Flutter Linux Embedder
fl_scrolling_manager_test.cc
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1 // Copyright 2013 The Flutter Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #include "flutter/shell/platform/linux/fl_scrolling_manager.h"
6 #include "flutter/shell/platform/embedder/test_utils/proc_table_replacement.h"
7 #include "flutter/shell/platform/linux/fl_engine_private.h"
8 
9 #include <cstring>
10 #include <vector>
11 
12 #include "gtest/gtest.h"
13 
14 // Disgusting hack but could not find any way to create a GdkDevice
15 struct _FakeGdkDevice {
16  GObject parent_instance;
17  gchar* name;
18  GdkInputSource source;
19 };
20 GdkDevice* makeFakeDevice(GdkInputSource source) {
21  _FakeGdkDevice* device =
22  static_cast<_FakeGdkDevice*>(g_malloc0(sizeof(_FakeGdkDevice)));
23  device->source = source;
24  // Bully the type checker
25  (reinterpret_cast<GTypeInstance*>(device))->g_class =
26  static_cast<GTypeClass*>(g_malloc0(sizeof(GTypeClass)));
27  (reinterpret_cast<GTypeInstance*>(device))->g_class->g_type = GDK_TYPE_DEVICE;
28  return reinterpret_cast<GdkDevice*>(device);
29 }
30 
31 TEST(FlScrollingManagerTest, DiscreteDirectional) {
32  g_autoptr(FlDartProject) project = fl_dart_project_new();
33  g_autoptr(FlEngine) engine = fl_engine_new(project);
34 
35  g_autoptr(GError) error = nullptr;
36  EXPECT_TRUE(fl_engine_start(engine, &error));
37  EXPECT_EQ(error, nullptr);
38 
39  std::vector<FlutterPointerEvent> pointer_events;
40  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
41  SendPointerEvent,
42  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
43  size_t events_count) {
44  for (size_t i = 0; i < events_count; i++) {
45  pointer_events.push_back(events[i]);
46  }
47 
48  return kSuccess;
49  }));
50 
51  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
52 
53  GdkDevice* mouse = makeFakeDevice(GDK_SOURCE_MOUSE);
54  GdkEventScroll* event =
55  reinterpret_cast<GdkEventScroll*>(gdk_event_new(GDK_SCROLL));
56  event->time = 1;
57  event->x = 4.0;
58  event->y = 8.0;
59  event->device = mouse;
60  event->direction = GDK_SCROLL_UP;
61  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
62  EXPECT_EQ(pointer_events.size(), 1u);
63  EXPECT_EQ(pointer_events[0].x, 4.0);
64  EXPECT_EQ(pointer_events[0].y, 8.0);
65  EXPECT_EQ(pointer_events[0].device_kind, kFlutterPointerDeviceKindMouse);
66  EXPECT_EQ(pointer_events[0].timestamp,
67  1000lu); // Milliseconds -> Microseconds
68  EXPECT_EQ(pointer_events[0].scroll_delta_x, 0);
69  EXPECT_EQ(pointer_events[0].scroll_delta_y, 53 * -1.0);
70  event->direction = GDK_SCROLL_DOWN;
71  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
72  EXPECT_EQ(pointer_events.size(), 2u);
73  EXPECT_EQ(pointer_events[1].x, 4.0);
74  EXPECT_EQ(pointer_events[1].y, 8.0);
75  EXPECT_EQ(pointer_events[1].device_kind, kFlutterPointerDeviceKindMouse);
76  EXPECT_EQ(pointer_events[1].timestamp,
77  1000lu); // Milliseconds -> Microseconds
78  EXPECT_EQ(pointer_events[1].scroll_delta_x, 0);
