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/*
* (C) 1999-2003 Lars Knoll (knoll@kde.org)
* (C) 2002-2003 Dirk Mueller (mueller@kde.org)
* Copyright (C) 2002, 2005, 2006, 2008, 2009, 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 "CSSImportRule.h"
#include "CachedCSSStyleSheet.h"
#include "CachedResourceLoader.h"
#include "Document.h"
#include "SecurityOrigin.h"
#include "Settings.h"
#include <wtf/StdLibExtras.h>
namespace WebCore {
CSSImportRule::CSSImportRule(CSSStyleSheet* parent, const String& href, PassRefPtr<MediaList> media)
: CSSRule(parent)
, m_strHref(href)
, m_lstMedia(media)
, m_cachedSheet(0)
, m_loading(false)
{
if (m_lstMedia)
m_lstMedia->setParent(this);
else
m_lstMedia = MediaList::create(this, String());
}
CSSImportRule::~CSSImportRule()
{
if (m_lstMedia)
m_lstMedia->setParent(0);
if (m_styleSheet)
m_styleSheet->setParent(0);
if (m_cachedSheet)
m_cachedSheet->removeClient(this);
}
void CSSImportRule::setCSSStyleSheet(const String& href, const KURL& baseURL, const String& charset, const CachedCSSStyleSheet* sheet)
{
if (m_styleSheet)
m_styleSheet->setParent(0);
m_styleSheet = CSSStyleSheet::create(this, href, baseURL, charset);
bool crossOriginCSS = false;
bool validMIMEType = false;
CSSStyleSheet* parent = parentStyleSheet();
bool strict = !parent || parent->useStrictParsing();
bool enforceMIMEType = strict;
bool needsSiteSpecificQuirks = parent && parent->document() && parent->document()->settings() && parent->document()->settings()->needsSiteSpecificQuirks();
#ifdef BUILDING_ON_LEOPARD
if (enforceMIMEType && needsSiteSpecificQuirks) {
// Covers both http and https, with or without "www."
if (baseURL.string().contains("mcafee.com/japan/", false))
enforceMIMEType = false;
}
#endif
String sheetText = sheet->sheetText(enforceMIMEType, &validMIMEType);
m_styleSheet->parseString(sheetText, strict);
if (!parent || !parent->document() || !parent->document()->securityOrigin()->canRequest(baseURL))
crossOriginCSS = true;
if (crossOriginCSS && !validMIMEType && !m_styleSheet->hasSyntacticallyValidCSSHeader())
m_styleSheet = CSSStyleSheet::create(this, href, baseURL, charset);
if (strict && needsSiteSpecificQuirks) {
// Work around <https://bugs.webkit.org/show_bug.cgi?id=28350>.
DEFINE_STATIC_LOCAL(const String, slashKHTMLFixesDotCss, ("/KHTMLFixes.css"));
DEFINE_STATIC_LOCAL(const String, mediaWikiKHTMLFixesStyleSheet, ("/* KHTML fix stylesheet */\n/* work around the horizontal scrollbars */\n#column-content { margin-left: 0; }\n\n"));
// There are two variants of KHTMLFixes.css. One is equal to mediaWikiKHTMLFixesStyleSheet,
// while the other lacks the second trailing newline.
if (baseURL.string().endsWith(slashKHTMLFixesDotCss) && !sheetText.isNull() && mediaWikiKHTMLFixesStyleSheet.startsWith(sheetText)
&& sheetText.length() >= mediaWikiKHTMLFixesStyleSheet.length() - 1) {
ASSERT(m_styleSheet->length() == 1);
ExceptionCode ec;
m_styleSheet->deleteRule(0, ec);
}
}
m_loading = false;
if (parent)
parent->checkLoaded();
}
bool CSSImportRule::isLoading() const
{
return m_loading || (m_styleSheet && m_styleSheet->isLoading());
}
void CSSImportRule::insertedIntoParent()
{
CSSStyleSheet* parentSheet = parentStyleSheet();
if (!parentSheet || !parentSheet->document())
return;
CachedResourceLoader* cachedResourceLoader = parentSheet->document()->cachedResourceLoader();
if (!cachedResourceLoader)
return;
String absHref = m_strHref;
if (!parentSheet->finalURL().isNull())
// use parent styleheet's URL as the base URL
absHref = KURL(parentSheet->finalURL(), m_strHref).string();
// Check for a cycle in our import chain. If we encounter a stylesheet
// in our parent chain with the same URL, then just bail.
StyleBase* root = this;
for (StyleBase* curr = parent(); curr; curr = curr->parent()) {
// FIXME: This is wrong if the finalURL was updated via document::updateBaseURL.
if (curr->isCSSStyleSheet() && absHref == static_cast<CSSStyleSheet*>(curr)->finalURL().string())
return;
root = curr;
}
if (parentSheet->isUserStyleSheet())
m_cachedSheet = cachedResourceLoader->requestUserCSSStyleSheet(absHref, parentSheet->charset());
else
m_cachedSheet = cachedResourceLoader->requestCSSStyleSheet(absHref, parentSheet->charset());
if (m_cachedSheet) {
// if the import rule is issued dynamically, the sheet may be
// removed from the pending sheet count, so let the doc know
// the sheet being imported is pending.
if (parentSheet && parentSheet->loadCompleted() && root == parentSheet)
parentSheet->document()->addPendingSheet();
m_loading = true;
m_cachedSheet->addClient(this);
}
}
String CSSImportRule::cssText() const
{
String result = "@import url(\"";
result += m_strHref;
result += "\")";
if (m_lstMedia) {
result += " ";
result += m_lstMedia->mediaText();
}
result += ";";
return result;
}
void CSSImportRule::addSubresourceStyleURLs(ListHashSet<KURL>& urls)
{
if (m_styleSheet)
addSubresourceURL(urls, m_styleSheet->baseURL());
}
} // namespace WebCore
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