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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/inspector/InspectorResourceContentLoader.h"
#include "FetchInitiatorTypeNames.h"
#include "core/css/CSSStyleSheet.h"
#include "core/css/StyleSheetContents.h"
#include "core/fetch/CSSStyleSheetResource.h"
#include "core/fetch/Resource.h"
#include "core/fetch/ResourceFetcher.h"
#include "core/fetch/ResourcePtr.h"
#include "core/fetch/StyleSheetResourceClient.h"
#include "core/frame/LocalFrame.h"
#include "core/html/VoidCallback.h"
#include "core/inspector/InspectorCSSAgent.h"
#include "core/inspector/InspectorPageAgent.h"
#include "core/page/Page.h"
namespace WebCore {
class InspectorResourceContentLoader::ResourceClient FINAL : private StyleSheetResourceClient {
public:
ResourceClient(InspectorResourceContentLoader* loader)
: m_loader(loader)
{
}
void waitForResource(Resource* resource)
{
resource->addClient(this);
}
private:
InspectorResourceContentLoader* m_loader;
virtual void setCSSStyleSheet(const String&, const KURL&, const String&, const CSSStyleSheetResource*) OVERRIDE;
friend class InspectorResourceContentLoader;
};
void InspectorResourceContentLoader::ResourceClient::setCSSStyleSheet(const String&, const KURL& url, const String&, const CSSStyleSheetResource* resource)
{
if (m_loader)
m_loader->resourceFinished(this);
const_cast<CSSStyleSheetResource*>(resource)->removeClient(this);
delete this;
}
InspectorResourceContentLoader::InspectorResourceContentLoader(Page* page)
: m_allRequestsStarted(false)
{
Vector<Document*> documents;
for (Frame* frame = page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
if (!frame->isLocalFrame())
continue;
LocalFrame* localFrame = toLocalFrame(frame);
documents.append(localFrame->document());
documents.appendVector(InspectorPageAgent::importsForFrame(localFrame));
}
for (Vector<Document*>::const_iterator documentIt = documents.begin(); documentIt != documents.end(); ++documentIt) {
Document* document = *documentIt;
HashSet<String> urlsToFetch;
Vector<CSSStyleSheet*> styleSheets;
InspectorCSSAgent::collectAllDocumentStyleSheets(document, styleSheets);
for (Vector<CSSStyleSheet*>::const_iterator stylesheetIt = styleSheets.begin(); stylesheetIt != styleSheets.end(); ++stylesheetIt) {
CSSStyleSheet* styleSheet = *stylesheetIt;
if (styleSheet->isInline() || !styleSheet->contents()->loadCompleted())
continue;
String url = styleSheet->baseURL().string();
if (url.isEmpty() || urlsToFetch.contains(url))
continue;
urlsToFetch.add(url);
FetchRequest request(ResourceRequest(url), FetchInitiatorTypeNames::internal);
ResourcePtr<Resource> resource = document->fetcher()->fetchCSSStyleSheet(request);
// Prevent garbage collection by holding a reference to this resource.
m_resources.append(resource.get());
ResourceClient* resourceClient = new ResourceClient(this);
m_pendingResourceClients.add(resourceClient);
resourceClient->waitForResource(resource.get());
}
}
m_allRequestsStarted = true;
checkDone();
}
void InspectorResourceContentLoader::addListener(PassOwnPtr<VoidCallback> callback)
{
m_callbacks.append(callback);
checkDone();
}
InspectorResourceContentLoader::~InspectorResourceContentLoader()
{
stop();
}
void InspectorResourceContentLoader::stop()
{
HashSet<ResourceClient*> pendingResourceClients;
m_pendingResourceClients.swap(pendingResourceClients);
for (HashSet<ResourceClient*>::const_iterator it = pendingResourceClients.begin(); it != pendingResourceClients.end(); ++it)
(*it)->m_loader = 0;
m_resources.clear();
// Make sure all callbacks are called to prevent infinite waiting time.
checkDone();
}
bool InspectorResourceContentLoader::hasFinished()
{
return m_allRequestsStarted && m_pendingResourceClients.size() == 0;
}
void InspectorResourceContentLoader::checkDone()
{
if (!hasFinished())
return;
Vector<OwnPtr<VoidCallback> > callbacks;
callbacks.swap(m_callbacks);
for (Vector<OwnPtr<VoidCallback> >::const_iterator it = callbacks.begin(); it != callbacks.end(); ++it)
(*it)->handleEvent();
}
void InspectorResourceContentLoader::resourceFinished(ResourceClient* client)
{
m_pendingResourceClients.remove(client);
checkDone();
}
} // namespace WebCore
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