MikeCoder / MJsonViewer

mjsonviewer.js

//////////////////////////////////////////////////////////////////////////////////////
// Copyright © 2017 TangDongxin
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
// OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//////////////////////////////////////////////////////////////////////////////////////

// ===========================================
// JSON PARSER
// ===========================================

var bgColor, intColor, strColor, keyColor, defaultColor;
var fontStyle;
var strictOnly, hideDetails;

function onError(error) {
    console.log(error);

console.log looks like debug code. Are you sure you do not want to remove it?

}

function onGot(result) {
    if (result[0]) {
        fontStyle    = result[0].fontStyle    || "Consolas";
        bgColor      = result[0].bgColor      || "#FDF6E3";
        intColor     = result[0].intColor     || "#657A81";
        strColor     = result[0].strColor     || "#2AA198";
        keyColor     = result[0].keyColor     || "#B58900";
        defaultColor = result[0].defaultColor || "#586E75";

        strictOnly   = result[0].strictOnly   || false;
        hideDetails  = result[0].hideDetails  || false;
    } else {
        fontStyle    = result.fontStyle       || "Consolas";
        bgColor      = result.bgColor         || "#FDF6E3";
        intColor     = result.intColor        || "#657A81";
        strColor     = result.strColor        || "#2AA198";
        keyColor     = result.keyColor        || "#B58900";
        defaultColor = result.defaultColor    || "#586E75";

        strictOnly   = result.strictOnly      || false;
        hideDetails  = result.hideDetails     || false;
    }

    var str, jsonpMatch, hovered, tag,
        chrome = this.chrome || this.browser,
        jsonRe = /^\s*(?:\[\s*(?=-?\d|true|false|null|["[{])[^]*\]|\{\s*"[^]+\})\s*$/,
        div = document.createElement("div"),
        body = document.body,
        first = body && body.firstChild,
        mod = /Mac|iPod|iPhone|iPad|Pike/.test(navigator.platform) ? "metaKey" : "ctrlKey",

The variable navigator seems to be never declared. If this is a global, consider adding a /** global: navigator */ comment.

        // rand = Math.random().toString(36).slice(2),
        rand = 1;
        HOV = "H" + rand,

Usage of the sequence operator is discouraged, since it may lead to obfuscated code.

The variable HOV seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.HOV.

        DIV = "D" + rand,

The variable DIV seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.DIV.

        KEY = "K" + rand,

The variable KEY seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.KEY.

        STR = "S" + rand,

The variable STR seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.STR.

        BOOL = "B" + rand,

The variable BOOL seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.BOOL.

        ERR = "E" + rand,

The variable ERR seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.ERR.

        COLL = "C" + rand;

The variable COLL seems to be never declared. Assigning variables without defining them first makes them global. If this was intended, consider making it explicit like using window.COLL.

    function reconvert(str) {
        str = str.replace(/(\\u)(\w{1,4})/gi, function($0) {
            return (String.fromCharCode(parseInt((escape($0).replace(/(%5Cu)(\w{1,4})/g, "$2")), 16)));
        });
        str = str.replace(/(&#x)(\w{1,4});/gi, function($0) {
            return String.fromCharCode(parseInt(escape($0).replace(/(%26%23x)(\w{1,4})(%3B)/g, "$2"), 16));
        });
        str = str.replace(/(&#)(\d{1,6});/gi, function($0) {
            return String.fromCharCode(parseInt(escape($0).replace(/(%26%23)(\d{1,6})(%3B)/g, "$2")));
        });

        return str;
    }

    function units(size) {
        return size > 1048576 ? (0 | (size / 1048576)) + "MB" :
            size > 1024 ? (0 | (size / 1024)) + "KB" :
            size + "B";
    }

    function fragment(a, b) {
        var frag = document.createDocumentFragment();
        frag.appendChild(document.createTextNode(a));
        if (b) {
            frag.appendChild(div.cloneNode());
            frag.appendChild(document.createTextNode(b));
        } else {
            frag.appendChild(document.createElement("br"));
        }
        return frag;
    }

    function change(node, query, name, set) {
        var list = node.querySelectorAll(query),
            i = list.length;
        for (; i--;) list[i].classList[set ? "add" : "remove"](name);

