зеркало из https://github.com/mozilla/gecko-dev.git
134 строки
4.3 KiB
C++
134 строки
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All 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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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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