Add suspended job indicator (#616)

Co-authored-by: Sindre Sorhus <[email protected]>

pure.zsh

@@ -131,6 +131,11 @@ prompt_pure_preprompt_render() {
 	# Initialize the preprompt array.
 	local -a preprompt_parts
 
+	# Suspended jobs in background.
+	if ((${(M)#jobstates:#suspended:*} != 0)); then
+		preprompt_parts+='%F{$prompt_pure_colors[suspended_jobs]}✦'
+	fi
+
 	# Username and machine, if applicable.
 	[[ -n $prompt_pure_state[username] ]] && preprompt_parts+=($prompt_pure_state[username])
 
@@ -814,6 +819,7 @@ prompt_pure_setup() {
 		prompt:error         red
 		prompt:success       magenta
 		prompt:continuation  242
+		suspended_jobs       red
 		user                 242
 		user:root            default
 		virtualenv           242

readme.md

@@ -156,6 +156,7 @@ Colors can be changed by using [`zstyle`](http://zsh.sourceforge.net/Doc/Release
 - `prompt:error` (red) - The `PURE_PROMPT_SYMBOL` when the previous command has *failed*.
 - `prompt:success` (magenta) - The `PURE_PROMPT_SYMBOL` when the previous command has *succeeded*.
 - `prompt:continuation` (242) - The color for showing the state of the parser in the continuation prompt (PS2). It's the pink part in [this screenshot](https://user-images.githubusercontent.com/147409/70068574-ebc74800-15f8-11ea-84c0-8b94a4b57ff4.png), it appears in the same spot as `virtualenv`. You could for example matching both colors so that Pure has a uniform look.
+- `suspended_jobs` (red) - The `✦` symbol indicates that jobs are running in the background.
 - `user` (242) - The username when on remote machine.
 - `user:root` (default) - The username when the user is root.
 - `virtualenv` (242) - The name of the Python `virtualenv` when in use.