root/Source/core/html/HTMLMarqueeElement.cpp

DEFINITIONS

1. ActiveDOMObject
2. create
3. minimumDelay
4. didMoveToNewDocument
5. isPresentationAttribute
6. collectStyleForPresentationAttribute
7. start
8. stop
9. scrollAmount
10. setScrollAmount
11. scrollDelay
12. setScrollDelay
13. loop
14. setLoop
15. suspend
16. resume
17. renderMarquee
18. createRenderer
19. timerFired

/*
 * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
 *           (C) 1999 Antti Koivisto (koivisto@kde.org)
 * Copyright (C) 2003, 2007, 2010 Apple Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 */

#include "config.h"
#include "core/html/HTMLMarqueeElement.h"

#include "CSSPropertyNames.h"
#include "CSSValueKeywords.h"
#include "HTMLNames.h"
#include "bindings/v8/ExceptionState.h"
#include "core/dom/ExceptionCode.h"
#include "core/rendering/RenderMarquee.h"

namespace WebCore {

using namespace HTMLNames;

inline HTMLMarqueeElement::HTMLMarqueeElement(Document& document)
    : HTMLElement(marqueeTag, document)
    , ActiveDOMObject(&document)
{
    ScriptWrappable::init(this);
}

PassRefPtr<HTMLMarqueeElement> HTMLMarqueeElement::create(Document& document)
{
    RefPtr<HTMLMarqueeElement> marqueeElement(adoptRef(new HTMLMarqueeElement(document)));
    marqueeElement->suspendIfNeeded();
    return marqueeElement.release();
}

int HTMLMarqueeElement::minimumDelay() const
{
    if (fastGetAttribute(truespeedAttr).isEmpty()) {
        // WinIE uses 60ms as the minimum delay by default.
        return 60;
    }
    return 0;
}

void HTMLMarqueeElement::didMoveToNewDocument(Document& oldDocument)
{
    ActiveDOMObject::didMoveToNewExecutionContext(&document());
    HTMLElement::didMoveToNewDocument(oldDocument);
}

bool HTMLMarqueeElement::isPresentationAttribute(const QualifiedName& name) const
{
    if (name == widthAttr || name == heightAttr || name == bgcolorAttr || name == vspaceAttr || name == hspaceAttr || name == scrollamountAttr || name == scrolldelayAttr || name == loopAttr || name == behaviorAttr || name == directionAttr)
        return true;
    return HTMLElement::isPresentationAttribute(name);
}

void HTMLMarqueeElement::collectStyleForPresentationAttribute(const QualifiedName& name, const AtomicString& value, MutableStylePropertySet* style)
{
    if (name == widthAttr) {
        if (!value.isEmpty())
            addHTMLLengthToStyle(style, CSSPropertyWidth, value);
    } else if (name == heightAttr) {
        if (!value.isEmpty())
            addHTMLLengthToStyle(style, CSSPropertyHeight, value);
    } else if (name == bgcolorAttr) {
        if (!value.isEmpty())
            addHTMLColorToStyle(style, CSSPropertyBackgroundColor, value);
    } else if (name == vspaceAttr) {
        if (!value.isEmpty()) {
            addHTMLLengthToStyle(style, CSSPropertyMarginTop, value);
            addHTMLLengthToStyle(style, CSSPropertyMarginBottom, value);
        }
    } else if (name == hspaceAttr) {
        if (!value.isEmpty()) {
            addHTMLLengthToStyle(style, CSSPropertyMarginLeft, value);
            addHTMLLengthToStyle(style, CSSPropertyMarginRight, value);
        }
    } else if (name == scrollamountAttr) {
        if (!value.isEmpty())
            addHTMLLengthToStyle(style, CSSPropertyInternalMarqueeIncrement, value);
    } else if (name == scrolldelayAttr) {
        if (!value.isEmpty())
            addHTMLLengthToStyle(style, CSSPropertyInternalMarqueeSpeed, value);
    } else if (name == loopAttr) {
        if (!value.isEmpty()) {
            if (value == "-1" || equalIgnoringCase(value, "infinite"))
                addPropertyToPresentationAttributeStyle(style, CSSPropertyInternalMarqueeRepetition, CSSValueInfinite);
            else
                addHTMLLengthToStyle(style, CSSPropertyInternalMarqueeRepetition, value);
        }
    } else if (name == behaviorAttr) {
        if (!value.isEmpty())
            addPropertyToPresentationAttributeStyle(style, CSSPropertyInternalMarqueeStyle, value);
    } else if (name == directionAttr) {
        if (!value.isEmpty())
            addPropertyToPresentationAttributeStyle(style, CSSPropertyInternalMarqueeDirection, value);
    } else
        HTMLElement::collectStyleForPresentationAttribute(name, value, style);
}

