Refactor X11ForeignWindowManager (Reland)

ui/base/x/x11_foreign_window_manager.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/base/x/x11_foreign_window_manager.h"
-
-#include <stddef.h>
-#include <X11/Xlib.h>
-
-#include "base/compiler_specific.h"
-#include "base/memory/singleton.h"
-
-namespace ui {
-
-// static
-XForeignWindowManager* XForeignWindowManager::GetInstance() {
-  return base::Singleton<XForeignWindowManager>::get();
-}
-
-int XForeignWindowManager::RequestEvents(XID xid, long event_mask) {
-  request_map_[xid].push_back(Request(next_request_id_, event_mask));
-  UpdateSelectedEvents(xid);
-  return next_request_id_++;
-}
-
-void XForeignWindowManager::CancelRequest(int request_id) {
-  for (std::map<XID, RequestVector>::iterator map_it = request_map_.begin();
-       map_it != request_map_.end(); ++map_it) {
-    RequestVector* vector = &map_it->second;
-    for (RequestVector::iterator vector_it = vector->begin();
-         vector_it != vector->end(); ++vector_it) {
-      if (vector_it->request_id == request_id) {
-        vector->erase(vector_it);
-        UpdateSelectedEvents(map_it->first);
-        if (vector->empty())
-          request_map_.erase(map_it);
-        return;
-      }
-    }
-  }
-}
-
-void XForeignWindowManager::OnWindowDestroyed(XID xid) {
-  request_map_.erase(xid);
-}
-
-XForeignWindowManager::XForeignWindowManager() : next_request_id_(0) {
-}
-
-XForeignWindowManager::~XForeignWindowManager() {
-}
-
-void XForeignWindowManager::UpdateSelectedEvents(XID xid) {
-  std::map<XID, RequestVector>::iterator it = request_map_.find(xid);
-  if (it == request_map_.end())
-    return;
-
-  long event_mask = NoEventMask;
-  const RequestVector& list = it->second;
-  for (size_t i = 0; i < list.size(); ++i)
-    event_mask |= list[i].event_mask;
-
-  XSelectInput(gfx::GetXDisplay(), xid, event_mask);
-}
-
-XForeignWindowManager::Request::Request(int request_id, long event_mask)
-    : request_id(request_id),
-      event_mask(event_mask) {
-}
-
-XForeignWindowManager::Request::~Request() {
-}
-
-}  // namespace ui