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      1 /*
      2  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
      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(PROGRESS_TAG)
     24 
     25 #include "RenderProgress.h"
     26 
     27 #include "HTMLNames.h"
     28 #include "HTMLProgressElement.h"
     29 #include "PaintInfo.h"
     30 #include "RenderTheme.h"
     31 #include "ShadowElement.h"
     32 #include <wtf/CurrentTime.h>
     33 #include <wtf/RefPtr.h>
     34 
     35 using namespace std;
     36 
     37 namespace WebCore {
     38 
     39 RenderProgress::RenderProgress(HTMLProgressElement* element)
     40     : RenderBlock(element)
     41     , m_position(HTMLProgressElement::InvalidPosition)
     42     , m_animationStartTime(0)
     43     , m_animationRepeatInterval(0)
     44     , m_animationDuration(0)
     45     , m_animating(false)
     46     , m_animationTimer(this, &RenderProgress::animationTimerFired)
     47 {
     48 }
     49 
     50 RenderProgress::~RenderProgress()
     51 {
     52 }
     53 
     54 void RenderProgress::updateFromElement()
     55 {
     56     HTMLProgressElement* element = progressElement();
     57     if (m_position == element->position())
     58         return;
     59     m_position = element->position();
     60 
     61     updateAnimationState();
     62     RenderBlock::updateFromElement();
     63 }
     64 
     65 double RenderProgress::animationProgress() const
     66 {
     67     return m_animating ? (fmod((currentTime() - m_animationStartTime), m_animationDuration) / m_animationDuration) : 0;
     68 }
     69 
     70 bool RenderProgress::isDeterminate() const
     71 {
     72     return (HTMLProgressElement::IndeterminatePosition != position()
     73             && HTMLProgressElement::InvalidPosition != position());
     74 }
     75 
     76 void RenderProgress::animationTimerFired(Timer<RenderProgress>*)
     77 {
     78     repaint();
     79     if (!m_animationTimer.isActive() && m_animating)
     80         m_animationTimer.startOneShot(m_animationRepeatInterval);
     81 }
     82 
     83 void RenderProgress::updateAnimationState()
     84 {
     85     m_animationDuration = theme()->animationDurationForProgressBar(this);
     86     m_animationRepeatInterval = theme()->animationRepeatIntervalForProgressBar(this);
     87 
     88     bool animating = style()->hasAppearance() && m_animationDuration > 0;
     89     if (animating == m_animating)
     90         return;
     91 
     92     m_animating = animating;
     93     if (m_animating) {
     94         m_animationStartTime = currentTime();
     95         m_animationTimer.startOneShot(m_animationRepeatInterval);
     96     } else
     97         m_animationTimer.stop();
     98 }
     99 
    100 HTMLProgressElement* RenderProgress::progressElement() const
    101 {
    102     return static_cast<HTMLProgressElement*>(node());
    103 }
    104 
    105 } // namespace WebCore
    106 
    107 #endif
    108