Framelet Prototype 2016

content/common/input/web_input_event_traits.cc

Index: content/common/input/web_input_event_traits.cc
diff --git a/content/common/input/web_input_event_traits.cc b/content/common/input/web_input_event_traits.cc
deleted file mode 100644
index 1008c549ef6909e60ff73a637efea217c6f11c4a..0000000000000000000000000000000000000000
--- a/content/common/input/web_input_event_traits.cc
+++ /dev/null
@@ -1,503 +0,0 @@
-// Copyright 2013 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "content/common/input/web_input_event_traits.h"
-
-#include <bitset>
-#include <limits>
-
-#include "base/logging.h"
-#include "base/strings/stringprintf.h"
-
-using base::StringAppendF;
-using base::SStringPrintf;
-using blink::WebGestureEvent;
-using blink::WebInputEvent;
-using blink::WebKeyboardEvent;
-using blink::WebMouseEvent;
-using blink::WebMouseWheelEvent;
-using blink::WebTouchEvent;
-using blink::WebTouchPoint;
-using std::numeric_limits;
-
-namespace content {
-namespace {
-
-const int kInvalidTouchIndex = -1;
-
-void ApppendEventDetails(const WebKeyboardEvent& event, std::string* result) {
-  StringAppendF(result,
-                "{\n WinCode: %d\n NativeCode: %d\n IsSystem: %d\n"
-                " Text: %s\n UnmodifiedText: %s\n KeyIdentifier: %s\n}",
-                event.windowsKeyCode,
-                event.nativeKeyCode,
-                event.isSystemKey,
-                reinterpret_cast<const char*>(event.text),
-                reinterpret_cast<const char*>(event.unmodifiedText),
-                reinterpret_cast<const char*>(event.keyIdentifier));
-}
-
-void ApppendEventDetails(const WebMouseEvent& event, std::string* result) {
-  StringAppendF(result,
-                "{\n Button: %d\n Pos: (%d, %d)\n WindowPos: (%d, %d)\n"
-                " GlobalPos: (%d, %d)\n Movement: (%d, %d)\n Clicks: %d\n}",
-                event.button,
-                event.x,
-                event.y,
-                event.windowX,
-                event.windowY,
-                event.globalX,
-                event.globalY,
-                event.movementX,
-                event.movementY,
-                event.clickCount);
-}
-
-void ApppendEventDetails(const WebMouseWheelEvent& event, std::string* result) {
-  StringAppendF(result,
-                "{\n Delta: (%f, %f)\n WheelTicks: (%f, %f)\n Accel: (%f, %f)\n"
-                " ScrollByPage: %d\n HasPreciseScrollingDeltas: %d\n"
-                " Phase: (%d, %d)\n CanRubberband: (%d, %d)\n CanScroll: %d\n}",
-                event.deltaX,
-                event.deltaY,
-                event.wheelTicksX,
-                event.wheelTicksY,
-                event.accelerationRatioX,
-                event.accelerationRatioY,
-                event.scrollByPage,
-                event.hasPreciseScrollingDeltas,
-                event.phase,
-                event.momentumPhase,
-                event.canRubberbandLeft,
-                event.canRubberbandRight,
-                event.canScroll);
-}
-
-void ApppendEventDetails(const WebGestureEvent& event, std::string* result) {
-  StringAppendF(result,
-                "{\n Pos: (%d, %d)\n GlobalPos: (%d, %d)\n SourceDevice: %d\n"
-                " RawData: (%f, %f, %f, %f, %d)\n}",
-                event.x,
-                event.y,
-                event.globalX,
-                event.globalY,
-                event.sourceDevice,
-                event.data.scrollUpdate.deltaX,
-                event.data.scrollUpdate.deltaY,
-                event.data.scrollUpdate.velocityX,
-                event.data.scrollUpdate.velocityY,
-                event.data.scrollUpdate.previousUpdateInSequencePrevented);
-}
-
-void ApppendTouchPointDetails(const WebTouchPoint& point, std::string* result) {
