V2 (#1)

packages/lib/src/components/DevTool/Console/tools.js

@@ -0,0 +1,94 @@
+
+
+  var DEFAULT_MAX_DEPTH = 3;
+  var DEFAULT_ARRAY_MAX_LENGTH = 50;
+  var seen; // Same variable used for all stringifications
+
+  Date.prototype.toPrunedJSON = Date.prototype.toJSON;
+  String.prototype.toPrunedJSON = String.prototype.toJSON;
+
+  var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+      escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
+      meta = {    // table of character substitutions
+          '\b': '\\b',
+          '\t': '\\t',
+          '\n': '\\n',
+          '\f': '\\f',
+          '\r': '\\r',
+          '"' : '\\"',
+          '\\': '\\\\'
+      };
+
+  function quote(string) {
+      escapable.lastIndex = 0;
+      return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
+          var c = meta[a];
+          return typeof c === 'string'
+              ? c
+              : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
+      }) + '"' : '"' + string + '"';
+  }
+
+  function str(key, holder, depthDecr, arrayMaxLength) {
+      var i,          // The loop counter.
+          k,          // The member key.
+          v,          // The member value.
+          length,
+          partial,
+          value = holder[key];
+      if (value && typeof value === 'object' && typeof value.toPrunedJSON === 'function') {
+          value = value.toPrunedJSON(key);
+      }
+
+      switch (typeof value) {
+      case 'string':
+          return quote(value);
+      case 'number':
+          return isFinite(value) ? String(value) : 'null';
+      case 'boolean':
+      case 'null':
+          return String(value);
+      case 'object':
+          if (!value) {
+              return 'null';
+          }
+          if (depthDecr<=0 || seen.indexOf(value)!==-1) {
+              return '"-pruned-"';
+          }
+          seen.push(value);
+          partial = [];
+          if (Object.prototype.toString.apply(value) === '[object Array]') {
+              length = Math.min(value.length, arrayMaxLength);
+              for (i = 0; i < length; i += 1) {
+                  partial[i] = str(i, value, depthDecr-1, arrayMaxLength) || 'null';
+              }
+              v = partial.length === 0
+                  ? '[]'
+                  : '[' + partial.join(',') + ']';
+              return v;
+          }
+          for (k in value) {
+              if (Object.prototype.hasOwnProperty.call(value, k)) {
+                  try {
+                      v = str(k, value, depthDecr-1, arrayMaxLength);
+                      if (v) partial.push(quote(k) + ':' + v);
+                  } catch (e) { 
+                      // this try/catch due to some "Accessing selectionEnd on an input element that cannot have a selection." on Chrome
+                  }
+              }
+          }
+          v = partial.length === 0
+              ? '{}'
+              : '{' + partial.join(',') + '}';
+          return v;
+      }
+  }
+
+  export default function (value, depthDecr, arrayMaxLength) {
+      seen = [];
+      depthDecr = depthDecr || DEFAULT_MAX_DEPTH;
+      arrayMaxLength = arrayMaxLength || DEFAULT_ARRAY_MAX_LENGTH;
+      const raw = str('', {'': value}, depthDecr, arrayMaxLength);
+      // return JSON.stringify(JSON.parse(raw.root), null, '  ');
+      return raw;
+  };