virtualx-engine/tools/editor/editor_data.cpp

/*************************************************************************/
/*  editor_data.cpp                                                      */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "editor_data.h"
#include "globals.h"
#include "editor_settings.h"
#include "os/dir_access.h"
#include "io/resource_loader.h"
#include "scene/resources/packed_scene.h"
#include "os/file_access.h"
#include "editor_node.h"

void EditorHistory::_cleanup_history() {

	for(int i=0;i<history.size();i++) {

		bool fail=false;

		for(int j=0;j<history[i].path.size();j++) {
			if (!history[i].path[j].ref.is_null())
				continue;

			if (ObjectDB::get_instance(history[i].path[j].object))
				continue; //has isntance, try next

			if (j<=history[i].level) {
				//before or equal level, complete fail
				fail=true;
			} else {
				//after level, clip
				history[i].path.resize(j);
			}

			break;
		}

		if (fail) {
			history.remove(i);
			i--;
		}
	}

	if (current>=history.size())
		current=history.size()-1;
}

void EditorHistory::_add_object(ObjectID p_object,const String& p_property,int p_level_change) {

	Object *obj = ObjectDB::get_instance(p_object);
	ERR_FAIL_COND(!obj);
	Reference *r = obj->cast_to<Reference>();
	Obj o;
	if (r)
		o.ref=REF(r);
	o.object=p_object;
	o.property=p_property;

	History h;

	bool has_prev = current>=0 && current<history.size();

	if (has_prev) {
		history.resize(current+1); //clip history to next
	}

	if (p_property!="" && has_prev) {
		//add a sub property
		History &pr = history[current];
		h=pr;
		h.path.resize(h.level+1);
		h.path.push_back(o);
		h.level++;
	} else if (p_level_change!=-1 && has_prev) {
		//add a sub property
		History &pr = history[current];
		h=pr;
		ERR_FAIL_INDEX(p_level_change,h.path.size());
		h.level=p_level_change;
	} else {
		//add a new node
		h.path.push_back(o);
		h.level=0;
	}

	history.push_back(h);
	current++;
}

void EditorHistory::add_object(ObjectID p_object) {

	_add_object(p_object,"",-1);
}

void EditorHistory::add_object(ObjectID p_object,const String& p_subprop) {

	_add_object(p_object,p_subprop,-1);
}

void EditorHistory::add_object(ObjectID p_object,int p_relevel){

	_add_object(p_object,"",p_relevel);
}

int EditorHistory::get_history_len() {
	return history.size();
}
int EditorHistory::get_history_pos() {
	return current;
}

ObjectID EditorHistory::get_history_obj(int p_obj) const {
	ERR_FAIL_INDEX_V(p_obj,history.size(),0);
	ERR_FAIL_INDEX_V(history[p_obj].level,history[p_obj].path.size(),0);
	return history[p_obj].path[history[p_obj].level].object;
}

bool EditorHistory::is_at_begining() const {
	return current<=0;
}
bool EditorHistory::is_at_end() const {

	return ((current+1)>=history.size());
}


bool EditorHistory::next() {


	_cleanup_history();

	if ((current+1)<history.size())
		current++;
	else
		return false;

	return true;
}

bool EditorHistory::previous() {


	_cleanup_history();

	if (current>0)
		current--;
	else
		return false;

	return true;
}

ObjectID EditorHistory::get_current() {


	if (current<0 || current >=history.size())
		return 0;

	History &h=history[current];
	Object *obj = ObjectDB::get_instance(h.path[h.level].object);
	if (!obj)
		return 0;

	return obj->get_instance_ID();
}

int EditorHistory::get_path_size() const {

	if (current<0 || current >=history.size())
		return 0;

	const History &h=history[current];
	return h.path.size();

}

ObjectID EditorHistory::get_path_object(int p_index) const {

	if (current<0 || current >=history.size())
		return 0;

	const History &h=history[current];

