зеркало из https://github.com/mozilla/gecko-dev.git
77 строки
2.3 KiB
C++
77 строки
2.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* 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
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#ifndef nsStyleAutoArray_h_
|
|
#define nsStyleAutoArray_h_
|
|
|
|
#include "nsTArray.h"
|
|
#include "mozilla/Assertions.h"
|
|
|
|
/**
|
|
* An array of objects, similar to AutoTArray<T,1> but which is memmovable. It
|
|
* always has length >= 1.
|
|
*/
|
|
template <typename T>
|
|
class nsStyleAutoArray {
|
|
public:
|
|
// This constructor places a single element in mFirstElement.
|
|
enum WithSingleInitialElement { WITH_SINGLE_INITIAL_ELEMENT };
|
|
explicit nsStyleAutoArray(WithSingleInitialElement) {}
|
|
nsStyleAutoArray(const nsStyleAutoArray& aOther) { *this = aOther; }
|
|
nsStyleAutoArray& operator=(const nsStyleAutoArray& aOther) {
|
|
mFirstElement = aOther.mFirstElement;
|
|
mOtherElements = aOther.mOtherElements;
|
|
return *this;
|
|
}
|
|
|
|
bool operator==(const nsStyleAutoArray& aOther) const {
|
|
return Length() == aOther.Length() &&
|
|
mFirstElement == aOther.mFirstElement &&
|
|
mOtherElements == aOther.mOtherElements;
|
|
}
|
|
bool operator!=(const nsStyleAutoArray& aOther) const {
|
|
return !(*this == aOther);
|
|
}
|
|
|
|
nsStyleAutoArray& operator=(nsStyleAutoArray&& aOther) {
|
|
mFirstElement = aOther.mFirstElement;
|
|
mOtherElements.SwapElements(aOther.mOtherElements);
|
|
|
|
return *this;
|
|
}
|
|
|
|
size_t Length() const { return mOtherElements.Length() + 1; }
|
|
const T& operator[](size_t aIndex) const {
|
|
return aIndex == 0 ? mFirstElement : mOtherElements[aIndex - 1];
|
|
}
|
|
T& operator[](size_t aIndex) {
|
|
return aIndex == 0 ? mFirstElement : mOtherElements[aIndex - 1];
|
|
}
|
|
|
|
void EnsureLengthAtLeast(size_t aMinLen) {
|
|
if (aMinLen > 0) {
|
|
mOtherElements.EnsureLengthAtLeast(aMinLen - 1);
|
|
}
|
|
}
|
|
|
|
void SetLengthNonZero(size_t aNewLen) {
|
|
MOZ_ASSERT(aNewLen > 0);
|
|
mOtherElements.SetLength(aNewLen - 1);
|
|
}
|
|
|
|
void TruncateLengthNonZero(size_t aNewLen) {
|
|
MOZ_ASSERT(aNewLen > 0);
|
|
MOZ_ASSERT(aNewLen <= Length());
|
|
mOtherElements.TruncateLength(aNewLen - 1);
|
|
}
|
|
|
|
private:
|
|
T mFirstElement;
|
|
nsTArray<T> mOtherElements;
|
|
};
|
|
|
|
#endif /* nsStyleAutoArray_h_ */
|