зеркало из https://github.com/mozilla/gecko-dev.git
279 строки
9.0 KiB
C++
279 строки
9.0 KiB
C++
/* -*- 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(kNoParentDoc),
|
|
#if defined(XP_WIN)
|
|
mEmulatedWindowHandle(nullptr),
|
|
#endif // defined(XP_WIN)
|
|
mTopLevel(false),
|
|
mShutdown(false) {
|
|
MOZ_COUNT_CTOR_INHERITED(DocAccessibleParent, ProxyAccessible);
|
|
sMaxDocID++;
|
|
mActorID = sMaxDocID;
|
|
MOZ_ASSERT(!LiveDocs().Get(mActorID));
|
|
LiveDocs().Put(mActorID, this);
|
|
}
|
|
|
|
~DocAccessibleParent() {
|
|
LiveDocs().Remove(mActorID);
|
|
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; }
|
|
|
|
/**
|
|
* Mark this actor as shutdown without doing any cleanup. This should only
|
|
* be called on actors that have just been initialized, so probably only from
|
|
* RecvPDocAccessibleConstructor.
|
|
*/
|
|
void MarkAsShutdown() {
|
|
MOZ_ASSERT(mChildDocs.IsEmpty());
|
|
MOZ_ASSERT(mAccessibles.Count() == 0);
|
|
mShutdown = true;
|
|
}
|
|
|
|
/*
|
|
* Called when a message from a document in a child process notifies the main
|
|
* process it is firing an event.
|
|
*/
|
|
virtual mozilla::ipc::IPCResult RecvEvent(const uint64_t& aID,
|
|
const uint32_t& aType) override;
|
|
|
|
virtual mozilla::ipc::IPCResult RecvShowEvent(const ShowEventData& aData,
|
|
const bool& aFromUser) override;
|
|
virtual mozilla::ipc::IPCResult RecvHideEvent(const uint64_t& aRootID,
|
|
const bool& aFromUser) override;
|
|
mozilla::ipc::IPCResult RecvStateChangeEvent(const uint64_t& aID,
|
|
const uint64_t& aState,
|
|
const bool& aEnabled) final;
|
|
|
|
mozilla::ipc::IPCResult RecvCaretMoveEvent(
|
|
const uint64_t& aID,
|
|
#if defined(XP_WIN)
|
|
const LayoutDeviceIntRect& aCaretRect,
|
|
#endif
|
|
const int32_t& aOffset) final;
|
|
|
|
virtual mozilla::ipc::IPCResult RecvTextChangeEvent(
|
|
const uint64_t& aID, const nsString& aStr, const int32_t& aStart,
|
|
const uint32_t& aLen, const bool& aIsInsert,
|
|
const bool& aFromUser) override;
|
|
|
|
#if defined(XP_WIN)
|
|
virtual mozilla::ipc::IPCResult RecvSyncTextChangeEvent(
|
|
const uint64_t& aID, const nsString& aStr, const int32_t& aStart,
|
|
const uint32_t& aLen, const bool& aIsInsert,
|
|
const bool& aFromUser) override;
|
|
|
|
virtual mozilla::ipc::IPCResult RecvFocusEvent(
|
|
const uint64_t& aID, const LayoutDeviceIntRect& aCaretRect) override;
|
|
#endif // defined(XP_WIN)
|
|
|
|
virtual mozilla::ipc::IPCResult RecvSelectionEvent(
|
|
const uint64_t& aID, const uint64_t& aWidgetID,
|
|
const uint32_t& aType) override;
|
|
|
|
virtual mozilla::ipc::IPCResult RecvVirtualCursorChangeEvent(
|
|
const uint64_t& aID, const uint64_t& aOldPositionID,
|
|
const int32_t& aOldStartOffset, const int32_t& aOldEndOffset,
|
|
const uint64_t& aNewPositionID, const int32_t& aNewStartOffset,
|
|
const int32_t& aNewEndOffset, const int16_t& aReason,
|
|
const int16_t& aBoundaryType, const bool& aFromUser) override;
|
|
|
|
virtual mozilla::ipc::IPCResult RecvScrollingEvent(
|
|
const uint64_t& aID, const uint64_t& aType, const uint32_t& aScrollX,
|
|
const uint32_t& aScrollY, const uint32_t& aMaxScrollX,
|
|
const uint32_t& aMaxScrollY) override;
|
|
|
|
mozilla::ipc::IPCResult RecvRoleChangedEvent(const a11y::role& aRole) final;
|
|
|
|
virtual mozilla::ipc::IPCResult RecvBindChildDoc(
|
|
PDocAccessibleParent* aChildDoc, const uint64_t& aID) override;
|
|
|
|
void Unbind() {
|
|
if (DocAccessibleParent* parent = ParentDoc()) {
|
|
parent->RemoveChildDoc(this);
|
|
}
|
|
|
|
SetParent(nullptr);
|
|
}
|
|
|
|
virtual mozilla::ipc::IPCResult RecvShutdown() override;
|
|
void Destroy();
|
|
virtual void ActorDestroy(ActorDestroyReason aWhy) override {
|
|
MOZ_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;
|
|
static const uint64_t kNoParentDoc = UINT64_MAX;
|
|
|
|
/*
|
|
* Called when a document in a content process notifies the main process of a
|
|
* new child document.