79  EXPECT_EQ(pointer_events[1].scroll_delta_y, 53 * 1.0);
80  event->direction = GDK_SCROLL_LEFT;
81  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
82  EXPECT_EQ(pointer_events.size(), 3u);
83  EXPECT_EQ(pointer_events[2].x, 4.0);
84  EXPECT_EQ(pointer_events[2].y, 8.0);
85  EXPECT_EQ(pointer_events[2].device_kind, kFlutterPointerDeviceKindMouse);
86  EXPECT_EQ(pointer_events[2].timestamp,
87  1000lu); // Milliseconds -> Microseconds
88  EXPECT_EQ(pointer_events[2].scroll_delta_x, 53 * -1.0);
89  EXPECT_EQ(pointer_events[2].scroll_delta_y, 0);
90  event->direction = GDK_SCROLL_RIGHT;
91  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
92  EXPECT_EQ(pointer_events.size(), 4u);
93  EXPECT_EQ(pointer_events[3].x, 4.0);
94  EXPECT_EQ(pointer_events[3].y, 8.0);
95  EXPECT_EQ(pointer_events[3].device_kind, kFlutterPointerDeviceKindMouse);
96  EXPECT_EQ(pointer_events[3].timestamp,
97  1000lu); // Milliseconds -> Microseconds
98  EXPECT_EQ(pointer_events[3].scroll_delta_x, 53 * 1.0);
99  EXPECT_EQ(pointer_events[3].scroll_delta_y, 0);
100 }
101 
102 TEST(FlScrollingManagerTest, DiscreteScrolling) {
103  g_autoptr(FlDartProject) project = fl_dart_project_new();
104  g_autoptr(FlEngine) engine = fl_engine_new(project);
105 
106  g_autoptr(GError) error = nullptr;
107  EXPECT_TRUE(fl_engine_start(engine, &error));
108  EXPECT_EQ(error, nullptr);
109 
110  std::vector<FlutterPointerEvent> pointer_events;
111  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
112  SendPointerEvent,
113  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
114  size_t events_count) {
115  for (size_t i = 0; i < events_count; i++) {
116  pointer_events.push_back(events[i]);
117  }
118 
119  return kSuccess;
120  }));
121 
122  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
123 
124  GdkDevice* mouse = makeFakeDevice(GDK_SOURCE_MOUSE);
125  GdkEventScroll* event =
126  reinterpret_cast<GdkEventScroll*>(gdk_event_new(GDK_SCROLL));
127  event->time = 1;
128  event->x = 4.0;
129  event->y = 8.0;
130  event->delta_x = 1.0;
131  event->delta_y = 2.0;
132  event->device = mouse;
133  event->direction = GDK_SCROLL_SMOOTH;
134  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
135  EXPECT_EQ(pointer_events.size(), 1u);
136  EXPECT_EQ(pointer_events[0].x, 4.0);
137  EXPECT_EQ(pointer_events[0].y, 8.0);
138  EXPECT_EQ(pointer_events[0].device_kind, kFlutterPointerDeviceKindMouse);
139  EXPECT_EQ(pointer_events[0].timestamp,
140  1000lu); // Milliseconds -> Microseconds
141  EXPECT_EQ(pointer_events[0].scroll_delta_x, 53 * 1.0);
142  EXPECT_EQ(pointer_events[0].scroll_delta_y, 53 * 2.0);
143 }
144 
145 TEST(FlScrollingManagerTest, Panning) {
146  g_autoptr(FlDartProject) project = fl_dart_project_new();
147  g_autoptr(FlEngine) engine = fl_engine_new(project);
148 
149  g_autoptr(GError) error = nullptr;
150  EXPECT_TRUE(fl_engine_start(engine, &error));
151  EXPECT_EQ(error, nullptr);
152 
153  std::vector<FlutterPointerEvent> pointer_events;
