xiongzhu
/
O2OA


			
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<textarea id="content" style="width: 600px; height: 500px"></textarea>
<textarea id="result" style="width: 600px; height: 500px"></textarea><br>

<input type="button" value="testStr" onclick="test()"/>
<input type="button" value="testDom" onclick="testDom()"/>

<div id="resultDiv"></div>


<script>
    var json = {
        "if": {
            "x": 0
        },
        "lp": {
            "saveIdeaDefault": "saveIdeaDefault",
            "text2": "text2",
            "text3": "text3",
            "items": [
                {
                    "itemvalue": "items1",
                    "subs": [
                        {"subvalue": "items1_sub1"},
                        {"subvalue": "items1_sub2"},
                        {"subvalue": "items1_sub3"},
                        {"subvalue": "items1_sub4"},
                        {"subvalue": "items1_sub5"}
                    ]
                },
                {
                    "itemvalue": "items2"
                },
                {
                    "itemvalue": "items3",
                    "subs": [
                        {"subvalue": "items3_sub1"},
                        {"subvalue": "items3_sub2"}
                    ]
                },
                {
                    "itemvalue": "items4",
                    "subs": [
                        {"subvalue": "items4_sub1"},
                        {"subvalue": "items4_sub2"},
                        {"subvalue": "items4_sub3"}
                    ]
                }
            ]
        }
    };
    function testDom(){
        document.all.resultDiv.innerHTML = "";
        var sd = new Date();
        var node = document.all.resultDiv;
        for (var r=0; r<18; r++){
            for (var i=0; i<json.lp.items.length; i++){
                var n = document.createElement("div");
                n.innerText = json.lp.text3;
                node.appendChild(n);

                var n2 = document.createElement("div");
                n2.className = "o2_profile_ideasSave";
                n2.innerText = json.lp.items[i].itemvalue;
                node.appendChild(n2);

                if (json.lp.items[i].subs){
                    for (var j=0; j<json.lp.items[i].subs.length; j++){
                        var n3 = document.createElement("div");
                        n3.className = "o2_profile_ideasSave";
                        n3.innerText = json.lp.items[i].subs[j].subvalue;
                        node.appendChild(n3);
                    }
                }
            }
        }

        document.all.result.value = node.innerHTML;

        var ed = new Date();
        alert(ed.getTime()-sd.getTime());
    }
    function test(){
        var sd = new Date();
        var t = document.all.content.value;
        var r = "";
        for (var z=0; z<18; z++){
            r += parseHtml(t, json);
        }
        document.all.result.value = r;
        document.all.resultDiv.innerHTML = r;

        var ed = new Date();
        alert(ed.getTime()-sd.getTime());
    }
    function _typeOf(item){
        if (item == null) return 'null';
        if (item.$family != null) return item.$family();
        if (item.constructor == window.Array) return "array";

        if (item.nodeName){
            if (item.nodeType == 1) return 'element';
            if (item.nodeType == 3) return (/\S/).test(item.nodeValue) ? 'textnode' : 'whitespace';
        } else if (typeof item.length == 'number'){
            if (item.callee) return 'arguments';
        }
        return typeof item;
    }
    function getIfBlockEnd(v){
        var rex = /(\{\{if\s+)|(\{\{\s*end if\s*\}\})/gmi;
        var rexEnd = /\{\{\s*end if\s*\}\}/gmi;
        var subs = 1;
        while ((match = rex.exec(v)) !== null) {
            var fullMatch = match[0];
            if (fullMatch.search(rexEnd)!==-1){
                subs--;
                if (subs==0) break;
            }else{
                subs++
            }
        }
        if (match) return {"codeIndex": match.index, "lastIndex": rex.lastIndex};
        return {"codeIndex": v.length-1, "lastIndex": v.length-1};
    }
    function getEachBlockEnd(v){
        var rex = /(\{\{each\s+)|(\{\{\s*end each\s*\}\})/gmi;
        var rexEnd = /\{\{\s*end each\s*\}\}/gmi;
        var subs = 1;
        while ((match = rex.exec(v)) !== null) {
            var fullMatch = match[0];
            if (fullMatch.search(rexEnd)!==-1){
                subs--;
                if (subs==0) break;
            }else{
                subs++;
            }
        }
        if (match) return {"codeIndex": match.index, "lastIndex": rex.lastIndex};
        return {"codeIndex": v.length-1, "lastIndex": v.length-1};
    }
    function parseHtml(str, json){
        var v = str;
        var rex = /(\{\{\s*)[\s\S]*?(\s*\}\})/gmi;

        var match;
        while ((match = rex.exec(v)) !== null) {
            var fullMatch = match[0];
            var offset = 0;

            //if statement begin
            if (fullMatch.search(/\{\{if\s+/i)!==-1){
                //找到对应的end if
                var condition = fullMatch.replace(/^\{\{if\s*/i, "");
                condition = condition.replace(/\s*\}\}$/i, "");
                var flag = _jsonText(json, condition, "boolean");

                var tmpStr = v.substring(rex.lastIndex, v.length);
                var endIfIndex = getIfBlockEnd(tmpStr);
                if (flag){ //if 为 true
                    var parseStr = parseHtml(tmpStr.substring(0, endIfIndex.codeIndex), json);
                    var vLeft = v.substring(0, match.index);
                    var vRight = v.substring(rex.lastIndex+endIfIndex.lastIndex, v.length);
                    v = vLeft + parseStr + vRight;
                    offset = parseStr.length - fullMatch.length;
                }else{
                    v = v.substring(0, match.index) + v.substring(rex.lastIndex+endIfIndex.lastIndex, v.length);
                    offset = 0-fullMatch.length;
                }
            }else  if (fullMatch.search(/\{\{each\s+/)!==-1) { //each statement
                var itemString = fullMatch.replace(/^\{\{each\s*/, "");
                itemString = itemString.replace(/\s*\}\}$/, "");
                var eachValue = _jsonText(json, itemString, "object");

