outliner_select.c

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/*
 * ***** 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) 2004 Blender Foundation.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): Joshua Leung
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <math.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>

#include "MEM_guardedalloc.h"

#include "DNA_anim_types.h"
#include "DNA_armature_types.h"
#include "DNA_constraint_types.h"
#include "DNA_camera_types.h"
#include "DNA_group_types.h"
#include "DNA_key_types.h"
#include "DNA_lamp_types.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meta_types.h"
#include "DNA_particle_types.h"
#include "DNA_scene_types.h"
#include "DNA_world_types.h"
#include "DNA_sequence_types.h"
#include "DNA_object_types.h"

#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "BLI_math_base.h"

#if defined WIN32 && !defined _LIBC
# include "BLI_fnmatch.h" /* use fnmatch included in blenlib */
#else
#  ifndef _GNU_SOURCE
#    define _GNU_SOURCE
#  endif
# include <fnmatch.h>
#endif


#include "BKE_animsys.h"
#include "BKE_context.h"
#include "BKE_deform.h"
#include "BKE_depsgraph.h"
#include "BKE_fcurve.h"
#include "BKE_global.h"
#include "BKE_group.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_modifier.h"
#include "BKE_report.h"
#include "BKE_scene.h"
#include "BKE_sequencer.h"

#include "ED_armature.h"
#include "ED_object.h"
#include "ED_screen.h"
#include "ED_util.h"

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

#include "BIF_gl.h"
#include "BIF_glutil.h"

#include "UI_interface.h"
#include "UI_interface_icons.h"
#include "UI_resources.h"
#include "UI_view2d.h"

#include "RNA_access.h"
#include "RNA_define.h"

#include "outliner_intern.h"

/* ****************************************************** */
/* Outliner Selection (grey-blue highlight for rows) */

static int outliner_select(SpaceOops *soops, ListBase *lb, int *index, short *selecting)
{
    TreeElement *te;
    TreeStoreElem *tselem;
    int change= 0;
    
    for (te= lb->first; te && *index >= 0; te=te->next, (*index)--) {
        tselem= TREESTORE(te);
        
        /* if we've encountered the right item, set its 'Outliner' selection status */
        if (*index == 0) {
            /* this should be the last one, so no need to do anything with index */
            if ((te->flag & TE_ICONROW)==0) {
                /* -1 value means toggle testing for now... */
                if (*selecting == -1) {
                    if (tselem->flag & TSE_SELECTED) 
                        *selecting= 0;
                    else 
                        *selecting= 1;
                }
                
                /* set selection */
                if (*selecting) 
                    tselem->flag |= TSE_SELECTED;
                else 
                    tselem->flag &= ~TSE_SELECTED;

                change |= 1;
            }
        }
        else if (TSELEM_OPEN(tselem,soops)) {
            /* Only try selecting sub-elements if we haven't hit the right element yet
             *
             * Hack warning:
             *  Index must be reduced before supplying it to the sub-tree to try to do
             *  selection, however, we need to increment it again for the next loop to 
             *  function correctly
             */
            (*index)--;
            change |= outliner_select(soops, &te->subtree, index, selecting);
            (*index)++;
        }
    }

    return change;
}

/* ****************************************************** */
/* Outliner Element Selection/Activation on Click */

static int tree_element_active_renderlayer(bContext *C, TreeElement *te, TreeStoreElem *tselem, int set)
{
    Scene *sce;
    
    /* paranoia check */
    if(te->idcode!=ID_SCE)
        return 0;
    sce= (Scene *)tselem->id;
    
    if(set) {
        sce->r.actlay= tselem->nr;
        WM_event_add_notifier(C, NC_SCENE|ND_RENDER_OPTIONS, sce);
    }
    else {
        return sce->r.actlay==tselem->nr;
    }
    return 0;
}

static int  tree_element_set_active_object(bContext *C, Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{
    TreeStoreElem *tselem= TREESTORE(te);
    Scene *sce;
    Base *base;
    Object *ob= NULL;
    
