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
content / browser / android / gesture_listener_manager.cc [blame]
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include "base/memory/raw_ptr.h"
#include "content/browser/android/gesture_listener_manager.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/browser/web_contents/web_contents_view_android.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/web_contents_observer.h"
#include "third_party/blink/public/common/input/web_input_event.h"
#include "ui/events/android/gesture_event_type.h"
#include "ui/gfx/geometry/size_f.h"
// Must come after all headers that specialize FromJniType() / ToJniType().
#include "content/public/android/content_jni_headers/GestureListenerManagerImpl_jni.h"
using blink::WebGestureEvent;
using blink::WebInputEvent;
using base::android::AttachCurrentThread;
using base::android::JavaParamRef;
using base::android::ScopedJavaLocalRef;
namespace content {
namespace {
int ToGestureEventType(WebInputEvent::Type type) {
switch (type) {
case WebInputEvent::Type::kGestureScrollBegin:
return ui::GESTURE_EVENT_TYPE_SCROLL_START;
case WebInputEvent::Type::kGestureScrollEnd:
return ui::GESTURE_EVENT_TYPE_SCROLL_END;
case WebInputEvent::Type::kGestureScrollUpdate:
return ui::GESTURE_EVENT_TYPE_SCROLL_BY;
case WebInputEvent::Type::kGestureFlingStart:
return ui::GESTURE_EVENT_TYPE_FLING_START;
case WebInputEvent::Type::kGestureFlingCancel:
return ui::GESTURE_EVENT_TYPE_FLING_CANCEL;
case WebInputEvent::Type::kGestureShowPress:
return ui::GESTURE_EVENT_TYPE_SHOW_PRESS;
case WebInputEvent::Type::kGestureTap:
return ui::GESTURE_EVENT_TYPE_SINGLE_TAP_CONFIRMED;
case WebInputEvent::Type::kGestureTapUnconfirmed:
return ui::GESTURE_EVENT_TYPE_SINGLE_TAP_UNCONFIRMED;
case WebInputEvent::Type::kGestureTapDown:
return ui::GESTURE_EVENT_TYPE_TAP_DOWN;
case WebInputEvent::Type::kGestureTapCancel:
return ui::GESTURE_EVENT_TYPE_TAP_CANCEL;
case WebInputEvent::Type::kGestureDoubleTap:
return ui::GESTURE_EVENT_TYPE_DOUBLE_TAP;
case WebInputEvent::Type::kGestureLongPress:
return ui::GESTURE_EVENT_TYPE_LONG_PRESS;
case WebInputEvent::Type::kGestureLongTap:
return ui::GESTURE_EVENT_TYPE_LONG_TAP;
case WebInputEvent::Type::kGesturePinchBegin:
return ui::GESTURE_EVENT_TYPE_PINCH_BEGIN;
case WebInputEvent::Type::kGesturePinchEnd:
return ui::GESTURE_EVENT_TYPE_PINCH_END;
case WebInputEvent::Type::kGesturePinchUpdate:
return ui::GESTURE_EVENT_TYPE_PINCH_BY;
case WebInputEvent::Type::kGestureTwoFingerTap:
default:
NOTREACHED_IN_MIGRATION()
<< "Invalid source gesture type: " << WebInputEvent::GetName(type);
return -1;
}
}
} // namespace
// Reset scroll, hide popups on navigation finish/render process gone event.