                var tmpEachStr = v.substring(rex.lastIndex, v.length);
                var endEachIndex = getEachBlockEnd(tmpEachStr);

                var parseEachStr = tmpEachStr.substring(0, endEachIndex.codeIndex);
                var eachResult = "";
                if (eachValue && _typeOf(eachValue)==="array"){
                    for (var i=0; i<eachValue.length; i++){
                        eachValue[i]._ = json;
                        var parseEachResultStr = parseHtml(parseEachStr, eachValue[i]);
                        eachResult += parseEachResultStr;
                    }
                    var eLeft = v.substring(0, match.index);
                    var eRight = v.substring(rex.lastIndex+endEachIndex.lastIndex, v.length);
                    v = eLeft + eachResult + eRight;
                    offset = eachResult.length - fullMatch.length;
                }else{
                    v = v.substring(0, match.index) + v.substring(rex.lastIndex+endEachIndex.lastIndex, v.length);
                    offset = 0-fullMatch.length;
                }

            }else{ //text statement
                var text = fullMatch.replace(/^\{\{\s*/, "");
                text = text.replace(/\}\}\s*$/, "");
                var value = _jsonText(json, text);
                offset = value.length-fullMatch.length;
                v = v.substring(0, match.index) + value + v.substring(rex.lastIndex, v.length);
            }
            rex.lastIndex = rex.lastIndex + offset;
        }
        return v;
    }

    function parseHtml2(str, blocks){
        var v = str;
        var rex = /(\{\{\s*)[\s\S]*?(\s*\}\})/g;
        var block = null, ifBlock = null, eachBlock = null;
        if (blocks && blocks.length){
            for (var i=blocks.length-1; i>=0; i--){
                if (i===blocks.length-1) block = blocks[i];
                if (!ifBlock && blocks[i].type==="if") ifBlock = blocks[i];
                if (!eachBlock && blocks[i].type==="each") eachBlock = blocks[i];
                if (block && ifBlock && eachBlock) break;
            }
        }

        var match;
        while ((match = rex.exec(v)) !== null) {
            var fullMatch = match[0];
            var offset = 0;

            //if statement begin
            if (fullMatch.search(/^\{\{if\s+/)!==-1){
                var ifBlockObj = {"start": match.index, "type": "if"};
                var condition = fullMatch.replace(/^\{\{if\s*/, "");
                condition = condition.replace(/\s*\}\}$/, "");
                ifBlockObj.value = _jsonText(json, condition, "boolean");
                if (!blocks) blocks = [];
                blocks.push(ifBlockObj);
                block = ifBlockObj;
                ifBlock = ifBlockObj;

                v = v.substring(0, match.index) + v.substring(rex.lastIndex, v.length);
                offset = 0 - fullMatch.length;

            }else if (fullMatch.search(/\{\{\s*end if\s*\}\}/)!==-1){ //if statement end
                if (ifBlock && !ifBlock.value){
                    v = v.substring(0, ifBlock.start) + v.substring(rex.lastIndex, v.length);
                    offset = ifBlock.start - rex.lastIndex;
                }else{
                    v = v.substring(0, match.index) + v.substring(rex.lastIndex, v.length);
                    offset = 0 - fullMatch.length;
                }
            }else if (fullMatch.search(/^\{\{each\s+/)!==-1) { //each statement
                var eachBlockObj = {"start": match.index, "type": "each"};
                var itemString = fullMatch.replace(/^\{\{each\s*/, "");
                itemString = itemString.replace(/\s*\}\}$/, "");
                eachBlockObj.value = _jsonText(json, itemString, "object");
                if (!blocks) blocks = [];
                blocks.push(eachBlockObj);
                block = eachBlockObj;
                eachBlock = eachBlockObj;

                v = v.substring(0, match.index) + v.substring(rex.lastIndex, v.length);
                offset = 0 - fullMatch.length;

            }else if (fullMatch.search(/\{\{\s*end each\s*\}\}/)!==-1) { //each statement end


            }else{ //text statement
                if (ifBlock && !ifBlock.value){
                    v = v.substring(0, ifBlock.start) + v.substring(rex.lastIndex, v.length);
                    offset = ifBlock.start - rex.lastIndex;
                }else{
                    var text = fullMatch.replace(/^\{\{\s*/, "");
                    text = text.replace(/\}\}\s*$/, "");
                    var value = _jsonText(((eachBlock) ? eachBlock.value : json), text);
                    offset = value.length-fullMatch.length;
                    v = v.substring(0, match.index) + value + v.substring(rex.lastIndex, v.length);
                }

            }
            rex.lastIndex = rex.lastIndex + offset;
        }
        return v;
    }

    function _jsonText(json, text, type){
        var $ = json;
        var f = eval("(function($){\n return "+text+";\n})");
        returnValue = f.apply(json, [$]);
        if (returnValue===undefined) returnValue="";
        if (type==="boolean") return (!!returnValue);
        if (type==="object") return returnValue;
        returnValue = returnValue.toString();
        return returnValue || "";
    }

</script>
</body>
</html>