/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=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/. */
#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::GetRowHeight() {
nsListBoxBodyFrame* body = GetListBoxBody(true);
if (body) {
return body->GetRowHeightPixels();
}
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 FlushType::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;
}