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

    }

    function changeSiblings(node, name, set) {
        var tmp, i = 0,
            query = [];

        for (; node && node.tagName === "I";) {
            tmp = node.previousElementSibling;
            if (tmp && tmp.className == KEY) {
                query.unshift(".D" + rand + ">i.I" + rand + "[data-key='" + node.dataset.key + "']");
            } else if (query[0]) {
                query.unshift(".D" + rand + ">i.I" + rand);
            } else {
                for (; tmp; tmp = tmp.previousElementSibling)
                    if (tmp.tagName === "BR") i++;

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

                query.unshift(".D" + rand + ">" + (i ? "br:nth-of-type(" + i + ")+i.I" + rand : "i.I" + rand + ":first-child"));
            }
            node = node.parentNode && node.parentNode.previousElementSibling;
        }
        if (!query[1]) return;

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

        query[0] = ".R" + rand + ">i.I" + rand;
        change(document, query.join("+"), name, set);
    }

    function keydown(e) {
        if (hovered) {
            e.preventDefault();
            if (e.altKey) {
                changeSiblings(hovered, HOV, 1);
            } else if (e[mod]) {
                change(hovered.nextSibling, "i.I" + rand, HOV, 1);
            }
        }
    }

    function init() {
        tag = document.createElement("style");
        tag.textContent = [
            '.R', ',.D', '{font:16px ' + fontStyle + '}' +
            '.D', '{margin-left:6px; padding-left:1em; margin-top: 1px; border-left:1px dashed; border-color: #93A1A1;}' +
            '.X', '{border:1px solid #ccc; padding:1em}' +
            'a.L', '{text-decoration:none}' +
            'a.L', ':hover,a.L', ':focus{text-decoration:underline}' +
            'i.I', '{cursor:pointer;color:#ccc}' +
            'i.H', ',i.I', ':hover{text-shadow: 1px 1px 3px #999; color:#333}' +
            'i.I', ':before{content:" ▼ "}' +
            'i.C', ':before{content:" ▶ "}' +
            'i.I', ':after{content:attr(data-content)}' +
            'i.C', '+.D', '{width:1px; height:1px; margin:0; padding:0; border:0; display:inline-block; overflow:hidden}' +
            '.S', '{color:' + strColor + '}' + // string
            '.K', '{color:' + keyColor + '}' + // key
            '.E', '{color:#BCADAD}' + // error
            '.B', '{color:' + intColor + '}' + // number and bool
            '.E', ',.B', '{font-style: italic}' + // number bold
            'h3.E', '{margin:0 0 1em}'
        ].join(rand);

        tag.textContent = tag.textContent + 'body {background: ' + bgColor + '; color:' + defaultColor + ';}';

        div.classList.add(DIV);
        document.head.appendChild(tag);
        document.addEventListener("keydown", keydown);
        document.addEventListener("keyup", function(e) {

The parameter e is not used and could be removed.

            if (hovered) change(document, "." + HOV, HOV);

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

        })
        document.addEventListener("mouseover", function(e) {
            if (e.target.tagName === "I") {
                hovered = e.target;
                keydown(e);
            }
        })
        document.addEventListener("mouseout", function(e) {

The parameter e is not used and could be removed.

            if (hovered) {
                change(document, "." + HOV, HOV);
                hovered = null;
            }
        })
    }

    function draw(str, to, first, box) {
        tag || init();

        var re = /("(?:((?:https?|file):\/\/(?:\\?\S)+?)|(?:\\?.)*?)")\s*(:?)|-?\d+\.?\d*(?:e[+-]?\d+)?|true|false|null|[[\]{},]|(\S[^-[\]{},"\d]*)/gi,
            node = div.cloneNode(),
            link = document.createElement("a"),
            span = document.createElement("span"),
            info = document.createElement("i"),
            colon = document.createTextNode(": "),
            comma = fragment(","),
            path = [],
            cache = {
                "{": fragment("{", "}"),
                "[": fragment("[", "]")
            };

        node.className = "R" + rand + (box ? " " + box : "");

        link.classList.add("L" + rand);
        info.classList.add("I" + rand);

        to.addEventListener("click", function(e) {
            var target = e.target,
                open = target.classList.contains(COLL);
            if (target.tagName == "I") {
                if (e.altKey) {
                    changeSiblings(target, COLL, !open);
                } else if (e[mod]) {
                    open = target.nextSibling.querySelector("i");
                    if (open) change(target.nextSibling, "i", COLL, !open.classList.contains(COLL));

