* view = m_frame->view()) {
view->removePanScrollIcon();
view->setCursor(pointerCursor());
}
}
#endif
setAutoscrollRenderer(0);
}
m_autoscrollTimer.stop();
m_panScrollInProgress = false;
m_springLoadedPanScrollInProgress = false;
// If we're not in the top frame we notify it that we are not doing a panScroll any more.
if (Page* page = m_frame->page()) {
Frame* mainFrame = page->mainFrame();
if (m_frame != mainFrame)
mainFrame->eventHandler()->setPanScrollInProgress(false);
}
m_autoscrollInProgress = false;
}
Node* EventHandler::mousePressNode() const
{
return m_mousePressNode.get();
}
void EventHandler::setMousePressNode(PassRefPtr<Node> node)
{
m_mousePressNode = node;
}
bool EventHandler::scrollOverflow(ScrollDirection direction, ScrollGranularity granularity)
{
Node* node = m_frame->document()->focusedNode();
if (!node)
node = m_mousePressNode.get();
if (node) {
RenderObject* r = node->renderer();
if (r && !r->isListBox() && r->enclosingBox()->scroll(direction, granularity)) {
setFrameWasScrolledByUser();
return true;
}
}
return false;
}
bool EventHandler::scrollRecursively(ScrollDirection direction, ScrollGranularity granularity)
{
bool handled = scrollOverflow(direction, granularity);
if (!handled) {
Frame* frame = m_frame;
do {
FrameView* view = frame->view();
handled = view ? view->scroll(direction, granularity) : false;
frame = frame->tree()->parent();
} while (!handled && frame);
}
return handled;
}
IntPoint EventHandler::currentMousePosition() const
{
return m_currentMousePosition;
}
Frame* subframeForHitTestResult(const MouseEventWithHitTestResults& hitTestResult)
{
if (!hitTestResult.isOverWidget())
return 0;
return EventHandler::subframeForTargetNode(hitTestResult.targetNode());
}
Frame* EventHandler::subframeForTargetNode(Node* node)
{
if (!node)
return 0;
RenderObject* renderer = node->renderer();
if (!renderer || !renderer->isWidget())
return 0;
Widget* widget = toRenderWidget(renderer)->widget();
if (!widget || !widget->isFrameView())
return 0;
return static_cast<FrameView*>(widget)->frame();
}
static bool isSubmitImage(Node* node)
{
return node && node->hasTagName(inputTag)
&& static_cast<HTMLInputElement*>(node)->inputType() == HTMLInputElement::IMAGE;
}
// Returns true if the node's editable block is not current focused for editing
static bool nodeIsNotBeingEdited(Node* node, Frame* frame)
{
return frame->selection()->rootEditableElement() != node->rootEditableElement();
}
Cursor EventHandler::selectCursor(const MouseEventWithHitTestResults& event, Scrollbar* scrollbar)
{
// During selection, use an I-beam no matter what we're over.
// If you're capturing mouse events for a particular node, don't treat this as a selection.
if (m_mousePressed && m_mouseDownMayStartSelect && m_frame->selection()->isCaretOrRange() && !m_capturingMouseEventsNode)
return iBeamCursor();
Node* node = event.targetNode();
RenderObject* renderer = node ? node->renderer() : 0;
RenderStyle* style = renderer ? renderer->style() : 0;
if (renderer && renderer->isFrameSet()) {
RenderFrameSet* frameSetRenderer = toRenderFrameSet(renderer);
if (frameSetRenderer->canResizeRow(event.localPoint()))
return rowResizeCursor();
if (frameSetRenderer->canResizeColumn(event.localPoint()))
return columnResizeCursor();
}
if (style && style->cursors()) {
const CursorList* cursors = style->cursors();
for (unsigned i = 0; i < cursors->size(); ++i) {
CachedImage* cimage = (*cursors)[i].cursorImage.get();
IntPoint hotSpot = (*cursors)[i].hotSpot;
if (!cimage)
continue;
// Limit the size of cursors so that they cannot be used to cover UI elements in chrome.
IntSize size = cimage->image()->size();
if (size.width() > 128 || size.height() > 128)
continue;
// Do not let the hotspot be outside the bounds of the image.
if (hotSpot.x() < 0 || hotSpot.y() < 0 || hotSpot.x() > size.width() || hotSpot.y() > size.height())
continue;
if (cimage->image()->isNull())
break;
if (!cimage->errorOccurred())
return Cursor(cimage->image(), hotSpot);
}
}
switch (style ? style->cursor() : CURSOR_AUTO) {
case CURSOR_AUTO: {
bool editable = (node && node->isContentEditable());
bool editableLinkEnabled = false;
// If the link is editable, then we need to check the settings to see whether or not the link should be followed
if (editable) {
ASSERT(m_frame->settings());
switch (m_frame->settings()->editableLinkBehavior()) {
default:
case EditableLinkDefaultBehavior:
case EditableLinkAlwaysLive:
editableLinkEnabled = true;
break;
case EditableLinkNeverLive:
editableLinkEnabled = false;
break;
case EditableLinkLiveWhenNotFocused:
editableLinkEnabled = nodeIsNotBeingEdited(node, m_frame) || event.event().shiftKey();
break;
case EditableLinkOnlyLiveWithShiftKey:
editableLinkEnabled = event.event().shiftKey();
break;
}
}
if ((event.isOverLink() || isSubmitImage(node)) && (!editable || editableLinkEnabled))
return handCursor();
bool inResizer = false;
if (renderer) {
if (RenderLayer* layer = renderer->enclosingLayer()) {
if (FrameView* view = m_frame->view())
inResizer = layer->isPointInResizeControl(view->windowToContents(event.event().pos()));
}
}
if ((editable || (renderer && renderer->isText() && node->canStartSelection())) && !inResizer && !scrollbar)
return iBeamCursor();
return pointerCursor();
}
case CURSOR_CROSS:
return crossCursor();
case CURSOR_POINTER:
return handCursor();
case CURSOR_MOVE:
return moveCursor();
case CURSOR_ALL_SCROLL:
return moveCursor();
case CURSOR_E_RESIZE:
return eastResizeCursor();
case CURSOR_W_RESIZE:
return westResizeCursor();
case CURSOR_N_RESIZE:
return northResizeCursor();
case CURSOR_S_RESIZE:
return southResizeCursor();
case CURSOR_NE_RESIZE:
return northEastResizeCursor();
case CURSOR_SW_RESIZE:
return southWestResizeCursor();
case CURSOR_NW_RESIZE:
return northWestResizeCursor();
case CURSOR_SE_RESIZE:
return southEastResizeCursor();
case CURSOR_NS_RESIZE:
return northSouthResizeCursor();
case CURSOR_EW_RESIZE:
return eastWestResizeCursor();
case CURSOR_NESW_RESIZE:
return northEastSouthWestResizeCursor();
case CURSOR_NWSE_RESIZE:
return northWestSouthEastResizeCursor();
case CURSOR_COL_RESIZE:
return columnResizeCursor();
case CURSOR_ROW_RESIZE:
return rowResizeCursor();
case CURSOR_TEXT:
return iBeamCursor();
case CURSOR_WAIT:
return waitCursor();
case CURSOR_HELP:
return helpCursor();
case CURSOR_VERTICAL_TEXT:
return verticalTextCursor();
case CURSOR_CELL:
return cellCursor();
case CURSOR_CONTEXT_MENU:
return contextMenuCursor();
case CURSOR_PROGRESS:
return progressCursor();
case CURSOR_NO_DROP:
return noDropCursor();
case CURSOR_ALIAS:
return aliasCursor();
case CURSOR_COPY:
return copyCursor();
case CURSOR_NONE:
return noneCursor();
case CURSOR_NOT_ALLOWED:
return notAllowedCursor();
case CURSOR_DEFAULT:
return pointerCursor();
case CURSOR_WEBKIT_ZOOM_IN:
return zoomInCursor();
case CURSOR_WEBKIT_ZOOM_OUT:
return zoomOutCursor();
case CURSOR_WEBKIT_GRAB:
return grabCursor();
case CURSOR_WEBKIT_GRABBING:
return grabbingCursor();
}
return pointerCursor();
}
static IntPoint documentPointForWindowPoint(Frame* frame, const IntPoint& windowPoint)
{
FrameView* view = frame->view();
// FIXME: Is it really OK to use the wrong coordinates here when view is 0?
