pjs/layout/forms/nsFileControlFrame.h

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#ifndef nsFileControlFrame_h___
#define nsFileControlFrame_h___

#include "nsAreaFrame.h"
#include "nsIFormControlFrame.h"
#include "nsIDOMMouseListener.h"
#include "nsIAnonymousContentCreator.h"
#include "nsCOMPtr.h"

#include "nsTextControlFrame.h"
typedef   nsTextControlFrame nsNewFrame;

class nsISupportsArray;

class nsFileControlFrame : public nsAreaFrame,
                           public nsIFormControlFrame,
                           public nsIDOMMouseListener,
                           public nsIAnonymousContentCreator
{
public:
  nsFileControlFrame(nsStyleContext* aContext);
  virtual ~nsFileControlFrame();

  NS_IMETHOD BuildDisplayList(nsDisplayListBuilder*   aBuilder,
                              const nsRect&           aDirtyRect,
                              const nsDisplayListSet& aLists);

  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
  
  // nsIFormControlFrame
  virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);
  virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const;
  virtual void SetFocus(PRBool aOn, PRBool aRepaint);

  NS_IMETHOD Reflow(nsPresContext*          aCX,
                    nsHTMLReflowMetrics&     aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus&          aStatus);

  virtual void Destroy();

#ifdef NS_DEBUG
  NS_IMETHOD GetFrameName(nsAString& aResult) const;
#endif

  NS_IMETHOD AttributeChanged(PRInt32         aNameSpaceID,
                              nsIAtom*        aAttribute,
                              PRInt32         aModType);
  virtual PRBool IsLeaf() const;



  // from nsIAnonymousContentCreator
  NS_IMETHOD CreateAnonymousContent(nsPresContext* aPresContext,
                                    nsISupportsArray& aChildList);
  NS_IMETHOD CreateFrameFor(nsPresContext*   aPresContext,
                            nsIContent *      aContent,
                            nsIFrame**        aFrame) { if (aFrame) *aFrame = nsnull; return NS_ERROR_FAILURE; }


  // mouse events when out browse button is pressed
  /**
  * Processes a mouse down event
  * @param aMouseEvent @see nsIDOMEvent.h 
  * @returns whether the event was consumed or ignored. @see nsresult
  */
  NS_IMETHOD MouseDown(nsIDOMEvent* aMouseEvent) { return NS_OK; }

  /**
   * Processes a mouse up event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   */
  NS_IMETHOD MouseUp(nsIDOMEvent* aMouseEvent) { return NS_OK; }

  /**
   * Processes a mouse click event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   *
   */
  NS_IMETHOD MouseClick(nsIDOMEvent* aMouseEvent); // we only care when the button is clicked

  /**
   * Processes a mouse click event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   *
   */
  NS_IMETHOD MouseDblClick(nsIDOMEvent* aMouseEvent) { return NS_OK; }

  /**
   * Processes a mouse enter event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   */
  NS_IMETHOD MouseOver(nsIDOMEvent* aMouseEvent) { return NS_OK; }

  /**
   * Processes a mouse leave event
   * @param aMouseEvent @see nsIDOMEvent.h 
   * @returns whether the event was consumed or ignored. @see nsresult
   */
  NS_IMETHOD MouseOut(nsIDOMEvent* aMouseEvent) { return NS_OK; }

  NS_IMETHOD HandleEvent(nsIDOMEvent* aEvent) { return NS_OK; }

protected:
  virtual PRIntn GetSkipSides() const;

  /**
   * The text frame (populated on initial reflow).
   * @see nsFileControlFrame::Reflow
   */
  nsNewFrame* mTextFrame;
  /**
   * The text box input.
   * @see nsFileControlFrame::CreateAnonymousContent
   */
  nsCOMPtr<nsIContent> mTextContent;
  /**
   * The browse button input.
   * @see nsFileControlFrame::CreateAnonymousContent
   */
  nsCOMPtr<nsIContent> mBrowse;
  /**
   * The current value, stored during those rare in-between periods where the
   * file frame is there but the input frame is not.
   */
  nsString*           mCachedState;

private:
  /**
   * Find the first text frame child (first frame child whose content has input
   * type=text) of a frame.
   * XXX this is an awfully complicated implementation of something we could
   * likely do by just doing GetPrimaryFrame on mTextContent
   *
   * @param aPresContext the current pres context
   * @param aStart the parent frame to search children of
   * @return the text control frame, or null if not found
   */
  nsNewFrame* GetTextControlFrame(nsPresContext* aPresContext,
                                  nsIFrame* aStart);

  /**
   * Copy an attribute from file content to text and button content.
   * @param aNameSpaceID namespace of attr
   * @param aAttribute attribute atom
   * @param aWhichControls which controls to apply to (SYNC_TEXT or SYNC_FILE
   *        or SYNC_BOTH)
   */
  void SyncAttr(PRInt32 aNameSpaceID, nsIAtom* aAttribute,
                PRBool aWhichControls);

  NS_IMETHOD_(nsrefcnt) AddRef() { return 1; }
  NS_IMETHOD_(nsrefcnt) Release() { return 1; }
};

#endif