added "enabled" field to SourceControlInputBox for vscode api.

packages/plugin-ext/src/common/plugin-api-rpc.ts

@@ -919,6 +919,7 @@ export interface ScmMain {
     $setInputBoxValue(sourceControlHandle: number, value: string): void;
     $setInputBoxPlaceholder(sourceControlHandle: number, placeholder: string): void;
     $setInputBoxVisible(sourceControlHandle: number, visible: boolean): void;
+    $setInputBoxEnabled(sourceControlHandle: number, enabled: boolean): void;
 }
 
 export interface SourceControlProviderFeatures {

packages/plugin-ext/src/main/browser/scm-main.ts

@@ -440,4 +440,14 @@ export class ScmMainImpl implements ScmMain {
 
         repository.input.visible = visible;
     }
+
+    $setInputBoxEnabled(sourceControlHandle: number, enabled: boolean): void {
+        const repository = this.repositories.get(sourceControlHandle);
+
+        if (!repository) {
+            return;
+        }
+
+        repository.input.enabled = enabled;
+    }
 }

packages/plugin-ext/src/plugin/scm.ts

@@ -322,6 +322,17 @@ export class ScmInputBoxImpl implements theia.SourceControlInputBox {
         this._visible = visible;
     }
 
+    private _enabled: boolean;
+
+    get enabled(): boolean {
+        return this._enabled;
+    }
+
+    set enabled(enabled: boolean) {
+        this.proxy.$setInputBoxEnabled(this.sourceControlHandle, enabled);
+        this._enabled = enabled;
+    }
+
     private _validateInput: ValidateInput | undefined;
 
     get validateInput(): ValidateInput | undefined {

packages/plugin/src/theia.d.ts

@@ -10802,6 +10802,11 @@ export module '@theia/plugin' {
          * Controls whether the input box is visible (default is true).
          */
         visible: boolean;
+
+        /**
+         * Controls whether the input box is enabled (default is `true`).
+         */
+        enabled: boolean;
     }
 
     interface QuickDiffProvider {

packages/scm/src/browser/scm-commit-widget.tsx

@@ -138,6 +138,7 @@ export class ScmCommitWidget extends ReactWidget implements StatefulWidget {
                 spellCheck={false}
                 autoFocus={true}
                 value={input.value}
+                disabled={!input.enabled}
                 onChange={this.setInputValue}
                 ref={this.inputRef}
                 rows={1}

packages/scm/src/browser/scm-input.ts

@@ -36,14 +36,15 @@ export interface ScmInputValidator {
 }
 
 export interface ScmInputOptions {
-    placeholder?: string
-    validator?: ScmInputValidator
-    visible?: boolean
+    placeholder?: string;
+    validator?: ScmInputValidator;
+    visible?: boolean;
+    enabled?: boolean;
 }
 
 export interface ScmInputData {
-    value?: string
-    issue?: ScmInputIssue
+    value?: string;
+    issue?: ScmInputIssue;
 }
 
 export class ScmInput implements Disposable {
@@ -108,6 +109,19 @@ export class ScmInput implements Disposable {
         this.validate();
     }
 
+    protected _enabled = this.options.enabled ?? true;
+    get enabled(): boolean {
+        return this._enabled;
+    }
+    set enabled(enabled: boolean) {
+        if (this._enabled === enabled) {
+            return;
+        }
+        this._enabled = enabled;
+        this.fireDidChange();
+        this.validate();
+    }
+
     protected _issue: ScmInputIssue | undefined;
     get issue(): ScmInputIssue | undefined {
         return this._issue;