From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- accessible/windows/msaa/MsaaIdGenerator.h | 56 +++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 accessible/windows/msaa/MsaaIdGenerator.h (limited to 'accessible/windows/msaa/MsaaIdGenerator.h') diff --git a/accessible/windows/msaa/MsaaIdGenerator.h b/accessible/windows/msaa/MsaaIdGenerator.h new file mode 100644 index 000000000..b845e8473 --- /dev/null +++ b/accessible/windows/msaa/MsaaIdGenerator.h @@ -0,0 +1,56 @@ +/* -*- 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_MsaaIdGenerator_h +#define mozilla_a11y_MsaaIdGenerator_h + +#include "mozilla/a11y/IDSet.h" + +#include "mozilla/dom/ipc/IdType.h" + +namespace mozilla { +namespace a11y { + +class AccessibleWrap; + +/** + * This class is responsible for generating child IDs used by our MSAA + * implementation. Since e10s requires us to differentiate IDs based on the + * originating process of the accessible, a portion of the ID's bits are + * allocated to storing that information. The remaining bits represent the + * unique ID of the accessible, within that content process. + * + * The constants kNumContentProcessIDBits and kNumUniqueIDBits in the + * implementation are responsible for determining the proportion of bits that + * are allocated for each purpose. + */ +class MsaaIdGenerator +{ +public: + constexpr MsaaIdGenerator(); + + uint32_t GetID(); + void ReleaseID(AccessibleWrap* aAccWrap); + bool IsChromeID(uint32_t aID); + bool IsIDForThisContentProcess(uint32_t aID); + bool IsIDForContentProcess(uint32_t aID, + dom::ContentParentId aIPCContentProcessId); + bool IsSameContentProcessFor(uint32_t aFirstID, uint32_t aSecondID); + + uint32_t GetContentProcessIDFor(dom::ContentParentId aIPCContentProcessID); + void ReleaseContentProcessIDFor(dom::ContentParentId aIPCContentProcessID); + +private: + uint32_t ResolveContentProcessID(); + +private: + IDSet mIDSet; +}; + +} // namespace a11y +} // namespace mozilla + +#endif // mozilla_a11y_MsaaIdGenerator_h -- cgit v1.2.3