Open Radar

 
Summary:
In previous versions of Xcode, when the user re-indented a line with the tab key, the cursor would move to the first non-whitespace character on the line. If no there were no non-whitespace characters, the cursor would move to the point where indented text would start. Xcode 9 does not do this. 

For example, suppose the Tab key setting in Preferences:Text Editing:Indentation is set to “Indents always”, and the cursor is in the first column of line 2 below. 

1: func doSomething() {
2:     let lineInQuestion = "This one"
3:     print(lineInQuestion)
4: }

Pressing tab in Xcode 8 (and many, many versions prior) would move the cursor to column 5 (the l in let). In Xcode 9, nothing happens. Worse still, there doesn’t appear to be a single-key shortcut that can move to the indentation point. The best one I can find is cmd-right arrow, cmd-left arrow, which is far less convenient than just hitting the tab key.

Steps to Reproduce:
1. In Xcode’s preferences, navigate to  Text Editing:Indentation and set the Tab key popup to “Indents always.”
2. Open an Xcode 9 editing window containing Swift.
3. Paste the following code:

func doSomething() {
    let lineInQuestion = "This one"
    print(lineInQuestion)
}

4. Place the cursor anywhere in the leading whitespace of the line that starts with “let lineInQuestion.”
5. Press the tab key.

Expected Results:
Xcode will move the cursor to the first column containing a non-whitespace character, or if there are no whitespace characters, the first column where a non-whitespace character would occur if Xcode’s indentation rules were followed.

Observed Results:
Nothing happens.

Version:
Xcode 9.0 beta 3 (9M174d)
macOS Sierra 10.12.6 (16G29)

Notes:
Again, the Xcode 9 behavior is different than any Xcode version I can remember.

Configuration: