dom/file/FileList.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "mozilla/dom/FileList.h"
   8
   9 #include <new>
  10 #include <utility>
  11 #include "ErrorList.h"
  12 #include "js/RootingAPI.h"
  13 #include "mozilla/Assertions.h"
  14 #include "mozilla/ErrorResult.h"
  15 #include "mozilla/MacroForEach.h"
  16 #include "mozilla/RefPtr.h"
  17 #include "mozilla/dom/BindingDeclarations.h"
  18 #include "mozilla/dom/File.h"
  19 #include "mozilla/dom/FileListBinding.h"
  20 #include "mozilla/fallible.h"
  21 #include "nsCycleCollectionParticipant.h"
  22 #include "nsCycleCollectionTraversalCallback.h"
  23 #include "nsISupports.h"
  24 #include "nsTArray.h"
  25 #include "nsWrapperCache.h"
  26
  27 namespace mozilla::dom {
  28
  29 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(FileList, mFiles, mParent)
  30
  31 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(FileList)
  32   NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
  33   NS_INTERFACE_MAP_ENTRY(nsISupports)
  34 NS_INTERFACE_MAP_END
  35
  36 NS_IMPL_CYCLE_COLLECTING_ADDREF(FileList)
  37 NS_IMPL_CYCLE_COLLECTING_RELEASE(FileList)
  38
  39 FileList::FileList(nsISupports* aParent) : mParent(aParent) {}
  40
  41 FileList::~FileList() = default;
  42
  43 JSObject* FileList::WrapObject(JSContext* aCx,
  44                                JS::Handle<JSObject*> aGivenProto) {
  45   return mozilla::dom::FileList_Binding::Wrap(aCx, this, aGivenProto);
  46 }
  47
  48 bool FileList::Append(File* aFile) {
  49   MOZ_ASSERT(aFile);
  50   return mFiles.AppendElement(aFile, fallible);
  51 }
  52
  53 bool FileList::Remove(uint32_t aIndex) {
  54   if (aIndex < mFiles.Length()) {
  55     mFiles.RemoveElementAt(aIndex);
  56     return true;
  57   }
  58
  59   return false;
  60 }
  61
  62 void FileList::Clear() { return mFiles.Clear(); }
  63
  64 File* FileList::Item(uint32_t aIndex) const {
  65   if (aIndex >= mFiles.Length()) {
  66     return nullptr;
  67   }
  68
  69   return mFiles[aIndex];
  70 }
  71
  72 File* FileList::IndexedGetter(uint32_t aIndex, bool& aFound) const {
  73   aFound = aIndex < mFiles.Length();
  74   return Item(aIndex);
  75 }
  76
  77 void FileList::ToSequence(Sequence<RefPtr<File>>& aSequence,
  78                           ErrorResult& aRv) const {
  79   MOZ_ASSERT(aSequence.IsEmpty());
  80   if (mFiles.IsEmpty()) {
  81     return;
  82   }
  83
  84   if (!aSequence.SetLength(mFiles.Length(), mozilla::fallible_t())) {
  85     aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
  86     return;
  87   }
  88
  89   for (uint32_t i = 0; i < mFiles.Length(); ++i) {
  90     aSequence[i] = mFiles[i];
  91   }
  92 }
  93
  94 }  // namespace mozilla::dom