1 files changed, 281 insertions, 0 deletions
diff --git a/layout/style/CSSStyleSheet.h b/layout/style/CSSStyleSheet.h
new file mode 100644
index 000000000..74e12291e
--- /dev/null
+++ b/layout/style/CSSStyleSheet.h
@@ -0,0 +1,281 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+// vim:cindent:tabstop=2:expandtab:shiftwidth=2:
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* representation of a CSS style sheet */
+
+#ifndef mozilla_CSSStyleSheet_h
+#define mozilla_CSSStyleSheet_h
+
+#include "mozilla/Attributes.h"
+#include "mozilla/IncrementalClearCOMRuleArray.h"
+#include "mozilla/MemoryReporting.h"
+#include "mozilla/StyleSheet.h"
+#include "mozilla/StyleSheetInfo.h"
+#include "mozilla/css/SheetParsingMode.h"
+#include "mozilla/dom/Element.h"
+
+#include "nscore.h"
+#include "nsCOMPtr.h"
+#include "nsAutoPtr.h"
+#include "nsICSSLoaderObserver.h"
+#include "nsTArrayForwardDeclare.h"
+#include "nsString.h"
+#include "mozilla/CORSMode.h"
+#include "nsCycleCollectionParticipant.h"
+#include "mozilla/net/ReferrerPolicy.h"
+#include "mozilla/dom/SRIMetadata.h"
+
+class CSSRuleListImpl;
+class nsCSSRuleProcessor;
+class nsIURI;
+class nsMediaList;
+class nsMediaQueryResultCacheKey;
+class nsStyleSet;
+class nsPresContext;
+class nsXMLNameSpaceMap;
+
+namespace mozilla {
+struct ChildSheetListBuilder;
+class CSSStyleSheet;
+
+namespace css {
+class Rule;
+class GroupRule;
+class ImportRule;
+} // namespace css
+namespace dom {
+class CSSRuleList;
+} // namespace dom
+
+  // -------------------------------
+// CSS Style Sheet Inner Data Container
+//
+
+struct CSSStyleSheetInner : public StyleSheetInfo
+{
+  CSSStyleSheetInner(CSSStyleSheet* aPrimarySheet,
+                     CORSMode aCORSMode,
+                     ReferrerPolicy aReferrerPolicy,
+                     const dom::SRIMetadata& aIntegrity);
+  CSSStyleSheetInner(CSSStyleSheetInner& aCopy,
+                     CSSStyleSheet* aPrimarySheet);
+  ~CSSStyleSheetInner();
+
+  CSSStyleSheetInner* CloneFor(CSSStyleSheet* aPrimarySheet);
+  void AddSheet(CSSStyleSheet* aSheet);
+  void RemoveSheet(CSSStyleSheet* aSheet);
+
+  void RebuildNameSpaces();
+
+  // Create a new namespace map
+  nsresult CreateNamespaceMap();
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
+
+  AutoTArray<CSSStyleSheet*, 8> mSheets;
+  IncrementalClearCOMRuleArray mOrderedRules;
+  nsAutoPtr<nsXMLNameSpaceMap> mNameSpaceMap;
+  // Linked list of child sheets.  This is al fundamentally broken, because
+  // each of the child sheets has a unique parent... We can only hope (and
+  // currently this is the case) that any time page JS can get ts hands on a
+  // child sheet that means we've already ensured unique inners throughout its
+  // parent chain and things are good.
