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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#ifndef TRANSFRMX_XPATHRESULTCOMPARATOR_H
#define TRANSFRMX_XPATHRESULTCOMPARATOR_H
#include "mozilla/Attributes.h"
#include "mozilla/Maybe.h"
#include "mozilla/intl/Collator.h"
#include "mozilla/UniquePtr.h"
#include "txCore.h"
#include "nsCOMPtr.h"
#include "nsString.h"
class Expr;
class txIEvalContext;
/*
* Result comparators
*/
class txXPathResultComparator {
public:
virtual ~txXPathResultComparator() = default;
/*
* Compares two XPath results. Returns -1 if val1 < val2,
* 1 if val1 > val2 and 0 if val1 == val2.
*/
virtual int compareValues(txObject* val1, txObject* val2) = 0;
/*
* Create a sortable value.
*/
virtual nsresult createSortableValue(Expr* aExpr, txIEvalContext* aContext,
txObject*& aResult) = 0;
};
/*
* Compare results as strings (data-type="text")
*/
class txResultStringComparator : public txXPathResultComparator {
public:
txResultStringComparator(bool aAscending, bool aUpperFirst,
const nsString& aLanguage);
int compareValues(txObject* aVal1, txObject* aVal2) override;
nsresult createSortableValue(Expr* aExpr, txIEvalContext* aContext,
txObject*& aResult) override;
private:
mozilla::UniquePtr<const mozilla::intl::Collator> mCollator;
nsresult init(const nsString& aLanguage);
int mSorting;
class StringValue : public txObject {
public:
StringValue();
~StringValue();
mozilla::UniquePtr<nsString> mString;
};
};
/*
* Compare results as numbers (data-type="number")
*/
class txResultNumberComparator : public txXPathResultComparator {
public:
explicit txResultNumberComparator(bool aAscending);
int compareValues(txObject* aVal1, txObject* aVal2) override;
nsresult createSortableValue(Expr* aExpr, txIEvalContext* aContext,
txObject*& aResult) override;
private:
int mAscending;
class NumberValue : public txObject {
public:
double mVal;
};
};
#endif