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tkMacButton.c

/* 
 * tkMacButton.c --
 *
 *    This file implements the Macintosh specific portion of the
 *    button widgets.
 *
 * Copyright (c) 1996-1997 by Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tkMacButton.c,v 1.3 1998/09/14 18:23:34 stanton Exp $
 */

#include "tkButton.h"
#include "tkMacInt.h"
#include <Controls.h>
#include <LowMem.h>
#include <Appearance.h>


#include <ToolUtils.h>

/*
 * Some defines used to control what type of control is drawn.
 */

#define DRAW_LABEL      0           /* Labels are treated genericly. */
#define DRAW_CONTROL    1           /* Draw using the Native control. */
#define DRAW_CUSTOM     2           /* Make our own button drawing. */
#define DRAW_BEVEL      3

/*
 * The following structures are used to draw our controls.  Rather than
 * having many Mac controls we just use one control of each type and
 * reuse them for all Tk widgets.  When the windowRef variable is NULL
 * it means none of the data structures have been allocated.
 */

static WindowRef windowRef = NULL;
static CWindowRecord windowRecord;
static ControlRef buttonHandle;
static ControlRef checkHandle;
static ControlRef radioHandle;
static ControlRef smallBevelHandle;
static ControlRef smallStickyBevelHandle;
static ControlRef medBevelHandle;
static ControlRef medStickyBevelHandle;
static ControlRef largeBevelHandle;
static ControlRef largeStickyBevelHandle;

/*
 * These are used to store the image content for
 * beveled buttons - i.e. buttons with images.
 */
 
static ControlButtonContentInfo bevelButtonContent;
static OpenCPicParams picParams;

static CCTabHandle buttonTabHandle;
static CCTabHandle checkTabHandle;
static CCTabHandle radioTabHandle;
static PixMapHandle oldPixPtr;

/*
 * These functions are used when Appearance is present.
 * By embedding all our controls in a userPane control,
 * we can color the background of the text in radiobuttons
 * and checkbuttons.  Thanks to Peter Gontier of Apple DTS
 * for help on this one.
 */

static ControlRef userPaneHandle;
static RGBColor gUserPaneBackground = { ~0, ~0, ~0};
static pascal OSErr SetUserPaneDrawProc(ControlRef control,
      ControlUserPaneDrawProcPtr upp);
static pascal OSErr SetUserPaneSetUpSpecialBackgroundProc(ControlRef control,
      ControlUserPaneBackgroundProcPtr upp);
static pascal void UserPaneDraw(ControlRef control, ControlPartCode cpc);
static pascal void UserPaneBackgroundProc(ControlHandle,
      ControlBackgroundPtr info);

/*
 * Forward declarations for procedures defined later in this file:
 */

static int  UpdateControlColors _ANSI_ARGS_((TkButton *butPtr,
                      ControlRef controlHandle, CCTabHandle ccTabHandle,
                      RGBColor *saveColorPtr));
static void DrawBufferedControl _ANSI_ARGS_((TkButton *butPtr,
                GWorldPtr destPort, GC gc, Pixmap pixmap));
static void InitSampleControls();
static void SetupBevelButton _ANSI_ARGS_((TkButton *butPtr,
                ControlRef controlHandle, 
                GWorldPtr destPort, GC gc, Pixmap pixmap));
static void ChangeBackgroundWindowColor _ANSI_ARGS_((
                      WindowRef macintoshWindow, RGBColor rgbColor,
                      RGBColor *oldColor));
static void ButtonExitProc _ANSI_ARGS_((ClientData clientData));

/*
 * The class procedure table for the button widgets.
 */

TkClassProcs tkpButtonProcs = { 
    NULL,               /* createProc. */
    TkButtonWorldChanged,     /* geometryProc. */
    NULL                /* modalProc. */
};

/*
 *----------------------------------------------------------------------
 *
 * TkpCreateButton --
 *
 *    Allocate a new TkButton structure.
 *
 * Results:
 *    Returns a newly allocated TkButton structure.
 *
 * Side effects:
 *    Registers an event handler for the widget.
 *
 *----------------------------------------------------------------------
 */

TkButton *
TkpCreateButton(
    Tk_Window tkwin)
{
    return (TkButton *) ckalloc(sizeof(TkButton));
}

/*
 *----------------------------------------------------------------------
 *
 * TkpDisplayButton --
 *
 *    This procedure is invoked to display a button widget.  It is
 *    normally invoked as an idle handler.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    Commands are output to X to display the button in its
 *    current mode.  The REDRAW_PENDING flag is cleared.
 *
 *----------------------------------------------------------------------
 */

void
TkpDisplayButton(
    ClientData clientData)    /* Information about widget. */
{
    TkButton *butPtr = (TkButton *) clientData;
    Pixmap pixmap;
    GC gc;
    Tk_3DBorder border;
    int x = 0;                /* Initialization only needed to stop
                         * compiler warning. */
    int y, relief;
    register Tk_Window tkwin = butPtr->tkwin;
    int width, height;
    int offset;               /* 0 means this is a normal widget.  1 means
                         * it is an image button, so we offset the
                         * image to make the button appear to move
                         * up and down as the relief changes. */
    int hasImageOrBitmap;
    CGrafPtr saveWorld;
    GDHandle saveDevice;
    GWorldPtr destPort;
    int drawType, borderWidth;
    
    GetGWorld(&saveWorld, &saveDevice);

    butPtr->flags &= ~REDRAW_PENDING;
    if ((butPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
      return;
    }

    /*
     * In order to avoid screen flashes, this procedure redraws
     * the button in a pixmap, then copies the pixmap to the
     * screen in a single operation.  This means that there's no
     * point in time where the on-sreen image has been cleared.
     */

    pixmap = Tk_GetPixmap(butPtr->display, Tk_WindowId(tkwin),
          Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));

    hasImageOrBitmap = ((butPtr->image != NULL) || (butPtr->bitmap != None));
    offset = (butPtr->type == TYPE_BUTTON) && hasImageOrBitmap;

    border = butPtr->normalBorder;
    if ((butPtr->state == tkDisabledUid) && (butPtr->disabledFg != NULL)) {
      gc = butPtr->disabledGC;
    } else if ((butPtr->type == TYPE_BUTTON)
          && (butPtr->state == tkActiveUid)) {
      gc = butPtr->activeTextGC;
      border = butPtr->activeBorder;
    } else {
      gc = butPtr->normalTextGC;
    }
    
    if ((butPtr->flags & SELECTED) && (butPtr->state != tkActiveUid)
          && (butPtr->selectBorder != NULL) && !butPtr->indicatorOn) {
      border = butPtr->selectBorder;
    }