|
|
*/
|
|
ipc::IPCResult 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) {
|
|
ProxyAccessible* parent = aChildDoc->Parent();
|
|
MOZ_ASSERT(parent);
|
|
if (parent) {
|
|
aChildDoc->Parent()->ClearChildDoc(aChildDoc);
|
|
}
|
|
DebugOnly<bool> result = mChildDocs.RemoveElement(aChildDoc->mActorID);
|
|
aChildDoc->mParentDoc = kNoParentDoc;
|
|
MOZ_ASSERT(result);
|
|
}
|
|
|
|
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 const_cast<DocAccessibleParent*>(this)->ChildDocAt(aIdx);
|
|
}
|
|
DocAccessibleParent* ChildDocAt(size_t aIdx) {
|
|
return LiveDocs().Get(mChildDocs[aIdx]);
|
|
}
|
|
|
|
#if defined(XP_WIN)
|
|
void MaybeInitWindowEmulation();
|
|
void SendParentCOMProxy();
|
|
|
|
virtual mozilla::ipc::IPCResult RecvGetWindowedPluginIAccessible(
|
|
const WindowsHandle& aHwnd, IAccessibleHolder* aPluginCOMProxy) override;
|
|
|
|
/**
|
|
* Set emulated native window handle for a document.
|
|
* @param aWindowHandle emulated native window handle
|
|
*/
|
|
void SetEmulatedWindowHandle(HWND aWindowHandle);
|
|
HWND GetEmulatedWindowHandle() const { return mEmulatedWindowHandle; }
|
|
#endif
|
|
|
|
#if !defined(XP_WIN)
|
|
virtual mozilla::ipc::IPCResult RecvBatch(
|
|
const uint64_t& aBatchType, nsTArray<BatchData>&& aData) 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<uint64_t> mChildDocs;
|
|
uint64_t mParentDoc;
|
|
|
|
#if defined(XP_WIN)
|
|
// The handle associated with the emulated window that contains this document
|
|
HWND mEmulatedWindowHandle;
|
|
|
|
#if defined(MOZ_CONTENT_SANDBOX)
|
|
mscom::PreservedStreamPtr mParentProxyStream;
|
|
#endif // defined(MOZ_CONTENT_SANDBOX)
|
|
#endif // defined(XP_WIN)
|
|
|
|
/*
|
|
* 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;
|
|
uint64_t mActorID;
|
|
bool mTopLevel;
|
|
bool mShutdown;
|
|
|
|
static uint64_t sMaxDocID;
|
|
static nsDataHashtable<nsUint64HashKey, DocAccessibleParent*>& LiveDocs() {
|
|
static nsDataHashtable<nsUint64HashKey, DocAccessibleParent*> sLiveDocs;
|
|
return sLiveDocs;
|
|
}
|
|
};
|
|
|
|
} // namespace a11y
|
|
} // namespace mozilla
|
|
|
|
#endif
|