Fix parsing of timeline's timestamp input

Test: npm run build:all && npm run test:all
Fix: b/264504813
Change-Id: I522d5d9f47a684e013d405ed6b6395820354ef3c

tools/winscope/src/app/components/timeline/timeline_component.ts

@@ -30,6 +30,7 @@ import {FormControl, FormGroup, Validators} from '@angular/forms';
 import {DomSanitizer, SafeUrl} from '@angular/platform-browser';
 import {TimelineData} from 'app/timeline_data';
 import {TRACE_INFO} from 'app/trace_info';
+import {StringUtils} from 'common/string_utils';
 import {TimeUtils} from 'common/time_utils';
 import {TimestampChangeListener} from 'interfaces/timestamp_change_listener';
 import {ElapsedTimestamp, RealTimestamp, Timestamp, TimestampType} from 'trace/timestamp';
@@ -526,7 +527,10 @@ export class TimelineComponent implements TimestampChangeListener {
     }
     const target = event.target as HTMLInputElement;
 
-    const timestamp = new Timestamp(this.timelineData.getTimestampType()!, BigInt(target.value));
+    const timestamp = new Timestamp(
+      this.timelineData.getTimestampType()!,
+      StringUtils.parseBigIntStrippingUnit(target.value)
+    );
     this.timelineData.setCurrentTimestamp(timestamp);
     this.updateTimeInputValuesToCurrentTimestamp();
   }

tools/winscope/src/common/string_utils.ts

@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+class StringUtils {
+  static parseBigIntStrippingUnit(s: string): bigint {
+    const match = s.match(/^\s*(-?\d+)\D*.*$/);
+    if (!match) {
+      throw new Error(`Cannot parse '${s}' as bigint`);
+    }
+    return BigInt(match[1]);
+  }
+}
+
+export {StringUtils};

tools/winscope/src/common/string_utils_test.ts

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {StringUtils} from './string_utils';
+
+describe('StringUtils', () => {
+  it('parses bigint', () => {
+    expect(StringUtils.parseBigIntStrippingUnit('-10')).toEqual(-10n);
+    expect(StringUtils.parseBigIntStrippingUnit('-10 unit')).toEqual(-10n);
+    expect(StringUtils.parseBigIntStrippingUnit('-10unit')).toEqual(-10n);
+    expect(StringUtils.parseBigIntStrippingUnit(' -10 unit ')).toEqual(-10n);
+
+    expect(StringUtils.parseBigIntStrippingUnit('0')).toEqual(0n);
+    expect(StringUtils.parseBigIntStrippingUnit('0 unit')).toEqual(0n);
+    expect(StringUtils.parseBigIntStrippingUnit('0unit')).toEqual(0n);
+    expect(StringUtils.parseBigIntStrippingUnit(' 0 unit ')).toEqual(0n);
+
+    expect(StringUtils.parseBigIntStrippingUnit('10')).toEqual(10n);
+    expect(StringUtils.parseBigIntStrippingUnit('10 unit')).toEqual(10n);
+    expect(StringUtils.parseBigIntStrippingUnit('10unit')).toEqual(10n);
+    expect(StringUtils.parseBigIntStrippingUnit(' 10 unit ')).toEqual(10n);
+
+    expect(() => StringUtils.parseBigIntStrippingUnit('invalid')).toThrow();
+    expect(() => StringUtils.parseBigIntStrippingUnit('invalid 10 unit')).toThrow();
+  });
+});