    /*
     * Override the relief specified for the button if this is a
     * checkbutton or radiobutton and there's no indicator.
     * However, don't do this in the presence of Appearance, since
     * then the bevel button will take care of the relief.
     */

    relief = butPtr->relief;

    if ((butPtr->type >= TYPE_CHECK_BUTTON) && !butPtr->indicatorOn) { 
        if (!TkMacHaveAppearance() || !hasImageOrBitmap) {
          relief = (butPtr->flags & SELECTED) ? TK_RELIEF_SUNKEN
                : TK_RELIEF_RAISED;
        }
    }

    /*
     * See the comment in UpdateControlColors as to why we use the 
     * highlightbackground for the border of Macintosh buttons.
     */
     
    if (butPtr->type == TYPE_BUTTON) {
        Tk_Fill3DRectangle(tkwin, pixmap, butPtr->highlightBorder, 0, 0,
              Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
    } else {
    Tk_Fill3DRectangle(tkwin, pixmap, butPtr->normalBorder, 0, 0,
          Tk_Width(tkwin), Tk_Height(tkwin), 0, TK_RELIEF_FLAT);
    }
   
    if (butPtr->type == TYPE_LABEL) {
      drawType = DRAW_LABEL;
    } else if (butPtr->type == TYPE_BUTTON) {
      if (!hasImageOrBitmap) {
          drawType = DRAW_CONTROL;
      } else if (butPtr->image != None) {
          drawType = DRAW_BEVEL;
      } else {
          /*
           * TO DO - The current way the we draw bitmaps (XCopyPlane)
           * uses CopyDeepMask in this one case.  The Picture recording 
           * does not record this call, and so we can't use the
           * Appearance bevel button here.  The only case that would
           * exercise this is if you use a bitmap, with
           * -data & -mask specified.  We should probably draw the 
           * appearance button and overprint the image in this case.
           * This just punts and draws the old-style, ugly, button.
           */
           
          if (gc->clip_mask == 0) {
              drawType = DRAW_BEVEL;
          } else {
              TkpClipMask *clipPtr = (TkpClipMask*) gc->clip_mask;
              if ((clipPtr->type == TKP_CLIP_PIXMAP) &&
                  (clipPtr->value.pixmap != butPtr->bitmap)) {
                  drawType = DRAW_CUSTOM;
              } else {
                  drawType = DRAW_BEVEL;
              }
          }
      }
    } else {
      if (butPtr->indicatorOn) {
          drawType = DRAW_CONTROL;
      } else if (hasImageOrBitmap) {
          if (gc->clip_mask == 0) {
              drawType = DRAW_BEVEL;
          } else {
              TkpClipMask *clipPtr = (TkpClipMask*) gc->clip_mask;
              if ((clipPtr->type == TKP_CLIP_PIXMAP) &&
                  (clipPtr->value.pixmap != butPtr->bitmap)) {
                  drawType = DRAW_CUSTOM;
              } else {
                  drawType = DRAW_BEVEL;
              }
          }
      } else {
          drawType = DRAW_CUSTOM;
      }
    }

    /*
     * Draw the native portion of the buttons.  Start by creating the control
     * if it doesn't already exist.  Then configure the Macintosh control from
     * the Tk info.  Finally, we call Draw1Control to draw to the screen.
     */

    if ((drawType == DRAW_CONTROL) || 
            ((drawType == DRAW_BEVEL) && TkMacHaveAppearance())) {
      borderWidth = 0;
      
      /*
       * This part uses Macintosh rather than Tk calls to draw
       * to the screen.  Make sure the ports etc. are set correctly.
       */
      
      destPort = TkMacGetDrawablePort(pixmap);
      SetGWorld(destPort, NULL);
      DrawBufferedControl(butPtr, destPort, gc, pixmap);
    }

    if ((drawType == DRAW_CUSTOM) || (drawType == DRAW_LABEL)) {
      borderWidth = butPtr->borderWidth;
    }

    /*
     * Display image or bitmap or text for button.  This has
     * already been done under Appearance with the Bevel
     * button types.
     */

    if ((drawType == DRAW_BEVEL) && TkMacHaveAppearance()) {
        /* Empty Body */
    } else if (butPtr->image != None) {
      Tk_SizeOfImage(butPtr->image, &width, &height);

      imageOrBitmap:
      TkComputeAnchor(butPtr->anchor, tkwin, 0, 0,
            butPtr->indicatorSpace + width, height, &x, &y);
      x += butPtr->indicatorSpace;

      x += offset;
      y += offset;
      if (relief == TK_RELIEF_RAISED) {
          x -= offset;
          y -= offset;
      } else if (relief == TK_RELIEF_SUNKEN) {
          x += offset;
          y += offset;
      }
      if (butPtr->image != NULL) {
          if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
            Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height,
                  pixmap, x, y);
          } else {
            Tk_RedrawImage(butPtr->image, 0, 0, width, height, pixmap,
                  x, y);
          }
      } else {
          XSetClipOrigin(butPtr->display, gc, x, y);
          XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc, 0, 0,
                (unsigned int) width, (unsigned int) height, x, y, 1);
          XSetClipOrigin(butPtr->display, gc, 0, 0);
      }
      y += height/2;
    } else if (butPtr->bitmap != None) {
      Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
      goto imageOrBitmap;
    } else {
      TkComputeAnchor(butPtr->anchor, tkwin, butPtr->padX, butPtr->padY,
            butPtr->indicatorSpace + butPtr->textWidth, butPtr->textHeight,
            &x, &y);

      x += butPtr->indicatorSpace;

      Tk_DrawTextLayout(butPtr->display, pixmap, gc, butPtr->textLayout,
            x, y, 0, -1);
      y += butPtr->textHeight/2;
    }

