pjs/layout/forms/nsFormControlFrame.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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#ifndef nsFormControlFrame_h___
#define nsFormControlFrame_h___

#include "nsIFormControlFrame.h"
#include "nsLeafFrame.h"

#define CSS_NOTSET -1
#define ATTR_NOTSET -1

#ifdef DEBUG_rods

#define COMPARE_QUIRK_SIZE(__class, __navWidth, __navHeight) \
{ \
  float t2p;                                            \
  t2p = aPresContext->TwipsToPixels();                  \
  printf ("%-25s::Size=%4d,%4d %3d,%3d Nav:%3d,%3d Diffs: %3d,%3d\n",  \
           (__class),                                   \
           aDesiredSize.width, aDesiredSize.height,     \
           NSToCoordRound(aDesiredSize.width * t2p),    \
           NSToCoordRound(aDesiredSize.height * t2p),   \
           (__navWidth),                                \
           (__navHeight),                               \
           NSToCoordRound(aDesiredSize.width * t2p) - (__navWidth),   \
           NSToCoordRound(aDesiredSize.height * t2p) - (__navHeight)); \
}

#else
#define COMPARE_QUIRK_SIZE(__class, __navWidth, __navHeight)
#endif

/** 
  * nsFormControlFrame is the base class for frames of form controls. It
  * provides a uniform way of creating widgets, resizing, and painting.
  * @see nsLeafFrame and its base classes for more info
  */
class nsFormControlFrame : public nsLeafFrame,
                           public nsIFormControlFrame
{

public:
  /**
    * Main constructor
    * @param aContent the content representing this frame
    * @param aParentFrame the parent frame
    */
  nsFormControlFrame(nsStyleContext*);

  NS_IMETHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);

  /** 
    * Respond to a gui event
    * @see nsIFrame::HandleEvent
    */
  NS_IMETHOD HandleEvent(nsPresContext* aPresContext, 
                         nsGUIEvent* aEvent,
                         nsEventStatus* aEventStatus);

  NS_IMETHOD SetInitialChildList(nsIAtom*        aListName,
                                 nsIFrame*       aChildList);

  NS_IMETHOD DidReflow(nsPresContext*           aPresContext,
                       const nsHTMLReflowState*  aReflowState,
                       nsDidReflowStatus         aStatus);

  /**
    * Respond to the request to resize and/or reflow
    * @see nsIFrame::Reflow
    */
  NS_IMETHOD Reflow(nsPresContext*      aCX,
                    nsHTMLReflowMetrics& aDesiredSize,
                    const nsHTMLReflowState& aReflowState,
                    nsReflowStatus&      aStatus);

  virtual void Destroy();

  // new behavior

  virtual void SetFocus(PRBool aOn = PR_TRUE, PRBool aRepaint = PR_FALSE);

   /**
    * Get the width and height of this control based on CSS 
    * @param aPresContext the presentation context
    * @param aSize the size that this frame wants, set by this method. values of -1 
    * for aSize.width or aSize.height indicate unset values.
    */
  static void GetStyleSize(nsPresContext* aContext,
                            const nsHTMLReflowState& aReflowState,
                            nsSize& aSize);

  // nsIFormControlFrame
  virtual nsresult SetFormProperty(nsIAtom* aName, const nsAString& aValue);

  virtual nsresult GetFormProperty(nsIAtom* aName, nsAString& aValue) const; 
  
  // Resize Reflow Optimization Methods
  static void SetupCachedSizes(nsSize& aCacheSize,
                               nscoord& aCachedAscent,
                               nscoord& aCachedMaxElementWidth,
                               nsHTMLReflowMetrics& aDesiredSize);

  static void SkipResizeReflow(nsSize& aCacheSize,
                               nscoord& aCachedAscent,
                               nscoord& aCachedMaxElementWidth,
                               nsSize& aCachedAvailableSize,
                               nsHTMLReflowMetrics& aDesiredSize,
                               const nsHTMLReflowState& aReflowState,
                               nsReflowStatus& aStatus,
                               PRBool& aBailOnWidth,
                               PRBool& aBailOnHeight);
  // AccessKey Helper function
  static nsresult RegUnRegAccessKey(nsIFrame * aFrame, PRBool aDoReg);

  /**
   * Helper routine to that returns the height of the screen
   *
   */
  static nsresult GetScreenHeight(nsPresContext* aPresContext, nscoord& aHeight);

  /**
   * Helper method to get the absolute position of a frame
   *
   */
  static nsresult GetAbsoluteFramePosition(nsPresContext* aPresContext,
                                           nsIFrame *aFrame, 
                                           nsRect& aAbsoluteTwipsRect, 
                                           nsRect& aAbsolutePixelRect);
protected:

  virtual ~nsFormControlFrame();

  /** 
    * Get the size that this frame would occupy without any constraints
    * @param aPresContext the presentation context
    * @param aDesiredSize the size desired by this frame, to be set by this method
    * @param aMaxSize the maximum size available for this frame
    */
  virtual void GetDesiredSize(nsPresContext* aPresContext,
                              const nsHTMLReflowState& aReflowState,
                              nsHTMLReflowMetrics& aDesiredSize);

//
//-------------------------------------------------------------------------------------
//  Utility methods for managing checkboxes and radiobuttons
//-------------------------------------------------------------------------------------
//   
   /**
    * Get the state of the checked attribute.
    * @param aState set to PR_TRUE if the checked attribute is set,
    * PR_FALSE if the checked attribute has been removed
    */

  void GetCurrentCheckState(PRBool* aState);

  PRBool       mDidInit;

private:
  NS_IMETHOD_(nsrefcnt) AddRef() { return NS_OK; }
  NS_IMETHOD_(nsrefcnt) Release() { return NS_OK; }

};

#endif