Improve rename: it becomes more precise

Author: camilesing

README.md

@@ -18,7 +18,7 @@ example:
 - ![](images/expect-semicolon.jpg)
 
 ### 1.2 Rename
-![](images/rename.gif)
+![](images/rename_v2.gif)
 
 ### 1.3 Code Completion Proposals
 ![](images/code-completion-proposal.gif)

images/rename.gif

@@ -39,7 +39,7 @@
               "flink-sql-grammar-check.enable": {
                 "type": "boolean",
                 "default": false,
-                "description": "Enable flink sql grammar check. the feature during experiment."
+                "description": "Enable flink sql grammar check."
               }
             }
         },

images/rename_v2.gif

@@ -134,7 +134,13 @@ class FqlRenameProvider implements vscode.RenameProvider {
             const line = document.lineAt(i);
             const start = line.text.indexOf(originalWord);
             if (start >= 0) {
-                edit.replace(document.uri, new vscode.Range(new vscode.Position(i, start), new vscode.Position(i, start + originalWord.length)), newName);
+                // 检查单词前后是否有其他字符
+                const isWordBoundary = (index: number) => {
+                    return index < 0 || index >= line.text.length || /\W/.test(line.text[index]);
+                };
+                if (isWordBoundary(start - 1) && isWordBoundary(start + originalWord.length)) {
+                    edit.replace(document.uri, new vscode.Range(new vscode.Position(i, start), new vscode.Position(i, start + originalWord.length)), newName);
+                }
             }
         }