    /*
     * If the button is disabled with a stipple rather than a special
     * foreground color, generate the stippled effect.  If the widget
     * is selected and we use a different background color when selected,
     * must temporarily modify the GC.
     */

    if ((butPtr->state == tkDisabledUid)
          && ((butPtr->disabledFg == NULL) || (butPtr->image != NULL))) {
      if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
            && (butPtr->selectBorder != NULL)) {
          XSetForeground(butPtr->display, butPtr->disabledGC,
                Tk_3DBorderColor(butPtr->selectBorder)->pixel);
      }
      XFillRectangle(butPtr->display, pixmap, butPtr->disabledGC,
            butPtr->inset, butPtr->inset,
            (unsigned) (Tk_Width(tkwin) - 2*butPtr->inset),
            (unsigned) (Tk_Height(tkwin) - 2*butPtr->inset));
      if ((butPtr->flags & SELECTED) && !butPtr->indicatorOn
            && (butPtr->selectBorder != NULL)) {
          XSetForeground(butPtr->display, butPtr->disabledGC,
                Tk_3DBorderColor(butPtr->normalBorder)->pixel);
      }
    }

    /*
     * Draw the border and traversal highlight last.  This way, if the
     * button's contents overflow they'll be covered up by the border.
     */

    if (relief != TK_RELIEF_FLAT) {
      int inset = butPtr->highlightWidth;
      Tk_Draw3DRectangle(tkwin, pixmap, border, inset, inset,
            Tk_Width(tkwin) - 2*inset, Tk_Height(tkwin) - 2*inset,
            butPtr->borderWidth, relief);
    }

    /*
     * Copy the information from the off-screen pixmap onto the screen,
     * then delete the pixmap.
     */

    XCopyArea(butPtr->display, pixmap, Tk_WindowId(tkwin),
          butPtr->copyGC, 0, 0, (unsigned) Tk_Width(tkwin),
          (unsigned) Tk_Height(tkwin), 0, 0);
    Tk_FreePixmap(butPtr->display, pixmap);

    SetGWorld(saveWorld, saveDevice);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpComputeButtonGeometry --
 *
 *    After changes in a button's text or bitmap, this procedure
 *    recomputes the button's geometry and passes this information
 *    along to the geometry manager for the window.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    The button's window may change size.
 *
 *----------------------------------------------------------------------
 */

void
TkpComputeButtonGeometry(
    TkButton *butPtr)   /* Button whose geometry may have changed. */
{
    int width, height, avgWidth;
    Tk_FontMetrics fm;


    /*
     * First figure out the size of the contents of the button.
     */
     
    butPtr->indicatorSpace = 0;
    if (butPtr->image != NULL) {
      Tk_SizeOfImage(butPtr->image, &width, &height);
      imageOrBitmap:
      if (butPtr->width > 0) {
          width = butPtr->width;
      }
      if (butPtr->height > 0) {
          height = butPtr->height;
      }
      if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
          butPtr->indicatorSpace = height;
          if (butPtr->type == TYPE_CHECK_BUTTON) {
            butPtr->indicatorDiameter = (65*height)/100;
          } else {
            butPtr->indicatorDiameter = (75*height)/100;
          }
      }
    } else if (butPtr->bitmap != None) {
      Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, &width, &height);
      goto imageOrBitmap;
    } else {
      Tk_FreeTextLayout(butPtr->textLayout);
      butPtr->textLayout = Tk_ComputeTextLayout(butPtr->tkfont,
            butPtr->text, -1, butPtr->wrapLength,
            butPtr->justify, 0, &butPtr->textWidth, &butPtr->textHeight);

      width = butPtr->textWidth;
      height = butPtr->textHeight;
      avgWidth = Tk_TextWidth(butPtr->tkfont, "0", 1);
      Tk_GetFontMetrics(butPtr->tkfont, &fm);

      if (butPtr->width > 0) {
          width = butPtr->width * avgWidth;
      }
      if (butPtr->height > 0) {
          height = butPtr->height * fm.linespace;
      }
      if ((butPtr->type >= TYPE_CHECK_BUTTON) && butPtr->indicatorOn) {
          butPtr->indicatorDiameter = fm.linespace;
          if (butPtr->type == TYPE_CHECK_BUTTON) {
            butPtr->indicatorDiameter = (80*butPtr->indicatorDiameter)/100;
          }
          butPtr->indicatorSpace = butPtr->indicatorDiameter + avgWidth;
      }
    }

    /*
     * Now figure out the size of the border decorations for the button.
     */
     
    if (butPtr->highlightWidth < 0) {
      butPtr->highlightWidth = 0;
    }
    
    /*
     * The width and height calculation for Appearance buttons with images & 
     * non-Appearance buttons with images is different.  In the latter case, 
     * we add the borderwidth to the inset, since we are going to stamp a
     * 3-D border over the image.  In the former, we add it to the height,
     * directly, since Appearance will draw the border as part of our control.
     *
     * When issuing the geometry request, add extra space for the indicator,
     * if any, and for the border and padding, plus if this is an image two 
     * extra pixels so the display can be offset by 1 pixel in either
     * direction for the raised or lowered effect.
     *
     * The highlight width corresponds to the default ring on the Macintosh.
     * As such, the highlight width is only added if the button is the default
     * button.  The actual width of the default ring is one less than the
     * highlight width as there is also one pixel of spacing.
     * Appearance buttons with images do not have a highlight ring, because the 
     * Bevel button type does not support one.
     */

    if ((butPtr->image == None) && (butPtr->bitmap == None)) {
      width += 2*butPtr->padX;
      height += 2*butPtr->padY;
    }
    
