1/*
2 * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
3 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public License
16 * along with this library; see the file COPYING.LIB.  If not, write to
17 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21#include "config.h"
22#include "PageGroupLoadDeferrer.h"
23
24#include "DocumentParser.h"
25#include "Frame.h"
26#include "Page.h"
27#include "PageGroup.h"
28#include "ScriptRunner.h"
29#include <wtf/HashSet.h>
30
31namespace WebCore {
32
33using namespace std;
34
35PageGroupLoadDeferrer::PageGroupLoadDeferrer(Page* page, bool deferSelf)
36{
37    const HashSet<Page*>& pages = page->group().pages();
38
39    HashSet<Page*>::const_iterator end = pages.end();
40    for (HashSet<Page*>::const_iterator it = pages.begin(); it != end; ++it) {
41        Page* otherPage = *it;
42        if ((deferSelf || otherPage != page)) {
43            if (!otherPage->defersLoading()) {
44                m_deferredFrames.append(otherPage->mainFrame());
45
46                // This code is not logically part of load deferring, but we do not want JS code executed beneath modal
47                // windows or sheets, which is exactly when PageGroupLoadDeferrer is used.
48                // NOTE: if PageGroupLoadDeferrer is ever used for tasks other than showing a modal window or sheet,
49                // the constructor will need to take a ActiveDOMObject::ReasonForSuspension.
50                for (Frame* frame = otherPage->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
51                    frame->document()->suspendScriptedAnimationControllerCallbacks();
52                    frame->document()->suspendActiveDOMObjects(ActiveDOMObject::WillShowDialog);
53                    frame->document()->scriptRunner()->suspend();
54                    if (DocumentParser* parser = frame->document()->parser())
55                        parser->suspendScheduledTasks();
56                }
57            }
58        }
59    }
60
61    size_t count = m_deferredFrames.size();
62    for (size_t i = 0; i < count; ++i)
63        if (Page* page = m_deferredFrames[i]->page())
64            page->setDefersLoading(true);
65}
66
67PageGroupLoadDeferrer::~PageGroupLoadDeferrer()
68{
69    for (size_t i = 0; i < m_deferredFrames.size(); ++i) {
70        if (Page* page = m_deferredFrames[i]->page()) {
71            page->setDefersLoading(false);
72
73            for (Frame* frame = page->mainFrame(); frame; frame = frame->tree()->traverseNext()) {
74                frame->document()->resumeActiveDOMObjects();
75                frame->document()->resumeScriptedAnimationControllerCallbacks();
76                frame->document()->scriptRunner()->resume();
77                if (DocumentParser* parser = frame->document()->parser())
78                    parser->resumeScheduledTasks();
79            }
80        }
81    }
82}
83
84
85} // namespace WebCore
86