blob: 32dcb11bb4de7b61e9e6ba753b3d0e569e2ae80a (
plain)
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
|
// Copyright (C) 2021 The Android Open Source Project
//
// 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.
import {Area, AreaById} from '../common/state';
import {globals} from '../frontend/globals';
export class AreaSelectionHandler {
private previousArea?: Area;
getAreaChange(): [boolean, AreaById|undefined] {
const currentSelection = globals.state.currentSelection;
if (currentSelection === null || currentSelection.kind !== 'AREA') {
return [false, undefined];
}
const selectedArea = globals.state.areas[currentSelection.areaId];
// Area is considered changed if:
// 1. The new area is defined and the old area undefined.
// 2. The new area is undefined and the old area defined (viceversa from 1).
// 3. Both areas are defined but their start or end times differ.
// 4. Both areas are defined but their tracks differ.
let hasAreaChanged = (!!this.previousArea !== !!selectedArea);
if (selectedArea && this.previousArea) {
// There seems to be an issue with clang-format http://shortn/_Pt98d5MCjG
// where `a ||= b` is formatted to `a || = b`, by inserting a space which
// breaks the operator.
// Therefore, we are using the pattern `a = a || b` instead.
hasAreaChanged =
hasAreaChanged || selectedArea.start !== this.previousArea.start;
hasAreaChanged =
hasAreaChanged || selectedArea.end !== this.previousArea.end;
hasAreaChanged = hasAreaChanged ||
selectedArea.tracks.length !== this.previousArea.tracks.length;
for (let i = 0; i < selectedArea.tracks.length; ++i) {
hasAreaChanged = hasAreaChanged ||
selectedArea.tracks[i] !== this.previousArea.tracks[i];
}
}
if (hasAreaChanged) {
this.previousArea = selectedArea;
}
return [hasAreaChanged, selectedArea];
}
}
|
