neko/pkg/xevent/xevent.c
Miroslav Šedivý c70c8217de add unminimize.
2023-04-24 22:19:48 +02:00

190 lines
6.8 KiB
C

#include "xevent.h"
static int XEventError(Display *display, XErrorEvent *event) {
char message[100];
int error;
error = XGetErrorText(display, event->error_code, message, sizeof(message));
if (error) {
goXEventError(event, "Could not get error message.");
} else {
goXEventError(event, message);
}
return 1;
}
void XEventLoop(char *name) {
Display *display = XOpenDisplay(name);
Window root = DefaultRootWindow(display);
int xfixes_event_base, xfixes_error_base;
if (!XFixesQueryExtension(display, &xfixes_event_base, &xfixes_error_base)) {
return;
}
// save last size id for fullscreen bug fix
SizeID last_size_id;
Atom WM_WINDOW_ROLE = XInternAtom(display, "WM_WINDOW_ROLE", 1);
Atom XA_CLIPBOARD = XInternAtom(display, "CLIPBOARD", 0);
XFixesSelectSelectionInput(display, root, XA_CLIPBOARD, XFixesSetSelectionOwnerNotifyMask);
XFixesSelectCursorInput(display, root, XFixesDisplayCursorNotifyMask);
XSelectInput(display, root, SubstructureNotifyMask);
XSync(display, 0);
XSetErrorHandler(XEventError);
while (goXEventActive()) {
XEvent event;
XNextEvent(display, &event);
// XFixesDisplayCursorNotify
if (event.type == xfixes_event_base + 1) {
XFixesCursorNotifyEvent notifyEvent = *((XFixesCursorNotifyEvent *) &event);
if (notifyEvent.subtype == XFixesDisplayCursorNotify) {
goXEventCursorChanged(notifyEvent);
continue;
}
}
// XFixesSelectionNotifyEvent
if (event.type == xfixes_event_base + XFixesSelectionNotify) {
XFixesSelectionNotifyEvent notifyEvent = *((XFixesSelectionNotifyEvent *) &event);
if (notifyEvent.subtype == XFixesSetSelectionOwnerNotify && notifyEvent.selection == XA_CLIPBOARD) {
goXEventClipboardUpdated();
continue;
}
}
// ConfigureNotify
if (event.type == ConfigureNotify) {
Window window = event.xconfigure.window;
char *name;
XFetchName(display, window, &name);
XTextProperty role;
XGetTextProperty(display, window, &role, WM_WINDOW_ROLE);
goXEventConfigureNotify(display, window, name, role.value);
XFree(name);
continue;
}
// UnmapNotify
if (event.type == UnmapNotify) {
Window window = event.xunmap.window;
goXEventUnmapNotify(window);
continue;
}
// ClientMessage
if (event.type == ClientMessage) {
Window window = event.xclient.window;
// check for net window manager state (fullscreen, maximized, etc)
if (event.xclient.message_type == XInternAtom(display, "_NET_WM_STATE", 0)) {
// see documentation in XWindowManagerStateEvent
Atom action = event.xclient.data.l[0];
Atom first = event.xclient.data.l[1];
Atom second = event.xclient.data.l[2];
// check if user is entering or exiting fullscreen
if (first == XInternAtom(display, "_NET_WM_STATE_FULLSCREEN", 0)) {
// get current size id
Rotation current_rotation;
XRRScreenConfiguration *conf = XRRGetScreenInfo(display, root);
SizeID current_size_id = XRRConfigCurrentConfiguration(conf, &current_rotation);
// window just went fullscreen
if (action == 1) {
// save current size id
last_size_id = current_size_id;
continue;
}
// window just exited fullscreen
if (action == 0) {
// if size id changed, that means user changed resolution while in fullscreen
// there is a bug in some window managers that causes the window to not resize
// if it was previously maximized, so we need to unmaximize it and maximize it again
if (current_size_id != last_size_id) {
// toggle maximized state twice
XWindowManagerStateEvent(display, window, 2,
XInternAtom(display, "_NET_WM_STATE_MAXIMIZED_VERT", 0),
XInternAtom(display, "_NET_WM_STATE_MAXIMIZED_HORZ", 0));
XWindowManagerStateEvent(display, window, 2,
XInternAtom(display, "_NET_WM_STATE_MAXIMIZED_VERT", 0),
XInternAtom(display, "_NET_WM_STATE_MAXIMIZED_HORZ", 0));
}
}
}
}
// check for window manager change state (minimize, maximize, etc)
if (event.xclient.message_type == XInternAtom(display, "WM_CHANGE_STATE", 0)) {
int window_state = event.xclient.data.l[0];
// NormalState - The client's top-level window is viewable.
// IconicState - The client's top-level window is iconic (whatever that means for this window manager).
// WithdrawnState - Neither the client's top-level window nor its icon is visible.
goXEventWMChangeState(display, window, window_state);
}
continue;
}
}
XCloseDisplay(display);
}
static void XWindowManagerStateEvent(Display *display, Window window, ulong action, ulong first, ulong second) {
Window root = DefaultRootWindow(display);
XClientMessageEvent clientMessageEvent;
memset(&clientMessageEvent, 0, sizeof(clientMessageEvent));
// window = the respective client window
// message_type = _NET_WM_STATE
// format = 32
// data.l[0] = the action, as listed below
// _NET_WM_STATE_REMOVE 0 // remove/unset property
// _NET_WM_STATE_ADD 1 // add/set property
// _NET_WM_STATE_TOGGLE 2 // toggle property
// data.l[1] = first property to alter
// data.l[2] = second property to alter
// data.l[3] = source indication
// other data.l[] elements = 0
clientMessageEvent.type = ClientMessage;
clientMessageEvent.window = window;
clientMessageEvent.message_type = XInternAtom(display, "_NET_WM_STATE", 0);
clientMessageEvent.format = 32;
clientMessageEvent.data.l[0] = action;
clientMessageEvent.data.l[1] = first;
clientMessageEvent.data.l[2] = second;
clientMessageEvent.data.l[3] = 1;
XSendEvent(display, root, 0, SubstructureRedirectMask | SubstructureNotifyMask, (XEvent *)&clientMessageEvent);
XFlush(display);
}
void XFileChooserHide(Display *display, Window window) {
// The WM_TRANSIENT_FOR property is defined by the [ICCCM] for managed windows.
// This specification extends the use of the property to override-redirect windows.
// If an override-redirect is a pop-up on behalf of another window, then the Client
// SHOULD set WM_TRANSIENT_FOR on the override-redirect to this other window.
//
// As an example, a Client should set WM_TRANSIENT_FOR on dropdown menus to the
// toplevel application window that contains the menubar.
// Remove WM_TRANSIENT_FOR
Atom WM_TRANSIENT_FOR = XInternAtom(display, "WM_TRANSIENT_FOR", 0);
XDeleteProperty(display, window, WM_TRANSIENT_FOR);
// Add _NET_WM_STATE_BELOW
XWindowManagerStateEvent(display, window, 1, // set property
XInternAtom(display, "_NET_WM_STATE_BELOW", 0), 0);
}