154  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
155  SendPointerEvent,
156  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
157  size_t events_count) {
158  for (size_t i = 0; i < events_count; i++) {
159  pointer_events.push_back(events[i]);
160  }
161 
162  return kSuccess;
163  }));
164 
165  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
166 
167  GdkDevice* touchpad = makeFakeDevice(GDK_SOURCE_TOUCHPAD);
168  GdkEventScroll* event =
169  reinterpret_cast<GdkEventScroll*>(gdk_event_new(GDK_SCROLL));
170  event->time = 1;
171  event->x = 4.0;
172  event->y = 8.0;
173  event->delta_x = 1.0;
174  event->delta_y = 2.0;
175  event->device = touchpad;
176  event->direction = GDK_SCROLL_SMOOTH;
177  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
178  EXPECT_EQ(pointer_events.size(), 2u);
179  EXPECT_EQ(pointer_events[0].x, 4.0);
180  EXPECT_EQ(pointer_events[0].y, 8.0);
181  EXPECT_EQ(pointer_events[0].timestamp,
182  1000lu); // Milliseconds -> Microseconds
183  EXPECT_EQ(pointer_events[0].phase, kPanZoomStart);
184  EXPECT_EQ(pointer_events[1].x, 4.0);
185  EXPECT_EQ(pointer_events[1].y, 8.0);
186  EXPECT_EQ(pointer_events[1].timestamp,
187  1000lu); // Milliseconds -> Microseconds
188  EXPECT_EQ(pointer_events[1].phase, kPanZoomUpdate);
189  EXPECT_EQ(pointer_events[1].pan_x, 53 * -1.0); // directions get swapped
190  EXPECT_EQ(pointer_events[1].pan_y, 53 * -2.0);
191  EXPECT_EQ(pointer_events[1].scale, 1.0);
192  EXPECT_EQ(pointer_events[1].rotation, 0.0);
193  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
194  EXPECT_EQ(pointer_events.size(), 3u);
195  EXPECT_EQ(pointer_events[2].x, 4.0);
196  EXPECT_EQ(pointer_events[2].y, 8.0);
197  EXPECT_EQ(pointer_events[2].timestamp,
198  1000lu); // Milliseconds -> Microseconds
199  EXPECT_EQ(pointer_events[2].phase, kPanZoomUpdate);
200  EXPECT_EQ(pointer_events[2].pan_x, 53 * -2.0); // directions get swapped
201  EXPECT_EQ(pointer_events[2].pan_y, 53 * -4.0);
202  EXPECT_EQ(pointer_events[2].scale, 1.0);
203  EXPECT_EQ(pointer_events[2].rotation, 0.0);
204  event->is_stop = true;
205  fl_scrolling_manager_handle_scroll_event(manager, event, 1.0);
206  EXPECT_EQ(pointer_events.size(), 4u);
207  EXPECT_EQ(pointer_events[3].x, 4.0);
208  EXPECT_EQ(pointer_events[3].y, 8.0);
209  EXPECT_EQ(pointer_events[3].timestamp,
210  1000lu); // Milliseconds -> Microseconds
211  EXPECT_EQ(pointer_events[3].phase, kPanZoomEnd);
212 }
213 
214 TEST(FlScrollingManagerTest, Zooming) {
215  g_autoptr(FlDartProject) project = fl_dart_project_new();
216  g_autoptr(FlEngine) engine = fl_engine_new(project);
217 
218  g_autoptr(GError) error = nullptr;
219  EXPECT_TRUE(fl_engine_start(engine, &error));
220  EXPECT_EQ(error, nullptr);
221 
222  std::vector<FlutterPointerEvent> pointer_events;
223  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
224  SendPointerEvent,
225  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
226  size_t events_count) {