    if ((butPtr->type == TYPE_BUTTON)) {
        if ((butPtr->image == None) && (butPtr->bitmap == None)) {
          butPtr->inset = 0;
            if (butPtr->defaultState != tkDisabledUid) {
                butPtr->inset += butPtr->highlightWidth;
            }
        } else if (TkMacHaveAppearance()) {
                butPtr->inset = 0;
                width += (2 * butPtr->borderWidth + 4);
                height += (2 * butPtr->borderWidth + 4);
      } else {
            butPtr->inset = butPtr->borderWidth;
      width += 2;
      height += 2;
            if (butPtr->defaultState != tkDisabledUid) {
                butPtr->inset += butPtr->highlightWidth;
            }
        }
    } else if ((butPtr->type != TYPE_LABEL)) {
        if (butPtr->indicatorOn) {
          butPtr->inset = 0;
      } else {
      /*
       * Under Appearance, the Checkbutton or radiobutton with an image
       * is represented by a BevelButton with the Sticky defProc...  
       * So we must set its height in the same way as the Button 
       * with an image or bitmap.
       */
            if (((butPtr->image != None) || (butPtr->bitmap != None))
                    && TkMacHaveAppearance()) {
                int border;
                butPtr->inset = 0;
                if ( butPtr->borderWidth <= 2 ) {
                    border = 6;
                }  else {
                    border = 2 * butPtr->borderWidth + 2;
                }              
                width += border;
                height += border;
            } else {
              butPtr->inset = butPtr->borderWidth;
            }   
        }   
    } else {
      butPtr->inset = butPtr->borderWidth;
    }



    Tk_GeometryRequest(butPtr->tkwin, (int) (width + butPtr->indicatorSpace
          + 2*butPtr->inset), (int) (height + 2*butPtr->inset));
    Tk_SetInternalBorder(butPtr->tkwin, butPtr->inset);
}

/*
 *----------------------------------------------------------------------
 *
 * TkpDestroyButton --
 *
 *    Free data structures associated with the button control.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    Restores the default control state.
 *
 *----------------------------------------------------------------------
 */

void
TkpDestroyButton(
    TkButton *butPtr)
{
    /* Do nothing. */
}

/*
 *--------------------------------------------------------------
 *
 * DrawBufferedControl --
 *
 *    This function uses a dummy Macintosh window to allow
 *    drawing Mac controls to any GWorld (including off-screen
 *    bitmaps).  In addition, this code may apply custom
 *    colors passed in the TkButton.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    Control is to the GWorld.  Static state created on
 *    first invocation of this routine.
 *
 *--------------------------------------------------------------
 */

static void
DrawBufferedControl(
    TkButton *butPtr,         /* Tk button. */
    GWorldPtr destPort,       /* Off screen GWorld. */
    GC gc,              /* The GC we are drawing into - needed for
                         * the bevel button */
    Pixmap pixmap       /* The pixmap we are drawing into - needed
                                   for the bevel button */
    )       
{
    ControlRef controlHandle;
    CCTabHandle ccTabHandle;
    int windowColorChanged = false;
    RGBColor saveBackColor;
    int isBevel = 0;
    
    if (windowRef == NULL) {
        InitSampleControls();
    }
    
    /*
     * Now swap in the passed in GWorld for the portBits of our fake
     * window.  We also adjust various fields in the WindowRecord to make
     * the system think this is a normal window.
     * Note, we can use DrawControlInCurrentPort under Appearance, so we don't
     * need to swap pixmaps.
     */
    
    if (!TkMacHaveAppearance()) {
        ((CWindowPeek) windowRef)->port.portPixMap = destPort->portPixMap;
    }
    
    ((CWindowPeek) windowRef)->port.portRect = destPort->portRect;
    RectRgn(((CWindowPeek) windowRef)->port.visRgn, &destPort->portRect);
    RectRgn(((CWindowPeek) windowRef)->strucRgn, &destPort->portRect);
    RectRgn(((CWindowPeek) windowRef)->updateRgn, &destPort->portRect);
    RectRgn(((CWindowPeek) windowRef)->contRgn, &destPort->portRect);
    PortChanged(windowRef);
    
    /*
     * Set up control in hidden window to match what we need
     * to draw in the buffered window.  
     */
     
    isBevel = 0;   
    switch (butPtr->type) {
      case TYPE_BUTTON:
            if (TkMacHaveAppearance()) {
              if ((butPtr->image == None) && (butPtr->bitmap == None)) {
                  controlHandle = buttonHandle;
                  ccTabHandle = buttonTabHandle;
              } else {
                  if (butPtr->borderWidth <= 2) {
                        controlHandle = smallBevelHandle;
                    } else if (butPtr->borderWidth == 3) {
                        controlHandle = medBevelHandle;
                    } else {
                        controlHandle = largeBevelHandle;
                    }
                    ccTabHandle = buttonTabHandle;
                    SetupBevelButton(butPtr, controlHandle, destPort, 
                            gc, pixmap);
                  isBevel = 1;              
              }
          } else {
              controlHandle = buttonHandle;
              ccTabHandle = buttonTabHandle;
          }
          break;
      case TYPE_RADIO_BUTTON:
          if (TkMacHaveAppearance()) {
              if (((butPtr->image == None) && (butPtr->bitmap == None))
                      || (butPtr->indicatorOn)) {
                  controlHandle = radioHandle;
                  ccTabHandle = radioTabHandle;
              } else {
                  if (butPtr->borderWidth <= 2) {
                        controlHandle = smallStickyBevelHandle;
                    } else if (butPtr->borderWidth == 3) {
                        controlHandle = medStickyBevelHandle;
                    } else {
                        controlHandle = largeStickyBevelHandle;
                    }
                  ccTabHandle = radioTabHandle;
                    SetupBevelButton(butPtr, controlHandle, destPort, 
                            gc, pixmap);
                  isBevel = 1;              
              }
          } else {
              controlHandle = radioHandle;
              ccTabHandle = radioTabHandle;
            }            
          break;
      case TYPE_CHECK_BUTTON:
          if (TkMacHaveAppearance()) {
              if (((butPtr->image == None) && (butPtr->bitmap == None))
                      || (butPtr->indicatorOn)) {
                  controlHandle = checkHandle;
                  ccTabHandle = checkTabHandle;
              } else {
                  if (butPtr->borderWidth <= 2) {
                        controlHandle = smallStickyBevelHandle;
                    } else if (butPtr->borderWidth == 3) {
                        controlHandle = medStickyBevelHandle;
                    } else {
                        controlHandle = largeStickyBevelHandle;
                    }
                  ccTabHandle = checkTabHandle;
                    SetupBevelButton(butPtr, controlHandle, destPort, 
                            gc, pixmap);
                  isBevel = 1;              
              }
          } else {
              controlHandle = checkHandle;
              ccTabHandle = checkTabHandle;
            }            
          break;
    }
    
