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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 <X11/Xlib.h>
+
+#include "base/memory/singleton.h"
+
+namespace ui {
+
+// static
+XForeignWindowManager* XForeignWindowManager::GetInstance() {
+  return 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