Reland: Implement Aura side of unified touch text selection for contents

content/browser/renderer_host/touch_selection_controller_aura.cc

+// 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 "content/browser/renderer_host/touch_selection_controller_aura.h"
+
+#include "base/debug/stack_trace.h"
+#include "content/browser/renderer_host/touch_handle_drawable_aura.h"
+#include "ui/aura/client/cursor_client.h"
+#include "ui/aura/env.h"
+#include "ui/aura/window.h"
+#include "ui/events/event.h"
+#include "ui/events/gesture_detection/gesture_configuration.h"
+#include "ui/events/gestures/motion_event_aura.h"
+
+
+namespace content {
+
+namespace {
+
+gfx::RectF Union(const gfx::RectF& r1, const gfx::RectF& r2) {
+  float x = std::min(r1.x(), r2.x());
+  float y = std::min(r1.y(), r2.y());
+  float right = std::max(r1.right(), r2.right());
+  float bottom = std::max(r1.bottom(), r2.bottom());
+  return gfx::RectF(x, y, right - x, bottom - y);
+}
+
+}
+
+TouchSelectionControllerAura::TouchSelectionControllerAura(
+    TouchSelectionControllerAuraClient* client)
+    : client_(client),
+      motion_event_(new ui::MotionEventAura),
+      quick_menu_(NULL),
+      scroll_in_progress_(false),
+      overscroll_in_progress_(false),
+      handle_drag_in_progress_(false) {
+  int tap_timeout_ms =
+      ui::GestureConfiguration::GetInstance()->show_press_delay_in_ms();
+  int touch_slop_pixels =
+      ui::GestureConfiguration::GetInstance()
+          ->max_touch_move_in_pixels_for_click();
+  controller_.reset(new TouchSelectionController(
+      this,
+      base::TimeDelta::FromMilliseconds(tap_timeout_ms),
+      touch_slop_pixels / client_->GetDeviceScaleFactor()));
+}
+
+TouchSelectionControllerAura::~TouchSelectionControllerAura() {
+}
+
+//void TouchSelectionControllerAura::SetTemporarilyHidden(bool hidden) {
+//  controller_->SetTemporarilyHidden(hidden);
+//  // hide menu
+//}
+
+void TouchSelectionControllerAura::OnSelectionEditable(bool editable) {
+  controller_->OnSelectionEditable(editable);
+  UpdateQuickMenu();
+}
+
+void TouchSelectionControllerAura::OnSelectionEmpty(bool empty) {
+  controller_->OnSelectionEmpty(empty);
+  UpdateQuickMenu();
+}
+
+
+void TouchSelectionControllerAura::OnSelectionBoundsChanged(
+    const cc::ViewportSelectionBound& start,
+    const cc::ViewportSelectionBound& end) {
+  if (start_ == start && end_ == end)
+    return;
+
+  start_ = start;
+  end_ = end;
+
+  controller_->OnSelectionBoundsChanged(start, end);
+  UpdateQuickMenu();
+}
+
+void TouchSelectionControllerAura::HandleGestureEvent(
+    ui::GestureEvent* event) {
+  switch (event->type()) {
+    case ui::ET_GESTURE_LONG_PRESS:
+      controller_->OnLongPressEvent();
+      break;
+    case ui::ET_GESTURE_TAP:
+      if (!controller_->is_selection_active() &&
+          !controller_->is_selection_active() &&
+          GetBoundingRect().Contains(event->x(), event->y())) {
+        controller_->ActivateSelection(start_, end_);