    (**controlHandle).contrlRect.left = butPtr->inset;
    (**controlHandle).contrlRect.top = butPtr->inset;
    (**controlHandle).contrlRect.right = Tk_Width(butPtr->tkwin) 
          - butPtr->inset;
    (**controlHandle).contrlRect.bottom = Tk_Height(butPtr->tkwin) 
          - butPtr->inset;
          
    /*
     * Setting the control visibility by hand does not 
     * seem to work under Appearance. 
     */
     
    if (TkMacHaveAppearance()) {
        SetControlVisibility(controlHandle, true, false);      
        (**userPaneHandle).contrlRect.left = 0;
        (**userPaneHandle).contrlRect.top = 0;
        (**userPaneHandle).contrlRect.right = Tk_Width(butPtr->tkwin);
        (**userPaneHandle).contrlRect.bottom = Tk_Height(butPtr->tkwin);
    } else {      
        (**controlHandle).contrlVis = 255;
    }     
    
              
    
    if (butPtr->flags & SELECTED) {
      (**controlHandle).contrlValue = 1;
    } else {
      (**controlHandle).contrlValue = 0;
    }
    
    if (butPtr->state == tkActiveUid) {
        if (isBevel) {
            (**controlHandle).contrlHilite = kControlButtonPart;
        } else {
          switch (butPtr->type) {
              case TYPE_BUTTON:
                (**controlHandle).contrlHilite = kControlButtonPart;
                break;
              case TYPE_RADIO_BUTTON:
                (**controlHandle).contrlHilite = kControlRadioButtonPart;
                break;
              case TYPE_CHECK_BUTTON:
                (**controlHandle).contrlHilite = kControlCheckBoxPart;
                break;
          }
      }
    } else if (butPtr->state == tkDisabledUid) {
      (**controlHandle).contrlHilite = kControlInactivePart;
    } else {
      (**controlHandle).contrlHilite = kControlNoPart;
    }

    /*
     * Before we draw the control we must add the hidden window back to the
     * main window list.  Otherwise, radiobuttons and checkbuttons will draw
     * incorrectly.  I don't really know why - but clearly the control draw
     * proc needs to have the controls window in the window list.
     */

    ((CWindowPeek) windowRef)->nextWindow = (CWindowPeek) LMGetWindowList();
    LMSetWindowList(windowRef);

    /*
     * Now we can set the port to our doctered up window.  We next need
     * to muck with the colors for the port & window to draw the control
     * with the proper Tk colors.  If we need to we also draw a default
     * ring for buttons.
     * Under Appearance, we draw the control directly into destPort, and
     * just set the default control data.
     */

    if (TkMacHaveAppearance()) {
        SetPort((GrafPort *) destPort);
    } else {
        SetPort(windowRef);
    }
    
    windowColorChanged = UpdateControlColors(butPtr, controlHandle, 
      ccTabHandle, &saveBackColor);
      
    if ((butPtr->type == TYPE_BUTTON) && TkMacHaveAppearance()) {
        Boolean isDefault;
        
        if (butPtr->defaultState == tkActiveUid) {
          isDefault = true;
      } else {
          isDefault = false;
      }
      SetControlData(controlHandle, kControlNoPart, 
              kControlPushButtonDefaultTag,
              sizeof(isDefault), (Ptr) &isDefault);                     
    }

    if (TkMacHaveAppearance()) {
        DrawControlInCurrentPort(userPaneHandle);
    } else {
        Draw1Control(controlHandle);
    }

    if (!TkMacHaveAppearance() &&
            (butPtr->type == TYPE_BUTTON) && 
          (butPtr->defaultState == tkActiveUid)) {
      Rect box = (**controlHandle).contrlRect;
      RGBColor rgbColor;

      TkSetMacColor(butPtr->highlightColorPtr->pixel, &rgbColor);
      RGBForeColor(&rgbColor);
      PenSize(butPtr->highlightWidth - 1, butPtr->highlightWidth - 1);
      InsetRect(&box, -butPtr->highlightWidth, -butPtr->highlightWidth);
      FrameRoundRect(&box, 16, 16);
    }
    
    if (windowColorChanged) {
      RGBColor dummyColor;
      ChangeBackgroundWindowColor(windowRef, saveBackColor, &dummyColor);
    }
    
    /*
     * Clean up: remove the hidden window from the main window list, and
     * hide the control we drew.  
     */

    if (TkMacHaveAppearance()) {
        SetControlVisibility(controlHandle, false, false);
        if (isBevel) {
            KillPicture(bevelButtonContent.u.picture);
        }     
    } else {      
        (**controlHandle).contrlVis = 0;
    }     
    LMSetWindowList((WindowRef) ((CWindowPeek) windowRef)->nextWindow);
}

/*
 *--------------------------------------------------------------
 *
 * InitSampleControls --
 *
 *    This function initializes a dummy Macintosh window and
 *      sample controls to allow drawing Mac controls to any GWorld 
 *      (including off-screen bitmaps).  
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    Controls & a window are created.
 *
 *--------------------------------------------------------------
 */

static void
InitSampleControls()
{
      Rect geometry = {0, 0, 10, 10};
      CWindowPeek windowList;

      /*
       * Create a dummy window that we can draw to.  We will
       * actually replace this window's bitmap with the one
       * we want to draw to at a later time.  This window and
       * the data structures attached to it are only deallocated
       * on exit of the application.
       */
      
      windowRef = NewCWindow(NULL, &geometry, "\pempty", false, 
          zoomDocProc, (WindowRef) -1, true, 0);
      if (windowRef == NULL) {
          panic("Can't allocate buffer window.");
      }
      
      /*
       * Now add the three standard controls to hidden window.  We
       * only create one of each and reuse them for every widget in
       * Tk.
       * Under Appearance, we have to embed the controls in a UserPane
       * control, so that we can color the background text in 
       * radiobuttons and checkbuttons.
       */
      
