Initial commit

lib/weltmeister/undo.js

@@ -0,0 +1,234 @@
+ig.module(
+	'weltmeister.undo'
+)
+.requires(
+	'weltmeister.config'
+)
+.defines(function(){ "use strict";
+
+
+wm.Undo = ig.Class.extend({
+	levels: 10,
+	chain: [],
+	rpos: 0,
+	currentAction: null,
+	
+	init: function( levels ) {
+		this.levels = levels || 10;
+	},
+	
+	
+	clear: function() {
+		this.chain = [];
+		this.currentAction = null;
+	},
+	
+	
+	commit: function( action ) {
+		if( this.rpos ) {
+			this.chain.splice( this.chain.length - this.rpos, this.rpos );
+			this.rpos = 0;
+		}
+		action.activeLayer = ig.game.activeLayer ? ig.game.activeLayer.name : '';
+		this.chain.push( action );
+		if( this.chain.length > this.levels ) {
+			this.chain.shift();
+		}
+	},
+	
+	
+	undo: function() {
+		var action = this.chain[ this.chain.length - this.rpos - 1 ];
+		if( !action ) {
+			return;
+		}
+		this.rpos++;
+		
+		
+		ig.game.setActiveLayer( action.activeLayer );
+		
+		if( action.type == wm.Undo.MAP_DRAW ) {
+			for( var i = 0; i < action.changes.length; i++ ) {
+				var change = action.changes[i];
+				change.layer.setTile( change.x, change.y, change.old );
+			}
+		}
+		else if( action.type == wm.Undo.ENTITY_EDIT ) {
+			action.entity.pos.x = action.old.x;
+			action.entity.pos.y = action.old.y;
+			action.entity.size.x = action.old.w;
+			action.entity.size.y = action.old.h;
+			ig.game.entities.selectEntity( action.entity );
+			ig.game.entities.loadEntitySettings();
+		}
+		else if( action.type == wm.Undo.ENTITY_CREATE ) {
+			ig.game.entities.removeEntity( action.entity );
+			ig.game.entities.selectEntity( null );
+		}
+		else if( action.type == wm.Undo.ENTITY_DELETE ) {
+			ig.game.entities.entities.push( action.entity );
+			if( action.entity.name ) {
+				this.namedEntities[action.entity.name] = action.entity;
+			}
+			ig.game.entities.selectEntity( action.entity );
+		}
+		
+		ig.game.setModified();
+	},
+	
+	
+	redo: function() {
+		if( !this.rpos ) {
+			return;
+		}
+		
+		var action = this.chain[ this.chain.length - this.rpos ];
+		if( !action ) {
+			return;
+		}
+		this.rpos--;
+		
+		
+		ig.game.setActiveLayer( action.activeLayer );
+		
+		if( action.type == wm.Undo.MAP_DRAW ) {
+			for( var i = 0; i < action.changes.length; i++ ) {
+				var change = action.changes[i];
+				change.layer.setTile( change.x, change.y, change.current );
+			}
+		}
+		else if( action.type == wm.Undo.ENTITY_EDIT ) {
+			action.entity.pos.x = action.current.x;
+			action.entity.pos.y = action.current.y;
+			action.entity.size.x = action.current.w;
+			action.entity.size.y = action.current.h;
+			ig.game.entities.selectEntity( action.entity );
+			ig.game.entities.loadEntitySettings();
+		}
+		else if( action.type == wm.Undo.ENTITY_CREATE ) {
+			ig.game.entities.entities.push( action.entity );
+			if( action.entity.name ) {
+				this.namedEntities[action.entity.name] = action.entity;
+			}
+			ig.game.entities.selectEntity( action.entity );
+		}
+		else if( action.type == wm.Undo.ENTITY_DELETE ) {
+			ig.game.entities.removeEntity( action.entity );
+			ig.game.entities.selectEntity( null );
+		}
+		
+		ig.game.setModified();
+	},
+	
+	
+	// -------------------------------------------------------------------------
+	// Map changes
+	
+	beginMapDraw: function( layer ) {
+		this.currentAction = {
+			type: wm.Undo.MAP_DRAW,
+			time: Date.now(),
+			changes: []
+		};
+	},
+	
+	pushMapDraw: function( layer, x, y, oldTile, currentTile ) {
+		if( !this.currentAction ) {
+			return;
+		}
+		
+		this.currentAction.changes.push({
+			layer: layer,
+			x: x,
+			y: y,
+			old: oldTile,
+			current: currentTile
+		});
+	},
+	
+	endMapDraw: function() {		
+		if( !this.currentAction || !this.currentAction.changes.length ) {
+			return;
+		}
+		
+		this.commit( this.currentAction );		
+		this.currentAction = null;
+	},
+	
+	
+	// -------------------------------------------------------------------------
+	// Entity changes
+	
+	beginEntityEdit: function( entity ) {		
+		this.currentAction = {
+			type: wm.Undo.ENTITY_EDIT,
+			time: Date.now(),
+			entity: entity,
+			old: {
+				x: entity.pos.x,
+				y: entity.pos.y,
+				w: entity.size.x,
+				h: entity.size.y
+			},
+			current: {
+				x: entity.pos.x,
+				y: entity.pos.y,
+				w: entity.size.x,
+				h: entity.size.y
+			}
+		};
+	},
+
+	pushEntityEdit: function( entity ) {		
+		if( !this.currentAction ) {
+			return;
+		}
+		
+		this.currentAction.current = {
+			x: entity.pos.x,
+			y: entity.pos.y,
+			w: entity.size.x,
+			h: entity.size.y
+		};
+	},
+	
+	
+	endEntityEdit: function() {	
+		var a = this.currentAction;
+		
+		if( !a || (
+			a.old.x == a.current.x && a.old.y == a.current.y &&
+			a.old.w == a.current.w && a.old.h == a.current.h
+		)) {
+			return;
+		}
+		
+		this.commit( this.currentAction );		
+		this.currentAction = null;
+	},
+	
+	
+	commitEntityCreate: function( entity ) {		
+		this.commit({
+			type: wm.Undo.ENTITY_CREATE,
+			time: Date.now(),
+			entity: entity
+		});
+	},
+	
+	
+	commitEntityDelete: function( entity ) {		
+		this.commit({
+			type: wm.Undo.ENTITY_DELETE,
+			time: Date.now(),
+			entity: entity
+		});
+	}
+});
+
+wm.Undo.MAP_DRAW = 1;
+wm.Undo.ENTITY_EDIT = 2;
+wm.Undo.ENTITY_CREATE = 3;
+wm.Undo.ENTITY_DELETE = 4;
+
+});