    /* if id is not object, we search back */
    if(te->idcode==ID_OB) ob= (Object *)tselem->id;
    else {
        ob= (Object *)outliner_search_back(soops, te, ID_OB);
        if(ob==OBACT) return 0;
    }
    if(ob==NULL) return 0;
    
    sce= (Scene *)outliner_search_back(soops, te, ID_SCE);
    if(sce && scene != sce) {
        ED_screen_set_scene(C, sce);
    }
    
    /* find associated base in current scene */
    base= object_in_scene(ob, scene);

    if(base) {
        if(set==2) {
            /* swap select */
            if(base->flag & SELECT)
                ED_base_object_select(base, BA_DESELECT);
            else 
                ED_base_object_select(base, BA_SELECT);
        }
        else {
            /* deleselect all */
            scene_deselect_all(scene);
            ED_base_object_select(base, BA_SELECT);
        }
        if(C) {
            ED_base_object_activate(C, base); /* adds notifier */
            WM_event_add_notifier(C, NC_SCENE|ND_OB_SELECT, scene);
        }
    }
    
    if(ob!=scene->obedit) 
        ED_object_exit_editmode(C, EM_FREEDATA|EM_FREEUNDO|EM_WAITCURSOR|EM_DO_UNDO);
        
    return 1;
}

static int tree_element_active_material(bContext *C, Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{
    TreeElement *tes;
    Object *ob;
    
    /* we search for the object parent */
    ob= (Object *)outliner_search_back(soops, te, ID_OB);
    // note: ob->matbits can be NULL when a local object points to a library mesh.
    if(ob==NULL || ob!=OBACT || ob->matbits==NULL) return 0;    // just paranoia
    
    /* searching in ob mat array? */
    tes= te->parent;
    if(tes->idcode==ID_OB) {
        if(set) {
            ob->actcol= te->index+1;
            ob->matbits[te->index]= 1;  // make ob material active too
        }
        else {
            if(ob->actcol == te->index+1) 
                if(ob->matbits[te->index]) return 1;
        }
    }
    /* or we search for obdata material */
    else {
        if(set) {
            ob->actcol= te->index+1;
            ob->matbits[te->index]= 0;  // make obdata material active too
        }
        else {
            if(ob->actcol == te->index+1)
                if(ob->matbits[te->index]==0) return 1;
        }
    }
    if(set) {
        WM_event_add_notifier(C, NC_MATERIAL|ND_SHADING, NULL);
    }
    return 0;
}

static int tree_element_active_texture(bContext *C, Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{
    TreeElement *tep;
    TreeStoreElem /* *tselem,*/ *tselemp;
    Object *ob=OBACT;
    SpaceButs *sbuts=NULL;
    
    if(ob==NULL) return 0; // no active object
    
    /*tselem= TREESTORE(te);*/ /*UNUSED*/
    
    /* find buttons area (note, this is undefined really still, needs recode in blender) */
    /* XXX removed finding sbuts */
    
    /* where is texture linked to? */
    tep= te->parent;
    tselemp= TREESTORE(tep);
    
    if(tep->idcode==ID_WO) {
        World *wrld= (World *)tselemp->id;

        if(set) {
            if(sbuts) {
                // XXX sbuts->tabo= TAB_SHADING_TEX;    // hack from header_buttonswin.c
                // XXX sbuts->texfrom= 1;
            }
// XXX          extern_set_butspace(F6KEY, 0);  // force shading buttons texture
            wrld->texact= te->index;
        }
        else if(tselemp->id == (ID *)(scene->world)) {
            if(wrld->texact==te->index) return 1;
        }
    }
    else if(tep->idcode==ID_LA) {
        Lamp *la= (Lamp *)tselemp->id;
        if(set) {
            if(sbuts) {
                // XXX sbuts->tabo= TAB_SHADING_TEX;    // hack from header_buttonswin.c
                // XXX sbuts->texfrom= 2;
            }
// XXX          extern_set_butspace(F6KEY, 0);  // force shading buttons texture
            la->texact= te->index;
        }
        else {
            if(tselemp->id == ob->data) {
                if(la->texact==te->index) return 1;
            }
        }
    }
    else if(tep->idcode==ID_MA) {
        Material *ma= (Material *)tselemp->id;
        if(set) {
            if(sbuts) {
                //sbuts->tabo= TAB_SHADING_TEX; // hack from header_buttonswin.c
                // XXX sbuts->texfrom= 0;
            }
// XXX          extern_set_butspace(F6KEY, 0);  // force shading buttons texture
            ma->texact= (char)te->index;
            
            /* also set active material */
            ob->actcol= tep->index+1;
        }
        else if(tep->flag & TE_ACTIVE) {    // this is active material
            if(ma->texact==te->index) return 1;
        }
    }
    
    if(set)
        WM_event_add_notifier(C, NC_TEXTURE, NULL);

    return 0;
}


static int tree_element_active_lamp(bContext *UNUSED(C), Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{
    Object *ob;
    
    /* we search for the object parent */
    ob= (Object *)outliner_search_back(soops, te, ID_OB);
    if(ob==NULL || ob!=OBACT) return 0; // just paranoia
    
    if(set) {
// XXX      extern_set_butspace(F5KEY, 0);
    }
    else return 1;
    
    return 0;
}

static int tree_element_active_camera(bContext *UNUSED(C), Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{
    Object *ob= (Object *)outliner_search_back(soops, te, ID_OB);

    if(set)
        return 0;

    return scene->camera == ob;
}

static int tree_element_active_world(bContext *C, Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{
    TreeElement *tep;
    TreeStoreElem *tselem=NULL;
    Scene *sce=NULL;
    
    tep= te->parent;
    if(tep) {
        tselem= TREESTORE(tep);
        sce= (Scene *)tselem->id;
    }
    
    if(set) {   // make new scene active
        if(sce && scene != sce) {
            ED_screen_set_scene(C, sce);
        }
    }
    
    if(tep==NULL || tselem->id == (ID *)scene) {
        if(set) {
// XXX          extern_set_butspace(F8KEY, 0);
        }
        else {
            return 1;
        }
    }
    return 0;
}

static int tree_element_active_defgroup(bContext *C, Scene *scene, TreeElement *te, TreeStoreElem *tselem, int set)
{
    Object *ob;
    
    /* id in tselem is object */
    ob= (Object *)tselem->id;
    if(set) {
        BLI_assert(te->index+1 >= 0);
        ob->actdef= te->index+1;

        DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
        WM_event_add_notifier(C, NC_OBJECT|ND_TRANSFORM, ob);
    }
    else {
        if(ob==OBACT)
            if(ob->actdef== te->index+1) return 1;
    }
    return 0;
}

static int tree_element_active_posegroup(bContext *C, Scene *scene, TreeElement *te, TreeStoreElem *tselem, int set)
{
    Object *ob= (Object *)tselem->id;
    
    if(set) {
        if (ob->pose) {
            ob->pose->active_group= te->index+1;
            WM_event_add_notifier(C, NC_OBJECT|ND_DRAW, ob);
        }
    }
    else {
        if(ob==OBACT && ob->pose) {
            if (ob->pose->active_group== te->index+1) return 1;
        }
    }
    return 0;
}

static int tree_element_active_posechannel(bContext *C, Scene *scene, TreeElement *te, TreeStoreElem *tselem, int set)
{
    Object *ob= (Object *)tselem->id;
    bArmature *arm= ob->data;
    bPoseChannel *pchan= te->directdata;
    
    if(set) {
        if(!(pchan->bone->flag & BONE_HIDDEN_P)) {
            
            if(set==2) ED_pose_deselectall(ob, 2);  // 2 = clear active tag
            else ED_pose_deselectall(ob, 0);    // 0 = deselect 
            
            if(set==2 && (pchan->bone->flag & BONE_SELECTED)) {
                pchan->bone->flag &= ~BONE_SELECTED;
            } else {
                pchan->bone->flag |= BONE_SELECTED;
                arm->act_bone= pchan->bone;
            }
            
            WM_event_add_notifier(C, NC_OBJECT|ND_BONE_ACTIVE, ob);

        }
    }
    else {
        if(ob==OBACT && ob->pose) {
            if (pchan->bone->flag & BONE_SELECTED) return 1;
        }
    }
    return 0;
}

static int tree_element_active_bone(bContext *C, Scene *scene, TreeElement *te, TreeStoreElem *tselem, int set)
{
    bArmature *arm= (bArmature *)tselem->id;
    Bone *bone= te->directdata;
    
    if(set) {
        if(!(bone->flag & BONE_HIDDEN_P)) {
            if(set==2) ED_pose_deselectall(OBACT, 2);   // 2 is clear active tag
            else ED_pose_deselectall(OBACT, 0);
            
            if(set==2 && (bone->flag & BONE_SELECTED)) {
                bone->flag &= ~BONE_SELECTED;
            } else {
                bone->flag |= BONE_SELECTED;
                arm->act_bone= bone;
            }
            
            WM_event_add_notifier(C, NC_OBJECT|ND_BONE_ACTIVE, OBACT);
        }
    }
    else {
        Object *ob= OBACT;
        
        if(ob && ob->data==arm) {
            if (bone->flag & BONE_SELECTED) return 1;
        }
    }
    return 0;
}


/* ebones only draw in editmode armature */
static void tree_element_active_ebone__sel(bContext *C, Scene *scene, bArmature *arm, EditBone *ebone, short sel)
{
    if(sel) {
        ebone->flag |= BONE_SELECTED|BONE_ROOTSEL|BONE_TIPSEL;
        arm->act_edbone= ebone;
        // flush to parent?
        if(ebone->parent && (ebone->flag & BONE_CONNECTED)) ebone->parent->flag |= BONE_TIPSEL;
    }
    else {
        ebone->flag &= ~(BONE_SELECTED|BONE_ROOTSEL|BONE_TIPSEL);
        // flush to parent?
        if(ebone->parent && (ebone->flag & BONE_CONNECTED)) ebone->parent->flag &= ~BONE_TIPSEL;
    }

    WM_event_add_notifier(C, NC_OBJECT|ND_BONE_ACTIVE, scene->obedit);
}
static int tree_element_active_ebone(bContext *C, Scene *scene, TreeElement *te, TreeStoreElem *UNUSED(tselem), int set)
{
    bArmature *arm= scene->obedit->data;
    EditBone *ebone= te->directdata;

    if(set==1) {
        if(!(ebone->flag & BONE_HIDDEN_A)) {
            ED_armature_deselect_all(scene->obedit, 0); // deselect
            tree_element_active_ebone__sel(C, scene, arm, ebone, TRUE);
            return 1;
        }
    }
    else if (set==2) {
        if(!(ebone->flag & BONE_HIDDEN_A)) {
            if(!(ebone->flag & BONE_SELECTED)) {
                tree_element_active_ebone__sel(C, scene, arm, ebone, TRUE);
                return 1;
            }
            else {
                /* entirely selected, so de-select */
                tree_element_active_ebone__sel(C, scene, arm, ebone, FALSE);
                return 0;
            }
        }
    }
    else if (ebone->flag & BONE_SELECTED) {
        return 1;
    }
    return 0;
}

static int tree_element_active_modifier(bContext *C, TreeElement *UNUSED(te), TreeStoreElem *tselem, int set)
{
    if(set) {
        Object *ob= (Object *)tselem->id;
        
        WM_event_add_notifier(C, NC_OBJECT|ND_MODIFIER, ob);

// XXX      extern_set_butspace(F9KEY, 0);
    }
    
    return 0;
}

static int tree_element_active_psys(bContext *C, Scene *UNUSED(scene), TreeElement *UNUSED(te), TreeStoreElem *tselem, int set)
{
    if(set) {
        Object *ob= (Object *)tselem->id;
        