// Historically the code would just crash; this is clearly no worse than that.
return view ? view->windowToContents(windowPoint) : windowPoint;
}
bool EventHandler::handleMousePressEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
m_mousePressed = true;
m_capturesDragging = true;
m_currentMousePosition = mouseEvent.pos();
m_mouseDownTimestamp = mouseEvent.timestamp();
#if ENABLE(DRAG_SUPPORT)
m_mouseDownMayStartDrag = false;
#endif
m_mouseDownMayStartSelect = false;
m_mouseDownMayStartAutoscroll = false;
if (FrameView* view = m_frame->view())
m_mouseDownPos = view->windowToContents(mouseEvent.pos());
else {
invalidateClick();
return false;
}
m_mouseDownWasInSubframe = false;
HitTestRequest request(HitTestRequest::Active);
// Save the document point we generate in case the window coordinate is invalidated by what happens
// when we dispatch the event.
IntPoint documentPoint = documentPointForWindowPoint(m_frame, mouseEvent.pos());
MouseEventWithHitTestResults mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
if (!mev.targetNode()) {
invalidateClick();
return false;
}
m_mousePressNode = mev.targetNode();
#if ENABLE(INSPECTOR)
if (Page* page = m_frame->page()) {
InspectorController* inspector = page->inspectorController();
if (inspector && inspector->enabled() && inspector->searchingForNodeInPage()) {
inspector->handleMousePressOnNode(m_mousePressNode.get());
invalidateClick();
return true;
}
}
#endif
Frame* subframe = subframeForHitTestResult(mev);
if (subframe && passMousePressEventToSubframe(mev, subframe)) {
// Start capturing future events for this frame. We only do this if we didn't clear
// the m_mousePressed flag, which may happen if an AppKit widget entered a modal event loop.
m_capturesDragging = subframe->eventHandler()->capturesDragging();
if (m_mousePressed && m_capturesDragging)
m_capturingMouseEventsNode = mev.targetNode();
invalidateClick();
return true;
}
#if ENABLE(PAN_SCROLLING)
Page* page = m_frame->page();
if (page && page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {
stopAutoscrollTimer();
invalidateClick();
return true;
}
if (mouseEvent.button() == MiddleButton && !mev.isOverLink()) {
RenderObject* renderer = mev.targetNode()->renderer();
while (renderer && (!renderer->isBox() || !toRenderBox(renderer)->canBeScrolledAndHasScrollableArea())) {
if (!renderer->parent() && renderer->node() == renderer->document() && renderer->document()->ownerElement())
renderer = renderer->document()->ownerElement()->renderer();
else
renderer = renderer->parent();
}
if (renderer) {
m_panScrollInProgress = true;
m_panScrollButtonPressed = true;
handleAutoscroll(renderer);
invalidateClick();
return true;
}
}
#endif
m_clickCount = mouseEvent.clickCount();
m_clickNode = mev.targetNode();
if (FrameView* view = m_frame->view()) {
RenderLayer* layer = m_clickNode->renderer() ? m_clickNode->renderer()->enclosingLayer() : 0;
IntPoint p = view->windowToContents(mouseEvent.pos());
if (layer && layer->isPointInResizeControl(p)) {
layer->setInResizeMode(true);
m_resizeLayer = layer;
m_offsetFromResizeCorner = layer->offsetFromResizeCorner(p);
invalidateClick();
return true;
}
}
bool swallowEvent = dispatchMouseEvent(eventNames().mousedownEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
m_capturesDragging = !swallowEvent;
// If the hit testing originally determined the event was in a scrollbar, refetch the MouseEventWithHitTestResults
// in case the scrollbar widget was destroyed when the mouse event was handled.
if (mev.scrollbar()) {
const bool wasLastScrollBar = mev.scrollbar() == m_lastScrollbarUnderMouse.get();
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
if (wasLastScrollBar && mev.scrollbar() != m_lastScrollbarUnderMouse.get())
m_lastScrollbarUnderMouse = 0;
}
if (swallowEvent) {
// scrollbars should get events anyway, even disabled controls might be scrollable
Scrollbar* scrollbar = mev.scrollbar();
updateLastScrollbarUnderMouse(scrollbar, true);
if (scrollbar)
passMousePressEventToScrollbar(mev, scrollbar);
} else {
// Refetch the event target node if it currently is the shadow node inside an <input> element.
// If a mouse event handler changes the input element type to one that has a widget associated,
// we'd like to EventHandler::handleMousePressEvent to pass the event to the widget and thus the
// event target node can't still be the shadow node.
if (mev.targetNode()->isShadowNode() && mev.targetNode()->shadowParentNode()->hasTagName(inputTag)) {
HitTestRequest request(HitTestRequest::ReadOnly | HitTestRequest::Active);
mev = m_frame->document()->prepareMouseEvent(request, documentPoint, mouseEvent);
}
FrameView* view = m_frame->view();
Scrollbar* scrollbar = view ? view->scrollbarAtPoint(mouseEvent.pos()) : 0;
if (!scrollbar)
scrollbar = mev.scrollbar();
updateLastScrollbarUnderMouse(scrollbar, true);
if (scrollbar && passMousePressEventToScrollbar(mev, scrollbar))
swallowEvent = true;
else
swallowEvent = handleMousePressEvent(mev);
}
return swallowEvent;
}
// This method only exists for platforms that don't know how to deliver
bool EventHandler::handleMouseDoubleClickEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
// We get this instead of a second mouse-up
m_mousePressed = false;
m_currentMousePosition = mouseEvent.pos();
HitTestRequest request(HitTestRequest::Active);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
Frame* subframe = subframeForHitTestResult(mev);
if (subframe && passMousePressEventToSubframe(mev, subframe)) {
m_capturingMouseEventsNode = 0;
return true;
}
m_clickCount = mouseEvent.clickCount();
bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
bool swallowClickEvent = false;
// Don't ever dispatch click events for right clicks
if (mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)
swallowClickEvent = dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
if (m_lastScrollbarUnderMouse)
swallowMouseUpEvent = m_lastScrollbarUnderMouse->mouseUp();
bool swallowMouseReleaseEvent = false;
if (!swallowMouseUpEvent)
swallowMouseReleaseEvent = handleMouseReleaseEvent(mev);
invalidateClick();
return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
}
bool EventHandler::mouseMoved(const PlatformMouseEvent& event)
{
HitTestResult hoveredNode = HitTestResult(IntPoint());
bool result = handleMouseMoveEvent(event, &hoveredNode);
Page* page = m_frame->page();
if (!page)
return result;
hoveredNode.setToNonShadowAncestor();
page->chrome()->mouseDidMoveOverElement(hoveredNode, event.modifierFlags());
page->chrome()->setToolTip(hoveredNode);
return result;
}
bool EventHandler::handleMouseMoveEvent(const PlatformMouseEvent& mouseEvent, HitTestResult* hoveredNode)
{
// in Radar 3703768 we saw frequent crashes apparently due to the
// part being null here, which seems impossible, so check for nil
// but also assert so that we can try to figure this out in debug
// builds, if it happens.
ASSERT(m_frame);
if (!m_frame)
return false;
RefPtr<FrameView> protector(m_frame->view());
m_currentMousePosition = mouseEvent.pos();
if (m_hoverTimer.isActive())
m_hoverTimer.stop();
#if ENABLE(SVG)
if (m_svgPan) {
static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition);
return true;
}
#endif
if (m_frameSetBeingResized)
return dispatchMouseEvent(eventNames().mousemoveEvent, m_frameSetBeingResized.get(), false, 0, mouseEvent, false);
// Send events right to a scrollbar if the mouse is pressed.
if (m_lastScrollbarUnderMouse && m_mousePressed)
return m_lastScrollbarUnderMouse->mouseMoved(mouseEvent);
// Treat mouse move events while the mouse is pressed as "read-only" in prepareMouseEvent
// if we are allowed to select.
