Refactoring display configuration state to allow generic state objects

ui/display/chromeos/x11/display_snapshot_x11.h

+// Copyright 2014 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.
+
+#ifndef UI_DISPLAY_CHROMEOS_X11_DISPLAY_SNAPSHOT_X11_H_
+#define UI_DISPLAY_CHROMEOS_X11_DISPLAY_SNAPSHOT_X11_H_
+
+#include "ui/display/chromeos/display_snapshot.h"
+
+// Forward declare from Xlib and Xrandr.
+typedef unsigned long XID;
+typedef XID RROutput;
+typedef XID RRCrtc;
+
+namespace ui {
+
+class DISPLAY_EXPORT DisplaySnapshotX11 : public DisplaySnapshot {
+ public:
+  DisplaySnapshotX11(int64_t display_id,
+                     bool has_proper_display_id,
+                     const gfx::Point& origin,
+                     const gfx::Size& physical_size,
+                     OutputType type,
+                     bool is_aspect_preserving_scaling,
+                     const std::vector<const DisplayMode*>& modes,
+                     const DisplayMode* current_mode,
+                     const DisplayMode* native_mode,
+                     RROutput output,
+                     RRCrtc crtc,
+                     int index);
+  virtual ~DisplaySnapshotX11();
+
+  RROutput output() const { return output_; }
+  RRCrtc crtc() const { return crtc_; }
+  int index() const { return index_; }
+
+  // DisplaySnapshot overrides:
+  virtual std::string GetDisplayName() OVERRIDE;
+  virtual bool GetOverscanFlag() OVERRIDE;
+  virtual std::string ToString() const OVERRIDE;
+
+ private:
+  RROutput output_;
+
+  // CRTC that should be used for this output. Not necessarily the CRTC
+  // that XRandR reports is currently being used.
+  RRCrtc crtc_;
+
+  // This output's index in the array returned by XRandR. Stable even as
+  // outputs are connected or disconnected.
+  int index_;
+
+  DISALLOW_COPY_AND_ASSIGN(DisplaySnapshotX11);
+};
+
+}  // namespace ui
+
+#endif  // UI_DISPLAY_CHROMEOS_X11_DISPLAY_SNAPSHOT_X11_H_