/**
 * $Id$
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * 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 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2008 Blender Foundation.
 * All rights reserved.
 *
 * 
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <string.h>
#include <stdio.h>


#include "MEM_guardedalloc.h"

#include "BLI_blenlib.h"
#include "BLI_math.h"
#include "BLI_rand.h"

#include "BKE_context.h"
#include "BKE_screen.h"

#include "ED_screen.h"

#include "WM_api.h"
#include "WM_types.h"

#include "BIF_gl.h"

#include "UI_resources.h"
#include "UI_view2d.h"


#include "outliner_intern.h"

static void outliner_main_area_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;
	
	UI_view2d_region_reinit(&ar->v2d, V2D_COMMONVIEW_LIST, ar->winx, ar->winy);
	
	/* own keymap */
	keymap= WM_keymap_find(wm->defaultconf, "Outliner", SPACE_OUTLINER, 0);
	WM_event_add_keymap_handler_bb(&ar->handlers, keymap, &ar->v2d.mask, &ar->winrct);
}

static void outliner_main_area_draw(const bContext *C, ARegion *ar)
{
	View2D *v2d= &ar->v2d;
	View2DScrollers *scrollers;
	
	/* clear */
	UI_ThemeClearColor(TH_BACK);
	glClear(GL_COLOR_BUFFER_BIT);
	
	draw_outliner(C);
	
	/* reset view matrix */
	UI_view2d_view_restore(C);
	
	/* scrollers */
	scrollers= UI_view2d_scrollers_calc(C, v2d, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY, V2D_ARG_DUMMY);
	UI_view2d_scrollers_draw(C, v2d, scrollers);
	UI_view2d_scrollers_free(scrollers);
}


static void outliner_main_area_free(ARegion *ar)
{
}


static void outliner_main_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch(wmn->category) {
		case NC_SCENE:
			switch(wmn->data) {
				case ND_OB_ACTIVE:
				case ND_OB_SELECT:
				case ND_OB_VISIBLE:
				case ND_OB_RENDER:
				case ND_MODE:
				case ND_KEYINGSET:
				case ND_FRAME:
				case ND_RENDER_OPTIONS:
				case ND_LAYER:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_OBJECT:
			switch(wmn->data) {
				case ND_TRANSFORM:
					/* transform doesn't change outliner data */
					break;
				case ND_BONE_ACTIVE:
				case ND_BONE_SELECT:
				case ND_PARENT:
					ED_region_tag_redraw(ar);
					break;
				case ND_CONSTRAINT:
					switch(wmn->action) {
						case NA_ADDED:
						case NA_REMOVED:
						case NA_RENAME:
							ED_region_tag_redraw(ar);
							break;
					}
					break;
				case ND_MODIFIER:
					/* all modifier actions now */
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_GROUP:
			/* all actions now, todo: check outliner view mode? */
			ED_region_tag_redraw(ar);
			break;
		case NC_LAMP:
			/* For updating lamp icons, when changing lamp type */
			if(wmn->data == ND_LIGHTING_DRAW)
				ED_region_tag_redraw(ar);
				break;
		case NC_SPACE:
			if(wmn->data == ND_SPACE_OUTLINER)
				ED_region_tag_redraw(ar);
				break;
		case NC_ID:
			if(wmn->action == NA_RENAME)
				ED_region_tag_redraw(ar);
			break;
	}
	
}


/* ************************ header outliner area region *********************** */

/* add handlers, stuff you only do once or on area/region changes */
static void outliner_header_area_init(wmWindowManager *wm, ARegion *ar)
{
	ED_region_header_init(ar);
}

static void outliner_header_area_draw(const bContext *C, ARegion *ar)
{
	ED_region_header(C, ar);
}

static void outliner_header_area_free(ARegion *ar)
{
}

static void outliner_header_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch(wmn->category) {
		case NC_SCENE:
			if(wmn->data == ND_KEYINGSET)
				ED_region_tag_redraw(ar);
			break;
		case NC_SPACE:
			if(wmn->data == ND_SPACE_OUTLINER)
				ED_region_tag_redraw(ar);
			break;
	}
}

