cros: Default to natural scrolling if the internal diplay is a touchscreen.

ash/display/display_info.cc

 // Copyright (c) 2013 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 <stdio.h>
 #include <string>
 #include <vector>
 
 #include "ash/display/display_info.h"
 #include "base/logging.h"
@@ skipping 119 matching lines @@
 
   DVLOG(1) << "DisplayInfoFromSpec info=" << display_info.ToString()
            << ", spec=" << spec;
   return display_info;
 }
 
 DisplayInfo::DisplayInfo()
     : id_(gfx::Display::kInvalidDisplayID),
       has_overscan_(false),
       rotation_(gfx::Display::ROTATE_0),
+      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
       device_scale_factor_(1.0f),
       overscan_insets_in_dip_(0, 0, 0, 0),
       ui_scale_(1.0f),
       native_(false) {
 }
 
 DisplayInfo::DisplayInfo(int64 id,
                          const std::string& name,
                          bool has_overscan)
     : id_(id),
       name_(name),
       has_overscan_(has_overscan),
       rotation_(gfx::Display::ROTATE_0),
+      touch_support_(gfx::Display::TOUCH_SUPPORT_UNKNOWN),
       device_scale_factor_(1.0f),
       overscan_insets_in_dip_(0, 0, 0, 0),
       ui_scale_(1.0f),
       native_(false) {
 }
 
 DisplayInfo::~DisplayInfo() {
 }
 
 void DisplayInfo::Copy(const DisplayInfo& native_info) {
   DCHECK(id_ == native_info.id_);
   name_ = native_info.name_;
   has_overscan_ = native_info.has_overscan_;
 
   DCHECK(!native_info.bounds_in_native_.IsEmpty());
   bounds_in_native_ = native_info.bounds_in_native_;
   size_in_pixel_ = native_info.size_in_pixel_;
   device_scale_factor_ = native_info.device_scale_factor_;
   resolutions_ = native_info.resolutions_;
+  touch_support_ = native_info.touch_support_;
 
   // Copy overscan_insets_in_dip_ if it's not empty. This is for test
   // cases which use "/o" annotation which sets the overscan inset
   // to native, and that overscan has to be propagated. This does not
   // happen on the real environment.
   if (!native_info.overscan_insets_in_dip_.empty())
     overscan_insets_in_dip_ = native_info.overscan_insets_in_dip_;
 
   // Rotation_ and ui_scale_ are given by preference, or unit
   // tests. Don't copy if this native_info came from
@@ skipping 36 matching lines @@
 }
 
 gfx::Insets DisplayInfo::GetOverscanInsetsInPixel() const {
   return overscan_insets_in_dip_.Scale(device_scale_factor_);
 }
 
 std::string DisplayInfo::ToString() const {
   int rotation_degree = static_cast<int>(rotation_) * 90;
   return base::StringPrintf(
       "DisplayInfo[%lld] native bounds=%s, size=%s, scale=%f, "
-      "overscan=%s, rotation=%d, ui-scale=%f",
+      "overscan=%s, rotation=%d, ui-scale=%f, touchscreen=%s",
       static_cast<long long int>(id_),
       bounds_in_native_.ToString().c_str(),
       size_in_pixel_.ToString().c_str(),
       device_scale_factor_,
       overscan_insets_in_dip_.ToString().c_str(),
       rotation_degree,
-      ui_scale_);
+      ui_scale_,
+      touch_support_ == gfx::Display::TOUCH_SUPPORT_AVAILABLE ? "yes" :
+      touch_support_ == gfx::Display::TOUCH_SUPPORT_UNAVAILABLE ? "no" :
+      "unknown");
 }
 
 std::string DisplayInfo::ToFullString() const {
   std::string resolutions_str;
   std::vector<Resolution>::const_iterator iter = resolutions_.begin();
   for (; iter != resolutions_.end(); ++iter) {
     if (!resolutions_str.empty())
       resolutions_str += ",";
     resolutions_str += iter->size.ToString();
     if (iter->interlaced)
       resolutions_str += "(i)";
   }
   return ToString() + ", resolutions=" + resolutions_str;
 }
 
 }  // namespace internal
 }  // namespace ash