wip: Aura-specific implementation of unified touch selection: touch_selection

ui/touch_selection/touch_selection_controller_aura.cc

+// Copyright 2015 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_aura.h"
+
+#include "ui/aura/client/cursor_client.h"
+#include "ui/aura/client/screen_position_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"
+#include "ui/touch_selection/touch_handle_drawable_aura.h"
+#include "ui/touch_selection/touch_selection_controller_aura_test_api.h"
+
+namespace ui {
+
+class TouchSelectionControllerAura::EnvPreTargetHandler : public EventHandler {
+ public:
+  EnvPreTargetHandler(TouchSelectionControllerAura* selection_controller);
+  ~EnvPreTargetHandler() override;
+
+ private:
+  // EventHandler:
+  void OnKeyEvent(KeyEvent* event) override;
+  void OnMouseEvent(MouseEvent* event) override;
+  void OnScrollEvent(ScrollEvent* event) override;
+
+  TouchSelectionControllerAura* selection_controller_;
+};
+
+TouchSelectionControllerAura::EnvPreTargetHandler::EnvPreTargetHandler(
+    TouchSelectionControllerAura* selection_controller)
+    : selection_controller_(selection_controller) {
+  aura::Env::GetInstance()->AddPreTargetHandler(this);
+}
+
+TouchSelectionControllerAura::EnvPreTargetHandler::~EnvPreTargetHandler() {
+  aura::Env::GetInstance()->RemovePreTargetHandler(this);
+}
+
+void TouchSelectionControllerAura::EnvPreTargetHandler::OnKeyEvent(
+    KeyEvent* event) {
+  DCHECK(selection_controller_->is_insertion_active() ||
+         selection_controller_->is_selection_active());
+
+  selection_controller_->HideAndDisallowShowingAutomatically();
+}
+
+void TouchSelectionControllerAura::EnvPreTargetHandler::OnMouseEvent(
+    MouseEvent* event) {
+  DCHECK(selection_controller_->is_insertion_active() ||
+         selection_controller_->is_selection_active());
+  aura::client::CursorClient* cursor_client = aura::client::GetCursorClient(
+      selection_controller_->client()->GetNativeView()->GetRootWindow());
+  if (!cursor_client || cursor_client->IsMouseEventsEnabled())
+    selection_controller_->HideAndDisallowShowingAutomatically();
+}
+
+void TouchSelectionControllerAura::EnvPreTargetHandler::OnScrollEvent(
+    ScrollEvent* event) {
+  DCHECK(selection_controller_->is_insertion_active() ||
+         selection_controller_->is_selection_active());
+
+  selection_controller_->HideAndDisallowShowingAutomatically();
+}
+
+TouchSelectionControllerAura::TouchSelectionControllerAura(
+    TouchSelectionControllerClient* client,
+    base::TimeDelta tap_timeout,
+    float tap_slop,
+    bool show_on_tap_for_empty_editable)
+    : TouchSelectionControllerImpl(client,
+                                   tap_timeout,
+                                   tap_slop,
+                                   show_on_tap_for_empty_editable),
+      motion_event_(new MotionEventAura),
+      test_api_(nullptr) {
+  DCHECK(client);
+  client->GetNativeView()->AddPreTargetHandler(this);
+}
+
+TouchSelectionControllerAura::~TouchSelectionControllerAura() {
+  client()->GetNativeView()->RemovePreTargetHandler(this);
+}
+
+void TouchSelectionControllerAura::ActivateInsertion() {
+  if (!is_insertion_active())
+    env_pre_target_handler_.reset(new EnvPreTargetHandler(this));
+  TouchSelectionControllerImpl::ActivateInsertion();
+}
+
+void TouchSelectionControllerAura::DeactivateInsertion() {
+  env_pre_target_handler_.reset();
+  TouchSelectionControllerImpl::DeactivateInsertion();
+}
+
+void TouchSelectionControllerAura::ActivateSelection() {
+  if (!is_selection_active())
+    env_pre_target_handler_.reset(new EnvPreTargetHandler(this));
+  TouchSelectionControllerImpl::ActivateSelection();
+}
+
+void TouchSelectionControllerAura::DeactivateSelection() {
+  env_pre_target_handler_.reset();
+  TouchSelectionControllerImpl::DeactivateSelection();
+}
+
+void TouchSelectionControllerAura::OnTouchEvent(TouchEvent* event) {
+  const int index = motion_event_->FindPointerIndexOfId(event->touch_id());
+  const bool pointer_id_is_active = index != -1;
+
+  if (event->type() != ET_TOUCH_PRESSED && !pointer_id_is_active)
+    return;
+
+  if (event->type() == ET_TOUCH_PRESSED && pointer_id_is_active)
+    motion_event_.reset(new MotionEventAura);
+
+  motion_event_->OnTouch(*event);
+  if (WillHandleTouchEvent(*motion_event_))
+    event->SetHandled();
+  motion_event_->CleanupRemovedTouchPoints(*event);
+}
+
+void TouchSelectionControllerAura::OnGestureEvent(GestureEvent* event) {
+  switch (event->type()) {
+    case ET_GESTURE_LONG_PRESS:
+      OnLongPressEvent();
+      break;
+    case ET_GESTURE_TAP:
+      if (RectBetweenSelectionBounds(start(), end()).Contains(event->x(),
+                                                              event->y())) {
+        if (!is_insertion_active() && ! is_selection_active()) {
+          AllowShowingFromCurrentSelection();
+          event->SetHandled();
+        } else if (!is_selection_editable()) {
+          event->SetHandled();
+        }
+      }
+      if (!event->handled())
+        OnTapEvent();
+      break;
+    default:
+      break;
+  }
+}
+
+}  // namespace ui