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

content/browser/renderer_host/touch_handle_drawable_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_handle_drawable_aura.h"
+
+#include "ui/aura/window.h"
+#include "ui/aura/window_targeter.h"
+#include "ui/base/cursor/cursor.h"
+#include "ui/base/hit_test.h"
+#include "ui/events/event.h"
+#include "ui/gfx/canvas.h"
+
+namespace content {
+namespace {
+
+class TouchHandleDrawableAuraTargeter : public aura::WindowTargeter {
+ protected:
+  virtual bool EventLocationInsideBounds(
+      ui::EventTarget* target,
+      const ui::LocatedEvent& event) const override;
+};
+
+bool TouchHandleDrawableAuraTargeter::EventLocationInsideBounds(
+    ui::EventTarget* target,
+    const ui::LocatedEvent& event) const {
+  return false;
+}
+
+}
+
+TouchHandleDrawableAura::TouchHandleDrawableAura(aura::Window* parent)
+    : window_(new aura::Window(this)),
+      enabled_(false),
+      alpha_(0) {
+  window_->SetTransparent(true);
+  window_->Init(aura::WINDOW_LAYER_TEXTURED);
+  window_->set_owned_by_parent(false);
+  window_->SetEventTargeter(
+      scoped_ptr<ui::EventTargeter>(new TouchHandleDrawableAuraTargeter));
+  parent->AddChild(window_.get());
+}
+
+TouchHandleDrawableAura::~TouchHandleDrawableAura() {
+}
+
+void TouchHandleDrawableAura::SetEnabled(bool enabled) {
+  if (enabled == enabled_)
+    return;
+
+  enabled_ = enabled;
+  bool visible = alpha_ > 0; // XXX: float comparison
+  if (enabled_ && visible)
+    window_->Show();
+  else
+    window_->Hide();
+}
+
+void TouchHandleDrawableAura::SetOrientation(
+    TouchHandleOrientation orientation) {
+}
+
+void TouchHandleDrawableAura::SetAlpha(float alpha) {
+  if (alpha == alpha_) // XXX: float comparison
+    return;
+
+  alpha_ = alpha;
+  window_->layer()->SetOpacity(alpha_);
+  bool visible = alpha_ > 0; // XXX: float comparison
+  if (enabled_ && visible)
+    window_->Show();
+  else
+    window_->Hide();
+}
+
+void TouchHandleDrawableAura::SetFocus(const gfx::PointF& position) {
+  window_->SetBounds(gfx::Rect(position.x() - 10, position.y(), 20, 50));
+}
+
+bool TouchHandleDrawableAura::IntersectsWith(const gfx::RectF& rect) const {
+  gfx::RectF r(window_->bounds());
+  r.Inset(-25, -25);
+  return r.Intersects(rect);
+}
+
+gfx::Size TouchHandleDrawableAura::GetMinimumSize() const {
+  return gfx::Size(20, 50);
+}
+
+gfx::Size TouchHandleDrawableAura::GetMaximumSize() const {
+  return gfx::Size(20, 50);
+}
+
+void TouchHandleDrawableAura::OnBoundsChanged(const gfx::Rect& old_bounds,
+                                              const gfx::Rect& new_bounds) {
+}
+
+gfx::NativeCursor TouchHandleDrawableAura::GetCursor(const gfx::Point& point) {
+  return gfx::kNullCursor;
+}
+
+int TouchHandleDrawableAura::GetNonClientComponent(
+    const gfx::Point& point) const {
+  return HTCLIENT;
+}
+
+bool TouchHandleDrawableAura::ShouldDescendIntoChildForEventHandling(
+    aura::Window* child,
+    const gfx::Point& location) {
+  return false;
+}
+
+bool TouchHandleDrawableAura::CanFocus() {
+  return false;
+}
+
+void TouchHandleDrawableAura::OnCaptureLost() {
+}
+
+void TouchHandleDrawableAura::OnPaint(gfx::Canvas* canvas) {
+  canvas->DrawColor(SK_ColorYELLOW);
+}
+
+void TouchHandleDrawableAura::OnDeviceScaleFactorChanged(
+    float device_scale_factor) {
+}
+
+void TouchHandleDrawableAura::OnWindowDestroying(aura::Window* window) {
+}
+
+void TouchHandleDrawableAura::OnWindowDestroyed(aura::Window* window) {
+}
+
+void TouchHandleDrawableAura::OnWindowTargetVisibilityChanged(bool visible) {
+}
+
+bool TouchHandleDrawableAura::HasHitTestMask() const {
+  return false;
+}
+
+void TouchHandleDrawableAura::GetHitTestMask(gfx::Path* mask) const {
+}
+
+}