src/content/common/input/synthetic_web_input_event_builders.cc

   1 // Copyright 2013 The Chromium 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 "content/common/input/synthetic_web_input_event_builders.h"
   6
   7 #include "base/logging.h"
   8 #include "content/common/input/web_touch_event_traits.h"
   9 #include "ui/events/keycodes/keyboard_codes.h"
  10
  11 namespace content {
  12
  13 using blink::WebInputEvent;
  14 using blink::WebKeyboardEvent;
  15 using blink::WebGestureEvent;
  16 using blink::WebMouseEvent;
  17 using blink::WebMouseWheelEvent;
  18 using blink::WebTouchEvent;
  19 using blink::WebTouchPoint;
  20
  21 WebMouseEvent SyntheticWebMouseEventBuilder::Build(
  22     blink::WebInputEvent::Type type) {
  23   WebMouseEvent result;
  24   result.type = type;
  25   return result;
  26 }
  27
  28 WebMouseEvent SyntheticWebMouseEventBuilder::Build(
  29     blink::WebInputEvent::Type type,
  30     int window_x,
  31     int window_y,
  32     int modifiers) {
  33   DCHECK(WebInputEvent::isMouseEventType(type));
  34   WebMouseEvent result = Build(type);
  35   result.x = window_x;
  36   result.y = window_y;
  37   result.windowX = window_x;
  38   result.windowY = window_y;
  39   result.modifiers = modifiers;
  40
  41   if (type == WebInputEvent::MouseDown || type == WebInputEvent::MouseUp)
  42     result.button = WebMouseEvent::ButtonLeft;
  43   else
  44     result.button = WebMouseEvent::ButtonNone;
  45
  46   return result;
  47 }
  48
  49 WebMouseWheelEvent SyntheticWebMouseWheelEventBuilder::Build(
  50     WebMouseWheelEvent::Phase phase) {
  51   WebMouseWheelEvent result;
  52   result.type = WebInputEvent::MouseWheel;
  53   result.phase = phase;
  54   return result;
  55 }
  56
  57 WebMouseWheelEvent SyntheticWebMouseWheelEventBuilder::Build(float dx,
  58                                                              float dy,
  59                                                              int modifiers,
  60                                                              bool precise) {
  61   WebMouseWheelEvent result;
  62   result.type = WebInputEvent::MouseWheel;
  63   result.deltaX = dx;
  64   result.deltaY = dy;
  65   if (dx)
  66     result.wheelTicksX = dx > 0.0f ? 1.0f : -1.0f;
  67   if (dy)
  68     result.wheelTicksY = dy > 0.0f ? 1.0f : -1.0f;
  69   result.modifiers = modifiers;
  70   result.hasPreciseScrollingDeltas = precise;
  71   return result;
  72 }
  73
  74 WebKeyboardEvent SyntheticWebKeyboardEventBuilder::Build(
  75     WebInputEvent::Type type) {
  76   DCHECK(WebInputEvent::isKeyboardEventType(type));
  77   WebKeyboardEvent result;
  78   result.type = type;
  79   result.windowsKeyCode = ui::VKEY_L;  // non-null made up value.
