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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "ui/events/gesture_detection/motion_event_buffer.h" | 5 #include "ui/events/gesture_detection/motion_event_buffer.h" |
| 6 | 6 |
| 7 #include "base/debug/trace_event.h" | 7 #include "base/debug/trace_event.h" |
| 8 #include "ui/events/gesture_detection/motion_event.h" | 8 #include "ui/events/gesture_detection/motion_event.h" |
| 9 #include "ui/events/gesture_detection/motion_event_generic.h" | 9 #include "ui/events/gesture_detection/motion_event_generic.h" |
| 10 | 10 |
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| 90 size_t pointer_index) { | 90 size_t pointer_index) { |
| 91 PointerProperties result; | 91 PointerProperties result; |
| 92 result.id = event.GetPointerId(pointer_index); | 92 result.id = event.GetPointerId(pointer_index); |
| 93 result.tool_type = event.GetToolType(pointer_index); | 93 result.tool_type = event.GetToolType(pointer_index); |
| 94 result.x = event.GetX(pointer_index); | 94 result.x = event.GetX(pointer_index); |
| 95 result.y = event.GetY(pointer_index); | 95 result.y = event.GetY(pointer_index); |
| 96 result.raw_x = event.GetRawX(pointer_index); | 96 result.raw_x = event.GetRawX(pointer_index); |
| 97 result.raw_y = event.GetRawY(pointer_index); | 97 result.raw_y = event.GetRawY(pointer_index); |
| 98 result.pressure = event.GetPressure(pointer_index); | 98 result.pressure = event.GetPressure(pointer_index); |
| 99 result.touch_major = event.GetTouchMajor(pointer_index); | 99 result.touch_major = event.GetTouchMajor(pointer_index); |
| 100 result.touch_minor = event.GetTouchMinor(pointer_index); | |
| 101 result.orientation = event.GetOrientation(pointer_index); | |
| 102 return result; | 100 return result; |
| 103 } | 101 } |
| 104 | 102 |
| 105 PointerProperties ResamplePointer(const MotionEvent& event0, | 103 PointerProperties ResamplePointer(const MotionEvent& event0, |
| 106 const MotionEvent& event1, | 104 const MotionEvent& event1, |
| 107 size_t event0_pointer_index, | 105 size_t event0_pointer_index, |
| 108 size_t event1_pointer_index, | 106 size_t event1_pointer_index, |
| 109 float alpha) { | 107 float alpha) { |
| 110 DCHECK_EQ(event0.GetPointerId(event0_pointer_index), | 108 DCHECK_EQ(event0.GetPointerId(event0_pointer_index), |
| 111 event1.GetPointerId(event1_pointer_index)); | 109 event1.GetPointerId(event1_pointer_index)); |
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| 169 // recent event used as the base event, and prior events used as the history. | 167 // recent event used as the base event, and prior events used as the history. |
| 170 class CompoundMotionEvent : public ui::MotionEvent { | 168 class CompoundMotionEvent : public ui::MotionEvent { |
| 171 public: | 169 public: |
| 172 explicit CompoundMotionEvent(MotionEventVector events) | 170 explicit CompoundMotionEvent(MotionEventVector events) |
| 173 : events_(events.Pass()) { | 171 : events_(events.Pass()) { |
| 174 DCHECK_GE(events_.size(), 1U); | 172 DCHECK_GE(events_.size(), 1U); |
| 175 } | 173 } |
| 176 virtual ~CompoundMotionEvent() {} | 174 virtual ~CompoundMotionEvent() {} |
| 177 | 175 |
| 178 virtual int GetId() const OVERRIDE { return latest().GetId(); } | 176 virtual int GetId() const OVERRIDE { return latest().GetId(); } |
| 179 | |
| 180 virtual Action GetAction() const OVERRIDE { return latest().GetAction(); } | 177 virtual Action GetAction() const OVERRIDE { return latest().GetAction(); } |
| 181 | |
| 182 virtual int GetActionIndex() const OVERRIDE { | 178 virtual int GetActionIndex() const OVERRIDE { |
| 183 return latest().GetActionIndex(); | 179 return latest().GetActionIndex(); |
| 184 } | 180 } |
| 185 | |
| 186 virtual size_t GetPointerCount() const OVERRIDE { | 181 virtual size_t GetPointerCount() const OVERRIDE { |