void HTMLMarqueeElement::start()
{
    if (RenderMarquee* marqueeRenderer = renderMarquee())
        marqueeRenderer->start();
}

void HTMLMarqueeElement::stop()
{
    if (RenderMarquee* marqueeRenderer = renderMarquee())
        marqueeRenderer->stop();
}

int HTMLMarqueeElement::scrollAmount() const
{
    bool ok;
    int scrollAmount = fastGetAttribute(scrollamountAttr).toInt(&ok);
    return ok && scrollAmount >= 0 ? scrollAmount : RenderStyle::initialMarqueeIncrement().intValue();
}

void HTMLMarqueeElement::setScrollAmount(int scrollAmount, ExceptionState& exceptionState)
{
    if (scrollAmount < 0)
        exceptionState.throwDOMException(IndexSizeError, "The provided value (" + String::number(scrollAmount) + ") is negative.");
    else
        setIntegralAttribute(scrollamountAttr, scrollAmount);
}

int HTMLMarqueeElement::scrollDelay() const
{
    bool ok;
    int scrollDelay = fastGetAttribute(scrolldelayAttr).toInt(&ok);
    return ok && scrollDelay >= 0 ? scrollDelay : RenderStyle::initialMarqueeSpeed();
}

void HTMLMarqueeElement::setScrollDelay(int scrollDelay, ExceptionState& exceptionState)
{
    if (scrollDelay < 0)
        exceptionState.throwDOMException(IndexSizeError, "The provided value (" + String::number(scrollDelay) + ") is negative.");
    else
        setIntegralAttribute(scrolldelayAttr, scrollDelay);
}

int HTMLMarqueeElement::loop() const
{
    bool ok;
    int loopValue = fastGetAttribute(loopAttr).toInt(&ok);
    return ok && loopValue > 0 ? loopValue : -1;
}

void HTMLMarqueeElement::setLoop(int loop, ExceptionState& exceptionState)
{
    if (loop <= 0 && loop != -1)
        exceptionState.throwDOMException(IndexSizeError, "The provided value (" + String::number(loop) + ") is neither positive nor -1.");
    else
        setIntegralAttribute(loopAttr, loop);
}

void HTMLMarqueeElement::suspend()
{
    if (RenderMarquee* marqueeRenderer = renderMarquee())
        marqueeRenderer->suspend();
}

void HTMLMarqueeElement::resume()
{
    if (RenderMarquee* marqueeRenderer = renderMarquee())
        marqueeRenderer->updateMarqueePosition();
}

RenderMarquee* HTMLMarqueeElement::renderMarquee() const
{
    if (renderer() && renderer()->isMarquee())
        return toRenderMarquee(renderer());
    return 0;
}

RenderObject* HTMLMarqueeElement::createRenderer(RenderStyle*)
{
    return new RenderMarquee(this);
}

void HTMLMarqueeElement::timerFired(Timer<HTMLMarqueeElement>*)
{
    if (!renderer())
        return;

    document().updateLayout();

    // The updateLayout() could have destroyed renderer(), so this re-check is very important.
    if (renderer())
        toRenderMarquee(renderer())->timerFired();
}

} // namespace WebCore