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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 "RuntimeEnabledFeatures.h"
     33 
     34 namespace WebCore {
     35 
     36 ContextFeaturesClient* ContextFeaturesClient::empty()
     37 {
     38     DEFINE_STATIC_LOCAL(ContextFeaturesClient, empty, ());
     39     return ∅
     40 }
     41 
     42 const char* ContextFeatures::supplementName()
     43 {
     44     return "ContextFeatures";
     45 }
     46 
     47 ContextFeatures* ContextFeatures::defaultSwitch()
     48 {
     49     DEFINE_STATIC_LOCAL(RefPtr<ContextFeatures>, instance, (ContextFeatures::create(ContextFeaturesClient::empty())));
     50     return instance.get();
     51 }
     52 
     53 bool ContextFeatures::dialogElementEnabled(Document* document)
     54 {
     55     if (!document)
     56         return RuntimeEnabledFeatures::dialogElementEnabled();
     57     return document->contextFeatures()->isEnabled(document, DialogElement, RuntimeEnabledFeatures::dialogElementEnabled());
     58 }
     59 
     60 bool ContextFeatures::styleScopedEnabled(Document* document)
     61 {
     62     if (!document)
     63         return RuntimeEnabledFeatures::styleScopedEnabled();
     64     return document->contextFeatures()->isEnabled(document, StyleScoped, RuntimeEnabledFeatures::styleScopedEnabled());
     65 }
     66 
     67 bool ContextFeatures::pagePopupEnabled(Document* document)
     68 {
     69     if (!document)
     70         return false;
     71     return document->contextFeatures()->isEnabled(document, PagePopup, false);
     72 }
     73 
     74 bool ContextFeatures::mutationEventsEnabled(Document* document)
     75 {
     76     ASSERT(document);
     77     if (!document)
     78         return true;
     79     return document->contextFeatures()->isEnabled(document, MutationEvents, true);
     80 }
     81 
     82 bool ContextFeatures::pushStateEnabled(Document* document)
     83 {
     84     return document->contextFeatures()->isEnabled(document, PushState, true);
     85 }
     86 
     87 void provideContextFeaturesTo(Page* page, ContextFeaturesClient* client)
     88 {
     89     RefCountedSupplement<Page, ContextFeatures>::provideTo(page, ContextFeatures::supplementName(), ContextFeatures::create(client));
     90 }
     91 
     92 void provideContextFeaturesToDocumentFrom(Document* document, Page* page)
     93 {
     94     ContextFeatures* provided = static_cast<ContextFeatures*>(RefCountedSupplement<Page, ContextFeatures>::from(page, ContextFeatures::supplementName()));
     95     if (!provided)
     96         return;
     97     document->setContextFeatures(provided);
     98 }
     99 
    100 }
    101