/*

 * Copyright (C) 2008 Emweb bv, Herent, Belgium.

 *

 * See the LICENSE file for terms of use.

 */

#include "Wt/WWidgetItem.h"

#include "Wt/WContainerWidget.h"

#include "Wt/WException.h"

#include "Wt/WLayout.h"

#include "Wt/WLayoutItemImpl.h"

#include "StdWidgetItemImpl.h"

#include "FlexLayoutImpl.h"

#include "FlexItemImpl.h"

namespace Wt {

WWidgetItem::WWidgetItem(std::unique_ptr<WWidget> widget)

  : widget_(std::move(widget)),

    parentLayout_(nullptr)

{ }

WWidgetItem::~WWidgetItem()

{

  setParentWidget(nullptr);

}

WWidgetItem *WWidgetItem::findWidgetItem(WWidget *widget)

{

  if (widget_.get() == widget)

    return this;

  else

    return nullptr;

}

void WWidgetItem::setParentWidget(WWidget *parent)

{

  if (!widget_)

    return;

  if (parent) {

    WContainerWidget *pc = dynamic_cast<WContainerWidget *>(parent);

    if (widget_->parent()) {

      if (widget_->parent() != pc)

        throw WException("Cannot move a WWidgetItem to another container");

    } else

      pc->widgetAdded(widget_.get());

    bool flexLayout = parentLayout_->implementationIsFlexLayout();

    if (flexLayout)

      impl_ = std::make_unique<FlexItemImpl>(this);

    else

      impl_ = std::make_unique<StdWidgetItemImpl>(this);

  } else {

    WContainerWidget *pc = dynamic_cast<WContainerWidget *>(widget_->parent());

    if (pc) {

      assert(impl_);

      bool flex = dynamic_cast<FlexItemImpl*>(impl());

      pc->widgetRemoved(widget_.get(), flex);

    }

    impl_.reset();

  }

}

std::unique_ptr<WWidget> WWidgetItem::takeWidget()

{

  std::unique_ptr<WWidget> result = std::move(widget_);

  impl_.reset();

  return result;

}

void WWidgetItem::setParentLayout(WLayout *parentLayout)

{

  parentLayout_ = parentLayout;

}

void WWidgetItem::iterateWidgets(const HandleWidgetMethod& method) const

{

  if (widget_)

#ifndef WT_TARGET_JAVA

    method(widget_.get());

#else

    method.handle(widget_.get());

#endif

}

WWidget *WWidgetItem::parentWidget() const

{

  if (parentLayout_)

    return parentLayout_->parentWidget();

  else

    return nullptr;

}

}