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

content/browser/renderer_host/render_widget_host_view_aura.cc

 // Copyright (c) 2012 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/render_widget_host_view_aura.h"
 
 #include "base/auto_reset.h"
 #include "base/basictypes.h"
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 56 matching lines @@
 #include "ui/compositor/dip_util.h"
 #include "ui/events/event.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/gestures/gesture_recognizer.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/rect_conversions.h"
 #include "ui/gfx/geometry/size_conversions.h"
 #include "ui/gfx/screen.h"
 #include "ui/gfx/skia_util.h"
+#include "ui/touch_selection/touch_selection_controller_aura.h"
 #include "ui/wm/public/activation_client.h"
 #include "ui/wm/public/scoped_tooltip_disabler.h"
 #include "ui/wm/public/tooltip_client.h"
 #include "ui/wm/public/transient_window_client.h"
 #include "ui/wm/public/window_types.h"
 
 #if defined(OS_WIN)
 #include "content/browser/accessibility/browser_accessibility_manager_win.h"
 #include "content/browser/accessibility/browser_accessibility_win.h"
 #include "content/browser/renderer_host/legacy_render_widget_host_win.h"
@@ skipping 342 matching lines @@
       accept_return_character_(false),
       last_swapped_software_frame_scale_factor_(1.f),
       paint_canvas_(NULL),
       synthetic_move_sent_(false),
       cursor_visibility_state_in_renderer_(UNKNOWN),
 #if defined(OS_WIN)
       legacy_render_widget_host_HWND_(NULL),
       legacy_window_destroyed_(false),
 #endif
       has_snapped_to_boundary_(false),
-      touch_editing_client_(NULL),
       is_guest_view_hack_(is_guest_view_hack),
       weak_ptr_factory_(this) {
   if (!is_guest_view_hack_)
     host_->SetView(this);
 
   window_observer_.reset(new WindowObserver(this));
   aura::client::SetTooltipText(window_, &tooltip_);
   aura::client::SetActivationDelegate(window_, this);
   aura::client::SetActivationChangeObserver(window_, this);
   aura::client::SetFocusChangeObserver(window_, this);
@@ skipping 324 matching lines @@
   // Make sure we have a FocusClient before attempting to Focus(). In some
   // situations we may not yet be in a valid Window hierarchy (such as reloading
   // after out of memory discarded the tab).
   aura::client::FocusClient* client = aura::client::GetFocusClient(window_);
   if (client)
     window_->Focus();
 }
 
 void RenderWidgetHostViewAura::Blur() {
   window_->Blur();
+  if (selection_controller_)
+    selection_controller_->HideAndDisallowShowingAutomatically();
 }
 
 bool RenderWidgetHostViewAura::HasFocus() const {
   return window_->HasFocus();
 }
 
 bool RenderWidgetHostViewAura::IsSurfaceAvailableForCopy() const {
   return delegated_frame_host_->CanCopyToBitmap();
 }
 
@@ skipping 47 matching lines @@
   if (text_input_type_ != type ||
       text_input_mode_ != input_mode ||
       can_compose_inline_ != can_compose_inline ||
       text_input_flags_ != flags) {
     text_input_type_ = type;
     text_input_mode_ = input_mode;
     can_compose_inline_ = can_compose_inline;
     text_input_flags_ = flags;
     if (GetInputMethod())
       GetInputMethod()->OnTextInputTypeChanged(this);
-    if (touch_editing_client_)
-      touch_editing_client_->OnTextInputTypeChanged(text_input_type_);
+    const bool is_editable_node = type != ui::TEXT_INPUT_TYPE_NONE;
+    if (selection_controller_)
+      selection_controller_->OnSelectionEditable(is_editable_node);
   }
 }
 
 void RenderWidgetHostViewAura::OnTextInputStateChanged(
     const ViewHostMsg_TextInputState_Params& params) {
   text_input_flags_ = params.flags;
   if (params.show_ime_if_needed && params.type != ui::TEXT_INPUT_TYPE_NONE) {
     if (GetInputMethod())
       GetInputMethod()->ShowImeIfNeeded();
   }
@@ skipping 36 matching lines @@
     // Content tooltips should be visible indefinitely.
     tooltip_client->SetTooltipShownTimeout(window_, 0);
   }
 }
 
 void RenderWidgetHostViewAura::SelectionChanged(const base::string16& text,
                                                 size_t offset,
                                                 const gfx::Range& range) {
   RenderWidgetHostViewBase::SelectionChanged(text, offset, range);
 