-  StringAppendF(result,
-                 "  (ID: %d, State: %d, ScreenPos: (%f, %f), Pos: (%f, %f),"
-                     " Radius: (%f, %f), Rot: %f, Force: %f,"
-                     " Tilt: (%d, %d)),\n",
-  point.id,
-  point.state,
-  point.screenPosition.x,
-  point.screenPosition.y,
-  point.position.x,
-  point.position.y,
-  point.radiusX,
-  point.radiusY,
-  point.rotationAngle,
-  point.force,
-  point.tiltX,
-  point.tiltY);
-}
-
-void ApppendEventDetails(const WebTouchEvent& event, std::string* result) {
-  StringAppendF(result,
-                "{\n Touches: %u, Cancelable: %d, CausesScrolling: %d,"
-                " uniqueTouchEventId: %u\n[\n",
-                event.touchesLength, event.cancelable,
-                event.causesScrollingIfUncanceled, event.uniqueTouchEventId);
-  for (unsigned i = 0; i < event.touchesLength; ++i)
-    ApppendTouchPointDetails(event.touches[i], result);
-  result->append(" ]\n}");
-}
-
-bool CanCoalesce(const WebKeyboardEvent& event_to_coalesce,
-                 const WebKeyboardEvent& event) {
-  return false;
-}
-
-void Coalesce(const WebKeyboardEvent& event_to_coalesce,
-              WebKeyboardEvent* event) {
-  DCHECK(CanCoalesce(event_to_coalesce, *event));
-}
-
-bool CanCoalesce(const WebMouseEvent& event_to_coalesce,
-                 const WebMouseEvent& event) {
-  return event.type == event_to_coalesce.type &&
-         event.type == WebInputEvent::MouseMove;
-}
-
-void Coalesce(const WebMouseEvent& event_to_coalesce, WebMouseEvent* event) {
-  DCHECK(CanCoalesce(event_to_coalesce, *event));
-  // Accumulate movement deltas.
-  int x = event->movementX;
-  int y = event->movementY;
-  *event = event_to_coalesce;
-  event->movementX += x;
-  event->movementY += y;
-}
-
-bool CanCoalesce(const WebMouseWheelEvent& event_to_coalesce,
-                 const WebMouseWheelEvent& event) {
-  return event.modifiers == event_to_coalesce.modifiers &&
-         event.scrollByPage == event_to_coalesce.scrollByPage &&
-         event.phase == event_to_coalesce.phase &&
-         event.momentumPhase == event_to_coalesce.momentumPhase &&
-         event.hasPreciseScrollingDeltas ==
-             event_to_coalesce.hasPreciseScrollingDeltas &&
-         event.canScroll == event_to_coalesce.canScroll;
-}
-
-float GetUnacceleratedDelta(float accelerated_delta, float acceleration_ratio) {
-  return accelerated_delta * acceleration_ratio;
-}
-
-float GetAccelerationRatio(float accelerated_delta, float unaccelerated_delta) {
-  if (unaccelerated_delta == 0.f || accelerated_delta == 0.f)
-    return 1.f;
-  return unaccelerated_delta / accelerated_delta;
-}
-
-void Coalesce(const WebMouseWheelEvent& event_to_coalesce,
-              WebMouseWheelEvent* event) {
-  DCHECK(CanCoalesce(event_to_coalesce, *event));
-  float unaccelerated_x =
-      GetUnacceleratedDelta(event->deltaX,
-                            event->accelerationRatioX) +
-      GetUnacceleratedDelta(event_to_coalesce.deltaX,
-                            event_to_coalesce.accelerationRatioX);
-  float unaccelerated_y =
-      GetUnacceleratedDelta(event->deltaY,
-                            event->accelerationRatioY) +
-      GetUnacceleratedDelta(event_to_coalesce.deltaY,
-                            event_to_coalesce.accelerationRatioY);
-  event->deltaX += event_to_coalesce.deltaX;
-  event->deltaY += event_to_coalesce.deltaY;
-  event->wheelTicksX += event_to_coalesce.wheelTicksX;
-  event->wheelTicksY += event_to_coalesce.wheelTicksY;
-  event->accelerationRatioX =
-      GetAccelerationRatio(event->deltaX, unaccelerated_x);
-  event->accelerationRatioY =
-      GetAccelerationRatio(event->deltaY, unaccelerated_y);
-}
-
-// Returns |kInvalidTouchIndex| iff |event| lacks a touch with an ID of |id|.
