prr-ui: Automatically `PrrStart` on `PrrComment`

If the Prr session hasn't been started yet, do so automatically when
running `PrrComment`. This lets me comment directly on a line without
having to worry about starting the Prr review beforehand.

Now that I see the code and my earlier TODO, I think I could probably
have made it work without the `s:active` flag. Will have to try removing
it and testing whether that works.

1 files changed, 29 insertions, 0 deletions

diff --git a/bundle/prr-ui/autoload/prr_ui.vim b/bundle/prr-ui/autoload/prr_ui.vim
index 1d3246a..03d39f5 100644
--- a/bundle/prr-ui/autoload/prr_ui.vim
+++ b/bundle/prr-ui/autoload/prr_ui.vim
@@ -862,8 +862,37 @@ function! prr_ui#RandomEmoji()
 endfunction
 
 
+let s:prr_path = ''
+let s:active = 0
+
+function! prr_ui#Start()
+	let s:prr_path = system('prr-start --print')
+	let s:active = 1
+
+	return s:prr_path
+endfunction
+
+function! prr_ui#StartInteractive()
+	let prr_path = prr_ui#Start()
+	execute 'vsplit ' . prr_path
+endfunction
+
+function! prr_ui#Submit()
+	update
+
+	!prr-submit
+
+	let s:active = 0
+endfunction
+
+
 " Comment on the current line.
 function! prr_ui#Comment()
+	if !s:active
+		let prr_path = prr_ui#Start()
+		execute 'argadd ' . prr_path
+	endif
+
 	let current_line = getline('.')
 
 	try