Source/WebCore/css/WebKitCSSKeyframesRule.cpp

/*
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 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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#include "config.h"
#include "WebKitCSSKeyframesRule.h"

#include "CSSMutableStyleDeclaration.h"
#include "CSSParser.h"
#include "CSSRuleList.h"
#include "StyleSheet.h"
#include "WebKitCSSKeyframeRule.h"

namespace WebCore {

WebKitCSSKeyframesRule::WebKitCSSKeyframesRule(CSSStyleSheet* parent)
    : CSSRule(parent, CSSRule::WEBKIT_KEYFRAMES_RULE)
    , m_lstCSSRules(CSSRuleList::create())
{
}

WebKitCSSKeyframesRule::~WebKitCSSKeyframesRule()
{
    for (unsigned i = 0; i < length(); ++i) {
        WebKitCSSKeyframeRule* rule = item(i);
        if (CSSMutableStyleDeclaration* style = rule->style())
            style->setParentRule(0);
        rule->setParentRule(0);
    }
}

void WebKitCSSKeyframesRule::setName(const String& name)
{
    m_name = name;

    // Since the name is used in the keyframe map list in CSSStyleSelector, we need
    // to recompute the style sheet to get the updated name.
    if (CSSStyleSheet* styleSheet = parentStyleSheet())
        styleSheet->styleSheetChanged();
}

WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::item(unsigned index)
{
    CSSRule* rule = m_lstCSSRules->item(index);
    ASSERT(rule->isKeyframeRule());
    return static_cast<WebKitCSSKeyframeRule*>(rule);
}

const WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::item(unsigned index) const
{
    const CSSRule* rule = m_lstCSSRules->item(index);
    ASSERT(rule->isKeyframeRule());
    return static_cast<const WebKitCSSKeyframeRule*>(rule);
}

void WebKitCSSKeyframesRule::append(WebKitCSSKeyframeRule* rule)
{
    if (!rule)
        return;

    m_lstCSSRules->append(rule);
    rule->setParentRule(this);

    if (CSSMutableStyleDeclaration* style = rule->style())
        style->setParentRule(this);
}

void WebKitCSSKeyframesRule::insertRule(const String& rule)
{
    CSSParser p(useStrictParsing());
    RefPtr<WebKitCSSKeyframeRule> newRule = p.parseKeyframeRule(parentStyleSheet(), rule);
    if (newRule)
        append(newRule.get());
}

void WebKitCSSKeyframesRule::deleteRule(const String& s)
{
    int i = findRuleIndex(s);
    if (i < 0)
        return;

    WebKitCSSKeyframeRule* rule = item(i);
    if (CSSMutableStyleDeclaration* style = rule->style())
        style->setParentRule(0);

    rule->setParentRule(0);
    m_lstCSSRules->deleteRule(i);
}

WebKitCSSKeyframeRule* WebKitCSSKeyframesRule::findRule(const String& s)
{
    int i = findRuleIndex(s);
    return (i >= 0) ? item(i) : 0;
}

int WebKitCSSKeyframesRule::findRuleIndex(const String& key) const
{
    String percentageString;
    if (equalIgnoringCase(key, "from"))
        percentageString = "0%";
    else if (equalIgnoringCase(key, "to"))
        percentageString = "100%";
    else
        percentageString = key;

    for (unsigned i = 0; i < length(); ++i) {
        if (item(i)->keyText() == percentageString)
            return i;
    }

    return -1;
}

String WebKitCSSKeyframesRule::cssText() const
{
    String result = "@-webkit-keyframes ";
    result += m_name;
    result += " { \n";

    if (m_lstCSSRules)
        result += m_lstCSSRules->rulesText();

    result += "}";
    return result;
}

} // namespace WebCore