Devtools Profiler: allow user to enter commit number (#19957)

Co-authored-by: Brian Vaughn <bvaughn@fb.com>

packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotSelector.css

@@ -28,3 +28,19 @@
   justify-content: center;
   color: var(--color-dim);
 }
+
+.Input {
+  background: none;
+  font-size: var(--font-size-sans-normal);
+  text-align: right;
+  font-family: var(--font-family-monospace);
+  border: 1px solid transparent;
+  border-radius: 0.125rem;
+  padding: 0.125rem;
+  color: var(--color-attribute-editable-value);
+}
+
+.Input:focus {
+  background-color: var(--color-button-background-focus);
+  outline: none;
+}

packages/react-devtools-shared/src/devtools/views/Profiler/SnapshotSelector.js

@@ -8,7 +8,7 @@
  */
 
 import * as React from 'react';
-import {Fragment, useCallback, useContext, useMemo} from 'react';
+import {Fragment, useContext, useMemo} from 'react';
 import Button from '../Button';
 import ButtonIcon from '../ButtonIcon';
 import {ProfilerContext} from './ProfilerContext';
@@ -86,47 +86,89 @@ export default function SnapshotSelector(_: Props) {
 
   let label = null;
   if (numFilteredCommits > 0) {
-    label =
-      `${selectedFilteredCommitIndex + 1}`.padStart(
-        `${numFilteredCommits}`.length,
-        '0',
-      ) +
-      ' / ' +
-      numFilteredCommits;
-  }
+    const handleCommitInputChange = event => {
+      const value = parseInt(event.currentTarget.value, 10);
+      if (!isNaN(value)) {
+        const filteredIndex = Math.min(
+          Math.max(value - 1, 0),
 
-  const viewNextCommit = useCallback(() => {
-    let nextCommitIndex = ((selectedFilteredCommitIndex: any): number) + 1;
-    if (nextCommitIndex === filteredCommitIndices.length) {
-      nextCommitIndex = 0;
-    }
-    selectCommitIndex(filteredCommitIndices[nextCommitIndex]);
-  }, [selectedFilteredCommitIndex, filteredCommitIndices, selectCommitIndex]);
-  const viewPrevCommit = useCallback(() => {
-    let nextCommitIndex = ((selectedFilteredCommitIndex: any): number) - 1;
-    if (nextCommitIndex < 0) {
-      nextCommitIndex = filteredCommitIndices.length - 1;
-    }
-    selectCommitIndex(filteredCommitIndices[nextCommitIndex]);
-  }, [selectedFilteredCommitIndex, filteredCommitIndices, selectCommitIndex]);
+          // Snashots are shown to the user as 1-based
+          // but the indices within the profiler data array ar 0-based.
+          numFilteredCommits - 1,
+        );
+        selectCommitIndex(filteredCommitIndices[filteredIndex]);
+      }
+    };
 
-  const handleKeyDown = useCallback(
-    event => {
+    const handleClick = event => {
+      event.currentTarget.select();
+    };
+
+    const handleKeyDown = event => {
       switch (event.key) {
-        case 'ArrowLeft':
+        case 'ArrowDown':
           viewPrevCommit();
           event.stopPropagation();
           break;
-        case 'ArrowRight':
+        case 'ArrowUp':
           viewNextCommit();
           event.stopPropagation();
           break;
         default:
           break;
       }
-    },
-    [viewNextCommit, viewPrevCommit],
-  );
+    };
+
+    const input = (
+      <input
+        className={styles.Input}
+        type="text"
+        inputMode="numeric"
+        pattern="[0-9]*"
+        value={selectedFilteredCommitIndex + 1}
+        size={`${numFilteredCommits}`.length}
+        onChange={handleCommitInputChange}
+        onClick={handleClick}
+        onKeyDown={handleKeyDown}
+      />
+    );
+
+    label = (
+      <Fragment>
+        {input} / {numFilteredCommits}
+      </Fragment>
+    );
+  }
+
+  const viewNextCommit = () => {
+    let nextCommitIndex = ((selectedFilteredCommitIndex: any): number) + 1;
+    if (nextCommitIndex === filteredCommitIndices.length) {
+      nextCommitIndex = 0;
+    }
+    selectCommitIndex(filteredCommitIndices[nextCommitIndex]);
+  };
+  const viewPrevCommit = () => {
+    let nextCommitIndex = ((selectedFilteredCommitIndex: any): number) - 1;
+    if (nextCommitIndex < 0) {
+      nextCommitIndex = filteredCommitIndices.length - 1;
+    }
+    selectCommitIndex(filteredCommitIndices[nextCommitIndex]);
+  };
+
+  const handleKeyDown = event => {
+    switch (event.key) {
+      case 'ArrowLeft':
+        viewPrevCommit();
+        event.stopPropagation();
+        break;
+      case 'ArrowRight':
+        viewNextCommit();
+        event.stopPropagation();
+        break;
+      default:
+        break;
+    }
+  };
 
   if (commitData.length === 0) {
     return null;