Introduce pid criteria token

This can be used as a workaround to flag terminal windows as urgent when
commands are completed, until urgency is introduced in the Wayland
protocol.

Configure your shell to run `swaymsg "[pid=$PPID] urgent enable"` when
commands are completed, and use a terminal which uses one process per
window.

1 files changed, 17 insertions, 1 deletions

diff --git a/sway/criteria.c b/sway/criteria.c
index 2c8e1644..02b04fc8 100644
--- a/sway/criteria.c
+++ b/sway/criteria.c
@@ -31,7 +31,8 @@ bool criteria_is_empty(struct criteria *criteria) {
                 && !criteria->floating
                 && !criteria->tiling
                 && !criteria->urgent
-                && !criteria->workspace;
+                && !criteria->workspace
+                && !criteria->pid;
 }
 
 // The error pointer is used for parsing functions, and saves having to pass it
@@ -370,6 +371,12 @@ static bool criteria_matches_view(struct criteria *criteria,
                 }
         }
 
+        if (criteria->pid) {
+                if (criteria->pid != view->pid) {
+                        return false;
+                }
+        }
+
         return true;
 }
 
@@ -458,6 +465,7 @@ enum criteria_token {
         T_TITLE,
         T_URGENT,
         T_WORKSPACE,
+        T_PID,
 
         T_INVALID,
 };
@@ -493,6 +501,8 @@ static enum criteria_token token_from_name(char *name) {
                 return T_TILING;
         } else if (strcmp(name, "floating") == 0) {
                 return T_FLOATING;
+        } else if (strcmp(name, "pid") == 0) {
+                return T_PID;
         }
         return T_INVALID;
 }
@@ -587,6 +597,12 @@ static bool parse_token(struct criteria *criteria, char *name, char *value) {
         case T_WORKSPACE:
                 pattern_create(&criteria->workspace, value);
                 break;
+        case T_PID:
+                criteria->pid = strtoul(value, &endptr, 10);
+                if (*endptr != 0) {
+                        error = strdup("The value for 'pid' should be numeric");
+                }
+                break;
         case T_INVALID:
                 break;
         }