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XSLImportRule.cpp
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122 lines (97 loc) · 3.77 KB
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/*
* This file is part of the XSL implementation.
*
* Copyright (C) 2004-2017 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 "XSLImportRule.h"
#if ENABLE(XSLT)
#include "CachedXSLStyleSheet.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "Document.h"
namespace WebCore {
XSLImportRule::XSLImportRule(XSLStyleSheet* parent, const String& href)
: m_parentStyleSheet(parent)
, m_strHref(href)
, m_cachedSheet(nullptr)
, m_loading(false)
{
}
XSLImportRule::~XSLImportRule()
{
if (m_styleSheet)
m_styleSheet->setParentStyleSheet(nullptr);
if (m_cachedSheet)
m_cachedSheet->removeClient(*this);
}
void XSLImportRule::setXSLStyleSheet(const String& href, const URL& baseURL, const String& sheet)
{
if (m_styleSheet)
m_styleSheet->setParentStyleSheet(nullptr);
m_styleSheet = XSLStyleSheet::create(this, href, baseURL);
XSLStyleSheet* parent = parentStyleSheet();
if (parent)
m_styleSheet->setParentStyleSheet(parent);
m_styleSheet->parseString(sheet);
m_loading = false;
if (parent)
parent->checkLoaded();
}
bool XSLImportRule::isLoading()
{
return (m_loading || (m_styleSheet && m_styleSheet->isLoading()));
}
void XSLImportRule::loadSheet()
{
CachedResourceLoader* cachedResourceLoader = nullptr;
XSLStyleSheet* rootSheet = parentStyleSheet();
if (rootSheet) {
while (XSLStyleSheet* parentSheet = rootSheet->parentStyleSheet())
rootSheet = parentSheet;
}
if (rootSheet)
cachedResourceLoader = rootSheet->cachedResourceLoader();
String absHref = m_strHref;
XSLStyleSheet* parentSheet = parentStyleSheet();
if (!parentSheet->baseURL().isNull())
// use parent styleheet's URL as the base URL
absHref = URL(parentSheet->baseURL(), 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.
for (XSLStyleSheet* parentSheet = parentStyleSheet(); parentSheet; parentSheet = parentSheet->parentStyleSheet()) {
if (absHref == parentSheet->baseURL().string())
return;
}
if (m_cachedSheet)
m_cachedSheet->removeClient(*this);
auto options = CachedResourceLoader::defaultCachedResourceOptions();
options.mode = FetchOptions::Mode::SameOrigin;
m_cachedSheet = cachedResourceLoader->requestXSLStyleSheet({ResourceRequest(cachedResourceLoader->document()->completeURL(absHref)), options}).value_or(nullptr);
if (m_cachedSheet) {
m_cachedSheet->addClient(*this);
// If the imported sheet is in the cache, then setXSLStyleSheet gets called,
// and the sheet even gets parsed (via parseString). In this case we have
// loaded (even if our subresources haven't), so if we have a stylesheet after
// checking the cache, then we've clearly loaded.
if (!m_styleSheet)
m_loading = true;
}
}
} // namespace WebCore
#endif // ENABLE(XSLT)