/* GormInspectorsManager.m
 *
 * Copyright (C) 1999 Free Software Foundation, Inc.
 *
 * Author:	Richard Frith-Macdonald <richard@brainstrom.co.uk>
 * Date:	1999
 *
 * This file is part of GNUstep.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111 USA.
 */

#include <AppKit/NSNibConnector.h>
#include <Foundation/NSException.h>
#include <InterfaceBuilder/IBInspector.h>
#include <InterfaceBuilder/IBInspectorMode.h>
#include <InterfaceBuilder/IBObjectAdditions.h>
#include <InterfaceBuilder/IBInspectorManager.h>
#include "GormPrivate.h"
#include "GormImage.h"
#include "GormSound.h"


#define NUM_DEFAULT_INSPECTORS 5

@interface GormDummyInspector : IBInspector
{
    NSButton *button;
}
- (NSString *)title;
@end


@implementation GormDummyInspector
- (id) init
{
  self = [super init];
  if (self != nil)
    {
      if([NSBundle loadNibNamed: @"GormDummyInspector" owner: self])
      {
	  [button setStringValue: [self title]];
      }
    }
  return self;
}

- (NSString *)title
{
  return nil;
}
@end;

/*
 *	The GormEmptyInspector is a placeholder for an empty selection.
 */
@interface GormEmptyInspector : GormDummyInspector
@end

@implementation GormEmptyInspector
- (NSString *)title
{
  return _(@"Empty Selection");
}
@end

/*
 *	The GormMultipleInspector is a placeholder for a multiple selection.
 */
@interface GormMultipleInspector : GormDummyInspector
@end

@implementation GormMultipleInspector
- (NSString *)title
{
  return _(@"Multiple Selection");
}
@end

/*
 *	The GormNotApplicableInspector is a uitility for odd objects.
 */
@interface GormNotApplicableInspector : GormDummyInspector
@end

@implementation GormNotApplicableInspector
- (NSString *)title
{
  return _(@"Not Applicable");
}
@end

@implementation GormInspectorsManager

- (void) dealloc
{
  [[NSNotificationCenter defaultCenter] removeObserver: self];
  RELEASE(oldInspector);
  RELEASE(cache);
  RELEASE(panel);
  [super dealloc];
}

- (void) handleNotification: (NSNotification*)aNotification
{
  NSString	*name = [aNotification name];

  if ([name isEqual: IBWillBeginTestingInterfaceNotification] == YES)
    {
      if ([panel isVisible] == YES)
	{
	  hiddenDuringTest = YES;
	  [panel orderOut: self];
	}
    }
  else if ([name isEqual: IBWillEndTestingInterfaceNotification] == YES)
    {
      if (hiddenDuringTest == YES)
	{
	  hiddenDuringTest = NO;
	  [panel orderFront: self];
	}
    }
}

- (id) init
{
  if((self = [super init]) != nil)
    {
      NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
      
      if([NSBundle loadNibNamed: @"GormInspectorPanel" owner: self])
	{
	  // initialized the cache...
	  cache = [[NSMutableDictionary alloc] init];
	  
	  // set the name under which this panel saves it's dimensions.
	  [panel setFrameUsingName: @"Inspector"];
	  [panel setFrameAutosaveName: @"Inspector"];
	  
	  // reset current tag indicator.
	  current = -1;
	  
	  inspector = [[GormEmptyInspector alloc] init];
	  [cache setObject: inspector forKey: @"GormEmptyInspector"];
	  RELEASE(inspector);
	  inspector = [[GormMultipleInspector alloc] init];
	  [cache setObject: inspector forKey: @"GormMultipleInspector"];
	  DESTROY(inspector);
	  
	  [self setCurrentInspector: 0];
	  
	  [nc addObserver: self
	      selector: @selector(handleNotification:)
	      name: IBWillBeginTestingInterfaceNotification
	      object: nil];
	  [nc addObserver: self
	      selector: @selector(handleNotification:)
	      name: IBWillEndTestingInterfaceNotification
	      object: nil];
	}
    }
  
  return self;
}

- (NSPanel*) panel
{
  return panel;
}

- (void) updateSelection
{
  if ([NSApp isConnecting] == YES)
    {
      [popup selectItemAtIndex: 1];
      [popup setNeedsDisplay: YES];
      [panel makeKeyAndOrderFront: self];
      current = 1;
    }
  else if (current >= [popup numberOfItems])
    {
      current = 1;
    }
  [self setCurrentInspector: self];
}

