142 lines
3.9 KiB
Rust
142 lines
3.9 KiB
Rust
use {
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crate::{
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client::{Client, ClientError},
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ifs::{
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ipc::wl_data_source::WlDataSource, wl_seat::WlSeatGlobal,
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wl_surface::xdg_surface::xdg_toplevel::XdgToplevel,
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},
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leaks::Tracker,
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object::{Object, Version},
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utils::clonecell::CloneCell,
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wire::{xdg_toplevel_drag_v1::*, XdgToplevelDragV1Id},
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},
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std::{cell::Cell, rc::Rc},
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thiserror::Error,
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};
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pub struct XdgToplevelDragV1 {
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pub id: XdgToplevelDragV1Id,
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pub client: Rc<Client>,
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pub source: Rc<WlDataSource>,
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pub tracker: Tracker<Self>,
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pub toplevel: CloneCell<Option<Rc<XdgToplevel>>>,
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pub x_off: Cell<i32>,
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pub y_off: Cell<i32>,
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pub version: Version,
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}
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impl XdgToplevelDragV1 {
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pub fn new(id: XdgToplevelDragV1Id, source: &Rc<WlDataSource>, version: Version) -> Self {
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Self {
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id,
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client: source.data.client.clone(),
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source: source.clone(),
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tracker: Default::default(),
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toplevel: Default::default(),
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x_off: Cell::new(0),
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y_off: Cell::new(0),
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version,
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}
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}
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pub fn is_ongoing(&self) -> bool {
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self.source.data.was_used() && !self.source.data.was_dropped_or_cancelled()
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}
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fn detach(&self) {
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self.source.toplevel_drag.take();
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if let Some(tl) = self.toplevel.take() {
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tl.drag.take();
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}
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}
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}
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impl XdgToplevelDragV1RequestHandler for XdgToplevelDragV1 {
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type Error = XdgToplevelDragV1Error;
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fn destroy(&self, _req: Destroy, _slf: &Rc<Self>) -> Result<(), Self::Error> {
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if self.is_ongoing() {
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return Err(XdgToplevelDragV1Error::ActiveDrag);
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}
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self.detach();
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self.client.remove_obj(self)?;
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Ok(())
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}
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fn attach(&self, req: Attach, slf: &Rc<Self>) -> Result<(), Self::Error> {
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if self.source.data.was_dropped_or_cancelled() {
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return Ok(());
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}
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let toplevel = self.client.lookup(req.toplevel)?;
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if toplevel.drag.set(Some(slf.clone())).is_some() {
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return Err(XdgToplevelDragV1Error::AlreadyDragged);
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}
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if let Some(prev) = self.toplevel.set(Some(toplevel)) {
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if prev.xdg.surface.buffer.is_some() {
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return Err(XdgToplevelDragV1Error::ToplevelAttached);
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}
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if prev.id != req.toplevel {
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prev.drag.set(None);
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}
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}
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self.x_off.set(req.x_offset);
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self.y_off.set(req.y_offset);
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self.start_drag();
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Ok(())
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}
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}
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impl XdgToplevelDragV1 {
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pub fn start_drag(&self) {
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if !self.is_ongoing() {
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return;
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}
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let Some(tl) = self.toplevel.get() else {
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return;
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};
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tl.prepare_toplevel_drag();
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self.client.state.tree_changed();
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}
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pub fn finish_drag(&self, seat: &Rc<WlSeatGlobal>) {
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if self.source.data.was_used() {
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if let Some(tl) = self.toplevel.get() {
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let output = seat.get_output();
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let (x, y) = seat.position();
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tl.drag.take();
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tl.after_toplevel_drag(
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&output,
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x.round_down() - self.x_off.get(),
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y.round_down() - self.y_off.get(),
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);
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}
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}
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self.detach();
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}
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}
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object_base! {
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self = XdgToplevelDragV1;
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version = self.version;
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}
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impl Object for XdgToplevelDragV1 {
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fn break_loops(&self) {
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self.detach();
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}
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}
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simple_add_obj!(XdgToplevelDragV1);
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#[derive(Debug, Error)]
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pub enum XdgToplevelDragV1Error {
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#[error(transparent)]
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ClientError(Box<ClientError>),
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#[error("The toplevel already has a drag attached")]
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AlreadyDragged,
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#[error("There already is a mapped toplevel attached")]
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ToplevelAttached,
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#[error("The drag is ongoing")]
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ActiveDrag,
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}
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efrom!(XdgToplevelDragV1Error, ClientError);
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