+  RefPtr<CSSStyleSheet> mFirstChild;
+};
+
+
+// -------------------------------
+// CSS Style Sheet
+//
+
+// CID for the CSSStyleSheet class
+// 7985c7ac-9ddc-444d-9899-0c86ec122f54
+#define NS_CSS_STYLE_SHEET_IMPL_CID     \
+{ 0x7985c7ac, 0x9ddc, 0x444d, \
+  { 0x98, 0x99, 0x0c, 0x86, 0xec, 0x12, 0x2f, 0x54 } }
+
+
+class CSSStyleSheet final : public StyleSheet
+                          , public nsICSSLoaderObserver
+{
+public:
+  typedef net::ReferrerPolicy ReferrerPolicy;
+  CSSStyleSheet(css::SheetParsingMode aParsingMode,
+                CORSMode aCORSMode, ReferrerPolicy aReferrerPolicy);
+  CSSStyleSheet(css::SheetParsingMode aParsingMode,
+                CORSMode aCORSMode, ReferrerPolicy aReferrerPolicy,
+                const dom::SRIMetadata& aIntegrity);
+
+  NS_DECL_ISUPPORTS_INHERITED
+  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(CSSStyleSheet, StyleSheet)
+
+  NS_DECLARE_STATIC_IID_ACCESSOR(NS_CSS_STYLE_SHEET_IMPL_CID)
+
+  bool HasRules() const;
+
+  /**
+   * Set the stylesheet to be enabled.  This may or may not make it
+   * applicable.  Note that this WILL inform the sheet's document of
+   * its new applicable state if the state changes but WILL NOT call
+   * BeginUpdate() or EndUpdate() on the document -- calling those is
+   * the caller's responsibility.  This allows use of SetEnabled when
+   * batched updates are desired.  If you want updates handled for
+   * you, see nsIDOMStyleSheet::SetDisabled().
+   */
+  void SetEnabled(bool aEnabled);
+
+  // style sheet owner info
+  CSSStyleSheet* GetParentSheet() const;  // may be null
+  void SetOwningDocument(nsIDocument* aDocument);
+
+  // Find the ID of the owner inner window.
+  uint64_t FindOwningWindowInnerID() const;
+#ifdef DEBUG
+  void List(FILE* out = stdout, int32_t aIndent = 0) const;
+#endif
+
+  void AppendStyleSheet(CSSStyleSheet* aSheet);
+
+  // XXX do these belong here or are they generic?
+  void AppendStyleRule(css::Rule* aRule);
+
+  int32_t StyleRuleCount() const;
+  css::Rule* GetStyleRuleAt(int32_t aIndex) const;
+
+  nsresult DeleteRuleFromGroup(css::GroupRule* aGroup, uint32_t aIndex);
+  nsresult InsertRuleIntoGroup(const nsAString& aRule, css::GroupRule* aGroup, uint32_t aIndex, uint32_t* _retval);
+
+  void SetTitle(const nsAString& aTitle) { mTitle = aTitle; }
+  void SetMedia(nsMediaList* aMedia);
+
+  void SetOwnerRule(css::ImportRule* aOwnerRule) { mOwnerRule = aOwnerRule; /* Not ref counted */ }
+  css::ImportRule* GetOwnerRule() const { return mOwnerRule; }
+  // Workaround overloaded-virtual warning in GCC.
+  using StyleSheet::GetOwnerRule;
+
+  nsXMLNameSpaceMap* GetNameSpaceMap() const { return mInner->mNameSpaceMap; }
+
+  already_AddRefed<CSSStyleSheet> Clone(CSSStyleSheet* aCloneParent,
+                                        css::ImportRule* aCloneOwnerRule,
+                                        nsIDocument* aCloneDocument,
+                                        nsINode* aCloneOwningNode) const;
+
+  bool IsModified() const { return mDirty; }
+
+  void SetModifiedByChildRule() {
+    NS_ASSERTION(mDirty,
+                 "sheet must be marked dirty before handing out child rules");
+    DidDirty();
+  }
+
+  nsresult AddRuleProcessor(nsCSSRuleProcessor* aProcessor);
+  nsresult DropRuleProcessor(nsCSSRuleProcessor* aProcessor);
+
+  void AddStyleSet(nsStyleSet* aStyleSet);
+  void DropStyleSet(nsStyleSet* aStyleSet);
+
+  // nsICSSLoaderObserver interface
+  NS_IMETHOD StyleSheetLoaded(StyleSheet* aSheet, bool aWasAlternate,
+                              nsresult aStatus) override;
+
+  void EnsureUniqueInner();
+
+  // Append all of this sheet's child sheets to aArray.
