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/**
* Copyright 2013 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
**/
RED.history = (function() {
var undo_history = [];
return {
//TODO: this function is a placeholder until there is a 'save' event that can be listened to
markAllDirty: function() {
for (var i=0;i<undo_history.length;i++) {
undo_history[i].dirty = true;
}
},
depth: function() {
return undo_history.length;
},
push: function(ev) {
undo_history.push(ev);
},
pop: function() {
var ev = undo_history.pop();
var i;
if (ev) {
if (ev.t == 'add') {
if (ev.nodes) {
for (i=0;i<ev.nodes.length;i++) {
RED.nodes.remove(ev.nodes[i]);
}
}
if (ev.links) {
for (i=0;i<ev.links.length;i++) {
RED.nodes.removeLink(ev.links[i]);
}
}
if (ev.workspaces) {
for (i=0;i<ev.workspaces.length;i++) {
RED.nodes.removeWorkspace(ev.workspaces[i].id);
RED.view.removeWorkspace(ev.workspaces[i]);
}
}
} else if (ev.t == "delete") {
if (ev.workspaces) {
for (i=0;i<ev.workspaces.length;i++) {
RED.nodes.addWorkspace(ev.workspaces[i]);
RED.view.addWorkspace(ev.workspaces[i]);
}
}
if (ev.nodes) {
for (i=0;i<ev.nodes.length;i++) {
RED.nodes.add(ev.nodes[i]);
}
}
if (ev.links) {
for (i=0;i<ev.links.length;i++) {
RED.nodes.addLink(ev.links[i]);
}
}
} else if (ev.t == "move") {
for (i=0;i<ev.nodes.length;i++) {
var n = ev.nodes[i];
n.n.x = n.ox;
n.n.y = n.oy;
n.n.dirty = true;
}
} else if (ev.t == "edit") {
for (i in ev.changes) {
if (ev.changes.hasOwnProperty(i)) {
ev.node[i] = ev.changes[i];
}
}
RED.editor.updateNodeProperties(ev.node);
if (ev.links) {
for (i=0;i<ev.links.length;i++) {
RED.nodes.addLink(ev.links[i]);
}
}
RED.editor.validateNode(ev.node);
ev.node.dirty = true;
ev.node.changed = ev.changed;
}
RED.view.dirty(ev.dirty);
RED.view.redraw();
}
}
}
})();
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