/**
 * $Id$
 *
 * ***** 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 "DNA_object_types.h"
#include "DNA_scene_types.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 "ED_object.h"

#include "BIF_gl.h"


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


#include "RNA_access.h"

#include "UI_resources.h"

#include "view3d_intern.h"	// own include

/* ******************** manage regions ********************* */

ARegion *view3d_has_buttons_region(ScrArea *sa)
{
	ARegion *ar, *arnew;
	
	for(ar= sa->regionbase.first; ar; ar= ar->next)
		if(ar->regiontype==RGN_TYPE_UI)
			return ar;
	
	/* add subdiv level; after header */
	for(ar= sa->regionbase.first; ar; ar= ar->next)
		if(ar->regiontype==RGN_TYPE_HEADER)
			break;
	
	/* is error! */
	if(ar==NULL) return NULL;
	
	arnew= MEM_callocN(sizeof(ARegion), "buttons for view3d");
	
	BLI_insertlinkafter(&sa->regionbase, ar, arnew);
	arnew->regiontype= RGN_TYPE_UI;
	arnew->alignment= RGN_ALIGN_RIGHT;
	
	arnew->flag = RGN_FLAG_HIDDEN;
	
	return arnew;
}

ARegion *view3d_has_tools_region(ScrArea *sa)
{
	ARegion *ar, *artool=NULL, *arprops=NULL, *arhead;
	
	for(ar= sa->regionbase.first; ar; ar= ar->next) {
		if(ar->regiontype==RGN_TYPE_TOOLS)
			artool= ar;
		if(ar->regiontype==RGN_TYPE_TOOL_PROPS)
			arprops= ar;
	}
	
	/* tool region hide/unhide also hides props */
	if(arprops && artool) return artool;
	
	if(artool==NULL) {
		/* add subdiv level; after header */
		for(arhead= sa->regionbase.first; arhead; arhead= arhead->next)
			if(arhead->regiontype==RGN_TYPE_HEADER)
				break;
		
		/* is error! */
		if(arhead==NULL) return NULL;
		
		artool= MEM_callocN(sizeof(ARegion), "tools for view3d");
		
		BLI_insertlinkafter(&sa->regionbase, arhead, artool);
		artool->regiontype= RGN_TYPE_TOOLS;
		artool->alignment= RGN_ALIGN_LEFT; //RGN_OVERLAP_LEFT;
		artool->flag = RGN_FLAG_HIDDEN;
	}

	if(arprops==NULL) {
		/* add extra subdivided region for tool properties */
		arprops= MEM_callocN(sizeof(ARegion), "tool props for view3d");
		
		BLI_insertlinkafter(&sa->regionbase, artool, arprops);
		arprops->regiontype= RGN_TYPE_TOOL_PROPS;
		arprops->alignment= RGN_ALIGN_BOTTOM|RGN_SPLIT_PREV;
	}
	
	return artool;
}

/* ****************************************************** */

/* function to always find a regionview3d context inside 3D window */
RegionView3D *ED_view3d_context_rv3d(bContext *C)
{
	RegionView3D *rv3d= CTX_wm_region_view3d(C);
	
	if(rv3d==NULL) {
		ScrArea *sa =CTX_wm_area(C);
		if(sa && sa->spacetype==SPACE_VIEW3D) {
			ARegion *ar;
			for(ar= sa->regionbase.first; ar; ar= ar->next)
				if(ar->regiontype==RGN_TYPE_WINDOW)
					return ar->regiondata;
		}
	}
	return rv3d;
}

/* Most of the time this isn't needed since you could assume the view matrix was
 * set while drawing, however when functions like mesh_foreachScreenVert are
 * called by selection tools, we can't be sure this object was the last.
 *
 * for example, transparent objects are drawn after editmode and will cause
 * the rv3d mat's to change and break selection.
 *
 * 'ED_view3d_init_mats_rv3d' should be called before
 * view3d_project_short_clip and view3d_project_short_noclip in cases where
 * these functions are not used during draw_object
 */
void ED_view3d_init_mats_rv3d(struct Object *ob, struct RegionView3D *rv3d)
{
	/* local viewmat and persmat, to calculate projections */
	mul_m4_m4m4(rv3d->viewmatob, ob->obmat, rv3d->viewmat);
	mul_m4_m4m4(rv3d->persmatob, ob->obmat, rv3d->persmat);

