зеркало из https://github.com/mozilla/gecko-dev.git
119 строки
3.4 KiB
C++
119 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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* Pierre Phaneuf <pp@ludusdesign.com>
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*/
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#include "nsSelectsAreaFrame.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMHTMLOptionElement.h"
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#include "nsIContent.h"
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#include "nsIStyleContext.h"
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nsresult
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NS_NewSelectsAreaFrame(nsIPresShell* aShell, nsIFrame** aNewFrame, PRUint32 aFlags)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsSelectsAreaFrame* it = new (aShell) nsSelectsAreaFrame;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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it->SetFlags(aFlags);
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*aNewFrame = it;
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return NS_OK;
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}
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/*NS_IMETHODIMP
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nsSelectsAreaFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
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{
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if (NULL == aInstancePtr) {
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return NS_ERROR_NULL_POINTER;
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}
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if (aIID.Equals(kAreaFrameIID)) {
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nsIAreaFrame* tmp = (nsIAreaFrame*)this;
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*aInstancePtr = (void*)tmp;
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return NS_OK;
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}
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return nsAreaFrame::QueryInterface(aIID, aInstancePtr);
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}
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*/
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//---------------------------------------------------------
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PRBool
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nsSelectsAreaFrame::IsOptionElement(nsIContent* aContent)
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{
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PRBool result = PR_FALSE;
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nsCOMPtr<nsIDOMHTMLOptionElement> optElem;
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if (NS_SUCCEEDED(aContent->QueryInterface(NS_GET_IID(nsIDOMHTMLOptionElement),(void**) getter_AddRefs(optElem)))) {
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if (optElem != nsnull) {
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result = PR_TRUE;
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}
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}
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return result;
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}
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//---------------------------------------------------------
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PRBool
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nsSelectsAreaFrame::IsOptionElementFrame(nsIFrame *aFrame)
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{
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nsIContent *content = nsnull;
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aFrame->GetContent(&content);
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PRBool result = PR_FALSE;
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if (nsnull != content) {
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result = IsOptionElement(content);
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NS_RELEASE(content);
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}
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return(result);
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}
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//---------------------------------------------------------
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NS_IMETHODIMP
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nsSelectsAreaFrame::GetFrameForPoint(nsIPresContext* aPresContext,
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const nsPoint& aPoint,
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nsFramePaintLayer aWhichLayer,
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nsIFrame** aFrame)
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{
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PRBool inThisFrame = mRect.Contains(aPoint);
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if (!((mState & NS_FRAME_OUTSIDE_CHILDREN) || inThisFrame )) {
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return NS_ERROR_FAILURE;
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}
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nsresult result = nsAreaFrame::GetFrameForPoint(aPresContext, aPoint, aWhichLayer, aFrame);
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if (result == NS_OK) {
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nsIFrame* selectedFrame = *aFrame;
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while ((nsnull != selectedFrame) && (PR_FALSE == IsOptionElementFrame(selectedFrame))) {
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selectedFrame->GetParent(&selectedFrame);
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}
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if (nsnull != selectedFrame) {
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*aFrame = selectedFrame;
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}
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// else, keep the original result as *aFrame, which could be this frame
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}
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return result;
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}
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