pjs/layout/forms/nsSelectsAreaFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
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*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
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*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
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#include "nsSelectsAreaFrame.h"
#include "nsCOMPtr.h"
#include "nsIDOMHTMLOptionElement.h"
#include "nsIContent.h"
#include "nsListControlFrame.h"
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nsIFrame*
NS_NewSelectsAreaFrame(nsIPresShell* aShell, PRUint32 aFlags)
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{
nsSelectsAreaFrame* it = new (aShell) nsSelectsAreaFrame;
if (it) {
// We need NS_BLOCK_SPACE_MGR to ensure that the options inside the select
// aren't expanded by right floats outside the select.
it->SetFlags(aFlags | NS_BLOCK_SPACE_MGR);
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}
return it;
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}
/*NS_IMETHODIMP
nsSelectsAreaFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
if (aIID.Equals(kAreaFrameIID)) {
nsIAreaFrame* tmp = (nsIAreaFrame*)this;
*aInstancePtr = (void*)tmp;
return NS_OK;
}
return nsAreaFrame::QueryInterface(aIID, aInstancePtr);
}
*/
//---------------------------------------------------------
PRBool
nsSelectsAreaFrame::IsOptionElement(nsIContent* aContent)
{
PRBool result = PR_FALSE;
nsCOMPtr<nsIDOMHTMLOptionElement> optElem;
if (NS_SUCCEEDED(aContent->QueryInterface(NS_GET_IID(nsIDOMHTMLOptionElement),(void**) getter_AddRefs(optElem)))) {
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if (optElem != nsnull) {
result = PR_TRUE;
}
}
return result;
}
//---------------------------------------------------------
PRBool
nsSelectsAreaFrame::IsOptionElementFrame(nsIFrame *aFrame)
{
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nsIContent *content = aFrame->GetContent();
if (content) {
return IsOptionElement(content);
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}
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return PR_FALSE;
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}
//---------------------------------------------------------
nsIFrame*
nsSelectsAreaFrame::GetFrameForPoint(const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer)
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{
nsRect thisRect(nsPoint(0,0), GetSize());
PRBool inThisFrame = thisRect.Contains(aPoint);
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if (!((mState & NS_FRAME_OUTSIDE_CHILDREN) || inThisFrame)) {
return nsnull;
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}
nsIFrame* frame = nsAreaFrame::GetFrameForPoint(aPoint, aWhichLayer);
if (frame) {
nsIFrame* selectedFrame = frame;
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while (selectedFrame && !IsOptionElementFrame(selectedFrame)) {
selectedFrame = selectedFrame->GetParent();
}
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if (selectedFrame) {
return selectedFrame;
}
// else, keep the original result as *aFrame, which could be this frame
}
return frame;
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}
NS_IMETHODIMP
nsSelectsAreaFrame::Paint(nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
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nsAreaFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer, aFlags);
nsIFrame* frame = this;
while (frame) {
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frame = frame->GetParent();
if (frame->GetType() == nsLayoutAtoms::listControlFrame) {
nsListControlFrame* listFrame = NS_STATIC_CAST(nsListControlFrame*, frame);
listFrame->PaintFocus(aRenderingContext, aWhichLayer);
return NS_OK;
}
}
return NS_OK;
}