	/* we have to multiply instead of loading viewmatob to make
	   it work with duplis using displists, otherwise it will
	   override the dupli-matrix */
	glMultMatrixf(ob->obmat);

	/* initializes object space clipping, speeds up clip tests */
	ED_view3d_local_clipping(rv3d, ob->obmat);
}

/* ******************** default callbacks for view3d space ***************** */

static SpaceLink *view3d_new(const bContext *C)
{
	Scene *scene= CTX_data_scene(C);
	ARegion *ar;
	View3D *v3d;
	RegionView3D *rv3d;
	
	v3d= MEM_callocN(sizeof(View3D), "initview3d");
	v3d->spacetype= SPACE_VIEW3D;
	v3d->blockscale= 0.7f;
	v3d->lay= v3d->layact= 1;
	if(scene) {
		v3d->lay= v3d->layact= scene->lay;
		v3d->camera= scene->camera;
	}
	v3d->scenelock= 1;
	v3d->grid= 1.0f;
	v3d->gridlines= 16;
	v3d->gridsubdiv = 10;
	v3d->drawtype= OB_WIRE;
	
	v3d->gridflag |= V3D_SHOW_X;
	v3d->gridflag |= V3D_SHOW_Y;
	v3d->gridflag |= V3D_SHOW_FLOOR;
	v3d->gridflag &= ~V3D_SHOW_Z;
	
	v3d->lens= 35.0f;
	v3d->near= 0.01f;
	v3d->far= 500.0f;

	v3d->twtype= V3D_MANIP_TRANSLATE;
	v3d->around= V3D_CENTROID;
	
	/* header */
	ar= MEM_callocN(sizeof(ARegion), "header for view3d");
	
	BLI_addtail(&v3d->regionbase, ar);
	ar->regiontype= RGN_TYPE_HEADER;
	ar->alignment= RGN_ALIGN_BOTTOM;
	
	/* tool shelf */
	ar= MEM_callocN(sizeof(ARegion), "toolshelf for view3d");
	
	BLI_addtail(&v3d->regionbase, ar);
	ar->regiontype= RGN_TYPE_TOOLS;
	ar->alignment= RGN_ALIGN_LEFT;
	ar->flag = RGN_FLAG_HIDDEN;
	
	/* tool properties */
	ar= MEM_callocN(sizeof(ARegion), "tool properties for view3d");
	
	BLI_addtail(&v3d->regionbase, ar);
	ar->regiontype= RGN_TYPE_TOOL_PROPS;
	ar->alignment= RGN_ALIGN_BOTTOM|RGN_SPLIT_PREV;
	ar->flag = RGN_FLAG_HIDDEN;
	
	/* buttons/list view */
	ar= MEM_callocN(sizeof(ARegion), "buttons for view3d");
	
	BLI_addtail(&v3d->regionbase, ar);
	ar->regiontype= RGN_TYPE_UI;
	ar->alignment= RGN_ALIGN_RIGHT;
	ar->flag = RGN_FLAG_HIDDEN;
	
	/* main area */
	ar= MEM_callocN(sizeof(ARegion), "main area for view3d");
	
	BLI_addtail(&v3d->regionbase, ar);
	ar->regiontype= RGN_TYPE_WINDOW;
	
	ar->regiondata= MEM_callocN(sizeof(RegionView3D), "region view3d");
	rv3d= ar->regiondata;
	rv3d->viewquat[0]= 1.0f;
	rv3d->persp= 1;
	rv3d->view= 7;
	rv3d->dist= 10.0;
	
	return (SpaceLink *)v3d;
}

/* not spacelink itself */
static void view3d_free(SpaceLink *sl)
{
	View3D *vd= (View3D *) sl;

	BGpic *bgpic;
	for(bgpic= vd->bgpicbase.first; bgpic; bgpic= bgpic->next) {
		if(bgpic->ima) bgpic->ima->id.us--;
	}
	BLI_freelistN(&vd->bgpicbase);

	if(vd->localvd) MEM_freeN(vd->localvd);
	
	if(vd->properties_storage) MEM_freeN(vd->properties_storage);
	
}


/* spacetype; init callback */
static void view3d_init(struct wmWindowManager *wm, ScrArea *sa)
{

}

static SpaceLink *view3d_duplicate(SpaceLink *sl)
{
	View3D *v3do= (View3D *)sl;
	View3D *v3dn= MEM_dupallocN(sl);
	BGpic *bgpic;
	