        WM_event_add_notifier(C, NC_OBJECT|ND_PARTICLE|NA_EDITED, ob);
        
// XXX      extern_set_butspace(F7KEY, 0);
    }
    
    return 0;
}

static int tree_element_active_constraint(bContext *C, TreeElement *UNUSED(te), TreeStoreElem *tselem, int set)
{
    if(set) {
        Object *ob= (Object *)tselem->id;
        
        WM_event_add_notifier(C, NC_OBJECT|ND_CONSTRAINT, ob);
// XXX      extern_set_butspace(F7KEY, 0);
    }
    
    return 0;
}

static int tree_element_active_text(bContext *UNUSED(C), Scene *UNUSED(scene), SpaceOops *UNUSED(soops), TreeElement *UNUSED(te), int UNUSED(set))
{
    // XXX removed
    return 0;
}

static int tree_element_active_pose(bContext *C, Scene *scene, TreeElement *UNUSED(te), TreeStoreElem *tselem, int set)
{
    Object *ob= (Object *)tselem->id;
    Base *base= object_in_scene(ob, scene);
    
    if(set) {
        if(scene->obedit) 
            ED_object_exit_editmode(C, EM_FREEDATA|EM_FREEUNDO|EM_WAITCURSOR|EM_DO_UNDO);
        
        if(ob->mode & OB_MODE_POSE) 
            ED_armature_exit_posemode(C, base);
        else 
            ED_armature_enter_posemode(C, base);
    }
    else {
        if(ob->mode & OB_MODE_POSE) return 1;
    }
    return 0;
}

static int tree_element_active_sequence(TreeElement *te, TreeStoreElem *UNUSED(tselem), int set)
{
    Sequence *seq= (Sequence*) te->directdata;

    if(set) {
// XXX      select_single_seq(seq, 1);
    }
    else {
        if(seq->flag & SELECT)
            return(1);
    }
    return(0);
}

static int tree_element_active_sequence_dup(Scene *scene, TreeElement *te, TreeStoreElem *UNUSED(tselem), int set)
{
    Sequence *seq, *p;
    Editing *ed= seq_give_editing(scene, FALSE);

    seq= (Sequence*)te->directdata;
    if(set==0) {
        if(seq->flag & SELECT)
            return(1);
        return(0);
    }

// XXX  select_single_seq(seq, 1);
    p= ed->seqbasep->first;
    while(p) {
        if((!p->strip) || (!p->strip->stripdata) || (!p->strip->stripdata->name)) {
            p= p->next;
            continue;
        }

//      if(!strcmp(p->strip->stripdata->name, seq->strip->stripdata->name))
// XXX          select_single_seq(p, 0);
        p= p->next;
    }
    return(0);
}

static int tree_element_active_keymap_item(bContext *UNUSED(C), TreeElement *te, TreeStoreElem *UNUSED(tselem), int set)
{
    wmKeyMapItem *kmi= te->directdata;
    
    if(set==0) {
        if(kmi->flag & KMI_INACTIVE) return 0;
        return 1;
    }
    else {
        kmi->flag ^= KMI_INACTIVE;
    }
    return 0;
}

/* ---------------------------------------------- */

/* generic call for ID data check or make/check active in UI */
int tree_element_active(bContext *C, Scene *scene, SpaceOops *soops, TreeElement *te, int set)
{

    switch(te->idcode) {
        /* Note: no ID_OB: objects are handled specially to allow multiple
           selection. See do_outliner_item_activate. */
        case ID_MA:
            return tree_element_active_material(C, scene, soops, te, set);
        case ID_WO:
            return tree_element_active_world(C, scene, soops, te, set);
        case ID_LA:
            return tree_element_active_lamp(C, scene, soops, te, set);
        case ID_TE:
            return tree_element_active_texture(C, scene, soops, te, set);
        case ID_TXT:
            return tree_element_active_text(C, scene, soops, te, set);
        case ID_CA:
            return tree_element_active_camera(C, scene, soops, te, set);
    }
    return 0;
}