+  if (selection_controller_)
+    selection_controller_->OnSelectionEmpty(text.empty());
+
 #if defined(USE_X11) && !defined(OS_CHROMEOS)
   if (text.empty() || range.is_empty())
     return;
   size_t pos = range.GetMin() - offset;
   size_t n = range.length();
 
   DCHECK(pos + n <= text.length()) << "The text can not fully cover range.";
   if (pos >= text.length()) {
     NOTREACHED() << "The text can not cover range.";
     return;
   }
 
   // Set the CLIPBOARD_TYPE_SELECTION to the ui::Clipboard.
   ui::ScopedClipboardWriter clipboard_writer(ui::CLIPBOARD_TYPE_SELECTION);
   clipboard_writer.WriteText(text.substr(pos, n));
 #endif  // defined(USE_X11) && !defined(OS_CHROMEOS)
 }
 
 gfx::Size RenderWidgetHostViewAura::GetRequestedRendererSize() const {
   return delegated_frame_host_->GetRequestedRendererSize();
 }
 
 void RenderWidgetHostViewAura::SelectionBoundsChanged(
     const ViewHostMsg_SelectionBounds_Params& params) {
-  ui::SelectionBound anchor_bound, focus_bound;
-  anchor_bound.SetEdge(params.anchor_rect.origin(),
-                       params.anchor_rect.bottom_left());
-  focus_bound.SetEdge(params.focus_rect.origin(),
-                      params.focus_rect.bottom_left());
-
-  if (params.anchor_rect == params.focus_rect) {
-    anchor_bound.set_type(ui::SelectionBound::CENTER);
-    focus_bound.set_type(ui::SelectionBound::CENTER);
-  } else {
-    // Whether text is LTR at the anchor handle.
-    bool anchor_LTR = params.anchor_dir == blink::WebTextDirectionLeftToRight;
-    // Whether text is LTR at the focus handle.
-    bool focus_LTR = params.focus_dir == blink::WebTextDirectionLeftToRight;
-
-    if ((params.is_anchor_first && anchor_LTR) ||
-        (!params.is_anchor_first && !anchor_LTR)) {
-      anchor_bound.set_type(ui::SelectionBound::LEFT);
-    } else {
-      anchor_bound.set_type(ui::SelectionBound::RIGHT);
-    }
-    if ((params.is_anchor_first && focus_LTR) ||
-        (!params.is_anchor_first && !focus_LTR)) {
-      focus_bound.set_type(ui::SelectionBound::RIGHT);
-    } else {
-      focus_bound.set_type(ui::SelectionBound::LEFT);
-    }
-  }
-
-  if (anchor_bound == selection_anchor_ && focus_bound == selection_focus_)
-    return;
-
-  selection_anchor_ = anchor_bound;
-  selection_focus_ = focus_bound;
-  if (GetInputMethod())
-    GetInputMethod()->OnCaretBoundsChanged(this);
-
-  if (touch_editing_client_) {
-    touch_editing_client_->OnSelectionOrCursorChanged(
-        anchor_bound, focus_bound);
-  }
+  NOTREACHED() << "Selection bounds should be routed through the compositor.";
 }
 
 void RenderWidgetHostViewAura::CopyFromCompositingSurface(
     const gfx::Rect& src_subrect,
     const gfx::Size& dst_size,
     ReadbackRequestCallback& callback,
     const SkColorType color_type) {
   delegated_frame_host_->CopyFromCompositingSurface(
       src_subrect, dst_size, callback, color_type);
 }
@@ skipping 68 matching lines @@
     scoped_ptr<cc::CompositorFrame> frame) {
   TRACE_EVENT0("content", "RenderWidgetHostViewAura::OnSwapCompositorFrame");
 