	/* clear or remove stuff from old */
	
// XXX	BIF_view3d_previewrender_free(v3do);
	
	if(v3do->localvd) {
		v3do->localvd= NULL;
		v3do->properties_storage= NULL;
		v3do->lay= v3dn->localvd->lay;
		v3do->lay &= 0xFFFFFF;
	}
	
	/* copy or clear inside new stuff */

	BLI_duplicatelist(&v3dn->bgpicbase, &v3do->bgpicbase);
	for(bgpic= v3dn->bgpicbase.first; bgpic; bgpic= bgpic->next)
		if(bgpic->ima)
			bgpic->ima->id.us++;

	v3dn->properties_storage= NULL;
	
	return (SpaceLink *)v3dn;
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_main_area_init(wmWindowManager *wm, ARegion *ar)
{
	ListBase *lb;
	wmKeyMap *keymap;

	/* object ops. */
	
	/* pose is not modal, operator poll checks for this */
	keymap= WM_keymap_find(wm->defaultconf, "Pose", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	keymap= WM_keymap_find(wm->defaultconf, "Object Mode", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Image Paint", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Vertex Paint", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Weight Paint", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	keymap= WM_keymap_find(wm->defaultconf, "Face Mask", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Sculpt", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	keymap= WM_keymap_find(wm->defaultconf, "Mesh", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	keymap= WM_keymap_find(wm->defaultconf, "Curve", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	keymap= WM_keymap_find(wm->defaultconf, "Armature", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Pose", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Metaball", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	keymap= WM_keymap_find(wm->defaultconf, "Lattice", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	/* armature sketching needs to take over mouse */
	keymap= WM_keymap_find(wm->defaultconf, "Armature Sketch", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Particle", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	/* editfont keymap swallows all... */
	keymap= WM_keymap_find(wm->defaultconf, "Font", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Object Non-modal", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "Frames", 0, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	/* own keymap, last so modes can override it */
	keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	keymap= WM_keymap_find(wm->defaultconf, "3D View", SPACE_VIEW3D, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
	
	/* add drop boxes */
	lb= WM_dropboxmap_find("View3D", SPACE_VIEW3D, RGN_TYPE_WINDOW);
	
	WM_event_add_dropbox_handler(&ar->handlers, lb);
	
}

static int view3d_ob_drop_poll(bContext *C, wmDrag *drag, wmEvent *event)
{
	if(drag->type==WM_DRAG_ID) {
		ID *id= (ID *)drag->poin;
		if( GS(id->name)==ID_OB )
			return 1;
	}
	return 0;
}

static int view3d_mat_drop_poll(bContext *C, wmDrag *drag, wmEvent *event)
{
	if(drag->type==WM_DRAG_ID) {
		ID *id= (ID *)drag->poin;
		if( GS(id->name)==ID_MA )
			return 1;
	}
	return 0;
}

static int view3d_ima_drop_poll(bContext *C, wmDrag *drag, wmEvent *event)
{
	if( ED_view3d_give_base_under_cursor(C, event->mval) ) {
		if(drag->type==WM_DRAG_ID) {
			ID *id= (ID *)drag->poin;
			if( GS(id->name)==ID_IM )
				return 1;
		}
		else if(drag->type==WM_DRAG_PATH){
			if(ELEM(drag->icon, 0, ICON_FILE_IMAGE))	/* rule might not work? */
				return 1;
		}
	}
	return 0;
}

static void view3d_ob_drop_copy(wmDrag *drag, wmDropBox *drop)
{
	ID *id= (ID *)drag->poin;
	PointerRNA ptr;

	/* need to put name in sub-operator in macro */
	ptr= RNA_pointer_get(drop->ptr, "OBJECT_OT_add_named");
	if(ptr.data)
		RNA_string_set(&ptr, "name", id->name+2);
	else
		RNA_string_set(drop->ptr, "name", id->name+2);
}

static void view3d_id_drop_copy(wmDrag *drag, wmDropBox *drop)
{
	ID *id= (ID *)drag->poin;
	
	RNA_string_set(drop->ptr, "name", id->name+2);
}

static void view3d_id_path_drop_copy(wmDrag *drag, wmDropBox *drop)
{
	ID *id= (ID *)drag->poin;
	
	if(id)
		RNA_string_set(drop->ptr, "name", id->name+2);
	if(drag->path[0]) 
		RNA_string_set(drop->ptr, "filepath", drag->path);
}