	ERR_FAIL_INDEX_V(p_index,h.path.size(),0);

	Object *obj = ObjectDB::get_instance(h.path[p_index].object);
	if (!obj)
		return 0;

	return obj->get_instance_ID();
}

String EditorHistory::get_path_property(int p_index) const {

	if (current<0 || current >=history.size())
		return "";

	const History &h=history[current];

	ERR_FAIL_INDEX_V(p_index,h.path.size(),"");

	return h.path[p_index].property;

}

void EditorHistory::clear() {

	history.clear();
	current=-1;
}

EditorHistory::EditorHistory() {

	current=-1;
}

EditorPlugin* EditorData::get_editor(Object *p_object) {

	for (int i=0;i<editor_plugins.size();i++) {

		if (editor_plugins[i]->has_main_screen() && editor_plugins[i]->handles(p_object))
			return editor_plugins[i];
	}

	return NULL;
}

EditorPlugin* EditorData::get_subeditor(Object *p_object) {

	for (int i=0;i<editor_plugins.size();i++) {

		if (!editor_plugins[i]->has_main_screen() && editor_plugins[i]->handles(p_object))
			return editor_plugins[i];
	}

	return NULL;
}

Vector<EditorPlugin*> EditorData::get_subeditors(Object* p_object) {
	Vector<EditorPlugin*> sub_plugins;
	for (int i = 0; i < editor_plugins.size(); i++) {
		if (!editor_plugins[i]->has_main_screen() && editor_plugins[i]->handles(p_object)) {
			sub_plugins.push_back(editor_plugins[i]);
		}
	}
	return sub_plugins;
}

EditorPlugin* EditorData::get_editor(String p_name) {

	for(int i=0;i<editor_plugins.size();i++) {

		if (editor_plugins[i]->get_name()==p_name)
			return editor_plugins[i];
	}

	return NULL;
}

void EditorData::copy_object_params(Object *p_object) {

	clipboard.clear();

	List<PropertyInfo> pinfo;
	p_object->get_property_list(&pinfo);

	for( List<PropertyInfo>::Element *E=pinfo.front();E;E=E->next()) {

		if (!(E->get().usage&PROPERTY_USAGE_EDITOR))
			continue;

		PropertyData pd;
		pd.name=E->get().name;
		pd.value=p_object->get(pd.name);
		clipboard.push_back(pd);
	}
}

void EditorData::get_editor_breakpoints(List<String> *p_breakpoints) {


	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->get_breakpoints(p_breakpoints);
	}


}

Dictionary EditorData::get_editor_states() const {

	Dictionary metadata;
	for(int i=0;i<editor_plugins.size();i++) {

		Dictionary state=editor_plugins[i]->get_state();
		if (state.empty())
			continue;
		metadata[editor_plugins[i]->get_name()]=state;
	}

	return metadata;

}

Dictionary EditorData::get_scene_editor_states(int p_idx) const
{
	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),Dictionary());
	EditedScene es = edited_scene[p_idx];
	return es.editor_states;
}

void EditorData::set_editor_states(const Dictionary& p_states) {

	List<Variant> keys;
	p_states.get_key_list(&keys);

	List<Variant>::Element *E=keys.front();
	for(;E;E=E->next()) {

		String name = E->get();
		int idx=-1;
		for(int i=0;i<editor_plugins.size();i++) {

			if (editor_plugins[i]->get_name()==name) {
				idx=i;
				break;
			}
		}

		if (idx==-1)
			continue;
		editor_plugins[idx]->set_state(p_states[name]);
	}

}

void EditorData::notify_edited_scene_changed() {

	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->edited_scene_changed();
	}
}

void EditorData::clear_editor_states() {

	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->clear();
	}

}

void EditorData::save_editor_external_data() {

	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->save_external_data();
	}
}

