Suppress touchscreen tap immediately after a GestureFlingCancel

content/browser/renderer_host/tap_suppression_controller_aura.cc

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.

[mohsen, 2013/02/04 15:09:05]

This file is renamed to touchpad_tap_suppression_controller_aura.cc. Other than
the class name, nothing else is changed.

[rjkroege, 2013/02/05 16:00:07]

You used git mv to change its name yes?

[mohsen, 2013/02/06 16:13:06]

No. I just renamed (also changed contents) and then used git add/rm to add the
new file/remove the old file. AFAIK, git mv does the same.

-// 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