/* -*- 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 https://mozilla.org/MPL/2.0/. */

#include "ColumnSetWrapperFrame.h"

using namespace mozilla;

nsBlockFrame*

NS_NewColumnSetWrapperFrame(nsIPresShell* aPresShell,

                            ComputedStyle* aStyle,

                            nsFrameState aStateFlags)

{

  ColumnSetWrapperFrame* frame = new (aPresShell) ColumnSetWrapperFrame(aStyle);

  // CSS Multi-column level 1 section 2: A multi-column container

  // establishes a new block formatting context, as per CSS 2.1 section

  // 9.4.1.

  frame->AddStateBits(aStateFlags | NS_BLOCK_FORMATTING_CONTEXT_STATE_BITS);

  return frame;

}

NS_IMPL_FRAMEARENA_HELPERS(ColumnSetWrapperFrame)

NS_QUERYFRAME_HEAD(ColumnSetWrapperFrame)

  NS_QUERYFRAME_ENTRY(ColumnSetWrapperFrame)

NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)

ColumnSetWrapperFrame::ColumnSetWrapperFrame(ComputedStyle* aStyle)

  : nsBlockFrame(aStyle, kClassID)

{

}

#ifdef DEBUG_FRAME_DUMP

nsresult

ColumnSetWrapperFrame::GetFrameName(nsAString& aResult) const

{

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

}

#endif

// Disallow any append, insert, or remove operations after building the

// column hierarchy since any change to the column hierarchy in the column

// sub-tree need to be re-created.

void

ColumnSetWrapperFrame::AppendFrames(ChildListID aListID,

                                    nsFrameList& aFrameList)

{

  MOZ_ASSERT_UNREACHABLE("Unsupported operation!");

  nsBlockFrame::AppendFrames(aListID, aFrameList);

}

void

ColumnSetWrapperFrame::InsertFrames(ChildListID aListID,

                                    nsIFrame* aPrevFrame,

                                    nsFrameList& aFrameList)

{

  MOZ_ASSERT_UNREACHABLE("Unsupported operation!");

  nsBlockFrame::InsertFrames(aListID, aPrevFrame, aFrameList);

}

void

ColumnSetWrapperFrame::RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame)

{

  MOZ_ASSERT_UNREACHABLE("Unsupported operation!");

  nsBlockFrame::RemoveFrame(aListID, aOldFrame);

}