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renderjson.js
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renderjson.js
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// Copyright © 2013-2014 David Caldwell <[email protected]>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
// Usage
// -----
// The module exports one entry point, the `renderjson()` function. It takes in
// the JSON you want to render as a single argument and returns an HTML
// element.
//
// Options
// -------
// renderjson.set_icons("+", "-")
// This Allows you to override the disclosure icons.
//
// renderjson.set_show_to_level(level)
// Pass the number of levels to expand when rendering. The default is 0, which
// starts with everything collapsed. As a special case, if level is the string
// "all" then it will start with everything expanded.
//
// renderjson.set_max_string_length(length)
// Strings will be truncated and made expandable if they are longer than
// `length`. As a special case, if `length` is the string "none" then
// there will be no truncation. The default is "none".
//
// renderjson.set_sort_objects(sort_bool)
// Sort objects by key (default: false)
//
// Theming
// -------
// The HTML output uses a number of classes so that you can theme it the way
// you'd like:
// .disclosure ("⊕", "⊖")
// .syntax (",", ":", "{", "}", "[", "]")
// .string (includes quotes)
// .number
// .boolean
// .key (object key)
// .keyword ("null", "undefined")
// .object.syntax ("{", "}")
// .array.syntax ("[", "]")
var module;
(module||{}).exports = renderjson = (function() {
var themetext = function(/* [class, text]+ */) {
var spans = [];
while (arguments.length)
spans.push(append(span(Array.prototype.shift.call(arguments)),
text(Array.prototype.shift.call(arguments))));
return spans;
};
var append = function(/* el, ... */) {
var el = Array.prototype.shift.call(arguments);
for (var a=0; a<arguments.length; a++)
if (arguments[a].constructor == Array)
append.apply(this, [el].concat(arguments[a]));
else
el.appendChild(arguments[a]);
return el;
};
var prepend = function(el, child) {
el.insertBefore(child, el.firstChild);
return el;
}
var isempty = function(obj) { for (var k in obj) if (obj.hasOwnProperty(k)) return false;
return true; }
var text = function(txt) { return document.createTextNode(txt) };
var div = function() { return document.createElement("div") };
var span = function(classname) { var s = document.createElement("span");
if (classname) s.className = classname;
return s; };
var A = function A(txt, classname, callback) { var a = document.createElement("a");
if (classname) a.className = classname;
a.appendChild(text(txt));
a.href = '#';
a.onclick = function() { callback(); return false; };
return a; };
function _renderjson(json, indent, dont_indent, show_level, max_string, sort_objects) {
var my_indent = dont_indent ? "" : indent;
var disclosure = function(open, placeholder, close, type, builder) {
var content;
var empty = span(type);
var show = function() { if (!content) append(empty.parentNode,
content = prepend(builder(),
A(renderjson.hide, "disclosure",
function() { content.style.display="none";
empty.style.display="inline"; } )));
content.style.display="inline";
empty.style.display="none"; };
append(empty,
A(renderjson.show, "disclosure", show),
themetext(type+ " syntax", open),
A(placeholder, null, show),
themetext(type+ " syntax", close));
var el = append(span(), text(my_indent.slice(0,-1)), empty);
if (show_level > 0)
show();
return el;
};
if (json === null) return themetext(null, my_indent, "keyword", "null");
if (json === void 0) return themetext(null, my_indent, "keyword", "undefined");
if (typeof(json) == "string" && json.length > max_string)
return disclosure('"', json.substr(0,max_string)+" ...", '"', "string", function () {
return append(span("string"), themetext(null, my_indent, "string", JSON.stringify(json)));
});
if (typeof(json) != "object") // Strings, numbers and bools
return themetext(null, my_indent, typeof(json), JSON.stringify(json));
if (json.constructor == Array) {
if (json.length == 0) return themetext(null, my_indent, "array syntax", "[]");
return disclosure("[", " ... ", "]", "array", function () {
var as = append(span("array"), themetext("array syntax", "[", null, "\n"));
for (var i=0; i<json.length; i++)
append(as,
_renderjson(json[i], indent+" ", false, show_level-1, max_string, sort_objects),
i != json.length-1 ? themetext("syntax", ",") : [],
text("\n"));
append(as, themetext(null, indent, "array syntax", "]"));
return as;
});
}
// object
if (isempty(json))
return themetext(null, my_indent, "object syntax", "{}");
return disclosure("{", "...", "}", "object", function () {
var os = append(span("object"), themetext("object syntax", "{", null, "\n"));
for (var k in json) var last = k;
var keys = Object.keys(json);
if (sort_objects)
keys = keys.sort();
for (var i in keys) {
var k = keys[i];
append(os, themetext(null, indent+" ", "key", '"'+k+'"', "object syntax", ': '),
_renderjson(json[k], indent+" ", true, show_level-1, max_string, sort_objects),
k != last ? themetext("syntax", ",") : [],
text("\n"));
}
append(os, themetext(null, indent, "object syntax", "}"));
return os;
});
}
var renderjson = function renderjson(json)
{
var pre = append(document.createElement("pre"), _renderjson(json, "", false, renderjson.show_to_level, renderjson.max_string_length, renderjson.sort_objects));
pre.className = "renderjson";
return pre;
}
renderjson.set_icons = function(show, hide) { renderjson.show = show;
renderjson.hide = hide;
return renderjson; };
renderjson.set_show_to_level = function(level) { renderjson.show_to_level = typeof level == "string" &&
level.toLowerCase() === "all" ? Number.MAX_VALUE
: level;
return renderjson; };
renderjson.set_max_string_length = function(length) { renderjson.max_string_length = typeof length == "string" &&
length.toLowerCase() === "none" ? Number.MAX_VALUE
: length;
return renderjson; };
renderjson.set_sort_objects = function(sort_bool) { renderjson.sort_objects = sort_bool;
return renderjson; };
// Backwards compatiblity. Use set_show_to_level() for new code.
renderjson.set_show_by_default = function(show) { renderjson.show_to_level = show ? Number.MAX_VALUE : 0;
return renderjson; };
renderjson.set_icons('⊕', '⊖');
renderjson.set_show_by_default(false);
renderjson.set_sort_objects(false);
renderjson.set_max_string_length("none");
return renderjson;
})();