| 187 return latest().GetPointerCount(); | 182 return latest().GetPointerCount(); |
| 188 } | 183 } |
| 189 | |
| 190 virtual int GetPointerId(size_t pointer_index) const OVERRIDE { | 184 virtual int GetPointerId(size_t pointer_index) const OVERRIDE { |
| 191 return latest().GetPointerId(pointer_index); | 185 return latest().GetPointerId(pointer_index); |
| 192 } | 186 } |
| 193 | |
| 194 virtual float GetX(size_t pointer_index) const OVERRIDE { | 187 virtual float GetX(size_t pointer_index) const OVERRIDE { |
| 195 return latest().GetX(pointer_index); | 188 return latest().GetX(pointer_index); |
| 196 } | 189 } |
| 197 | |
| 198 virtual float GetY(size_t pointer_index) const OVERRIDE { | 190 virtual float GetY(size_t pointer_index) const OVERRIDE { |
| 199 return latest().GetY(pointer_index); | 191 return latest().GetY(pointer_index); |
| 200 } | 192 } |
| 201 | |
| 202 virtual float GetRawX(size_t pointer_index) const OVERRIDE { | 193 virtual float GetRawX(size_t pointer_index) const OVERRIDE { |
| 203 return latest().GetRawX(pointer_index); | 194 return latest().GetRawX(pointer_index); |
| 204 } | 195 } |
| 205 | |
| 206 virtual float GetRawY(size_t pointer_index) const OVERRIDE { | 196 virtual float GetRawY(size_t pointer_index) const OVERRIDE { |
| 207 return latest().GetRawY(pointer_index); | 197 return latest().GetRawY(pointer_index); |
| 208 } | 198 } |
| 209 | |
| 210 virtual float GetTouchMajor(size_t pointer_index) const OVERRIDE { | 199 virtual float GetTouchMajor(size_t pointer_index) const OVERRIDE { |
| 211 return latest().GetTouchMajor(pointer_index); | 200 return latest().GetTouchMajor(pointer_index); |
| 212 } | 201 } |
| 213 | |
| 214 virtual float GetTouchMinor(size_t pointer_index) const OVERRIDE { | |
| 215 return latest().GetTouchMinor(pointer_index); | |
| 216 } | |
| 217 | |
| 218 virtual float GetOrientation(size_t pointer_index) const OVERRIDE { | |
| 219 return latest().GetOrientation(pointer_index); | |
| 220 } | |
| 221 | |
| 222 virtual float GetPressure(size_t pointer_index) const OVERRIDE { | 202 virtual float GetPressure(size_t pointer_index) const OVERRIDE { |
| 223 return latest().GetPressure(pointer_index); | 203 return latest().GetPressure(pointer_index); |
| 224 } | 204 } |
| 225 | |
| 226 virtual ToolType GetToolType(size_t pointer_index) const OVERRIDE { | 205 virtual ToolType GetToolType(size_t pointer_index) const OVERRIDE { |
| 227 return latest().GetToolType(pointer_index); | 206 return latest().GetToolType(pointer_index); |
| 228 } | 207 } |
| 229 | |
| 230 virtual int GetButtonState() const OVERRIDE { | 208 virtual int GetButtonState() const OVERRIDE { |
| 231 return latest().GetButtonState(); | 209 return latest().GetButtonState(); |
| 232 } | 210 } |
| 233 | |
| 234 virtual base::TimeTicks GetEventTime() const OVERRIDE { | 211 virtual base::TimeTicks GetEventTime() const OVERRIDE { |
| 235 return latest().GetEventTime(); | 212 return latest().GetEventTime(); |
| 236 } | 213 } |
| 237 | |
| 238 virtual size_t GetHistorySize() const OVERRIDE { return events_.size() - 1; } | 214 virtual size_t GetHistorySize() const OVERRIDE { return events_.size() - 1; } |
| 239 | |
| 240 virtual base::TimeTicks GetHistoricalEventTime( | 215 virtual base::TimeTicks GetHistoricalEventTime( |
| 241 size_t historical_index) const OVERRIDE { | 216 size_t historical_index) const OVERRIDE { |
| 242 DCHECK_LT(historical_index, GetHistorySize()); | 217 DCHECK_LT(historical_index, GetHistorySize()); |
| 243 return events_[historical_index]->GetEventTime(); | 218 return events_[historical_index]->GetEventTime(); |
| 244 } | 219 } |
| 245 | |
| 246 virtual float GetHistoricalTouchMajor( | 220 virtual float GetHistoricalTouchMajor( |
| 247 size_t pointer_index, | 221 size_t pointer_index, |