+  void AppendAllChildSheets(nsTArray<CSSStyleSheet*>& aArray);
+
+  bool UseForPresentation(nsPresContext* aPresContext,
+                            nsMediaQueryResultCacheKey& aKey) const;
+
+  nsresult ReparseSheet(const nsAString& aInput);
+
+  void SetInRuleProcessorCache() { mInRuleProcessorCache = true; }
+
+  // Function used as a callback to rebuild our inner's child sheet
+  // list after we clone a unique inner for ourselves.
+  static bool RebuildChildList(css::Rule* aRule, void* aBuilder);
+
+  size_t SizeOfIncludingThis(MallocSizeOf aMallocSizeOf) const;
+
+  dom::Element* GetScopeElement() const { return mScopeElement; }
+  void SetScopeElement(dom::Element* aScopeElement)
+  {
+    mScopeElement = aScopeElement;
+  }
+
+  // WebIDL StyleSheet API
+  nsMediaList* Media() final;
+
+  // WebIDL CSSStyleSheet API
+  // Can't be inline because we can't include ImportRule here.  And can't be
+  // called GetOwnerRule because that would be ambiguous with the ImportRule
+  // version.
+  nsIDOMCSSRule* GetDOMOwnerRule() const final;
+
+  void WillDirty();
+  void DidDirty();
+
+private:
+  CSSStyleSheet(const CSSStyleSheet& aCopy,
+                CSSStyleSheet* aParentToUse,
+                css::ImportRule* aOwnerRuleToUse,
+                nsIDocument* aDocumentToUse,
+                nsINode* aOwningNodeToUse);
+
+  CSSStyleSheet(const CSSStyleSheet& aCopy) = delete;
+  CSSStyleSheet& operator=(const CSSStyleSheet& aCopy) = delete;
+
+protected:
+  virtual ~CSSStyleSheet();
+
+  void ClearRuleCascades();
+
+  // Add the namespace mapping from this @namespace rule to our namespace map
+  nsresult RegisterNamespaceRule(css::Rule* aRule);
+
+  // Drop our reference to mRuleCollection
+  void DropRuleCollection();
+
+  // Drop our reference to mMedia
+  void DropMedia();
+
+  // Unlink our inner, if needed, for cycle collection
+  void UnlinkInner();
+  // Traverse our inner, if needed, for cycle collection
+  void TraverseInner(nsCycleCollectionTraversalCallback &);
+
+protected:
+  // Internal methods which do not have security check and completeness check.
+  dom::CSSRuleList* GetCssRulesInternal(ErrorResult& aRv);
+  uint32_t InsertRuleInternal(const nsAString& aRule,
+                              uint32_t aIndex, ErrorResult& aRv);
+  void DeleteRuleInternal(uint32_t aIndex, ErrorResult& aRv);
+
+  RefPtr<nsMediaList> mMedia;
+  RefPtr<CSSStyleSheet> mNext;
+  CSSStyleSheet*        mParent;    // weak ref
+  css::ImportRule*      mOwnerRule; // weak ref
+
+  RefPtr<CSSRuleListImpl> mRuleCollection;
+  bool                  mDirty; // has been modified 
+  bool                  mInRuleProcessorCache;
+  RefPtr<dom::Element> mScopeElement;
+
+  CSSStyleSheetInner*   mInner;
+
+  AutoTArray<nsCSSRuleProcessor*, 8>* mRuleProcessors;
+  nsTArray<nsStyleSet*> mStyleSets;
+
+  friend class ::nsMediaList;
+  friend class ::nsCSSRuleProcessor;
+  friend class mozilla::StyleSheet;
+  friend struct mozilla::ChildSheetListBuilder;
+};
+
+NS_DEFINE_STATIC_IID_ACCESSOR(CSSStyleSheet, NS_CSS_STYLE_SHEET_IMPL_CID)
+
+} // namespace mozilla
+
+#endif /* !defined(mozilla_CSSStyleSheet_h) */