/* ******************** default callbacks for outliner space ***************** */

static SpaceLink *outliner_new(const bContext *C)
{
	ARegion *ar;
	SpaceOops *soutliner;

	soutliner= MEM_callocN(sizeof(SpaceOops), "initoutliner");
	soutliner->spacetype= SPACE_OUTLINER;
	
	/* header */
	ar= MEM_callocN(sizeof(ARegion), "header for outliner");
	
	BLI_addtail(&soutliner->regionbase, ar);
	ar->regiontype= RGN_TYPE_HEADER;
	ar->alignment= RGN_ALIGN_BOTTOM;
	
	/* main area */
	ar= MEM_callocN(sizeof(ARegion), "main area for outliner");
	
	BLI_addtail(&soutliner->regionbase, ar);
	ar->regiontype= RGN_TYPE_WINDOW;
	
	ar->v2d.scroll = (V2D_SCROLL_RIGHT|V2D_SCROLL_BOTTOM_O);
	ar->v2d.align = (V2D_ALIGN_NO_NEG_X|V2D_ALIGN_NO_POS_Y);
	ar->v2d.keepzoom = (V2D_LOCKZOOM_X|V2D_LOCKZOOM_Y|V2D_LIMITZOOM|V2D_KEEPASPECT);
	ar->v2d.keeptot= V2D_KEEPTOT_STRICT;
	ar->v2d.minzoom= ar->v2d.maxzoom= 1.0f;
	
	return (SpaceLink*)soutliner;
}

/* not spacelink itself */
static void outliner_free(SpaceLink *sl)
{
	SpaceOops *soutliner= (SpaceOops*)sl;
	
	outliner_free_tree(&soutliner->tree);
	if(soutliner->treestore) {
		if(soutliner->treestore->data) MEM_freeN(soutliner->treestore->data);
		MEM_freeN(soutliner->treestore);
	}
	
}

/* spacetype; init callback */
static void outliner_init(wmWindowManager *wm, ScrArea *sa)
{
	
}

static SpaceLink *outliner_duplicate(SpaceLink *sl)
{
	SpaceOops *soutliner= (SpaceOops *)sl;
	SpaceOops *soutlinern= MEM_dupallocN(soutliner);

	soutlinern->tree.first= soutlinern->tree.last= NULL;
	soutlinern->treestore= NULL;
	
	return (SpaceLink *)soutlinern;
}

/* only called once, from space_api/spacetypes.c */
void ED_spacetype_outliner(void)
{
	SpaceType *st= MEM_callocN(sizeof(SpaceType), "spacetype time");
	ARegionType *art;
	
	st->spaceid= SPACE_OUTLINER;
	strncpy(st->name, "Outliner", BKE_ST_MAXNAME);
	
	st->new= outliner_new;
	st->free= outliner_free;
	st->init= outliner_init;
	st->duplicate= outliner_duplicate;
	st->operatortypes= outliner_operatortypes;
	st->keymap= outliner_keymap;
	
	/* regions: main window */
	art= MEM_callocN(sizeof(ARegionType), "spacetype time region");
	art->regionid = RGN_TYPE_WINDOW;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D;
	
	art->init= outliner_main_area_init;
	art->draw= outliner_main_area_draw;
	art->free= outliner_main_area_free;
	art->listener= outliner_main_area_listener;
	BLI_addhead(&st->regiontypes, art);
	
	/* regions: header */
	art= MEM_callocN(sizeof(ARegionType), "spacetype time region");
	art->regionid = RGN_TYPE_HEADER;
	art->prefsizey= HEADERY;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D|ED_KEYMAP_FRAMES|ED_KEYMAP_HEADER;
	
	art->init= outliner_header_area_init;
	art->draw= outliner_header_area_draw;
	art->free= outliner_header_area_free;
	art->listener= outliner_header_area_listener;
	BLI_addhead(&st->regiontypes, art);
	
	BKE_spacetype_register(st);
}