Add support for endLine and endColumn

Add support for creating a full range from an ESLint message if it
specifies an `endLine` and `endColumn`. Also adds a `validatePoint` helper
function to check that these coordinates given from ESLint are valid since
we no longer have the checking built into `helpers.rangeFromLineNumber`.

lib/helpers.js

@@ -6,6 +6,7 @@ Object.defineProperty(exports, "__esModule", {
 });
 exports.spawnWorker = spawnWorker;
 exports.showError = showError;
+exports.validatePoint = validatePoint;
 
 var _child_process = require('child_process');
 
@@ -61,3 +62,11 @@ function showError(givenMessage) {
     dismissable: true
   });
 }
+
+function validatePoint(textEditor, line, col) {
+  var buffer = textEditor.getBuffer();
+  // Clip the given point to a valid one, and check if it equals the original
+  if (!buffer.clipPosition([line, col]).isEqual([line, col])) {
+    throw new Error(line + ':' + col + ' isn\'t a valid point!');
+  }
+}

lib/main.js

@@ -141,6 +141,8 @@ module.exports = {
             var ruleId = _ref.ruleId;
             var column = _ref.column;
             var fix = _ref.fix;
+            var endLine = _ref.endLine;
+            var endColumn = _ref.endColumn;
 
             var textBuffer = textEditor.getBuffer();
             var linterFix = null;
@@ -152,8 +154,16 @@ module.exports = {
               };
             }
             var range = void 0;
+            var msgLine = line - 1;
+            var msgCol = column ? column - 1 : column;
             try {
-              range = Helpers.rangeFromLineNumber(textEditor, line - 1, column ? column - 1 : column);
+              if (endColumn && endLine) {
+                (0, _helpers.validatePoint)(textEditor, msgLine, msgCol);
+                (0, _helpers.validatePoint)(textEditor, endLine - 1, endColumn - 1);
+                range = [[msgLine, msgCol], [endLine - 1, endColumn - 1]];
+              } else {
+                range = Helpers.rangeFromLineNumber(textEditor, msgLine, msgCol);
+              }
             } catch (err) {
               throw new Error('Cannot mark location in editor for (' + ruleId + ') - (' + message + ')' + (' at line (' + line + ') column (' + column + ')'));
             }

src/helpers.js

@@ -46,3 +46,11 @@ export function showError(givenMessage, givenDetail = null) {
     dismissable: true
   })
 }
+
+export function validatePoint(textEditor, line, col) {
+  const buffer = textEditor.getBuffer()
+  // Clip the given point to a valid one, and check if it equals the original
+  if (!buffer.clipPosition([line, col]).isEqual([line, col])) {
+    throw new Error(`${line}:${col} isn't a valid point!`)
+  }
+}

src/main.js

@@ -4,8 +4,7 @@ import escapeHTML from 'escape-html'
 import ruleURI from 'eslint-rule-documentation'
 // eslint-disable-next-line import/no-extraneous-dependencies
 import { CompositeDisposable, Range } from 'atom'
-
-import { spawnWorker, showError } from './helpers'
+import { spawnWorker, showError, validatePoint } from './helpers'
 
 module.exports = {
   activate() {
@@ -119,7 +118,9 @@ module.exports = {
              */
             return null
           }
-          return response.map(({ message, line, severity, ruleId, column, fix }) => {
+          return response.map(({
+            message, line, severity, ruleId, column, fix, endLine, endColumn }
+          ) => {
             const textBuffer = textEditor.getBuffer()
             let linterFix = null
             if (fix) {
@@ -133,10 +134,16 @@ module.exports = {
               }
             }
             let range
+            const msgLine = line - 1
+            const msgCol = column ? column - 1 : column
             try {
-              range = Helpers.rangeFromLineNumber(
-                textEditor, line - 1, column ? column - 1 : column
-              )
+              if (endColumn && endLine) {
+                validatePoint(textEditor, msgLine, msgCol)
+                validatePoint(textEditor, endLine - 1, endColumn - 1)
+                range = [[msgLine, msgCol], [endLine - 1, endColumn - 1]]
+              } else {
+                range = Helpers.rangeFromLineNumber(textEditor, msgLine, msgCol)
+              }
             } catch (err) {
               throw new Error(
                 `Cannot mark location in editor for (${ruleId}) - (${message})` +