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touch_selection_controller.cc
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// 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/touch_selection/touch_selection_controller.h"
#include <memory>
#include "base/auto_reset.h"
#include "base/check_op.h"
#include "base/metrics/histogram_macros.h"
#include "base/metrics/user_metrics.h"
#include "base/notreached.h"
namespace ui {
namespace {
gfx::Vector2dF ComputeLineOffsetFromBottom(const gfx::SelectionBound& bound) {
gfx::Vector2dF line_offset =
gfx::ScaleVector2d(bound.edge_start() - bound.edge_end(), 0.5f);
// An offset of 8 DIPs is sufficient for most line sizes. For small lines,
// using half the line height avoids synthesizing a point on a line above
// (or below) the intended line.
const gfx::Vector2dF kMaxLineOffset(8.f, 8.f);
line_offset.SetToMin(kMaxLineOffset);
line_offset.SetToMax(-kMaxLineOffset);
return line_offset;
}
TouchHandleOrientation ToTouchHandleOrientation(
gfx::SelectionBound::Type type) {
switch (type) {
case gfx::SelectionBound::LEFT:
return TouchHandleOrientation::LEFT;
case gfx::SelectionBound::RIGHT:
return TouchHandleOrientation::RIGHT;
case gfx::SelectionBound::CENTER:
return TouchHandleOrientation::CENTER;
case gfx::SelectionBound::EMPTY:
return TouchHandleOrientation::UNDEFINED;
}
NOTREACHED() << "Invalid selection bound type: " << type;
return TouchHandleOrientation::UNDEFINED;
}
} // namespace
TouchSelectionController::Config::Config()
: max_tap_duration(base::Milliseconds(300)),
tap_slop(8),
enable_adaptive_handle_orientation(false),
enable_longpress_drag_selection(false),
hide_active_handle(false) {}
TouchSelectionController::Config::~Config() {
}
TouchSelectionController::TouchSelectionController(
TouchSelectionControllerClient* client,
const Config& config)
: client_(client),
config_(config),
response_pending_input_event_(INPUT_EVENT_TYPE_NONE),
start_orientation_(TouchHandleOrientation::UNDEFINED),
end_orientation_(TouchHandleOrientation::UNDEFINED),
active_status_(INACTIVE),
temporarily_hidden_(false),
anchor_drag_to_selection_start_(false),
longpress_drag_selector_(this),
selection_handle_dragged_(false),
consume_touch_sequence_(false),
show_touch_handles_(false) {
DCHECK(client_);
}
TouchSelectionController::~TouchSelectionController() {
}
void TouchSelectionController::OnSelectionBoundsChanged(
const gfx::SelectionBound& start,
const gfx::SelectionBound& end) {
if (start == start_ && end_ == end)
return;
if (start.type() == gfx::SelectionBound::EMPTY ||
end.type() == gfx::SelectionBound::EMPTY ||
!show_touch_handles_) {
HideHandles();
return;
}
// Swap the Handles when the start and end selection points cross each other.
if (active_status_ == SELECTION_ACTIVE) {
// Bounds have the same orientation.
bool need_swap = (start_selection_handle_->IsActive() &&
end_.edge_end() == start.edge_end()) ||
(end_selection_handle_->IsActive() &&
end.edge_end() == start_.edge_end());
// Bounds have different orientation.
// Specifically, for writing-mode: vertical-*, selection bounds are
// horizontal.
// When vertical-lr:
// - start bound is from right to left,
// - end bound is from left to right.
// When vertical-rl:
// - start bound is from left to right,
// - end bound is from right to left.
// So when previous start/end bound become current end/start bound,
// edge_start() and edge_end() are swapped. Therefore, we are comparing
// edge_end() with edge_start() here.
need_swap |= (start_selection_handle_->IsActive() &&
end_.edge_end() == start.edge_start()) ||
(end_selection_handle_->IsActive() &&
end.edge_end() == start_.edge_start());
if (need_swap)
start_selection_handle_.swap(end_selection_handle_);
}
// Update |anchor_drag_to_selection_start_| for long press drag selector.