/* region dropbox definition */
static void view3d_dropboxes(void)
{
	ListBase *lb= WM_dropboxmap_find("View3D", SPACE_VIEW3D, RGN_TYPE_WINDOW);
	
	WM_dropbox_add(lb, "OBJECT_OT_add_named_cursor", view3d_ob_drop_poll, view3d_ob_drop_copy);
	WM_dropbox_add(lb, "OBJECT_OT_drop_named_material", view3d_mat_drop_poll, view3d_id_drop_copy);
	WM_dropbox_add(lb, "MESH_OT_drop_named_image", view3d_ima_drop_poll, view3d_id_path_drop_copy);
}



/* type callback, not region itself */
static void view3d_main_area_free(ARegion *ar)
{
	RegionView3D *rv3d= ar->regiondata;
	
	if(rv3d) {
		if(rv3d->localvd) MEM_freeN(rv3d->localvd);
		if(rv3d->clipbb) MEM_freeN(rv3d->clipbb);

		// XXX	retopo_free_view_data(rv3d);
		if(rv3d->ri) { 
			// XXX		BIF_view3d_previewrender_free(rv3d);
		}
		
		if(rv3d->depths) {
			if(rv3d->depths->depths) MEM_freeN(rv3d->depths->depths);
			MEM_freeN(rv3d->depths);
		}
		MEM_freeN(rv3d);
		ar->regiondata= NULL;
	}
}

/* copy regiondata */
static void *view3d_main_area_duplicate(void *poin)
{
	if(poin) {
		RegionView3D *rv3d= poin, *new;
	
		new= MEM_dupallocN(rv3d);
		if(rv3d->localvd) 
			new->localvd= MEM_dupallocN(rv3d->localvd);
		if(rv3d->clipbb) 
			new->clipbb= MEM_dupallocN(rv3d->clipbb);
		
		new->depths= NULL;
		new->retopo_view_data= NULL;
		new->ri= NULL;
		new->gpd= NULL;
		new->sms= NULL;
		new->smooth_timer= NULL;
		
		return new;
	}
	return NULL;
}

static void view3d_main_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch(wmn->category) {
		case NC_ANIMATION:
			switch(wmn->data) {
				case ND_KEYFRAME_PROP:
				case ND_NLA_ACTCHANGE:
					ED_region_tag_redraw(ar);
					break;
				case ND_NLA:
				case ND_KEYFRAME:
					if (wmn->action == NA_EDITED)
						ED_region_tag_redraw(ar);
					break;
				case ND_ANIMCHAN:
					if (wmn->action == NA_SELECTED)
						ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_SCENE:
			switch(wmn->data) {
				case ND_FRAME:
				case ND_TRANSFORM:
				case ND_OB_ACTIVE:
				case ND_OB_SELECT:
				case ND_LAYER:
				case ND_RENDER_OPTIONS:
				case ND_MODE:
					ED_region_tag_redraw(ar);
					break;
			}
			if (wmn->action == NA_EDITED)
				ED_region_tag_redraw(ar);
			break;
		case NC_OBJECT:
			switch(wmn->data) {
				case ND_BONE_ACTIVE:
				case ND_BONE_SELECT:
				case ND_TRANSFORM:
				case ND_POSE:
				case ND_DRAW:
				case ND_MODIFIER:
				case ND_CONSTRAINT:
				case ND_KEYS:
				case ND_PARTICLE:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_GEOM:
			switch(wmn->data) {
				case ND_DATA:
				case ND_SELECT:
					ED_region_tag_redraw(ar);
					break;
			}
			switch(wmn->action) {
				case NA_EDITED:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_GROUP:
			/* all group ops for now */
			ED_region_tag_redraw(ar);
			break;
		case NC_BRUSH:
			if(wmn->action == NA_EDITED)
				ED_region_tag_redraw_overlay(ar);
			break;			
		case NC_MATERIAL:
			switch(wmn->data) {
				case ND_SHADING_DRAW:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_WORLD:
			switch(wmn->data) {
				case ND_WORLD_DRAW:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_LAMP:
			switch(wmn->data) {
				case ND_LIGHTING_DRAW:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_IMAGE:	
			/* this could be more fine grained checks if we had
			 * more context than just the region */
			ED_region_tag_redraw(ar);
			break;
		case NC_TEXTURE:	
			/* same as above */
			ED_region_tag_redraw(ar);
			break;
		case NC_SPACE:
			if(wmn->data == ND_SPACE_VIEW3D) {
				if (wmn->subtype == NS_VIEW3D_GPU) {
					RegionView3D *rv3d= ar->regiondata;
					rv3d->rflag |= RV3D_GPULIGHT_UPDATE;
				}
				ED_region_tag_redraw(ar);
			}
			break;
		case NC_ID:
			if(wmn->action == NA_RENAME)
				ED_region_tag_redraw(ar);
			break;
		case NC_SCREEN:
			if(wmn->data == ND_GPENCIL)	
				ED_region_tag_redraw(ar);
			else if(wmn->data==ND_ANIMPLAY)
				ED_region_tag_redraw(ar);
			break;
	}
}