class GestureListenerManager::ResetScrollObserver : public WebContentsObserver {
public:
ResetScrollObserver(WebContents* web_contents,
GestureListenerManager* manager);
ResetScrollObserver(const ResetScrollObserver&) = delete;
ResetScrollObserver& operator=(const ResetScrollObserver&) = delete;
void PrimaryPageChanged(Page& page) override;
void PrimaryMainFrameRenderProcessGone(
base::TerminationStatus status) override;
private:
const raw_ptr<GestureListenerManager> manager_;
};
GestureListenerManager::ResetScrollObserver::ResetScrollObserver(
WebContents* web_contents,
GestureListenerManager* manager)
: WebContentsObserver(web_contents), manager_(manager) {}
void GestureListenerManager::ResetScrollObserver::PrimaryPageChanged(Page&) {
manager_->OnPrimaryPageChanged();
}
void GestureListenerManager::ResetScrollObserver::
PrimaryMainFrameRenderProcessGone(base::TerminationStatus status) {
manager_->OnRenderProcessGone();
}
GestureListenerManager::GestureListenerManager(JNIEnv* env,
const JavaParamRef<jobject>& obj,
WebContentsImpl* web_contents)
: RenderWidgetHostConnector(web_contents),
WebContentsObserver(web_contents),
reset_scroll_observer_(new ResetScrollObserver(web_contents, this)),
web_contents_(web_contents),
java_ref_(env, obj) {
RenderFrameHost* host = web_contents->GetPrimaryMainFrame();
if (host) {
host->GetRenderWidgetHost()->AddInputEventObserver(this);
}
}
GestureListenerManager::~GestureListenerManager() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
if (j_obj.is_null())
return;
Java_GestureListenerManagerImpl_onNativeDestroyed(env, j_obj);
}
void GestureListenerManager::ResetGestureDetection(
JNIEnv* env,
const JavaParamRef<jobject>& obj) {
if (rwhva_)
rwhva_->ResetGestureDetection();
}
void GestureListenerManager::SetDoubleTapSupportEnabled(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jboolean enabled) {
if (rwhva_)
rwhva_->SetDoubleTapSupportEnabled(enabled);
}
void GestureListenerManager::SetMultiTouchZoomSupportEnabled(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
jboolean enabled) {
if (rwhva_)
rwhva_->SetMultiTouchZoomSupportEnabled(enabled);
}
void GestureListenerManager::SetRootScrollOffsetUpdateFrequency(
JNIEnv* env,
jint frequency) {
auto new_frequency =
static_cast<cc::mojom::RootScrollOffsetUpdateFrequency>(frequency);
root_scroll_offset_update_frequency_ = new_frequency;
if (rwhva_)
rwhva_->UpdateRootScrollOffsetUpdateFrequency();
}
void GestureListenerManager::RenderFrameHostChanged(RenderFrameHost* old_host,
RenderFrameHost* new_host) {
if (old_host && old_host->GetVisibilityState() ==
blink::mojom::PageVisibilityState::kHidden) {
old_host->GetRenderWidgetHost()->RemoveInputEventObserver(this);
}
if (new_host) {
new_host->GetRenderWidgetHost()->AddInputEventObserver(this);
}
}
void GestureListenerManager::OnInputEvent(const blink::WebInputEvent& event) {
const blink::mojom::EventType event_type = event.GetType();
if (WebInputEvent::IsTouchEventType(event_type)) {
if (event_type == blink::mojom::EventType::kTouchStart) {
active_pointers_++;
if (active_pointers_ == 1) {
UpdateOnTouchDown();
}
} else if (event_type == blink::mojom::EventType::kTouchCancel) {
active_pointers_ = 0;
} else if (event_type == blink::mojom::EventType::kTouchEnd) {
active_pointers_--;
DCHECK(active_pointers_ >= 0);
}
return;
}
if (event_type == blink::mojom::EventType::kGestureFlingStart) {
DCHECK(!is_in_a_fling_);
is_in_a_fling_ = true;
} else if (event_type == blink::mojom::EventType::kGestureFlingCancel ||
event_type == blink::mojom::EventType::kGestureScrollEnd) {
if (is_in_a_fling_) {
DidStopFlinging();
}
is_in_a_fling_ = false;
}
}
void GestureListenerManager::GestureEventAck(
const blink::WebGestureEvent& event,
blink::mojom::InputEventResultState ack_result) {
// This is called to fix crash happening while WebContents is being
// destroyed. See https://crbug.com/803244#c20
if (web_contents_->IsBeingDestroyed())
return;
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
if (j_obj.is_null())
return;
if (event.GetType() == blink::WebInputEvent::Type::kGestureScrollBegin) {
Java_GestureListenerManagerImpl_onScrollBegin(
env, j_obj, /*isDirectionUp*/ event.data.scroll_begin.delta_y_hint > 0);
return;
}
bool consumed = ack_result == blink::mojom::InputEventResultState::kConsumed;
if (event.GetType() == blink::WebInputEvent::Type::kGestureFlingStart &&
consumed) {
Java_GestureListenerManagerImpl_onFlingStart(