// Since selection can be updated with only one end at a time, if one end is
// equal to the previous value, the updated end is the other.
if (start_ == start)
anchor_drag_to_selection_start_ = false;
else if (end_ == end)
anchor_drag_to_selection_start_ = true;
start_ = start;
end_ = end;
start_orientation_ = ToTouchHandleOrientation(start_.type());
end_orientation_ = ToTouchHandleOrientation(end_.type());
// Ensure that |response_pending_input_event_| is cleared after the method
// completes, while also making its current value available for the duration
// of the call.
InputEventType causal_input_event = response_pending_input_event_;
response_pending_input_event_ = INPUT_EVENT_TYPE_NONE;
base::AutoReset<InputEventType> auto_reset_response_pending_input_event(
&response_pending_input_event_, causal_input_event);
if ((start_orientation_ == TouchHandleOrientation::LEFT ||
start_orientation_ == TouchHandleOrientation::RIGHT) &&
(end_orientation_ == TouchHandleOrientation::RIGHT ||
end_orientation_ == TouchHandleOrientation::LEFT)) {
OnSelectionChanged();
return;
}
if (start_orientation_ == TouchHandleOrientation::CENTER) {
OnInsertionChanged();
return;
}
HideHandles();
}
void TouchSelectionController::OnViewportChanged(
const gfx::RectF viewport_rect) {
// Trigger a force update if the viewport is changed, so that
// it triggers a call to change the mirror values if required.
if (viewport_rect_ == viewport_rect)
return;
viewport_rect_ = viewport_rect;
if (active_status_ == INACTIVE)
return;
if (active_status_ == INSERTION_ACTIVE) {
DCHECK(insertion_handle_);
insertion_handle_->SetViewportRect(viewport_rect);
} else if (active_status_ == SELECTION_ACTIVE) {
DCHECK(start_selection_handle_);
DCHECK(end_selection_handle_);
start_selection_handle_->SetViewportRect(viewport_rect);
end_selection_handle_->SetViewportRect(viewport_rect);
}
// Update handle layout after setting the new Viewport size.
UpdateHandleLayoutIfNecessary();
}
bool TouchSelectionController::WillHandleTouchEvent(const MotionEvent& event) {
bool handled = WillHandleTouchEventImpl(event);
// If Action::DOWN is consumed, the rest of touch sequence should be consumed,
// too, regardless of value of |handled|.
// TODO(mohsen): This will consume touch events until the next Action::DOWN.
// Ideally we should consume until the final Action::UP/Action::CANCEL.
// But, apparently, we can't reliably determine the final Action::CANCEL in a
// multi-touch scenario. See https://crbug.com/653212.
if (event.GetAction() == MotionEvent::Action::DOWN)
consume_touch_sequence_ = handled;
return handled || consume_touch_sequence_;
}
void TouchSelectionController::HandleTapEvent(const gfx::PointF& location,
int tap_count) {
if (tap_count > 1) {
response_pending_input_event_ = REPEATED_TAP;
} else {
response_pending_input_event_ = TAP;
}
}
void TouchSelectionController::HandleLongPressEvent(
base::TimeTicks event_time,
const gfx::PointF& location) {
longpress_drag_selector_.OnLongPressEvent(event_time, location);
response_pending_input_event_ = LONG_PRESS;
}
void TouchSelectionController::OnScrollBeginEvent() {
// When there is an active selection, if the user performs a long-press that
// does not trigger a new selection (e.g. a long-press on an empty area) and
// then scrolls, the scroll will move the selection. In this case we will
// think incorrectly that the selection change was due to the long-press and
// will activate touch selection and start long-press drag gesture (see
// ActivateInsertionIfNecessary()). To prevent this, we need to reset the
// state of touch selection controller and long-press drag selector.
// TODO(mohsen): Remove this workaround when we have enough information about
// the cause of a selection change (see https://crbug.com/571897).