// This means that :hover and :active freeze in the state they were in when the mouse
// was pressed, rather than updating for nodes the mouse moves over as you hold the mouse down.
int hitType = HitTestRequest::MouseMove;
if (m_mousePressed && m_mouseDownMayStartSelect)
hitType |= HitTestRequest::ReadOnly;
if (m_mousePressed)
hitType |= HitTestRequest::Active;
HitTestRequest request(hitType);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
if (hoveredNode)
*hoveredNode = mev.hitTestResult();
Scrollbar* scrollbar = 0;
if (m_resizeLayer && m_resizeLayer->inResizeMode())
m_resizeLayer->resize(mouseEvent, m_offsetFromResizeCorner);
else {
if (FrameView* view = m_frame->view())
scrollbar = view->scrollbarAtPoint(mouseEvent.pos());
if (!scrollbar)
scrollbar = mev.scrollbar();
updateLastScrollbarUnderMouse(scrollbar, !m_mousePressed);
}
bool swallowEvent = false;
RefPtr<Frame> newSubframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
// We want mouseouts to happen first, from the inside out. First send a move event to the last subframe so that it will fire mouseouts.
if (m_lastMouseMoveEventSubframe && m_lastMouseMoveEventSubframe->tree()->isDescendantOf(m_frame) && m_lastMouseMoveEventSubframe != newSubframe)
passMouseMoveEventToSubframe(mev, m_lastMouseMoveEventSubframe.get());
if (newSubframe) {
// Update over/out state before passing the event to the subframe.
updateMouseEventTargetNode(mev.targetNode(), mouseEvent, true);
// Event dispatch in updateMouseEventTargetNode may have caused the subframe of the target
// node to be detached from its FrameView, in which case the event should not be passed.
if (newSubframe->view())
swallowEvent |= passMouseMoveEventToSubframe(mev, newSubframe.get(), hoveredNode);
} else {
if (scrollbar && !m_mousePressed)
scrollbar->mouseMoved(mouseEvent); // Handle hover effects on platforms that support visual feedback on scrollbar hovering.
if (Page* page = m_frame->page()) {
if ((!m_resizeLayer || !m_resizeLayer->inResizeMode()) && !page->mainFrame()->eventHandler()->panScrollInProgress()) {
if (FrameView* view = m_frame->view())
view->setCursor(selectCursor(mev, scrollbar));
}
}
}
m_lastMouseMoveEventSubframe = newSubframe;
if (swallowEvent)
return true;
swallowEvent = dispatchMouseEvent(eventNames().mousemoveEvent, mev.targetNode(), false, 0, mouseEvent, true);
#if ENABLE(DRAG_SUPPORT)
if (!swallowEvent)
swallowEvent = handleMouseDraggedEvent(mev);
#endif // ENABLE(DRAG_SUPPORT)
return swallowEvent;
}
void EventHandler::invalidateClick()
{
m_clickCount = 0;
m_clickNode = 0;
}
bool EventHandler::handleMouseReleaseEvent(const PlatformMouseEvent& mouseEvent)
{
RefPtr<FrameView> protector(m_frame->view());
#if ENABLE(PAN_SCROLLING)
if (mouseEvent.button() == MiddleButton)
m_panScrollButtonPressed = false;
if (m_springLoadedPanScrollInProgress)
stopAutoscrollTimer();
#endif
m_mousePressed = false;
m_currentMousePosition = mouseEvent.pos();
#if ENABLE(SVG)
if (m_svgPan) {
m_svgPan = false;
static_cast<SVGDocument*>(m_frame->document())->updatePan(m_currentMousePosition);
return true;
}
#endif
if (m_frameSetBeingResized)
return dispatchMouseEvent(eventNames().mouseupEvent, m_frameSetBeingResized.get(), true, m_clickCount, mouseEvent, false);
if (m_lastScrollbarUnderMouse) {
invalidateClick();
return m_lastScrollbarUnderMouse->mouseUp();
}
HitTestRequest request(HitTestRequest::MouseUp);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, mouseEvent);
Frame* subframe = m_capturingMouseEventsNode.get() ? subframeForTargetNode(m_capturingMouseEventsNode.get()) : subframeForHitTestResult(mev);
if (subframe && passMouseReleaseEventToSubframe(mev, subframe)) {
m_capturingMouseEventsNode = 0;
return true;
}
bool swallowMouseUpEvent = dispatchMouseEvent(eventNames().mouseupEvent, mev.targetNode(), true, m_clickCount, mouseEvent, false);
// Don't ever dispatch click events for right clicks
bool swallowClickEvent = false;
if (m_clickCount > 0 && mouseEvent.button() != RightButton && mev.targetNode() == m_clickNode)
swallowClickEvent = dispatchMouseEvent(eventNames().clickEvent, mev.targetNode(), true, m_clickCount, mouseEvent, true);
if (m_resizeLayer) {
m_resizeLayer->setInResizeMode(false);
m_resizeLayer = 0;
}
bool swallowMouseReleaseEvent = false;
if (!swallowMouseUpEvent)
swallowMouseReleaseEvent = handleMouseReleaseEvent(mev);
invalidateClick();
return swallowMouseUpEvent || swallowClickEvent || swallowMouseReleaseEvent;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Node* dragTarget, const PlatformMouseEvent& event, Clipboard* clipboard)
{
FrameView* view = m_frame->view();
// FIXME: We might want to dispatch a dragleave even if the view is gone.
if (!view)
return false;
view->resetDeferredRepaintDelay();
IntPoint contentsPos = view->windowToContents(event.pos());
RefPtr<MouseEvent> me = MouseEvent::create(eventType,
true, true, m_frame->document()->defaultView(),
0, event.globalX(), event.globalY(), contentsPos.x(), contentsPos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey(),
0, 0, clipboard);
ExceptionCode ec;
dragTarget->dispatchEvent(me.get(), ec);
return me->defaultPrevented();
}
bool EventHandler::canHandleDragAndDropForTarget(DragAndDropHandleType type, Node* target, const PlatformMouseEvent& event, Clipboard* clipboard, bool* accepted)
{
bool canHandle = false;
bool wasAccepted = false;
if (target->hasTagName(frameTag) || target->hasTagName(iframeTag)) {
Frame* frame = static_cast<HTMLFrameElementBase*>(target)->contentFrame();
if (frame) {
switch (type) {
case UpdateDragAndDrop:
wasAccepted = frame->eventHandler()->updateDragAndDrop(event, clipboard);
break;
case CancelDragAndDrop:
frame->eventHandler()->cancelDragAndDrop(event, clipboard);
break;
case PerformDragAndDrop:
wasAccepted = frame->eventHandler()->performDragAndDrop(event, clipboard);
break;
}
}
} else
canHandle = true;
if (accepted)
*accepted = wasAccepted;
return canHandle;
}
bool EventHandler::updateDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
bool accept = false;
if (!m_frame->view())
return false;
HitTestRequest request(HitTestRequest::ReadOnly);
MouseEventWithHitTestResults mev = prepareMouseEvent(request, event);
// Drag events should never go to text nodes (following IE, and proper mouseover/out dispatch)
Node* newTarget = mev.targetNode();
if (newTarget && newTarget->isTextNode())
newTarget = newTarget->parentNode();
if (newTarget)
newTarget = newTarget->shadowAncestorNode();
if (m_dragTarget != newTarget) {
// FIXME: this ordering was explicitly chosen to match WinIE. However,
// it is sometimes incorrect when dragging within subframes, as seen with
// LayoutTests/fast/events/drag-in-frames.html.
//
// Moreover, this ordering conforms to section 7.9.4 of the HTML 5 spec. <http://dev.w3.org/html5/spec/Overview.html#drag-and-drop-processing-model>.
if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) {
// As per section 7.9.4 of the HTML 5 spec., we must always fire a drag event before firing a dragenter, dragleave, or dragover event.
if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
// for now we don't care if event handler cancels default behavior, since there is none
dispatchDragSrcEvent(eventNames().dragEvent, event);
}
accept = dispatchDragEvent(eventNames().dragenterEvent, newTarget, event, clipboard);
}
if (m_dragTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, m_dragTarget.get(), event, clipboard, &accept))
dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
if (newTarget) {
// We do not explicitly call dispatchDragEvent here because it could ultimately result in the appearance that
// two dragover events fired. So, we mark that we should only fire a dragover event on the next call to this function.
m_shouldOnlyFireDragOverEvent = true;
}
} else {
if (newTarget && canHandleDragAndDropForTarget(UpdateDragAndDrop, newTarget, event, clipboard, &accept)) {
// Note, when dealing with sub-frames, we may need to fire only a dragover event as a drag event may have been fired earlier.
