63 lines
1.6 KiB
TypeScript
63 lines
1.6 KiB
TypeScript
// @ts-nocheck
|
||
/**
|
||
* 计算字符串字符的长度并可以截取字符串。
|
||
* @param char 传入字符串（maxcharacter条件下，一个汉字表示两个字符）
|
||
* @param max 规定最大字符串长度
|
||
* @returns 当没有传入maxCharacter/maxLength 时返回字符串字符长度，当传入maxCharacter/maxLength时返回截取之后的字符串和长度。
|
||
*/
|
||
export type CharacterLengthResult = {
|
||
length : number;
|
||
characters : string;
|
||
}
|
||
// #ifdef APP-ANDROID
|
||
type ChartType = any
|
||
// #endif
|
||
// #ifndef APP-ANDROID
|
||
type ChartType = string | number
|
||
// #endif
|
||
|
||
export function characterLimit(type : string, char : ChartType, max : number) : CharacterLengthResult {
|
||
const str = `${char}`;
|
||
|
||
if (str.length == 0) {
|
||
return {
|
||
length: 0,
|
||
characters: '',
|
||
} as CharacterLengthResult
|
||
}
|
||
|
||
if (type == 'maxcharacter') {
|
||
let len = 0;
|
||
for (let i = 0; i < str.length; i += 1) {
|
||
let currentStringLength : number// = 0;
|
||
const code = str.charCodeAt(i)!
|
||
if (code > 127 || code == 94) {
|
||
currentStringLength = 2;
|
||
} else {
|
||
currentStringLength = 1;
|
||
}
|
||
if (len + currentStringLength > max) {
|
||
return {
|
||
length: len,
|
||
characters: str.slice(0, i),
|
||
} as CharacterLengthResult
|
||
}
|
||
len += currentStringLength;
|
||
}
|
||
return {
|
||
length: len,
|
||
characters: str,
|
||
} as CharacterLengthResult
|
||
} else if (type == 'maxlength') {
|
||
const length = str.length > max ? max : str.length;
|
||
return {
|
||
length: length,
|
||
characters: str.slice(0, length),
|
||
} as CharacterLengthResult
|
||
}
|
||
|
||
return {
|
||
length: str.length,
|
||
characters: str,
|
||
} as CharacterLengthResult
|
||
}; |