third_party/WebKit/Source/core/dom/ContextFeatures.cpp

   1 /*
   2  * Copyright (C) 2012 Google Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  *     * Redistributions of source code must retain the above copyright
   9  * notice, this list of conditions and the following disclaimer.
  10  *     * Neither the name of Google Inc. nor the names of its
  11  * contributors may be used to endorse or promote products derived from
  12  * this software without specific prior written permission.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  15  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  16  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  17  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  18  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  19  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  20  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "config.h"
  28 #include "core/dom/ContextFeatures.h"
  29
  30 #include "core/dom/Document.h"
  31 #include "core/page/Page.h"
  32 #include "platform/RuntimeEnabledFeatures.h"
  33
  34 namespace blink {
  35
  36 PassOwnPtr<ContextFeaturesClient> ContextFeaturesClient::empty()
  37 {
  38     return adoptPtr(new ContextFeaturesClient());
  39 }
  40
  41 const char* ContextFeatures::supplementName()
  42 {
  43     return "ContextFeatures";
  44 }
  45
  46 ContextFeatures* ContextFeatures::defaultSwitch()
  47 {
  48     DEFINE_STATIC_REF_WILL_BE_PERSISTENT(ContextFeatures, instance, (ContextFeatures::create(ContextFeaturesClient::empty())));
  49     return instance;
  50 }
  51
  52 bool ContextFeatures::pagePopupEnabled(Document* document)
  53 {
  54     if (!document)
  55         return false;
  56     return document->contextFeatures().isEnabled(document, PagePopup, false);
  57 }
  58
  59 bool ContextFeatures::mutationEventsEnabled(Document* document)
  60 {
  61     ASSERT(document);
  62     if (!document)
  63         return true;
  64     return document->contextFeatures().isEnabled(document, MutationEvents, true);
  65 }
  66
  67 void provideContextFeaturesTo(Page& page, PassOwnPtr<ContextFeaturesClient> client)
  68 {
  69     ContextFeatures::SupplementType::provideTo(page, ContextFeatures::supplementName(), ContextFeatures::create(client));
  70 }
  71
  72 void provideContextFeaturesToDocumentFrom(Document& document, Page& page)
  73 {
  74     ContextFeatures* provided = static_cast<ContextFeatures*>(ContextFeatures::SupplementType::from(page, ContextFeatures::supplementName()));
  75     if (!provided)
  76         return;
  77     document.setContextFeatures(*provided);
  78 }
  79
  80 } // namespace blink