/* generic call for non-id data to make/check active in UI */
/* Context can be NULL when set==0 */
int tree_element_type_active(bContext *C, Scene *scene, SpaceOops *soops, TreeElement *te, TreeStoreElem *tselem, int set)
{
    switch(tselem->type) {
        case TSE_DEFGROUP:
            return tree_element_active_defgroup(C, scene, te, tselem, set);
        case TSE_BONE:
            return tree_element_active_bone(C, scene, te, tselem, set);
        case TSE_EBONE:
            return tree_element_active_ebone(C, scene, te, tselem, set);
        case TSE_MODIFIER:
            return tree_element_active_modifier(C, te, tselem, set);
        case TSE_LINKED_OB:
            if(set) tree_element_set_active_object(C, scene, soops, te, set);
            else if(tselem->id==(ID *)OBACT) return 1;
            break;
        case TSE_LINKED_PSYS:
            return tree_element_active_psys(C, scene, te, tselem, set);
        case TSE_POSE_BASE:
            return tree_element_active_pose(C, scene, te, tselem, set);
        case TSE_POSE_CHANNEL:
            return tree_element_active_posechannel(C, scene, te, tselem, set);
        case TSE_CONSTRAINT:
            return tree_element_active_constraint(C, te, tselem, set);
        case TSE_R_LAYER:
            return tree_element_active_renderlayer(C, te, tselem, set);
        case TSE_POSEGRP:
            return tree_element_active_posegroup(C, scene, te, tselem, set);
        case TSE_SEQUENCE:
            return tree_element_active_sequence(te, tselem, set);
        case TSE_SEQUENCE_DUP:
            return tree_element_active_sequence_dup(scene, te, tselem, set);
        case TSE_KEYMAP_ITEM:
            return tree_element_active_keymap_item(C, te, tselem, set);
            
    }
    return 0;
}

/* ================================================ */

static int do_outliner_item_activate(bContext *C, Scene *scene, ARegion *ar, SpaceOops *soops, TreeElement *te, int extend, const float mval[2])
{
    
    if(mval[1]>te->ys && mval[1]<te->ys+UI_UNIT_Y) {
        TreeStoreElem *tselem= TREESTORE(te);
        int openclose= 0;
        
        /* open close icon */
        if((te->flag & TE_ICONROW)==0) {                // hidden icon, no open/close
            if( mval[0]>te->xs && mval[0]<te->xs+UI_UNIT_X) 
                openclose= 1;
        }
        
        if(openclose) {
            /* all below close/open? */
            if(extend) {
                tselem->flag &= ~TSE_CLOSED;
                outliner_set_flag(soops, &te->subtree, TSE_CLOSED, !outliner_has_one_flag(soops, &te->subtree, TSE_CLOSED, 1));
            }
            else {
                if(tselem->flag & TSE_CLOSED) tselem->flag &= ~TSE_CLOSED;
                else tselem->flag |= TSE_CLOSED;
                
            }
            
            return 1;
        }
        /* name and first icon */
        else if(mval[0]>te->xs+UI_UNIT_X && mval[0]<te->xend) {
            
            /* always makes active object */
            if(tselem->type!=TSE_SEQUENCE && tselem->type!=TSE_SEQ_STRIP && tselem->type!=TSE_SEQUENCE_DUP)
                tree_element_set_active_object(C, scene, soops, te, 1 + (extend!=0 && tselem->type==0));
            
            if(tselem->type==0) { // the lib blocks
                /* editmode? */
                if(te->idcode==ID_SCE) {
                    if(scene!=(Scene *)tselem->id) {
                        ED_screen_set_scene(C, (Scene *)tselem->id);
                    }
                }
                else if(te->idcode==ID_GR) {
                    Group *gr= (Group *)tselem->id;
                    GroupObject *gob;
                    
                    if(extend) {
                        int sel= BA_SELECT;
                        for(gob= gr->gobject.first; gob; gob= gob->next) {
                            if(gob->ob->flag & SELECT) {
                                sel= BA_DESELECT;
                                break;
                            }
                        }
                        
