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我正在寻找一种方法来突出显示和格式化作为字符串传递的代码片段，以用于实时风格指南。我正在玩 highlighjs 和美化。它们真的很有帮助，也很容易突出显示，但我似乎无法找到一种格式化的方法，或者他们是否真的可以这样做。

通过格式化，我的意思是制表符和换行符使代码清晰易读。我需要将代码作为字符串传递，以自动输出我用于样式指南的灰尘模板。

也就是说，我想通过：

"<table><tr><td class="title">Name</td><td class="title">Category</td><td class="title">Results</td></tr></table>"

并得到类似的东西：

<table>
        <tr>
            <td class="title">Name</td>
            <td class="title">Category</td>
            <td class="title">Results</td>
        </tr>
</table>

关于如何做到这一点的任何想法？谢谢！

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1 回答 1

0

您可以将其作为 HTML 解析为 DOM，然后遍历每个元素，将其写出并在每次迭代时缩进。

这段代码将完成这项工作。随意使用它，并肯定会改进它。它的版本是 0.0.0.1。

var htmlString = '<table><tr><td class="title">Name</td><td class="title">Category</td><td class="title">Results</td></tr></table>';

//create a containing element to parse the DOM.
var documentDOM = document.createElement("div");
//append the html to the DOM element.
documentDOM.insertAdjacentHTML('afterbegin', htmlString);

//create a special HTML element, this shows html as normal text.
var documentDOMConsole = document.createElement("xmp");
documentDOMConsole.style.display = "block";

//append the code display block.
document.body.appendChild(documentDOMConsole);

function indentor(multiplier)
{
    //indentor handles the indenting. The multiplier adds \t (tab) to the string per multiplication.
    var indentor = "";
    for (var i = 0; i < multiplier; ++i)
    {
        indentor += "\t";
    }
    return indentor;
}

function recursiveWalker(element, indent)
{
    //recursiveWalker walks through the called DOM recursively.
    var elementLength = element.children.length; //get the length of the children in the parent element.

    //iterate over all children.
    for (var i = 0; i < elementLength; ++i)
    {
        var indenting = indentor(indent); //set indenting for this iteration. Starts with 1.
        var elements = element.children[i].outerHTML.match(/<[^>]*>/g); //retrieve the various tags in the outerHTML.
        var elementTag = elements[0]; //this will be opening tag of this element including all attributes.
        var elementEndTag = elements[elements.length-1]; //get the last tag.

        //write the opening tag with proper indenting to the console. end with new line \n
        documentDOMConsole.innerHTML += indenting + elementTag + "\n"; 

        //get the innerText of the top element, not the childs using the function getElementText
        var elementText = getElementText(element.children[i]);

        //if the texts length is greater than 0 put the text on the page, else skip.
        if (elementText.length > 0)
        {
            //indent the text one more tab, end with new line.
            documentDOMConsole.innerHTML += (indenting + indentor(1) ) + elementText+ "\n";
        }

        if (element.children[i].children.length > 0)
        {
            //when the element has children call function recursiveWalker.
            recursiveWalker(element.children[i], (indent+1));
        }

        //if the start tag matches the end tag, write the end tag to the console.
        if ("<"+element.children[i].nodeName.toLowerCase()+">" == elementEndTag.replace(/\//, ""))
        {
            documentDOMConsole.innerHTML += indenting + elementEndTag + "\n";
        }
    }
}

function getElementText(el)
{
        child = el.firstChild,
        texts = [];

    while (child) {
        if (child.nodeType == 3) {
            texts.push(child.data);
        }
        child = child.nextSibling;
    }

    return texts.join("");
}

    recursiveWalker(documentDOM, 1);

http://jsfiddle.net/f2L82m8h/

于 2015-01-02T21:37:00.493 回答