void EditorData::apply_changes_in_editors() {

	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->apply_changes();
	}

}

void EditorData::save_editor_global_states() {

	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->save_global_state();
	}
}

void EditorData::restore_editor_global_states(){

	for(int i=0;i<editor_plugins.size();i++) {

		editor_plugins[i]->restore_global_state();
	}

}


void EditorData::paste_object_params(Object *p_object) {


	for( List<PropertyData>::Element *E=clipboard.front();E;E=E->next()) {

		p_object->set( E->get().name, E->get().value);
	}

}


UndoRedo &EditorData::get_undo_redo() {

	return undo_redo;
}

void EditorData::remove_editor_plugin(EditorPlugin *p_plugin) {

	p_plugin->undo_redo=NULL;
	editor_plugins.erase(p_plugin);

}

void EditorData::add_editor_plugin(EditorPlugin *p_plugin) {

	p_plugin->undo_redo=&undo_redo;
	editor_plugins.push_back(p_plugin);
}

int EditorData::get_editor_plugin_count() const {
	return editor_plugins.size();
}
EditorPlugin *EditorData::get_editor_plugin(int p_idx) {

	ERR_FAIL_INDEX_V(p_idx,editor_plugins.size(),NULL);
	return editor_plugins[p_idx];
}


void EditorData::add_custom_type(const String& p_type, const String& p_inherits,const Ref<Script>& p_script,const Ref<Texture>& p_icon ) {

	ERR_FAIL_COND(p_script.is_null());
	CustomType ct;
	ct.name=p_type;
	ct.icon=p_icon;
	ct.script=p_script;
	if (!custom_types.has(p_inherits)) {
		custom_types[p_inherits]=Vector<CustomType>();
	}

	custom_types[p_inherits].push_back(ct);
}

void EditorData::remove_custom_type(const String& p_type){


	for (Map<String,Vector<CustomType> >::Element *E=custom_types.front();E;E=E->next()) {

		for(int i=0;i<E->get().size();i++) {
			if (E->get()[i].name==p_type) {
				E->get().remove(i);
				if (E->get().empty()) {
					custom_types.erase(E->key());
				}
				return;
			}
		}
	}

}

int EditorData::add_edited_scene(int p_at_pos) {

	if (p_at_pos<0)
		p_at_pos=edited_scene.size();
	EditedScene es;
	es.root=NULL;
	es.history_current=-1;
	es.version=0;
	es.live_edit_root=NodePath(String("/root"));

	if (p_at_pos==edited_scene.size())
		edited_scene.push_back(es);
	else
		edited_scene.insert(p_at_pos,es);

	if (current_edited_scene<0)
		current_edited_scene=0;
	return p_at_pos;
}

void EditorData::move_edited_scene_index(int p_idx,int p_to_idx){

	ERR_FAIL_INDEX(p_idx,edited_scene.size());
	ERR_FAIL_INDEX(p_to_idx,edited_scene.size());
	SWAP(edited_scene[p_idx],edited_scene[p_to_idx]);
}
void EditorData::remove_scene(int p_idx){
	ERR_FAIL_INDEX(p_idx,edited_scene.size());
	if (edited_scene[p_idx].root)
		memdelete(edited_scene[p_idx].root);

	if (current_edited_scene>p_idx)
		current_edited_scene--;
	else if (current_edited_scene==p_idx && current_edited_scene>0) {
		current_edited_scene--;
	}

	edited_scene.remove(p_idx);

}

bool EditorData::_find_updated_instances(Node* p_root,Node *p_node,Set<String> &checked_paths) {

//	if (p_root!=p_node && p_node->get_owner()!=p_root && !p_root->is_editable_instance(p_node->get_owner()))
//		return false;

