Highlighting

core/highlight.js

@@ -0,0 +1,96 @@
+/**
+ * @fileoverview Highlighting methods.
+ * These methods are specific to highlighting
+ */
+
+/**
+ * @name Blockly.Highlight
+ * @namespace
+ **/
+goog.provide('Blockly.Highlight');
+
+goog.require('goog.dom');
+
+/**
+ * Highlight a single value
+ * @param {value} The value to highlight
+ * @param {?type} The type of the value
+ */
+Blockly.Highlight.highlightSingle = function highlightSingle(value, type) {
+  // @todo Pick better colours
+  const node = goog.dom.createElement('span');
+  node.textContent = value;
+  node.style = `color: ${({
+    // Text part definitions
+    'text': '#ffffff',
+    'Infinity': '#9966ff',
+    'null': '#898196',
+    'object.openParenth': '#cf63cf',
+    'object.closeParenth': '#cf63cf',
+    'object.openBracket': '#cf63cf',
+    'object.closeBracket': '#cf63cf',
+    // typeof definitions
+    // Objects + Arrays can be skipped as they have custom definitions
+    'number': '#9966ff',
+    'string': '#5cb1d6',
+    'boolean': '#ff8c1a',
+    // @todo Check if this is even needed smh
+    'undefined': '#898196',
+  })[type || (typeof value)] || '#ffffff'};`;
+  return node;
+}
+/**
+ * Highlight a full value (This will generate the structure for objects)
+ * @param {value} The value to highlight
+ * @param {type} The type of the value
+ */
+Blockly.Highlight.highlight = function highlight(value, type) {
+  // @todo Should we do what JSON.parse does and just delete these values?
+  if (value === undefined) {
+    value = 'null';
+    type = 'undefined';
+  } else if (value === null) {
+    value = 'null';
+    type = 'null';
+  } else if (value === Infinity) {
+    value = 'Infinity';
+    type = 'Infinity';
+  }
+  if (type === 'object' && typeof value === 'string') {
+    try {
+      value = JSON.parse(value);
+    } catch {
+      // @todo Maybe dont do this?
+      value = 'undefined';
+    }
+  }
+  let node = goog.dom.createElement('span');
+  if (type === 'object' && typeof node === 'object') {
+    if (Array.isArray(value)) {
+      const valueCount = value.length, valueCountComma = valueCount - 1;
+      node.appendChild(this.highlightSingle('[', 'object.openBracket'));
+      for (let i = 0; i < valueCount; i++) {
+        let item = value[i];
+        if (typeof item === 'string') item = `"${item.replaceAll('"', '\\"')}"`;
+        node.appendChild(this.highlight(item, typeof item));
+        if (i < valueCountComma) node.appendChild(highlightSingle(',', 'text'));
+      }
+      node.appendChild(this.highlightSingle(']', 'object.closeBracket'));
+    } else {
+      node.appendChild(this.highlightSingle('{', 'object.openParenth'));
+      const entrys = Object.entries(value), entryCount = entrys.length, entryCountComma = entryCount - 1;
+      for (let i = 0; i < entryCount; i++) {
+        const entry = entrys[i];
+        if (typeof entry[0] === 'string') entry[0] = `"${entry[0].replaceAll('"', '\\"')}"`;
+        if (typeof entry[1] === 'string') entry[1] = `"${entry[1].replaceAll('"', '\\"')}"`;
+        node.appendChild(this.highlight(entry[0], typeof entry[0]));
+        node.appendChild(this.highlightSingle(': ', 'text'));
+        node.appendChild(this.highlight(entry[1], typeof entry[1]));
+        if (i < entryCountComma) node.appendChild(this.highlightSingle(',', 'text'));
+      }
+      node.appendChild(this.highlightSingle('}', 'object.closeParenth'));
+    }
+  } else node.appendChild(this.highlightSingle(value, type));
+  return node;
+};
+