/* concept is to retrieve cursor type context-less */
static void view3d_main_area_cursor(wmWindow *win, ScrArea *sa, ARegion *ar)
{
	Scene *scene= win->screen->scene;

	if(scene->obedit) {
		WM_cursor_set(win, CURSOR_EDIT);
	}
	else {
		WM_cursor_set(win, CURSOR_STD);
	}
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_header_area_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
	
	WM_event_add_keymap_handler(&ar->handlers, keymap);

	ED_region_header_init(ar);
}

static void view3d_header_area_draw(const bContext *C, ARegion *ar)
{
	ED_region_header(C, ar);
}

static void view3d_header_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch(wmn->category) {
		case NC_SCENE:
			switch(wmn->data) {
				case ND_FRAME:
				case ND_OB_ACTIVE:
				case ND_OB_SELECT:
				case ND_MODE:
				case ND_LAYER:
				case ND_TOOLSETTINGS:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_SPACE:
			if(wmn->data == ND_SPACE_VIEW3D)
				ED_region_tag_redraw(ar);
			break;
	}
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_buttons_area_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;

	ED_region_panels_init(wm, ar);
	
	keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
}

static void view3d_buttons_area_draw(const bContext *C, ARegion *ar)
{
	ED_region_panels(C, ar, 1, NULL, -1);
}

static void view3d_buttons_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch(wmn->category) {
		case NC_ANIMATION:
			switch(wmn->data) {
				case ND_KEYFRAME_PROP:
				case ND_NLA_ACTCHANGE:
					ED_region_tag_redraw(ar);
					break;
				case ND_NLA:
				case ND_KEYFRAME:
					if (wmn->action == NA_EDITED)
						ED_region_tag_redraw(ar);
					break;	
			}
			break;
		case NC_SCENE:
			switch(wmn->data) {
				case ND_FRAME:
				case ND_OB_ACTIVE:
				case ND_OB_SELECT:
				case ND_MODE:
				case ND_LAYER:
					ED_region_tag_redraw(ar);
					break;
			}
			switch(wmn->action) {
				case NA_EDITED:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_OBJECT:
			switch(wmn->data) {
				case ND_BONE_ACTIVE:
				case ND_BONE_SELECT:
				case ND_TRANSFORM:
				case ND_POSE:
				case ND_DRAW:
				case ND_KEYS:
				case ND_MODIFIER:
					ED_region_tag_redraw(ar);
					break;
			}
			break;
		case NC_GEOM:
			switch(wmn->data) {
				case ND_DATA:
				case ND_SELECT:
					ED_region_tag_redraw(ar);
					break;
			}
			if (wmn->action == NA_EDITED)
				ED_region_tag_redraw(ar);
			break;
		case NC_TEXTURE:
			/* for brush textures */
			ED_region_tag_redraw(ar);
			break;
		case NC_BRUSH:
			if(wmn->action==NA_EDITED)
				ED_region_tag_redraw(ar);
			break;
		case NC_SPACE:
			if(wmn->data == ND_SPACE_VIEW3D)
				ED_region_tag_redraw(ar);
			break;
		case NC_ID:
			if(wmn->action == NA_RENAME)
				ED_region_tag_redraw(ar);
			break;
		case NC_SCREEN: 
			if(wmn->data == ND_GPENCIL)
				ED_region_tag_redraw(ar);
			break;
	}
}

/* add handlers, stuff you only do once or on area/region changes */
static void view3d_tools_area_init(wmWindowManager *wm, ARegion *ar)
{
	wmKeyMap *keymap;
	