if (!m_shouldOnlyFireDragOverEvent && dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
// for now we don't care if event handler cancels default behavior, since there is none
dispatchDragSrcEvent(eventNames().dragEvent, event);
}
accept = dispatchDragEvent(eventNames().dragoverEvent, newTarget, event, clipboard);
m_shouldOnlyFireDragOverEvent = false;
}
}
m_dragTarget = newTarget;
return accept;
}
void EventHandler::cancelDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
if (m_dragTarget && canHandleDragAndDropForTarget(CancelDragAndDrop, m_dragTarget.get(), event, clipboard)) {
if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML)
dispatchDragSrcEvent(eventNames().dragEvent, event);
dispatchDragEvent(eventNames().dragleaveEvent, m_dragTarget.get(), event, clipboard);
}
clearDragState();
}
bool EventHandler::performDragAndDrop(const PlatformMouseEvent& event, Clipboard* clipboard)
{
bool accept = false;
if (m_dragTarget && canHandleDragAndDropForTarget(PerformDragAndDrop, m_dragTarget.get(), event, clipboard, &accept))
dispatchDragEvent(eventNames().dropEvent, m_dragTarget.get(), event, clipboard);
clearDragState();
return accept;
}
void EventHandler::clearDragState()
{
m_dragTarget = 0;
m_capturingMouseEventsNode = 0;
m_shouldOnlyFireDragOverEvent = false;
#if PLATFORM(MAC)
m_sendingEventToSubview = false;
#endif
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::setCapturingMouseEventsNode(PassRefPtr<Node> n)
{
m_capturingMouseEventsNode = n;
}
MouseEventWithHitTestResults EventHandler::prepareMouseEvent(const HitTestRequest& request, const PlatformMouseEvent& mev)
{
ASSERT(m_frame);
ASSERT(m_frame->document());
return m_frame->document()->prepareMouseEvent(request, documentPointForWindowPoint(m_frame, mev.pos()), mev);
}
#if ENABLE(SVG)
static inline SVGElementInstance* instanceAssociatedWithShadowTreeElement(Node* referenceNode)
{
if (!referenceNode || !referenceNode->isSVGElement())
return 0;
Node* shadowTreeElement = referenceNode->shadowTreeRootNode();
if (!shadowTreeElement)
return 0;
Node* shadowTreeParentElement = shadowTreeElement->shadowParentNode();
if (!shadowTreeParentElement)
return 0;
ASSERT(shadowTreeParentElement->hasTagName(useTag));
return static_cast<SVGUseElement*>(shadowTreeParentElement)->instanceForShadowTreeElement(referenceNode);
}
#endif
void EventHandler::updateMouseEventTargetNode(Node* targetNode, const PlatformMouseEvent& mouseEvent, bool fireMouseOverOut)
{
Node* result = targetNode;
// If we're capturing, we always go right to that node.
if (m_capturingMouseEventsNode)
result = m_capturingMouseEventsNode.get();
else {
// If the target node is a text node, dispatch on the parent node - rdar://4196646
if (result && result->isTextNode())
result = result->parentNode();
if (result)
result = result->shadowAncestorNode();
}
m_nodeUnderMouse = result;
#if ENABLE(SVG)
m_instanceUnderMouse = instanceAssociatedWithShadowTreeElement(result);
// <use> shadow tree elements may have been recloned, update node under mouse in any case
if (m_lastInstanceUnderMouse) {
SVGElement* lastCorrespondingElement = m_lastInstanceUnderMouse->correspondingElement();
SVGElement* lastCorrespondingUseElement = m_lastInstanceUnderMouse->correspondingUseElement();
if (lastCorrespondingElement && lastCorrespondingUseElement) {
HashSet<SVGElementInstance*> instances = lastCorrespondingElement->instancesForElement();
// Locate the recloned shadow tree element for our corresponding instance
HashSet<SVGElementInstance*>::iterator end = instances.end();
for (HashSet<SVGElementInstance*>::iterator it = instances.begin(); it != end; ++it) {
SVGElementInstance* instance = (*it);
ASSERT(instance->correspondingElement() == lastCorrespondingElement);
if (instance == m_lastInstanceUnderMouse)
continue;
if (instance->correspondingUseElement() != lastCorrespondingUseElement)
continue;
SVGElement* shadowTreeElement = instance->shadowTreeElement();
if (!shadowTreeElement->inDocument() || m_lastNodeUnderMouse == shadowTreeElement)
continue;
m_lastNodeUnderMouse = shadowTreeElement;
m_lastInstanceUnderMouse = instance;
break;
}
}
}
#endif
// Fire mouseout/mouseover if the mouse has shifted to a different node.
if (fireMouseOverOut) {
if (m_lastNodeUnderMouse && m_lastNodeUnderMouse->document() != m_frame->document()) {
m_lastNodeUnderMouse = 0;
m_lastScrollbarUnderMouse = 0;
#if ENABLE(SVG)
m_lastInstanceUnderMouse = 0;
#endif
}
if (m_lastNodeUnderMouse != m_nodeUnderMouse) {
// send mouseout event to the old node
if (m_lastNodeUnderMouse)
m_lastNodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoutEvent, 0, m_nodeUnderMouse.get());
// send mouseover event to the new node
if (m_nodeUnderMouse)
m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventNames().mouseoverEvent, 0, m_lastNodeUnderMouse.get());
}
m_lastNodeUnderMouse = m_nodeUnderMouse;
#if ENABLE(SVG)
m_lastInstanceUnderMouse = instanceAssociatedWithShadowTreeElement(m_nodeUnderMouse.get());
#endif
}
}
bool EventHandler::dispatchMouseEvent(const AtomicString& eventType, Node* targetNode, bool /*cancelable*/, int clickCount, const PlatformMouseEvent& mouseEvent, bool setUnder)
{
if (FrameView* view = m_frame->view())
view->resetDeferredRepaintDelay();
updateMouseEventTargetNode(targetNode, mouseEvent, setUnder);
bool swallowEvent = false;
if (m_nodeUnderMouse)
swallowEvent = m_nodeUnderMouse->dispatchMouseEvent(mouseEvent, eventType, clickCount);
if (!swallowEvent && eventType == eventNames().mousedownEvent) {
// The layout needs to be up to date to determine if an element is focusable.
m_frame->document()->updateLayoutIgnorePendingStylesheets();
// Blur current focus node when a link/button is clicked; this
// is expected by some sites that rely on onChange handlers running
// from form fields before the button click is processed.
Node* node = m_nodeUnderMouse.get();
RenderObject* renderer = node ? node->renderer() : 0;
// Walk up the render tree to search for a node to focus.
// Walking up the DOM tree wouldn't work for shadow trees, like those behind the engine-based text fields.
while (renderer) {
node = renderer->node();
if (node && node->isFocusable()) {
// To fix <rdar://problem/4895428> Can't drag selected ToDo, we don't focus a
// node on mouse down if it's selected and inside a focused node. It will be
// focused if the user does a mouseup over it, however, because the mouseup
// will set a selection inside it, which will call setFocuseNodeIfNeeded.
ExceptionCode ec = 0;
Node* n = node->isShadowNode() ? node->shadowParentNode() : node;
if (m_frame->selection()->isRange() &&
m_frame->selection()->toNormalizedRange()->compareNode(n, ec) == Range::NODE_INSIDE &&
n->isDescendantOf(m_frame->document()->focusedNode()))
return false;
break;
}
renderer = renderer->parent();
}
// If focus shift is blocked, we eat the event. Note we should never clear swallowEvent
// if the page already set it (e.g., by canceling default behavior).
if (Page* page = m_frame->page()) {
if (node && node->isMouseFocusable()) {
if (!page->focusController()->setFocusedNode(node, m_frame))
swallowEvent = true;
} else if (!node || !node->focused()) {
if (!page->focusController()->setFocusedNode(0, m_frame))
swallowEvent = true;
}
}
}
return swallowEvent;
}
#if !PLATFORM(GTK) && !(PLATFORM(CHROMIUM) && PLATFORM(LINUX))
bool EventHandler::shouldTurnVerticalTicksIntoHorizontal(const HitTestResult&) const
{
return false;
}
#endif
bool EventHandler::handleWheelEvent(PlatformWheelEvent& e)
{
Document* doc = m_frame->document();
RenderObject* docRenderer = doc->renderer();
if (!docRenderer)
return false;
RefPtr<FrameView> protector(m_frame->view());
FrameView* view = m_frame->view();
if (!view)
return false;
setFrameWasScrolledByUser();
IntPoint vPoint = view->windowToContents(e.pos());
Node* node;
bool isOverWidget;
bool didSetLatchedNode = false;
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(vPoint);
doc->renderView()->layer()->hitTest(request, result);
if (m_useLatchedWheelEventNode) {
if (!m_latchedWheelEventNode) {
m_latchedWheelEventNode = result.innerNode();
m_widgetIsLatched = result.isOverWidget();
didSetLatchedNode = true;
}
node = m_latchedWheelEventNode.get();
isOverWidget = m_widgetIsLatched;
} else {
if (m_latchedWheelEventNode)
m_latchedWheelEventNode = 0;
if (m_previousWheelScrolledNode)
m_previousWheelScrolledNode = 0;
node = result.innerNode();
isOverWidget = result.isOverWidget();
}
if (shouldTurnVerticalTicksIntoHorizontal(result))
e.turnVerticalTicksIntoHorizontal();
if (node) {
// Figure out which view to send the event to.
