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      1 /**
      2  * Copyright (C) 2008 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     17  * Boston, MA 02110-1301, USA.
     18  *
     19  */
     20 
     21 #include "config.h"
     22 
     23 #if ENABLE(WML)
     24 #include "WMLPrevElement.h"
     25 
     26 #include "BackForwardController.h"
     27 #include "Page.h"
     28 #include "WMLCardElement.h"
     29 #include "WMLDocument.h"
     30 #include "WMLPageState.h"
     31 #include "WMLTimerElement.h"
     32 
     33 namespace WebCore {
     34 
     35 WMLPrevElement::WMLPrevElement(const QualifiedName& tagName, Document* doc)
     36     : WMLTaskElement(tagName, doc)
     37 {
     38 }
     39 
     40 PassRefPtr<WMLPrevElement> WMLPrevElement::create(const QualifiedName& tagName, Document* document)
     41 {
     42     return adoptRef(new WMLPrevElement(tagName, document));
     43 }
     44 
     45 WMLPrevElement::~WMLPrevElement()
     46 {
     47 }
     48 
     49 void WMLPrevElement::executeTask()
     50 {
     51     ASSERT(document()->isWMLDocument());
     52     WMLDocument* document = static_cast<WMLDocument*>(this->document());
     53 
     54     WMLPageState* pageState = wmlPageStateForDocument(document);
     55     if (!pageState)
     56         return;
     57 
     58     WMLCardElement* card = document->activeCard();
     59     if (!card)
     60         return;
     61 
     62     storeVariableState(pageState);
     63 
     64     // Stop the timer of the current card if it is active
     65     if (WMLTimerElement* eventTimer = card->eventTimer())
     66         eventTimer->stop();
     67 
     68     pageState->page()->backForward()->goBack();
     69 }
     70 
     71 }
     72 
     73 #endif
     74