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/* -*- 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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