FileSystemDirectoryReader.cpp [plain text]
#include "config.h"
#include "FileSystemDirectoryReader.h"
#include "DOMException.h"
#include "DOMFileSystem.h"
#include "ErrorCallback.h"
#include "FileSystemDirectoryEntry.h"
#include "FileSystemEntriesCallback.h"
#include "ScriptExecutionContext.h"
#include <wtf/MainThread.h>
namespace WebCore {
FileSystemDirectoryReader::FileSystemDirectoryReader(ScriptExecutionContext& context, FileSystemDirectoryEntry& directory)
: ActiveDOMObject(&context)
, m_directory(directory)
{
suspendIfNeeded();
}
FileSystemDirectoryReader::~FileSystemDirectoryReader() = default;
const char* FileSystemDirectoryReader::activeDOMObjectName() const
{
return "FileSystemDirectoryReader";
}
bool FileSystemDirectoryReader::canSuspendForDocumentSuspension() const
{
return !hasPendingActivity();
}
void FileSystemDirectoryReader::readEntries(ScriptExecutionContext& context, Ref<FileSystemEntriesCallback>&& successCallback, RefPtr<ErrorCallback>&& errorCallback)
{
if (m_isReading) {
if (errorCallback)
errorCallback->scheduleCallback(context, DOMException::create(Exception { InvalidStateError, "Directory reader is already reading"_s }));
return;
}
if (m_error) {
if (errorCallback)
errorCallback->scheduleCallback(context, DOMException::create(*m_error));
return;
}
if (m_isDone) {
successCallback->scheduleCallback(context, { });
return;
}
m_isReading = true;
auto pendingActivity = makePendingActivity(*this);
callOnMainThread([this, context = makeRef(context), successCallback = WTFMove(successCallback), errorCallback = WTFMove(errorCallback), pendingActivity = WTFMove(pendingActivity)]() mutable {
m_isReading = false;
m_directory->filesystem().listDirectory(context, m_directory, [this, successCallback = WTFMove(successCallback), errorCallback = WTFMove(errorCallback), pendingActivity = WTFMove(pendingActivity)](ExceptionOr<Vector<Ref<FileSystemEntry>>>&& result) {
if (result.hasException()) {
m_error = result.releaseException();
if (errorCallback)
errorCallback->handleEvent(DOMException::create(*m_error));
return;
}
m_isDone = true;
successCallback->handleEvent(result.releaseReturnValue());
});
});
}
}