/* -*- 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/. */

#ifndef nsFileControlFrame_h___

#define nsFileControlFrame_h___

#include "mozilla/Attributes.h"

#include "nsBlockFrame.h"

#include "nsIFormControlFrame.h"

#include "nsIDOMEventListener.h"

#include "nsIAnonymousContentCreator.h"

#include "nsCOMPtr.h"

namespace mozilla {

namespace dom {

class FileList;

class BlobImpl;

class DataTransfer;

} // namespace dom

} // namespace mozilla

class nsFileControlFrame final : public nsBlockFrame,

                                 public nsIFormControlFrame,

                                 public nsIAnonymousContentCreator

{

public:

  explicit nsFileControlFrame(ComputedStyle* aStyle);

  virtual void Init(nsIContent*       aContent,

                    nsContainerFrame* aParent,

                    nsIFrame*         aPrevInFlow) override;

  virtual void BuildDisplayList(nsDisplayListBuilder*   aBuilder,

                                const nsDisplayListSet& aLists) override;

  NS_DECL_QUERYFRAME

  NS_DECL_FRAMEARENA_HELPERS(nsFileControlFrame)

  // nsIFormControlFrame

  virtual nsresult SetFormProperty(nsAtom* aName, const nsAString& aValue) override;

  virtual void SetFocus(bool aOn, bool aRepaint) override;

  virtual nscoord GetMinISize(gfxContext *aRenderingContext) override;

  virtual void DestroyFrom(nsIFrame* aDestructRoot, PostDestroyData& aPostDestroyData) override;

#ifdef DEBUG_FRAME_DUMP

  virtual nsresult GetFrameName(nsAString& aResult) const override;

#endif

  virtual nsresult AttributeChanged(int32_t         aNameSpaceID,

                                    nsAtom*        aAttribute,

                                    int32_t         aModType) override;

  virtual void ContentStatesChanged(mozilla::EventStates aStates) override;

  // nsIAnonymousContentCreator

  virtual nsresult CreateAnonymousContent(nsTArray<ContentInfo>& aElements) override;

  virtual void AppendAnonymousContentTo(nsTArray<nsIContent*>& aElements,

                                        uint32_t aFilter) override;

#ifdef ACCESSIBILITY

  virtual mozilla::a11y::AccType AccessibleType() override;

#endif

  typedef bool (*AcceptAttrCallback)(const nsAString&, void*);

protected:

  class MouseListener;

  friend class MouseListener;

  class MouseListener : public nsIDOMEventListener {

  public:

    NS_DECL_ISUPPORTS

    explicit MouseListener(nsFileControlFrame* aFrame)

     : mFrame(aFrame)

    {}

    void ForgetFrame() {

      mFrame = nullptr;

    }

  protected:

    virtual ~MouseListener() {}

    nsFileControlFrame* mFrame;

  };

  class SyncDisabledStateEvent;

  friend class SyncDisabledStateEvent;

  class SyncDisabledStateEvent : public mozilla::Runnable

  {

  public:

    explicit SyncDisabledStateEvent(nsFileControlFrame* aFrame)

      : mozilla::Runnable("nsFileControlFrame::SyncDisabledStateEvent")

      , mFrame(aFrame)

    {}

    NS_IMETHOD Run() override {

      nsFileControlFrame* frame = static_cast<nsFileControlFrame*>(mFrame.GetFrame());

      NS_ENSURE_STATE(frame);

      frame->SyncDisabledState();

      return NS_OK;

    }

  private:

    WeakFrame mFrame;

  };

  class DnDListener: public MouseListener {

  public:

    explicit DnDListener(nsFileControlFrame* aFrame)

      : MouseListener(aFrame)

    {}

    NS_DECL_NSIDOMEVENTLISTENER

    nsresult GetBlobImplForWebkitDirectory(mozilla::dom::FileList* aFileList,

                                           mozilla::dom::BlobImpl** aBlobImpl);

    bool IsValidDropData(mozilla::dom::DataTransfer* aDataTransfer);

    bool CanDropTheseFiles(mozilla::dom::DataTransfer* aDataTransfer,

                           bool aSupportsMultiple);

  };

  virtual bool IsFrameOfType(uint32_t aFlags) const override

  {

    return nsBlockFrame::IsFrameOfType(aFlags &

      ~(nsIFrame::eReplaced | nsIFrame::eReplacedContainsBlock));

  }

  /**

   * The text box input.

   * @see nsFileControlFrame::CreateAnonymousContent

   */

  RefPtr<Element> mTextContent;

  /**

   * The button to open a file or directory picker.

   * @see nsFileControlFrame::CreateAnonymousContent

   */

  RefPtr<Element> mBrowseFilesOrDirs;

  /**

   * Drag and drop mouse listener.

   * This makes sure we don't get used after destruction.

   */

  RefPtr<DnDListener> mMouseListener;

protected:

  /**

   * Sync the disabled state of the content with anonymous children.

   */

  void SyncDisabledState();

  /**

   * Updates the displayed value by using aValue.

   */

  void UpdateDisplayedValue(const nsAString& aValue, bool aNotify);

};

#endif // nsFileControlFrame_h___