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

                } else {
                    target.classList[open ? "remove" : "add"](COLL);
                }
            }
        }, true);

        to.replaceChild(box = node, first);
        loop(str, re);

        function loop(str, re) {
            str = reconvert(str);
            var match, val, tmp, i = 0,
                len = str.length;
            try {
                for (; match = re.exec(str);) {
                    val = match[0];
                    if (val == "{" || val == "[") {
                        path.push(node);

The variable node is changed as part of the for loop for example by node.lastChild.previousSibling on line 239. Only the value of the last iteration will be visible in this function if it is called after the loop.

                        node.appendChild(cache[val].cloneNode(true));
                        node = node.lastChild.previousSibling;
                        node.len = 1;
                        node.start = re.lastIndex;
                    } else if ((val == "}" || val == "]") && node.len) {
                        if (node.childNodes.length) {
                            tmp = info.cloneNode();
                            if (!hideDetails) {
                                tmp.dataset.content = node.len + (
                                    node.len == 1 ?
                                    (val == "]" ? " item, " : " property, ") :
                                    (val == "]" ? " items, " : " properties, ")
                                ) + units(re.lastIndex - node.start + 1);
                            }

                            if ((val = node.previousElementSibling) && val.className == KEY) {
                                tmp.dataset.key = reconvert(val.textContent.slice(1, -1).replace(/'/, "\\'"));
                            }
                            node.parentNode.insertBefore(tmp, node);
                        } else {
                            node.parentNode.removeChild(node);
                        }
                        node = path.pop();
                    } else if (val == ",") {
                        node.len += 1;
                        node.appendChild(comma.cloneNode(true));
                    } else {
                        if (match[2]) {
                            tmp = link.cloneNode();
                            tmp.href = match[2].replace(/\\"/g, '"');
                        } else {
                            tmp = span.cloneNode();
                        }
                        tmp.textContent = match[1] || val;
                        tmp.classList.add(match[3] ? KEY : match[1] ? STR : match[4] ? ERR : BOOL);
                        node.appendChild(tmp);
                        if (match[3]) {
                            node.appendChild(colon.cloneNode());
                        }
                    }
                    if (++i > 1000) {
                        document.title = (0 | (100 * re.lastIndex / len)) + "% of " + units(len);
                        return setTimeout(function() {
                            loop(str, re)
                        });
                    }
                }
                document.title = ""
                JSON.parse(str)

There is no return statement in this branch, but you do return something in other branches. Did you maybe miss it? If you do not want to return anything, consider adding return undefined; explicitly.

            } catch (e) {
                tmp = document.createElement("h3");
                tmp.className = ERR;
                tmp.textContent = e;
                box.insertBefore(tmp, box.firstChild);

There is no return statement in this branch, but you do return something in other branches. Did you maybe miss it? If you do not want to return anything, consider adding return undefined; explicitly.

            }
        }
    }

    if (strictOnly) {
        // only render when the contentType is json
        if (/[+\/]json$/i.test(document.contentType)) {
            draw(str, body, first)

The variable str seems to be never initialized.

        }
    } else {
        // check whether the content is json or like json
        if (first &&
            (first.tagName == "PRE" &&
                first == body.lastElementChild ||
                first == body.lastChild &&
                first.nodeType == 3) &&
            (str = first.textContent) &&
            (/[+\/]json$/i.test(document.contentType) ||
                (jsonpMatch = /^\s*((?:\/\*\*\/\s*)?([$a-z_][$\w]*)\s*(?:&&\s*\2\s*)?\()([^]+)(\)[\s;]*)$/i.exec(str)) &&
                jsonRe.test(jsonpMatch[3]) || jsonRe.test(str))) {
            if (jsonpMatch) {
                str = jsonpMatch[3]
                body.replaceChild(fragment(jsonpMatch[1], jsonpMatch[4]), first)
                first = body.lastChild.previousSibling
            }
            draw(str, body, first)
        }
    }

    chrome.runtime.onMessage.addListener(function(req, sender, sendResponse) {

The parameter sendResponse is not used and could be removed.