- (void) setClassInspector
{
  current = 4;
  [self setCurrentInspector: self];
}

- (void) _addDefaultModes
{
  // remove all items... clear out current state
  [modes removeAllObjects];
  currentMode = nil;
  
  // Attributes inspector...
  [self addInspectorModeWithIdentifier: @"AttributesInspector"
	forObject: selectedObject
	localizedLabel: _(@"Attributes")
	inspectorClassName: [selectedObject inspectorClassName]
	ordering: 0.0];

  // Connection inspector...
  [self addInspectorModeWithIdentifier: @"ConnectionInspector"
	forObject: selectedObject
	localizedLabel: _(@"Connections")
	inspectorClassName: [selectedObject connectInspectorClassName]
	ordering: 1.0];

  // Size inspector...
  [self addInspectorModeWithIdentifier: @"SizeInspector"
	forObject: selectedObject
	localizedLabel: _(@"Size")
	inspectorClassName: [selectedObject sizeInspectorClassName]
	ordering: 2.0];

  // Help inspector...
  [self addInspectorModeWithIdentifier: @"HelpInspector"
	forObject: selectedObject
	localizedLabel: _(@"Help")
	inspectorClassName: [selectedObject helpInspectorClassName]
	ordering: 3.0];

  // Custom class inspector...
  [self addInspectorModeWithIdentifier: @"CustomClassInspector"
	forObject: selectedObject
	localizedLabel: _(@"Custom Class")
	inspectorClassName: [selectedObject classInspectorClassName]
	ordering: 4.0];
}

- (void) _refreshPopUp
{
  NSEnumerator *en = [modes objectEnumerator];
  int index = 0;
  id obj = nil;

  [popup removeAllItems];
  while((obj = [en nextObject]) != nil)
    {
      int tag = index + 1;
      NSMenuItem *item;
      [popup addItemWithTitle: [obj localizedLabel]];

      item = (NSMenuItem *)[popup itemAtIndex: index];
      [item setTarget: self];
      [item setAction: @selector(setCurrentInspector:)];
      [item setKeyEquivalent: [NSString stringWithFormat: @"%d",tag]];
      [item setTag: tag];
      index++;
    }
}

- (void) setCurrentInspector: (id)anObj
{
  NSNotificationCenter	*nc = [NSNotificationCenter defaultCenter];
  NSArray	*selection = [[(id<IB>)NSApp selectionOwner] selection];
  unsigned	count = [selection count];
  id		obj = [selection lastObject];
  NSView	*newView = nil;
  NSView	*oldView = nil;
  NSString	*newInspector = nil;
  int           tag = 0; 

  if (anObj != self)
    {
      tag = [anObj tag];
      current = ((tag > 0)?(tag - 1):tag);
    }

  // reset current under certain conditions.
  if(current < 0)
    {
      current = 0;
    }

  NSDebugLog(@"current %i",current);

  // refresh object.
  selectedObject = obj;
  
  // remove any items beyond the original items on the list..
  [self _addDefaultModes];
  
  // inform the world that the object is about to be inspected.
  [nc postNotificationName: IBWillInspectObjectNotification object: obj];
  
  // set key equivalent
  [self _refreshPopUp];
  
  if([modes count] == NUM_DEFAULT_INSPECTORS)
    {
      if(current > (NUM_DEFAULT_INSPECTORS - 1))
	{
	  current = 0;
	}
    }

  if (count == 0)
    {
      newInspector = @"GormEmptyInspector";
    }
  else if (count > 1)
    {
      newInspector = @"GormMultipleInspector";
    }
  else
    {
      currentMode = [modes objectAtIndex: current];
      newInspector = [currentMode inspectorClassName];
    }
  