      SetPort(windowRef);
      
        if (TkMacHaveAppearance()) {
            
          OSErr err;
          ControlRef dontCare;
          
          /* Adding UserPaneBackgroundProcs to the root control does
           * not seem to work, so we have to add another UserPane to 
           * the root control.
           */
           
          err = CreateRootControl(windowRef, &dontCare);
          if (err != noErr) {
              panic("Can't create root control in DrawBufferedControl");
          }
          
          userPaneHandle = NewControl(windowRef, &geometry, "\p",
            true, kControlSupportsEmbedding|kControlHasSpecialBackground, 
              0, 1, kControlUserPaneProc, (SInt32) 0);
          SetUserPaneSetUpSpecialBackgroundProc(userPaneHandle,
                UserPaneBackgroundProc);
          SetUserPaneDrawProc(userPaneHandle, UserPaneDraw);

          buttonHandle = NewControl(windowRef, &geometry, "\p",
              false, 1, 0, 1, kControlPushButtonProc, (SInt32) 0);
          EmbedControl(buttonHandle, userPaneHandle);
          checkHandle = NewControl(windowRef, &geometry, "\p",
          false, 1, 0, 1, kControlCheckBoxProc, (SInt32) 0);
          EmbedControl(checkHandle, userPaneHandle);
          radioHandle = NewControl(windowRef, &geometry, "\p",
              false, 1, 0, 1, kControlRadioButtonProc, (SInt32) 0);
          EmbedControl(radioHandle, userPaneHandle);
        smallBevelHandle = NewControl(windowRef, &geometry, "\p",
                false, 0, 0, 
              kControlBehaviorOffsetContents << 16 | kControlContentPictHandle, 
              kControlBevelButtonSmallBevelProc, (SInt32) 0);
        EmbedControl(smallBevelHandle, userPaneHandle);
        medBevelHandle = NewControl(windowRef, &geometry, "\p",
                false, 0, 0, 
              kControlBehaviorOffsetContents << 16 | kControlContentPictHandle, 
              kControlBevelButtonNormalBevelProc, (SInt32) 0);
        EmbedControl(medBevelHandle, userPaneHandle);
        largeBevelHandle = NewControl(windowRef, &geometry, "\p",
                false, 0, 0, 
              kControlBehaviorOffsetContents << 16 | kControlContentPictHandle, 
              kControlBevelButtonLargeBevelProc, (SInt32) 0);
        EmbedControl(largeBevelHandle, userPaneHandle);
        bevelButtonContent.contentType = kControlContentPictHandle;
        smallStickyBevelHandle = NewControl(windowRef, &geometry, "\p",
              false, 0, 0, 
              (kControlBehaviorOffsetContents | kControlBehaviorSticky) << 16 
              | kControlContentPictHandle, 
              kControlBevelButtonSmallBevelProc, (SInt32) 0);
        EmbedControl(smallStickyBevelHandle, userPaneHandle);
        medStickyBevelHandle = NewControl(windowRef, &geometry, "\p",
              false, 0, 0, 
              (kControlBehaviorOffsetContents | kControlBehaviorSticky) << 16 
              | kControlContentPictHandle, 
              kControlBevelButtonNormalBevelProc, (SInt32) 0);
        EmbedControl(medStickyBevelHandle, userPaneHandle);
        largeStickyBevelHandle = NewControl(windowRef, &geometry, "\p",
              false, 0, 0, 
              (kControlBehaviorOffsetContents | kControlBehaviorSticky) << 16 
              | kControlContentPictHandle, 
              kControlBevelButtonLargeBevelProc, (SInt32) 0);
        EmbedControl(largeStickyBevelHandle, userPaneHandle);
    
        picParams.version = -2;
        picParams.hRes = 0x00480000;
        picParams.vRes = 0x00480000;
        picParams.srcRect.top = 0;
        picParams.srcRect.left = 0;
    
          ((CWindowPeek) windowRef)->visible = true;
        } else {
      buttonHandle = NewControl(windowRef, &geometry, "\p",
            false, 1, 0, 1, pushButProc, (SInt32) 0);
      checkHandle = NewControl(windowRef, &geometry, "\p",
            false, 1, 0, 1, checkBoxProc, (SInt32) 0);
      radioHandle = NewControl(windowRef, &geometry, "\p",
            false, 1, 0, 1, radioButProc, (SInt32) 0);
      ((CWindowPeek) windowRef)->visible = true;

      buttonTabHandle = (CCTabHandle) NewHandle(sizeof(CtlCTab));
      checkTabHandle = (CCTabHandle) NewHandle(sizeof(CtlCTab));
      radioTabHandle = (CCTabHandle) NewHandle(sizeof(CtlCTab));
        }

      /*
       * Remove our window from the window list.  This way our
       * applications and others will not be confused that this
       * window exists - but no one knows about it.
       */

      windowList = (CWindowPeek) LMGetWindowList();
      if (windowList == (CWindowPeek) windowRef) {
          LMSetWindowList((WindowRef) windowList->nextWindow);
      } else {
          while ((windowList != NULL) 
                && (windowList->nextWindow != (CWindowPeek) windowRef)) {
            windowList = windowList->nextWindow;
          }
          if (windowList != NULL) {
            windowList->nextWindow = windowList->nextWindow->nextWindow;
          }
      }
      ((CWindowPeek) windowRef)->nextWindow = NULL;

      /* 
       * Create an exit handler to clean up this mess if we our
       * unloaded etc.  We need to remember the windows portPixMap
       * so it isn't leaked.
       *
       * TODO: The ButtonExitProc doesn't currently work and the
       * code it includes will crash the Mac on exit from Tk.
       
       oldPixPtr = ((CWindowPeek) windowRef)->port.portPixMap;
       Tcl_CreateExitHandler(ButtonExitProc, (ClientData) NULL);
       */