	Ref<SceneState> ss;

	if (p_node==p_root) {
		ss=p_node->get_scene_inherited_state();
	} else if (p_node->get_filename()!=String()){
		ss=p_node->get_scene_instance_state();
	}

	if (ss.is_valid()) {
		String path = ss->get_path();

		if (!checked_paths.has(path)) {

			uint64_t modified_time = FileAccess::get_modified_time(path);
			if (modified_time!=ss->get_last_modified_time()) {
				return true; //external scene changed
			}

			checked_paths.insert(path);
		}

	}

	for(int i=0;i<p_node->get_child_count();i++) {

		bool found = _find_updated_instances(p_root,p_node->get_child(i),checked_paths);
		if (found)
			return true;
	}

	return false;
}


bool EditorData::check_and_update_scene(int p_idx) {

	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),false);
	if (!edited_scene[p_idx].root)
		return false;

	Set<String> checked_scenes;


	bool must_reload = _find_updated_instances(edited_scene[p_idx].root,edited_scene[p_idx].root,checked_scenes);

	print_line("MUST RELOAD? "+itos(must_reload));

	if (must_reload) {
		Ref<PackedScene> pscene;
		pscene.instance();

		EditorProgress ep("update_scene",TTR("Updating Scene"),2);
		ep.step(TTR("Storing local changes.."),0);
		//pack first, so it stores diffs to previous version of saved scene
		Error err = pscene->pack(edited_scene[p_idx].root);
		ERR_FAIL_COND_V(err!=OK,false);
		ep.step(TTR("Updating scene.."),1);
		Node *new_scene = pscene->instance(true);
		ERR_FAIL_COND_V(!new_scene,false);

		//transfer selection
		List<Node*> new_selection;
		for (List<Node*>::Element *E=edited_scene[p_idx].selection.front();E;E=E->next()) {
			NodePath p = edited_scene[p_idx].root->get_path_to(E->get());
			Node *new_node = new_scene->get_node(p);
			if (new_node)
				new_selection.push_back(new_node);
		}

		new_scene->set_filename( edited_scene[p_idx].root->get_filename() );

		memdelete(edited_scene[p_idx].root);
		edited_scene[p_idx].root=new_scene;
		edited_scene[p_idx].selection=new_selection;

		return true;

	}

	return false;

}

int EditorData::get_edited_scene() const {

	return current_edited_scene;
}
void EditorData::set_edited_scene(int p_idx){

	ERR_FAIL_INDEX(p_idx,edited_scene.size());
	current_edited_scene=p_idx;
	//swap
}
Node* EditorData::get_edited_scene_root(int p_idx){
	if (p_idx < 0) {
		ERR_FAIL_INDEX_V(current_edited_scene,edited_scene.size(),NULL);
		return edited_scene[current_edited_scene].root;
	} else {
		ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),NULL);
		return edited_scene[p_idx].root;
	}
}
void EditorData::set_edited_scene_root(Node* p_root) {

	ERR_FAIL_INDEX(current_edited_scene,edited_scene.size());
	edited_scene[current_edited_scene].root=p_root;
}

int EditorData::get_edited_scene_count() const {

	return edited_scene.size();
}

void EditorData::set_edited_scene_version(uint64_t version, int scene_idx) {
	ERR_FAIL_INDEX(current_edited_scene,edited_scene.size());
	if (scene_idx < 0) {
		edited_scene[current_edited_scene].version=version;
	} else {
		ERR_FAIL_INDEX(scene_idx,edited_scene.size());
		edited_scene[scene_idx].version=version;
	}

}

uint64_t EditorData::get_edited_scene_version() const{

	ERR_FAIL_INDEX_V(current_edited_scene,edited_scene.size(),0);
	return edited_scene[current_edited_scene].version;

}
uint64_t EditorData::get_scene_version(int p_idx) const{
	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),false);
	return edited_scene[p_idx].version;
}

String EditorData::get_scene_type(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),String());
	if (!edited_scene[p_idx].root)
		return "";
	return edited_scene[p_idx].root->get_type();

}
void EditorData::move_edited_scene_to_index(int p_idx) {

	ERR_FAIL_INDEX(current_edited_scene,edited_scene.size());
	ERR_FAIL_INDEX(p_idx,edited_scene.size());

