third_party/WebKit/Source/core/layout/LayoutProgress.cpp

   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/layout/LayoutProgress.h"
  24
  25 #include "core/html/HTMLProgressElement.h"
  26 #include "core/layout/LayoutTheme.h"
  27 #include "wtf/CurrentTime.h"
  28 #include "wtf/RefPtr.h"
  29
  30 namespace blink {
  31
  32 LayoutProgress::LayoutProgress(HTMLElement* element)
  33     : LayoutBlockFlow(element)
  34     , m_position(HTMLProgressElement::InvalidPosition)
  35     , m_animationStartTime(0)
  36     , m_animationRepeatInterval(0)
  37     , m_animationDuration(0)
  38     , m_animating(false)
  39     , m_animationTimer(this, &LayoutProgress::animationTimerFired)
  40 {
  41 }
  42
  43 LayoutProgress::~LayoutProgress()
  44 {
  45 }
  46
  47 void LayoutProgress::willBeDestroyed()
  48 {
  49     if (m_animating) {
  50         m_animationTimer.stop();
  51         m_animating = false;
  52     }
  53     LayoutBlockFlow::willBeDestroyed();
  54 }
  55
  56 void LayoutProgress::updateFromElement()
  57 {
  58     HTMLProgressElement* element = progressElement();
  59     if (m_position == element->position())
  60         return;
  61     m_position = element->position();
  62
  63     updateAnimationState();
  64     setShouldDoFullPaintInvalidation();
  65     LayoutBlockFlow::updateFromElement();
  66 }
  67
  68 double LayoutProgress::animationProgress() const
  69 {
  70     return m_animating ? (fmod((currentTime() - m_animationStartTime), m_animationDuration) / m_animationDuration) : 0;
  71 }
  72
  73 bool LayoutProgress::isDeterminate() const
  74 {
  75     return (HTMLProgressElement::IndeterminatePosition != position()
  76         && HTMLProgressElement::InvalidPosition != position());
  77 }
  78
  79 void LayoutProgress::animationTimerFired(Timer<LayoutProgress>*)
  80 {
  81     setShouldDoFullPaintInvalidation();
  82     if (!m_animationTimer.isActive() && m_animating)
  83         m_animationTimer.startOneShot(m_animationRepeatInterval, FROM_HERE);
  84 }
  85
  86 void LayoutProgress::updateAnimationState()
  87 {
  88     m_animationDuration = LayoutTheme::theme().animationDurationForProgressBar();
  89     m_animationRepeatInterval = LayoutTheme::theme().animationRepeatIntervalForProgressBar();
  90
  91     bool animating = style()->hasAppearance() && m_animationDuration > 0;
  92     if (animating == m_animating)
  93         return;
  94
  95     m_animating = animating;
  96     if (m_animating) {
  97         m_animationStartTime = currentTime();
  98         m_animationTimer.startOneShot(m_animationRepeatInterval, FROM_HERE);
  99     } else {
 100         m_animationTimer.stop();
 101     }
 102 }
 103
 104 HTMLProgressElement* LayoutProgress::progressElement() const
 105 {
 106     if (!node())
 107         return nullptr;
 108
 109     if (isHTMLProgressElement(*node()))
 110         return toHTMLProgressElement(node());
 111
 112     ASSERT(node()->shadowHost());
 113     return toHTMLProgressElement(node()->shadowHost());
 114 }
 115
 116 } // namespace blink