+        event->SetHandled();
+      } else {
+        controller_->OnTapEvent();
+      }
+      break;
+    case ui::ET_GESTURE_SCROLL_BEGIN:
+      scroll_in_progress_ = true;
+      UpdateQuickMenu();
+      break;
+    case ui::ET_GESTURE_SCROLL_END:
+      scroll_in_progress_ = false;
+      UpdateQuickMenu();
+      break;
+    default:
+      break;
+  }
+}
+
+void TouchSelectionControllerAura::HideAndDisallowShowingAutomatically() {
+  controller_->HideAndDisallowShowingAutomatically();
+  UpdateQuickMenu();
+}
+
+void TouchSelectionControllerAura::HandleTouchEvent(ui::TouchEvent* event) {
+  const int index = motion_event_->FindPointerIndexOfId(event->touch_id());
+  const bool pointer_id_is_active = index != -1;
+
+  if (event->type() != ui::ET_TOUCH_PRESSED && !pointer_id_is_active)
+    return;
+
+  if (event->type() == ui::ET_TOUCH_PRESSED && pointer_id_is_active)
+    motion_event_.reset(new ui::MotionEventAura);
+
+  motion_event_->OnTouch(*event);
+  if (controller_->WillHandleTouchEvent(*motion_event_))
+    event->SetHandled();
+  motion_event_->CleanupRemovedTouchPoints(*event);
+}
+
+void TouchSelectionControllerAura::OnWindowMoved() {
+  UpdateQuickMenu();
+}
+
+void TouchSelectionControllerAura::OnOverscrollStarted() {
+  overscroll_in_progress_ = true;
+  UpdateQuickMenu();
+}
+
+void TouchSelectionControllerAura::OnOverscrollCompleted() {
+  overscroll_in_progress_ = false;
+  UpdateQuickMenu();
+}
+
+void TouchSelectionControllerAura::OnFlingCompleted() {
+  scroll_in_progress_ = false;
+  UpdateQuickMenu();
+}
+
+gfx::RectF TouchSelectionControllerAura::GetCaretBounds() const {
+  return GetBoundingRect();
+}
+
+gfx::RectF TouchSelectionControllerAura::GetStartRect() const {
+  return gfx::BoundingRect(start_.edge_top, start_.edge_bottom);
+}
+
+gfx::RectF TouchSelectionControllerAura::GetEndRect() const {
+  return gfx::BoundingRect(end_.edge_top, end_.edge_bottom);
+}
+
+gfx::RectF TouchSelectionControllerAura::GetBoundingRect() const {
+  return Union(GetStartRect(), GetEndRect());
+}
+
+gfx::RectF TouchSelectionControllerAura::GetAnchorRect() const {
+  // TODO: Crop to view bounds
+  if (start_.visible && end_.visible)
+    return GetBoundingRect();
+  if (start_.visible)
+    return GetStartRect();
+  return GetEndRect();
+}
+
+void TouchSelectionControllerAura::QuickMenuTimerFired() {
+  DCHECK(controller_->is_insertion_active() ||
+         controller_->is_selection_active());
+
+  if (!start_.visible && !end_.visible)
+    return;
+
+  quick_menu_ = views::TouchEditingMenuView::Create(
+      this,
+      client_->ConvertRectToScreen(GetAnchorRect()),
+      gfx::Size(20, 50),
+      client_->GetParentWindow()->GetToplevelWindow());
+}
+
+void TouchSelectionControllerAura::UpdateQuickMenu() {
+  // Hide quick menu if there is any.
+  if (quick_menu_) {
+    quick_menu_->Close();
+    quick_menu_ = NULL;
+  } else {
+    quick_menu_timer_.Stop();
+  }
+
+  // Start timer to show quick menu if necessary.
