fix: cursorWordPart commands cannot handle camel case word with number (microsoft#147074)

* Add strings.isAsciiDigit

* Update _moveWordPart to treat digits like lowercase ascii

Author: smallming

src/vs/base/common/strings.ts

@@ -378,6 +378,10 @@ export function compareSubstringIgnoreCase(a: string, b: string, aStart: number
 	return 0;
 }
 
+export function isAsciiDigit(code: number): boolean {
+	return code >= CharCode.Digit0 && code <= CharCode.Digit9;
+}
+
 export function isLowerAsciiLetter(code: number): boolean {
 	return code >= CharCode.a && code <= CharCode.z;
 }

src/vs/editor/common/cursor/cursorWordOperations.ts

@@ -246,7 +246,7 @@ export class WordOperations {
 				return new Position(lineNumber, column);
 			}
 
-			if (strings.isLowerAsciiLetter(left) && strings.isUpperAsciiLetter(right)) {
+			if ((strings.isLowerAsciiLetter(left) || strings.isAsciiDigit(left)) && strings.isUpperAsciiLetter(right)) {
 				// camelCaseVariables
 				return new Position(lineNumber, column);
 			}
@@ -255,7 +255,7 @@ export class WordOperations {
 				// thisIsACamelCaseWithOneLetterWords
 				if (column + 1 < maxColumn) {
 					const rightRight = lineContent.charCodeAt(column);
-					if (strings.isLowerAsciiLetter(rightRight)) {
+					if (strings.isLowerAsciiLetter(rightRight) || strings.isAsciiDigit(rightRight)) {
 						return new Position(lineNumber, column);
 					}
 				}
@@ -348,7 +348,7 @@ export class WordOperations {
 				return new Position(lineNumber, column);
 			}
 
-			if (strings.isLowerAsciiLetter(left) && strings.isUpperAsciiLetter(right)) {
+			if ((strings.isLowerAsciiLetter(left) || strings.isAsciiDigit(left)) && strings.isUpperAsciiLetter(right)) {
 				// camelCaseVariables
 				return new Position(lineNumber, column);
 			}
@@ -357,7 +357,7 @@ export class WordOperations {
 				// thisIsACamelCaseWithOneLetterWords
 				if (column + 1 < maxColumn) {
 					const rightRight = lineContent.charCodeAt(column);
-					if (strings.isLowerAsciiLetter(rightRight)) {
+					if (strings.isLowerAsciiLetter(rightRight) || strings.isAsciiDigit(rightRight)) {
 						return new Position(lineNumber, column);
 					}
 				}