/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

//

// Eric Vaughan

// Netscape Communications

//

// See documentation in associated header file

//

#include "nsLeafBoxFrame.h"

#include "nsBoxFrame.h"

#include "nsCOMPtr.h"

#include "nsGkAtoms.h"

#include "nsPresContext.h"

#include "mozilla/ComputedStyle.h"

#include "nsIContent.h"

#include "nsNameSpaceManager.h"

#include "nsBoxLayoutState.h"

#include "nsWidgetsCID.h"

#include "nsViewManager.h"

#include "nsContainerFrame.h"

#include "nsDisplayList.h"

#include <algorithm>

using namespace mozilla;

//

// NS_NewLeafBoxFrame

//

// Creates a new Toolbar frame and returns it

//

nsIFrame*

NS_NewLeafBoxFrame (nsIPresShell* aPresShell, ComputedStyle* aStyle)

{

  return new (aPresShell) nsLeafBoxFrame(aStyle);

}

NS_IMPL_FRAMEARENA_HELPERS(nsLeafBoxFrame)

/**

 * Initialize us. This is a good time to get the alignment of the box

 */

void

nsLeafBoxFrame::Init(nsIContent*       aContent,

                     nsContainerFrame* aParent,

                     nsIFrame*         aPrevInFlow)

{

  nsLeafFrame::Init(aContent, aParent, aPrevInFlow);

  if (GetStateBits() & NS_FRAME_FONT_INFLATION_CONTAINER) {

    AddStateBits(NS_FRAME_FONT_INFLATION_FLOW_ROOT);

  }

  UpdateMouseThrough();

}

nsresult

nsLeafBoxFrame::AttributeChanged(int32_t aNameSpaceID,

                                 nsAtom* aAttribute,

                                 int32_t aModType)

{

  nsresult rv = nsLeafFrame::AttributeChanged(aNameSpaceID, aAttribute,

                                              aModType);

  if (aAttribute == nsGkAtoms::mousethrough)

    UpdateMouseThrough();

  return rv;

}

void nsLeafBoxFrame::UpdateMouseThrough()

{

  static Element::AttrValuesArray strings[] =

    {&nsGkAtoms::never, &nsGkAtoms::always, nullptr};

  switch (mContent->AsElement()->FindAttrValueIn(kNameSpaceID_None,

                                                 nsGkAtoms::mousethrough,

                                                 strings, eCaseMatters)) {

    case 0: AddStateBits(NS_FRAME_MOUSE_THROUGH_NEVER); break;

    case 1: AddStateBits(NS_FRAME_MOUSE_THROUGH_ALWAYS); break;

    case 2: {

        RemoveStateBits(NS_FRAME_MOUSE_THROUGH_ALWAYS);

        RemoveStateBits(NS_FRAME_MOUSE_THROUGH_NEVER);

        break;

    }

  }

}

void

nsLeafBoxFrame::BuildDisplayList(nsDisplayListBuilder*   aBuilder,

                                 const nsDisplayListSet& aLists)

{

  // REVIEW: GetFrameForPoint used to not report events for the background

  // layer, whereas this code will put an event receiver for this frame in the

  // BlockBorderBackground() list. But I don't see any need to preserve

  // that anomalous behaviour. The important thing I'm preserving is that

  // leaf boxes continue to receive events in the foreground layer.

  DisplayBorderBackgroundOutline(aBuilder, aLists);

  if (!aBuilder->IsForEventDelivery() || !IsVisibleForPainting(aBuilder))

    return;

  aLists.Content()->AppendToTop(

    MakeDisplayItem<nsDisplayEventReceiver>(aBuilder, this));

}

/* virtual */ nscoord

nsLeafBoxFrame::GetMinISize(gfxContext *aRenderingContext)

{

  nscoord result;

  DISPLAY_MIN_INLINE_SIZE(this, result);

  nsBoxLayoutState state(PresContext(), aRenderingContext);

  WritingMode wm = GetWritingMode();

  LogicalSize minSize(wm, GetXULMinSize(state));

  // GetXULMinSize returns border-box size, and we want to return content

  // inline-size.  Since Reflow uses the reflow state's border and padding, we

  // actually just want to subtract what GetXULMinSize added, which is the

  // result of GetXULBorderAndPadding.

  nsMargin bp;

