Support case matching for code completion (#2834)

Signed-off-by: sheche <[email protected]>

Author: jdneo

package.json

@@ -573,6 +573,22 @@
           "markdownDescription": "Enable/disable postfix completion support. `#editor.snippetSuggestions#` can be used to customize how postfix snippets are sorted.",
           "scope": "window"
         },
+        "java.completion.matchCase": {
+          "type": "string",
+          "enum": [
+            "auto",
+            "firstLetter",
+            "off"
+          ],
+          "enumDescriptions": [
+            "Only match case for the first letter when using Visual Studio Code - Insiders.",
+            "Match case for the first letter when doing completion.",
+            "Do not match case when doing completion."
+          ],
+          "default": "auto",
+          "markdownDescription": "Specify whether to match case for code completion.",
+          "scope": "window"
+        },
         "java.foldingRange.enabled": {
           "type": "boolean",
           "default": true,

src/utils.ts

@@ -188,10 +188,11 @@ export function getJavaConfig(javaHome: string) {
 	const editorConfig = workspace.getConfiguration('editor');
 	javaConfig.format.insertSpaces = editorConfig.get('insertSpaces');
 	javaConfig.format.tabSize = editorConfig.get('tabSize');
+	const isInsider: boolean = version.includes("insider");
 	const androidSupport = javaConfig.jdt.ls.androidSupport.enabled;
 	switch (androidSupport) {
 		case "auto":
-			javaConfig.jdt.ls.androidSupport.enabled = version.includes("insider") ? true : false;
+			javaConfig.jdt.ls.androidSupport.enabled = isInsider;
 			break;
 		case "on":
 			javaConfig.jdt.ls.androidSupport.enabled = true;
@@ -203,5 +204,10 @@ export function getJavaConfig(javaHome: string) {
 			javaConfig.jdt.ls.androidSupport.enabled = false;
 			break;
 	}
+
+	const completionCaseMatching = javaConfig.completion.matchCase;
+	if (completionCaseMatching === "auto") {
+		javaConfig.completion.matchCase = isInsider ? "firstLetter" : "off";
+	}
 	return javaConfig;
 }