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1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16import mediaQuery from '@ohos.mediaquery'
17
18declare interface BreakPointTypeOption<T> {
19  xs?: T
20  sm?: T
21  md?: T
22  lg?: T
23  xl?: T
24  xxl?: T
25}
26
27export class BreakPointType<T> {
28  options: BreakPointTypeOption<T>
29
30  constructor(option: BreakPointTypeOption<T>) {
31    this.options = option
32  }
33
34  getValue(currentBreakPoint: string) {
35    if (currentBreakPoint === 'xs') {
36      return this.options.xs
37    } else if (currentBreakPoint === 'sm') {
38      return this.options.sm
39    } else if (currentBreakPoint === 'md') {
40      return this.options.md
41    } else if (currentBreakPoint === 'lg') {
42      return this.options.lg
43    } else if (currentBreakPoint === 'xl') {
44      return this.options.xl
45    } else if (currentBreakPoint === 'xxl') {
46      return this.options.xxl
47    } else {
48      return undefined
49    }
50  }
51}
52
53type Breakpoint = {
54  name: string
55  size: number
56  mediaQueryListener?: mediaQuery.MediaQueryListener
57}
58
59export class BreakpointSystem {
60  private currentBreakpoint: string = 'md'
61  private breakpoints: Breakpoint[] = [{ name: 'xs', size: 0 }, { name: 'sm', size: 320 },
62                                       { name: 'md', size: 520 }, { name: 'lg', size: 840 }]
63
64  private updateCurrentBreakpoint(breakpoint: string) {
65    if (this.currentBreakpoint !== breakpoint) {
66      this.currentBreakpoint = breakpoint
67      AppStorage.Set<string>('currentBreakpoint', this.currentBreakpoint)
68      console.log('on current breakpoint: ' + this.currentBreakpoint)
69    }
70  }
71
72  public register() {
73    this.breakpoints.forEach((breakpoint: Breakpoint, index) => {
74      let condition
75      if (index === this.breakpoints.length - 1) {
76        condition = "(" + breakpoint.size + "vp<=width" + ")"
77      } else {
78        condition = "(" + breakpoint.size + "vp<=width<" + this.breakpoints[index + 1].size + "vp)"
79      }
80      console.log(condition)
81      breakpoint.mediaQueryListener = mediaQuery.matchMediaSync(condition)
82      breakpoint.mediaQueryListener.on('change', (mediaQueryResult) => {
83        if (mediaQueryResult.matches) {
84          this.updateCurrentBreakpoint(breakpoint.name)
85        }
86      })
87    })
88  }
89
90  public unregister() {
91    this.breakpoints.forEach((breakpoint: Breakpoint) => {
92      breakpoint.mediaQueryListener.off('change')
93    })
94  }
95}