   last_scroll_offset_ = frame->metadata.root_scroll_offset;
   if (frame->delegated_frame_data) {
     delegated_frame_host_->SwapDelegatedFrame(
         output_surface_id,
         frame->delegated_frame_data.Pass(),
         frame->metadata.device_scale_factor,
         frame->metadata.latency_info);
+    SelectionBoundsUpdated(ui::SelectionBound(frame->metadata.selection_start),
+                           ui::SelectionBound(frame->metadata.selection_end));
     return;
   }
 
   if (frame->software_frame_data) {
     DLOG(ERROR) << "Unable to use software frame in aura";
     RecordAction(
         base::UserMetricsAction("BadMessageTerminate_SharedMemoryAura"));
     host_->GetProcess()->ReceivedBadMessage();
     return;
   }
 }
 
 void RenderWidgetHostViewAura::DidStopFlinging() {
-  if (touch_editing_client_)
-    touch_editing_client_->DidStopFlinging();
+  if (selection_controller_)
+    selection_controller_->OnFlingCompleted();
 }
 
 #if defined(OS_WIN)
 void RenderWidgetHostViewAura::SetParentNativeViewAccessible(
     gfx::NativeViewAccessible accessible_parent) {
 }
 
 gfx::NativeViewId RenderWidgetHostViewAura::GetParentForWindowlessPlugin()
     const {
   if (legacy_render_widget_host_HWND_) {
@@ skipping 59 matching lines @@
     InputEventAckState ack_result) {
   if (overscroll_controller_) {
     overscroll_controller_->ReceivedEventACK(
         event, (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result));
   }
 }
 
 void RenderWidgetHostViewAura::GestureEventAck(
     const blink::WebGestureEvent& event,
     InputEventAckState ack_result) {
-  if (touch_editing_client_)
-    touch_editing_client_->GestureEventAck(event.type);
-
   if (overscroll_controller_) {
     overscroll_controller_->ReceivedEventACK(
         event, (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result));
   }
 }
 
 void RenderWidgetHostViewAura::ProcessAckedTouchEvent(
     const TouchEventWithLatencyInfo& touch, InputEventAckState ack_result) {
   ScopedVector<ui::TouchEvent> events;
   if (!MakeUITouchEventsFromWebTouchEvents(touch, &events,
@@ skipping 350 matching lines @@
     return gfx::Rect(origin.x(),
                      origin.y(),
                      end.x() - origin.x(),
                      end.y() - origin.y());
   }
 
   return rect;
 }
 
 gfx::Rect RenderWidgetHostViewAura::GetCaretBounds() const {
-  gfx::Rect rect =
-      ui::RectBetweenSelectionBounds(selection_anchor_, selection_focus_);
-  return ConvertRectToScreen(rect);
+  if (selection_controller_) {
+    const ui::SelectionBound& start = selection_controller_->start();
+    const ui::SelectionBound& end = selection_controller_->end();
+    return ConvertRectToScreen(ui::RectBetweenSelectionBounds(start, end));
+  }
+  return gfx::Rect();
 }
 
 bool RenderWidgetHostViewAura::GetCompositionCharacterBounds(
     uint32 index,
     gfx::Rect* rect) const {
   DCHECK(rect);
   if (index >= composition_character_bounds_.size())
     return false;
   *rect = ConvertRectToScreen(composition_character_bounds_[index]);
   return true;
@@ skipping 178 matching lines @@
     const gfx::Point& location) {
   return true;
 }
 
 bool RenderWidgetHostViewAura::CanFocus() {
   return popup_type_ == blink::WebPopupTypeNone;
 }
 
 void RenderWidgetHostViewAura::OnCaptureLost() {
   host_->LostCapture();
-  if (touch_editing_client_)
-    touch_editing_client_->EndTouchEditing(false);
+  if (selection_controller_)
+    selection_controller_->HideAndDisallowShowingAutomatically();
 }
 
