wip: Touch Text Selection Prototypes

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 2355 matching lines @@
   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);
+  ui::TextSelectionGranularityStrategy strategy =
+      ui::GRANULARITY_STRATEGY_DEFAULT;
+  const std::string strategy_str = base::CommandLine::ForCurrentProcess()->
+        GetSwitchValueASCII(switches::kTouchTextSelectionStrategy);
+  if (strategy_str == "1")
+    strategy = ui::GRANULARITY_STRATEGY_DIRECTION;
+  else if (strategy_str == "2")
+    strategy = ui::GRANULARITY_STRATEGY_VELOCITY;
   selection_controller_.reset(
-      new ui::TouchSelectionControllerAura(selection_controller_client));
+      new ui::TouchSelectionControllerAura(selection_controller_client,
+                                           strategy));
+  const std::string decay_str = base::CommandLine::ForCurrentProcess()->
+        GetSwitchValueASCII(switches::kTouchTextSelectionHalfDecay);
+  const std::string threshold_str = base::CommandLine::ForCurrentProcess()->
+        GetSwitchValueASCII(switches::kTouchTextSelectionThreshold);
+  if (!decay_str.empty() && !threshold_str.empty()) {
+    int decay_ms = atoi(decay_str.c_str());
+    int threshold = atoi(threshold_str.c_str());
+    if (decay_ms && threshold)
+      selection_controller_->SetVelocityStrategyParameters(decay_ms, threshold);
+  }
+
 }
 
 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),
@@ skipping 244 matching lines @@
 
 ////////////////////////////////////////////////////////////////////////////////
 // RenderWidgetHostViewBase, public:
 
 // static
 void RenderWidgetHostViewBase::GetDefaultScreenInfo(WebScreenInfo* results) {
   GetScreenInfoForWindow(results, NULL);
 }
 
 }  // namespace content