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// Copyright (c) 2012 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/browser/renderer_host/tap_suppression_controller.h"
#include "base/command_line.h"
#include "base/debug/trace_event.h"
#include "base/logging.h"
#include "base/string_number_conversions.h"
#include "content/browser/renderer_host/render_widget_host_impl.h"
#include "content/public/common/content_switches.h"
#include "ui/base/gestures/gesture_configuration.h"
namespace content {
TapSuppressionController::TapSuppressionController(RenderWidgetHostImpl* rwhv)
: render_widget_host_(rwhv),
state_(TapSuppressionController::NOTHING) {
}
TapSuppressionController::~TapSuppressionController() { }
bool TapSuppressionController::ShouldSuppressMouseUp() {
switch (state_) {
case NOTHING:
case GFC_IN_PROGRESS:
return false;
case MD_STASHED:
state_ = NOTHING;
mouse_down_timer_.Stop();
return true;
case LAST_CANCEL_STOPPED_FLING:
NOTREACHED() << "Invalid MouseUp on LAST_CANCEL_STOPPED_FLING state";
}
return false;
}
bool TapSuppressionController::ShouldDeferMouseDown(
const WebKit::WebMouseEvent& event) {
switch (state_) {
case NOTHING:
return false;
case GFC_IN_PROGRESS:
mouse_down_timer_.Start(
FROM_HERE,
base::TimeDelta::FromMilliseconds(
ui::GestureConfiguration::fling_max_tap_gap_time_in_ms()),
this,
&TapSuppressionController::MouseDownTimerExpired);
stashed_mouse_down_ = event;
state_ = MD_STASHED;
return true;
case MD_STASHED:
NOTREACHED() << "MouseDown on MD_STASHED state";
state_ = NOTHING;
return false;
case LAST_CANCEL_STOPPED_FLING:
if ((base::TimeTicks::Now() - fling_cancel_time_).InMilliseconds()
< ui::GestureConfiguration::fling_max_cancel_to_down_time_in_ms()) {
state_ = MD_STASHED;
mouse_down_timer_.Start(
FROM_HERE,
base::TimeDelta::FromMilliseconds(
ui::GestureConfiguration::fling_max_tap_gap_time_in_ms()),
this,
&TapSuppressionController::MouseDownTimerExpired);
stashed_mouse_down_ = event;
return true;
} else {
state_ = NOTHING;
return false;
}
}
return false;
}
void TapSuppressionController::GestureFlingCancelAck(bool processed) {
switch (state_) {
case NOTHING:
NOTREACHED() << "GFC_Ack without a GFC";
break;
case GFC_IN_PROGRESS:
if (processed)
fling_cancel_time_ = base::TimeTicks::Now();
state_ = LAST_CANCEL_STOPPED_FLING;
break;
case MD_STASHED:
if (!processed) {
TRACE_EVENT0("browser",
"TapSuppressionController::GestureFlingCancelAck");
mouse_down_timer_.Stop();
render_widget_host_->ForwardMouseEventImmediately(stashed_mouse_down_);
state_ = NOTHING;
} // Else waiting for the timer to release the mouse event.
break;
case LAST_CANCEL_STOPPED_FLING:
break;
}
}
void TapSuppressionController::GestureFlingCancel(double cancel_time) {
switch (state_) {
case NOTHING:
case GFC_IN_PROGRESS:
case LAST_CANCEL_STOPPED_FLING:
state_ = GFC_IN_PROGRESS;
break;
case MD_STASHED:
break;
}
}
void TapSuppressionController::MouseDownTimerExpired() {
switch (state_) {
case NOTHING:
case GFC_IN_PROGRESS:
case LAST_CANCEL_STOPPED_FLING:
NOTREACHED() << "Timer fired on invalid state.";
state_ = NOTHING;
break;
case MD_STASHED:
TRACE_EVENT0("browser",
"TapSuppressionController::MouseDownTimerExpired");
render_widget_host_->ForwardMouseEventImmediately(stashed_mouse_down_);
state_ = NOTHING;
break;
}
}
} // namespace content
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