  GetXULBorderAndPadding(bp);

  result = minSize.ISize(wm) - LogicalMargin(wm, bp).IStartEnd(wm);

  return result;

}

/* virtual */ nscoord

nsLeafBoxFrame::GetPrefISize(gfxContext *aRenderingContext)

{

  nscoord result;

  DISPLAY_PREF_INLINE_SIZE(this, result);

  nsBoxLayoutState state(PresContext(), aRenderingContext);

  WritingMode wm = GetWritingMode();

  LogicalSize prefSize(wm, GetXULPrefSize(state));

  // GetXULPrefSize returns border-box size, and we want to return content

  // inline-size.  Since Reflow uses the reflow state's border and padding, we

  // actually just want to subtract what GetXULPrefSize added, which is the

  // result of GetXULBorderAndPadding.

  nsMargin bp;

  GetXULBorderAndPadding(bp);

  result = prefSize.ISize(wm) - LogicalMargin(wm, bp).IStartEnd(wm);

  return result;

}

nscoord

nsLeafBoxFrame::GetIntrinsicISize()

{

  // No intrinsic width

  return 0;

}

LogicalSize

nsLeafBoxFrame::ComputeAutoSize(gfxContext*         aRenderingContext,

                                WritingMode         aWM,

                                const LogicalSize&  aCBSize,

                                nscoord             aAvailableISize,

                                const LogicalSize&  aMargin,

                                const LogicalSize&  aBorder,

                                const LogicalSize&  aPadding,

                                ComputeSizeFlags    aFlags)

{

  // Important: NOT calling our direct superclass here!

  return nsFrame::ComputeAutoSize(aRenderingContext, aWM,

                                  aCBSize, aAvailableISize,

                                  aMargin, aBorder, aPadding, aFlags);

}

void

nsLeafBoxFrame::Reflow(nsPresContext*   aPresContext,

                     ReflowOutput&     aDesiredSize,

                     const ReflowInput& aReflowInput,

                     nsReflowStatus&          aStatus)

{

  // This is mostly a copy of nsBoxFrame::Reflow().

  // We aren't able to share an implementation because of the frame

  // class hierarchy.  If you make changes here, please keep

  // nsBoxFrame::Reflow in sync.

  MarkInReflow();

  DO_GLOBAL_REFLOW_COUNT("nsLeafBoxFrame");

  DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);

  MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");

  NS_ASSERTION(aReflowInput.ComputedWidth() >=0 &&

               aReflowInput.ComputedHeight() >= 0, "Computed Size < 0");

#ifdef DO_NOISY_REFLOW

  printf("\n-------------Starting LeafBoxFrame Reflow ----------------------------\n");

  printf("%p ** nsLBF::Reflow %d R: ", this, myCounter++);

  switch (aReflowInput.reason) {

    case eReflowReason_Initial:

      printf("Ini");break;

    case eReflowReason_Incremental:

      printf("Inc");break;

    case eReflowReason_Resize:

      printf("Rsz");break;

    case eReflowReason_StyleChange:

      printf("Sty");break;

    case eReflowReason_Dirty:

      printf("Drt ");

      break;

    default:printf("<unknown>%d", aReflowInput.reason);break;

  }

  printSize("AW", aReflowInput.AvailableWidth());

  printSize("AH", aReflowInput.AvailableHeight());

  printSize("CW", aReflowInput.ComputedWidth());

  printSize("CH", aReflowInput.ComputedHeight());

  printf(" *\n");

#endif

  // create the layout state

  nsBoxLayoutState state(aPresContext, aReflowInput.mRenderingContext);

  nsSize computedSize(aReflowInput.ComputedWidth(),aReflowInput.ComputedHeight());

  nsMargin m;

  m = aReflowInput.ComputedPhysicalBorderPadding();

  //GetXULBorderAndPadding(m);

  // this happens sometimes. So lets handle it gracefully.

  if (aReflowInput.ComputedHeight() == 0) {

    nsSize minSize = GetXULMinSize(state);

    computedSize.height = minSize.height - m.top - m.bottom;

  }

  nsSize prefSize(0,0);

  // if we are told to layout intrinic then get our preferred size.

