/* -*- 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 the Mozilla SVG project.
 *
 * The Initial Developer of the Original Code is IBM Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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 ***** */

#include "nsSVGContainerFrame.h"
#include "nsSVGUtils.h"
#include "nsSVGOuterSVGFrame.h"

//----------------------------------------------------------------------
// nsISupports methods

NS_INTERFACE_MAP_BEGIN(nsSVGDisplayContainerFrame)
  NS_INTERFACE_MAP_ENTRY(nsISVGChildFrame)
NS_INTERFACE_MAP_END_INHERITING(nsSVGContainerFrame)

nsIFrame*
NS_NewSVGContainerFrame(nsIPresShell* aPresShell,
                        nsIContent* aContent,
                        nsStyleContext* aContext)
{
  return new (aPresShell) nsSVGContainerFrame(aContext);
}

NS_IMETHODIMP
nsSVGContainerFrame::AppendFrames(nsIAtom* aListName,
                                  nsIFrame* aFrameList)
{
  return InsertFrames(aListName, mFrames.LastChild(), aFrameList);  
}

NS_IMETHODIMP
nsSVGContainerFrame::InsertFrames(nsIAtom* aListName,
                                  nsIFrame* aPrevFrame,
                                  nsIFrame* aFrameList)
{
  NS_ASSERTION(!aListName, "unexpected child list");
  NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
               "inserting after sibling frame with different parent");

  mFrames.InsertFrames(this, aPrevFrame, aFrameList);

  return NS_OK;
}

NS_IMETHODIMP
nsSVGContainerFrame::RemoveFrame(nsIAtom* aListName,
                                 nsIFrame* aOldFrame)
{
  NS_ASSERTION(!aListName, "unexpected child list");

  return mFrames.DestroyFrame(aOldFrame) ? NS_OK : NS_ERROR_FAILURE;
}

NS_IMETHODIMP
nsSVGContainerFrame::Init(nsIContent* aContent,
                          nsIFrame* aParent,
                          nsIFrame* aPrevInFlow)
{
  AddStateBits(NS_STATE_SVG_NONDISPLAY_CHILD);
  nsresult rv = nsSVGContainerFrameBase::Init(aContent, aParent, aPrevInFlow);
  return rv;
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::Init(nsIContent* aContent,
                                 nsIFrame* aParent,
                                 nsIFrame* aPrevInFlow)
{
  if (!(GetStateBits() & NS_STATE_IS_OUTER_SVG)) {
    AddStateBits(aParent->GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD);
  }
  nsresult rv = nsSVGContainerFrameBase::Init(aContent, aParent, aPrevInFlow);
  return rv;
}

void
nsSVGDisplayContainerFrame::Destroy()
{
  nsSVGUtils::StyleEffects(this);
  nsSVGContainerFrame::Destroy();
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::InsertFrames(nsIAtom* aListName,
                                         nsIFrame* aPrevFrame,
                                         nsIFrame* aFrameList)
{
  // memorize last new frame
  nsIFrame* lastNewFrame = nsnull;
  {
    nsFrameList tmpList(aFrameList);
    lastNewFrame = tmpList.LastChild();
  }
  
  // Insert the new frames
  nsSVGContainerFrame::InsertFrames(aListName, aPrevFrame, aFrameList);

  // Call InitialUpdate on the new frames ONLY if our nsSVGOuterSVGFrame has had
  // its initial reflow (our NS_FRAME_FIRST_REFLOW bit is clear) - bug 399863.
  if (!(GetStateBits() & NS_FRAME_FIRST_REFLOW)) {
    nsIFrame* end = nsnull;
    if (lastNewFrame)
      end = lastNewFrame->GetNextSibling();

    for (nsIFrame* kid = aFrameList; kid != end;
         kid = kid->GetNextSibling()) {
      nsISVGChildFrame* SVGFrame = nsnull;
      CallQueryInterface(kid, &SVGFrame);
      if (SVGFrame) {
        SVGFrame->InitialUpdate(); 
      }
    }
  }

  return NS_OK;
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::RemoveFrame(nsIAtom* aListName,
                                        nsIFrame* aOldFrame)
{
  if (!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)) {
    nsSVGOuterSVGFrame* outerSVGFrame = nsSVGUtils::GetOuterSVGFrame(this);
    NS_ASSERTION(outerSVGFrame, "no outer svg frame");
    if (outerSVGFrame)
      outerSVGFrame->InvalidateCoveredRegion(aOldFrame);
  }

  nsresult rv = nsSVGContainerFrame::RemoveFrame(aListName, aOldFrame);

  if (!(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD)) {
    nsSVGUtils::NotifyAncestorsOfFilterRegionChange(this);
  }

  return rv;
}

//----------------------------------------------------------------------
// nsISVGChildFrame methods

