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      1 /*
      2  * Copyright (C) 2007 Apple Inc.  All rights reserved.
      3  * Copyright (C) 2009 Torch Mobile Inc. http://www.torchmobile.com/
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1.  Redistributions of source code must retain the above copyright
     10  *     notice, this list of conditions and the following disclaimer.
     11  * 2.  Redistributions in binary form must reproduce the above copyright
     12  *     notice, this list of conditions and the following disclaimer in the
     13  *     documentation and/or other materials provided with the distribution.
     14  * 3.  Neither the name of Apple Computer, Inc. ("Apple") nor the names of
     15  *     its contributors may be used to endorse or promote products derived
     16  *     from this software without specific prior written permission.
     17  *
     18  * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY
     19  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     20  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     21  * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     22  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     23  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     24  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
     25  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     28  */
     29 
     30 #ifndef WorkQueueItemQt_h
     31 #define WorkQueueItemQt_h
     32 
     33 #include <QPointer>
     34 #include <QString>
     35 #include <qwebframe.h>
     36 #include <qwebpage.h>
     37 
     38 class WorkQueueItem {
     39 public:
     40     WorkQueueItem(QWebPage *page) : m_webPage(page) {}
     41     virtual ~WorkQueueItem() { }
     42     virtual bool invoke() const = 0;
     43 
     44 protected:
     45     QPointer<QWebPage> m_webPage;
     46 };
     47 
     48 class LoadItem : public WorkQueueItem {
     49 public:
     50     LoadItem(const QString &url, const QString &target, QWebPage *page)
     51         : WorkQueueItem(page)
     52         , m_url(url)
     53         , m_target(target)
     54     {
     55     }
     56 
     57     QString url() const { return m_url; }
     58     QString target() const { return m_target; }
     59 
     60     virtual bool invoke() const;
     61 
     62 private:
     63     QString m_url;
     64     QString m_target;
     65 };
     66 
     67 class ReloadItem : public WorkQueueItem {
     68 public:
     69     ReloadItem(QWebPage *page)
     70         : WorkQueueItem(page)
     71     {
     72     }
     73     virtual bool invoke() const;
     74 };
     75 
     76 class ScriptItem : public WorkQueueItem {
     77 public:
     78     ScriptItem(const QString &script, QWebPage *page)
     79         : WorkQueueItem(page)
     80         , m_script(script)
     81     {
     82     }
     83 
     84     QString script() const { return m_script; }
     85 
     86     virtual bool invoke() const;
     87 
     88 private:
     89     QString m_script;
     90 };
     91 
     92 class LoadingScriptItem : public ScriptItem {
     93 public:
     94     LoadingScriptItem(const QString& script, QWebPage* page)
     95         : ScriptItem(script, page)
     96     {
     97     }
     98 
     99     virtual bool invoke() const { return ScriptItem::invoke(); }
    100 };
    101 
    102 class NonLoadingScriptItem : public ScriptItem {
    103 public:
    104     NonLoadingScriptItem(const QString& script, QWebPage* page)
    105         : ScriptItem(script, page)
    106     {
    107     }
    108 
    109     virtual bool invoke() const { ScriptItem::invoke(); return false; }
    110 };
    111 
    112 
    113 class BackForwardItem : public WorkQueueItem {
    114 public:
    115     virtual bool invoke() const;
    116 
    117 protected:
    118     BackForwardItem(int howFar, QWebPage *page)
    119         : WorkQueueItem(page)
    120         , m_howFar(howFar)
    121     {
    122     }
    123 
    124     int m_howFar;
    125 };
    126 
    127 class BackItem : public BackForwardItem {
    128 public:
    129     BackItem(unsigned howFar, QWebPage *page)
    130         : BackForwardItem(-howFar, page)
    131     {
    132     }
    133 };
    134 
    135 class ForwardItem : public BackForwardItem {
    136 public:
    137     ForwardItem(unsigned howFar, QWebPage *page)
    138         : BackForwardItem(howFar, page)
    139     {
    140     }
    141 };
    142 
    143 #endif // !defined(WorkQueueItemQt_h)
    144