  if (computedSize.width == NS_INTRINSICSIZE || computedSize.height == NS_INTRINSICSIZE) {

     prefSize = GetXULPrefSize(state);

     nsSize minSize = GetXULMinSize(state);

     nsSize maxSize = GetXULMaxSize(state);

     prefSize = BoundsCheck(minSize, prefSize, maxSize);

  }

  // get our desiredSize

  if (aReflowInput.ComputedWidth() == NS_INTRINSICSIZE) {

    computedSize.width = prefSize.width;

  } else {

    computedSize.width += m.left + m.right;

  }

  if (aReflowInput.ComputedHeight() == NS_INTRINSICSIZE) {

    computedSize.height = prefSize.height;

  } else {

    computedSize.height += m.top + m.bottom;

  }

  // handle reflow state min and max sizes

  // XXXbz the width handling here seems to be wrong, since

  // mComputedMin/MaxWidth is a content-box size, whole

  // computedSize.width is a border-box size...

  if (computedSize.width > aReflowInput.ComputedMaxWidth())

    computedSize.width = aReflowInput.ComputedMaxWidth();

  if (computedSize.width < aReflowInput.ComputedMinWidth())

    computedSize.width = aReflowInput.ComputedMinWidth();

  // Now adjust computedSize.height for our min and max computed

  // height.  The only problem is that those are content-box sizes,

  // while computedSize.height is a border-box size.  So subtract off

  // m.TopBottom() before adjusting, then readd it.

  computedSize.height = std::max(0, computedSize.height - m.TopBottom());

  computedSize.height = NS_CSS_MINMAX(computedSize.height,

                                      aReflowInput.ComputedMinHeight(),

                                      aReflowInput.ComputedMaxHeight());

  computedSize.height += m.TopBottom();

  nsRect r(mRect.x, mRect.y, computedSize.width, computedSize.height);

  SetXULBounds(state, r);

  // layout our children

  XULLayout(state);

  // ok our child could have gotten bigger. So lets get its bounds

  aDesiredSize.Width() = mRect.width;

  aDesiredSize.Height() = mRect.height;

  aDesiredSize.SetBlockStartAscent(GetXULBoxAscent(state));

  // the overflow rect is set in SetXULBounds() above

  aDesiredSize.mOverflowAreas = GetOverflowAreas();

#ifdef DO_NOISY_REFLOW

  {

    printf("%p ** nsLBF(done) W:%d H:%d  ", this, aDesiredSize.Width(), aDesiredSize.Height());

    if (maxElementWidth) {

      printf("MW:%d\n", *maxElementWidth);

    } else {

      printf("MW:?\n");

    }

  }

#endif

}

#ifdef DEBUG_FRAME_DUMP

nsresult

nsLeafBoxFrame::GetFrameName(nsAString& aResult) const

{

  return MakeFrameName(NS_LITERAL_STRING("LeafBox"), aResult);

}

#endif

nsresult

nsLeafBoxFrame::CharacterDataChanged(const CharacterDataChangeInfo& aInfo)

{

  MarkIntrinsicISizesDirty();

  return nsLeafFrame::CharacterDataChanged(aInfo);

}

/* virtual */ nsSize

nsLeafBoxFrame::GetXULPrefSize(nsBoxLayoutState& aState)

{

    return nsBox::GetXULPrefSize(aState);

}

/* virtual */ nsSize

nsLeafBoxFrame::GetXULMinSize(nsBoxLayoutState& aState)

{

    return nsBox::GetXULMinSize(aState);

}

/* virtual */ nsSize

nsLeafBoxFrame::GetXULMaxSize(nsBoxLayoutState& aState)

{

    return nsBox::GetXULMaxSize(aState);

}

/* virtual */ nscoord

nsLeafBoxFrame::GetXULFlex()

{

    return nsBox::GetXULFlex();

}

/* virtual */ nscoord

nsLeafBoxFrame::GetXULBoxAscent(nsBoxLayoutState& aState)

{

    return nsBox::GetXULBoxAscent(aState);

}

/* virtual */ void

nsLeafBoxFrame::MarkIntrinsicISizesDirty()

{

  // Don't call base class method, since everything it does is within an

  // IsXULBoxWrapped check.

}

NS_IMETHODIMP

nsLeafBoxFrame::DoXULLayout(nsBoxLayoutState& aState)

{

    return nsBox::DoXULLayout(aState);

}