	ED_region_panels_init(wm, ar);

	keymap= WM_keymap_find(wm->defaultconf, "3D View Generic", SPACE_VIEW3D, 0);
	WM_event_add_keymap_handler(&ar->handlers, keymap);
}

static void view3d_tools_area_draw(const bContext *C, ARegion *ar)
{
	ED_region_panels(C, ar, 1, CTX_data_mode_string(C), -1);
}

static void view3d_props_area_listener(ARegion *ar, wmNotifier *wmn)
{
	/* context changes */
	switch(wmn->category) {
		case NC_WM:
			if(wmn->data == ND_HISTORY)
				ED_region_tag_redraw(ar);
			break;
		case NC_SCENE:
			if(wmn->data == ND_MODE)
				ED_region_tag_redraw(ar);
			break;
		case NC_SPACE:
			if(wmn->data == ND_SPACE_VIEW3D)
				ED_region_tag_redraw(ar);
			break;
	}
}

static int view3d_context(const bContext *C, const char *member, bContextDataResult *result)
{
	View3D *v3d= CTX_wm_view3d(C);
	Scene *scene= CTX_data_scene(C);
	Base *base;
	int lay = v3d ? v3d->lay:scene->lay; /* fallback to the scene layer, allows duplicate and other oject operators to run outside the 3d view */

	if(CTX_data_dir(member)) {
		static const char *dir[] = {
			"selected_objects", "selected_bases", "selected_editable_objects",
			"selected_editable_bases", "visible_objects", "visible_bases", "selectable_objects", "selectable_bases",
			"active_base", "active_object", NULL};

		CTX_data_dir_set(result, dir);
	}
	else if(CTX_data_equals(member, "selected_objects") || CTX_data_equals(member, "selected_bases")) {
		int selected_objects= CTX_data_equals(member, "selected_objects");

		for(base=scene->base.first; base; base=base->next) {
			if((base->flag & SELECT) && (base->lay & lay)) {
				if((base->object->restrictflag & OB_RESTRICT_VIEW)==0) {
					if(selected_objects)
						CTX_data_id_list_add(result, &base->object->id);
					else
						CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
				}
			}
		}
		CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
		return 1;
	}
	else if(CTX_data_equals(member, "selected_editable_objects") || CTX_data_equals(member, "selected_editable_bases")) {
		int selected_editable_objects= CTX_data_equals(member, "selected_editable_objects");

		for(base=scene->base.first; base; base=base->next) {
			if((base->flag & SELECT) && (base->lay & lay)) {
				if((base->object->restrictflag & OB_RESTRICT_VIEW)==0) {
					if(0==object_is_libdata(base->object)) {
						if(selected_editable_objects)
							CTX_data_id_list_add(result, &base->object->id);
						else
							CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
					}
				}
			}
		}
		CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
		return 1;
	}
	else if(CTX_data_equals(member, "visible_objects") || CTX_data_equals(member, "visible_bases")) {
		int visible_objects= CTX_data_equals(member, "visible_objects");

		for(base=scene->base.first; base; base=base->next) {
			if(base->lay & lay) {
				if((base->object->restrictflag & OB_RESTRICT_VIEW)==0) {
					if(visible_objects)
						CTX_data_id_list_add(result, &base->object->id);
					else
						CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
				}
			}
		}
		CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
		return 1;
	}
	else if(CTX_data_equals(member, "selectable_objects") || CTX_data_equals(member, "selectable_bases")) {
		int selectable_objects= CTX_data_equals(member, "selectable_objects");

		for(base=scene->base.first; base; base=base->next) {
			if(base->lay & lay) {
				if((base->object->restrictflag & OB_RESTRICT_VIEW)==0 && (base->object->restrictflag & OB_RESTRICT_SELECT)==0) {
					if(selectable_objects)
						CTX_data_id_list_add(result, &base->object->id);
					else
						CTX_data_list_add(result, &scene->id, &RNA_ObjectBase, base);
				}
			}
		}
		CTX_data_type_set(result, CTX_DATA_TYPE_COLLECTION);
		return 1;
	}
	else if(CTX_data_equals(member, "active_base")) {
		if(scene->basact && (scene->basact->lay & lay))
			if((scene->basact->object->restrictflag & OB_RESTRICT_VIEW)==0)
				CTX_data_pointer_set(result, &scene->id, &RNA_ObjectBase, scene->basact);
		
