Add mac app agent and Terminal.app specific keybinds

keymaps/custom/app_focus.c

@@ -0,0 +1,51 @@
+#include "raw_hid.h"
+#include <string.h>
+
+#include "app_focus.h"
+
+#define CMD_SET_FOCUSED_APP 0x80
+#define APP_NAME_BUF_SIZE 64
+
+focused_app_t focused_app = APP_UNKNOWN;
+
+static char app_name_buf[APP_NAME_BUF_SIZE];
+
+typedef struct {
+    const char *name;
+    focused_app_t app;
+} app_mapping_t;
+
+static const app_mapping_t app_map[] = {
+    { "Terminal",           APP_TERMINAL },
+    { "iTerm2",             APP_TERMINAL },
+    { "Xcode",              APP_XCODE },
+    { "Code",               APP_VSCODE },  // "Code" is VSCode's localizedName
+    { "Visual Studio Code", APP_VSCODE },
+};
+
+static focused_app_t resolve_app(const char *name) {
+    for (uint8_t i = 0; i < sizeof(app_map) / sizeof(app_map[0]); i++) {
+        if (strcmp(name, app_map[i].name) == 0) {
+            return app_map[i].app;
+        }
+    }
+    return APP_UNKNOWN;
+}
+
+// Called from system76_ec.c's raw_hid_receive (injected via sed at build time).
+// Returns true if the command was handled.
+bool app_focus_raw_hid_intercept(uint8_t *data, uint8_t length) {
+    if (data[0] == CMD_SET_FOCUSED_APP) {
+        uint8_t copy_len = length - 1;
+        if (copy_len >= APP_NAME_BUF_SIZE) {
+            copy_len = APP_NAME_BUF_SIZE - 1;
+        }
+        memcpy(app_name_buf, &data[1], copy_len);
+        app_name_buf[copy_len] = '\0';
+        focused_app = resolve_app(app_name_buf);
+        data[1] = 0; // success
+        raw_hid_send(data, length);
+        return true;
+    }
+    return false;
+}