  /*
   * Set panel title for the type of object being inspected.
   */
  if (selectedObject == nil)
    {
      [panel setTitle: _(@"Inspector")];
    }
  else if([selectedObject isKindOfClass: [GormClassProxy class]]) 
    {
      [panel setTitle: [NSString stringWithFormat: @"Class Edit Inspector:%@",
				 [selectedObject className]]];
    }
  else
    {
      NSString *newTitle = [selectedObject objectNameForInspectorTitle]; 
      [panel setTitle: [NSString stringWithFormat:_(@"%@ Inspector"), newTitle]];
    }

  if (newInspector == nil)
    {
      newInspector = @"GormNotApplicableInspector";
    }

  if ([oldInspector isEqual: newInspector] == NO)
    {
      id prevInspector = nil;

      /*
       * Return the inspector view to its original window and release the old
       * inspector.
       */
       if(inspector != nil)
	{
	  [[inspector okButton] removeFromSuperview];
	  [[inspector revertButton] removeFromSuperview];
	}

      ASSIGN(oldInspector, newInspector);
      prevInspector = inspector;
      inspector = [cache objectForKey: newInspector];
      if (inspector == nil)
	{
	  Class	c = NSClassFromString(newInspector);

	  inspector = [[c alloc] init];
	  /* Try to gracefully handle an inspector creation error */
	  while (inspector == nil && (obj = [obj superclass]) 
		 && current == 0)
	    {
	      NSDebugLog(@"Error loading %@ inspector", newInspector);
	      newInspector = [obj inspectorClassName];
	      inspector = [[NSClassFromString(newInspector) alloc] init];
	    }
	  [cache setObject: inspector forKey: newInspector];
	  RELEASE(inspector);
	}

      oldView = [inspectorView contentView];
      newView = [[inspector window] contentView];
      if (newView != nil)
	{   
	  id initialResponder = [[inspector window] initialFirstResponder];
	  NSView	*outer = [panel contentView];
	  NSRect	rect = [outer bounds];
	  
	  /* Set initialFirstResponder */
	  if (buttonView != nil)
	    {
	      [buttonView removeFromSuperview];
	      buttonView = nil;
	    }

	  rect.size.height = [selectionView frame].origin.y - 3;
	  if ([inspector wantsButtons] == YES)
	    {
	      NSRect	buttonsRect;
	      NSRect	bRect = NSMakeRect(0, 0, 60, 20);
	      NSButton	*ok;
	      NSButton	*revert;

	      rect.size.height = [selectionView frame].origin.y;
	      buttonsRect = NSMakeRect(0,0,rect.size.width,IVB);
	      rect.origin.y += IVB;
	      rect.size.height -= (IVB + 3);

	      buttonView = [[NSView alloc] initWithFrame: buttonsRect];
	      [buttonView setAutoresizingMask: NSViewWidthSizable];
	      [outer addSubview: buttonView];
	      RELEASE(buttonView);

	      ok = [inspector okButton];
	      if (ok != nil)
		{
		  bRect = [ok frame];
		  bRect.origin.y = 10;
		  bRect.origin.x = buttonsRect.size.width-10-bRect.size.width;
		  [ok setFrame: bRect];
		  [buttonView addSubview: ok];
		}

	      revert = [inspector revertButton];
	      if (revert != nil)
		{
		  bRect = [revert frame];
	 	  bRect.origin.y = 10;
		  bRect.origin.x = 10;
		  [revert setFrame: bRect];
		  [buttonView addSubview: revert];
		}
	    }
	  else
	    {
	      rect.size.height = [selectionView frame].origin.y - 3;
	      [buttonView removeFromSuperview];
	    }

	  /*
	   * Make the inspector view the correct size for the viewable panel,
	   * and set the frame size for the new contents before adding them.
	   */
	  [inspectorView setFrame: rect];
	  rect.origin = NSZeroPoint;
	  [newView setFrame: rect];
	  RETAIN(oldView);
	  [inspectorView setContentView: newView];
	  [[prevInspector window] setContentView: oldView];
	  RELEASE(oldView);

	  /* Set the default First responder to the new View */
	  if ( initialResponder )
	    { 
	      [panel setInitialFirstResponder:initialResponder];
	    }
	}
    }

  // reset the popup..
  [popup selectItemAtIndex: current];

  // inspect the object.
  [inspector setObject: [currentMode object]];
}
@end