forked from alibaba/lowcode-engine
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathselection.ts
More file actions
170 lines (153 loc) · 3.6 KB
/
selection.ts
File metadata and controls
170 lines (153 loc) · 3.6 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
import { EventEmitter } from 'events';
import { obx, makeObservable } from '@alilc/lowcode-editor-core';
import { Node, comparePosition, PositionNO } from './node/node';
import { DocumentModel } from './document-model';
export class Selection {
private emitter = new EventEmitter();
@obx.shallow private _selected: string[] = [];
constructor(readonly doc: DocumentModel) {
makeObservable(this);
}
/**
* 选中的节点 id
*/
get selected(): string[] {
return this._selected;
}
/**
* 选中
*/
select(id: string) {
if (this._selected.length === 1 && this._selected.indexOf(id) > -1) {
// avoid cause reaction
return;
}
this._selected = [id];
this.emitter.emit('selectionchange', this._selected);
}
/**
* 批量选中
*/
selectAll(ids: string[]) {
this._selected = ids;
this.emitter.emit('selectionchange', this._selected);
}
/**
* 清除选中
*/
clear() {
if (this._selected.length < 1) {
return;
}
this._selected = [];
this.emitter.emit('selectionchange', this._selected);
}
/**
* 整理选中
*/
dispose() {
const l = this._selected.length;
let i = l;
while (i-- > 0) {
const id = this._selected[i];
if (!this.doc.hasNode(id)) {
this._selected.splice(i, 1);
}
}
if (this._selected.length !== l) {
this.emitter.emit('selectionchange', this._selected);
}
}
/**
* 添加选中
*/
add(id: string) {
if (this._selected.indexOf(id) > -1) {
return;
}
this._selected.push(id);
this.emitter.emit('selectionchange', this._selected);
}
/**
* 是否选中
*/
has(id: string) {
return this._selected.indexOf(id) > -1;
}
/**
* 移除选中
*/
remove(id: string) {
const i = this._selected.indexOf(id);
if (i > -1) {
this._selected.splice(i, 1);
this.emitter.emit('selectionchange', this._selected);
}
}
/**
* 选区是否包含节点
*/
containsNode(node: Node, excludeRoot = false) {
for (const id of this._selected) {
const parent = this.doc.getNode(id);
if (excludeRoot && parent?.contains(this.doc.focusNode)) {
continue;
}
if (parent?.contains(node)) {
return true;
}
}
return false;
}
/**
* 获取选中的节点
*/
getNodes() {
const nodes = [];
for (const id of this._selected) {
const node = this.doc.getNode(id);
if (node) {
nodes.push(node);
}
}
return nodes;
}
/**
* 获取顶层选区节点, 场景：拖拽时，建立蒙层，只蒙在最上层
*/
getTopNodes(includeRoot = false) {
const nodes = [];
for (const id of this._selected) {
const node = this.doc.getNode(id);
// 排除根节点
if (!node || (!includeRoot && node.contains(this.doc.focusNode))) {
continue;
}
let i = nodes.length;
let isTop = true;
while (i-- > 0) {
const n = comparePosition(nodes[i], node);
// nodes[i] contains node
if (n === PositionNO.Contains || n === PositionNO.TheSame) {
isTop = false;
break;
}
// node contains nodes[i], delete nodes[i]
if (n === PositionNO.ContainedBy) {
nodes.splice(i, 1);
}
}
// node is top item, push to nodes
if (isTop) {
nodes.push(node);
}
}
return nodes;
}
onSelectionChange(fn: (ids: string[]) => void): () => void {
this.emitter.on('selectionchange', fn);
return () => {
this.emitter.removeListener('selectionchange', fn);
};
}
}