Add m-esr52 at 52.6.0

1 files changed, 198 insertions, 0 deletions

diff --git a/accessible/ipc/DocAccessibleParent.h b/accessible/ipc/DocAccessibleParent.h
new file mode 100644
index 0000000000..3686e8a2f2
--- /dev/null
+++ b/accessible/ipc/DocAccessibleParent.h
@@ -0,0 +1,198 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=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_a11y_DocAccessibleParent_h
+#define mozilla_a11y_DocAccessibleParent_h
+
+#include "nsAccessibilityService.h"
+#include "mozilla/a11y/PDocAccessibleParent.h"
+#include "mozilla/a11y/ProxyAccessible.h"
+#include "nsClassHashtable.h"
+#include "nsHashKeys.h"
+#include "nsISupportsImpl.h"
+
+namespace mozilla {
+namespace a11y {
+
+class xpcAccessibleGeneric;
+
+/*
+ * These objects live in the main process and comunicate with and represent
+ * an accessible document in a content process.
+ */
+class DocAccessibleParent : public ProxyAccessible,
+    public PDocAccessibleParent
+{
+public:
+  DocAccessibleParent() :
+    ProxyAccessible(this), mParentDoc(nullptr),
+    mTopLevel(false), mShutdown(false)
+  { MOZ_COUNT_CTOR_INHERITED(DocAccessibleParent, ProxyAccessible); }
+  ~DocAccessibleParent()
+  {
+    MOZ_COUNT_DTOR_INHERITED(DocAccessibleParent, ProxyAccessible);
+    MOZ_ASSERT(mChildDocs.Length() == 0);
+    MOZ_ASSERT(!ParentDoc());
+  }
+
+  void SetTopLevel() { mTopLevel = true; }
+  bool IsTopLevel() const { return mTopLevel; }
+
+  bool IsShutdown() const { return mShutdown; }
+
+  /*
+   * Called when a message from a document in a child process notifies the main
+   * process it is firing an event.
+   */
+  virtual bool RecvEvent(const uint64_t& aID, const uint32_t& aType)
+    override;
+
+  virtual bool RecvShowEvent(const ShowEventData& aData, const bool& aFromUser)
+    override;
+  virtual bool RecvHideEvent(const uint64_t& aRootID, const bool& aFromUser)
+    override;
+  virtual bool RecvStateChangeEvent(const uint64_t& aID,
+                                    const uint64_t& aState,
+                                    const bool& aEnabled) override final;
+
+  virtual bool RecvCaretMoveEvent(const uint64_t& aID, const int32_t& aOffset)
+    override final;
+
+  virtual bool RecvTextChangeEvent(const uint64_t& aID, const nsString& aStr,
+                                   const int32_t& aStart, const uint32_t& aLen,
+                                   const bool& aIsInsert,
+                                   const bool& aFromUser) override;
+
+  virtual bool RecvSelectionEvent(const uint64_t& aID,
+                                  const uint64_t& aWidgetID,
+                                  const uint32_t& aType) override;
+
+  virtual bool RecvRoleChangedEvent(const uint32_t& aRole) override final;
+
+  virtual bool RecvBindChildDoc(PDocAccessibleParent* aChildDoc, const uint64_t& aID) override;
+
+  void Unbind()
+  {
+    if (DocAccessibleParent* parent = ParentDoc()) {
+      parent->RemoveChildDoc(this);
+    }
+
+    mParent = nullptr;
+  }
+
+  virtual bool RecvShutdown() override;
+  void Destroy();
+  virtual void ActorDestroy(ActorDestroyReason aWhy) override
+  {
+    MOZ_DIAGNOSTIC_ASSERT(CheckDocTree());
+    if (!mShutdown)
+      Destroy();
+  }
+
+  /*
+   * Return the main processes representation of the parent document (if any)
+   * of the document this object represents.
+   */
+  DocAccessibleParent* ParentDoc() const { return mParentDoc; }
+
+  /*
+   * Called when a document in a content process notifies the main process of a
+   * new child document.
+   */
+  bool AddChildDoc(DocAccessibleParent* aChildDoc, uint64_t aParentID,
+                   bool aCreating = true);
+
+  /*
+   * Called when the document in the content process this object represents
+   * notifies the main process a child document has been removed.
+   */
+  void RemoveChildDoc(DocAccessibleParent* aChildDoc)
+  {
+    aChildDoc->Parent()->ClearChildDoc(aChildDoc);
+    mChildDocs.RemoveElement(aChildDoc);
+    aChildDoc->mParentDoc = nullptr;
+    MOZ_ASSERT(aChildDoc->mChildDocs.Length() == 0);
+  }
+
+  void RemoveAccessible(ProxyAccessible* aAccessible)
+  {
+    MOZ_DIAGNOSTIC_ASSERT(mAccessibles.GetEntry(aAccessible->ID()));
+    mAccessibles.RemoveEntry(aAccessible->ID());
+  }
+
+  /**
+   * Return the accessible for given id.
+   */
+  ProxyAccessible* GetAccessible(uintptr_t aID)
+  {
+    if (!aID)
+      return this;
+
+    ProxyEntry* e = mAccessibles.GetEntry(aID);
+    return e ? e->mProxy : nullptr;
+  }
+
+  const ProxyAccessible* GetAccessible(uintptr_t aID) const
+    { return const_cast<DocAccessibleParent*>(this)->GetAccessible(aID); }
+
+  size_t ChildDocCount() const { return mChildDocs.Length(); }
+  const DocAccessibleParent* ChildDocAt(size_t aIdx) const
+    { return mChildDocs[aIdx]; }
+
+#if defined(XP_WIN)
+  void SetCOMProxy(const RefPtr<IAccessible>& aCOMProxy);
+
+  virtual bool RecvGetWindowedPluginIAccessible(
+      const WindowsHandle& aHwnd, IAccessibleHolder* aPluginCOMProxy) override;
+#endif
+
+private:
+
+  class ProxyEntry : public PLDHashEntryHdr
+  {
+  public:
+    explicit ProxyEntry(const void*) : mProxy(nullptr) {}
+    ProxyEntry(ProxyEntry&& aOther) :
+      mProxy(aOther.mProxy) { aOther.mProxy = nullptr; }
+    ~ProxyEntry() { delete mProxy; }
+
+    typedef uint64_t KeyType;
+    typedef const void* KeyTypePointer;
+
+    bool KeyEquals(const void* aKey) const
+    { return mProxy->ID() == (uint64_t)aKey; }
+
+    static const void* KeyToPointer(uint64_t aKey) { return (void*)aKey; }
+
+    static PLDHashNumber HashKey(const void* aKey) { return (uint64_t)aKey; }
+
+    enum { ALLOW_MEMMOVE = true };
+
+    ProxyAccessible* mProxy;
+  };
+
+  uint32_t AddSubtree(ProxyAccessible* aParent,
+                      const nsTArray<AccessibleData>& aNewTree, uint32_t aIdx,
+                      uint32_t aIdxInParent);
+  MOZ_MUST_USE bool CheckDocTree() const;
+  xpcAccessibleGeneric* GetXPCAccessible(ProxyAccessible* aProxy);
+
+  nsTArray<DocAccessibleParent*> mChildDocs;
+  DocAccessibleParent* mParentDoc;
+
+  /*
+   * Conceptually this is a map from IDs to proxies, but we store the ID in the
+   * proxy object so we can't use a real map.
+   */
+  nsTHashtable<ProxyEntry> mAccessibles;
+  bool mTopLevel;
+  bool mShutdown;
+};
+
+}
+}
+
+#endif