longpress_drag_selector_.OnScrollBeginEvent();
response_pending_input_event_ = INPUT_EVENT_TYPE_NONE;
}
void TouchSelectionController::HideHandles() {
response_pending_input_event_ = INPUT_EVENT_TYPE_NONE;
DeactivateInsertion();
DeactivateSelection();
start_ = gfx::SelectionBound();
end_ = gfx::SelectionBound();
start_orientation_ = ToTouchHandleOrientation(start_.type());
end_orientation_ = ToTouchHandleOrientation(end_.type());
}
void TouchSelectionController::HideAndDisallowShowingAutomatically() {
HideHandles();
show_touch_handles_ = false;
}
void TouchSelectionController::SetTemporarilyHidden(bool hidden) {
if (temporarily_hidden_ == hidden)
return;
temporarily_hidden_ = hidden;
RefreshHandleVisibility();
}
bool TouchSelectionController::Animate(base::TimeTicks frame_time) {
if (active_status_ == INSERTION_ACTIVE)
return insertion_handle_->Animate(frame_time);
if (active_status_ == SELECTION_ACTIVE) {
bool needs_animate = start_selection_handle_->Animate(frame_time);
needs_animate |= end_selection_handle_->Animate(frame_time);
return needs_animate;
}
return false;
}
gfx::RectF TouchSelectionController::GetRectBetweenBounds() const {
// Short-circuit for efficiency.
if (active_status_ == INACTIVE)
return gfx::RectF();
if (start_.visible() && !end_.visible()) {
// This BoundingRect is actually a line unless the selection is rotated.
return gfx::BoundingRect(start_.edge_start(), start_.edge_end());
}
if (end_.visible() && !start_.visible()) {
// This BoundingRect is actually a line unless the selection is rotated.
return gfx::BoundingRect(end_.edge_start(), end_.edge_end());
}
// If both handles are visible, or both are invisible, use the entire rect.
// Specifically, if both handles are on the same horizontal line for
// writing-mode: vertical-*, or both are on the same vertical line for
// writing-mode: horizontal, the entire rect is actually a line unless the
// selection is rotated.
return RectFBetweenSelectionBounds(start_, end_);
}
gfx::RectF TouchSelectionController::GetVisibleRectBetweenBounds() const {
// Short-circuit for efficiency.
if (active_status_ == INACTIVE)
return gfx::RectF();
// Returns the rect of the entire visible selection rect.
return RectFBetweenVisibleSelectionBounds(start_, end_);
}
gfx::RectF TouchSelectionController::GetStartHandleRect() const {
if (active_status_ == INSERTION_ACTIVE)
return insertion_handle_->GetVisibleBounds();
if (active_status_ == SELECTION_ACTIVE)
return start_selection_handle_->GetVisibleBounds();
return gfx::RectF();
}
gfx::RectF TouchSelectionController::GetEndHandleRect() const {
if (active_status_ == INSERTION_ACTIVE)
return insertion_handle_->GetVisibleBounds();
if (active_status_ == SELECTION_ACTIVE)
return end_selection_handle_->GetVisibleBounds();
return gfx::RectF();
}
float TouchSelectionController::GetTouchHandleHeight() const {
if (active_status_ == INSERTION_ACTIVE)
return insertion_handle_->GetVisibleBounds().height();
if (active_status_ == SELECTION_ACTIVE) {
if (GetStartVisible())
return start_selection_handle_->GetVisibleBounds().height();
if (GetEndVisible())
return end_selection_handle_->GetVisibleBounds().height();
}
return 0.f;
}
float TouchSelectionController::GetActiveHandleMiddleY() const {
const gfx::SelectionBound* bound = nullptr;
if (active_status_ == INSERTION_ACTIVE && insertion_handle_->IsActive())
bound = &start_;
if (active_status_ == SELECTION_ACTIVE) {
if (start_selection_handle_->IsActive())
bound = &start_;
else if (end_selection_handle_->IsActive())
bound = &end_;
}
if (!bound)
return 0.f;
return (bound->edge_start().y() + bound->edge_end().y()) / 2.f;
}
const gfx::PointF& TouchSelectionController::GetStartPosition() const {
return start_.edge_end();
}
const gfx::PointF& TouchSelectionController::GetEndPosition() const {
return end_.edge_end();
}
bool TouchSelectionController::WillHandleTouchEventImpl(
const MotionEvent& event) {
show_touch_handles_ = true;
if (config_.enable_longpress_drag_selection &&
longpress_drag_selector_.WillHandleTouchEvent(event)) {
return true;
}
if (active_status_ == INSERTION_ACTIVE) {
DCHECK(insertion_handle_);
return insertion_handle_->WillHandleTouchEvent(event);
}
if (active_status_ == SELECTION_ACTIVE) {
DCHECK(start_selection_handle_);
DCHECK(end_selection_handle_);
if (start_selection_handle_->IsActive())
return start_selection_handle_->WillHandleTouchEvent(event);
if (end_selection_handle_->IsActive())
return end_selection_handle_->WillHandleTouchEvent(event);
const gfx::PointF event_pos(event.GetX(), event.GetY());
if ((event_pos - GetStartPosition()).LengthSquared() <=
(event_pos - GetEndPosition()).LengthSquared()) {
return start_selection_handle_->WillHandleTouchEvent(event);
}
return end_selection_handle_->WillHandleTouchEvent(event);
}
return false;
}
void TouchSelectionController::OnSwipeToMoveCursorBegin() {
if (config_.hide_active_handle) {
// Hide the handle when magnifier is showing since it can confuse the user.
