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      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 bool ContextFeatures::pushStateEnabled(Document* document)
     68 {
     69     return document->contextFeatures().isEnabled(document, PushState, true);
     70 }
     71 
     72 void provideContextFeaturesTo(Page& page, PassOwnPtr<ContextFeaturesClient> client)
     73 {
     74     ContextFeatures::SupplementType::provideTo(page, ContextFeatures::supplementName(), ContextFeatures::create(client));
     75 }
     76 
     77 void provideContextFeaturesToDocumentFrom(Document& document, Page& page)
     78 {
     79     ContextFeatures* provided = static_cast<ContextFeatures*>(ContextFeatures::SupplementType::from(page, ContextFeatures::supplementName()));
     80     if (!provided)
     81         return;
     82     document.setContextFeatures(*provided);
     83 }
     84 
     85 }
     86