RenderObject* target = node->renderer();
if (isOverWidget && target && target->isWidget()) {
Widget* widget = toRenderWidget(target)->widget();
if (widget && passWheelEventToWidget(e, widget)) {
e.accept();
return true;
}
}
node = node->shadowAncestorNode();
node->dispatchWheelEvent(e);
if (e.isAccepted())
return true;
// If we don't have a renderer, send the wheel event to the first node we find with a renderer.
// This is needed for <option> and <optgroup> elements so that <select>s get a wheel scroll.
while (node && !node->renderer())
node = node->parent();
if (node && node->renderer()) {
// Just break up into two scrolls if we need to. Diagonal movement on
// a MacBook pro is an example of a 2-dimensional mouse wheel event (where both deltaX and deltaY can be set).
Node* stopNode = m_previousWheelScrolledNode.get();
scrollAndAcceptEvent(e.deltaX(), ScrollLeft, ScrollRight, e, node, &stopNode);
scrollAndAcceptEvent(e.deltaY(), ScrollUp, ScrollDown, e, node, &stopNode);
if (!m_useLatchedWheelEventNode)
m_previousWheelScrolledNode = stopNode;
}
}
if (e.isAccepted())
return true;
view = m_frame->view();
if (!view)
return false;
view->wheelEvent(e);
return e.isAccepted();
}
#if ENABLE(CONTEXT_MENUS)
bool EventHandler::sendContextMenuEvent(const PlatformMouseEvent& event)
{
Document* doc = m_frame->document();
FrameView* v = m_frame->view();
if (!v)
return false;
bool swallowEvent;
IntPoint viewportPos = v->windowToContents(event.pos());
HitTestRequest request(HitTestRequest::Active);
MouseEventWithHitTestResults mev = doc->prepareMouseEvent(request, viewportPos, event);
// Context menu events shouldn't select text in GTK+ applications or in Chromium.
// FIXME: This should probably be configurable by embedders. Consider making it a WebPreferences setting.
// See: https://bugs.webkit.org/show_bug.cgi?id=15279
#if !PLATFORM(GTK) && !PLATFORM(CHROMIUM)
if (!m_frame->selection()->contains(viewportPos) &&
// FIXME: In the editable case, word selection sometimes selects content that isn't underneath the mouse.
// If the selection is non-editable, we do word selection to make it easier to use the contextual menu items
// available for text selections. But only if we're above text.
(m_frame->selection()->isContentEditable() || (mev.targetNode() && mev.targetNode()->isTextNode()))) {
m_mouseDownMayStartSelect = true; // context menu events are always allowed to perform a selection
selectClosestWordOrLinkFromMouseEvent(mev);
}
#endif
swallowEvent = dispatchMouseEvent(eventNames().contextmenuEvent, mev.targetNode(), true, 0, event, true);
return swallowEvent;
}
#endif // ENABLE(CONTEXT_MENUS)
void EventHandler::scheduleHoverStateUpdate()
{
if (!m_hoverTimer.isActive())
m_hoverTimer.startOneShot(0);
}
// Whether or not a mouse down can begin the creation of a selection. Fires the selectStart event.
bool EventHandler::canMouseDownStartSelect(Node* node)
{
if (!node || !node->renderer())
return true;
// Some controls and images can't start a select on a mouse down.
if (!node->canStartSelection())
return false;
for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {
if (Node* node = curr->node())
return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
}
return true;
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::canMouseDragExtendSelect(Node* node)
{
if (!node || !node->renderer())
return true;
for (RenderObject* curr = node->renderer(); curr; curr = curr->parent()) {
if (Node* node = curr->node())
return node->dispatchEvent(Event::create(eventNames().selectstartEvent, true, true));
}
return true;
}
#endif // ENABLE(DRAG_SUPPORT)
void EventHandler::setResizingFrameSet(HTMLFrameSetElement* frameSet)
{
m_frameSetBeingResized = frameSet;
}
void EventHandler::resizeLayerDestroyed()
{
ASSERT(m_resizeLayer);
m_resizeLayer = 0;
}
void EventHandler::hoverTimerFired(Timer<EventHandler>*)
{
m_hoverTimer.stop();
ASSERT(m_frame);
ASSERT(m_frame->document());
if (RenderView* renderer = m_frame->contentRenderer()) {
if (FrameView* view = m_frame->view()) {
HitTestRequest request(HitTestRequest::MouseMove);
HitTestResult result(view->windowToContents(m_currentMousePosition));
renderer->layer()->hitTest(request, result);
m_frame->document()->updateStyleIfNeeded();
}
}
}
static Node* eventTargetNodeForDocument(Document* doc)
{
if (!doc)
return 0;
Node* node = doc->focusedNode();
#if defined(ANDROID_PLUGINS)
if (!node && doc->frame() && doc->frame()->view())
node = android::WebViewCore::getWebViewCore(doc->frame()->view())
->cursorNodeIsPlugin();
#endif
if (!node && doc->isHTMLDocument())
node = doc->body();
if (!node)
node = doc->documentElement();
return node;
}
bool EventHandler::handleAccessKey(const PlatformKeyboardEvent& evt)
{
// FIXME: Ignoring the state of Shift key is what neither IE nor Firefox do.
// IE matches lower and upper case access keys regardless of Shift key state - but if both upper and
// lower case variants are present in a document, the correct element is matched based on Shift key state.
// Firefox only matches an access key if Shift is not pressed, and does that case-insensitively.
ASSERT(!(accessKeyModifiers() & PlatformKeyboardEvent::ShiftKey));
if ((evt.modifiers() & ~PlatformKeyboardEvent::ShiftKey) != accessKeyModifiers())
return false;
String key = evt.unmodifiedText();
Element* elem = m_frame->document()->getElementByAccessKey(key.lower());
if (!elem)
return false;
elem->accessKeyAction(false);
return true;
}
#if !PLATFORM(MAC)
bool EventHandler::needsKeyboardEventDisambiguationQuirks() const
{
return false;
}
#endif
bool EventHandler::keyEvent(const PlatformKeyboardEvent& initialKeyEvent)
{
#if ENABLE(PAN_SCROLLING)
if (Page* page = m_frame->page()) {
if (page->mainFrame()->eventHandler()->panScrollInProgress() || m_autoscrollInProgress) {
// If a key is pressed while the autoscroll/panScroll is in progress then we want to stop
if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown || initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown)
stopAutoscrollTimer();
// If we were in autoscroll/panscroll mode, we swallow the key event
return true;
}
}
#endif
// Check for cases where we are too early for events -- possible unmatched key up
// from pressing return in the location bar.
RefPtr<Node> node = eventTargetNodeForDocument(m_frame->document());
if (!node)
return false;
if (FrameView* view = m_frame->view())
view->resetDeferredRepaintDelay();
// FIXME: what is this doing here, in keyboard event handler?
m_frame->loader()->resetMultipleFormSubmissionProtection();
// In IE, access keys are special, they are handled after default keydown processing, but cannot be canceled - this is hard to match.
// On Mac OS X, we process them before dispatching keydown, as the default keydown handler implements Emacs key bindings, which may conflict
// with access keys. Then we dispatch keydown, but suppress its default handling.
// On Windows, WebKit explicitly calls handleAccessKey() instead of dispatching a keypress event for WM_SYSCHAR messages.
// Other platforms currently match either Mac or Windows behavior, depending on whether they send combined KeyDown events.
bool matchedAnAccessKey = false;
if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyDown)
matchedAnAccessKey = handleAccessKey(initialKeyEvent);
// FIXME: it would be fair to let an input method handle KeyUp events before DOM dispatch.
if (initialKeyEvent.type() == PlatformKeyboardEvent::KeyUp || initialKeyEvent.type() == PlatformKeyboardEvent::Char)
return !node->dispatchKeyEvent(initialKeyEvent);
bool backwardCompatibilityMode = needsKeyboardEventDisambiguationQuirks();
ExceptionCode ec;
PlatformKeyboardEvent keyDownEvent = initialKeyEvent;
if (keyDownEvent.type() != PlatformKeyboardEvent::RawKeyDown)
keyDownEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::RawKeyDown, backwardCompatibilityMode);
RefPtr<KeyboardEvent> keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
if (matchedAnAccessKey)
keydown->setDefaultPrevented(true);
keydown->setTarget(node);
if (initialKeyEvent.type() == PlatformKeyboardEvent::RawKeyDown) {
node->dispatchEvent(keydown, ec);
return keydown->defaultHandled() || keydown->defaultPrevented();
}
// Run input method in advance of DOM event handling. This may result in the IM
// modifying the page prior the keydown event, but this behaviour is necessary
// in order to match IE:
// 1. preventing default handling of keydown and keypress events has no effect on IM input;
// 2. if an input method handles the event, its keyCode is set to 229 in keydown event.
m_frame->editor()->handleInputMethodKeydown(keydown.get());
bool handledByInputMethod = keydown->defaultHandled();
if (handledByInputMethod) {
keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode);
keydown = KeyboardEvent::create(keyDownEvent, m_frame->document()->defaultView());
keydown->setTarget(node);
keydown->setDefaultHandled();
}
node->dispatchEvent(keydown, ec);
bool keydownResult = keydown->defaultHandled() || keydown->defaultPrevented();
if (handledByInputMethod || (keydownResult && !backwardCompatibilityMode))
return keydownResult;
// Focus may have changed during keydown handling, so refetch node.
