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 "nsStyleUtil.h"
  16 #include "xpcpublic.h"
  17
  18 namespace mozilla::dom {
  19
  20 /* static */
  21 bool CSS::Supports(const GlobalObject&, const nsACString& aProperty,
  22                    const nsACString& aValue) {
  23   return Servo_CSSSupports2(&aProperty, &aValue);
  24 }
  25
  26 /* static */
  27 bool CSS::Supports(const GlobalObject&, const nsACString& aCondition) {
  28   return Servo_CSSSupports(&aCondition, /* ua = */ false, /* chrome = */ false,
  29                            /* quirks = */ false);
  30 }
  31
  32 /* static */
  33 void CSS::Escape(const GlobalObject&, const nsAString& aIdent,
  34                  nsAString& aReturn) {
  35   nsStyleUtil::AppendEscapedCSSIdent(aIdent, aReturn);
  36 }
  37
  38 static Document* GetDocument(const GlobalObject& aGlobal) {
  39   nsCOMPtr<nsPIDOMWindowInner> window =
  40       do_QueryInterface(aGlobal.GetAsSupports());
  41   MOZ_DIAGNOSTIC_ASSERT(window, "CSS is only exposed to window globals");
  42   if (!window) {
  43     return nullptr;
  44   }
  45   return window->GetExtantDoc();
  46 }
  47
  48 /* static */
  49 HighlightRegistry* CSS::GetHighlights(const GlobalObject& aGlobal,
  50                                       ErrorResult& aRv) {
  51   Document* doc = GetDocument(aGlobal);
  52   if (!doc) {
  53     aRv.ThrowUnknownError("No document associated to this global?");
  54     return nullptr;
  55   }
  56   return &doc->HighlightRegistry();
  57 }
  58
  59 /* static */
  60 void CSS::RegisterProperty(const GlobalObject& aGlobal,
  61                            const PropertyDefinition& aDefinition,
  62                            ErrorResult& aRv) {
  63   Document* doc = GetDocument(aGlobal);
  64   if (!doc) {
  65     return aRv.ThrowUnknownError("No document associated to this global?");
  66   }
  67   doc->StyleSetForPresShellOrMediaQueryEvaluation()->RegisterProperty(
  68       aDefinition, aRv);
  69 }
  70
  71 }  // namespace mozilla::dom