-int GetIndexOfTouchID(const WebTouchEvent& event, int id) {
-  for (unsigned i = 0; i < event.touchesLength; ++i) {
-    if (event.touches[i].id == id)
-      return i;
-  }
-  return kInvalidTouchIndex;
-}
-
-bool CanCoalesce(const WebTouchEvent& event_to_coalesce,
-                 const WebTouchEvent& event) {
-  if (event.type != event_to_coalesce.type ||
-      event.type != WebInputEvent::TouchMove ||
-      event.modifiers != event_to_coalesce.modifiers ||
-      event.touchesLength != event_to_coalesce.touchesLength ||
-      event.touchesLength > WebTouchEvent::touchesLengthCap)
-    return false;
-
-  static_assert(WebTouchEvent::touchesLengthCap <= sizeof(int32_t) * 8U,
-                "suboptimal touchesLengthCap size");
-  // Ensure that we have a 1-to-1 mapping of pointer ids between touches.
-  std::bitset<WebTouchEvent::touchesLengthCap> unmatched_event_touches(
-      (1 << event.touchesLength) - 1);
-  for (unsigned i = 0; i < event_to_coalesce.touchesLength; ++i) {
-    int event_touch_index =
-        GetIndexOfTouchID(event, event_to_coalesce.touches[i].id);
-    if (event_touch_index == kInvalidTouchIndex)
-      return false;
-    if (!unmatched_event_touches[event_touch_index])
-      return false;
-    unmatched_event_touches[event_touch_index] = false;
-  }
-  return unmatched_event_touches.none();
-}
-
-void Coalesce(const WebTouchEvent& event_to_coalesce, WebTouchEvent* event) {
-  DCHECK(CanCoalesce(event_to_coalesce, *event));
-  // The WebTouchPoints include absolute position information. So it is
-  // sufficient to simply replace the previous event with the new event->
-  // However, it is necessary to make sure that all the points have the
-  // correct state, i.e. the touch-points that moved in the last event, but
-  // didn't change in the current event, will have Stationary state. It is
-  // necessary to change them back to Moved state.
-  WebTouchEvent old_event = *event;
-  *event = event_to_coalesce;
-  for (unsigned i = 0; i < event->touchesLength; ++i) {
-    int i_old = GetIndexOfTouchID(old_event, event->touches[i].id);
-    if (old_event.touches[i_old].state == blink::WebTouchPoint::StateMoved)
-      event->touches[i].state = blink::WebTouchPoint::StateMoved;
-  }
-  event->causesScrollingIfUncanceled |= old_event.causesScrollingIfUncanceled;
-}
-
-bool CanCoalesce(const WebGestureEvent& event_to_coalesce,
-                 const WebGestureEvent& event) {
-  if (event.type != event_to_coalesce.type ||
-      event.sourceDevice != event_to_coalesce.sourceDevice ||
-      event.modifiers != event_to_coalesce.modifiers)
-    return false;
-
-  if (event.type == WebInputEvent::GestureScrollUpdate)
-    return true;
-
-  // GesturePinchUpdate scales can be combined only if they share a focal point,
-  // e.g., with double-tap drag zoom.
-  if (event.type == WebInputEvent::GesturePinchUpdate &&
-      event.x == event_to_coalesce.x &&
-      event.y == event_to_coalesce.y)
-    return true;
-
-  return false;
-}
-
-void Coalesce(const WebGestureEvent& event_to_coalesce,
-              WebGestureEvent* event) {
-  DCHECK(CanCoalesce(event_to_coalesce, *event));
-  if (event->type == WebInputEvent::GestureScrollUpdate) {
-    event->data.scrollUpdate.deltaX +=
-        event_to_coalesce.data.scrollUpdate.deltaX;
-    event->data.scrollUpdate.deltaY +=
-        event_to_coalesce.data.scrollUpdate.deltaY;
-    DCHECK_EQ(
-        event->data.scrollUpdate.previousUpdateInSequencePrevented,
-        event_to_coalesce.data.scrollUpdate.previousUpdateInSequencePrevented);
-  } else if (event->type == WebInputEvent::GesturePinchUpdate) {
-    event->data.pinchUpdate.scale *= event_to_coalesce.data.pinchUpdate.scale;
-    // Ensure the scale remains bounded above 0 and below Infinity so that
-    // we can reliably perform operations like log on the values.
