Move gesture/touch UMA logs into gesture provider

ui/events/gesture_detection/gesture_touch_uma_histogram.cc

Index: ui/events/gesture_detection/gesture_touch_uma_histogram.cc
diff --git a/ui/events/gesture_detection/gesture_touch_uma_histogram.cc b/ui/events/gesture_detection/gesture_touch_uma_histogram.cc
new file mode 100644
index 0000000000000000000000000000000000000000..5eadd865234fc3461d0c6535ecacf114ab732043
--- /dev/null
+++ b/ui/events/gesture_detection/gesture_touch_uma_histogram.cc
@@ -0,0 +1,175 @@
+// Copyright 2014 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 "ui/events/gesture_detection/gesture_touch_uma_histogram.h"
+
+#include "base/logging.h"
+#include "base/metrics/histogram.h"
+
+namespace ui {
+
+GestureTouchUMAHistogram::GestureTouchUMAHistogram() {
+}
+
+GestureTouchUMAHistogram::~GestureTouchUMAHistogram() {
+}
+
+GestureTouchUMAHistogram::WindowTouchDetails::WindowTouchDetails()
+    : max_distance_from_start_squared_(0), is_single_finger_(false) {
+}
+
+GestureTouchUMAHistogram::WindowTouchDetails::WindowTouchDetails(
+    const base::TimeTicks& start_time,
+    const gfx::Point& start_touch_position)
+    : start_time_(start_time),
+      start_touch_position_(start_touch_position),
+      max_distance_from_start_squared_(0),
+      is_single_finger_(true) {
+}
+
+GestureTouchUMAHistogram::WindowTouchDetails::~WindowTouchDetails() {
+}
+
+void GestureTouchUMAHistogram::RecordGestureEvent(
+    const GestureEventData& gesture) {
+  UMA_HISTOGRAM_ENUMERATION(
+      "Event.GestureCreated", UMAEventTypeFromEvent(gesture), UMA_ET_COUNT);
+}
+
+void GestureTouchUMAHistogram::RecordTouchEvent(const MotionEvent& event) {
+  EventType eventType = TouchEventTypeFromMotionEvent(event);

[tdresser, 2014/08/27 12:35:39]

Just use GetAction() from the MotionEvent directly.

[lanwei, 2014/08/27 23:32:00]

Done.

+  if (eventType == ET_TOUCH_PRESSED) {
+    details.reset(new WindowTouchDetails(
+        event.GetEventTime(), gfx::Point(event.GetX(), event.GetY())));
+  } else if (eventType == ET_TOUCH_MOVED && details->is_single_finger_) {
+    float cur_dist = (details->start_touch_position_ -
+                      gfx::Point(event.GetX(), event.GetY())).LengthSquared();
+    if (cur_dist > details->max_distance_from_start_squared_)
+      details->max_distance_from_start_squared_ = cur_dist;
+  } else {
+    if (eventType == ET_TOUCH_RELEASED && event.GetPointerCount() == 1 &&
+        details->is_single_finger_) {
+      UMA_HISTOGRAM_CUSTOM_COUNTS(
+          "Event.TouchMaxDistance",

[tdresser, 2014/08/27 12:35:39]

You'll need to modify histograms.xml to deprecate the old histogram names, and
add the new ones.

[lanwei, 2014/08/27 23:31:59]

Done.

+          static_cast<int>(sqrt(details->max_distance_from_start_squared_)),
+          0,
+          1500,
+          50);
+
+      base::TimeDelta duration = event.GetEventTime() - details->start_time_;
+      UMA_HISTOGRAM_TIMES("Event.TouchDuration2", duration);
+    }
+    details.reset(new WindowTouchDetails());
+  }
+}
+
+EventType GestureTouchUMAHistogram::TouchEventTypeFromMotionEvent(

[tdresser, 2014/08/27 12:35:39]

This is unnecessary.

[lanwei, 2014/08/27 23:31:59]

Done.

