tor-browser

The Tor Browser
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CustomStateSet.cpp (3073B)

      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 file,
      5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #include "CustomStateSet.h"
      8 
      9 #include "mozilla/PresShell.h"
     10 #include "mozilla/dom/Document.h"
     11 #include "mozilla/dom/ElementInternalsBinding.h"
     12 #include "mozilla/dom/HTMLElement.h"
     13 
     14 namespace mozilla::dom {
     15 
     16 NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(CustomStateSet, mTarget);
     17 
     18 NS_IMPL_CYCLE_COLLECTING_ADDREF(CustomStateSet)
     19 NS_IMPL_CYCLE_COLLECTING_RELEASE(CustomStateSet)
     20 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(CustomStateSet)
     21  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
     22 NS_INTERFACE_MAP_END
     23 
     24 CustomStateSet::CustomStateSet(HTMLElement* aTarget) : mTarget(aTarget) {}
     25 
     26 // WebIDL interface
     27 nsISupports* CustomStateSet::GetParentObject() const {
     28  return ToSupports(mTarget);
     29 }
     30 
     31 JSObject* CustomStateSet::WrapObject(JSContext* aCx,
     32                                     JS::Handle<JSObject*> aGivenProto) {
     33  return CustomStateSet_Binding::Wrap(aCx, this, aGivenProto);
     34 }
     35 
     36 void CustomStateSet::Clear(ErrorResult& aRv) {
     37  CustomStateSet_Binding::SetlikeHelpers::Clear(this, aRv);
     38  if (aRv.Failed()) {
     39    return;
     40  }
     41 
     42  nsTArray<RefPtr<nsAtom>>& states = mTarget->EnsureCustomStates();
     43  Document* doc = mTarget->GetComposedDoc();
     44  PresShell* presShell = doc ? doc->GetPresShell() : nullptr;
     45  if (presShell) {
     46    presShell->CustomStatesWillChange(*mTarget);
     47    // Iterate over each state to ensure each one is invalidated.
     48    while (!states.IsEmpty()) {
     49      RefPtr<nsAtom> atom = states.PopLastElement();
     50      presShell->CustomStateChanged(*mTarget, atom);
     51    }
     52    return;
     53  }
     54 
     55  states.Clear();
     56 }
     57 
     58 bool CustomStateSet::Delete(const nsAString& aState, ErrorResult& aRv) {
     59  CustomStateSet_Binding::SetlikeHelpers::Delete(this, aState, aRv);
     60  if (aRv.Failed()) {
     61    return false;
     62  }
     63 
     64  RefPtr<nsAtom> atom = NS_AtomizeMainThread(aState);
     65  Document* doc = mTarget->GetComposedDoc();
     66  PresShell* presShell = doc ? doc->GetPresShell() : nullptr;
     67  if (presShell) {
     68    presShell->CustomStatesWillChange(*mTarget);
     69  }
     70 
     71  bool deleted = mTarget->EnsureCustomStates().RemoveElement(atom);
     72 
     73  if (presShell) {
     74    presShell->CustomStateChanged(*mTarget, atom);
     75  }
     76  return deleted;
     77 }
     78 
     79 void CustomStateSet::Add(const nsAString& aState, ErrorResult& aRv) {
     80  CustomStateSet_Binding::SetlikeHelpers::Add(this, aState, aRv);
     81  if (aRv.Failed()) {
     82    return;
     83  }
     84 
     85  nsTArray<RefPtr<nsAtom>>& states = mTarget->EnsureCustomStates();
     86  RefPtr<nsAtom> atom = NS_AtomizeMainThread(aState);
     87  if (states.Contains(atom)) {
     88    return;
     89  }
     90 
     91  Document* doc = mTarget->GetComposedDoc();
     92  PresShell* presShell = doc ? doc->GetPresShell() : nullptr;
     93  if (presShell) {
     94    presShell->CustomStatesWillChange(*mTarget);
     95  }
     96 
     97  states.AppendElement(atom);
     98 
     99  if (presShell) {
    100    presShell->CustomStateChanged(*mTarget, atom);
    101  }
    102 }
    103 
    104 }  // namespace mozilla::dom