// But if we are dispatching a fake backward compatibility keypress, then we pretend that the keypress happened on the original node.
if (!keydownResult) {
node = eventTargetNodeForDocument(m_frame->document());
if (!node)
return false;
}
PlatformKeyboardEvent keyPressEvent = initialKeyEvent;
keyPressEvent.disambiguateKeyDownEvent(PlatformKeyboardEvent::Char, backwardCompatibilityMode);
if (keyPressEvent.text().isEmpty())
return keydownResult;
RefPtr<KeyboardEvent> keypress = KeyboardEvent::create(keyPressEvent, m_frame->document()->defaultView());
keypress->setTarget(node);
if (keydownResult)
keypress->setDefaultPrevented(true);
#if PLATFORM(MAC)
keypress->keypressCommands() = keydown->keypressCommands();
#endif
node->dispatchEvent(keypress, ec);
return keydownResult || keypress->defaultPrevented() || keypress->defaultHandled();
}
void EventHandler::handleKeyboardSelectionMovement(KeyboardEvent* event)
{
if (!event)
return;
String key = event->keyIdentifier();
bool isShifted = event->getModifierState("Shift");
bool isOptioned = event->getModifierState("Alt");
bool isCommanded = event->getModifierState("Meta");
if (key == "Up") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::BACKWARD, (isCommanded) ? DocumentBoundary : LineGranularity, true);
event->setDefaultHandled();
}
else if (key == "Down") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::FORWARD, (isCommanded) ? DocumentBoundary : LineGranularity, true);
event->setDefaultHandled();
}
else if (key == "Left") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::LEFT, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
event->setDefaultHandled();
}
else if (key == "Right") {
m_frame->selection()->modify((isShifted) ? SelectionController::EXTEND : SelectionController::MOVE, SelectionController::RIGHT, (isCommanded) ? LineBoundary : (isOptioned) ? WordGranularity : CharacterGranularity, true);
event->setDefaultHandled();
}
}
void EventHandler::defaultKeyboardEventHandler(KeyboardEvent* event)
{
if (event->type() == eventNames().keydownEvent) {
m_frame->editor()->handleKeyboardEvent(event);
if (event->defaultHandled())
return;
if (event->keyIdentifier() == "U+0009")
defaultTabEventHandler(event);
// provides KB navigation and selection for enhanced accessibility users
if (AXObjectCache::accessibilityEnhancedUserInterfaceEnabled())
handleKeyboardSelectionMovement(event);
}
if (event->type() == eventNames().keypressEvent) {
m_frame->editor()->handleKeyboardEvent(event);
if (event->defaultHandled())
return;
if (event->charCode() == ' ')
defaultSpaceEventHandler(event);
}
}
#if ENABLE(DRAG_SUPPORT)
bool EventHandler::dragHysteresisExceeded(const FloatPoint& floatDragViewportLocation) const
{
IntPoint dragViewportLocation((int)floatDragViewportLocation.x(), (int)floatDragViewportLocation.y());
return dragHysteresisExceeded(dragViewportLocation);
}
bool EventHandler::dragHysteresisExceeded(const IntPoint& dragViewportLocation) const
{
FrameView* view = m_frame->view();
if (!view)
return false;
IntPoint dragLocation = view->windowToContents(dragViewportLocation);
IntSize delta = dragLocation - m_mouseDownPos;
int threshold = GeneralDragHysteresis;
if (dragState().m_dragSrcIsImage)
threshold = ImageDragHysteresis;
else if (dragState().m_dragSrcIsLink)
threshold = LinkDragHysteresis;
else if (dragState().m_dragSrcInSelection)
threshold = TextDragHysteresis;
return abs(delta.width()) >= threshold || abs(delta.height()) >= threshold;
}
void EventHandler::freeClipboard()
{
if (dragState().m_dragClipboard)
dragState().m_dragClipboard->setAccessPolicy(ClipboardNumb);
}
bool EventHandler::shouldDragAutoNode(Node* node, const IntPoint& point) const
{
if (!node || !m_frame->view())
return false;
Page* page = m_frame->page();
return page && page->dragController()->mayStartDragAtEventLocation(m_frame, point);
}
void EventHandler::dragSourceEndedAt(const PlatformMouseEvent& event, DragOperation operation)
{
if (dragState().m_dragSrc && dragState().m_dragSrcMayBeDHTML) {
dragState().m_dragClipboard->setDestinationOperation(operation);
// for now we don't care if event handler cancels default behavior, since there is none
dispatchDragSrcEvent(eventNames().dragendEvent, event);
}
freeClipboard();
dragState().m_dragSrc = 0;
// In case the drag was ended due to an escape key press we need to ensure
// that consecutive mousemove events don't reinitiate the drag and drop.
m_mouseDownMayStartDrag = false;
}
// returns if we should continue "default processing", i.e., whether eventhandler canceled
bool EventHandler::dispatchDragSrcEvent(const AtomicString& eventType, const PlatformMouseEvent& event)
{
return !dispatchDragEvent(eventType, dragState().m_dragSrc.get(), event, dragState().m_dragClipboard.get());
}
bool EventHandler::handleDrag(const MouseEventWithHitTestResults& event)
{
if (event.event().button() != LeftButton || event.event().eventType() != MouseEventMoved) {
// If we allowed the other side of the bridge to handle a drag
// last time, then m_mousePressed might still be set. So we
// clear it now to make sure the next move after a drag
// doesn't look like a drag.
m_mousePressed = false;
return false;
}
if (eventLoopHandleMouseDragged(event))
return true;
// Careful that the drag starting logic stays in sync with eventMayStartDrag()
if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
allowDHTMLDrag(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA);
if (!dragState().m_dragSrcMayBeDHTML && !dragState().m_dragSrcMayBeUA)
m_mouseDownMayStartDrag = false; // no element is draggable
}
if (m_mouseDownMayStartDrag && !dragState().m_dragSrc) {
// try to find an element that wants to be dragged
HitTestRequest request(HitTestRequest::ReadOnly);
HitTestResult result(m_mouseDownPos);
m_frame->contentRenderer()->layer()->hitTest(request, result);
Node* node = result.innerNode();
if (node && node->renderer())
dragState().m_dragSrc = node->renderer()->draggableNode(dragState().m_dragSrcMayBeDHTML, dragState().m_dragSrcMayBeUA,
m_mouseDownPos.x(), m_mouseDownPos.y(), dragState().m_dragSrcIsDHTML);
else
dragState().m_dragSrc = 0;
if (!dragState().m_dragSrc)
m_mouseDownMayStartDrag = false; // no element is draggable
else {
// remember some facts about this source, while we have a HitTestResult handy
node = result.URLElement();
dragState().m_dragSrcIsLink = node && node->isLink();
node = result.innerNonSharedNode();
dragState().m_dragSrcIsImage = node && node->renderer() && node->renderer()->isImage();
dragState().m_dragSrcInSelection = m_frame->selection()->contains(m_mouseDownPos);
}
}
// For drags starting in the selection, the user must wait between the mousedown and mousedrag,
// or else we bail on the dragging stuff and allow selection to occur
if (m_mouseDownMayStartDrag && !dragState().m_dragSrcIsImage && dragState().m_dragSrcInSelection && event.event().timestamp() - m_mouseDownTimestamp < TextDragDelay) {
m_mouseDownMayStartDrag = false;
dragState().m_dragSrc = 0;
// ...but if this was the first click in the window, we don't even want to start selection
if (eventActivatedView(event.event()))
m_mouseDownMayStartSelect = false;
}
if (!m_mouseDownMayStartDrag)
return !mouseDownMayStartSelect() && !m_mouseDownMayStartAutoscroll;
// We are starting a text/image/url drag, so the cursor should be an arrow
if (FrameView* view = m_frame->view())
view->setCursor(pointerCursor());
if (!dragHysteresisExceeded(event.event().pos()))
return true;
// Once we're past the hysteresis point, we don't want to treat this gesture as a click
invalidateClick();
DragOperation srcOp = DragOperationNone;
freeClipboard(); // would only happen if we missed a dragEnd. Do it anyway, just
// to make sure it gets numbified
dragState().m_dragClipboard = createDraggingClipboard();
if (dragState().m_dragSrcMayBeDHTML) {
// Check to see if the is a DOM based drag, if it is get the DOM specified drag
// image and offset
if (dragState().m_dragSrcIsDHTML) {
if (RenderObject* renderer = dragState().m_dragSrc->renderer()) {
// FIXME: This doesn't work correctly with transforms.