227  for (size_t i = 0; i < events_count; i++) {
228  pointer_events.push_back(events[i]);
229  }
230 
231  return kSuccess;
232  }));
233 
234  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
235 
236  size_t time_start = g_get_real_time();
237  fl_scrolling_manager_handle_zoom_begin(manager);
238  EXPECT_EQ(pointer_events.size(), 1u);
239  EXPECT_EQ(pointer_events[0].x, 0);
240  EXPECT_EQ(pointer_events[0].y, 0);
241  EXPECT_EQ(pointer_events[0].phase, kPanZoomStart);
242  EXPECT_GE(pointer_events[0].timestamp, time_start);
243  fl_scrolling_manager_handle_zoom_update(manager, 1.1);
244  EXPECT_EQ(pointer_events.size(), 2u);
245  EXPECT_EQ(pointer_events[1].x, 0);
246  EXPECT_EQ(pointer_events[1].y, 0);
247  EXPECT_EQ(pointer_events[1].phase, kPanZoomUpdate);
248  EXPECT_GE(pointer_events[1].timestamp, pointer_events[0].timestamp);
249  EXPECT_EQ(pointer_events[1].pan_x, 0);
250  EXPECT_EQ(pointer_events[1].pan_y, 0);
251  EXPECT_EQ(pointer_events[1].scale, 1.1);
252  EXPECT_EQ(pointer_events[1].rotation, 0);
253  fl_scrolling_manager_handle_zoom_end(manager);
254  EXPECT_EQ(pointer_events.size(), 3u);
255  EXPECT_EQ(pointer_events[2].x, 0);
256  EXPECT_EQ(pointer_events[2].y, 0);
257  EXPECT_EQ(pointer_events[2].phase, kPanZoomEnd);
258  EXPECT_GE(pointer_events[2].timestamp, pointer_events[1].timestamp);
259 }
260 
261 TEST(FlScrollingManagerTest, Rotating) {
262  g_autoptr(FlDartProject) project = fl_dart_project_new();
263  g_autoptr(FlEngine) engine = fl_engine_new(project);
264 
265  g_autoptr(GError) error = nullptr;
266  EXPECT_TRUE(fl_engine_start(engine, &error));
267  EXPECT_EQ(error, nullptr);
268 
269  std::vector<FlutterPointerEvent> pointer_events;
270  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
271  SendPointerEvent,
272  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
273  size_t events_count) {
274  for (size_t i = 0; i < events_count; i++) {
275  pointer_events.push_back(events[i]);
276  }
277 
278  return kSuccess;
279  }));
280 
281  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
282 
283  size_t time_start = g_get_real_time();
284  fl_scrolling_manager_handle_rotation_begin(manager);
285  EXPECT_EQ(pointer_events.size(), 1u);
286  EXPECT_EQ(pointer_events[0].x, 0);
287  EXPECT_EQ(pointer_events[0].y, 0);
288  EXPECT_EQ(pointer_events[0].phase, kPanZoomStart);
289  EXPECT_GE(pointer_events[0].timestamp, time_start);
290  fl_scrolling_manager_handle_rotation_update(manager, 0.5);
291  EXPECT_EQ(pointer_events.size(), 2u);
292  EXPECT_EQ(pointer_events[1].x, 0);
293  EXPECT_EQ(pointer_events[1].y, 0);
294  EXPECT_EQ(pointer_events[1].phase, kPanZoomUpdate);
295  EXPECT_GE(pointer_events[1].timestamp, pointer_events[0].timestamp);
296  EXPECT_EQ(pointer_events[1].pan_x, 0);
297  EXPECT_EQ(pointer_events[1].pan_y, 0);
298  EXPECT_EQ(pointer_events[1].scale, 1.0);
299  EXPECT_EQ(pointer_events[1].rotation, 0.5);
300  fl_scrolling_manager_handle_rotation_end(manager);
301  EXPECT_EQ(pointer_events.size(), 3u);