		return 1;
	}
	else if(CTX_data_equals(member, "active_object")) {
		if(scene->basact && (scene->basact->lay & lay))
			if((scene->basact->object->restrictflag & OB_RESTRICT_VIEW)==0)
				CTX_data_id_pointer_set(result, &scene->basact->object->id);
		
		return 1;
	}
	else {
		return 0; /* not found */
	}

	return -1; /* found but not available */
}

/*area (not region) level listener*/
#if 0 // removed since BKE_image_user_calc_frame is now called in draw_bgpic because screen_ops doesnt call the notifier.
void space_view3d_listener(struct ScrArea *area, struct wmNotifier *wmn)
{
	if (wmn->category == NC_SCENE && wmn->data == ND_FRAME) {
		View3D *v3d = area->spacedata.first;
		BGpic *bgpic = v3d->bgpicbase.first;

		for (; bgpic; bgpic = bgpic->next) {
			if (bgpic->ima) {
				Scene *scene = wmn->reference;
				BKE_image_user_calc_frame(&bgpic->iuser, scene->r.cfra, 0);
			}
		}
	}
}
#endif

/* only called once, from space/spacetypes.c */
void ED_spacetype_view3d(void)
{
	SpaceType *st= MEM_callocN(sizeof(SpaceType), "spacetype view3d");
	ARegionType *art;
	
	st->spaceid= SPACE_VIEW3D;
	strncpy(st->name, "View3D", BKE_ST_MAXNAME);
	
	st->new= view3d_new;
	st->free= view3d_free;
	st->init= view3d_init;
//	st->listener = space_view3d_listener;
	st->duplicate= view3d_duplicate;
	st->operatortypes= view3d_operatortypes;
	st->keymap= view3d_keymap;
	st->dropboxes= view3d_dropboxes;
	st->context= view3d_context;
	
	/* regions: main window */
	art= MEM_callocN(sizeof(ARegionType), "spacetype view3d region");
	art->regionid = RGN_TYPE_WINDOW;
	art->keymapflag= ED_KEYMAP_GPENCIL;
	art->draw= view3d_main_area_draw;
	art->init= view3d_main_area_init;
	art->free= view3d_main_area_free;
	art->duplicate= view3d_main_area_duplicate;
	art->listener= view3d_main_area_listener;
	art->cursor= view3d_main_area_cursor;
	BLI_addhead(&st->regiontypes, art);
	
	/* regions: listview/buttons */
	art= MEM_callocN(sizeof(ARegionType), "spacetype view3d region");
	art->regionid = RGN_TYPE_UI;
	art->prefsizex= 180; // XXX
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
	art->listener= view3d_buttons_area_listener;
	art->init= view3d_buttons_area_init;
	art->draw= view3d_buttons_area_draw;
	BLI_addhead(&st->regiontypes, art);

	view3d_buttons_register(art);

	/* regions: tool(bar) */
	art= MEM_callocN(sizeof(ARegionType), "spacetype view3d region");
	art->regionid = RGN_TYPE_TOOLS;
	art->prefsizex= 160; // XXX
	art->prefsizey= 50; // XXX
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
	art->listener= view3d_buttons_area_listener;
	art->init= view3d_tools_area_init;
	art->draw= view3d_tools_area_draw;
	BLI_addhead(&st->regiontypes, art);
	
#if 0
	/* unfinished still */
	view3d_toolshelf_register(art);
#endif

	/* regions: tool properties */
	art= MEM_callocN(sizeof(ARegionType), "spacetype view3d region");
	art->regionid = RGN_TYPE_TOOL_PROPS;
	art->prefsizex= 0;
	art->prefsizey= 120;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_FRAMES;
	art->listener= view3d_props_area_listener;
	art->init= view3d_tools_area_init;
	art->draw= view3d_tools_area_draw;
	BLI_addhead(&st->regiontypes, art);
	
	view3d_tool_props_register(art);
	
	
	/* regions: header */
	art= MEM_callocN(sizeof(ARegionType), "spacetype view3d region");
	art->regionid = RGN_TYPE_HEADER;
	art->prefsizey= HEADERY;
	art->keymapflag= ED_KEYMAP_UI|ED_KEYMAP_VIEW2D|ED_KEYMAP_FRAMES|ED_KEYMAP_HEADER;
	art->listener= view3d_header_area_listener;
	art->init= view3d_header_area_init;
	art->draw= view3d_header_area_draw;
	BLI_addhead(&st->regiontypes, art);
	
	BKE_spacetype_register(st);
}

