使文本行具有相同的长度

时间:2012-01-30 20:14:36

标签: javascript jquery

在居中的h1元素中,如果文字落在多行上,换行符会使文字看起来像这样:

                This is a header that takes up two
                              lines

                This is a header that takes up three
                lines because it is really, really
                              long

有没有办法操纵这些元素,使文本行的长度大致相等?像这样:

                       This is a header that
                        takes up two lines

                    This is a header that takes 
                     up three lines because it
                       is really, really long

jQuery插件Widow Fix会阻止单字行,但我正在寻找能够在多行元素中均匀所有行的东西。是否有任何jQuery插件,或者你能推荐一个策略吗?

4 个答案:

答案 0 :(得分:5)

我只使用严格的JavaScript来解决它,就这样:
1.将一个名为'truncate'的类放到要打破的h1标签上 2.根据您的需要配置javascript代码

  • MAXCOUNT:每行计算的(整数)最大字符数
  • COUNT_SPACES :(布尔值)必须计算空格?
  • COUNT_PUNCTUATION :(布尔值)标点符号必须计算?
  • EXACT :(布尔值)必须删除最后一个单词?
  • BLOCKS_CLASS :(字符串)要考虑的h1的className

    我写的代码非常快,所以必须更好地测试bug, 但我认为这可能是一个起点
    我没有在这段代码中使用jQuery来保持代码轻松并避免依赖 我想我正在使用所有跨浏览器命令(无法测试它我现在只有linux)。但是,对于跨浏览器兼容性任务的任何更正(包括在请求时使用jquery)可能都很容易
    这是代码:

    <html>
    
    <head>
        <style>
            h1 {background-color: yellow;}
            #hiddenDiv {background-color: yellow; display: table-cell; visibility:hidden;}
        </style>
        <script>
    
            var MAXCOUNT            = 20;
            var COUNT_SPACES        = false;
            var EXACT               = false;
            var COUNT_PUNCTUATION   = true;
            var BLOCKS_CLASS        = 'truncate';
    
            window.onload = function () 
            {
                var hidden = document.getElementById('hiddenDiv');
    
                if (hidden == null)
                {
                    hidden = document.createElement('div');
                    hidden.id = 'hiddenDiv';
                    document.body.appendChild(hidden);
                }
    
                var blocks = document.getElementsByClassName(BLOCKS_CLASS);     
    
                for (var i=0; i<blocks.length; i++)
                {
                    var block           = blocks[i];
                    var text            = block.innerHTML;
                    var truncate        = '';
                    var html_tag        = false;
                    var special_char    = false;
                    maxcount            = MAXCOUNT;
                    for (var x=0; x<maxcount; x++)
                    {
                        var previous_char = (x>0) ? text.charAt(x-1) : '';
                        var current_char = text.charAt(x);
    
                        // Closing HTML tags
                        if (current_char == '>' && html_tag)
                        {
                            html_tag = false;
                            maxcount++;
                            continue;
                        }
                        // Closing special chars
                        if (current_char == ';' && special_char)
                        {
                            special_char = false;
                            maxcount++;
                            continue;
                        }
                        // Jumping HTML tags
                        if (html_tag)
                        {
                            maxcount++;
                            continue;
                        }
                        // Jumping special chars
                        if (special_char)
                        {
                            maxcount++;
                            continue;
                        }
                        // Checking for HTML tags
                        if (current_char == '<')
                        {
                            var next = text.substring(x,text.indexOf('>')+1);
                            var regex = /(^<\w+[^>]*>$)/gi;
                            var matches = regex.exec(next); 
                            if (matches[0])
                            {
                                html_tag = true;
                                maxcount++;
                                continue;
                            }                       
                        }
                        // Checking for special chars
                        if (current_char == '&')
                        {
                            var next = text.substring(x,text.indexOf(';')+1);
                            var regex = /(^&#{0,1}[0-9a-z]+;$)/gi;
                            var matches = regex.exec(next);
                            if (matches[0])
                            {
                                special_char = true;
                                maxcount++;
                                continue;
                            }
                        }                   
                        // Shrink multiple white spaces into a single white space
                        if (current_char == ' ' && previous_char == ' ')
                        {
                            maxcount++;
                            continue;
                        }
                        // Jump new lines
                        if (current_char.match(/\n/))
                        {
                            maxcount++;
                            continue;
                        }                   
                        if (current_char == ' ')
                        {
                            // End of the last word
                            if (x == maxcount-1 && !EXACT) { break; }
                            // Must I count white spaces?
                            if ( !COUNT_SPACES ) { maxcount++; }
                        }
                        // Must I count punctuation?
                        if (current_char.match(/\W/) && current_char != ' ' && !COUNT_PUNCTUATION)
                        {
                            maxcount++;
                        }
                        // Adding this char
                        truncate += current_char;
                        // Must I cut exactly?
                        if (!EXACT && x == maxcount-1) { maxcount++; }
                    }
    
                    hidden.innerHTML = '<h1><nobr>'+truncate+'</nobr></h1>';
    
                    block.style.width = hidden.offsetWidth+"px";
                }
            }
    
        </script>
    </head>
    
    
    <body>
    
    <center>
        <h1 class="truncate">
            This is a header that
            takes up two lines
        </h1>
    
        <br>
    
        <h1 class="truncate">
            This is a header that takes 
            up three lines because it
            is really, really long
        </h1>
    
        <br>
    
        <h1>
            This is a header pretty short
            or pretty long ... still undecided
            which in any case is not truncated!
        </h1>
    </center>
    
    </body>
    
    </html>
    

    这是一个演示:http://jsfiddle.net/6rtdF/

  • 答案 1 :(得分:0)

    这个派对迟到了,但这是我的方法。我得到了初始元素高度(在下面的代码中具有类balance_lines的任何元素),然后逐渐缩小元素的宽度。一旦元素的高度发生变化,我就走得太远了。之前的步骤应该具有可爱的大致相等的线长度。

    $('.balance_lines').each(function(){
        var currentHeight = $(this).height();
        var thisHeight = currentHeight;
        var currentWidth = $(this).width();
        var newWidth = currentWidth;
        // Try shrinking width until height changes
        while (thisHeight == currentHeight) {
            var testWidth = newWidth - 10;
            $(this).width(testWidth);
            thisHeight = $(this).height();
            if (thisHeight == currentHeight) {
                newWidth = testWidth;
            } else {
                break;
            }
        }
        $(this).width(newWidth);
    });
    

    您可以在apollopad.com的主页上查看此代码。

    答案 2 :(得分:0)

    这个派对迟到了,但这是我的方法。我得到初始元素高度(任何具有类balance_lines的元素,在下面的代码中),然后逐渐收缩元素的宽度。一旦元素的高度发生变化,我就走得太远了。之前的步骤应该具有可爱的大致相等的线长度

    答案 3 :(得分:0)

    CSS Text 4 draft提议text-wrap: balance,但我认为任何浏览器都没有实现它。

    与此同时,您可以使用Adobe的jQuery插件(demo):https://github.com/adobe-webplatform/balance-text