                        for(gob= gr->gobject.first; gob; gob= gob->next) {
                            ED_base_object_select(object_in_scene(gob->ob, scene), sel);
                        }
                    }
                    else {
                        scene_deselect_all(scene);
                        
                        for(gob= gr->gobject.first; gob; gob= gob->next) {
                            if((gob->ob->flag & SELECT) == 0)
                                ED_base_object_select(object_in_scene(gob->ob, scene), BA_SELECT);
                        }
                    }
                    
                    WM_event_add_notifier(C, NC_SCENE|ND_OB_SELECT, scene);
                }
                else if(ELEM5(te->idcode, ID_ME, ID_CU, ID_MB, ID_LT, ID_AR)) {
                    WM_operator_name_call(C, "OBJECT_OT_editmode_toggle", WM_OP_INVOKE_REGION_WIN, NULL);
                } else {    // rest of types
                    tree_element_active(C, scene, soops, te, 1);
                }
                
            }
            else tree_element_type_active(C, scene, soops, te, tselem, 1+(extend!=0));
            
            return 1;
        }
    }
    
    for(te= te->subtree.first; te; te= te->next) {
        if(do_outliner_item_activate(C, scene, ar, soops, te, extend, mval)) return 1;
    }
    return 0;
}

/* event can enterkey, then it opens/closes */
static int outliner_item_activate(bContext *C, wmOperator *op, wmEvent *event)
{
    Scene *scene= CTX_data_scene(C);
    ARegion *ar= CTX_wm_region(C);
    SpaceOops *soops= CTX_wm_space_outliner(C);
    TreeElement *te;
    float fmval[2];
    int extend= RNA_boolean_get(op->ptr, "extend");

    UI_view2d_region_to_view(&ar->v2d, event->mval[0], event->mval[1], fmval, fmval+1);

    if ( !ELEM3(soops->outlinevis, SO_DATABLOCKS, SO_USERDEF, SO_KEYMAP) &&
         !(soops->flag & SO_HIDE_RESTRICTCOLS) &&
         (fmval[0] > ar->v2d.cur.xmax - OL_TOG_RESTRICT_VIEWX))
    {
        return OPERATOR_CANCELLED;
    }

    for(te= soops->tree.first; te; te= te->next) {
        if(do_outliner_item_activate(C, scene, ar, soops, te, extend, fmval)) break;
    }
    
    if(te) {
        ED_undo_push(C, "Outliner click event");
    }
    else {
        short selecting= -1;
        int row;
        
        /* get row number - 100 here is just a dummy value since we don't need the column */
        UI_view2d_listview_view_to_cell(&ar->v2d, 1000, UI_UNIT_Y, 0.0f, OL_Y_OFFSET, 
                        fmval[0], fmval[1], NULL, &row);
        
        /* select relevant row */
        if(outliner_select(soops, &soops->tree, &row, &selecting)) {
        
            soops->storeflag |= SO_TREESTORE_REDRAW;
        
            /* no need for undo push here, only changing outliner data which is
             * scene level - campbell */
            /* ED_undo_push(C, "Outliner selection event"); */
        }
    }
    
    ED_region_tag_redraw(ar);

    return OPERATOR_FINISHED;
}

void OUTLINER_OT_item_activate(wmOperatorType *ot)
{
    ot->name= "Activate Item";
    ot->idname= "OUTLINER_OT_item_activate";
    ot->description= "Handle mouse clicks to activate/select items";
    
    ot->invoke= outliner_item_activate;
    
    ot->poll= ED_operator_outliner_active;
    
    RNA_def_boolean(ot->srna, "extend", 1, "Extend", "Extend selection for activation");
}

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