The Tor Browser: content/base/src/nsTraversal.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-

     2  *

     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/. */

     7 #include "nsTraversal.h"

     9 #include "nsIDOMNode.h"

    10 #include "nsError.h"

    11 #include "nsINode.h"

    12 #include "mozilla/AutoRestore.h"

    14 #include "nsGkAtoms.h"

    16 using namespace mozilla;

    17 using namespace mozilla::dom;

    19 nsTraversal::nsTraversal(nsINode *aRoot,

    20                          uint32_t aWhatToShow,

    21                          const NodeFilterHolder &aFilter) :

    22     mRoot(aRoot),

    23     mWhatToShow(aWhatToShow),

    24     mFilter(aFilter),

    25     mInAcceptNode(false)

    26 {

    27     NS_ASSERTION(aRoot, "invalid root in call to nsTraversal constructor");

    28 }

    30 nsTraversal::~nsTraversal()

    31 {

    32     /* destructor code */

    33 }

    35 /*

    36  * Tests if and how a node should be filtered. Uses mWhatToShow and

    37  * mFilter to test the node.

    38  * @param aNode     Node to test

    39  * @param aResult   Whether we succeeded

    40  * @returns         Filtervalue. See nsIDOMNodeFilter.idl

    41  */

    42 int16_t

    43 nsTraversal::TestNode(nsINode* aNode, mozilla::ErrorResult& aResult)

    44 {

    45     if (mInAcceptNode) {

    46         aResult.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);

    47         return 0;

    48     }

    50     uint16_t nodeType = aNode->NodeType();

    52     if (nodeType <= 12 && !((1 << (nodeType-1)) & mWhatToShow)) {

    53         return nsIDOMNodeFilter::FILTER_SKIP;

    54     }

    56     if (!mFilter.GetISupports()) {

    57         // No filter, just accept

    58         return nsIDOMNodeFilter::FILTER_ACCEPT;

    59     }

    61     if (mFilter.HasWebIDLCallback()) {

    62         AutoRestore<bool> inAcceptNode(mInAcceptNode);

    63         mInAcceptNode = true;

    64         return mFilter.GetWebIDLCallback()->

    65             AcceptNode(*aNode, aResult, CallbackObject::eRethrowExceptions);

    66     }

    68     nsCOMPtr<nsIDOMNode> domNode = do_QueryInterface(aNode);

    69     AutoRestore<bool> inAcceptNode(mInAcceptNode);

    70     mInAcceptNode = true;

    71     int16_t filtered;

    72     nsresult rv = mFilter.GetXPCOMCallback()->AcceptNode(domNode, &filtered);

    73     if (NS_FAILED(rv)) {

    74         aResult.Throw(rv);

    75     }

    76     return filtered;

    77 }

The Tor Browser / file revision