  80   return result;
  81 }
  82
  83 WebGestureEvent SyntheticWebGestureEventBuilder::Build(
  84     WebInputEvent::Type type,
  85     WebGestureEvent::SourceDevice source_device) {
  86   DCHECK(WebInputEvent::isGestureEventType(type));
  87   WebGestureEvent result;
  88   result.type = type;
  89   result.sourceDevice = source_device;
  90   if (type == WebInputEvent::GestureTap ||
  91       type == WebInputEvent::GestureTapUnconfirmed ||
  92       type == WebInputEvent::GestureDoubleTap) {
  93     result.data.tap.tapCount = 1;
  94     result.data.tap.width = 10;
  95     result.data.tap.height = 10;
  96   }
  97   return result;
  98 }
  99
 100 WebGestureEvent SyntheticWebGestureEventBuilder::BuildScrollBegin(
 101     float dx_hint,
 102     float dy_hint) {
 103   WebGestureEvent result = Build(WebInputEvent::GestureScrollBegin,
 104                                  WebGestureEvent::Touchscreen);
 105   result.data.scrollBegin.deltaXHint = dx_hint;
 106   result.data.scrollBegin.deltaYHint = dy_hint;
 107   return result;
 108 }
 109
 110 WebGestureEvent SyntheticWebGestureEventBuilder::BuildScrollUpdate(
 111     float dx,
 112     float dy,
 113     int modifiers) {
 114   WebGestureEvent result = Build(WebInputEvent::GestureScrollUpdate,
 115                                  WebGestureEvent::Touchscreen);
 116   result.data.scrollUpdate.deltaX = dx;
 117   result.data.scrollUpdate.deltaY = dy;
 118   result.modifiers = modifiers;
 119   return result;
 120 }
 121
 122 WebGestureEvent SyntheticWebGestureEventBuilder::BuildPinchUpdate(
 123     float scale,
 124     float anchor_x,
 125     float anchor_y,
 126     int modifiers,
 127     WebGestureEvent::SourceDevice source_device) {
 128   WebGestureEvent result =
 129       Build(WebInputEvent::GesturePinchUpdate, source_device);
 130   result.data.pinchUpdate.scale = scale;
 131   result.x = anchor_x;
 132   result.y = anchor_y;
 133   result.globalX = anchor_x;
 134   result.globalY = anchor_y;
 135   result.modifiers = modifiers;
 136   return result;
 137 }
 138
 139 WebGestureEvent SyntheticWebGestureEventBuilder::BuildFling(
 140     float velocity_x,
 141     float velocity_y,
 142     WebGestureEvent::SourceDevice source_device) {
 143   WebGestureEvent result = Build(WebInputEvent::GestureFlingStart,
 144                                  source_device);
 145   result.data.flingStart.velocityX = velocity_x;
 146   result.data.flingStart.velocityY = velocity_y;
 147   return result;
 148 }
 149
 150 SyntheticWebTouchEvent::SyntheticWebTouchEvent() : WebTouchEvent() {}
 151
 152 void SyntheticWebTouchEvent::ResetPoints() {
 153   int point = 0;
 154   for (unsigned int i = 0; i < touchesLength; ++i) {
 155     if (touches[i].state == WebTouchPoint::StateReleased)
 156       continue;
 157
 158     touches[point] = touches[i];
 159     touches[point].state = WebTouchPoint::StateStationary;
 160     ++point;
 161   }
 162   touchesLength = point;
 163   type = WebInputEvent::Undefined;
 164 }
 165
 166 int SyntheticWebTouchEvent::PressPoint(float x, float y) {
 167   if (touchesLength == touchesLengthCap)
 168     return -1;
 169   WebTouchPoint& point = touches[touchesLength];
 170   point.id = touchesLength;
 171   point.position.x = point.screenPosition.x = x;
 172   point.position.y = point.screenPosition.y = y;
 173   point.state = WebTouchPoint::StatePressed;
 174   point.radiusX = point.radiusY = 1.f;
 175   ++touchesLength;
 176   WebTouchEventTraits::ResetType(
 177       WebInputEvent::TouchStart, timeStampSeconds, this);
 178   return point.id;
 179 }
 180
 181 void SyntheticWebTouchEvent::MovePoint(int index, float x, float y) {
 182   CHECK(index >= 0 && index < touchesLengthCap);
 183   WebTouchPoint& point = touches[index];
 184   point.position.x = point.screenPosition.x = x;
 185   point.position.y = point.screenPosition.y = y;
 186   touches[index].state = WebTouchPoint::StateMoved;
 187   WebTouchEventTraits::ResetType(
 188       WebInputEvent::TouchMove, timeStampSeconds, this);
 189 }
 190
 191 void SyntheticWebTouchEvent::ReleasePoint(int index) {
 192   CHECK(index >= 0 && index < touchesLengthCap);
 193   touches[index].state = WebTouchPoint::StateReleased;
 194   WebTouchEventTraits::ResetType(
 195       WebInputEvent::TouchEnd, timeStampSeconds, this);
 196 }
 197
 198 void SyntheticWebTouchEvent::CancelPoint(int index) {
 199   CHECK(index >= 0 && index < touchesLengthCap);
 200   touches[index].state = WebTouchPoint::StateCancelled;
 201   WebTouchEventTraits::ResetType(
 202       WebInputEvent::TouchCancel, timeStampSeconds, this);
 203 }
 204
 205 void SyntheticWebTouchEvent::SetTimestamp(base::TimeDelta timestamp) {
 206   timeStampSeconds = timestamp.InSecondsF();
 207 }
 208
 209 }  // namespace content