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kwin: emit window fullscreen info + refactor helper script

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The helper script was also refactored to minimize the amount of callbacks added and the memory used. There's no need to keep callbacks attached for non-active windows, which happened before.

Also it should be more efficient and simpler to send info over with just a single DBus call (also if more fields were to be added).

Both the script and the helper app will send/print info only if it changed since the previous one. Otherwise we'd keep spamming fullscreen false update when navigating the desktop and so on.
This commit is contained in:
p0358
2026-02-19 22:29:57 +01:00
committed by dec05eba
parent 636eca0d0e
commit 52afad5824
4 changed files with 87 additions and 57 deletions
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45
tools/gsr-kwin-helper/main.cpp
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@@ -8,8 +8,9 @@ static const char* INTROSPECTION_XML =
"\"http://www.freedesktop.org/standards/dbus/1.0/introspect.dtd\">\n"
"<node>\n"
" <interface name='com.dec05eba.gpu_screen_recorder'>\n"
" <method name='setActiveWindowTitle'>\n"
" <method name='updateActiveWindow'>\n"
" <arg type='s' name='title' direction='in'/>\n"
" <arg type='b' name='fullscreen' direction='in'/>\n"
" </method>\n"
" </interface>\n"
" <interface name='org.freedesktop.DBus.Introspectable'>\n"
@@ -23,6 +24,7 @@ static const char* INTROSPECTION_XML =
class GsrKwinHelper {
public:
std::string active_window_title;
bool active_window_fullscreen;
DBusConnection* connection = nullptr;
DBusError err;
@@ -83,8 +85,8 @@ public:
if (dbus_message_is_method_call(msg, "org.freedesktop.DBus.Introspectable", "Introspect")) {
handle_introspect(msg);
} else if (dbus_message_is_method_call(msg, "com.dec05eba.gpu_screen_recorder", "setActiveWindowTitle")) {
handle_set_title(msg);
} else if (dbus_message_is_method_call(msg, "com.dec05eba.gpu_screen_recorder", "updateActiveWindow")) {
handle_update_active_window(msg);
}
dbus_message_unref(msg);
@@ -108,9 +110,10 @@ public:
dbus_message_unref(reply);
}
void handle_set_title(DBusMessage* msg) {
void handle_update_active_window(DBusMessage* msg) {
DBusMessageIter args;
const char* title = nullptr;
DBusBasicValue title;
DBusBasicValue fullscreen;
if (!dbus_message_iter_init(msg, &args)) {
send_error_reply(msg, "No arguments provided");
@@ -123,15 +126,37 @@ public:
}
dbus_message_iter_get_basic(&args, &title);
if (!dbus_message_iter_next(&args)) {
send_error_reply(msg, "Not enough arguments provided");
return;
}
if (dbus_message_iter_get_arg_type(&args) != DBUS_TYPE_BOOLEAN) {
send_error_reply(msg, "Expected boolean argument");
return;
}
dbus_message_iter_get_basic(&args, &fullscreen);
if (title) {
active_window_title = title;
std::cout << "Active window title set to: " << active_window_title << "\n";
std::cout.flush();
send_success_reply(msg);
if (title.str) {
if (active_window_title != title.str) {
active_window_title = title.str;
std::cout << "Active window title set to: " << active_window_title << "\n";
std::cout.flush();
}
} else {
send_error_reply(msg, "Failed to read string");
return;
}
if (active_window_fullscreen != fullscreen.bool_val) {
active_window_fullscreen = fullscreen.bool_val;
std::cout << "Active window fullscreen state set to: " << active_window_fullscreen << "\n";
std::cout.flush();
}
send_success_reply(msg);
}
void send_success_reply(DBusMessage* msg) {