DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Mercurial (dcc6d7a0dc00)

VCS Links

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192
/* -*- 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 nsXBLChildrenElement_h___
#define nsXBLChildrenElement_h___

#include "nsIDOMElement.h"
#include "nsINodeList.h"
#include "nsBindingManager.h"
#include "mozilla/dom/nsXMLElement.h"

class nsAnonymousContentList;

namespace mozilla {
namespace dom {

class XBLChildrenElement : public nsXMLElement
{
public:
  explicit XBLChildrenElement(already_AddRefed<mozilla::dom::NodeInfo>& aNodeInfo)
    : nsXMLElement(aNodeInfo)
  {
  }
  explicit XBLChildrenElement(already_AddRefed<mozilla::dom::NodeInfo>&& aNodeInfo)
    : nsXMLElement(aNodeInfo)
  {
  }

  // nsISupports
  NS_DECL_ISUPPORTS_INHERITED

  // nsINode interface methods
  virtual nsresult Clone(mozilla::dom::NodeInfo* aNodeInfo, nsINode** aResult) const override;

  virtual nsIDOMNode* AsDOMNode() override { return this; }

  // nsIContent interface methods
  virtual nsresult UnsetAttr(int32_t aNameSpaceID, nsIAtom* aAttribute,
                             bool aNotify) override;
  virtual bool ParseAttribute(int32_t aNamespaceID,
                              nsIAtom* aAttribute,
                              const nsAString& aValue,
                              nsAttrValue& aResult) override;

  void AppendInsertedChild(nsIContent* aChild)
  {
    mInsertedChildren.AppendElement(aChild);
    aChild->SetXBLInsertionParent(GetParent());

    // Appending an inserted child causes the inserted
    // children to be projected instead of default content.
    MaybeRemoveDefaultContent();
  }

  void InsertInsertedChildAt(nsIContent* aChild, uint32_t aIndex)
  {
    mInsertedChildren.InsertElementAt(aIndex, aChild);
    aChild->SetXBLInsertionParent(GetParent());

    // Inserting an inserted child causes the inserted
    // children to be projected instead of default content.
    MaybeRemoveDefaultContent();
  }

  void RemoveInsertedChild(nsIContent* aChild)
  {
    // Can't use this assertion as we cheat for dynamic insertions and
    // only insert in the innermost insertion point.
    //NS_ASSERTION(mInsertedChildren.Contains(aChild),
    //             "Removing child that's not there");
    mInsertedChildren.RemoveElement(aChild);

    // After removing the inserted child, default content
    // may be projected into this insertion point.
    MaybeSetupDefaultContent();
  }

  void ClearInsertedChildren()
  {
    for (uint32_t c = 0; c < mInsertedChildren.Length(); ++c) {
      mInsertedChildren[c]->SetXBLInsertionParent(nullptr);
    }
    mInsertedChildren.Clear();

    // After clearing inserted children, default content
    // will be projected into this insertion point.
    MaybeSetupDefaultContent();
  }

  void MaybeSetupDefaultContent()
  {
    if (!HasInsertedChildren()) {
      for (nsIContent* child = static_cast<nsINode*>(this)->GetFirstChild();
           child;
           child = child->GetNextSibling()) {
        child->SetXBLInsertionParent(GetParent());
      }
    }
  }

  void MaybeRemoveDefaultContent()
  {
    if (!HasInsertedChildren()) {
      for (nsIContent* child = static_cast<nsINode*>(this)->GetFirstChild();
           child;
           child = child->GetNextSibling()) {
        child->SetXBLInsertionParent(nullptr);
      }
    }
  }

  uint32_t InsertedChildrenLength()
  {
    return mInsertedChildren.Length();
  }

  bool HasInsertedChildren()
  {
    return !mInsertedChildren.IsEmpty();
  }

  int32_t IndexOfInsertedChild(nsIContent* aChild)
  {
    return mInsertedChildren.IndexOf(aChild);
  }

  bool Includes(nsIContent* aChild)
  {
    NS_ASSERTION(!mIncludes.IsEmpty(),
                 "Shouldn't check for includes on default insertion point");
    return mIncludes.Contains(aChild->NodeInfo()->NameAtom());
  }

  bool IsDefaultInsertion()
  {
    return mIncludes.IsEmpty();
  }

  nsIContent* InsertedChild(uint32_t aIndex)
  {
    return mInsertedChildren[aIndex];
  }

protected:
  ~XBLChildrenElement();

private:
  nsTArray<nsIContent*> mInsertedChildren; // WEAK
  nsTArray<nsCOMPtr<nsIAtom> > mIncludes;
};

} // namespace dom
} // namespace mozilla

class nsAnonymousContentList : public nsINodeList
{
public:
  explicit nsAnonymousContentList(nsIContent* aParent)
    : mParent(aParent)
  {
    MOZ_COUNT_CTOR(nsAnonymousContentList);
  }

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS(nsAnonymousContentList)
  // nsIDOMNodeList interface
  NS_DECL_NSIDOMNODELIST

  // nsINodeList interface
  virtual int32_t IndexOf(nsIContent* aContent) override;
  virtual nsINode* GetParentObject() override { return mParent; }
  virtual nsIContent* Item(uint32_t aIndex) override;

  virtual JSObject* WrapObject(JSContext *cx, JS::Handle<JSObject*> aGivenProto) override;

  bool IsListFor(nsIContent* aContent) {
    return mParent == aContent;
  }

private:
  virtual ~nsAnonymousContentList()
  {
    MOZ_COUNT_DTOR(nsAnonymousContentList);
  }

  nsCOMPtr<nsIContent> mParent;
};

#endif // nsXBLChildrenElement_h___