	EditedScene es=edited_scene[current_edited_scene];
	edited_scene.remove(current_edited_scene);
	edited_scene.insert(p_idx,es);
	current_edited_scene=p_idx;
}

Ref<Script> EditorData::get_scene_root_script(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),Ref<Script>());
	if (!edited_scene[p_idx].root)
		return Ref<Script>();
	Ref<Script> s=edited_scene[p_idx].root->get_script();
	if (!s.is_valid() && edited_scene[p_idx].root->get_child_count()) {
		Node *n = edited_scene[p_idx].root->get_child(0);
		while(!s.is_valid() && n && n->get_filename()==String()) {
			s=n->get_script();
			n=n->get_parent();
		}
	}
	return s;
}

String EditorData::get_scene_title(int p_idx) const {
	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),String());
	if (!edited_scene[p_idx].root)
		return "[empty]";
	if (edited_scene[p_idx].root->get_filename()=="")
		return "[unsaved]";
	return edited_scene[p_idx].root->get_filename().get_file();
}


String EditorData::get_scene_path(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,edited_scene.size(),String());

	if (!edited_scene[p_idx].root)
		return "";
	return edited_scene[p_idx].root->get_filename();

}

void EditorData::set_edited_scene_live_edit_root(const NodePath& p_root) {
	ERR_FAIL_INDEX(current_edited_scene,edited_scene.size());

	edited_scene[current_edited_scene].live_edit_root=p_root;

}
NodePath EditorData::get_edited_scene_live_edit_root() {

	ERR_FAIL_INDEX_V(current_edited_scene,edited_scene.size(),String());

	return edited_scene[current_edited_scene].live_edit_root;



}


void EditorData::save_edited_scene_state(EditorSelection *p_selection, EditorHistory *p_history, const Dictionary& p_custom) {

	ERR_FAIL_INDEX(current_edited_scene,edited_scene.size());

	EditedScene &es=edited_scene[current_edited_scene];
	es.selection = p_selection->get_selected_node_list();
	es.history_current=p_history->current;
	es.history_stored=p_history->history;
	es.editor_states=get_editor_states();
	es.custom_state=p_custom;

}

Dictionary EditorData::restore_edited_scene_state(EditorSelection *p_selection, EditorHistory *p_history) {
	ERR_FAIL_INDEX_V(current_edited_scene,edited_scene.size(),Dictionary());

	EditedScene &es=edited_scene[current_edited_scene];

	p_history->current=es.history_current;
	p_history->history=es.history_stored;


	p_selection->clear();
	for(List<Node*>::Element *E=es.selection.front();E;E=E->next()) {
		p_selection->add_node(E->get());
	}
	set_editor_states(es.editor_states);

	return es.custom_state;
}


void EditorData::set_edited_scene_import_metadata(Ref<ResourceImportMetadata> p_mdata) {

	ERR_FAIL_INDEX(current_edited_scene,edited_scene.size());
	edited_scene[current_edited_scene].medatata=p_mdata;

}

Ref<ResourceImportMetadata> EditorData::get_edited_scene_import_metadata(int idx) const{

	ERR_FAIL_INDEX_V(current_edited_scene,edited_scene.size(),Ref<ResourceImportMetadata>());
	if(idx<0) {
		return edited_scene[current_edited_scene].medatata;
	} else {
		ERR_FAIL_INDEX_V(idx,edited_scene.size(),Ref<ResourceImportMetadata>());
		return edited_scene[idx].medatata;
	}
}



void EditorData::clear_edited_scenes() {

	for(int i=0;i<edited_scene.size();i++) {
		if (edited_scene[i].root) {
			memdelete( edited_scene[i].root );
		}
	}
	edited_scene.clear();
}



void EditorData::set_plugin_window_layout(Ref<ConfigFile> p_layout) {
	for(int i=0;i<editor_plugins.size();i++) {
		editor_plugins[i]->set_window_layout(p_layout);
	}
}

void EditorData::get_plugin_window_layout(Ref<ConfigFile> p_layout) {
	for(int i=0;i<editor_plugins.size();i++) {
		editor_plugins[i]->get_window_layout(p_layout);
	}
}

