mirror of https://github.com/status-im/metro.git
[ReactNative] Bring in node console.log formatting
Summary:
@public
The current output of console.log is extremely bad. If you pass NaN, it shows up as null (super confusing I know -_-), if you pass a cyclical object, it just says that it is cyclic and that's it. It doesn't print up the first few levels which are NOT cyclical and would be really helpful.
It turns out that nodejs console.log pretty printer is really awesome and can be easily extracted as a few hundred lines. This is going to be such a productivity boost that I think it's the right tradeoff to embed it like this
Test Plan:
```
var a = {kikoo: {lol: 1}}
a.kikoo.nice = a;
console.log(a);
> { kikoo: { lol: 1, nice: [Circular] } }
console.log(NaN)
> NaN
```
This commit is contained in:
Christopher Chedeau
parent
fca872fac2
commit
fef3c7294d
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@ -11,12 +11,352 @@
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*
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* @provides console
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* @polyfill
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* @nolint
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*/
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/*eslint global-strict:0*/
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(function(global) {
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'use strict';
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var inspect = (function() {
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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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//
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// https://github.com/joyent/node/blob/master/lib/util.js
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function inspect(obj, opts) {
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var ctx = {
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seen: [],
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stylize: stylizeNoColor
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};
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return formatValue(ctx, obj, opts.depth);
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}
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function stylizeNoColor(str, styleType) {
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return str;
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}
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function arrayToHash(array) {
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var hash = {};
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array.forEach(function(val, idx) {
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hash[val] = true;
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});
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return hash;
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}
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function formatValue(ctx, value, recurseTimes) {
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// Primitive types cannot have properties
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var primitive = formatPrimitive(ctx, value);
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if (primitive) {
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return primitive;
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}
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// Look up the keys of the object.
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var keys = Object.keys(value);
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var visibleKeys = arrayToHash(keys);
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// IE doesn't make error fields non-enumerable
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// http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
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if (isError(value)
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&& (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
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return formatError(value);
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}
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// Some type of object without properties can be shortcutted.
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if (keys.length === 0) {
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if (isFunction(value)) {
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var name = value.name ? ': ' + value.name : '';
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return ctx.stylize('[Function' + name + ']', 'special');
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}
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if (isRegExp(value)) {
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return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
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}
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if (isDate(value)) {
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return ctx.stylize(Date.prototype.toString.call(value), 'date');
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}
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if (isError(value)) {
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return formatError(value);
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}
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}
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var base = '', array = false, braces = ['{', '}'];
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// Make Array say that they are Array
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if (isArray(value)) {
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array = true;
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braces = ['[', ']'];
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}
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// Make functions say that they are functions
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if (isFunction(value)) {
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var n = value.name ? ': ' + value.name : '';
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base = ' [Function' + n + ']';
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}
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// Make RegExps say that they are RegExps
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if (isRegExp(value)) {
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base = ' ' + RegExp.prototype.toString.call(value);
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}
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// Make dates with properties first say the date
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if (isDate(value)) {
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base = ' ' + Date.prototype.toUTCString.call(value);
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}
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// Make error with message first say the error
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if (isError(value)) {
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base = ' ' + formatError(value);
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}
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if (keys.length === 0 && (!array || value.length == 0)) {
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return braces[0] + base + braces[1];
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}
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if (recurseTimes < 0) {
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if (isRegExp(value)) {
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return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
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} else {
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return ctx.stylize('[Object]', 'special');
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}
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}
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ctx.seen.push(value);
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var output;
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if (array) {
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output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
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} else {
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output = keys.map(function(key) {
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return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
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});
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}
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ctx.seen.pop();
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return reduceToSingleString(output, base, braces);
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}
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function formatPrimitive(ctx, value) {
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if (isUndefined(value))
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return ctx.stylize('undefined', 'undefined');
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if (isString(value)) {
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var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
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.replace(/'/g, "\\'")
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.replace(/\\"/g, '"') + '\'';
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return ctx.stylize(simple, 'string');
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}
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if (isNumber(value))
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return ctx.stylize('' + value, 'number');
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if (isBoolean(value))
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return ctx.stylize('' + value, 'boolean');
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// For some reason typeof null is "object", so special case here.