+    const MotionEvent& event) {
+  switch (event.GetAction()) {
+    case MotionEvent::ACTION_DOWN:
+      return ET_TOUCH_PRESSED;
+    case MotionEvent::ACTION_UP:
+      return ET_TOUCH_RELEASED;
+    case MotionEvent::ACTION_MOVE:
+      return ET_TOUCH_MOVED;
+    case MotionEvent::ACTION_CANCEL:
+      return ET_TOUCH_CANCELLED;
+    default:
+      return ET_UNKNOWN;
+  }
+}
+
+UMAEventType GestureTouchUMAHistogram::UMAEventTypeFromEvent(
+    const GestureEventData& gesture) {
+  switch (gesture.type()) {
+    case ET_TOUCH_RELEASED:
+      return UMA_ET_TOUCH_RELEASED;
+    case ET_TOUCH_PRESSED:
+      return UMA_ET_TOUCH_PRESSED;
+    case ET_TOUCH_MOVED:
+      return UMA_ET_TOUCH_MOVED;
+    case ET_TOUCH_CANCELLED:
+      return UMA_ET_TOUCH_CANCELLED;
+    case ET_GESTURE_SCROLL_BEGIN:
+      return UMA_ET_GESTURE_SCROLL_BEGIN;
+    case ET_GESTURE_SCROLL_END:
+      return UMA_ET_GESTURE_SCROLL_END;
+    case ET_GESTURE_SCROLL_UPDATE: {
+      int touch_points = gesture.details.touch_points();
+      if (touch_points == 1)
+        return UMA_ET_GESTURE_SCROLL_UPDATE;
+      else if (touch_points == 2)
+        return UMA_ET_GESTURE_SCROLL_UPDATE_2;
+      else if (touch_points == 3)
+        return UMA_ET_GESTURE_SCROLL_UPDATE_3;
+      return UMA_ET_GESTURE_SCROLL_UPDATE_4P;
+    }
+    case ET_GESTURE_TAP: {
+      int tap_count = gesture.details.tap_count();
+      if (tap_count == 1)
+        return UMA_ET_GESTURE_TAP;
+      if (tap_count == 2)
+        return UMA_ET_GESTURE_DOUBLE_TAP;
+      if (tap_count == 3)
+        return UMA_ET_GESTURE_TRIPLE_TAP;
+      NOTREACHED() << "Received tap with tapcount " << tap_count;
+      return UMA_ET_UNKNOWN;
+    }
+    case ET_GESTURE_TAP_DOWN:
+      return UMA_ET_GESTURE_TAP_DOWN;
+    case ET_GESTURE_BEGIN:
+      return UMA_ET_GESTURE_BEGIN;
+    case ET_GESTURE_END:
+      return UMA_ET_GESTURE_END;
+    case ET_GESTURE_TWO_FINGER_TAP:
+      return UMA_ET_GESTURE_TWO_FINGER_TAP;
+    case ET_GESTURE_PINCH_BEGIN:
+      return UMA_ET_GESTURE_PINCH_BEGIN;
+    case ET_GESTURE_PINCH_END:
+      return UMA_ET_GESTURE_PINCH_END;
+    case ET_GESTURE_PINCH_UPDATE: {
+      int touch_points = gesture.details.touch_points();
+      if (touch_points >= 4)
+        return UMA_ET_GESTURE_PINCH_UPDATE_4P;
+      else if (touch_points == 3)
+        return UMA_ET_GESTURE_PINCH_UPDATE_3;
+      return UMA_ET_GESTURE_PINCH_UPDATE;
+    }
+    case ET_GESTURE_LONG_PRESS:
+      return UMA_ET_GESTURE_LONG_PRESS;
+    case ET_GESTURE_LONG_TAP:
+      return UMA_ET_GESTURE_LONG_TAP;
+    case ET_GESTURE_SWIPE: {
+      int touch_points = gesture.details.touch_points();
+      if (touch_points == 1)
+        return UMA_ET_GESTURE_SWIPE_1;
+      else if (touch_points == 2)
+        return UMA_ET_GESTURE_SWIPE_2;
+      else if (touch_points == 3)
+        return UMA_ET_GESTURE_SWIPE_3;
+      return UMA_ET_GESTURE_SWIPE_4P;
+    }
+    case ET_GESTURE_WIN8_EDGE_SWIPE:
+      return UMA_ET_GESTURE_WIN8_EDGE_SWIPE;
+    case ET_GESTURE_TAP_CANCEL:
+      return UMA_ET_GESTURE_TAP_CANCEL;
+    case ET_GESTURE_SHOW_PRESS:
+      return UMA_ET_GESTURE_SHOW_PRESS;
+    case ET_SCROLL:
+      return UMA_ET_SCROLL;
+    case ET_SCROLL_FLING_START:
+      return UMA_ET_SCROLL_FLING_START;
+    case ET_SCROLL_FLING_CANCEL:
+      return UMA_ET_SCROLL_FLING_CANCEL;
+    case ET_GESTURE_TAP_UNCONFIRMED:
+      return UMA_ET_GESTURE_TAP_UNCONFIRMED;
+    case ET_GESTURE_DOUBLE_TAP:
+      return UMA_ET_GESTURE_DOUBLE_TAP;
+    default:
+      NOTREACHED();
+      return UMA_ET_UNKNOWN;
+  }
+}
+
+}  //  namespace ui