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