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// Copyright 2015 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
class Selection {
constructor(stringKeyFnc) {
this.selection = new Map();
this.stringKey = stringKeyFnc;
}
isEmpty() {
return this.selection.size == 0;
}
clear() {
this.selection = new Map();
}
select(s, isSelected) {
if (!isIterable(s)) { s = [s]; }
for (const i of s) {
if (!i) continue;
if (isSelected == undefined) {
isSelected = !this.selection.has(this.stringKey(i));
}
if (isSelected) {
this.selection.set(this.stringKey(i), i);
} else {
this.selection.delete(this.stringKey(i));
}
}
}
isSelected(i) {
return this.selection.has(this.stringKey(i));
}
isKeySelected(key) {
return this.selection.has(key);
}
selectedKeys() {
var result = new Set();
for (var i of this.selection.keys()) {
result.add(i);
}
return result;
}
detachSelection() {
var result = new Set();
for (var i of this.selection.keys()) {
result.add(i);
}
this.clear();
return result;
}
[Symbol.iterator]() { return this.selection.values() }
}
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