 void RenderWidgetHostViewAura::OnPaint(gfx::Canvas* canvas) {
   NOTREACHED();
 }
 
 void RenderWidgetHostViewAura::OnDeviceScaleFactorChanged(
     float device_scale_factor) {
   if (!host_ || !window_->GetRootWindow())
     return;
@@ skipping 62 matching lines @@
 }
 
 void RenderWidgetHostViewAura::GetHitTestMask(gfx::Path* mask) const {
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, ui::EventHandler implementation:
 
 void RenderWidgetHostViewAura::OnKeyEvent(ui::KeyEvent* event) {
   TRACE_EVENT0("input", "RenderWidgetHostViewAura::OnKeyEvent");
-  if (touch_editing_client_ && touch_editing_client_->HandleInputEvent(event))
-    return;
 
   if (popup_child_host_view_ && popup_child_host_view_->NeedsInputGrab()) {
     popup_child_host_view_->OnKeyEvent(event);
     if (event->handled())
       return;
   }
 
   // We need to handle the Escape key for Pepper Flash.
   if (is_fullscreen_ && event->key_code() == ui::VKEY_ESCAPE) {
     // Focus the window we were created from.
@@ skipping 26 matching lines @@
     // We don't have to communicate with an input method here.
     NativeWebKeyboardEvent webkit_event(*event);
     ForwardKeyboardEvent(webkit_event);
   }
   event->SetHandled();
 }
 
 void RenderWidgetHostViewAura::OnMouseEvent(ui::MouseEvent* event) {
   TRACE_EVENT0("input", "RenderWidgetHostViewAura::OnMouseEvent");
 
-  if (touch_editing_client_ && touch_editing_client_->HandleInputEvent(event))
-    return;
-
   if (mouse_locked_) {
     aura::client::CursorClient* cursor_client =
         aura::client::GetCursorClient(window_->GetRootWindow());
     DCHECK(!cursor_client || !cursor_client->IsCursorVisible());
 
     if (event->type() == ui::ET_MOUSEWHEEL) {
       blink::WebMouseWheelEvent mouse_wheel_event =
           MakeWebMouseWheelEvent(static_cast<ui::MouseWheelEvent&>(*event));
       if (mouse_wheel_event.deltaX != 0 || mouse_wheel_event.deltaY != 0)
         host_->ForwardWheelEvent(mouse_wheel_event);
@@ skipping 118 matching lines @@
     event->ConvertLocationToTarget(window_, window_->parent());
     window_->parent()->delegate()->OnMouseEvent(event);
   }
 
   if (!IsXButtonUpEvent(event))
     event->SetHandled();
 }
 
 void RenderWidgetHostViewAura::OnScrollEvent(ui::ScrollEvent* event) {
   TRACE_EVENT0("input", "RenderWidgetHostViewAura::OnScrollEvent");
-  if (touch_editing_client_ && touch_editing_client_->HandleInputEvent(event))
-    return;
 
   if (event->type() == ui::ET_SCROLL) {
 #if !defined(OS_WIN)
     // TODO(ananta)
     // Investigate if this is true for Windows 8 Metro ASH as well.
     if (event->finger_count() != 2)
       return;
 #endif
     blink::WebGestureEvent gesture_event =
         MakeWebGestureEventFlingCancel();
     host_->ForwardGestureEvent(gesture_event);
     blink::WebMouseWheelEvent mouse_wheel_event =
         MakeWebMouseWheelEvent(*event);
     host_->ForwardWheelEvent(mouse_wheel_event);
     RecordAction(base::UserMetricsAction("TrackpadScroll"));
   } else if (event->type() == ui::ET_SCROLL_FLING_START ||
              event->type() == ui::ET_SCROLL_FLING_CANCEL) {
     blink::WebGestureEvent gesture_event = MakeWebGestureEvent(*event);
     host_->ForwardGestureEvent(gesture_event);
     if (event->type() == ui::ET_SCROLL_FLING_START)
       RecordAction(base::UserMetricsAction("TrackpadScrollFling"));
   }
 
   event->SetHandled();
 }
 
 void RenderWidgetHostViewAura::OnTouchEvent(ui::TouchEvent* event) {
   TRACE_EVENT0("input", "RenderWidgetHostViewAura::OnTouchEvent");
-  if (touch_editing_client_ && touch_editing_client_->HandleInputEvent(event))
-    return;
+
+  if (selection_controller_) {
+    selection_controller_->HandleTouchEvent(event);
+    if (event->handled())
+      return;
+  }
 
   // Update the touch event first.
   if (!pointer_state_.OnTouch(*event)) {
     event->StopPropagation();
     return;
   }
 
   blink::WebTouchEvent touch_event = CreateWebTouchEventFromMotionEvent(
       pointer_state_, event->may_cause_scrolling());
   pointer_state_.CleanupRemovedTouchPoints(*event);
 
   // Forward the touch event only if a touch point was updated, and
   // there's a touch-event handler in the page, and no other
   // touch-event is in the queue. It is important to always mark
   // events as being handled asynchronously if there is a touch-event
   // handler in the page, or some touch-event is already in the queue,
   // even if no point has been updated. This ensures that this event
   // does not get processed by the gesture recognizer before events
   // currently awaiting dispatch in the touch queue.
   if (host_->ShouldForwardTouchEvent()) {
     event->DisableSynchronousHandling();
     host_->ForwardTouchEventWithLatencyInfo(touch_event, *event->latency());
   }
 }
 
 void RenderWidgetHostViewAura::OnGestureEvent(ui::GestureEvent* event) {
   TRACE_EVENT0("input", "RenderWidgetHostViewAura::OnGestureEvent");
+
+  if (selection_controller_) {
+    selection_controller_->HandleGestureEvent(event);
+    if (event->handled())
+      return;
+  }
+
   if ((event->type() == ui::ET_GESTURE_PINCH_BEGIN ||
       event->type() == ui::ET_GESTURE_PINCH_UPDATE ||
       event->type() == ui::ET_GESTURE_PINCH_END) && !pinch_zoom_enabled_) {
     event->SetHandled();
     return;
   }
 
-  if (touch_editing_client_ && touch_editing_client_->HandleInputEvent(event))
-    return;
-
   // Confirm existing composition text on TAP gesture, to make sure the input
   // caret won't be moved with an ongoing composition text.
   if (event->type() == ui::ET_GESTURE_TAP)
     FinishImeCompositionSession();
 
   RenderViewHostDelegate* delegate = NULL;
   if (host_->IsRenderView())
     delegate = RenderViewHost::From(host_)->GetDelegate();
 
   if (delegate && event->type() == ui::ET_GESTURE_BEGIN &&
@@ skipping 102 matching lines @@
         host_->GetRootBrowserAccessibilityManager();
     if (manager)
       manager->OnWindowFocused();
   } else if (window_ == lost_focus) {
     host_->SetActive(false);
     host_->Blur();
 
     DetachFromInputMethod();
     host_->SetInputMethodActive(false);
 
-    if (touch_editing_client_)
-      touch_editing_client_->EndTouchEditing(false);
+    if (selection_controller_)
+      selection_controller_->HideAndDisallowShowingAutomatically();
 
     if (overscroll_controller_)
       overscroll_controller_->Cancel();
 
     BrowserAccessibilityManager* manager =
         host_->GetRootBrowserAccessibilityManager();
     if (manager)
       manager->OnWindowBlurred();
 
     // If we lose the focus while fullscreen, close the window; Pepper Flash
@@ skipping 36 matching lines @@
   TRACE_EVENT1("ui", "RenderWidgetHostViewAura::OnHostMoved",
                "new_origin", new_origin.ToString());
 
   UpdateScreenInfo(window_);
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewAura, private:
 