SetTemporarilyHidden(true);
// If the user has typed something, the insertion handle might be hidden.
// Prepare to show touch handles on end.
show_touch_handles_ = true;
}
}
void TouchSelectionController::OnSwipeToMoveCursorEnd() {
// Show the handle at the end if magnifier was showing.
if (config_.hide_active_handle)
SetTemporarilyHidden(false);
}
void TouchSelectionController::OnDragBegin(
const TouchSelectionDraggable& draggable,
const gfx::PointF& drag_position) {
if (&draggable == insertion_handle_.get()) {
DCHECK_EQ(active_status_, INSERTION_ACTIVE);
if (config_.hide_active_handle)
insertion_handle_->SetTransparent();
client_->OnSelectionEvent(INSERTION_HANDLE_DRAG_STARTED);
anchor_drag_to_selection_start_ = true;
return;
}
DCHECK_EQ(active_status_, SELECTION_ACTIVE);
if (&draggable == start_selection_handle_.get()) {
anchor_drag_to_selection_start_ = true;
} else if (&draggable == end_selection_handle_.get()) {
anchor_drag_to_selection_start_ = false;
} else {
DCHECK_EQ(&draggable, &longpress_drag_selector_);
anchor_drag_to_selection_start_ =
(drag_position - GetStartPosition()).LengthSquared() <
(drag_position - GetEndPosition()).LengthSquared();
}
if (config_.hide_active_handle) {
if (&draggable == start_selection_handle_.get()) {
start_selection_handle_->SetTransparent();
} else if (&draggable == end_selection_handle_.get()) {
end_selection_handle_->SetTransparent();
}
}
gfx::PointF base = GetStartPosition() + GetStartLineOffset();
gfx::PointF extent = GetEndPosition() + GetEndLineOffset();
if (anchor_drag_to_selection_start_)
std::swap(base, extent);
// If this is the first drag, log an action to allow user action sequencing.
if (!selection_handle_dragged_)
base::RecordAction(base::UserMetricsAction("SelectionChanged"));
selection_handle_dragged_ = true;
// When moving the handle we want to move only the extent point. Before doing
// so we must make sure that the base point is set correctly.
client_->SelectBetweenCoordinates(base, extent);
client_->OnSelectionEvent(SELECTION_HANDLE_DRAG_STARTED);
}
void TouchSelectionController::OnDragUpdate(
const TouchSelectionDraggable& draggable,
const gfx::PointF& drag_position) {
// As the position corresponds to the bottom left point of the selection
// bound, offset it to some reasonable point on the current line of text.
gfx::Vector2dF line_offset = anchor_drag_to_selection_start_
? GetStartLineOffset()
: GetEndLineOffset();
gfx::PointF line_position = drag_position + line_offset;
if (&draggable == insertion_handle_.get())
client_->MoveCaret(line_position);
else
client_->MoveRangeSelectionExtent(line_position);
// We use the bound middle point to restrict the ability to move up and
// down, but let user move it more freely in horizontal direction.
if (&draggable == &longpress_drag_selector_) {
// Show magnifier at the selection edge.
