Current Dev State

static/js/ketcher2/node_modules/eslint/lib/util/source-code-fixer.js

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+/**
+ * @fileoverview An object that caches and applies source code fixes.
+ * @author Nicholas C. Zakas
+ */
+"use strict";
+
+//------------------------------------------------------------------------------
+// Requirements
+//------------------------------------------------------------------------------
+
+const debug = require("debug")("eslint:text-fixer");
+
+//------------------------------------------------------------------------------
+// Helpers
+//------------------------------------------------------------------------------
+
+const BOM = "\uFEFF";
+
+/**
+ * Compares items in a messages array by range.
+ * @param {Message} a The first message.
+ * @param {Message} b The second message.
+ * @returns {int} -1 if a comes before b, 1 if a comes after b, 0 if equal.
+ * @private
+ */
+function compareMessagesByFixRange(a, b) {
+    return a.fix.range[0] - b.fix.range[0] || a.fix.range[1] - b.fix.range[1];
+}
+
+/**
+ * Compares items in a messages array by line and column.
+ * @param {Message} a The first message.
+ * @param {Message} b The second message.
+ * @returns {int} -1 if a comes before b, 1 if a comes after b, 0 if equal.
+ * @private
+ */
+function compareMessagesByLocation(a, b) {
+    return a.line - b.line || a.column - b.column;
+}
+
+//------------------------------------------------------------------------------
+// Public Interface
+//------------------------------------------------------------------------------
+
+/**
+ * Utility for apply fixes to source code.
+ * @constructor
+ */
+function SourceCodeFixer() {
+    Object.freeze(this);
+}
+
+/**
+ * Applies the fixes specified by the messages to the given text. Tries to be
+ * smart about the fixes and won't apply fixes over the same area in the text.
+ * @param {SourceCode} sourceCode The source code to apply the changes to.
+ * @param {Message[]} messages The array of messages reported by ESLint.
+ * @returns {Object} An object containing the fixed text and any unfixed messages.
+ */
+SourceCodeFixer.applyFixes = function(sourceCode, messages) {
+
+    debug("Applying fixes");
+
+    if (!sourceCode) {
+        debug("No source code to fix");
+        return {
+            fixed: false,
+            messages,
+            output: ""
+        };
+    }
+
+    // clone the array
+    const remainingMessages = [],
+        fixes = [],
+        bom = (sourceCode.hasBOM ? BOM : ""),
+        text = sourceCode.text;
+    let lastPos = Number.NEGATIVE_INFINITY,
+        output = bom;
+
+    messages.forEach(problem => {
+        if (problem.hasOwnProperty("fix")) {
+            fixes.push(problem);
+        } else {
+            remainingMessages.push(problem);
+        }
+    });
+
+    if (fixes.length) {
+        debug("Found fixes to apply");
+
+        for (const problem of fixes.sort(compareMessagesByFixRange)) {
+            const fix = problem.fix;
+            const start = fix.range[0];
+            const end = fix.range[1];
+
+            // Remain it as a problem if it's overlapped or it's a negative range
+            if (lastPos >= start || start > end) {
+                remainingMessages.push(problem);
+                continue;
+            }
+
+            // Remove BOM.
+            if ((start < 0 && end >= 0) || (start === 0 && fix.text.startsWith(BOM))) {
+                output = "";
+            }
+
+            // Make output to this fix.
+            output += text.slice(Math.max(0, lastPos), Math.max(0, start));
+            output += fix.text;
+            lastPos = end;
+        }
+        output += text.slice(Math.max(0, lastPos));
+
+        return {
+            fixed: true,
+            messages: remainingMessages.sort(compareMessagesByLocation),
+            output
+        };
+    }
+
+    debug("No fixes to apply");
+    return {
+        fixed: false,
+        messages,
+        output: bom + text
+    };
+
+};
+
+module.exports = SourceCodeFixer;