302  EXPECT_EQ(pointer_events[2].x, 0);
303  EXPECT_EQ(pointer_events[2].y, 0);
304  EXPECT_EQ(pointer_events[2].phase, kPanZoomEnd);
305  EXPECT_GE(pointer_events[2].timestamp, pointer_events[1].timestamp);
306 }
307 
308 TEST(FlScrollingManagerTest, SynchronizedZoomingAndRotating) {
309  g_autoptr(FlDartProject) project = fl_dart_project_new();
310  g_autoptr(FlEngine) engine = fl_engine_new(project);
311 
312  g_autoptr(GError) error = nullptr;
313  EXPECT_TRUE(fl_engine_start(engine, &error));
314  EXPECT_EQ(error, nullptr);
315 
316  std::vector<FlutterPointerEvent> pointer_events;
317  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
318  SendPointerEvent,
319  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
320  size_t events_count) {
321  for (size_t i = 0; i < events_count; i++) {
322  pointer_events.push_back(events[i]);
323  }
324 
325  return kSuccess;
326  }));
327 
328  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
329 
330  size_t time_start = g_get_real_time();
331  fl_scrolling_manager_handle_zoom_begin(manager);
332  EXPECT_EQ(pointer_events.size(), 1u);
333  EXPECT_EQ(pointer_events[0].x, 0);
334  EXPECT_EQ(pointer_events[0].y, 0);
335  EXPECT_EQ(pointer_events[0].phase, kPanZoomStart);
336  EXPECT_GE(pointer_events[0].timestamp, time_start);
337  fl_scrolling_manager_handle_zoom_update(manager, 1.1);
338  EXPECT_EQ(pointer_events.size(), 2u);
339  EXPECT_EQ(pointer_events[1].x, 0);
340  EXPECT_EQ(pointer_events[1].y, 0);
341  EXPECT_EQ(pointer_events[1].phase, kPanZoomUpdate);
342  EXPECT_GE(pointer_events[1].timestamp, pointer_events[0].timestamp);
343  EXPECT_EQ(pointer_events[1].pan_x, 0);
344  EXPECT_EQ(pointer_events[1].pan_y, 0);
345  EXPECT_EQ(pointer_events[1].scale, 1.1);
346  EXPECT_EQ(pointer_events[1].rotation, 0);
347  fl_scrolling_manager_handle_rotation_begin(manager);
348  EXPECT_EQ(pointer_events.size(), 2u);
349  fl_scrolling_manager_handle_rotation_update(manager, 0.5);
350  EXPECT_EQ(pointer_events.size(), 3u);
351  EXPECT_EQ(pointer_events[2].x, 0);
352  EXPECT_EQ(pointer_events[2].y, 0);
353  EXPECT_EQ(pointer_events[2].phase, kPanZoomUpdate);
354  EXPECT_GE(pointer_events[2].timestamp, pointer_events[1].timestamp);
355  EXPECT_EQ(pointer_events[2].pan_x, 0);
356  EXPECT_EQ(pointer_events[2].pan_y, 0);
357  EXPECT_EQ(pointer_events[2].scale, 1.1);
358  EXPECT_EQ(pointer_events[2].rotation, 0.5);
359  fl_scrolling_manager_handle_zoom_end(manager);
360  // End event should only be sent after both zoom and rotate complete.
361  EXPECT_EQ(pointer_events.size(), 3u);
362  fl_scrolling_manager_handle_rotation_end(manager);
363  EXPECT_EQ(pointer_events.size(), 4u);
364  EXPECT_EQ(pointer_events[3].x, 0);
365  EXPECT_EQ(pointer_events[3].y, 0);
366  EXPECT_EQ(pointer_events[3].phase, kPanZoomEnd);
367  EXPECT_GE(pointer_events[3].timestamp, pointer_events[2].timestamp);
368 }
369 
370 // Make sure that zoom and rotate sequences which don't end at the same time
371 // don't cause any problems.
