Add m-esr52 at 52.6.0

1 files changed, 90 insertions, 0 deletions

diff --git a/widget/windows/IEnumFE.h b/widget/windows/IEnumFE.h
new file mode 100644
index 000000000..d3875865a
--- /dev/null
+++ b/widget/windows/IEnumFE.h
@@ -0,0 +1,90 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 IEnumeFE_h__
+#define IEnumeFE_h__
+
+/*
+ * CEnumFormatEtc - implements IEnumFORMATETC
+ */
+
+#include <ole2.h>
+
+#include "nsTArray.h"
+#include "mozilla/Attributes.h"
+
+// FORMATETC container
+class FormatEtc
+{
+public:
+  FormatEtc() { memset(&mFormat, 0, sizeof(FORMATETC)); }
+  FormatEtc(const FormatEtc& copy) { CopyIn(&copy.mFormat); }
+  ~FormatEtc() { if (mFormat.ptd) CoTaskMemFree(mFormat.ptd); }
+
+  void CopyIn(const FORMATETC *aSrc) {
+    if (!aSrc) {
+        memset(&mFormat, 0, sizeof(FORMATETC));
+        return;
+    }
+    mFormat = *aSrc;
+    if (aSrc->ptd) {
+        mFormat.ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
+        *(mFormat.ptd) = *(aSrc->ptd);
+    }
+  }
+
+  void CopyOut(LPFORMATETC aDest) {
+    if (!aDest)
+        return;
+    *aDest = mFormat;
+    if (mFormat.ptd) {
+        aDest->ptd = (DVTARGETDEVICE*)CoTaskMemAlloc(sizeof(DVTARGETDEVICE));
+        *(aDest->ptd) = *(mFormat.ptd);
+    }
+  }
+
+private:
+  FORMATETC mFormat;
+};
+
+/*
+ * CEnumFormatEtc is created within IDataObject::EnumFormatEtc. This object lives
+ * on its own, that is, QueryInterface only knows IUnknown and IEnumFormatEtc,
+ * nothing more.  We still use an outer unknown for reference counting, because as
+ * long as this enumerator lives, the data object should live, thereby keeping the
+ * application up.
+ */
+
+class CEnumFormatEtc final : public IEnumFORMATETC
+{
+public:
+    CEnumFormatEtc(nsTArray<FormatEtc>& aArray);
+    CEnumFormatEtc();
+    ~CEnumFormatEtc();
+
+    // IUnknown impl.
+    STDMETHODIMP QueryInterface(REFIID riid, LPVOID *ppv);
+    STDMETHODIMP_(ULONG) AddRef();
+    STDMETHODIMP_(ULONG) Release();
+
+    // IEnumFORMATETC impl.
+    STDMETHODIMP Next(ULONG aMaxToFetch, FORMATETC *aResult, ULONG *aNumFetched);
+    STDMETHODIMP Skip(ULONG aSkipNum);
+    STDMETHODIMP Reset();
+    STDMETHODIMP Clone(LPENUMFORMATETC *aResult); // Addrefs
+
+    // Utils 
+    void AddFormatEtc(LPFORMATETC aFormat);
+
+private:
+    nsTArray<FormatEtc> mFormatList; // Formats
+    ULONG mRefCnt; // Object reference count
+    ULONG mCurrentIdx; // Current element
+
+    void SetIndex(uint32_t aIdx);
+};
+
+
+#endif //_IENUMFE_H_