The Tor Browser: content/xul/templates/src/nsContentSupportMap.h@129ffea94266

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

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

     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/. */

     6 #ifndef nsContentSupportMap_h__

     7 #define nsContentSupportMap_h__

     9 #include "pldhash.h"

    10 #include "nsTemplateMatch.h"

    12 /**

    13  * The nsContentSupportMap maintains a mapping from a "resource element"

    14  * in the content tree to the nsTemplateMatch that was used to instantiate it. This

    15  * is necessary to allow the XUL content to be built lazily. Specifically,

    16  * when building "resumes" on a partially-built content element, the builder

    17  * will walk upwards in the content tree to find the first element with an

    18  * 'id' attribute. This element is assumed to be the "resource element",

    19  * and allows the content builder to access the nsTemplateMatch (variable assignments

    20  * and rule information).

    21  */

    22 class nsContentSupportMap {

    23 public:

    24     nsContentSupportMap() { Init(); }

    25     ~nsContentSupportMap() { Finish(); }

    27     nsresult Put(nsIContent* aElement, nsTemplateMatch* aMatch) {

    28         if (!mMap.ops)

    29             return NS_ERROR_NOT_INITIALIZED;

    31         PLDHashEntryHdr* hdr = PL_DHashTableOperate(&mMap, aElement, PL_DHASH_ADD);

    32         if (!hdr)

    33             return NS_ERROR_OUT_OF_MEMORY;

    35         Entry* entry = reinterpret_cast<Entry*>(hdr);

    36         NS_ASSERTION(entry->mMatch == nullptr, "over-writing entry");

    37         entry->mContent = aElement;

    38         entry->mMatch   = aMatch;

    39         return NS_OK; }

    41     bool Get(nsIContent* aElement, nsTemplateMatch** aMatch) {

    42         if (!mMap.ops)

    43             return false;

    45         PLDHashEntryHdr* hdr = PL_DHashTableOperate(&mMap, aElement, PL_DHASH_LOOKUP);

    46         if (PL_DHASH_ENTRY_IS_FREE(hdr))

    47             return false;

    49         Entry* entry = reinterpret_cast<Entry*>(hdr);

    50         *aMatch = entry->mMatch;

    51         return true; }

    53     nsresult Remove(nsIContent* aElement);

    55     void Clear() { Finish(); Init(); }

    57 protected:

    58     PLDHashTable mMap;

    60     void Init();

    61     void Finish();

    63     struct Entry {

    64         PLDHashEntryHdr  mHdr;

    65         nsIContent*      mContent;

    66         nsTemplateMatch* mMatch;

    67     };

    68 };

    70 #endif

The Tor Browser / file revision

content/xul/templates/src/nsContentSupportMap.h@129ffea94266

content/xul/templates/src/nsContentSupportMap.h