initial code required for #47

2 files changed, 68 insertions, 2 deletions

diff --git a/src/carbon.c b/src/carbon.c
new file mode 100644
index 0000000..98e2793
--- /dev/null
+++ b/src/carbon.c
@@ -0,0 +1,56 @@
+#include <Carbon/Carbon.h>
+
+struct carbon_event
+{
+    EventTargetRef target;
+    EventHandlerUPP handler;
+    EventTypeSpec type;
+    EventHandlerRef handler_ref;
+    char * volatile process_name;
+};
+
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Wdeprecated"
+static OSStatus
+carbon_event_handler(EventHandlerCallRef ref, EventRef event, void *context)
+{
+    struct carbon_event *carbon = (struct carbon_event *) context;
+
+    ProcessSerialNumber psn;
+    if (GetEventParameter(event,
+                          kEventParamProcessID,
+                          typeProcessSerialNumber,
+                          NULL,
+                          sizeof(psn),
+                          NULL,
+                          &psn) != noErr) {
+        return -1;
+    }
+
+    CFStringRef process_name_ref;
+    if (CopyProcessName(&psn, &process_name_ref) == noErr) {
+        if (carbon->process_name) free(carbon->process_name);
+        carbon->process_name = copy_cfstring(process_name_ref);
+        printf("front app changed: %s\n", carbon->process_name);
+        CFRelease(process_name_ref);
+    }
+
+    return noErr;
+}
+#pragma clang diagnostic pop
+
+bool carbon_event_init(struct carbon_event *carbon)
+{
+    carbon->target = GetApplicationEventTarget();
+    carbon->handler = NewEventHandlerUPP(carbon_event_handler);
+    carbon->type.eventClass = kEventClassApplication;
+    carbon->type.eventKind = kEventAppFrontSwitched;
+    carbon->process_name = NULL;
+
+    return InstallEventHandler(carbon->target,
+                               carbon->handler,
+                               1,
+                               &carbon->type,
+                               carbon,
+                               &carbon->handler_ref) == noErr;
+}
diff --git a/src/skhd.c b/src/skhd.c
index b33b6c7..1391125 100644
--- a/src/skhd.c
+++ b/src/skhd.c
@@ -27,6 +27,7 @@
 #include "parse.c"
 #include "hotkey.c"
 #include "synthesize.c"
+// #include "carbon.c"
 
 #define internal static
 extern bool CGSIsSecureEventInputSet();
@@ -62,6 +63,9 @@ internal unsigned major_version = 0;
 internal unsigned minor_version = 2;
 internal unsigned patch_version = 5;
 
+// internal struct carbon_event carbon;
+internal struct event_tap event_tap;
+internal struct hotloader hotloader;
 internal struct mode *current_mode;
 internal struct table mode_map;
 internal char *config_file;
@@ -219,6 +223,14 @@ int main(int argc, char **argv)
         error("skhd: could not initialize keycode map! abort..\n");
     }
 
+    /*
+     * NOTE(koekeishiya: hooks up event for tracking name of focused process/application
+     *
+     *  if (!carbon_event_init(&carbon)) {
+     *      error("skhd: could not initialize carbon events! abort..\n");
+     *  }
+     */
+
     if (!config_file) {
         use_default_config_path();
     }
@@ -234,13 +246,11 @@ int main(int argc, char **argv)
     END_SCOPED_TIMED_BLOCK();
 
     BEGIN_SCOPED_TIMED_BLOCK("begin_eventtap");
-    struct event_tap event_tap;
     event_tap.mask = (1 << kCGEventKeyDown) | (1 << NX_SYSDEFINED);
     event_tap_begin(&event_tap, key_handler);
     END_SCOPED_TIMED_BLOCK();
 
     BEGIN_SCOPED_TIMED_BLOCK("begin_hotloader");
-    struct hotloader hotloader = {};
     if (hotloader_add_file(&hotloader, config_file) &&
         hotloader_begin(&hotloader, config_handler)) {
         debug("skhd: watching '%s' for changes\n", config_file);