EditorData::EditorData() {

	current_edited_scene=-1;

//	load_imported_scenes_from_globals();
}

///////////
void EditorSelection::_node_removed(Node *p_node) {

	if (!selection.has(p_node))
		return;

	Object *meta = selection[p_node];
	if (meta)
		memdelete(meta);
	selection.erase(p_node);
	changed=true;
	nl_changed=true;
}

void EditorSelection::add_node(Node *p_node) {

	ERR_FAIL_NULL(p_node);

	if (selection.has(p_node))
		return;

	changed=true;
	nl_changed=true;
	Object *meta=NULL;
	for(List<Object*>::Element *E=editor_plugins.front();E;E=E->next()) {

		meta = E->get()->call("_get_editor_data",p_node);
		if (meta) {
			break;
		}

	}
	selection[p_node]=meta;

	p_node->connect("exit_tree",this,"_node_removed",varray(p_node),CONNECT_ONESHOT);

	//emit_signal("selection_changed");
}

void EditorSelection::remove_node(Node *p_node) {

	ERR_FAIL_NULL(p_node);

	if (!selection.has(p_node))
		return;

	changed=true;
	nl_changed=true;
	Object *meta = selection[p_node];
	if (meta)
		memdelete(meta);
	selection.erase(p_node);
	p_node->disconnect("exit_tree",this,"_node_removed");
	//emit_signal("selection_changed");
}
bool EditorSelection::is_selected(Node * p_node) const {

	return selection.has(p_node);
}


Array EditorSelection::_get_selected_nodes() {

	Array ret;

	for (List<Node*>::Element *E=selected_node_list.front();E;E=E->next()) {

		ret.push_back(E->get());
	}

	return ret;
}

void EditorSelection::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("_node_removed"),&EditorSelection::_node_removed);
	ObjectTypeDB::bind_method(_MD("clear"),&EditorSelection::clear);
	ObjectTypeDB::bind_method(_MD("add_node","node:Node"),&EditorSelection::add_node);
	ObjectTypeDB::bind_method(_MD("remove_node","node:Node"),&EditorSelection::remove_node);
	ObjectTypeDB::bind_method(_MD("get_selected_nodes"),&EditorSelection::_get_selected_nodes);
	ADD_SIGNAL( MethodInfo("selection_changed") );

}

void EditorSelection::add_editor_plugin(Object *p_object) {

	editor_plugins.push_back(p_object);
}

void EditorSelection::_update_nl() {

	if (!nl_changed)
		return;

	selected_node_list.clear();

	for (Map<Node*,Object*>::Element *E=selection.front();E;E=E->next()) {


		Node *parent = E->key();
		parent=parent->get_parent();
		bool skip=false;
		while (parent) {
			if (selection.has(parent)) {
				skip=true;
				break;
			}
			parent=parent->get_parent();
		}

		if (skip)
			continue;
		selected_node_list.push_back(E->key());
	}

	nl_changed=true;
}

void EditorSelection::update() {

	_update_nl();

	if (!changed)
		return;
	emit_signal("selection_changed");
	changed=false;


}

List<Node*>& EditorSelection::get_selected_node_list() {

	if (changed)
		update();
	else
		_update_nl();
	return selected_node_list;
}




void EditorSelection::clear() {

	while( !selection.empty() ) {

		remove_node(selection.front()->key());
	}


	changed=true;
	nl_changed=true;

}
EditorSelection::EditorSelection() {

	changed=false;
	nl_changed=false;

}

EditorSelection::~EditorSelection() {

	clear();
}