LCOV - code coverage report
Current view: top level - layout/style - nsStyleAutoArray.h (source / functions) Hit Total Coverage
Test: output.info Lines: 32 36 88.9 %
Date: 2017-07-14 16:53:18 Functions: 29 32 90.6 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* This Source Code Form is subject to the terms of the Mozilla Public
       3             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       4             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       5             : 
       6             : #ifndef nsStyleAutoArray_h_
       7             : #define nsStyleAutoArray_h_
       8             : 
       9             : #include "nsTArray.h"
      10             : #include "mozilla/Assertions.h"
      11             : 
      12             : /**
      13             :  * An array of objects, similar to AutoTArray<T,1> but which is memmovable. It
      14             :  * always has length >= 1.
      15             :  */
      16             : template<typename T>
      17         929 : class nsStyleAutoArray
      18             : {
      19             : public:
      20             :   // This constructor places a single element in mFirstElement.
      21             :   enum WithSingleInitialElement { WITH_SINGLE_INITIAL_ELEMENT };
      22         389 :   explicit nsStyleAutoArray(WithSingleInitialElement) {}
      23        1431 :   nsStyleAutoArray(const nsStyleAutoArray& aOther) { *this = aOther; }
      24        1431 :   nsStyleAutoArray& operator=(const nsStyleAutoArray& aOther) {
      25        1431 :     mFirstElement = aOther.mFirstElement;
      26        1431 :     mOtherElements = aOther.mOtherElements;
      27        1431 :     return *this;
      28             :   }
      29             : 
      30         688 :   bool operator==(const nsStyleAutoArray& aOther) const {
      31        1376 :     return Length() == aOther.Length() &&
      32        1372 :            mFirstElement == aOther.mFirstElement &&
      33        1372 :            mOtherElements == aOther.mOtherElements;
      34             :   }
      35         688 :   bool operator!=(const nsStyleAutoArray& aOther) const {
      36         688 :     return !(*this == aOther);
      37             :   }
      38             : 
      39           0 :   nsStyleAutoArray& operator=(nsStyleAutoArray&& aOther) {
      40           0 :     mFirstElement = aOther.mFirstElement;
      41           0 :     mOtherElements.SwapElements(aOther.mOtherElements);
      42             : 
      43           0 :     return *this;
      44             :   }
      45             : 
      46        2071 :   size_t Length() const {
      47        2071 :     return mOtherElements.Length() + 1;
      48             :   }
      49       23056 :   const T& operator[](size_t aIndex) const {
      50       23056 :     return aIndex == 0 ? mFirstElement : mOtherElements[aIndex - 1];
      51             :   }
      52        2238 :   T& operator[](size_t aIndex) {
      53        2238 :     return aIndex == 0 ? mFirstElement : mOtherElements[aIndex - 1];
      54             :   }
      55             : 
      56         164 :   void EnsureLengthAtLeast(size_t aMinLen) {
      57         164 :     if (aMinLen > 0) {
      58         164 :       mOtherElements.EnsureLengthAtLeast(aMinLen - 1);
      59             :     }
      60         164 :   }
      61             : 
      62        1342 :   void SetLengthNonZero(size_t aNewLen) {
      63        1342 :     MOZ_ASSERT(aNewLen > 0);
      64        1342 :     mOtherElements.SetLength(aNewLen - 1);
      65        1342 :   }
      66             : 
      67          45 :   void TruncateLengthNonZero(size_t aNewLen) {
      68          45 :     MOZ_ASSERT(aNewLen > 0);
      69          45 :     MOZ_ASSERT(aNewLen <= Length());
      70          45 :     mOtherElements.TruncateLength(aNewLen - 1);
      71          45 :   }
      72             : 
      73             : private:
      74             :   T mFirstElement;
      75             :   nsTArray<T> mOtherElements;
      76             : };
      77             : 
      78             : #endif /* nsStyleAutoArray_h_ */

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