const gfx::SelectionBound* bound =
anchor_drag_to_selection_start_ ? &start_ : &end_;
const float x = bound->edge_start().x();
const float y = (bound->edge_start().y() + bound->edge_end().y()) / 2.f;
client_->OnDragUpdate(TouchSelectionDraggable::Type::kLongpress,
gfx::PointF(x, y));
} else {
const float y = GetActiveHandleMiddleY();
client_->OnDragUpdate(TouchSelectionDraggable::Type::kTouchHandle,
gfx::PointF(drag_position.x(), y));
}
}
void TouchSelectionController::OnDragEnd(
const TouchSelectionDraggable& draggable) {
if (&draggable == insertion_handle_.get())
client_->OnSelectionEvent(INSERTION_HANDLE_DRAG_STOPPED);
else
client_->OnSelectionEvent(SELECTION_HANDLE_DRAG_STOPPED);
}
bool TouchSelectionController::IsWithinTapSlop(
const gfx::Vector2dF& delta) const {
return delta.LengthSquared() <
(static_cast<double>(config_.tap_slop) * config_.tap_slop);
}
void TouchSelectionController::OnHandleTapped(const TouchHandle& handle) {
if (insertion_handle_ && &handle == insertion_handle_.get())
client_->OnSelectionEvent(INSERTION_HANDLE_TAPPED);
}
void TouchSelectionController::SetNeedsAnimate() {
client_->SetNeedsAnimate();
}
std::unique_ptr<TouchHandleDrawable>
TouchSelectionController::CreateDrawable() {
return client_->CreateDrawable();
}
base::TimeDelta TouchSelectionController::GetMaxTapDuration() const {
return config_.max_tap_duration;
}
bool TouchSelectionController::IsAdaptiveHandleOrientationEnabled() const {
return config_.enable_adaptive_handle_orientation;
}
void TouchSelectionController::OnLongPressDragActiveStateChanged() {
// The handles should remain hidden for the duration of a longpress drag,
// including the time between a longpress and the start of drag motion.
RefreshHandleVisibility();
}
gfx::PointF TouchSelectionController::GetSelectionStart() const {
return GetStartPosition();
}
gfx::PointF TouchSelectionController::GetSelectionEnd() const {
return GetEndPosition();
}
void TouchSelectionController::OnInsertionChanged() {
DeactivateSelection();
const bool activated = ActivateInsertionIfNecessary();
const TouchHandle::AnimationStyle animation = GetAnimationStyle(!activated);
insertion_handle_->SetFocus(start_.edge_start(), start_.edge_end());
insertion_handle_->SetVisible(GetStartVisible(), animation);
UpdateHandleLayoutIfNecessary();
client_->OnSelectionEvent(activated ? INSERTION_HANDLE_SHOWN
: INSERTION_HANDLE_MOVED);
}
void TouchSelectionController::OnSelectionChanged() {
DeactivateInsertion();
const bool activated = ActivateSelectionIfNecessary();
const TouchHandle::AnimationStyle animation = GetAnimationStyle(!activated);
start_selection_handle_->SetFocus(start_.edge_start(), start_.edge_end());
end_selection_handle_->SetFocus(end_.edge_start(), end_.edge_end());
start_selection_handle_->SetOrientation(start_orientation_);
end_selection_handle_->SetOrientation(end_orientation_);
start_selection_handle_->SetVisible(GetStartVisible(), animation);
end_selection_handle_->SetVisible(GetEndVisible(), animation);
UpdateHandleLayoutIfNecessary();
client_->OnSelectionEvent(activated ? SELECTION_HANDLES_SHOWN
: SELECTION_HANDLES_MOVED);
}
bool TouchSelectionController::ActivateInsertionIfNecessary() {
DCHECK_NE(SELECTION_ACTIVE, active_status_);
if (!insertion_handle_) {
insertion_handle_ = std::make_unique<TouchHandle>(
this, TouchHandleOrientation::CENTER, viewport_rect_);
}
if (active_status_ == INACTIVE || response_pending_input_event_ == TAP ||
response_pending_input_event_ == LONG_PRESS) {
active_status_ = INSERTION_ACTIVE;
insertion_handle_->SetEnabled(true);
insertion_handle_->SetViewportRect(viewport_rect_);
response_pending_input_event_ = INPUT_EVENT_TYPE_NONE;
return true;
}
return false;
}
void TouchSelectionController::DeactivateInsertion() {
if (active_status_ != INSERTION_ACTIVE)
return;
DCHECK(insertion_handle_);
active_status_ = INACTIVE;
insertion_handle_->SetEnabled(false);
client_->OnSelectionEvent(INSERTION_HANDLE_CLEARED);
}
bool TouchSelectionController::ActivateSelectionIfNecessary() {
DCHECK_NE(INSERTION_ACTIVE, active_status_);
if (!start_selection_handle_) {
start_selection_handle_ =
std::make_unique<TouchHandle>(this, start_orientation_, viewport_rect_);
} else {
start_selection_handle_->SetEnabled(true);
start_selection_handle_->SetViewportRect(viewport_rect_);
}
if (!end_selection_handle_) {
end_selection_handle_ =
std::make_unique<TouchHandle>(this, end_orientation_, viewport_rect_);
} else {
end_selection_handle_->SetEnabled(true);
end_selection_handle_->SetViewportRect(viewport_rect_);
}
// As a long press received while a selection is already active may trigger
// an entirely new selection, notify the client but avoid sending an
// intervening SELECTION_HANDLES_CLEARED update to avoid unnecessary state
// changes.