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if (isNull(value))
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return ctx.stylize('null', 'null');
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}
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function formatError(value) {
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return '[' + Error.prototype.toString.call(value) + ']';
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}
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function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
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var output = [];
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for (var i = 0, l = value.length; i < l; ++i) {
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if (hasOwnProperty(value, String(i))) {
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output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
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String(i), true));
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} else {
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output.push('');
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}
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}
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keys.forEach(function(key) {
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if (!key.match(/^\d+$/)) {
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output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
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key, true));
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}
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});
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return output;
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}
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function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
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var name, str, desc;
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desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
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if (desc.get) {
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if (desc.set) {
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str = ctx.stylize('[Getter/Setter]', 'special');
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} else {
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str = ctx.stylize('[Getter]', 'special');
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}
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} else {
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if (desc.set) {
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str = ctx.stylize('[Setter]', 'special');
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}
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}
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if (!hasOwnProperty(visibleKeys, key)) {
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name = '[' + key + ']';
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}
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if (!str) {
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if (ctx.seen.indexOf(desc.value) < 0) {
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if (isNull(recurseTimes)) {
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str = formatValue(ctx, desc.value, null);
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} else {
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str = formatValue(ctx, desc.value, recurseTimes - 1);
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}
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if (str.indexOf('\n') > -1) {
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if (array) {
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str = str.split('\n').map(function(line) {
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return ' ' + line;
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}).join('\n').substr(2);
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} else {
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str = '\n' + str.split('\n').map(function(line) {
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return ' ' + line;
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}).join('\n');
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}
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}
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} else {
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str = ctx.stylize('[Circular]', 'special');
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}
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}
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if (isUndefined(name)) {
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if (array && key.match(/^\d+$/)) {
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return str;
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}
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name = JSON.stringify('' + key);
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if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
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name = name.substr(1, name.length - 2);
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name = ctx.stylize(name, 'name');
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} else {
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name = name.replace(/'/g, "\\'")
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.replace(/\\"/g, '"')
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.replace(/(^"|"$)/g, "'");
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name = ctx.stylize(name, 'string');
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}
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}
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return name + ': ' + str;
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}
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function reduceToSingleString(output, base, braces) {
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var numLinesEst = 0;
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var length = output.reduce(function(prev, cur) {
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numLinesEst++;
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if (cur.indexOf('\n') >= 0) numLinesEst++;
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return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
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}, 0);
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if (length > 60) {
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return braces[0] +
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(base === '' ? '' : base + '\n ') +
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' ' +
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output.join(',\n ') +
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' ' +
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braces[1];
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}
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return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
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}
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// NOTE: These type checking functions intentionally don't use `instanceof`
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// because it is fragile and can be easily faked with `Object.create()`.
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function isArray(ar) {
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return Array.isArray(ar);
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}
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function isBoolean(arg) {
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return typeof arg === 'boolean';
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}
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function isNull(arg) {
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return arg === null;
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}
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function isNullOrUndefined(arg) {
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return arg == null;
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}
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function isNumber(arg) {
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return typeof arg === 'number';
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}
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function isString(arg) {
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return typeof arg === 'string';
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}
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function isSymbol(arg) {
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return typeof arg === 'symbol';
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}
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function isUndefined(arg) {
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return arg === void 0;
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}
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function isRegExp(re) {
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return isObject(re) && objectToString(re) === '[object RegExp]';
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}
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function isObject(arg) {
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return typeof arg === 'object' && arg !== null;
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}
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function isDate(d) {
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return isObject(d) && objectToString(d) === '[object Date]';
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}
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function isError(e) {
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return isObject(e) &&
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(objectToString(e) === '[object Error]' || e instanceof Error);
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}
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function isFunction(arg) {
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return typeof arg === 'function';
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}
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function isPrimitive(arg) {
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return arg === null ||
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typeof arg === 'boolean' ||
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typeof arg === 'number' ||
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typeof arg === 'string' ||
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typeof arg === 'symbol' || // ES6 symbol
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typeof arg === 'undefined';
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}
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function objectToString(o) {
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return Object.prototype.toString.call(o);
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}
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function hasOwnProperty(obj, prop) {
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return Object.prototype.hasOwnProperty.call(obj, prop);
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}
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return inspect;
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})();
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var OBJECT_COLUMN_NAME = '(index)';
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var LOG_LEVELS = {
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trace: 0,
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@ -27,7 +367,6 @@
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};
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function setupConsole(global) {
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if (!global.nativeLoggingHook) {
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return;
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}
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@ -35,34 +374,7 @@
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function getNativeLogFunction(level) {
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return function() {
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var str = Array.prototype.map.call(arguments, function(arg) {
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var ret;
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var type = typeof arg;
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if (arg === null) {
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ret = 'null';
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} else if (arg === undefined) {
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ret = 'undefined';
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} else if (type === 'string') {
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ret = '"' + arg + '"';
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} else if (type === 'function') {
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try {
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ret = arg.toString();
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} catch (e) {
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ret = '[function unknown]';
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}
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} else {
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// Perform a try catch, just in case the object has a circular
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// reference or stringify throws for some other reason.
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try {
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ret = JSON.stringify(arg);
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} catch (e) {
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if (typeof arg.toString === 'function') {
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try {
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ret = arg.toString();
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} catch (E) {}
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}
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}
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}
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return ret || '["' + type + '" failed to stringify]';
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return inspect(arg, {depth: 10});
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}).join(', ');
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global.nativeLoggingHook(str, level);
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};
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