| 248 size_t historical_index) const OVERRIDE { | 222 size_t historical_index) const OVERRIDE { |
| 249 DCHECK_LT(historical_index, GetHistorySize()); | 223 DCHECK_LT(historical_index, GetHistorySize()); |
| 250 return events_[historical_index]->GetTouchMajor(); | 224 return events_[historical_index]->GetTouchMajor(); |
| 251 } | 225 } |
| 252 | |
| 253 virtual float GetHistoricalX(size_t pointer_index, | 226 virtual float GetHistoricalX(size_t pointer_index, |
| 254 size_t historical_index) const OVERRIDE { | 227 size_t historical_index) const OVERRIDE { |
| 255 DCHECK_LT(historical_index, GetHistorySize()); | 228 DCHECK_LT(historical_index, GetHistorySize()); |
| 256 return events_[historical_index]->GetX(pointer_index); | 229 return events_[historical_index]->GetX(pointer_index); |
| 257 } | 230 } |
| 258 | |
| 259 virtual float GetHistoricalY(size_t pointer_index, | 231 virtual float GetHistoricalY(size_t pointer_index, |
| 260 size_t historical_index) const OVERRIDE { | 232 size_t historical_index) const OVERRIDE { |
| 261 DCHECK_LT(historical_index, GetHistorySize()); | 233 DCHECK_LT(historical_index, GetHistorySize()); |
| 262 return events_[historical_index]->GetY(pointer_index); | 234 return events_[historical_index]->GetY(pointer_index); |
| 263 } | 235 } |
| 264 | |
| 265 virtual scoped_ptr<MotionEvent> Clone() const OVERRIDE { | 236 virtual scoped_ptr<MotionEvent> Clone() const OVERRIDE { |
| 266 MotionEventVector cloned_events; | 237 MotionEventVector cloned_events; |
| 267 cloned_events.reserve(events_.size()); | 238 cloned_events.reserve(events_.size()); |
| 268 for (size_t i = 0; i < events_.size(); ++i) | 239 for (size_t i = 0; i < events_.size(); ++i) |
| 269 cloned_events.push_back(events_[i]->Clone().release()); | 240 cloned_events.push_back(events_[i]->Clone().release()); |
| 270 return scoped_ptr<MotionEvent>( | 241 return scoped_ptr<MotionEvent>( |
| 271 new CompoundMotionEvent(cloned_events.Pass())); | 242 new CompoundMotionEvent(cloned_events.Pass())); |
| 272 } | 243 } |
| 273 | |
| 274 virtual scoped_ptr<MotionEvent> Cancel() const OVERRIDE { | 244 virtual scoped_ptr<MotionEvent> Cancel() const OVERRIDE { |
| 275 return latest().Cancel(); | 245 return latest().Cancel(); |
| 276 } | 246 } |
| 277 | 247 |
| 278 // Returns the new, resampled event, or NULL if none was created. | 248 // Returns the new, resampled event, or NULL if none was created. |
| 279 // TODO(jdduke): Revisit resampling to handle cases where alternating frames | 249 // TODO(jdduke): Revisit resampling to handle cases where alternating frames |
| 280 // are resampled or resampling is otherwise inconsistent, e.g., a 90hz input | 250 // are resampled or resampling is otherwise inconsistent, e.g., a 90hz input |
| 281 // and 60hz frame signal could phase-align such that even frames yield an | 251 // and 60hz frame signal could phase-align such that even frames yield an |
| 282 // extrapolated event and odd frames are not resampled, crbug.com/399381. | 252 // extrapolated event and odd frames are not resampled, crbug.com/399381. |
| 283 const MotionEvent* TryResample(base::TimeTicks resample_time, | 253 const MotionEvent* TryResample(base::TimeTicks resample_time, |
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| 453 events.weak_clear(); | 423 events.weak_clear(); |
| 454 client_->ForwardMotionEvent(*event); | 424 client_->ForwardMotionEvent(*event); |
| 455 return; | 425 return; |
| 456 } | 426 } |
| 457 | 427 |
| 458 CompoundMotionEvent compound_event(events.Pass()); | 428 CompoundMotionEvent compound_event(events.Pass()); |
| 459 client_->ForwardMotionEvent(compound_event); | 429 client_->ForwardMotionEvent(compound_event); |
| 460 } | 430 } |
| 461 | 431 |
| 462 } // namespace ui | 432 } // namespace ui |
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