add interfaces and option handling

src/common/input/UnicodeV11.ts

@@ -205,10 +205,10 @@ export class UnicodeV11 implements IUnicodeVersionProvider {
     }
   }
 
-  public wcwidth(num: number): number {
+  public wcwidth(num: number): 0 | 1 | 2 {
     if (num < 32) return 0;
     if (num < 127) return 1;
-    if (num < 65536) return UnicodeV11.bmpTable[num];
+    if (num < 65536) return UnicodeV11.bmpTable[num] as 0 | 1 | 2;
     if (UnicodeV11.bisearch(num, UnicodeV11.highCombining)) return 0;
     if (UnicodeV11.bisearch(num, UnicodeV11.highWide)) return 2;
     return 1;

src/common/input/UnicodeV6.ts

@@ -118,10 +118,10 @@ export class UnicodeV6 implements IUnicodeVersionProvider {
     }
   }
 
-  public wcwidth(num: number): number {
+  public wcwidth(num: number): 0 | 1 | 2 {
     if (num < 32) return 0;
     if (num < 127) return 1;
-    if (num < 65536) return UnicodeV6.bmpTable[num];
+    if (num < 65536) return UnicodeV6.bmpTable[num] as 0 | 1 | 2;
     if (UnicodeV6.bisearch(num, UnicodeV6.highCombining)) return 0;
     if ((num >= 0x20000 && num <= 0x2fffd) || (num >= 0x30000 && num <= 0x3fffd)) return 2;
     return 1;

src/common/services/Services.ts

@@ -289,7 +289,7 @@ export interface IUnicodeService {
   /** Registered Unicode versions. */
   readonly versions: string[];
   /** Currently active version. */
-  readonly activeVersion: string;
+  activeVersion: string;
   /** Event triggered, when activate version changed. */
   readonly onChange: IEvent<string>;
 
@@ -302,5 +302,5 @@ export interface IUnicodeService {
 
 export interface IUnicodeVersionProvider {
   version: string;
-  wcwidth(ucs: number): number;
+  wcwidth(ucs: number): 0 | 1 | 2;
 }

src/common/services/UnicodeService.test.ts

@@ -9,8 +9,8 @@ import { IUnicodeVersionProvider } from 'common/services/Services';
 
 class DummyProvider implements IUnicodeVersionProvider {
   version = '123';
-  wcwidth(n: number): number {
-    return 123;
+  wcwidth(n: number): 0 | 1 | 2 {
+    return 2;
   }
 }
 
@@ -41,7 +41,7 @@ describe('unicode provider', () => {
     const dummyProvider = new DummyProvider();
     us.register(dummyProvider);
     us.activeVersion = dummyProvider.version;
-    assert.equal(us.getStringCellWidth('hello'), 123 * 5);
+    assert.equal(us.getStringCellWidth('hello'), 2 * 5);
   });
   it('wcwidth V6 emoji test', () => {
     const widthV6 = us.getStringCellWidth('🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣');