js实现文本代码对比不同-html代码-BFW代码库

js实现文本代码对比不同

代码语言：html

所属分类：其他

下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!doctype html>
<html>
 
<head>
    <title>文本比较工具</title>
    <style type="text/css">
        .text textarea {
            resize: none;
            background: none repeat scroll 0 0 transparent;
            border: 0 none;
            width: 97%;
            height: 500px;
            overflow-y: scroll;
            position: absolute;
            left: 0;
            top: 0;
            z-index: 2;
            font-size: 18px;
            white-space: pre-wrap;
            word-wrap: break-word;
            word-break: break-all;
            border: 1px solid red;
        }
 
        .text {
            overflow-y: scroll;
            white-space: pre-wrap;
            word-wrap: break-word;
            word-break: break-all;
            width: 50%;
            float: left;
            text-align: left;
            z-index: 1;
            font-size: 18px;
            position: relative;
            min-height: 510px;
        }
 
        .add {
            color: red;
        }
 
        .delete {
            color: blue;
            text-decoration: line-through;
        }
 
        .button {
            width: 100%;
            line-height: 30px;
            font-size: 30px;
            border: 1px solid green;
            padding: 10px;
            cursor: pointer;
            text-align: center;
        }
 
        #result-box {
            padding: 20px;
            border: 1px solid blue;
        }
        .compare-box:after{
            content: "";
            display:block;
            clear: both;
        }
        #result{
            font-size: 20px;
        }
    </style>
</head>
 
<body>
    <div id="result-box">
        <pre id="result"></pre>
    </div>
    <div class="compare-box">
        <div class="text left-box">
            <textarea id="edit_textarea_1"></textarea>
        </div>
        <div class="text right-box">
            <textarea id="edit_textarea_2"></textarea>
        </div>
    </div>
    <div class="button">比较</div>
    <script type="text/javascript">
        function textchange() {
            var op = eq({ value1: document.getElementById("edit_textarea_1").value, value2: document.getElementById("edit_textarea_2").value });
            document.getElementById("result").innerHTML = op.value2 + "\r\n";
        }
        function eq(op) {
            if (!op) {
                return op;
            }
            if (!op.eq_min) {
                op.eq_min = 3;
            }
            if (!op.eq_index) {
                op.eq_index = 5;
            }
            if (!op.value1 || !op.value2) {
                return op;
            }
            var ps = {
                v1_i: 0,
                v1_new_value: "",
                v2_i: 0,
                v2_new_value: ""
            };
            while (ps.v1_i < op.value1.length && ps.v2_i < op.value2.length) {
                if (op.value1[ps.v1_i] == op.value2[ps.v2_i]) {
                    //ps.v1_new_value += op.value1[ps.v1_i].replace(/</g,"<").replace(">",">");
                    ps.v2_new_value += op.value2[ps.v2_i].replace(/</g, "<").replace(">", ">");
                    ps.v1_i += 1;
                    ps.v2_i += 1;
                    //值2增加的部分
                    if (ps.v1_i >= op.value1.length) {
                        ps.v2_new_value += "<span class='add'>" + op.value2.substr(ps.v2_i).replace(/</g, "<").replace(">", ">") + "</span>";
                        break;
                    }
                    //值1删除的部分
                    if (ps.v2_i >= op.value2.length) {
                        //ps.v1_new_value += "<span style='" + op.value1_style + "'>值1多的" + op.value1.substr(ps.v1_i).replace(/</g,"<").replace(">",">") + "</span>";
                        ps.v2_new_value += "<span class='delete'>" + op.value1.substr(ps.v1_i).replace(/</g, "<").replace(">", ">") + "</span>";
                        break;
                    }
                } else {
                    ps.v1_index = ps.v1_i + 1;
                    ps.v1_eq_length = 0;
                    ps.v1_eq_max = 0;
                    ps.v1_start = ps.v1_i + 1;
                    while (ps.v1_index < op.value1.length) {
                        if (op.value1[ps.v1_index] == op.value2[ps.v2_i + ps.v1_eq_length]) {
                            ps.v1_eq_length += 1;
                        } else if (ps.v1_eq_length > 0) {
                            if (ps.v1_eq_max < ps.v1_eq_length) {
                                ps.v1_eq_max = ps.v1_eq_length;
                                ps.v1_start = ps.v1_index - ps.v1_eq_length;
                            }
                            ps.v1_eq_length = 0;
                            break;//只寻找最近的
                        }
                        ps.v1_index += 1;
                    }
                    if (ps.v1_eq_max < ps.v1_eq_length) {
                        ps.v1_eq_max = ps.v1_eq_length;
                        ps.v1_start = ps.v1_index - ps.v1_eq_length;
                    }
 
                    ps.v2_index = ps.v2_i + 1;
                    ps.v2_eq_length = 0;
                    ps.v2_eq_max = 0;
                    ps.v2_start = ps.v2_i + 1;
                 .........完整代码请登录后点击上方下载按钮下载查看