From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 layout/xul/ListBoxObject.cpp | 238 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 238 insertions(+)
 create mode 100644 layout/xul/ListBoxObject.cpp

(limited to 'layout/xul/ListBoxObject.cpp')

diff --git a/layout/xul/ListBoxObject.cpp b/layout/xul/ListBoxObject.cpp
new file mode 100644
index 000000000..435065f5b
--- /dev/null
+++ b/layout/xul/ListBoxObject.cpp
@@ -0,0 +1,238 @@
+/* -*- 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 "mozilla/dom/ListBoxObject.h"
+#include "nsCOMPtr.h"
+#include "nsIFrame.h"
+#include "nsGkAtoms.h"
+#include "nsIScrollableFrame.h"
+#include "nsListBoxBodyFrame.h"
+#include "ChildIterator.h"
+#include "mozilla/dom/Element.h"
+#include "mozilla/dom/ListBoxObjectBinding.h"
+
+namespace mozilla {
+namespace dom {
+
+NS_IMPL_ISUPPORTS_INHERITED(ListBoxObject, BoxObject, nsIListBoxObject,
+                            nsPIListBoxObject)
+
+ListBoxObject::ListBoxObject()
+  : mListBoxBody(nullptr)
+{
+}
+
+ListBoxObject::~ListBoxObject()
+{
+}
+
+JSObject* ListBoxObject::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return ListBoxObjectBinding::Wrap(aCx, this, aGivenProto);
+}
+
+// nsIListBoxObject
+NS_IMETHODIMP
+ListBoxObject::GetRowCount(int32_t *aResult)
+{
+  *aResult = GetRowCount();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+ListBoxObject::GetItemAtIndex(int32_t index, nsIDOMElement **_retval)
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    return body->GetItemAtIndex(index, _retval);
+  }
+  return NS_OK;
+ }
+
+NS_IMETHODIMP
+ListBoxObject::GetIndexOfItem(nsIDOMElement* aElement, int32_t *aResult)
+{
+  *aResult = 0;
+
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    return body->GetIndexOfItem(aElement, aResult);
+  }
+  return NS_OK;
+}
+
+// ListBoxObject
+
+int32_t
+ListBoxObject::GetRowCount()
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    return body->GetRowCount();
+  }
+  return 0;
+}
+
+int32_t
+ListBoxObject::GetNumberOfVisibleRows()
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    return body->GetNumberOfVisibleRows();
+  }
+  return 0;
+}
+
+int32_t
+ListBoxObject::GetIndexOfFirstVisibleRow()
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    return body->GetIndexOfFirstVisibleRow();
+  }
+  return 0;
+}
+
+void
+ListBoxObject::EnsureIndexIsVisible(int32_t aRowIndex)
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    body->EnsureIndexIsVisible(aRowIndex);
+  }
+}
+
+void
+ListBoxObject::ScrollToIndex(int32_t aRowIndex)
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    body->ScrollToIndex(aRowIndex);
+  }
+}
+
+void
+ListBoxObject::ScrollByLines(int32_t aNumLines)
+{
+  nsListBoxBodyFrame* body = GetListBoxBody(true);
+  if (body) {
+    body->ScrollByLines(aNumLines);
+  }
+}
+
+already_AddRefed<Element>
+ListBoxObject::GetItemAtIndex(int32_t index)
+{
+  nsCOMPtr<nsIDOMElement> el;
+  GetItemAtIndex(index, getter_AddRefs(el));
+  nsCOMPtr<Element> ret(do_QueryInterface(el));
+  return ret.forget();
+}
+
+int32_t
+ListBoxObject::GetIndexOfItem(Element& aElement)
+{
+  int32_t ret;
+  nsCOMPtr<nsIDOMElement> el(do_QueryInterface(&aElement));
+  GetIndexOfItem(el, &ret);
+  return ret;
+}
+
+//////////////////////
+
+static nsIContent*
+FindBodyContent(nsIContent* aParent)
+{
+  if (aParent->IsXULElement(nsGkAtoms::listboxbody)) {
+    return aParent;
+  }
+
+  mozilla::dom::FlattenedChildIterator iter(aParent);
+  for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
+    nsIContent* result = FindBodyContent(child);
+    if (result) {
+      return result;
+    }
+  }
+
+  return nullptr;
+}
+
+nsListBoxBodyFrame*
+ListBoxObject::GetListBoxBody(bool aFlush)
+{
+  if (mListBoxBody) {
+    return mListBoxBody;
+  }
+
+  nsIPresShell* shell = GetPresShell(false);
+  if (!shell) {
+    return nullptr;
+  }
+
+  nsIFrame* frame = aFlush ?
+                      GetFrame(false) /* does Flush_Frames */ :
+                      mContent->GetPrimaryFrame();
+  if (!frame) {
+    return nullptr;
+  }
+
+  // Iterate over our content model children looking for the body.
+  nsCOMPtr<nsIContent> content = FindBodyContent(frame->GetContent());
+
+  if (!content) {
+    return nullptr;
+  }
+
+  // this frame will be a nsGFXScrollFrame
+  frame = content->GetPrimaryFrame();
+  if (!frame) {
+     return nullptr;
+  }
+
+  nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
+  if (!scrollFrame) {
+    return nullptr;
+  }
+
+  // this frame will be the one we want
+  nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
+  if (!yeahBaby) {
+     return nullptr;
+  }
+
+  // It's a frame. Refcounts are irrelevant.
+  nsListBoxBodyFrame* listBoxBody = do_QueryFrame(yeahBaby);
+  NS_ENSURE_TRUE(listBoxBody &&
+                 listBoxBody->SetBoxObject(this),
+                 nullptr);
+  mListBoxBody = listBoxBody;
+  return mListBoxBody;
+}
+
+void
+ListBoxObject::Clear()
+{
+  ClearCachedValues();
+  BoxObject::Clear();
+}
+
+void
+ListBoxObject::ClearCachedValues()
+{
+  mListBoxBody = nullptr;
+}
+
+} // namespace dom
+} // namespace mozilla
+
+// Creation Routine ///////////////////////////////////////////////////////////////////////
+
+nsresult
+NS_NewListBoxObject(nsIBoxObject** aResult)
+{
+  NS_ADDREF(*aResult = new mozilla::dom::ListBoxObject());
+  return NS_OK;
+}
-- 
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