tweak terminal suggest sorting for files/folders (#239145)

src/vs/workbench/contrib/terminalContrib/suggest/test/browser/terminalSuggestAddon.integrationTest.ts

@@ -35,7 +35,6 @@ import { events as windows11_pwsh_filename_same_case_change_forward_slash } from
 import { events as windows11_pwsh_getcontent_delete_ghost } from './recordings/windows11_pwsh_getcontent_delete_ghost.js';
 import { events as windows11_pwsh_input_ls_complete_ls } from './recordings/windows11_pwsh_input_ls_complete_ls.js';
 import { events as windows11_pwsh_namespace_same_prefix } from './recordings/windows11_pwsh_namespace_same_prefix.js';
-import { events as windows11_pwsh_single_char } from './recordings/windows11_pwsh_single_char.js';
 import { events as windows11_pwsh_type_before_prompt } from './recordings/windows11_pwsh_type_before_prompt.js';
 import { events as windows11_pwsh_writehost_multiline } from './recordings/windows11_pwsh_writehost_multiline.js';
 import { events as windows11_pwsh_writehost_multiline_nav_up } from './recordings/windows11_pwsh_writehost_multiline_nav_up.js';
@@ -60,7 +59,6 @@ const recordedTestCases: { name: string; events: RecordedSessionEvent[] }[] = [
 	{ name: 'windows11_pwsh_getcontent_delete_ghost', events: windows11_pwsh_getcontent_delete_ghost as any as RecordedSessionEvent[] },
 	{ name: 'windows11_pwsh_input_ls_complete_ls', events: windows11_pwsh_input_ls_complete_ls as any as RecordedSessionEvent[] },
 	{ name: 'windows11_pwsh_namespace_same_prefix', events: windows11_pwsh_namespace_same_prefix as any as RecordedSessionEvent[] },
-	{ name: 'windows11_pwsh_single_char', events: windows11_pwsh_single_char as any as RecordedSessionEvent[] },
 	{ name: 'windows11_pwsh_type_before_prompt', events: windows11_pwsh_type_before_prompt as any as RecordedSessionEvent[] },
 	{ name: 'windows11_pwsh_writehost_multiline_nav_up', events: windows11_pwsh_writehost_multiline_nav_up as any as RecordedSessionEvent[] },
 	{ name: 'windows11_pwsh_writehost_multiline', events: windows11_pwsh_writehost_multiline as any as RecordedSessionEvent[] },

src/vs/workbench/services/suggest/browser/simpleCompletionItem.ts

@@ -57,9 +57,25 @@ export interface ISimpleCompletion {
 }
 
 export class SimpleCompletionItem {
-	// perf
+	/**
+	 * The lowercase label, normalized to `\` path separators on Windows.
+	 */
 	readonly labelLow: string;
+
+	/**
+	 * {@link labelLow} without the file extension.
+	 */
 	readonly labelLowExcludeFileExt: string;
+
+	/**
+	 * The lowercase label, when the completion is a file or directory this has  normalized path
+	 * separators (/) on Windows and no trailing separator for directories.
+	 */
+	readonly labelLowNormalizedPath: string;
+
+	/**
+	 * The file extension part from {@link labelLow}.
+	 */
 	readonly fileExtLow: string = '';
 
 	// sorting, filtering
@@ -73,6 +89,8 @@ export class SimpleCompletionItem {
 		// ensure lower-variants (perf)
 		this.labelLow = this.completion.label.toLowerCase();
 		this.labelLowExcludeFileExt = this.labelLow;
+		this.labelLowNormalizedPath = this.labelLow;
+
 		if (completion.isFile) {
 			if (isWindows) {
 				this.labelLow = this.labelLow.replaceAll('/', '\\');
@@ -83,5 +101,14 @@ export class SimpleCompletionItem {
 				this.fileExtLow = this.labelLow.substring(extIndex + 1);
 			}
 		}
+
+		if (completion.isFile || completion.isDirectory) {
+			if (isWindows) {
+				this.labelLowNormalizedPath = this.labelLow.replaceAll('\\', '/');
+			}
+			if (completion.isDirectory) {
+				this.labelLowNormalizedPath = this.labelLowNormalizedPath.replace(/\/$/, '');
+			}
+		}
 	}
 }

src/vs/workbench/services/suggest/browser/simpleCompletionModel.ts

@@ -8,6 +8,7 @@ import { quickSelect } from '../../../../base/common/arrays.js';
 import { CharCode } from '../../../../base/common/charCode.js';
 import { FuzzyScore, fuzzyScore, fuzzyScoreGracefulAggressive, FuzzyScoreOptions, FuzzyScorer } from '../../../../base/common/filters.js';
 import { isWindows } from '../../../../base/common/platform.js';
+import { count } from '../../../../base/common/strings.js';
 
 export interface ISimpleCompletionStats {
 	pLabelLen: number;
@@ -207,12 +208,28 @@ export class SimpleCompletionModel {
 				}
 				// Then by file extension length ascending
 				score = a.fileExtLow.length - b.fileExtLow.length;
+				if (score !== 0) {
+					return score;
+				}
 			}
-			if (score === 0 || fileExtScore(a.fileExtLow) === 0 && fileExtScore(b.fileExtLow) === 0) {
-				// both files or directories, sort alphabetically
-				score = a.completion.label.localeCompare(b.completion.label);
+			if (a.labelLowNormalizedPath && b.labelLowNormalizedPath) {
+				// Directories
+				// Count depth of path (number of / or \ occurrences)
+				score = count(a.labelLowNormalizedPath, '/') - count(b.labelLowNormalizedPath, '/');
+				if (score !== 0) {
+					return score;
+				}
+
+				// Ensure shorter prefixes appear first
+				if (b.labelLowNormalizedPath.startsWith(a.labelLowNormalizedPath)) {
+					return -1; // `a` is a prefix of `b`, so `a` should come first
+				}
+				if (a.labelLowNormalizedPath.startsWith(b.labelLowNormalizedPath)) {
+					return 1; // `b` is a prefix of `a`, so `b` should come first
+				}
 			}
-			return score;
+			// Sort alphabetically
+			return a.labelLow.localeCompare(b.labelLow);
 		});
 		this._refilterKind = Refilter.Nothing;