-    if (event->data.pinchUpdate.scale < numeric_limits<float>::min())
-      event->data.pinchUpdate.scale = numeric_limits<float>::min();
-    else if (event->data.pinchUpdate.scale > numeric_limits<float>::max())
-      event->data.pinchUpdate.scale = numeric_limits<float>::max();
-  }
-}
-
-struct WebInputEventToString {
-  template <class EventType>
-  bool Execute(const WebInputEvent& event, std::string* result) const {
-    SStringPrintf(result, "%s (Time: %lf, Modifiers: %d)\n",
-                  WebInputEventTraits::GetName(event.type),
-                  event.timeStampSeconds,
-                  event.modifiers);
-    const EventType& typed_event = static_cast<const EventType&>(event);
-    ApppendEventDetails(typed_event, result);
-    return true;
-  }
-};
-
-struct WebInputEventSize {
-  template <class EventType>
-  bool Execute(WebInputEvent::Type /* type */, size_t* type_size) const {
-    *type_size = sizeof(EventType);
-    return true;
-  }
-};
-
-struct WebInputEventClone {
-  template <class EventType>
-  bool Execute(const WebInputEvent& event,
-               ScopedWebInputEvent* scoped_event) const {
-    DCHECK_EQ(sizeof(EventType), event.size);
-    *scoped_event = ScopedWebInputEvent(
-        new EventType(static_cast<const EventType&>(event)));
-    return true;
-  }
-};
-
-struct WebInputEventDelete {
-  template <class EventType>
-  bool Execute(WebInputEvent* event, bool* /* dummy_var */) const {
-    if (!event)
-      return false;
-    DCHECK_EQ(sizeof(EventType), event->size);
-    delete static_cast<EventType*>(event);
-    return true;
-  }
-};
-
-struct WebInputEventCanCoalesce {
-  template <class EventType>
-  bool Execute(const WebInputEvent& event_to_coalesce,
-               const WebInputEvent* event) const {
-    if (event_to_coalesce.type != event->type)
-      return false;
-    DCHECK_EQ(sizeof(EventType), event->size);
-    DCHECK_EQ(sizeof(EventType), event_to_coalesce.size);
-    return CanCoalesce(static_cast<const EventType&>(event_to_coalesce),
-                       *static_cast<const EventType*>(event));
-  }
-};
-
-struct WebInputEventCoalesce {
-  template <class EventType>
-  bool Execute(const WebInputEvent& event_to_coalesce,
-               WebInputEvent* event) const {
-    // New events get coalesced into older events, and the newer timestamp
-    // should always be preserved.
-    const double time_stamp_seconds = event_to_coalesce.timeStampSeconds;
-    Coalesce(static_cast<const EventType&>(event_to_coalesce),
-             static_cast<EventType*>(event));
-    event->timeStampSeconds = time_stamp_seconds;
-    return true;
-  }
-};
-
-template <typename Operator, typename ArgIn, typename ArgOut>
-bool Apply(Operator op,
-           WebInputEvent::Type type,
-           const ArgIn& arg_in,
-           ArgOut* arg_out) {
-  if (WebInputEvent::isMouseEventType(type))
-    return op.template Execute<WebMouseEvent>(arg_in, arg_out);
-  else if (type == WebInputEvent::MouseWheel)
-    return op.template Execute<WebMouseWheelEvent>(arg_in, arg_out);
-  else if (WebInputEvent::isKeyboardEventType(type))
-    return op.template Execute<WebKeyboardEvent>(arg_in, arg_out);
-  else if (WebInputEvent::isTouchEventType(type))
-    return op.template Execute<WebTouchEvent>(arg_in, arg_out);
-  else if (WebInputEvent::isGestureEventType(type))
-    return op.template Execute<WebGestureEvent>(arg_in, arg_out);
-
-  NOTREACHED() << "Unknown webkit event type " << type;
-  return false;
-}
-
-}  // namespace
-
-const char* WebInputEventTraits::GetName(WebInputEvent::Type type) {
-#define CASE_TYPE(t) case WebInputEvent::t:  return #t
-  switch(type) {
-    CASE_TYPE(Undefined);
-    CASE_TYPE(MouseDown);
-    CASE_TYPE(MouseUp);
-    CASE_TYPE(MouseMove);
-    CASE_TYPE(MouseEnter);
-    CASE_TYPE(MouseLeave);
-    CASE_TYPE(ContextMenu);
-    CASE_TYPE(MouseWheel);
-    CASE_TYPE(RawKeyDown);
-    CASE_TYPE(KeyDown);
-    CASE_TYPE(KeyUp);
-    CASE_TYPE(Char);
-    CASE_TYPE(GestureScrollBegin);
-    CASE_TYPE(GestureScrollEnd);
-    CASE_TYPE(GestureScrollUpdate);
-    CASE_TYPE(GestureFlingStart);
-    CASE_TYPE(GestureFlingCancel);
-    CASE_TYPE(GestureShowPress);
-    CASE_TYPE(GestureTap);
-    CASE_TYPE(GestureTapUnconfirmed);
-    CASE_TYPE(GestureTapDown);
-    CASE_TYPE(GestureTapCancel);
-    CASE_TYPE(GestureDoubleTap);
-    CASE_TYPE(GestureTwoFingerTap);
-    CASE_TYPE(GestureLongPress);
-    CASE_TYPE(GestureLongTap);
-    CASE_TYPE(GesturePinchBegin);
-    CASE_TYPE(GesturePinchEnd);
-    CASE_TYPE(GesturePinchUpdate);
-    CASE_TYPE(TouchStart);
-    CASE_TYPE(TouchMove);
-    CASE_TYPE(TouchEnd);
-    CASE_TYPE(TouchCancel);
-    default:
-      // Must include default to let blink::WebInputEvent add new event types
-      // before they're added here.