if (active_status_ == INACTIVE ||
response_pending_input_event_ == LONG_PRESS ||
response_pending_input_event_ == REPEATED_TAP) {
if (active_status_ == SELECTION_ACTIVE) {
// The active selection session finishes with the start of the new one.
LogSelectionEnd();
}
active_status_ = SELECTION_ACTIVE;
selection_handle_dragged_ = false;
selection_start_time_ = base::TimeTicks::Now();
response_pending_input_event_ = INPUT_EVENT_TYPE_NONE;
longpress_drag_selector_.OnSelectionActivated();
return true;
}
return false;
}
void TouchSelectionController::DeactivateSelection() {
if (active_status_ != SELECTION_ACTIVE)
return;
DCHECK(start_selection_handle_);
DCHECK(end_selection_handle_);
LogSelectionEnd();
longpress_drag_selector_.OnSelectionDeactivated();
start_selection_handle_->SetEnabled(false);
end_selection_handle_->SetEnabled(false);
active_status_ = INACTIVE;
client_->OnSelectionEvent(SELECTION_HANDLES_CLEARED);
}
void TouchSelectionController::UpdateHandleLayoutIfNecessary() {
if (active_status_ == INSERTION_ACTIVE) {
DCHECK(insertion_handle_);
insertion_handle_->UpdateHandleLayout();
} else if (active_status_ == SELECTION_ACTIVE) {
DCHECK(start_selection_handle_);
DCHECK(end_selection_handle_);
start_selection_handle_->UpdateHandleLayout();
end_selection_handle_->UpdateHandleLayout();
}
}
void TouchSelectionController::RefreshHandleVisibility() {
TouchHandle::AnimationStyle animation_style = GetAnimationStyle(true);
if (active_status_ == SELECTION_ACTIVE) {
start_selection_handle_->SetVisible(GetStartVisible(), animation_style);
end_selection_handle_->SetVisible(GetEndVisible(), animation_style);
}
if (active_status_ == INSERTION_ACTIVE)
insertion_handle_->SetVisible(GetStartVisible(), animation_style);
// Update handle layout if handle visibility is explicitly changed.
UpdateHandleLayoutIfNecessary();
}
gfx::Vector2dF TouchSelectionController::GetStartLineOffset() const {
return ComputeLineOffsetFromBottom(start_);
}
gfx::Vector2dF TouchSelectionController::GetEndLineOffset() const {
return ComputeLineOffsetFromBottom(end_);
}
bool TouchSelectionController::GetStartVisible() const {
if (!start_.visible())
return false;
return !temporarily_hidden_ && !longpress_drag_selector_.IsActive();
}
bool TouchSelectionController::GetEndVisible() const {
if (!end_.visible())
return false;
return !temporarily_hidden_ && !longpress_drag_selector_.IsActive();
}
TouchHandle::AnimationStyle TouchSelectionController::GetAnimationStyle(
bool was_active) const {
return was_active && client_->SupportsAnimation()
? TouchHandle::ANIMATION_SMOOTH
: TouchHandle::ANIMATION_NONE;
}
void TouchSelectionController::LogSelectionEnd() {
// TODO(mfomitchev): Once we are able to tell the difference between
// 'successful' and 'unsuccessful' selections - log
// Event.TouchSelection.Duration instead and get rid of
// Event.TouchSelectionD.WasDraggeduration.
if (selection_handle_dragged_) {
base::TimeDelta duration = base::TimeTicks::Now() - selection_start_time_;
UMA_HISTOGRAM_CUSTOM_TIMES("Event.TouchSelection.WasDraggedDuration",
duration, base::Milliseconds(500),
base::Seconds(60), 60);
}
}
} // namespace ui