/* 
   GSToolbarCustomizationPalette.m

   The palette which allows to customize toolbar
   
   Copyright (C) 2007 Free Software Foundation, Inc.

   Author:  Quentin Mathe <qmathe@club-internet.fr>
   Date: January 2007
   
   This file is part of the GNUstep GUI Library.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
   
   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; see the file COPYING.LIB.
   If not, write to the Free Software Foundation,
   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/ 

#import <Foundation/NSArray.h>
#import <Foundation/NSDebug.h>
#import <Foundation/NSDictionary.h>
#import <Foundation/NSEnumerator.h>
#import <Foundation/NSNotification.h>
#import "AppKit/NSNibLoading.h"
#import "AppKit/NSWindow.h"
#import "AppKit/NSToolbar.h"
#import "AppKit/NSToolbarItem.h"
#import "AppKit/NSPopUpButton.h"
#import "NSToolbarFrameworkPrivate.h"
#import "GSToolbarCustomizationPalette.h"

#define DEBUG_LEVEL @"Toolbar"

/* Customization View */
@interface GSToolbarCustomizationView : NSView
{
  NSArray *_paletteItems;
}

- (void) setToolbarItems: (NSArray *)items;
- (NSArray *) paletteItemsWithToolbarItems: (NSArray *)items;
- (void) layout;

@end

@implementation GSToolbarCustomizationView

- (void)dealloc
{
  [_paletteItems release];
  [super dealloc];
}

/* If the toolbar item has a custom view and the item is in use in the 
   toolbar, this view has already a superview. We need to make a copy of it 
   in order to be able to put it in the customization view. 
   As a safety measure, we make a copy of all toolbar items, thereby of all
   views. This ensures the toolbar items displayed in the palette don't 
   reference a toolbar. */
- (NSArray *) paletteItemsWithToolbarItems: (NSArray *)items
{
  NSMutableArray *paletteItems = [NSMutableArray array];
  NSEnumerator *e = [items objectEnumerator];
  NSToolbarItem *item = nil;

  while ((item = [e nextObject]) != nil)
    {
      NSToolbarItem *newItem = [item copy];

      if ([newItem paletteLabel] != nil)
        [newItem setLabel: [newItem paletteLabel]];
      [newItem setEnabled: YES];
      [newItem _layout];
      [paletteItems addObject: newItem];
      RELEASE(newItem);
    }

  NSDebugLLog(DEBUG_LEVEL, @"Generated palette items %@ from toolbar items %@", 
    paletteItems, items);

  return paletteItems;
}

- (void) layout
{
  NSSize boundsSize = [self bounds].size;
  float maxWidth = boundsSize.width;
  float maxHeight = boundsSize.height;
  float hAccumulator = 0.0;
  float vAccumulator = 0.0;
  NSEnumerator *e = [[self subviews] objectEnumerator];
  NSView *layoutedView = nil;
  int index = 0;

  // Loop over all subviews
  while ((layoutedView = [e nextObject]) != nil)
    {
      NSRect frame;
      NSSize size;
      float height;
      float width;

      [(id)layoutedView layout];
      frame = [layoutedView frame];
      size = frame.size;
      height = size.height;
      width = size.width;
 
      if ((hAccumulator + width) <= maxWidth)
        {
          // Position view in row
          if (vAccumulator < height)
            {
              vAccumulator = height;
              // FIXME: need to adjust all other elements of row
            }
        }
      else
        {
          // Move on to next row
          maxHeight -= vAccumulator;
          hAccumulator = 0.0;
          vAccumulator = height;
        }

      [layoutedView setFrameOrigin: NSMakePoint(hAccumulator, 
                                                maxHeight - vAccumulator)];
      [layoutedView setAutoresizingMask:NSViewMinYMargin];
      hAccumulator += width;
      index++;
    }
  maxHeight -= vAccumulator; // adjust for final row
  if (maxHeight != 0) // need to grow (or shrink) the window to accommodate more (or fewer) items
    {
      NSRect windowFrame = [[self window] frame];
	  windowFrame.origin.y += maxHeight;
	  windowFrame.size.height -= maxHeight;
	  [[self window] setFrame:windowFrame display:NO];
    }
}

- (void) setToolbarItems: (NSArray *)items
{
  NSEnumerator *e;
  NSView *itemView;
  NSToolbarItem *item;
  [_paletteItems release];
  _paletteItems = [[self paletteItemsWithToolbarItems: items] retain];

  // Remove all old subviews
  e = [[self subviews] objectEnumerator];
  while ((itemView = [e nextObject]) != nil)
    {
      [itemView removeFromSuperview];
    }

  NSDebugLLog(DEBUG_LEVEL, @"Will insert the views of toolbar items %@ in \
    customization view", _paletteItems);
  e = [_paletteItems objectEnumerator];
  while ((item = [e nextObject]) != nil)
    {
      itemView = [item _backView];
      if (itemView != nil)
        {
          [self addSubview: itemView];
        }
      else
        {
          NSLog(@"Toolbar item %@ will not be visible in the customization \
            view or if you insert it in a toolbar now. The view is already in \
            use in superview or does not implement NSCoding protocol", item);
        }
    }

  [self layout];
}

@end

/* Main implementation */

@implementation GSToolbarCustomizationPalette

+ (id) palette
{
  return AUTORELEASE([[GSToolbarCustomizationPalette alloc] 
    init]);
}

- (id) init
{
  self = [super init];
  if (self != nil)
    {
      BOOL nibLoaded = [NSBundle loadNibNamed: @"GSToolbarCustomizationPalette" 
                                        owner: self];

      if (nibLoaded == NO)
        {
          NSLog(@"Failed to load GSToolbarCustomizationPalette");
          RELEASE(self);
          return nil;
        }