-      DLOG(WARNING) <<
-          "Unhandled WebInputEvent type in WebInputEventTraits::GetName.\n";
-      break;
-  }
-#undef CASE_TYPE
-  return "";
-}
-
-std::string WebInputEventTraits::ToString(const WebInputEvent& event) {
-  std::string result;
-  Apply(WebInputEventToString(), event.type, event, &result);
-  return result;
-}
-
-size_t WebInputEventTraits::GetSize(WebInputEvent::Type type) {
-  size_t size = 0;
-  Apply(WebInputEventSize(), type, type, &size);
-  return size;
-}
-
-ScopedWebInputEvent WebInputEventTraits::Clone(const WebInputEvent& event) {
-  ScopedWebInputEvent scoped_event;
-  Apply(WebInputEventClone(), event.type, event, &scoped_event);
-  return scoped_event;
-}
-
-void WebInputEventTraits::Delete(WebInputEvent* event) {
-  if (!event)
-    return;
-  bool dummy_var = false;
-  Apply(WebInputEventDelete(), event->type, event, &dummy_var);
-}
-
-bool WebInputEventTraits::CanCoalesce(const WebInputEvent& event_to_coalesce,
-                                      const WebInputEvent& event) {
-  // Early out before casting.
-  if (event_to_coalesce.type != event.type)
-    return false;
-  return Apply(WebInputEventCanCoalesce(),
-               event.type,
-               event_to_coalesce,
-               &event);
-}
-
-void WebInputEventTraits::Coalesce(const WebInputEvent& event_to_coalesce,
-                                   WebInputEvent* event) {
-  DCHECK(event);
-  Apply(WebInputEventCoalesce(), event->type, event_to_coalesce, event);
-}
-
-bool WebInputEventTraits::WillReceiveAckFromRenderer(
-    const WebInputEvent& event) {
-  switch (event.type) {
-    case WebInputEvent::MouseDown:
-    case WebInputEvent::MouseUp:
-    case WebInputEvent::MouseEnter:
-    case WebInputEvent::MouseLeave:
-    case WebInputEvent::ContextMenu:
-    case WebInputEvent::GestureScrollBegin:
-    case WebInputEvent::GestureScrollEnd:
-    case WebInputEvent::GestureShowPress:
-    case WebInputEvent::GestureTapUnconfirmed:
-    case WebInputEvent::GestureTapDown:
-    case WebInputEvent::GestureTapCancel:
-    case WebInputEvent::GesturePinchBegin:
-    case WebInputEvent::GesturePinchEnd:
-    case WebInputEvent::TouchCancel:
-      return false;
-    case WebInputEvent::TouchStart:
-    case WebInputEvent::TouchEnd:
-      return static_cast<const WebTouchEvent&>(event).cancelable;
-    default:
-      return true;
-  }
-}
-
-uint32_t WebInputEventTraits::GetUniqueTouchEventId(
-    const WebInputEvent& event) {
-  if (WebInputEvent::isTouchEventType(event.type)) {
-    return static_cast<const WebTouchEvent&>(event).uniqueTouchEventId;
-  }
-  return 0U;
-}
-
-}  // namespace content