372 TEST(FlScrollingManagerTest, UnsynchronizedZoomingAndRotating) {
373  g_autoptr(FlDartProject) project = fl_dart_project_new();
374  g_autoptr(FlEngine) engine = fl_engine_new(project);
375 
376  g_autoptr(GError) error = nullptr;
377  EXPECT_TRUE(fl_engine_start(engine, &error));
378  EXPECT_EQ(error, nullptr);
379 
380  std::vector<FlutterPointerEvent> pointer_events;
381  fl_engine_get_embedder_api(engine)->SendPointerEvent = MOCK_ENGINE_PROC(
382  SendPointerEvent,
383  ([&pointer_events](auto engine, const FlutterPointerEvent* events,
384  size_t events_count) {
385  for (size_t i = 0; i < events_count; i++) {
386  pointer_events.push_back(events[i]);
387  }
388 
389  return kSuccess;
390  }));
391 
392  g_autoptr(FlScrollingManager) manager = fl_scrolling_manager_new(engine, 0);
393 
394  size_t time_start = g_get_real_time();
395  fl_scrolling_manager_handle_zoom_begin(manager);
396  EXPECT_EQ(pointer_events.size(), 1u);
397  EXPECT_EQ(pointer_events[0].x, 0);
398  EXPECT_EQ(pointer_events[0].y, 0);
399  EXPECT_EQ(pointer_events[0].phase, kPanZoomStart);
400  EXPECT_GE(pointer_events[0].timestamp, time_start);
401  fl_scrolling_manager_handle_zoom_update(manager, 1.1);
402  EXPECT_EQ(pointer_events.size(), 2u);
403  EXPECT_EQ(pointer_events[1].x, 0);
404  EXPECT_EQ(pointer_events[1].y, 0);
405  EXPECT_EQ(pointer_events[1].phase, kPanZoomUpdate);
406  EXPECT_GE(pointer_events[1].timestamp, pointer_events[0].timestamp);
407  EXPECT_EQ(pointer_events[1].pan_x, 0);
408  EXPECT_EQ(pointer_events[1].pan_y, 0);
409  EXPECT_EQ(pointer_events[1].scale, 1.1);
410  EXPECT_EQ(pointer_events[1].rotation, 0);
411  fl_scrolling_manager_handle_rotation_begin(manager);
412  EXPECT_EQ(pointer_events.size(), 2u);
413  fl_scrolling_manager_handle_rotation_update(manager, 0.5);
414  EXPECT_EQ(pointer_events.size(), 3u);
415  EXPECT_EQ(pointer_events[2].x, 0);
416  EXPECT_EQ(pointer_events[2].y, 0);
417  EXPECT_EQ(pointer_events[2].phase, kPanZoomUpdate);
418  EXPECT_GE(pointer_events[2].timestamp, pointer_events[1].timestamp);
419  EXPECT_EQ(pointer_events[2].pan_x, 0);
420  EXPECT_EQ(pointer_events[2].pan_y, 0);
421  EXPECT_EQ(pointer_events[2].scale, 1.1);
422  EXPECT_EQ(pointer_events[2].rotation, 0.5);
423  fl_scrolling_manager_handle_zoom_end(manager);
424  EXPECT_EQ(pointer_events.size(), 3u);
425  fl_scrolling_manager_handle_rotation_update(manager, 1.0);
426  EXPECT_EQ(pointer_events.size(), 4u);
427  EXPECT_EQ(pointer_events[3].x, 0);
428  EXPECT_EQ(pointer_events[3].y, 0);
429  EXPECT_EQ(pointer_events[3].phase, kPanZoomUpdate);
430  EXPECT_GE(pointer_events[3].timestamp, pointer_events[2].timestamp);
431  EXPECT_EQ(pointer_events[3].pan_x, 0);
432  EXPECT_EQ(pointer_events[3].pan_y, 0);
433  EXPECT_EQ(pointer_events[3].scale, 1.1);
434  EXPECT_EQ(pointer_events[3].rotation, 1.0);
435  fl_scrolling_manager_handle_rotation_end(manager);
436  EXPECT_EQ(pointer_events.size(), 5u);
437  EXPECT_EQ(pointer_events[4].x, 0);
438  EXPECT_EQ(pointer_events[4].y, 0);
439  EXPECT_EQ(pointer_events[4].phase, kPanZoomEnd);
440  EXPECT_GE(pointer_events[4].timestamp, pointer_events[3].timestamp);
441 }
_FakeGdkDevice
Definition: fl_scrolling_manager_test.cc:15
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Definition: fl_scrolling_manager.cc:235
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Definition: fl_scrolling_manager.cc:220
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fl_scrolling_manager_handle_zoom_begin
void fl_scrolling_manager_handle_zoom_begin(FlScrollingManager *self)
Definition: fl_scrolling_manager.cc:202