FloatPoint absPos = renderer->localToAbsolute();
IntSize delta = m_mouseDownPos - roundedIntPoint(absPos);
dragState().m_dragClipboard->setDragImageElement(dragState().m_dragSrc.get(), IntPoint() + delta);
} else {
// The renderer has disappeared, this can happen if the onStartDrag handler has hidden
// the element in some way. In this case we just kill the drag.
m_mouseDownMayStartDrag = false;
goto cleanupDrag;
}
}
m_mouseDownMayStartDrag = dispatchDragSrcEvent(eventNames().dragstartEvent, m_mouseDown)
&& !m_frame->selection()->isInPasswordField();
// Invalidate clipboard here against anymore pasteboard writing for security. The drag
// image can still be changed as we drag, but not the pasteboard data.
dragState().m_dragClipboard->setAccessPolicy(ClipboardImageWritable);
if (m_mouseDownMayStartDrag) {
// gather values from DHTML element, if it set any
dragState().m_dragClipboard->sourceOperation(srcOp);
// Yuck, a draggedImage:moveTo: message can be fired as a result of kicking off the
// drag with dragImage! Because of that dumb reentrancy, we may think we've not
// started the drag when that happens. So we have to assume it's started before we
// kick it off.
dragState().m_dragClipboard->setDragHasStarted();
}
}
if (m_mouseDownMayStartDrag) {
Page* page = m_frame->page();
DragController* dragController = page ? page->dragController() : 0;
bool startedDrag = dragController && dragController->startDrag(m_frame, dragState().m_dragClipboard.get(), srcOp, event.event(), m_mouseDownPos, dragState().m_dragSrcIsDHTML);
if (!startedDrag && dragState().m_dragSrcMayBeDHTML) {
// Drag was canned at the last minute - we owe m_dragSrc a DRAGEND event
dispatchDragSrcEvent(eventNames().dragendEvent, event.event());
m_mouseDownMayStartDrag = false;
}
}
cleanupDrag:
if (!m_mouseDownMayStartDrag) {
// something failed to start the drag, cleanup
freeClipboard();
dragState().m_dragSrc = 0;
}
// No more default handling (like selection), whether we're past the hysteresis bounds or not
return true;
}
#endif // ENABLE(DRAG_SUPPORT)
bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEvent, bool isLineBreak, bool isBackTab)
{
// Platforms should differentiate real commands like selectAll from text input in disguise (like insertNewline),
// and avoid dispatching text input events from keydown default handlers.
ASSERT(!underlyingEvent || !underlyingEvent->isKeyboardEvent() || static_cast<KeyboardEvent*>(underlyingEvent)->type() == eventNames().keypressEvent);
if (!m_frame)
return false;
EventTarget* target;
if (underlyingEvent)
target = underlyingEvent->target();
else
target = eventTargetNodeForDocument(m_frame->document());
if (!target)
return false;
if (FrameView* view = m_frame->view())
view->resetDeferredRepaintDelay();
RefPtr<TextEvent> event = TextEvent::create(m_frame->domWindow(), text);
event->setUnderlyingEvent(underlyingEvent);
event->setIsLineBreak(isLineBreak);
event->setIsBackTab(isBackTab);
ExceptionCode ec;
target->dispatchEvent(event, ec);
return event->defaultHandled();
}
#if !PLATFORM(MAC) && !PLATFORM(QT) && !PLATFORM(HAIKU)
bool EventHandler::invertSenseOfTabsToLinks(KeyboardEvent*) const
{
return false;
}
#endif
bool EventHandler::tabsToLinks(KeyboardEvent* event) const
{
Page* page = m_frame->page();
if (!page)
return false;
if (page->chrome()->client()->tabsToLinks())
return !invertSenseOfTabsToLinks(event);
return invertSenseOfTabsToLinks(event);
}
void EventHandler::defaultTextInputEventHandler(TextEvent* event)
{
String data = event->data();
if (data == "\n") {
if (event->isLineBreak()) {
if (m_frame->editor()->insertLineBreak())
event->setDefaultHandled();
} else {
if (m_frame->editor()->insertParagraphSeparator())
event->setDefaultHandled();
}
} else {
if (m_frame->editor()->insertTextWithoutSendingTextEvent(data, false, event))
event->setDefaultHandled();
}
}
#if PLATFORM(QT) || PLATFORM(MAC) || PLATFORM(ANDROID)
// These two platforms handle the space event in the platform-specific WebKit code.
// Eventually it would be good to eliminate that and use the code here instead, but
// the Qt version is inside an ifdef and the Mac version has some extra behavior
// so we can't unify everything yet.
void EventHandler::defaultSpaceEventHandler(KeyboardEvent*)
{
}
#else
void EventHandler::defaultSpaceEventHandler(KeyboardEvent* event)
{
ScrollDirection direction = event->shiftKey() ? ScrollUp : ScrollDown;
if (scrollOverflow(direction, ScrollByPage)) {
event->setDefaultHandled();
return;
}
FrameView* view = m_frame->view();
if (!view)
return;
if (view->scroll(direction, ScrollByPage))
event->setDefaultHandled();
}
#endif
void EventHandler::defaultTabEventHandler(KeyboardEvent* event)
{
// We should only advance focus on tabs if no special modifier keys are held down.
if (event->ctrlKey() || event->metaKey() || event->altGraphKey())
return;
Page* page = m_frame->page();
if (!page)
return;
if (!page->tabKeyCyclesThroughElements())
return;
FocusDirection focusDirection = event->shiftKey() ? FocusDirectionBackward : FocusDirectionForward;
// Tabs can be used in design mode editing.
if (m_frame->document()->inDesignMode())
return;
if (page->focusController()->advanceFocus(focusDirection, event))
event->setDefaultHandled();
}
void EventHandler::capsLockStateMayHaveChanged()
{
Document* d = m_frame->document();
if (Node* node = d->focusedNode()) {
if (RenderObject* r = node->renderer()) {
if (r->isTextField())
toRenderTextControlSingleLine(r)->capsLockStateMayHaveChanged();
}
}
}
void EventHandler::sendResizeEvent()
{
m_frame->document()->dispatchWindowEvent(Event::create(eventNames().resizeEvent, false, false));
}
void EventHandler::sendScrollEvent()
{
setFrameWasScrolledByUser();
if (m_frame->view())
m_frame->document()->dispatchEvent(Event::create(eventNames().scrollEvent, true, false));
}
void EventHandler::setFrameWasScrolledByUser()
{
FrameView* v = m_frame->view();
if (v)
v->setWasScrolledByUser(true);
}
bool EventHandler::passMousePressEventToScrollbar(MouseEventWithHitTestResults& mev, Scrollbar* scrollbar)
{
if (!scrollbar || !scrollbar->enabled())
return false;
setFrameWasScrolledByUser();
return scrollbar->mouseDown(mev.event());
}
// If scrollbar (under mouse) is different from last, send a mouse exited. Set
// last to scrollbar if setLast is true; else set last to 0.
void EventHandler::updateLastScrollbarUnderMouse(Scrollbar* scrollbar, bool setLast)
{
if (m_lastScrollbarUnderMouse != scrollbar) {
// Send mouse exited to the old scrollbar.
if (m_lastScrollbarUnderMouse)
m_lastScrollbarUnderMouse->mouseExited();
m_lastScrollbarUnderMouse = setLast ? scrollbar : 0;
}
}
#if ENABLE(TOUCH_EVENTS)
#if PLATFORM(ANDROID)
// TODO(benm): On Android we return an int back to Java to signify whether the default actions
// for longpress/doubletap in the Browser should be prevented. I think that before upstreaming
// to webkit.org we can refactor the Java side to not require this.
int EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
#else
bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
#endif
{
RefPtr<TouchList> touches = TouchList::create();
RefPtr<TouchList> pressedTouches = TouchList::create();
RefPtr<TouchList> releasedTouches = TouchList::create();
RefPtr<TouchList> movedTouches = TouchList::create();
RefPtr<TouchList> targetTouches = TouchList::create();
RefPtr<TouchList> cancelTouches = TouchList::create();
const Vector<PlatformTouchPoint>& points = event.touchPoints();
AtomicString* eventName = 0;
for (int i = 0; i < points.size(); ++i) {
const PlatformTouchPoint& point = points[i];
IntPoint pagePoint = documentPointForWindowPoint(m_frame, point.pos());
HitTestResult result = hitTestResultAtPoint(pagePoint, /*allowShadowContent*/ false);
Node* target = result.innerNode();
// Touch events should not go to text nodes
if (target && target->isTextNode())
target = target->parentNode();
Document* doc = target->document();
if (!doc)
continue;
if (!doc->hasListenerType(Document::TOUCH_LISTENER))
continue;
if (m_frame != doc->frame()) {
// pagePoint should always be relative to the target elements containing frame.
pagePoint = documentPointForWindowPoint(doc->frame(), point.pos());
}
int adjustedPageX = lroundf(pagePoint.x() / m_frame->pageZoomFactor());
int adjustedPageY = lroundf(pagePoint.y() / m_frame->pageZoomFactor());
if ((event.type() == TouchStart
#if PLATFORM(ANDROID)
|| event.type() == TouchDoubleTap
|| event.type() == TouchLongPress
#endif
) && !i) {
m_touchEventTarget = target;
m_firstTouchScreenPos = point.screenPos();
m_firstTouchPagePos = pagePoint;
}
// ANDROID
// The touch event should act on m_touchEventTarget, not target
// TODO: Upstream this fix to webkit.org
RefPtr<Touch> touch = Touch::create(doc->frame(), m_touchEventTarget.get(), point.id(),
point.screenPos().x(), point.screenPos().y(),
adjustedPageX, adjustedPageY);
if (point.state() == PlatformTouchPoint::TouchReleased)
releasedTouches->append(touch);
else if (point.state() == PlatformTouchPoint::TouchCancelled)
cancelTouches->append(touch);
else {
if (point.state() == PlatformTouchPoint::TouchPressed)
pressedTouches->append(touch);
else {
touches->append(touch);
if (m_touchEventTarget == target)
targetTouches->append(touch);
if (point.state() == PlatformTouchPoint::TouchMoved)
movedTouches->append(touch);
}
}
}
if (!m_touchEventTarget)
#if PLATFORM(ANDROID)
return 0;
#else
return false;
#endif
bool defaultPrevented = false;
#if PLATFORM(ANDROID)
// TODO (benm): We should be able to remove this prior to upstreaming once Java side refactorings to make
// preventDeault work better are complete.
bool longPressPrevented = false;
bool doubleTapPrevented = false;
#endif
if (event.type() == TouchCancel) {
eventName = &eventNames().touchcancelEvent;
RefPtr<TouchEvent> cancelEv =
TouchEvent::create(TouchList::create().get(), TouchList::create().get(), cancelTouches.get(),
*eventName, m_touchEventTarget->document()->defaultView(),
m_firstTouchScreenPos.x(), m_firstTouchScreenPos.y(),
m_firstTouchPagePos.x(), m_firstTouchPagePos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(),
event.metaKey());
#if PLATFORM(ANDROID)
cancelEv->setCreateTime(static_cast<DOMTimeStamp>(event.eventTime()));
#endif
ExceptionCode ec = 0;
m_touchEventTarget->dispatchEvent(cancelEv.get(), ec);
defaultPrevented |= cancelEv->defaultPrevented();
}
if (releasedTouches->length() > 0) {
eventName = &eventNames().touchendEvent;
RefPtr<TouchEvent> endEv =
TouchEvent::create(touches.get(), targetTouches.get(), releasedTouches.get(),
*eventName, m_touchEventTarget->document()->defaultView(),
m_firstTouchScreenPos.x(), m_firstTouchScreenPos.y(),
m_firstTouchPagePos.x(), m_firstTouchPagePos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(),
event.metaKey());
#if PLATFORM(ANDROID)
endEv->setCreateTime(static_cast<DOMTimeStamp>(event.eventTime()));
#endif
ExceptionCode ec = 0;
m_touchEventTarget->dispatchEvent(endEv.get(), ec);
#if PLATFORM(ANDROID)
defaultPrevented |= endEv->defaultPrevented();
#else
defaultPrevented = endEv->defaultPrevented();
#endif
}
if (pressedTouches->length() > 0) {
// Add pressed touchpoints to touches and targetTouches
for (int i = 0; i < pressedTouches->length(); ++i) {
touches->append(pressedTouches->item(i));
if (m_touchEventTarget == pressedTouches->item(i)->target())
targetTouches->append(pressedTouches->item(i));
}
#if PLATFORM(ANDROID)
if (event.type() == TouchLongPress) {
eventName = &eventNames().touchlongpressEvent;
RefPtr<TouchEvent> longpressEv =
TouchEvent::create(touches.get(), targetTouches.get(), pressedTouches.get(),
*eventName, m_touchEventTarget->document()->defaultView(),
m_firstTouchScreenPos.x(), m_firstTouchScreenPos.y(),
m_firstTouchPagePos.x(), m_firstTouchPagePos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(),
event.metaKey());
longpressEv->setCreateTime(static_cast<DOMTimeStamp>(event.eventTime()));
ExceptionCode ec = 0;
m_touchEventTarget->dispatchEvent(longpressEv.get(), ec);
defaultPrevented |= longpressEv->defaultPrevented();
} else if (event.type() == TouchDoubleTap) {
eventName = &eventNames().touchdoubletapEvent;
RefPtr<TouchEvent> doubleTapEv =
TouchEvent::create(touches.get(), targetTouches.get(), pressedTouches.get(),
*eventName, m_touchEventTarget->document()->defaultView(),
m_firstTouchScreenPos.x(), m_firstTouchScreenPos.y(),
m_firstTouchPagePos.x(), m_firstTouchPagePos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(),
event.metaKey());
doubleTapEv->setCreateTime(static_cast<DOMTimeStamp>(event.eventTime()));
ExceptionCode ec = 0;
m_touchEventTarget->dispatchEvent(doubleTapEv.get(), ec);
defaultPrevented |= doubleTapEv->defaultPrevented();
} else {
#endif
eventName = &eventNames().touchstartEvent;
RefPtr<TouchEvent> startEv =
TouchEvent::create(touches.get(), targetTouches.get(), pressedTouches.get(),
*eventName, m_touchEventTarget->document()->defaultView(),
m_firstTouchScreenPos.x(), m_firstTouchScreenPos.y(),
m_firstTouchPagePos.x(), m_firstTouchPagePos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(),
event.metaKey());
#if PLATFORM(ANDROID)
startEv->setCreateTime(static_cast<DOMTimeStamp>(event.eventTime()));
#endif
ExceptionCode ec = 0;
m_touchEventTarget->dispatchEvent(startEv.get(), ec);
defaultPrevented |= startEv->defaultPrevented();
#if PLATFORM(ANDROID)
longPressPrevented |= startEv->longPressPrevented();
doubleTapPrevented |= startEv->doubleTapPrevented();
}
#endif
}
if (movedTouches->length() > 0) {
eventName = &eventNames().touchmoveEvent;
RefPtr<TouchEvent> moveEv =
TouchEvent::create(touches.get(), targetTouches.get(), movedTouches.get(),
*eventName, m_touchEventTarget->document()->defaultView(),
m_firstTouchScreenPos.x(), m_firstTouchScreenPos.y(),
m_firstTouchPagePos.x(), m_firstTouchPagePos.y(),
event.ctrlKey(), event.altKey(), event.shiftKey(),
event.metaKey());
#if PLATFORM(ANDROID)
moveEv->setCreateTime(static_cast<DOMTimeStamp>(event.eventTime()));
#endif
ExceptionCode ec = 0;
m_touchEventTarget->dispatchEvent(moveEv.get(), ec);
defaultPrevented |= moveEv->defaultPrevented();
}
if (event.type() == TouchEnd || event.type() == TouchCancel)
m_touchEventTarget = 0;
#if PLATFORM(ANDROID)
// TODO (benm): We should be able to remove this prior to upstreaming once Java side refactorings to make
// preventDefault work better are complete.
if (event.type() == TouchLongPress || event.type() == TouchDoubleTap)
return 0;
return (defaultPrevented ? preventTouch : 0)
| (longPressPrevented ? preventLongPress : 0)
| (doubleTapPrevented ? preventDoubleTap : 0);
#else
return defaultPrevented;
#endif
}
#endif
}
|