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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /accessible/windows/msaa/MsaaIdGenerator.h
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Add m-esr52 at 52.6.0
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diff --git a/accessible/windows/msaa/MsaaIdGenerator.h b/accessible/windows/msaa/MsaaIdGenerator.h
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+/* -*- 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