Add m-esr52 at 52.6.0

1 files changed, 175 insertions, 0 deletions

diff --git a/layout/style/ServoStyleSet.h b/layout/style/ServoStyleSet.h
new file mode 100644
index 000000000..26b515afd
--- /dev/null
+++ b/layout/style/ServoStyleSet.h
@@ -0,0 +1,175 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef mozilla_ServoStyleSet_h
+#define mozilla_ServoStyleSet_h
+
+#include "mozilla/EnumeratedArray.h"
+#include "mozilla/EventStates.h"
+#include "mozilla/ServoBindingTypes.h"
+#include "mozilla/ServoElementSnapshot.h"
+#include "mozilla/StyleSheetInlines.h"
+#include "mozilla/SheetType.h"
+#include "mozilla/UniquePtr.h"
+#include "nsCSSPseudoElements.h"
+#include "nsChangeHint.h"
+#include "nsIAtom.h"
+#include "nsTArray.h"
+
+namespace mozilla {
+namespace dom {
+class Element;
+} // namespace dom
+class CSSStyleSheet;
+class ServoRestyleManager;
+class ServoStyleSheet;
+} // namespace mozilla
+class nsIDocument;
+class nsStyleContext;
+class nsPresContext;
+struct TreeMatchContext;
+
+namespace mozilla {
+
+/**
+ * The set of style sheets that apply to a document, backed by a Servo
+ * Stylist.  A ServoStyleSet contains ServoStyleSheets.
+ */
+class ServoStyleSet
+{
+  friend class ServoRestyleManager;
+public:
+  ServoStyleSet();
+
+  void Init(nsPresContext* aPresContext);
+  void BeginShutdown();
+  void Shutdown();
+
+  bool GetAuthorStyleDisabled() const;
+  nsresult SetAuthorStyleDisabled(bool aStyleDisabled);
+
+  void BeginUpdate();
+  nsresult EndUpdate();
+
+  already_AddRefed<nsStyleContext>
+  ResolveStyleFor(dom::Element* aElement,
+                  nsStyleContext* aParentContext);
+
+  already_AddRefed<nsStyleContext>
+  ResolveStyleFor(dom::Element* aElement,
+                  nsStyleContext* aParentContext,
+                  TreeMatchContext& aTreeMatchContext);
+
+  already_AddRefed<nsStyleContext>
+  ResolveStyleForText(nsIContent* aTextNode,
+                      nsStyleContext* aParentContext);
+
+  already_AddRefed<nsStyleContext>
+  ResolveStyleForOtherNonElement(nsStyleContext* aParentContext);
+
+  already_AddRefed<nsStyleContext>
+  ResolvePseudoElementStyle(dom::Element* aParentElement,
+                            mozilla::CSSPseudoElementType aType,
+                            nsStyleContext* aParentContext,
+                            dom::Element* aPseudoElement);
+
+  // aFlags is an nsStyleSet flags bitfield
+  already_AddRefed<nsStyleContext>
+  ResolveAnonymousBoxStyle(nsIAtom* aPseudoTag, nsStyleContext* aParentContext,
+                           uint32_t aFlags = 0);
+
+  // manage the set of style sheets in the style set
+  nsresult AppendStyleSheet(SheetType aType, ServoStyleSheet* aSheet);
+  nsresult PrependStyleSheet(SheetType aType, ServoStyleSheet* aSheet);
+  nsresult RemoveStyleSheet(SheetType aType, ServoStyleSheet* aSheet);
+  nsresult ReplaceSheets(SheetType aType,
+                         const nsTArray<RefPtr<ServoStyleSheet>>& aNewSheets);
+  nsresult InsertStyleSheetBefore(SheetType aType,
+                                  ServoStyleSheet* aNewSheet,
+                                  ServoStyleSheet* aReferenceSheet);
+
+  int32_t SheetCount(SheetType aType) const;
+  ServoStyleSheet* StyleSheetAt(SheetType aType, int32_t aIndex) const;
+
+  nsresult RemoveDocStyleSheet(ServoStyleSheet* aSheet);
+  nsresult AddDocStyleSheet(ServoStyleSheet* aSheet, nsIDocument* aDocument);
+
+  // check whether there is ::before/::after style for an element
+  already_AddRefed<nsStyleContext>
+  ProbePseudoElementStyle(dom::Element* aParentElement,
+                          mozilla::CSSPseudoElementType aType,
+                          nsStyleContext* aParentContext);
+
+  already_AddRefed<nsStyleContext>
+  ProbePseudoElementStyle(dom::Element* aParentElement,
+                          mozilla::CSSPseudoElementType aType,
+                          nsStyleContext* aParentContext,
+                          TreeMatchContext& aTreeMatchContext,
+                          dom::Element* aPseudoElement = nullptr);
+
+  // Test if style is dependent on content state
+  nsRestyleHint HasStateDependentStyle(dom::Element* aElement,
+                                       EventStates aStateMask);
+  nsRestyleHint HasStateDependentStyle(
+    dom::Element* aElement, mozilla::CSSPseudoElementType aPseudoType,
+    dom::Element* aPseudoElement, EventStates aStateMask);
+
+  /**
+   * Computes a restyle hint given a element and a previous element snapshot.
+   */
+  nsRestyleHint ComputeRestyleHint(dom::Element* aElement,
+                                   ServoElementSnapshot* aSnapshot);
+
+  /**
+   * Performs a Servo traversal to compute style for all dirty nodes in the
+   * document. The root element must be non-null.
+   *
+   * If aLeaveDirtyBits is true, the dirty/dirty-descendant bits are not
+   * cleared.
+   */
+  void StyleDocument(bool aLeaveDirtyBits);
+
+  /**
+   * Eagerly styles a subtree of dirty nodes that were just appended to the
+   * tree. This is used in situations where we need the style immediately and
+   * cannot wait for a future batch restyle.
+   *
+   * The subtree must have the root dirty bit set, which currently gets
+   * propagated to all descendants. The dirty bits are cleared before
+   * returning.
+   */
+  void StyleNewSubtree(nsIContent* aContent);
+
+  /**
+   * Like the above, but does not assume that the root node is dirty. When
+   * appending multiple children to a potentially-non-dirty node, it's
+   * preferable to call StyleNewChildren on the node rather than making multiple
+   * calls to StyleNewSubtree on each child, since it allows for more
+   * parallelism.
+   */
+  void StyleNewChildren(nsIContent* aParent);
+
+private:
+  already_AddRefed<nsStyleContext> GetContext(already_AddRefed<ServoComputedValues>,
+                                              nsStyleContext* aParentContext,
+                                              nsIAtom* aPseudoTag,
+                                              CSSPseudoElementType aPseudoType);
+
+  already_AddRefed<nsStyleContext> GetContext(nsIContent* aContent,
+                                              nsStyleContext* aParentContext,
+                                              nsIAtom* aPseudoTag,
+                                              CSSPseudoElementType aPseudoType);
+
+  nsPresContext* mPresContext;
+  UniquePtr<RawServoStyleSet> mRawSet;
+  EnumeratedArray<SheetType, SheetType::Count,
+                  nsTArray<RefPtr<ServoStyleSheet>>> mSheets;
+  int32_t mBatching;
+};
+
+} // namespace mozilla
+
+#endif // mozilla_ServoStyleSet_h