/* -*- 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; }