Ubiquity JSON Pretty Printer

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/*
    json2.js
    2008-03-14
 
    Public Domain
 
    No warranty expressed or implied. Use at your own risk.
 
    See http://www.JSON.org/js.html
 
    This is a reference implementation. You are free to copy, modify, or
    redistribute.
*/
 
if (!this.JSON) {
 
    JSON = function () {
 
        function f(n) {    // Format integers to have at least two digits.
            return n < 10 ? '0' + n : n;
        }
 
        Date.prototype.toJSON = function () {
            return this.getUTCFullYear()   + '-' +
                 f(this.getUTCMonth() + 1) + '-' +
                 f(this.getUTCDate())      + 'T' +
                 f(this.getUTCHours())     + ':' +
                 f(this.getUTCMinutes())   + ':' +
                 f(this.getUTCSeconds())   + 'Z';
        };
 
 
        var m = {    // table of character substitutions
            '\b': '\\b',
            '\t': '\\t',
            '\n': '\\n',
            '\f': '\\f',
            '\r': '\\r',
            '"' : '\\"',
            '\\': '\\\\'
        };
 
        function stringify(value, whitelist) {
            var a,          // The array holding the partial texts.
                i,          // The loop counter.
                k,          // The member key.
                l,          // Length.
                r = /["\\\x00-\x1f\x7f-\x9f]/g,
                v;          // The member value.
 
            switch (typeof value) {
            case 'string':
 
                return r.test(value) ?
                    '"' + value.replace(r, function (a) {
                        var c = m[a];
                        if (c) {
                            return c;
                        }
                        c = a.charCodeAt();
                        return '\\u00' + Math.floor(c / 16).toString(16) +
                                                   (c % 16).toString(16);
                    }) + '"' :
                    '"' + value + '"';
 
            case 'number':
 
                return isFinite(value) ? String(value) : 'null';
 
            case 'boolean':
            case 'null':
                return String(value);
 
            case 'object':
 
                if (!value) {
                    return 'null';
                }
 
                if (typeof value.toJSON === 'function') {
                    return stringify(value.toJSON());
                }
                a = [];
                if (typeof value.length === 'number' &&
                        !(value.propertyIsEnumerable('length'))) {
 
                    l = value.length;
                    for (i = 0; i < l; i += 1) {
                        a.push(stringify(value[i], whitelist) || 'null');
                    }
 
                    return '[' + a.join(',') + ']';
                }
                if (whitelist) {
                    l = whitelist.length;
                    for (i = 0; i < l; i += 1) {
                        k = whitelist[i];
                        if (typeof k === 'string') {
                            v = stringify(value[k], whitelist);
                            if (v) {
                                a.push(stringify(k) + ':' + v);
                            }
                        }
                    }
                } else {
 
                    for (k in value) {
                        if (typeof k === 'string') {
                            v = stringify(value[k], whitelist);
                            if (v) {
                                a.push(stringify(k) + ':' + v);
                            }
                        }
                    }
                }
 
                return '{' + a.join(',') + '}';
            }
        }
 
        return {
            stringify: stringify,
            parse: function (text, filter) {
                var j;
 
                function walk(k, v) {
                    var i, n;
                    if (v && typeof v === 'object') {
                        for (i in v) {
                            if (Object.prototype.hasOwnProperty.apply(v, [i])) {
                                n = walk(i, v[i]);
                                if (n !== undefined) {
                                    v[i] = n;
                                } else {
                                    delete v[i];
                                }
                            }
                        }
                    }
                    return filter(k, v);
                }
 
                if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
 
                    j = eval('(' + text + ')');
 
                    return typeof filter === 'function' ? walk('', j) : j;
                }
 
                throw new SyntaxError('parseJSON');
            }
        };
    }();
}
 
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License.  You may obtain a copy
// of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
// License for the specific language governing permissions and limitations under
// the License.
 
// JSON pretty printing
 
function prettyPrintJSON(val, indent, linesep, depth) {
  indent = indent != null ? indent : 4;
  linesep = linesep != null ? linesep : "\n";
  depth = depth != null ? depth : 1;
  var propsep = linesep.length ? "," + linesep : ", ";
  var tab = [];
  for (var i = 0; i < indent * depth; i++) tab.push("");
  tab = tab.join(" ");
  switch (typeof val) {
    case "boolean":
    case "number":
    case "string":
      return "<span class=\"__v__ __"+(typeof val)+"__\">"+JSON.stringify(val)+"</span>";
    case "object": {
      if (val === null) return "null";
      if (val.constructor == Date) return JSON.stringify(val);
      var buf = [];
      if (val.constructor == Array) {
        buf.push("[");
        for (var index = 0; index < val.length; index++) {
          buf.push(index > 0 ? propsep : linesep);
          buf.push(
            tab, prettyPrintJSON(val[index], indent, linesep, depth + 1)
          );
        }
        if (index >= 0) buf.push(linesep, tab.substr(indent));
        buf.push("]");
      } else {
        buf.push("{");
        var index = 0;
        for (var key in val) {
          if (!val.hasOwnProperty(key)) continue;
          buf.push(index > 0 ? propsep : linesep);
          buf.push(
            tab, '<span class="__k__">', JSON.stringify(key), "</span>: ",
            prettyPrintJSON(val[key], indent, linesep, depth + 1)
          );
          index++;
        }
        if (index >= 0) buf.push(linesep, tab.substr(indent));
        buf.push("}");
      }
      return buf.join("");
    }
  }
}
 
var template =
'<style type="text/css">.__pretty__container{font-family: monospace; white-space: pre; color: #333;} .__k__{color: #000;} .__number__,.__boolean__{color: #33aa33;}</style><span class="__pretty__container">${json}</span>';

function pageLoad_json_pretty(doc){
  var uri = doc.documentURI;
  if(!(uri.substr(0,4) == "http" || uri.substr(0,4) == "file"))
    return;
  if(doc.contentType != "text/plain")
    return;
  var text = doc.body.firstChild.textContent;
  if(text.substr(0,1) != '{')
    return;
  try{
        doc.defaultView.location = "javascript:document.open();document.write(atob(\""+doc.defaultView.btoa(CmdUtils.renderTemplate(
          template,
          {"json": prettyPrintJSON(JSON.parse(text))}
        ))+"\"));document.close()";
  } catch (e){}
}
 
CmdUtils.CreateCommand({
  name: "json-prettyprint",
  //icon: "http://example.com/example.png",
  homepage: "http://gr.ayre.st/commands/",
  author: { name: "Karl Guertin", email: "[email protected]"},
  license: "Public Domain",
  description: "Pretty prints the selected JSON",
  //help: "how to use your command",
  takes: {"input": noun_arb_text},
  execute: function(input) {
   try{
  CmdUtils.setSelection(
    CmdUtils.renderTemplate(
      template,
      {"json": prettyPrintJSON(JSON.parse(input.text))}
    )
  );
   } catch (e){}
  }
});