diff -r 000000000000 -r 6474c204b198 dom/base/nsQueryContentEventResult.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/base/nsQueryContentEventResult.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,153 @@
+/* -*- 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/. */
+
+#include "nsQueryContentEventResult.h"
+#include "nsIWidget.h"
+#include "nsPoint.h"
+#include "mozilla/TextEvents.h"
+
+using namespace mozilla;
+
+NS_INTERFACE_MAP_BEGIN(nsQueryContentEventResult)
+  NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIQueryContentEventResult)
+  NS_INTERFACE_MAP_ENTRY(nsIQueryContentEventResult)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_ADDREF(nsQueryContentEventResult)
+NS_IMPL_RELEASE(nsQueryContentEventResult)
+
+nsQueryContentEventResult::nsQueryContentEventResult() :
+  mEventID(0), mSucceeded(false)
+{
+}
+
+nsQueryContentEventResult::~nsQueryContentEventResult()
+{
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetOffset(uint32_t *aOffset)
+{
+  bool notFound;
+  nsresult rv = GetNotFound(&notFound);
+  NS_ENSURE_SUCCESS(rv, rv);
+  NS_ENSURE_TRUE(!notFound, NS_ERROR_NOT_AVAILABLE);
+  *aOffset = mOffset;
+  return NS_OK;
+}
+
+static bool IsRectEnabled(uint32_t aEventID)
+{
+  return aEventID == NS_QUERY_CARET_RECT ||
+         aEventID == NS_QUERY_TEXT_RECT ||
+         aEventID == NS_QUERY_EDITOR_RECT ||
+         aEventID == NS_QUERY_CHARACTER_AT_POINT;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetReversed(bool *aReversed)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(mEventID == NS_QUERY_SELECTED_TEXT,
+                 NS_ERROR_NOT_AVAILABLE);
+  *aReversed = mReversed;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetLeft(int32_t *aLeft)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(IsRectEnabled(mEventID),
+                 NS_ERROR_NOT_AVAILABLE);
+  *aLeft = mRect.x;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetWidth(int32_t *aWidth)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(IsRectEnabled(mEventID),
+                 NS_ERROR_NOT_AVAILABLE);
+  *aWidth = mRect.width;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetTop(int32_t *aTop)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(IsRectEnabled(mEventID),
+                 NS_ERROR_NOT_AVAILABLE);
+  *aTop = mRect.y;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetHeight(int32_t *aHeight)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(IsRectEnabled(mEventID),
+                 NS_ERROR_NOT_AVAILABLE);
+  *aHeight = mRect.height;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetText(nsAString &aText)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(mEventID == NS_QUERY_SELECTED_TEXT ||
+                 mEventID == NS_QUERY_TEXT_CONTENT,
+                 NS_ERROR_NOT_AVAILABLE);
+  aText = mString;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetSucceeded(bool *aSucceeded)
+{
+  NS_ENSURE_TRUE(mEventID != 0, NS_ERROR_NOT_INITIALIZED);
+  *aSucceeded = mSucceeded;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+nsQueryContentEventResult::GetNotFound(bool *aNotFound)
+{
+  NS_ENSURE_TRUE(mSucceeded, NS_ERROR_NOT_AVAILABLE);
+  NS_ENSURE_TRUE(mEventID == NS_QUERY_SELECTED_TEXT ||
+                 mEventID == NS_QUERY_CHARACTER_AT_POINT,
+                 NS_ERROR_NOT_AVAILABLE);
+  *aNotFound = (mOffset == WidgetQueryContentEvent::NOT_FOUND);
+  return NS_OK;
+}
+
+void
+nsQueryContentEventResult::SetEventResult(nsIWidget* aWidget,
+                                          const WidgetQueryContentEvent &aEvent)
+{
+  mEventID = aEvent.message;
+  mSucceeded = aEvent.mSucceeded;
+  mReversed = aEvent.mReply.mReversed;
+  mRect = aEvent.mReply.mRect;
+  mOffset = aEvent.mReply.mOffset;
+  mString = aEvent.mReply.mString;
+
+  if (!IsRectEnabled(mEventID) || !aWidget || !mSucceeded) {
+    return;
+  }
+
+  nsIWidget* topWidget = aWidget->GetTopLevelWidget();
+  if (!topWidget || topWidget == aWidget) {
+    return;
+  }
+
+  // Convert the top widget related coordinates to the given widget's.
+  nsIntPoint offset =
+    aWidget->WidgetToScreenOffset() - topWidget->WidgetToScreenOffset();
+  mRect.MoveBy(-offset);
+}