mirror of
https://github.com/classilla/tenfourfox.git
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239 lines
4.9 KiB
C++
239 lines
4.9 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/dom/ListBoxObject.h"
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#include "nsCOMPtr.h"
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#include "nsIFrame.h"
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#include "nsGkAtoms.h"
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#include "nsIScrollableFrame.h"
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#include "nsListBoxBodyFrame.h"
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#include "ChildIterator.h"
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#include "mozilla/dom/Element.h"
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#include "mozilla/dom/ListBoxObjectBinding.h"
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namespace mozilla {
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namespace dom {
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NS_IMPL_ISUPPORTS_INHERITED(ListBoxObject, BoxObject, nsIListBoxObject,
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nsPIListBoxObject)
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ListBoxObject::ListBoxObject()
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: mListBoxBody(nullptr)
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{
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}
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ListBoxObject::~ListBoxObject()
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{
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}
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JSObject* ListBoxObject::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
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{
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return ListBoxObjectBinding::Wrap(aCx, this, aGivenProto);
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}
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// nsIListBoxObject
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NS_IMETHODIMP
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ListBoxObject::GetRowCount(int32_t *aResult)
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{
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*aResult = GetRowCount();
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return NS_OK;
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}
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NS_IMETHODIMP
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ListBoxObject::GetItemAtIndex(int32_t index, nsIDOMElement **_retval)
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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return body->GetItemAtIndex(index, _retval);
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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ListBoxObject::GetIndexOfItem(nsIDOMElement* aElement, int32_t *aResult)
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{
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*aResult = 0;
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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return body->GetIndexOfItem(aElement, aResult);
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}
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return NS_OK;
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}
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// ListBoxObject
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int32_t
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ListBoxObject::GetRowCount()
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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return body->GetRowCount();
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}
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return 0;
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}
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int32_t
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ListBoxObject::GetNumberOfVisibleRows()
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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return body->GetNumberOfVisibleRows();
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}
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return 0;
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}
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int32_t
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ListBoxObject::GetIndexOfFirstVisibleRow()
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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return body->GetIndexOfFirstVisibleRow();
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}
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return 0;
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}
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void
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ListBoxObject::EnsureIndexIsVisible(int32_t aRowIndex)
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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body->EnsureIndexIsVisible(aRowIndex);
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}
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}
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void
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ListBoxObject::ScrollToIndex(int32_t aRowIndex)
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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body->ScrollToIndex(aRowIndex);
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}
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}
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void
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ListBoxObject::ScrollByLines(int32_t aNumLines)
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{
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nsListBoxBodyFrame* body = GetListBoxBody(true);
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if (body) {
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body->ScrollByLines(aNumLines);
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}
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}
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already_AddRefed<Element>
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ListBoxObject::GetItemAtIndex(int32_t index)
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{
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nsCOMPtr<nsIDOMElement> el;
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GetItemAtIndex(index, getter_AddRefs(el));
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nsCOMPtr<Element> ret(do_QueryInterface(el));
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return ret.forget();
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}
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int32_t
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ListBoxObject::GetIndexOfItem(Element& aElement)
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{
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int32_t ret;
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nsCOMPtr<nsIDOMElement> el(do_QueryInterface(&aElement));
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GetIndexOfItem(el, &ret);
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return ret;
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}
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//////////////////////
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static nsIContent*
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FindBodyContent(nsIContent* aParent)
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{
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if (aParent->IsXULElement(nsGkAtoms::listboxbody)) {
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return aParent;
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}
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mozilla::dom::FlattenedChildIterator iter(aParent);
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for (nsIContent* child = iter.GetNextChild(); child; child = iter.GetNextChild()) {
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nsIContent* result = FindBodyContent(child);
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if (result) {
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return result;
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}
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}
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return nullptr;
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}
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nsListBoxBodyFrame*
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ListBoxObject::GetListBoxBody(bool aFlush)
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{
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if (mListBoxBody) {
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return mListBoxBody;
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}
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nsIPresShell* shell = GetPresShell(false);
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if (!shell) {
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return nullptr;
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}
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nsIFrame* frame = aFlush ?
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GetFrame(false) /* does Flush_Frames */ :
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mContent->GetPrimaryFrame();
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if (!frame) {
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return nullptr;
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}
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// Iterate over our content model children looking for the body.
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nsCOMPtr<nsIContent> content = FindBodyContent(frame->GetContent());
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if (!content) {
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return nullptr;
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}
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// this frame will be a nsGFXScrollFrame
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frame = content->GetPrimaryFrame();
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if (!frame) {
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return nullptr;
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}
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nsIScrollableFrame* scrollFrame = do_QueryFrame(frame);
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if (!scrollFrame) {
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return nullptr;
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}
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// this frame will be the one we want
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nsIFrame* yeahBaby = scrollFrame->GetScrolledFrame();
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if (!yeahBaby) {
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return nullptr;
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}
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// It's a frame. Refcounts are irrelevant.
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nsListBoxBodyFrame* listBoxBody = do_QueryFrame(yeahBaby);
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NS_ENSURE_TRUE(listBoxBody &&
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listBoxBody->SetBoxObject(this),
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nullptr);
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mListBoxBody = listBoxBody;
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return mListBoxBody;
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}
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void
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ListBoxObject::Clear()
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{
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ClearCachedValues();
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BoxObject::Clear();
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}
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void
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ListBoxObject::ClearCachedValues()
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{
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mListBoxBody = nullptr;
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}
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} // namespace dom
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} // namespace mozilla
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// Creation Routine ///////////////////////////////////////////////////////////////////////
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nsresult
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NS_NewListBoxObject(nsIBoxObject** aResult)
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{
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NS_ADDREF(*aResult = new mozilla::dom::ListBoxObject());
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return NS_OK;
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}
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