Question

我正在寻找一种方法来突出显示和格式化代码片段作为字符串传递给实时样式指南。我正在玩highlighjs和美化。它们非常有用且易于突出显示，但我似乎无法找到一种格式化方式，或者它们是否可以实际执行此操作。

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，以自动化使用样式指南的尘埃模板I的输出。

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>"

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>

关于如何实现这一目标的任何想法？谢谢！

Answer 1

你可以将它作为HTML解析为DOM，然后遍历每个写出来的元素，并在每次迭代时缩进它。

此代码可以完成这项工作。随意使用它，肯定会改善它。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/

使用JavaScript突出显示和格式化代码段

1 个答案: