gecko/layout/xul/base/src/nsProgressMeterFrame.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
*
* 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/
*
* 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.
*
* The Original Code is Mozilla Communicator client 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):
*
* 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 ***** */
//
// David Hyatt & Eric Vaughan
// Netscape Communications
//
// See documentation in associated header file
//
#include "nsProgressMeterFrame.h"
#include "nsCSSRendering.h"
#include "nsIContent.h"
#include "nsPresContext.h"
#include "nsGkAtoms.h"
#include "nsINameSpaceManager.h"
#include "nsCOMPtr.h"
#include "nsBoxLayoutState.h"
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#include "nsIReflowCallback.h"
//
// NS_NewToolbarFrame
//
// Creates a new Toolbar frame and returns it
//
nsIFrame*
NS_NewProgressMeterFrame (nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsProgressMeterFrame(aPresShell, aContext);
} // NS_NewProgressMeterFrame
//
// nsProgressMeterFrame dstr
//
// Cleanup, if necessary
//
nsProgressMeterFrame :: ~nsProgressMeterFrame ( )
{
}
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class nsAsyncProgressMeterInit : public nsIReflowCallback
{
public:
nsAsyncProgressMeterInit(nsIFrame* aFrame) : mWeakFrame(aFrame) {}
virtual PRBool ReflowFinished()
{
PRBool shouldFlush = PR_FALSE;
nsIFrame* frame = mWeakFrame.GetFrame();
if (frame) {
frame->AttributeChanged(kNameSpaceID_None, nsGkAtoms::value, 0);
shouldFlush = PR_TRUE;
}
delete this;
return shouldFlush;
}
virtual void ReflowCallbackCanceled()
{
delete this;
}
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nsWeakFrame mWeakFrame;
};
NS_IMETHODIMP
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nsProgressMeterFrame::DoLayout(nsBoxLayoutState& aState)
{
if (mNeedsReflowCallback) {
nsIReflowCallback* cb = new nsAsyncProgressMeterInit(this);
if (cb) {
PresContext()->PresShell()->PostReflowCallback(cb);
}
mNeedsReflowCallback = PR_FALSE;
}
return nsBoxFrame::DoLayout(aState);
}
NS_IMETHODIMP
nsProgressMeterFrame::AttributeChanged(PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aModType)
{
nsresult rv = nsBoxFrame::AttributeChanged(aNameSpaceID, aAttribute,
aModType);
if (NS_OK != rv) {
return rv;
}
// did the progress change?
if (nsGkAtoms::value == aAttribute) {
nsIFrame* barChild = GetFirstChild(nsnull);
if (!barChild) return NS_OK;
nsIFrame* remainderChild = barChild->GetNextSibling();
if (!remainderChild) return NS_OK;
nsCOMPtr<nsIContent> remainderContent = remainderChild->GetContent();
if (!remainderContent) return NS_OK;
nsAutoString value;
mContent->GetAttr(kNameSpaceID_None, nsGkAtoms::value, value);
PRInt32 error;
PRInt32 flex = value.ToInteger(&error);
if (flex < 0) flex = 0;
if (flex > 100) flex = 100;
PRInt32 remainder = 100 - flex;
nsAutoString leftFlex, rightFlex;
leftFlex.AppendInt(flex);
rightFlex.AppendInt(remainder);
nsWeakFrame weakFrame(this);
barChild->GetContent()->SetAttr(kNameSpaceID_None, nsGkAtoms::flex, leftFlex, PR_TRUE);
remainderContent->SetAttr(kNameSpaceID_None, nsGkAtoms::flex, rightFlex, PR_TRUE);
if (weakFrame.IsAlive()) {
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange, NS_FRAME_IS_DIRTY);
}
}
return NS_OK;
}
#ifdef NS_DEBUG
NS_IMETHODIMP
nsProgressMeterFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("ProgressMeter"), aResult);
}
#endif