@maxgraph/core
Version:
maxGraph is a fully client side JavaScript diagramming library that uses SVG and HTML for rendering.
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JavaScript
;
/*
Copyright 2023-present The maxGraph project Contributors
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.
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.ModelCodec = void 0;
const ObjectCodec_js_1 = __importDefault(require("../ObjectCodec.js"));
const GraphDataModel_js_1 = __importDefault(require("../../view/GraphDataModel.js"));
/**
* Codec for {@link GraphDataModel}s.
*
* This class is created and registered dynamically at load time and used implicitly via {@link Codec} and the {@link CodecRegistry}.
*
* @category Serialization with Codecs
*/
class ModelCodec extends ObjectCodec_js_1.default {
constructor() {
super(new GraphDataModel_js_1.default());
this.setName('GraphDataModel');
}
/**
* Encodes the given {@link GraphDataModel} by writing a (flat) XML sequence of cell nodes as produced by the {@link CellCodec}.
* The sequence is wrapped-up in a node with the name `root`.
*/
encodeObject(enc, obj, node) {
const rootNode = enc.document.createElement('root');
enc.encodeCell(obj.getRoot(), rootNode);
node.appendChild(rootNode);
}
/**
* Overrides decode child to handle special child nodes.
*/
decodeChild(dec, child, obj) {
if (child.nodeName === 'root') {
this.decodeRoot(dec, child, obj);
}
else {
super.decodeChild(dec, child, obj);
}
}
/**
* Reads the cells into the graph model. All cells are children of the root element in the node.
*/
decodeRoot(dec, root, model) {
let rootCell = null;
let tmp = root.firstChild;
while (tmp != null) {
const cell = dec.decodeCell(tmp);
if (cell != null && cell.getParent() == null) {
rootCell = cell;
}
tmp = tmp.nextSibling;
}
// Sets the root on the model if one has been decoded
if (rootCell != null) {
model.setRoot(rootCell);
}
}
}
exports.ModelCodec = ModelCodec;