      _allowedItems = [NSMutableArray new];
      _defaultItems = [NSMutableArray new];
    }

  return self;
}

- (void) dealloc
{
  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

  [nc removeObserver: self];

//  DESTROY(_customizationWindow);
//  DESTROY(_customizationView);
//  DESTROY(_defaultTemplateView);
//  DESTROY(_sizeCheckBox);
//  DESTROY(_displayPopup);
//  DESTROY(_doneButton);

  DESTROY(_defaultItems);
  DESTROY(_allowedItems);

  [super dealloc];
}

- (void) awakeFromNib
{
  NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];

  NSDebugLLog(DEBUG_LEVEL, @"GSToolbarCustomizationPalette awaking from nib");

  [_defaultTemplateView setAutoresizingMask:NSViewWidthSizable | NSViewMaxYMargin];
  
  {
	NSRect dtvFrame;
	NSRect cvFrame;

    // for now, _defaultTemplateView isn't implemented, so remove it
	dtvFrame = [_defaultTemplateView frame];
	[_defaultTemplateView removeFromSuperview];
	// expand _customizationView to fill the space
	cvFrame = [_customizationView frame];
	cvFrame.size.height += dtvFrame.size.height;
	cvFrame.origin.y -= dtvFrame.size.height;
	[_customizationView setFrame:cvFrame];
  }
  
  [nc addObserver: self 
         selector: @selector(paletteDidEnd:) 
             name: NSWindowWillCloseNotification
           object: _customizationWindow];
}

/* It's safer to keep no reference on the toolbar itself. The customization 
   palette isn't bound to the toolbar passed as parameter, in other words the 
   palette can be used to customize other toolbars with the same identifier.
   In spite of this, a reference must be kept on the toolbar which initiated 
   the customization to let it know when the customization has ended. */
- (void) showForToolbar: (NSToolbar *)toolbar
{
  NSArray *itemIdentifiers = nil;
  NSEnumerator *e = nil;
  NSString *identifier = nil;
  NSToolbarDisplayMode tag = [toolbar displayMode];
  NSToolbarSizeMode size = [toolbar sizeMode];
  NSView *toolbarView;
  NSRect toolbarFrame;
  NSPoint bottomCenter;
  NSRect windowFrame;
  NSPoint topCenter;

  [_allowedItems removeAllObjects];
  [_defaultItems removeAllObjects];
  [_displayPopup selectItemWithTag: tag];

  // Set toolbar size checkbox...
  if(size == NSToolbarSizeModeSmall)
    {
      [_sizeCheckBox setState: NSOnState];
    }
  else
    {
      [_sizeCheckBox setState: NSOffState];
    }
  
  itemIdentifiers = [toolbar _allowedItemIdentifiers];
  e = [itemIdentifiers objectEnumerator];
  while ((identifier = [e nextObject]) != nil)
    {
      NSToolbarItem *item = [toolbar _toolbarItemForIdentifier: identifier
				     willBeInsertedIntoToolbar: NO];
      NSDebugLLog(DEBUG_LEVEL, @"item %@ for ident %@", item, identifier);
      [_allowedItems addObject: item]; 
    }

  itemIdentifiers = [toolbar _defaultItemIdentifiers];
  e = [itemIdentifiers objectEnumerator];
  while ((identifier = [e nextObject]) != nil)
    {
      NSToolbarItem *item = [toolbar _toolbarItemForIdentifier: identifier
				     willBeInsertedIntoToolbar: NO];      
      [_defaultItems addObject: item];
    }

  [_customizationView setToolbarItems: _allowedItems];

  /* We retain ourself to keep us alive until the palette is closed (this is 
     useful in case nobody retains us). */
  RETAIN(self);
  /* No need to retain the toolbar because it will first request us to close 
     when it goes away. */
  _toolbar = toolbar;

  // position the customization window centered just below the toolbar
  toolbarView = [_toolbar _toolbarView];
  toolbarFrame = [toolbarView convertRect:[toolbarView bounds] toView:nil];
  bottomCenter = NSMakePoint(toolbarFrame.origin.x + (toolbarFrame.size.width/2), toolbarFrame.origin.y);
  bottomCenter = [[toolbarView window] convertBaseToScreen:bottomCenter];
  windowFrame = [_customizationWindow frame];
  topCenter = NSMakePoint(windowFrame.origin.x + (windowFrame.size.width/2), windowFrame.origin.y + windowFrame.size.height);
  windowFrame.origin.x += bottomCenter.x-topCenter.x;
  windowFrame.origin.y += bottomCenter.y-topCenter.y;
  [_customizationWindow setFrame:windowFrame display:NO];
  [_customizationWindow setLevel:NSFloatingWindowLevel];
  [_customizationWindow makeKeyAndOrderFront: self];
}

- (void) close
{
  [_customizationWindow close];
}

- (void) reset: (id) sender
{
  // reset the toolbar to it's defaults.
  [_toolbar _resetConfig];
}

- (void) size: (id) sender
{
  NSToolbarSizeMode mode = NSToolbarSizeModeRegular;

  if([sender state] == NSOnState)
    {
      mode = NSToolbarSizeModeSmall;
    }

  [_toolbar setSizeMode: mode];
  [_toolbar _saveConfig];
}

- (void) paletteDidEnd: (NSNotification *)notif
{
  [_toolbar _setCustomizationPaletteIsRunning: NO];
  _toolbar = nil;

  /* We can now get rid safely of the extra retain done in -showForToolbar: */
  RELEASE(self);
}

- (void) show: (id) sender
{
  NSToolbarDisplayMode displayMode = (NSToolbarDisplayMode)
    [[sender selectedItem] tag];
  [_toolbar setDisplayMode: displayMode];
  [_toolbar _saveConfig];
}

@end