使用jQuery将长字符串拆分为文本块

Question

我有一个长字符串需要切成数组内的单独块,预定义的长度限制块.一些规则适用:

1. 如果限制削减了一个单词,那么该单词将被分开以用于下一个单词.
2. 必须修剪切片(数组项的开头或结尾没有空格).
3. 特殊标点符号!,？应该留在这个词,而不是发送到下一个块.

原文:我的时间完全没有受到重视.您可以在这间客房内运营整个公园,最少有3天的工作人员.您认为那种自动化很容易吗？还是便宜？你知道有谁可以联网8台连接机器并调试200万行代码,以便我为这份工作买单吗？因为如果他能让我看到他试试.

结果与当前代码 ["我完全","在我的时间中没有得到认可",".你可以运行这整个","从这个房间停放","最小的工作人员,最多","3天.你认为","有点自动化是","sy？还是便宜？你知道","任何可以联网的人,"8个连接机器","调试200万行",我的出价代码" ,"为了这份工作？因为如果","我可以看到h","我试试."]

...它应该居然是:

["我完全","在我的时间里没有得到赏识.","你可以运行这一整体","从这个房间停放","最少3"的工作人员,"几天.你认为那种","自动化很容易？","或便宜？你知道任何人","谁可以网络8","连接机器和","调试200万行","代码为我竞标",这项工作？因为如果他","我想看到他","试试."]

如您所见,我仍然遇到第2和第3条规则的问题.

这是我目前的代码(您可以在jsfiddle中查看工作演示):

function text_split(string, limit, pos, lines) {
    //variables
    if(!pos) pos = 0;
    if(!lines) lines = [];
    var length = string.val().length;
    var length_current;

    //cut string
    var split = string.val().substr(pos, limit);
    if(/^\S/.test(string.val().substr(pos, limit))) {
        //check if it is cutting a word
        split = split.replace(/\s+\S*$/, "");
    }

    //current string length
    length_current = split.length;

    //current position
    pos_current = length_current + pos;

    //what to do
    if(pos_current < length) {
        lines.push(split);
        return text_split(string, limit, pos_current, lines);
    } else {
        console.log(lines);
        return lines;
    }
}
$(function(){
    $('#button').click(function(){
        text_split($('#textarea'), 25);
    });
});

演示的html表单:

<textarea id="textarea" rows="10" cols="80">I am totally unappreciated in my time. You can run this whole park from this room with minimal staff for up to 3 days. You think that kind of automation is easy? Or cheap? You know anybody who can network 8 connection machines and debug 2 million lines of code for what I bid for this job? Because if he can I'd like to see him try.</textarea>
<button id="button">demo</button>

Answer 1

最多25个字符的示例,您可以使用此模式:

/\S[\s\S]{0,23}\S(?=\s|$)/g

演示

代码示例:

var text = " I am totally unappreciated in my time. You can run this whole park from this room with minimal staff for up to 3 days. You think that kind of automation is easy? Or cheap? You know anybody who can network 8 connection machines and debug 2 million lines of code for what I bid for this job? Because if he can I'd like to see him try.";

var myRe = /\S[\s\S]{0,23}\S(?=\s|$)/g;
var m;
var result = new Array();

while ((m = myRe.exec(text)) !== null) {
   result.push(m[0]);
}

console.log(result);

注意:如果需要动态选择最大大小,则必须使用备用语法来定义RegExp对象:

var n = 25;
var myRe = new RegExp("\\S[\\s\\S]{0," + (n-2) + "}\\S(?=\\s|$)", "g");

图案细节:

\S             # a non-space character (it is obviously preceded by a space 
               # or the start of the string since the previous match
               # ends before a space)

[\s\S]{0,23}   # between 0 or 23 characters

\S(?=\s|$)     # a non-space character followed by a space or the end of the string