env, j_obj, /*isDirectionUp*/ event.data.scroll_begin.delta_y_hint > 0);
return;
}
Java_GestureListenerManagerImpl_onEventAck(
env, j_obj, static_cast<int>(event.GetType()), consumed);
}
void GestureListenerManager::OnInputEventAck(
blink::mojom::InputEventResultSource source,
blink::mojom::InputEventResultState state,
const blink::WebInputEvent& event) {
if (!WebInputEvent::IsGestureEventType(event.GetType())) {
return;
}
const blink::WebGestureEvent& gesture_event =
static_cast<const blink::WebGestureEvent&>(event);
GestureEventAck(gesture_event, state);
}
void GestureListenerManager::DidStopFlinging() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
if (j_obj.is_null())
return;
Java_GestureListenerManagerImpl_onFlingEnd(env, j_obj);
}
bool GestureListenerManager::FilterInputEvent(const WebInputEvent& event) {
if (event.GetType() != WebInputEvent::Type::kGestureTap &&
event.GetType() != WebInputEvent::Type::kGestureLongTap &&
event.GetType() != WebInputEvent::Type::kGestureLongPress &&
event.GetType() != WebInputEvent::Type::kMouseDown)
return false;
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> j_obj = java_ref_.get(env);
if (j_obj.is_null())
return false;
web_contents_->GetNativeView()->RequestFocus();
if (event.GetType() == WebInputEvent::Type::kMouseDown)
return false;
const WebGestureEvent& gesture = static_cast<const WebGestureEvent&>(event);
int gesture_type = ToGestureEventType(event.GetType());
float dip_scale = web_contents_->GetNativeView()->GetDipScale();
return Java_GestureListenerManagerImpl_filterTapOrPressEvent(
env, j_obj, gesture_type, gesture.PositionInWidget().x() * dip_scale,
gesture.PositionInWidget().y() * dip_scale);
}
// All positions and sizes (except |top_shown_pix|) are in CSS pixels.
// Note that viewport_width/height is a best effort based.
void GestureListenerManager::UpdateScrollInfo(const gfx::PointF& scroll_offset,
float page_scale_factor,
const float min_page_scale,
const float max_page_scale,
const gfx::SizeF& content,
const gfx::SizeF& viewport,
const float content_offset,
const float top_shown_pix,
bool top_changed) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
web_contents_->GetNativeView()->UpdateFrameInfo({viewport, content_offset});
Java_GestureListenerManagerImpl_updateScrollInfo(
env, obj, scroll_offset.x(), scroll_offset.y(), page_scale_factor,
min_page_scale, max_page_scale, content.width(), content.height(),
viewport.width(), viewport.height(), top_shown_pix, top_changed);
}
void GestureListenerManager::UpdateOnTouchDown() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_GestureListenerManagerImpl_updateOnTouchDown(env, obj);
}
void GestureListenerManager::OnRootScrollOffsetChanged(
const gfx::PointF& root_scroll_offset) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_GestureListenerManagerImpl_onRootScrollOffsetChanged(
env, obj, root_scroll_offset.x(), root_scroll_offset.y());
}
void GestureListenerManager::UpdateRenderProcessConnection(
RenderWidgetHostViewAndroid* old_rwhva,
RenderWidgetHostViewAndroid* new_rwhva) {
if (old_rwhva)
old_rwhva->SetGestureListenerManager(nullptr);
if (new_rwhva)
new_rwhva->SetGestureListenerManager(this);
rwhva_ = new_rwhva;
}
void GestureListenerManager::OnPrimaryPageChanged() {
ResetPopupsAndInput(false);
}
void GestureListenerManager::OnRenderProcessGone() {
ResetPopupsAndInput(true);
}
bool GestureListenerManager::IsScrollInProgressForTesting() {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return false;
return Java_GestureListenerManagerImpl_isScrollInProgress(env, obj);
}
void GestureListenerManager::ResetPopupsAndInput(bool render_process_gone) {
JNIEnv* env = AttachCurrentThread();
ScopedJavaLocalRef<jobject> obj = java_ref_.get(env);
if (obj.is_null())
return;
Java_GestureListenerManagerImpl_resetPopupsAndInput(env, obj,
render_process_gone);
}
jlong JNI_GestureListenerManagerImpl_Init(
JNIEnv* env,
const JavaParamRef<jobject>& obj,
const JavaParamRef<jobject>& jweb_contents) {
auto* web_contents = WebContents::FromJavaWebContents(jweb_contents);
CHECK(web_contents) << "Should be created with a valid WebContents.";
// Owns itself and gets destroyed when |WebContentsDestroyed| is called.
auto* manager = new GestureListenerManager(
env, obj, static_cast<WebContentsImpl*>(web_contents));
manager->Initialize();
return reinterpret_cast<intptr_t>(manager);
}
} // namespace content