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const std = @import("std");
const c = @import("c.zig").c;
const Root = @import("root.zig").Root;
pub const ViewState = struct {
x: i32,
y: i32,
width: u32,
height: u32,
};
pub const View = struct {
const Self = @This();
root: *Root,
wlr_xdg_surface: *c.wlr_xdg_surface,
mapped: bool,
current_state: ViewState,
// TODO: make this a ?ViewState
pending_state: ViewState,
pending_serial: ?u32,
// This is what we render while a transaction is in progress
stashed_buffer: ?*c.wlr_buffer,
listen_map: c.wl_listener,
listen_unmap: c.wl_listener,
listen_destroy: c.wl_listener,
listen_commit: c.wl_listener,
// listen_request_move: c.wl_listener,
// listen_request_resize: c.wl_listener,
pub fn init(self: *Self, root: *Root, wlr_xdg_surface: *c.wlr_xdg_surface) void {
self.root = root;
self.wlr_xdg_surface = wlr_xdg_surface;
self.mapped = false;
self.current_state = ViewState{
.x = 0,
.y = 0,
.height = 0,
.width = 0,
};
self.stashed_buffer = null;
self.listen_map.notify = handleMap;
c.wl_signal_add(&self.wlr_xdg_surface.events.map, &self.listen_map);
self.listen_unmap.notify = handleUnmap;
c.wl_signal_add(&self.wlr_xdg_surface.events.unmap, &self.listen_unmap);
self.listen_destroy.notify = handleDestroy;
c.wl_signal_add(&self.wlr_xdg_surface.events.destroy, &self.listen_destroy);
self.listen_commit.notify = handleCommit;
c.wl_signal_add(&self.wlr_xdg_surface.surface.*.events.commit, &self.listen_commit);
// const toplevel = xdg_surface.unnamed_160.toplevel;
// c.wl_signal_add(&toplevel.events.request_move, &view.request_move);
// c.wl_signal_add(&toplevel.events.request_resize, &view.request_resize);
}
pub fn needsConfigure(self: *const Self) bool {
return self.pending_state.width != self.current_state.width or
self.pending_state.height != self.current_state.height;
}
pub fn configurePending(self: *Self) void {
self.pending_serial = c.wlr_xdg_toplevel_set_size(
self.wlr_xdg_surface,
self.pending_state.width,
self.pending_state.height,
);
}
pub fn sendFrameDone(self: *Self) void {
var now: c.struct_timespec = undefined;
_ = c.clock_gettime(c.CLOCK_MONOTONIC, &now);
c.wlr_surface_send_frame_done(self.wlr_xdg_surface.surface, &now);
}
pub fn dropStashedBuffer(self: *Self) void {
std.debug.warn("drop stashed\n", .{});
// TODO: log debug error
if (self.stashed_buffer) |buffer| {
c.wlr_buffer_unref(buffer);
std.debug.warn("drop stashed\n", .{});
self.stashed_buffer = null;
}
}
pub fn stashBuffer(self: *Self) void {
// TODO: log debug error if there is already a saved buffer
const wlr_surface = self.wlr_xdg_surface.surface;
if (c.wlr_surface_has_buffer(wlr_surface)) {
_ = c.wlr_buffer_ref(wlr_surface.*.buffer);
self.stashed_buffer = wlr_surface.*.buffer;
}
}
fn handleMap(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
// Called when the surface is mapped, or ready to display on-screen.
const view = @fieldParentPtr(View, "listen_map", listener.?);
view.mapped = true;
view.focus(view.wlr_xdg_surface.surface);
const node = @fieldParentPtr(std.TailQueue(View).Node, "data", view);
view.root.unmapped_views.remove(node);
view.root.views.append(node);
view.root.arrange();
}
fn handleUnmap(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const view = @fieldParentPtr(View, "listen_unmap", listener.?);
const root = view.root;
view.mapped = false;
if (root.focused_view) |current_focus| {
// If the view being unmapped is focused
if (current_focus == view) {
// If there are more views
if (root.views.len > 1) {
// Focus the next view.
root.focusNextView();
} else {
// Otherwise clear the focus
root.focused_view = null;
_ = c.wlr_xdg_toplevel_set_activated(view.wlr_xdg_surface, false);
}
}
}
const node = @fieldParentPtr(std.TailQueue(View).Node, "data", view);
root.views.remove(node);
root.unmapped_views.append(node);
root.arrange();
}
fn handleDestroy(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const view = @fieldParentPtr(View, "listen_destroy", listener.?);
const root = view.root;
const node = @fieldParentPtr(std.TailQueue(View).Node, "data", view);
root.unmapped_views.remove(node);
root.unmapped_views.destroyNode(node, root.server.allocator);
}
fn handleCommit(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
const view = @fieldParentPtr(View, "listen_commit", listener.?);
if (view.pending_serial) |s| {
if (s == view.wlr_xdg_surface.configure_serial) {
view.root.notifyConfigured();
view.pending_serial = null;
}
}
// TODO: check for unexpected change in size and react as needed
}
// fn xdgToplevelRequestMove(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
// // ignore for now
// }
// fn xdgToplevelRequestResize(listener: ?*c.wl_listener, data: ?*c_void) callconv(.C) void {
// // ignore for now
// }
fn focus(self: *Self, surface: *c.wlr_surface) void {
const root = self.root;
const wlr_seat = root.server.seat.wlr_seat;
const prev_surface = wlr_seat.keyboard_state.focused_surface;
if (prev_surface == surface) {
// Don't re-focus an already focused surface.
// TODO: debug message?
return;
}
root.focused_view = self;
if (prev_surface != null) {
// Deactivate the previously focused surface. This lets the client know
// it no longer has focus and the client will repaint accordingly, e.g.
// stop displaying a caret.
const prev_xdg_surface = c.wlr_xdg_surface_from_wlr_surface(prev_surface);
_ = c.wlr_xdg_toplevel_set_activated(prev_xdg_surface, false);
}
// Activate the new surface
_ = c.wlr_xdg_toplevel_set_activated(self.wlr_xdg_surface, true);
// Tell the seat to have the keyboard enter this surface. wlroots will keep
// track of this and automatically send key events to the appropriate
// clients without additional work on your part.
const keyboard: *c.wlr_keyboard = c.wlr_seat_get_keyboard(wlr_seat);
c.wlr_seat_keyboard_notify_enter(
wlr_seat,
self.wlr_xdg_surface.surface,
&keyboard.keycodes,
keyboard.num_keycodes,
&keyboard.modifiers,
);
}
fn isAt(self: *Self, lx: f64, ly: f64, surface: *?*c.wlr_surface, sx: *f64, sy: *f64) bool {
// XDG toplevels may have nested surfaces, such as popup windows for context
// menus or tooltips. This function tests if any of those are underneath the
// coordinates lx and ly (in output Layout Coordinates). If so, it sets the
// surface pointer to that wlr_surface and the sx and sy coordinates to the
// coordinates relative to that surface's top-left corner.
const view_sx = lx - @intToFloat(f64, self.current_state.x);
const view_sy = ly - @intToFloat(f64, self.current_state.y);
// This variable seems to have been unsued in TinyWL
// struct wlr_surface_state *state = &view->xdg_surface->surface->current;
var _sx: f64 = undefined;
var _sy: f64 = undefined;
const _surface = c.wlr_xdg_surface_surface_at(self.wlr_xdg_surface, view_sx, view_sy, &_sx, &_sy);
if (_surface) |surface_at| {
sx.* = _sx;
sy.* = _sy;
surface.* = surface_at;
return true;
}
return false;
}
};
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