layout/style/CSS.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   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/. */
   6
   7 /* DOM object holding utility CSS functions */
   8
   9 #include "CSS.h"
  10
  11 #include "mozilla/dom/BindingDeclarations.h"
  12 #include "mozilla/dom/HighlightRegistry.h"
  13 #include "mozilla/ServoBindings.h"
  14 #include "mozilla/dom/Document.h"
  15 #include "mozilla/dom/DocumentInlines.h"
  16 #include "nsStyleUtil.h"
  17 #include "xpcpublic.h"
  18
  19 namespace mozilla::dom {
  20
  21 /* static */
  22 bool CSS::Supports(const GlobalObject&, const nsACString& aProperty,
  23                    const nsACString& aValue) {
  24   return Servo_CSSSupports2(&aProperty, &aValue);
  25 }
  26
  27 /* static */
  28 bool CSS::Supports(const GlobalObject&, const nsACString& aCondition) {
  29   return Servo_CSSSupports(&aCondition, /* ua = */ false, /* chrome = */ false,
  30                            /* quirks = */ false);
  31 }
  32
  33 /* static */
  34 void CSS::Escape(const GlobalObject&, const nsAString& aIdent,
  35                  nsAString& aReturn) {
  36   nsStyleUtil::AppendEscapedCSSIdent(aIdent, aReturn);
  37 }
  38
  39 static Document* GetDocument(const GlobalObject& aGlobal) {
  40   nsCOMPtr<nsPIDOMWindowInner> window =
  41       do_QueryInterface(aGlobal.GetAsSupports());
  42   MOZ_DIAGNOSTIC_ASSERT(window, "CSS is only exposed to window globals");
  43   if (!window) {
  44     return nullptr;
  45   }
  46   return window->GetExtantDoc();
  47 }
  48
  49 /* static */
  50 HighlightRegistry* CSS::GetHighlights(const GlobalObject& aGlobal,
  51                                       ErrorResult& aRv) {
  52   Document* doc = GetDocument(aGlobal);
  53   if (!doc) {
  54     aRv.ThrowUnknownError("No document associated to this global?");
  55     return nullptr;
  56   }
  57   return &doc->HighlightRegistry();
  58 }
  59
  60 /* static */
  61 void CSS::RegisterProperty(const GlobalObject& aGlobal,
  62                            const PropertyDefinition& aDefinition,
  63                            ErrorResult& aRv) {
  64   Document* doc = GetDocument(aGlobal);
  65   if (!doc) {
  66     return aRv.ThrowUnknownError("No document associated to this global?");
  67   }
  68   doc->EnsureStyleSet().RegisterProperty(aDefinition, aRv);
  69 }
  70
  71 }  // namespace mozilla::dom