mirror of
https://bitbucket.org/wisemapping/wisemapping-frontend.git
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112 lines
4.3 KiB
JavaScript
112 lines
4.3 KiB
JavaScript
/*
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* Copyright [2021] [wisemapping]
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*
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* Licensed under WiseMapping Public License, Version 1.0 (the "License").
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* It is basically the Apache License, Version 2.0 (the "License") plus the
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* "powered by wisemapping" text requirement on every single page;
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the license at
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*
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* http://www.wisemapping.org/license
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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import { $assert } from '@wisemapping/core-js';
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class DragConnector {
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constructor(designerModel, workspace) {
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$assert(designerModel, 'designerModel can not be null');
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$assert(workspace, 'workspace can not be null');
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// this._layoutManager = layoutManager;
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this._designerModel = designerModel;
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this._workspace = workspace;
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}
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checkConnection(dragTopic) {
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// Must be disconnected from their current connection ?.
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const candidates = this._searchConnectionCandidates(dragTopic);
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const currentConnection = dragTopic.getConnectedToTopic();
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if (currentConnection && (candidates.length === 0 || candidates[0] !== currentConnection)) {
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dragTopic.disconnect(this._workspace);
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}
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// Finally, connect nodes ...
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if (!dragTopic.isConnected() && candidates.length > 0) {
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dragTopic.connectTo(candidates[0]);
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}
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}
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_searchConnectionCandidates(dragTopic) {
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let topics = this._designerModel.getTopics();
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const draggedNode = dragTopic.getDraggedTopic();
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// Drag node connects to the border ...
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const dragTopicWidth = dragTopic.getSize ? dragTopic.getSize().width : 0; // Hack...
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const xMouseGap = dragTopic.getPosition().x > 0 ? 0 : dragTopicWidth;
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const sPos = { x: dragTopic.getPosition().x - xMouseGap, y: dragTopic.getPosition().y };
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// Perform a initial filter to discard topics:
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// - Exclude dragged topic
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// - Exclude dragTopic pivot
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// - Nodes that are collapsed
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// - It's not part of the branch dragged itself
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topics = topics.filter((topic) => {
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let result = draggedNode !== topic;
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result = result && topic !== draggedNode;
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result = result && !topic.areChildrenShrunken() && !topic.isCollapsed();
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result = result && !draggedNode.isChildTopic(topic);
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return result;
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});
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// Filter all the nodes that are outside the vertical boundary:
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// * The node is to out of the x scope
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// * The x distance greater the vertical tolerated distance
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topics = topics.filter((topic) => {
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const tpos = topic.getPosition();
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// Center topic has different alignment than the rest of the nodes.
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// That's why i need to divide it by two...
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const txborder = tpos.x + (topic.getSize().width / 2) * Math.sign(sPos.x);
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const distance = (sPos.x - txborder) * Math.sign(sPos.x);
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return distance > 0 && (distance < DragConnector.MAX_VERTICAL_CONNECTION_TOLERANCE);
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});
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// Assign a priority based on the distance:
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// - Alignment with the targetNode
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// - Vertical distance
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// - Horizontal proximity
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// - It's already connected.
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const currentConnection = dragTopic.getConnectedToTopic();
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const me = this;
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topics = topics.sort((a, b) => {
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const aPos = a.getPosition();
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const bPos = b.getPosition();
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const av = me._isVerticallyAligned(a.getSize(), aPos, sPos);
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const bv = me._isVerticallyAligned(b.getSize(), bPos, sPos);
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return me._proximityWeight(av, a, sPos, currentConnection)
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- me._proximityWeight(bv, b, sPos, currentConnection);
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});
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return topics;
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}
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_proximityWeight(isAligned, target, sPos, currentConnection) {
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const tPos = target.getPosition();
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return (isAligned ? 0 : 200) + Math.abs(tPos.x - sPos.x)
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+ Math.abs(tPos.y - sPos.y) + (currentConnection === target ? 0 : 100);
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}
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_isVerticallyAligned(targetSize, targetPosition, sourcePosition) {
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return Math.abs(sourcePosition.y - targetPosition.y) < targetSize.height / 2;
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}
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}
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DragConnector.MAX_VERTICAL_CONNECTION_TOLERANCE = 80;
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export default DragConnector;
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