}

/*
 *--------------------------------------------------------------
 *
 * SetupBevelButton --
 *
 *    Sets up the Bevel Button with image by copying the
 *    source image onto the PicHandle for the button.
 *
 * Results:
 *    None
 *
 * Side effects:
 *    The image or bitmap for the button is copied over to a picture.
 *
 *--------------------------------------------------------------
 */
void
SetupBevelButton(
    TkButton *butPtr,         /* Tk button. */
    ControlRef controlHandle,    /* The control to set this picture to */
    GWorldPtr destPort,       /* Off screen GWorld. */
    GC gc,              /* The GC we are drawing into - needed for
                         * the bevel button */
    Pixmap pixmap       /* The pixmap we are drawing into - needed
                                   for the bevel button */
    )
{
    int height, width;
    ControlButtonGraphicAlignment theAlignment;
    
    SetPort((GrafPtr) destPort);

    if (butPtr->image != None) {
        Tk_SizeOfImage(butPtr->image, 
                &width, &height);
    } else {
        Tk_SizeOfBitmap(butPtr->display, butPtr->bitmap, 
                &width, &height);
    }
            
    if ((butPtr->width > 0) && (butPtr->width < width)) {
      width = butPtr->width;
    }
    if ((butPtr->height > 0) && (butPtr->height < height)) {
      height = butPtr->height;
    }
    
    picParams.srcRect.right = width;
    picParams.srcRect.bottom = height;
    
    bevelButtonContent.u.picture = OpenCPicture(&picParams);
    
    /*
     * TO DO - There is one case where XCopyPlane calls CopyDeepMask,
     * which does not get recorded in the picture.  So the bitmap code
     * will fail in that case.
     */
     
    if ((butPtr->selectImage != NULL) && (butPtr->flags & SELECTED)) {
        Tk_RedrawImage(butPtr->selectImage, 0, 0, width, height,
              pixmap, 0, 0);
    } else if (butPtr->image != NULL) {
        Tk_RedrawImage(butPtr->image, 0, 0, width, 
            height, pixmap, 0, 0);
    } else {                      
        XSetClipOrigin(butPtr->display, gc, 0, 0);
        XCopyPlane(butPtr->display, butPtr->bitmap, pixmap, gc, 0, 0,
                (unsigned int) width, (unsigned int) height, 0, 0, 1);
    }
    
    ClosePicture();
    
    SetControlData(controlHandle, kControlButtonPart,
            kControlBevelButtonContentTag,
            sizeof(ControlButtonContentInfo),
            (char *) &bevelButtonContent);
            
    if (butPtr->anchor == TK_ANCHOR_N) {
            theAlignment = kControlBevelButtonAlignTop;
     } else if (butPtr->anchor == TK_ANCHOR_NE) { 
            theAlignment = kControlBevelButtonAlignTopRight;
     } else if (butPtr->anchor == TK_ANCHOR_E) { 
            theAlignment = kControlBevelButtonAlignRight;
     } else if (butPtr->anchor == TK_ANCHOR_SE) {
            theAlignment = kControlBevelButtonAlignBottomRight;
     } else if (butPtr->anchor == TK_ANCHOR_S) {
            theAlignment = kControlBevelButtonAlignBottom;
     } else if (butPtr->anchor == TK_ANCHOR_SW) {
            theAlignment = kControlBevelButtonAlignBottomLeft;
     } else if (butPtr->anchor == TK_ANCHOR_W) {
            theAlignment = kControlBevelButtonAlignLeft;
     } else if (butPtr->anchor == TK_ANCHOR_NW) {
            theAlignment = kControlBevelButtonAlignTopLeft;
     } else if (butPtr->anchor == TK_ANCHOR_CENTER) {
            theAlignment = kControlBevelButtonAlignCenter;
    }

    SetControlData(controlHandle, kControlButtonPart,
            kControlBevelButtonGraphicAlignTag,
            sizeof(ControlButtonGraphicAlignment),
            (char *) &theAlignment);

}

/*
 *--------------------------------------------------------------
 *
 * SetUserPaneDrawProc --
 *
 *    Utility function to add a UserPaneDrawProc
 *      to a userPane control.  From MoreControls code
 *      from Apple DTS.
 *
 * Results:
 *    MacOS system error.
 *
 * Side effects:
 *    The user pane gets a new UserPaneDrawProc.
 *
 *--------------------------------------------------------------
 */
pascal OSErr SetUserPaneDrawProc (
        ControlRef control,
        ControlUserPaneDrawProcPtr upp)
{
    ControlUserPaneDrawUPP myControlUserPaneDrawUPP;
    myControlUserPaneDrawUPP = NewControlUserPaneDrawProc(upp);   
    return SetControlData (control, 
              kControlNoPart, kControlUserPaneDrawProcTag, 
              sizeof(myControlUserPaneDrawUPP), 
              (Ptr) &myControlUserPaneDrawUPP);
}

/*
 *--------------------------------------------------------------
 *
 * SetUserPaneSetUpSpecialBackgroundProc --
 *
 *    Utility function to add a UserPaneBackgroundProc
 *      to a userPane control
 *
 * Results:
 *    MacOS system error.
 *
 * Side effects:
 *    The user pane gets a new UserPaneBackgroundProc.
 *
 *--------------------------------------------------------------
 */
pascal OSErr
SetUserPaneSetUpSpecialBackgroundProc(
    ControlRef control, 
    ControlUserPaneBackgroundProcPtr upp)
{
    ControlUserPaneBackgroundUPP myControlUserPaneBackgroundUPP;
    myControlUserPaneBackgroundUPP = NewControlUserPaneBackgroundProc(upp);
    return SetControlData (control, kControlNoPart, 
                kControlUserPaneBackgroundProcTag, 
              sizeof(myControlUserPaneBackgroundUPP), 
              (Ptr) &myControlUserPaneBackgroundUPP);
}

/*
 *--------------------------------------------------------------
 *
 * UserPaneDraw --
 *
 *    This function draws the background of the user pane that will 
 *      lie under checkboxes and radiobuttons.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    The user pane gets updated to the current color.
 *
 *--------------------------------------------------------------
 */
pascal void
UserPaneDraw(
    ControlRef control,
    ControlPartCode cpc)
{
      Rect contrlRect = (**control).contrlRect;
      RGBBackColor (&gUserPaneBackground);
      EraseRect (&contrlRect);
}

