Rename the remaining usage of Monitor to Display

chromeos/monitor/output_configurator.h

-// 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.
-
-#ifndef CHROMEOS_MONITOR_OUTPUT_CONFIGURATOR_H_
-#define CHROMEOS_MONITOR_OUTPUT_CONFIGURATOR_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/event_types.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop.h"
-#include "chromeos/chromeos_export.h"
-
-// Forward declarations for Xlib and Xrandr.
-// This is so unused X definitions don't pollute the namespace.
-typedef unsigned long XID;
-typedef XID Window;
-typedef XID RROutput;
-typedef XID RRCrtc;
-typedef XID RRMode;
-
-struct _XRRScreenResources;
-typedef _XRRScreenResources XRRScreenResources;
-
-namespace chromeos {
-
-// The information we need to cache from an output to implement operations such
-// as power state but also to eliminate duplicate operations within a given
-// action (determining which CRTC to use for a given output, for example).
-struct CachedOutputDescription {
-  RROutput output;
-  RRCrtc crtc;
-  RRMode mirror_mode;
-  RRMode ideal_mode;
-  int x;
-  int y;
-  bool is_connected;
-  bool is_powered_on;
-  bool is_internal;
-  unsigned long mm_width;
-  unsigned long mm_height;
-};
-
-// Used to describe the state of a multi-monitor configuration.
-enum State {
-  STATE_INVALID,
-  STATE_HEADLESS,
-  STATE_SINGLE,
-  STATE_DUAL_MIRROR,
-  STATE_DUAL_PRIMARY_ONLY,
-  STATE_DUAL_SECONDARY_ONLY,
-};
-
-// This class interacts directly with the underlying Xrandr API to manipulate
-// CTRCs and Outputs.  It will likely grow more state, over time, or expose
-// Output info in other ways as more of the Chrome display code grows up around
-// it.
-class CHROMEOS_EXPORT OutputConfigurator : public MessageLoop::Dispatcher {
- public:
-  OutputConfigurator();
-  virtual ~OutputConfigurator();
-
-  State output_state() const { return output_state_; }
-
-  // Called when the user hits ctrl-F4 to request a display mode change.
-  // This method should only return false if it was called in a single-head or
-  // headless mode.
-  bool CycleDisplayMode();
-
-  // Called when powerd notifies us that some set of displays should be turned
-  // on or off.  This requires enabling or disabling the CRTC associated with
-  // the display(s) in question so that the low power state is engaged.
-  bool ScreenPowerSet(bool power_on, bool all_displays);
-
-  // Force switching the display mode to |new_state|.  This method is used when
-  // the user explicitly changes the display mode in the options UI.  Returns
-  // false if it was called in a single-head or headless mode.
-  bool SetDisplayMode(State new_state);
-
-  // Called when an RRNotify event is received.  The implementation is
-  // interested in the cases of RRNotify events which correspond to output
-  // add/remove events.  Note that Output add/remove events are sent in response
-  // to our own reconfiguration operations so spurious events are common.
-  // Spurious events will have no effect.
-  virtual bool Dispatch(const base::NativeEvent& event) OVERRIDE;
-
- private:
-  // Updates |output_count_|, |output_cache_|, |mirror_supported_|,
-  // |primary_output_index_|, and |secondary_output_index_| with new data.
-  // Returns true if the update succeeded or false if it was skipped since no
-  // actual change was observed.
-  // Note that |output_state_| is not updated by this call.
-  bool TryRecacheOutputs(Display* display, XRRScreenResources* screen);
-
-  // Uses the data stored in |output_cache_| and the given |new_state| to
-  // configure the Xrandr interface and then updates |output_state_| to reflect
-  // the new state.
-  void UpdateCacheAndXrandrToState(Display* display,
-                                   XRRScreenResources* screen,
-                                   Window window,
-                                   State new_state);
-
-  // A helper to re-cache instance variable state and transition into the
-  // appropriate default state for the observed displays.
-  bool RecacheAndUseDefaultState();
-
-  // Checks the |primary_output_index_|, |secondary_output_index_|, and
-  // |mirror_supported_| to see how many displays are currently connected and
-  // returns the state which is most appropriate as a default state for those
-  // displays.
-  State GetDefaultState() const;
-
-  // Called during start-up to determine what the current state of the displays
-  // appears to be, by investigating how the outputs compare to the data stored
-  // in |output_cache_|.  Returns STATE_INVALID if the current display state
-  // doesn't match any supported state.  |output_cache_| must be up-to-date with
-  // regards to the state of X or this method may return incorrect results.
-  State InferCurrentState(Display* display, XRRScreenResources* screen) const;
-
-  // Scans the |output_cache_| to determine whether or not we are in a
-  // "projecting" state and then calls the DBus kSetIsProjectingMethod on powerd
-  // with the result.
-  void CheckIsProjectingAndNotify();
-
-  // This is detected by the constructor to determine whether or not we should
-  // be enabled.  If we aren't running on ChromeOS, we can't assume that the
-  // Xrandr X11 extension is supported.
-  // If this flag is set to false, any attempts to change the output
-  // configuration to immediately fail without changing the state.
-  bool is_running_on_chrome_os_;
-
-  // The number of outputs in the output_cache_ array.
-  int output_count_;
-
-  // The list of cached output descriptions (|output_count_| elements long).
-  scoped_array<CachedOutputDescription> output_cache_;
-
-  // True if |output_cache_| describes a permutation of outputs which support a
-  // mirrored device mode.
-  bool mirror_supported_;
-
-  // The index of the primary connected output in |output_cache_|.  -1 if there
-  // is no primary output.  This implies the machine currently has no outputs.
-  int primary_output_index_;
-
-  // The index of the secondary connected output in |output_cache_|.  -1 if
-  // there is no secondary output.  This implies the machine currently has one
-  // output.
-  int secondary_output_index_;
-
-  // The base of the event numbers used to represent XRandr events used in
-  // decoding events regarding output add/remove.
-  int xrandr_event_base_;
-
-  // The display state as derived from the outputs observed in |output_cache_|.
-  // This is used for rotating display modes.
-  State output_state_;
-
-  DISALLOW_COPY_AND_ASSIGN(OutputConfigurator);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_MONITOR_OUTPUT_CONFIGURATOR_H_