Add FakeDisplayDelegate for off device usage.

ui/display/chromeos/virtual_display_delegate.cc

Index: ui/display/chromeos/virtual_display_delegate.cc
diff --git a/ui/display/chromeos/virtual_display_delegate.cc b/ui/display/chromeos/virtual_display_delegate.cc
new file mode 100644
index 0000000000000000000000000000000000000000..0c7b5c9b29e1ad313eb86ff1ee0d1b061c0cca2d
--- /dev/null
+++ b/ui/display/chromeos/virtual_display_delegate.cc
@@ -0,0 +1,189 @@
+// Copyright 2016 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 "ui/display/chromeos/virtual_display_delegate.h"
+
+#include <string>
+
+#include "base/command_line.h"
+#include "base/logging.h"
+#include "base/memory/ptr_util.h"
+#include "base/strings/string_split.h"
+#include "ui/display/display.h"
+#include "ui/display/display_switches.h"
+#include "ui/display/types/native_display_observer.h"
+#include "ui/display/util/display_util.h"
+
+namespace display {
+
+namespace {
+
+// The EDID specification marks the top bit of the manufacturer id as reserved.
+const int16_t kReservedManufacturerID = static_cast<int16_t>(1 << 15);
+
+}  // namespace
+
+VirtualDisplayDelegate::VirtualDisplayDelegate() {}
+
+VirtualDisplayDelegate::~VirtualDisplayDelegate() {}
+
+int64_t VirtualDisplayDelegate::AddVirtualDisplay(
+    const gfx::Size& display_size) {
+  if (next_virtual_display_id_ == 0xff) {
+    LOG(WARNING) << "Exceeded virtual display id limit";
+    return display::Display::kInvalidDisplayID;
+  }
+
+  int64_t display_id = GenerateDisplayID(kReservedManufacturerID, 0x0,
+                                         ++next_virtual_display_id_);
+  displays_.push_back(
+      base::MakeUnique<ui::DisplaySnapshotVirtual>(display_id, display_size));
+  OnConfigurationChanged();
+
+  return display_id;
+}
+
+bool VirtualDisplayDelegate::RemoveVirtualDisplay(int64_t display_id) {
+  auto iter = displays_.begin();
+  for (; iter != displays_.end(); ++iter) {
+    if ((*iter)->display_id() == display_id)
+      break;
+  }
+
+  if (iter == displays_.end())
+    return false;
+
+  displays_.erase(iter);
+  OnConfigurationChanged();
+
+  return true;
+}
+
+void VirtualDisplayDelegate::Initialize() {
+  DCHECK(!initialized_);
+  InitFromCommandLine();
+
+  // If no command line flags are provided then initialize a default display.
+  if (displays_.empty())
+    AddVirtualDisplay(gfx::Size(1024, 768));
+
+  initialized_ = true;
+}
+
+void VirtualDisplayDelegate::GrabServer() {}
+
+void VirtualDisplayDelegate::UngrabServer() {}
+
+void VirtualDisplayDelegate::TakeDisplayControl(
+    const ui::DisplayControlCallback& callback) {
+  callback.Run(false);
+}
+
+void VirtualDisplayDelegate::RelinquishDisplayControl(
+    const ui::DisplayControlCallback& callback) {
+  callback.Run(false);
+}
+
+void VirtualDisplayDelegate::SyncWithServer() {}
+
+void VirtualDisplayDelegate::SetBackgroundColor(uint32_t color_argb) {}
+
+void VirtualDisplayDelegate::ForceDPMSOn() {}
+
+void VirtualDisplayDelegate::GetDisplays(
+    const ui::GetDisplaysCallback& callback) {
+  std::vector<ui::DisplaySnapshot*> displays;
+  for (const auto& display : displays_)
+    displays.push_back(display.get());
+  callback.Run(displays);
+}
+
+void VirtualDisplayDelegate::AddMode(const ui::DisplaySnapshot& output,
+                                     const ui::DisplayMode* mode) {}
+
+void VirtualDisplayDelegate::Configure(const ui::DisplaySnapshot& output,
+                                       const ui::DisplayMode* mode,
+                                       const gfx::Point& origin,
+                                       const ui::ConfigureCallback& callback) {
+  callback.Run(true);
+}
+
+void VirtualDisplayDelegate::CreateFrameBuffer(const gfx::Size& size) {}
+
+void VirtualDisplayDelegate::GetHDCPState(
+    const ui::DisplaySnapshot& output,
+    const ui::GetHDCPStateCallback& callback) {
+  callback.Run(false, ui::HDCP_STATE_UNDESIRED);
+}
+
+void VirtualDisplayDelegate::SetHDCPState(
+    const ui::DisplaySnapshot& output,
+    ui::HDCPState state,
+    const ui::SetHDCPStateCallback& callback) {
+  callback.Run(false);
+}
+
+std::vector<ui::ColorCalibrationProfile>
+VirtualDisplayDelegate::GetAvailableColorCalibrationProfiles(
+    const ui::DisplaySnapshot& output) {
+  return std::vector<ui::ColorCalibrationProfile>();
+}
+
+bool VirtualDisplayDelegate::SetColorCalibrationProfile(
+    const ui::DisplaySnapshot& output,
+    ui::ColorCalibrationProfile new_profile) {
+  return false;
+}
+
+bool VirtualDisplayDelegate::SetColorCorrection(
+    const ui::DisplaySnapshot& output,
+    const std::vector<ui::GammaRampRGBEntry>& degamma_lut,
+    const std::vector<ui::GammaRampRGBEntry>& gamma_lut,
+    const std::vector<float>& correction_matrix) {
+  return false;
+}
+
+void VirtualDisplayDelegate::AddObserver(ui::NativeDisplayObserver* observer) {
+  observers_.AddObserver(observer);
+}
+
+void VirtualDisplayDelegate::RemoveObserver(
+    ui::NativeDisplayObserver* observer) {
+  observers_.RemoveObserver(observer);
+}
+
+VirtualDisplayController*
+VirtualDisplayDelegate::GetVirtualDisplayController() {
+  return static_cast<VirtualDisplayController*>(this);
+}
+
+void VirtualDisplayDelegate::InitFromCommandLine() {
+  base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
+  if (!command_line->HasSwitch(switches::kDisplayBounds))
+    return;
+
+  const std::string command_string =
+      command_line->GetSwitchValueASCII(switches::kDisplayBounds);
+  for (std::string part : base::SplitString(
+           command_string, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL)) {
+    int width = 0;
+    int height = 0;
+    if (sscanf(part.c_str(), "%dx%d", &width, &height) >= 2) {
+      gfx::Size display_size(width, height);
+      AddVirtualDisplay(display_size);
+    } else {
+      LOG(WARNING) << "Failed to parse display \"" << part << "\"";
+    }
+  }
+}
+
+void VirtualDisplayDelegate::OnConfigurationChanged() {
+  if (!initialized_)
+    return;
+
+  FOR_EACH_OBSERVER(ui::NativeDisplayObserver, observers_,
+                    OnConfigurationChanged());
+}
+
+}  // namespace display