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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 #include "core/rendering/RenderProgress.h"
     24 
     25 #include "core/html/HTMLProgressElement.h"
     26 #include "core/rendering/RenderTheme.h"
     27 #include "wtf/CurrentTime.h"
     28 #include "wtf/RefPtr.h"
     29 
     30 using namespace std;
     31 
     32 namespace WebCore {
     33 
     34 RenderProgress::RenderProgress(HTMLElement* element)
     35     : RenderBlockFlow(element)
     36     , m_position(HTMLProgressElement::InvalidPosition)
     37     , m_animationStartTime(0)
     38     , m_animationRepeatInterval(0)
     39     , m_animationDuration(0)
     40     , m_animating(false)
     41     , m_animationTimer(this, &RenderProgress::animationTimerFired)
     42 {
     43 }
     44 
     45 RenderProgress::~RenderProgress()
     46 {
     47 }
     48 
     49 void RenderProgress::updateFromElement()
     50 {
     51     HTMLProgressElement* element = progressElement();
     52     if (m_position == element->position())
     53         return;
     54     m_position = element->position();
     55 
     56     updateAnimationState();
     57     repaint();
     58     RenderBlock::updateFromElement();
     59 }
     60 
     61 double RenderProgress::animationProgress() const
     62 {
     63     return m_animating ? (fmod((currentTime() - m_animationStartTime), m_animationDuration) / m_animationDuration) : 0;
     64 }
     65 
     66 bool RenderProgress::isDeterminate() const
     67 {
     68     return (HTMLProgressElement::IndeterminatePosition != position()
     69             && HTMLProgressElement::InvalidPosition != position());
     70 }
     71 
     72 void RenderProgress::animationTimerFired(Timer<RenderProgress>*)
     73 {
     74     repaint();
     75     if (!m_animationTimer.isActive() && m_animating)
     76         m_animationTimer.startOneShot(m_animationRepeatInterval);
     77 }
     78 
     79 void RenderProgress::updateAnimationState()
     80 {
     81     m_animationDuration = RenderTheme::theme().animationDurationForProgressBar(this);
     82     m_animationRepeatInterval = RenderTheme::theme().animationRepeatIntervalForProgressBar(this);
     83 
     84     bool animating = style()->hasAppearance() && m_animationDuration > 0;
     85     if (animating == m_animating)
     86         return;
     87 
     88     m_animating = animating;
     89     if (m_animating) {
     90         m_animationStartTime = currentTime();
     91         m_animationTimer.startOneShot(m_animationRepeatInterval);
     92     } else
     93         m_animationTimer.stop();
     94 }
     95 
     96 HTMLProgressElement* RenderProgress::progressElement() const
     97 {
     98     if (!node())
     99         return 0;
    100 
    101     if (isHTMLProgressElement(node()))
    102         return toHTMLProgressElement(node());
    103 
    104     ASSERT(node()->shadowHost());
    105     return toHTMLProgressElement(node()->shadowHost());
    106 }
    107 
    108 } // namespace WebCore
    109