The parameter sender is not used and could be removed.

        var node,
            sel = window.getSelection(),
            range = sel.rangeCount && sel.getRangeAt(0),
            str = range && range.toString()

        if (!str) return

Curly braces around statements make for more readable code and help prevent bugs when you add further statements.

        if (req.op === "formatSelection") {
            node = document.createElement("div")
            range.deleteContents()
            range.insertNode(node)
            sel.removeAllRanges()
            draw(str, node.parentNode, node, "X" + rand)
        }
    })
}

function formatJson(json, options) {
    var reg = null,

The assignment to reg seems to be never used. If you intend to free memory here, this is not necessary since the variable leaves the scope anyway.

        formatted = '',
        pad = 0,
        PADDING = '    ';
    options = options || {};
    options.newlineAfterColonIfBeforeBraceOrBracket = (options.newlineAfterColonIfBeforeBraceOrBracket === true) ? true : false;
    options.spaceAfterColon = (options.spaceAfterColon === false) ? false : true;
    if (typeof json !== 'string') {
        json = JSON.stringify(json);
    } else {
        json = JSON.parse(json);
        json = JSON.stringify(json);
    }
    reg = /([\{\}])/g;
    json = json.replace(reg, '\r\n$1\r\n');
    reg = /([\[\]])/g;
    json = json.replace(reg, '\r\n$1\r\n');
    reg = /(\,)/g;
    json = json.replace(reg, '$1\r\n');
    reg = /(\r\n\r\n)/g;
    json = json.replace(reg, '\r\n');
    reg = /\r\n\,/g;
    json = json.replace(reg, ',');
    if (!options.newlineAfterColonIfBeforeBraceOrBracket) {
        reg = /\:\r\n\{/g;
        json = json.replace(reg, ':{');
        reg = /\:\r\n\[/g;
        json = json.replace(reg, ':[');
    }
    if (options.spaceAfterColon) {
        reg = /\:/g;
        json = json.replace(reg, ':');
    }(json.split('\r\n')).forEach(function (node, index) {

The parameter index is not used and could be removed.

        var i = 0,
            indent = 0,
            padding = '';
        if (node.match(/\{$/) || node.match(/\[$/)) {
            indent = 1;
        } else if (node.match(/\}/) || node.match(/\]/)) {
            if (pad !== 0) {
                pad -= 1;
            }
        } else {
            indent = 0;
        }
        for (i = 0; i < pad; i++) {
            padding += PADDING;
        }
        formatted += padding + node + '\r\n';
        pad += indent;
    }
    );
    return formatted;
};

function isJSON(str) {
    if (typeof str == 'string') {
        try {
            var obj = JSON.parse(str);

The variable obj seems to be never used. Consider removing it.

            if (str.indexOf('{') > - 1) {
                return true;
            } else {
                return false;
            }
        } catch (e) {
            return false;
        }
    }
    return false;
}

function onParse() {
    var items = document.getElementsByClassName('S1');
    for (var i = 0; i < items.length; i++) {
        try {
            var json = (eval(items[i].innerHTML));

Calls to eval are slow and potentially dangerous, especially on untrusted code. Please consider whether there is another way to achieve your goal.

            if (isJSON(json)) {
                var formated = formatJson(json);
                items[i].onclick = function() {
                    alert(formated);

The variable formated is changed as part of the for loop for example by formatJson(json) on line 417. Only the value of the last iteration will be visible in this function if it is called after the loop.

                }
            }
        } catch (e) {}

Empty catch clauses should be used with caution; consider adding a comment why this is needed.

    }
}

var getting = browser.storage.local.get();

The variable browser seems to be never declared. If this is a global, consider adding a /** global: browser */ comment.

getting.then(onGot, onError).then(onParse, onError);