 RenderWidgetHostViewAura::~RenderWidgetHostViewAura() {
-  if (touch_editing_client_)
-    touch_editing_client_->OnViewDestroyed();
-
+  selection_controller_.reset();
+  selection_controller_client_.reset();
   delegated_frame_host_.reset();
   window_observer_.reset();
   if (window_->GetHost())
     window_->GetHost()->RemoveObserver(this);
   UnlockMouse();
   if (popup_parent_host_view_) {
     DCHECK(popup_parent_host_view_->popup_child_host_view_ == NULL ||
            popup_parent_host_view_->popup_child_host_view_ == this);
     popup_parent_host_view_->popup_child_host_view_ = NULL;
   }
@@ skipping 129 matching lines @@
   host_->SendCursorVisibilityState(is_visible);
 }
 
 void RenderWidgetHostViewAura::SetOverscrollControllerEnabled(bool enabled) {
   if (!enabled)
     overscroll_controller_.reset();
   else if (!overscroll_controller_)
     overscroll_controller_.reset(new OverscrollController());
 }
 
+void RenderWidgetHostViewAura::InitSelectionController(
+      ui::TouchSelectionControllerAuraClient* selection_controller_client) {
+  DCHECK(!selection_controller_client_);
+  selection_controller_client_.reset(selection_controller_client);
+  selection_controller_.reset(
+      new ui::TouchSelectionControllerAura(selection_controller_client));
+}
+
 void RenderWidgetHostViewAura::SnapToPhysicalPixelBoundary() {
   // The top left corner of our view in window coordinates might not land on a
   // device pixel boundary if we have a non-integer device scale. In that case,
   // to avoid the web contents area looking blurry we translate the web contents
   // in the +x, +y direction to land on the nearest pixel boundary. This may
   // cause the bottom and right edges to be clipped slightly, but that's ok.
   aura::Window* snapped = NULL;
   // On desktop, use the root window. On alternative environment (ash),
   // use the toplevel window which must be already snapped.
   if (gfx::Screen::GetScreenFor(window_) !=
@@ skipping 12 matching lines @@
   if (HasDisplayPropertyChanged(window_))
     host_->InvalidateScreenInfo();
 
   SnapToPhysicalPixelBoundary();
   // Don't recursively call SetBounds if this bounds update is the result of
   // a Window::SetBoundsInternal call.
   if (!in_bounds_changed_)
     window_->SetBounds(rect);
   host_->WasResized();
   delegated_frame_host_->WasResized();
-  if (touch_editing_client_) {
-    touch_editing_client_->OnSelectionOrCursorChanged(selection_anchor_,
-                                                      selection_focus_);
-  }
 #if defined(OS_WIN)
   // Create the legacy dummy window which corresponds to the bounds of the
   // webcontents. This will be passed as the container window for windowless
   // plugins.
   // Plugins like Flash assume the container window which is returned via the
   // NPNVnetscapeWindow property corresponds to the bounds of the webpage.
   // This is not true in Aura where we have only HWND which is the main Aura
   // window. If we return this window to plugins like Flash then it causes the
   // coordinate translations done by these plugins to break.
   // Additonally the legacy dummy window is needed for accessibility and for
@@ skipping 123 matching lines @@
   }
 #endif
 
   host_->ForwardKeyboardEvent(event);
 }
 
 SkColorType RenderWidgetHostViewAura::PreferredReadbackFormat() {
   return kN32_SkColorType;
 }
 
+void RenderWidgetHostViewAura::SelectionBoundsUpdated(
+    const ui::SelectionBound& start,
+    const ui::SelectionBound& end) {
+  if (selection_controller_)
+    selection_controller_->OnSelectionBoundsUpdated(start, end);
+  if (GetInputMethod())
+    GetInputMethod()->OnCaretBoundsChanged(this);
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // DelegatedFrameHost, public:
 
 ui::Compositor* RenderWidgetHostViewAura::GetCompositor() const {
   aura::WindowTreeHost* host = window_->GetHost();
   return host ? host->compositor() : NULL;
 }
 
 ui::Layer* RenderWidgetHostViewAura::GetLayer() {
   return window_->layer();
@@ skipping 36 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content