Route selection bounds updates through the compositor

cc/trees/layer_tree_host.cc

 // Copyright 2011 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 "cc/trees/layer_tree_host.h"
 
 #include <algorithm>
 #include <stack>
 #include <string>
 
@@ skipping 10 matching lines @@
 #include "cc/base/math_util.h"
 #include "cc/debug/devtools_instrumentation.h"
 #include "cc/debug/rendering_stats_instrumentation.h"
 #include "cc/input/top_controls_manager.h"
 #include "cc/layers/heads_up_display_layer.h"
 #include "cc/layers/heads_up_display_layer_impl.h"
 #include "cc/layers/layer.h"
 #include "cc/layers/layer_iterator.h"
 #include "cc/layers/painted_scrollbar_layer.h"
 #include "cc/layers/render_surface.h"
+#include "cc/output/selection_handle.h"
 #include "cc/resources/prioritized_resource_manager.h"
 #include "cc/resources/ui_resource_request.h"
 #include "cc/trees/layer_tree_host_client.h"
 #include "cc/trees/layer_tree_host_common.h"
 #include "cc/trees/layer_tree_host_impl.h"
 #include "cc/trees/layer_tree_impl.h"
 #include "cc/trees/occlusion_tracker.h"
 #include "cc/trees/single_thread_proxy.h"
 #include "cc/trees/thread_proxy.h"
 #include "cc/trees/tree_synchronizer.h"
@@ skipping 280 matching lines @@
   if (page_scale_layer_ && inner_viewport_scroll_layer_) {
     sync_tree->SetViewportLayersFromIds(
         page_scale_layer_->id(),
         inner_viewport_scroll_layer_->id(),
         outer_viewport_scroll_layer_ ? outer_viewport_scroll_layer_->id()
                                      : Layer::INVALID_ID);
   } else {
     sync_tree->ClearViewportLayers();
   }
 
+  sync_tree->RegisterSelection(
+      start_selection_layer_ ? start_selection_layer_->id() : 0,
+      start_selection_handle_,
+      end_selection_layer_ ? end_selection_layer_->id() : 0,
+      end_selection_handle_);
+
   float page_scale_delta, sent_page_scale_delta;
   if (settings_.impl_side_painting) {
     // Update the delta from the active tree, which may have
     // adjusted its delta prior to the pending tree being created.
     // This code is equivalent to that in LayerTreeImpl::SetPageScaleDelta.
     DCHECK_EQ(1.f, sync_tree->sent_page_scale_delta());
     page_scale_delta = host_impl->active_tree()->page_scale_delta();
     sent_page_scale_delta = host_impl->active_tree()->sent_page_scale_delta();
   } else {
     page_scale_delta = sync_tree->page_scale_delta();
@@ skipping 898 matching lines @@
 
 void LayerTreeHost::RegisterViewportLayers(
     scoped_refptr<Layer> page_scale_layer,
     scoped_refptr<Layer> inner_viewport_scroll_layer,
     scoped_refptr<Layer> outer_viewport_scroll_layer) {
   page_scale_layer_ = page_scale_layer;
   inner_viewport_scroll_layer_ = inner_viewport_scroll_layer;
   outer_viewport_scroll_layer_ = outer_viewport_scroll_layer;
 }
 
+void LayerTreeHost::RegisterSelection(scoped_refptr<Layer> start_layer,
+                                      const SelectionHandle& start_handle,
+                                      scoped_refptr<Layer> end_layer,
+                                      const SelectionHandle& end_handle) {
+  if (start_selection_layer_.get() == start_layer.get() &&
+      end_selection_layer_.get() == end_layer.get() &&
+      start_selection_handle_ == start_handle &&
+      end_selection_handle_ == end_handle)
+    return;
+
+  start_selection_layer_ = start_layer;
+  end_selection_layer_ = end_layer;
+  start_selection_handle_ = start_handle;
+  end_selection_handle_ = end_handle;
+  SetNeedsCommit();
+}
+
 int LayerTreeHost::ScheduleMicroBenchmark(
     const std::string& benchmark_name,
     scoped_ptr<base::Value> value,
     const MicroBenchmark::DoneCallback& callback) {
   return micro_benchmark_controller_.ScheduleRun(
       benchmark_name, value.Pass(), callback);
 }
 
 bool LayerTreeHost::SendMessageToMicroBenchmark(int id,
                                                 scoped_ptr<base::Value> value) {
@@ skipping 21 matching lines @@
   swap_promise_list_.push_back(swap_promise.Pass());
 }
 
 void LayerTreeHost::BreakSwapPromises(SwapPromise::DidNotSwapReason reason) {
   for (size_t i = 0; i < swap_promise_list_.size(); i++)
     swap_promise_list_[i]->DidNotSwap(reason);
   swap_promise_list_.clear();
 }
 
 }  // namespace cc