/*
 *--------------------------------------------------------------
 *
 * UserPaneBackgroundProc --
 *
 *    This function sets up the background of the user pane that will 
 *      lie under checkboxes and radiobuttons.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    The user pane background gets set to the current color.
 *
 *--------------------------------------------------------------
 */

pascal void
UserPaneBackgroundProc(
    ControlHandle,
    ControlBackgroundPtr info)
{
    if (info->colorDevice) {
        RGBBackColor (&gUserPaneBackground);
    }
}

/*
 *--------------------------------------------------------------
 *
 * UpdateControlColors --
 *
 *    This function will review the colors used to display
 *    a Macintosh button.  If any non-standard colors are
 *    used we create a custom palette for the button, populate
 *    with the colors for the button and install the palette.
 *
 *      Under Appearance, we just set the pointer that will be
 *      used by the UserPaneDrawProc.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    The Macintosh control may get a custom palette installed.
 *
 *--------------------------------------------------------------
 */

static int
UpdateControlColors(
    TkButton *butPtr,
    ControlRef controlHandle,
    CCTabHandle ccTabHandle,
    RGBColor *saveColorPtr)
{
    XColor *xcolor;
    
    /*
     * Under Appearance we cannot change the background of the
     * button itself.  However, the color we are setting is the color
     *  of the containing userPane.  This will be the color that peeks 
     * around the rounded corners of the button.  
     * We make this the highlightbackground rather than the background,
     * because if you color the background of a frame containing a
     * button, you usually also color the highlightbackground as well,
     * or you will get a thin grey ring around the button.
     */
      
    if (TkMacHaveAppearance() && (butPtr->type == TYPE_BUTTON)) {
        xcolor = Tk_3DBorderColor(butPtr->highlightBorder);
    } else {
    xcolor = Tk_3DBorderColor(butPtr->normalBorder);
    }
    if (TkMacHaveAppearance()) {
         TkSetMacColor(xcolor->pixel, &gUserPaneBackground);
     } else {
    (**ccTabHandle).ccSeed = 0;
    (**ccTabHandle).ccRider = 0;
    (**ccTabHandle).ctSize = 3;
    (**ccTabHandle).ctTable[0].value = cBodyColor;
    TkSetMacColor(xcolor->pixel,
      &(**ccTabHandle).ctTable[0].rgb);
    (**ccTabHandle).ctTable[1].value = cTextColor;
    TkSetMacColor(butPtr->normalFg->pixel,
      &(**ccTabHandle).ctTable[1].rgb);
    (**ccTabHandle).ctTable[2].value = cFrameColor;
    TkSetMacColor(butPtr->highlightColorPtr->pixel,
      &(**ccTabHandle).ctTable[2].rgb);
    SetControlColor(controlHandle, ccTabHandle);
        
    if (((xcolor->pixel >> 24) != CONTROL_BODY_PIXEL) && 
          ((butPtr->type == TYPE_CHECK_BUTTON) ||
                (butPtr->type == TYPE_RADIO_BUTTON))) {
      RGBColor newColor;
      
      TkSetMacColor(xcolor->pixel, &newColor);
      ChangeBackgroundWindowColor((**controlHandle).contrlOwner,
            newColor, saveColorPtr);
      return true;
    }
    }
    
    return false;
}

/*
 *--------------------------------------------------------------
 *
 * ChangeBackgroundWindowColor --
 *
 *    This procedure will change the background color entry
 *    in the Window's colortable.  The system isn't notified
 *    of the change.  This call should only be used to fool
 *    the drawing routines for checkboxes and radiobuttons.
 *    Any change should be temporary and be reverted after
 *    the widget is drawn.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    The Window's color table will be adjusted.
 *
 *--------------------------------------------------------------
 */

static void
ChangeBackgroundWindowColor(
    WindowRef macintoshWindow,      /* A Mac window whose color to change. */
    RGBColor rgbColor,        /* The new RGB Color for the background. */
    RGBColor *oldColor)       /* The old color of the background. */
{
    AuxWinHandle auxWinHandle;
    WCTabHandle winCTabHandle;
    short ctIndex;
    ColorSpecPtr rgbScan;
      
    GetAuxWin(macintoshWindow, &auxWinHandle);
    winCTabHandle = (WCTabHandle) ((**auxWinHandle).awCTable);

    /*
     * Scan through the color table until we find the content
     * (background) color for the window.  Don't tell the system
     * about the change - it will generate damage and we will get
     * into an infinite loop.
     */

    ctIndex = (**winCTabHandle).ctSize;
    while (ctIndex > -1) {
      rgbScan = ctIndex + (**winCTabHandle).ctTable;

      if (rgbScan->value == wContentColor) {
          *oldColor = rgbScan->rgb;
          rgbScan->rgb = rgbColor;
          break;
      }
      ctIndex--;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ButtonExitProc --
 *
 *    This procedure is invoked just before the application exits.
 *    It frees all of the control handles, our dummy window, etc.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    Memory is freed.
 *
 *----------------------------------------------------------------------
 */

static void
ButtonExitProc(clientData)
    ClientData clientData;          /* Not used. */
{
    Rect pixRect = {0, 0, 10, 10};
    Rect rgnRect = {0, 0, 0, 0};

    /*
     * Restore our dummy window to it's origional state by putting it
     * back in the window list and restoring it's bits.  The destroy
     * the controls and window.
     */
 
    ((CWindowPeek) windowRef)->nextWindow = (CWindowPeek) LMGetWindowList();
    LMSetWindowList(windowRef);
    ((CWindowPeek) windowRef)->port.portPixMap = oldPixPtr;
    ((CWindowPeek) windowRef)->port.portRect = pixRect;
    RectRgn(((CWindowPeek) windowRef)->port.visRgn, &rgnRect);
    RectRgn(((CWindowPeek) windowRef)->strucRgn, &rgnRect);
    RectRgn(((CWindowPeek) windowRef)->updateRgn, &rgnRect);
    RectRgn(((CWindowPeek) windowRef)->contRgn, &rgnRect);
    PortChanged(windowRef);

    DisposeControl(buttonHandle);
    DisposeControl(checkHandle);
    DisposeControl(radioHandle);
    DisposeWindow(windowRef);
    windowRef = NULL;
}

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