NS_IMETHODIMP
nsSVGDisplayContainerFrame::PaintSVG(nsSVGRenderState* aContext,
                                     nsRect *aDirtyRect)
{
  const nsStyleDisplay *display = mStyleContext->GetStyleDisplay();
  if (display->mOpacity == 0.0)
    return NS_OK;

  for (nsIFrame* kid = mFrames.FirstChild(); kid;
       kid = kid->GetNextSibling()) {
    nsSVGUtils::PaintChildWithEffects(aContext, aDirtyRect, kid);
  }

  return NS_OK;
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::GetFrameForPointSVG(float x, float y, nsIFrame** hit)
{
  nsSVGUtils::HitTestChildren(this, x, y, hit);
  
  return NS_OK;
}

NS_IMETHODIMP_(nsRect)
nsSVGDisplayContainerFrame::GetCoveredRegion()
{
  return nsSVGUtils::GetCoveredRegion(mFrames);
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::UpdateCoveredRegion()
{
  for (nsIFrame* kid = mFrames.FirstChild(); kid;
       kid = kid->GetNextSibling()) {
    nsISVGChildFrame* SVGFrame = nsnull;
    CallQueryInterface(kid, &SVGFrame);
    if (SVGFrame) {
      SVGFrame->UpdateCoveredRegion();
    }
  }
  return NS_OK;
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::InitialUpdate()
{
  NS_ASSERTION(GetStateBits() & NS_FRAME_FIRST_REFLOW,
               "Yikes! We've been called already! Hopefully we weren't called "
               "before our nsSVGOuterSVGFrame's initial Reflow()!!!");

  for (nsIFrame* kid = mFrames.FirstChild(); kid;
       kid = kid->GetNextSibling()) {
    nsISVGChildFrame* SVGFrame = nsnull;
    CallQueryInterface(kid, &SVGFrame);
    if (SVGFrame) {
      SVGFrame->InitialUpdate();
    }
  }

  NS_ASSERTION(!(mState & NS_FRAME_IN_REFLOW),
               "We don't actually participate in reflow");
  
  // Do unset the various reflow bits, though.
  mState &= ~(NS_FRAME_FIRST_REFLOW | NS_FRAME_IS_DIRTY |
              NS_FRAME_HAS_DIRTY_CHILDREN);
  
  return NS_OK;
}  

void
nsSVGDisplayContainerFrame::NotifySVGChanged(PRUint32 aFlags)
{
  NS_ASSERTION(aFlags & (TRANSFORM_CHANGED | COORD_CONTEXT_CHANGED),
               "Invalidation logic may need adjusting");

  if (!(aFlags & SUPPRESS_INVALIDATION) &&
      !(GetStateBits() & NS_STATE_SVG_NONDISPLAY_CHILD))
    nsSVGUtils::UpdateFilterRegion(this);

  nsSVGUtils::NotifyChildrenOfSVGChange(this, aFlags);
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::NotifyRedrawSuspended()
{
  for (nsIFrame* kid = mFrames.FirstChild(); kid;
       kid = kid->GetNextSibling()) {
    nsISVGChildFrame* SVGFrame=nsnull;
    CallQueryInterface(kid, &SVGFrame);
    if (SVGFrame) {
      SVGFrame->NotifyRedrawSuspended();
    }
  }
  return NS_OK;
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::NotifyRedrawUnsuspended()
{
  for (nsIFrame* kid = mFrames.FirstChild(); kid;
       kid = kid->GetNextSibling()) {
    nsISVGChildFrame* SVGFrame = nsnull;
    CallQueryInterface(kid, &SVGFrame);
    if (SVGFrame) {
      SVGFrame->NotifyRedrawUnsuspended();
    }
  }
  return NS_OK;
}

NS_IMETHODIMP
nsSVGDisplayContainerFrame::GetBBox(nsIDOMSVGRect **_retval)
{
  return nsSVGUtils::GetBBox(&mFrames, _retval);
}