1/*
2 * Copyright (C) 2010 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "InspectorFrontendClientLocal.h"
33
34#include "bindings/v8/ScriptObject.h"
35#include "core/inspector/InspectorController.h"
36#include "core/inspector/InspectorFrontendHost.h"
37#include "core/page/Page.h"
38#include "core/page/Settings.h"
39#include "core/platform/Timer.h"
40#include "public/platform/Platform.h"
41#include "public/platform/WebThread.h"
42#include <wtf/Deque.h>
43#include <wtf/text/WTFString.h>
44
45namespace WebCore {
46
47class InspectorBackendMessageQueue : public RefCounted<InspectorBackendMessageQueue> {
48    WTF_MAKE_FAST_ALLOCATED;
49public:
50    explicit InspectorBackendMessageQueue(InspectorController* inspectorController)
51        : m_inspectorController(inspectorController)
52    {
53    }
54
55    void dispatch(const String& message)
56    {
57        ASSERT(m_inspectorController);
58        m_messages.append(message);
59        schedule();
60    }
61
62    void stop()
63    {
64        m_inspectorController = 0;
65        m_messages.clear();
66    }
67
68private:
69    void schedule()
70    {
71        class TaskImpl : public WebKit::WebThread::Task {
72        public:
73            RefPtr<InspectorBackendMessageQueue> owner;
74            virtual void run()
75            {
76                owner->deliver();
77            }
78        };
79        TaskImpl* taskImpl = new TaskImpl;
80        taskImpl->owner = this;
81        WebKit::Platform::current()->currentThread()->postTask(taskImpl);
82    }
83
84    void deliver()
85    {
86        if (!m_inspectorController)
87            return;
88        if (!m_messages.isEmpty()) {
89            // Dispatch can lead to the timer destruction -> schedule the next shot first.
90            schedule();
91            m_inspectorController->dispatchMessageFromFrontend(m_messages.takeFirst());
92        }
93    }
94
95    InspectorController* m_inspectorController;
96    Deque<String> m_messages;
97};
98
99InspectorFrontendClientLocal::InspectorFrontendClientLocal(InspectorController* inspectorController, Page* frontendPage)
100    : m_inspectorController(inspectorController)
101    , m_frontendPage(frontendPage)
102{
103    m_frontendPage->settings()->setAllowFileAccessFromFileURLs(true);
104    m_messageQueue = adoptRef(new InspectorBackendMessageQueue(inspectorController));
105}
106
107InspectorFrontendClientLocal::~InspectorFrontendClientLocal()
108{
109    m_messageQueue->stop();
110    if (m_frontendHost)
111        m_frontendHost->disconnectClient();
112    m_frontendPage = 0;
113    m_inspectorController = 0;
114}
115
116void InspectorFrontendClientLocal::windowObjectCleared()
117{
118    if (m_frontendHost)
119        m_frontendHost->disconnectClient();
120    ScriptState* frontendScriptState = mainWorldScriptState(m_frontendPage->mainFrame());
121    m_frontendHost = InspectorFrontendHost::create(this, m_frontendPage);
122    ScriptGlobalObject::set(frontendScriptState, "InspectorFrontendHost", m_frontendHost.get());
123}
124
125void InspectorFrontendClientLocal::sendMessageToBackend(const String& message)
126{
127    m_messageQueue->dispatch(message);
128}
129
130} // namespace WebCore
131
132