Split //ui/display and create //ui/display/manager.

ui/display/chromeos/x11/native_display_event_dispatcher_x11.cc

-// 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.
-
-#include "ui/display/chromeos/x11/native_display_event_dispatcher_x11.h"
-
-#include <X11/extensions/Xrandr.h>
-#include <utility>
-
-#include "base/time/default_tick_clock.h"
-#include "ui/display/chromeos/x11/display_mode_x11.h"
-#include "ui/display/chromeos/x11/display_snapshot_x11.h"
-#include "ui/events/platform/platform_event_source.h"
-
-namespace ui {
-
-// static
-const int NativeDisplayEventDispatcherX11::kUseCacheAfterStartupMs = 7000;
-
-NativeDisplayEventDispatcherX11::NativeDisplayEventDispatcherX11(
-    NativeDisplayDelegateX11::HelperDelegate* delegate,
-    int xrandr_event_base)
-    : delegate_(delegate),
-      xrandr_event_base_(xrandr_event_base),
-      tick_clock_(new base::DefaultTickClock) {
-  startup_time_ = tick_clock_->NowTicks();
-}
-
-NativeDisplayEventDispatcherX11::~NativeDisplayEventDispatcherX11() {}
-
-bool NativeDisplayEventDispatcherX11::CanDispatchEvent(
-    const PlatformEvent& event) {
-  return (event->type - xrandr_event_base_ == RRScreenChangeNotify) ||
-         (event->type - xrandr_event_base_ == RRNotify);
-}
-
-uint32_t NativeDisplayEventDispatcherX11::DispatchEvent(
-    const PlatformEvent& event) {
-  if (event->type - xrandr_event_base_ == RRScreenChangeNotify) {
-    VLOG(1) << "Received RRScreenChangeNotify event";
-    delegate_->UpdateXRandRConfiguration(event);
-    return ui::POST_DISPATCH_PERFORM_DEFAULT;
-  }
-
-  // Bail out early for everything except RRNotify_OutputChange events
-  // about an output getting connected or disconnected.
-  if (event->type - xrandr_event_base_ != RRNotify)
-    return ui::POST_DISPATCH_PERFORM_DEFAULT;
-  const XRRNotifyEvent* notify_event = reinterpret_cast<XRRNotifyEvent*>(event);
-  if (notify_event->subtype != RRNotify_OutputChange)
-    return ui::POST_DISPATCH_PERFORM_DEFAULT;
-  const XRROutputChangeNotifyEvent* output_change_event =
-      reinterpret_cast<XRROutputChangeNotifyEvent*>(event);
-  const int action = output_change_event->connection;
-  if (action != RR_Connected && action != RR_Disconnected)
-    return ui::POST_DISPATCH_PERFORM_DEFAULT;
-
-  const bool connected = (action == RR_Connected);
-  VLOG(1) << "Received RRNotify_OutputChange event:"
-          << " output=" << output_change_event->output
-          << " crtc=" << output_change_event->crtc
-          << " mode=" << output_change_event->mode
-          << " action=" << (connected ? "connected" : "disconnected");
-
-  bool check_cache = (tick_clock_->NowTicks() - startup_time_)
-                         .InMilliseconds() <= kUseCacheAfterStartupMs;
-
-  if (check_cache) {
-    bool found_changed_output = false;
-    const std::vector<DisplaySnapshot*>& cached_outputs =
-        delegate_->GetCachedDisplays();
-    for (std::vector<DisplaySnapshot*>::const_iterator it =
-             cached_outputs.begin();
-         it != cached_outputs.end();
-         ++it) {
-      const DisplaySnapshotX11* x11_output =
-          static_cast<const DisplaySnapshotX11*>(*it);
-      const DisplayModeX11* x11_mode =
-          static_cast<const DisplayModeX11*>(x11_output->current_mode());
-      RRMode mode_id = x11_mode ? x11_mode->mode_id() : None;
-
-      // Update if we failed to fetch the external display's ID before.
-      // Internal display's EDID should always be available.
-      bool display_id_needs_update =
-          x11_output->type() != ui::DISPLAY_CONNECTION_TYPE_INTERNAL &&
-          !x11_output->display_id();
-
-      if (x11_output->output() == output_change_event->output) {
-        if (connected && x11_output->crtc() == output_change_event->crtc &&
-            mode_id == output_change_event->mode &&
-            !display_id_needs_update) {
-          VLOG(1) << "Ignoring event describing already-cached state";
-          return POST_DISPATCH_PERFORM_DEFAULT;
-        }
-        found_changed_output = true;
-        break;
-      }
-    }
-
-    if (!connected && !found_changed_output) {
-      VLOG(1) << "Ignoring event describing already-disconnected output";
-      return ui::POST_DISPATCH_PERFORM_DEFAULT;
-    }
-  }
-
-  delegate_->NotifyDisplayObservers();
-
-  return ui::POST_DISPATCH_PERFORM_DEFAULT;
-}
-
-void NativeDisplayEventDispatcherX11::SetTickClockForTest(
-    std::unique_ptr<base::TickClock> tick_clock) {
-  tick_clock_ = std::move(tick_clock);
-  startup_time_ = tick_clock_->NowTicks();
-}
-
-}  // namespace ui