+  if (!controller_->is_insertion_active() &&
+      !controller_->is_selection_active())
+    return;
+
+  if (!IsQuickMenuAllowed())
+    return;
+
+  quick_menu_timer_.Start(
+      FROM_HERE,
+      base::TimeDelta::FromMilliseconds(100),
+      this,
+      &TouchSelectionControllerAura::QuickMenuTimerFired);
+}
+
+bool TouchSelectionControllerAura::IsQuickMenuAllowed() const {
+  return !scroll_in_progress_ && !overscroll_in_progress_ &&
+         !handle_drag_in_progress_;
+}
+
+bool TouchSelectionControllerAura::SupportsAnimation() const {
+  return false;
+}
+
+void TouchSelectionControllerAura::SetNeedsAnimate() {
+  NOTREACHED();
+}
+
+void TouchSelectionControllerAura::MoveCaret(const gfx::PointF& position) {
+  client_->MoveCaret(position);
+}
+
+void TouchSelectionControllerAura::SelectBetweenCoordinates(
+    const gfx::PointF& start,
+    const gfx::PointF& end) {
+  client_->SelectBetweenCoordinates(start, end);
+}
+
+void TouchSelectionControllerAura::OnSelectionEvent(
+    SelectionEventType event,
+    const gfx::PointF& position) {
+  //if (event != INSERTION_MOVED)
+  //  handle_drag_in_progress_ = false;
+  switch (event) {
+    case SELECTION_SHOWN:
+      UpdateQuickMenu();
+      aura::Env::GetInstance()->AddPreTargetHandler(this);
+      break;
+    case SELECTION_CLEARED:
+      aura::Env::GetInstance()->RemovePreTargetHandler(this);
+      UpdateQuickMenu();
+      break;
+    case SELECTION_DRAG_STARTED:
+      handle_drag_in_progress_ = true;
+      UpdateQuickMenu();
+      break;
+    case SELECTION_DRAG_STOPPED:
+      handle_drag_in_progress_ = false;
+      UpdateQuickMenu();
+      break;
+    case INSERTION_SHOWN:
+      UpdateQuickMenu();
+      aura::Env::GetInstance()->AddPreTargetHandler(this);
+      break;
+    case INSERTION_MOVED:
+      break;
+    case INSERTION_TAPPED:
+      //UpdateQuickMenu();
+      break;
+    case INSERTION_CLEARED:
+      aura::Env::GetInstance()->RemovePreTargetHandler(this);
+      UpdateQuickMenu();
+      break;
+    case INSERTION_DRAG_STARTED:
+      //handle_drag_in_progress_ = true;
+      //UpdateQuickMenu();
+      break;
+  };
+}
+
+scoped_ptr<TouchHandleDrawable> TouchSelectionControllerAura::CreateDrawable() {
+  return scoped_ptr<TouchHandleDrawable>(
+      new TouchHandleDrawableAura(client_->GetParentWindow()));
+}
+
+bool TouchSelectionControllerAura::IsCommandIdEnabled(int command_id) const {
+  return client_->IsCommandIdEnabled(command_id);
+}
+
+void TouchSelectionControllerAura::ExecuteCommand(int command_id,
+                                                  int event_flags) {
+  HideAndDisallowShowingAutomatically();
+  client_->ExecuteCommand(command_id, event_flags);
+}
+
+void TouchSelectionControllerAura::OpenContextMenu() {
+  HideAndDisallowShowingAutomatically();
+  gfx::RectF anchor_rect = GetAnchorRect();
+  client_->OpenContextMenu(
+      gfx::PointF(anchor_rect.CenterPoint().x(), anchor_rect.y()));
+}
+
+void TouchSelectionControllerAura::OnMenuClosed(
+    views::TouchEditingMenuView* menu) {
+  if (menu == quick_menu_)
+    quick_menu_ = NULL;
+}
+
+void TouchSelectionControllerAura::OnKeyEvent(ui::KeyEvent* event) {
+  LOG(ERROR) << "KeyEvent: " << event->name();
+
+  DCHECK(controller_->is_insertion_active() ||
+         controller_->is_selection_active());
+
+  HideAndDisallowShowingAutomatically();
+}
+
+void TouchSelectionControllerAura::OnMouseEvent(ui::MouseEvent* event) {
+  LOG(ERROR) << "MouseEvent: " << event->name();
+
+  DCHECK(controller_->is_insertion_active() ||
+         controller_->is_selection_active());
+
+  aura::client::CursorClient* cursor_client = aura::client::GetCursorClient(
+      client_->GetParentWindow()->GetRootWindow());
+  if (!cursor_client || cursor_client->IsMouseEventsEnabled())
+    HideAndDisallowShowingAutomatically();
+}
+
+void TouchSelectionControllerAura::OnScrollEvent(ui::ScrollEvent* event) {
+  LOG(ERROR) << "ScrollEvent: " << event->name();
+
+  DCHECK(controller_->is_insertion_active() ||
+         controller_->is_selection_active());
+
+  HideAndDisallowShowingAutomatically();
+}
+
+}