594 lines
21 KiB
Zig
594 lines
21 KiB
Zig
// This file is part of river, a dynamic tiling wayland compositor.
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//
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// Copyright 2020 The River Developers
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, version 3.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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const Self = @This();
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const build_options = @import("build_options");
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const std = @import("std");
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const assert = std.debug.assert;
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const math = std.math;
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const os = std.os;
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const wlr = @import("wlroots");
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const wl = @import("wayland").server.wl;
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const server = &@import("main.zig").server;
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const util = @import("util.zig");
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const ForeignToplevelHandle = @import("ForeignToplevelHandle.zig");
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const Output = @import("Output.zig");
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const SceneNodeData = @import("SceneNodeData.zig");
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const Seat = @import("Seat.zig");
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const XdgToplevel = @import("XdgToplevel.zig");
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const XwaylandView = @import("XwaylandView.zig");
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const log = std.log.scoped(.view);
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pub const Constraints = struct {
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min_width: u31 = 1,
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max_width: u31 = math.maxInt(u31),
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min_height: u31 = 1,
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max_height: u31 = math.maxInt(u31),
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};
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const Impl = union(enum) {
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xdg_toplevel: XdgToplevel,
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xwayland_view: if (build_options.xwayland) XwaylandView else noreturn,
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/// This state is assigned during destruction after the xdg toplevel
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/// has been destroyed but while the transaction system is still rendering
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/// saved surfaces of the view.
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/// The xdg_toplevel could simply be set to undefined instead, but using a
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/// tag like this gives us better safety checks.
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none,
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};
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pub const State = struct {
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/// The output the view is currently assigned to.
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/// May be null if there are no outputs or for newly created views.
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/// Must be set using setPendingOutput()
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output: ?*Output = null,
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/// The output-relative coordinates of the view and dimensions requested by river.
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box: wlr.Box = .{ .x = 0, .y = 0, .width = 0, .height = 0 },
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/// The tags of the view, as a bitmask
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tags: u32 = 0,
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/// Number of seats currently focusing the view
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focus: u32 = 0,
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float: bool = false,
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fullscreen: bool = false,
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urgent: bool = false,
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ssd: bool = false,
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resizing: bool = false,
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/// Modify the x/y of the given state by delta_x/delta_y, clamping to the
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/// bounds of the output.
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pub fn move(state: *State, delta_x: i32, delta_y: i32) void {
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const border_width = if (state.ssd) server.config.border_width else 0;
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var output_width: i32 = math.maxInt(i32);
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var output_height: i32 = math.maxInt(i32);
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if (state.output) |output| {
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output.wlr_output.effectiveResolution(&output_width, &output_height);
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}
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const max_x = output_width - state.box.width - border_width;
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state.box.x += delta_x;
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state.box.x = @max(state.box.x, border_width);
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state.box.x = @min(state.box.x, max_x);
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state.box.x = @max(state.box.x, 0);
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const max_y = output_height - state.box.height - border_width;
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state.box.y += delta_y;
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state.box.y = @max(state.box.y, border_width);
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state.box.y = @min(state.box.y, max_y);
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state.box.y = @max(state.box.y, 0);
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}
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pub fn clampToOutput(state: *State) void {
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const output = state.output orelse return;
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var output_width: i32 = undefined;
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var output_height: i32 = undefined;
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output.wlr_output.effectiveResolution(&output_width, &output_height);
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const border_width = if (state.ssd) server.config.border_width else 0;
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state.box.width = @min(state.box.width, output_width - (2 * border_width));
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state.box.height = @min(state.box.height, output_height - (2 * border_width));
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state.move(0, 0);
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}
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};
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/// The implementation of this view
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impl: Impl,
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/// Link for Root.views
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link: wl.list.Link,
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tree: *wlr.SceneTree,
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surface_tree: *wlr.SceneTree,
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saved_surface_tree: *wlr.SceneTree,
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borders: struct {
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left: *wlr.SceneRect,
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right: *wlr.SceneRect,
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top: *wlr.SceneRect,
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bottom: *wlr.SceneRect,
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},
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popup_tree: *wlr.SceneTree,
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/// Bounds on the width/height of the view, set by the xdg_toplevel/xwayland_view implementation.
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constraints: Constraints = .{},
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mapped: bool = false,
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/// This indicates that the view should be destroyed when the current
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/// transaction completes. See View.destroy()
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destroying: bool = false,
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/// The state of the view that is directly acted upon/modified through user input.
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///
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/// Pending state will be copied to the inflight state and communicated to clients
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/// to be applied as a single atomic transaction across all clients as soon as any
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/// in progress transaction has been completed.
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///
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/// Any time pending state is modified Root.applyPending() must be called
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/// before yielding back to the event loop.
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pending: State = .{},
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pending_focus_stack_link: wl.list.Link,
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pending_wm_stack_link: wl.list.Link,
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/// The state most recently sent to the layout generator and clients.
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/// This state is immutable until all clients have replied and the transaction
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/// is completed, at which point this inflight state is copied to current.
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inflight: State = .{},
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inflight_focus_stack_link: wl.list.Link,
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inflight_wm_stack_link: wl.list.Link,
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/// The current state represented by the scene graph.
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current: State = .{},
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/// The floating dimensions the view, saved so that they can be restored if the
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/// view returns to floating mode.
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float_box: wlr.Box = undefined,
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/// This state exists purely to allow for more intuitive behavior when
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/// exiting fullscreen if there is no active layout.
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post_fullscreen_box: wlr.Box = undefined,
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foreign_toplevel_handle: ForeignToplevelHandle = .{},
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pub fn create(impl: Impl) error{OutOfMemory}!*Self {
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assert(impl != .none);
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const view = try util.gpa.create(Self);
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errdefer util.gpa.destroy(view);
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const tree = try server.root.hidden.tree.createSceneTree();
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errdefer tree.node.destroy();
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const popup_tree = try server.root.hidden.tree.createSceneTree();
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errdefer popup_tree.node.destroy();
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view.* = .{
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.impl = impl,
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.link = undefined,
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.tree = tree,
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.surface_tree = try tree.createSceneTree(),
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.saved_surface_tree = try tree.createSceneTree(),
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.borders = .{
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.left = try tree.createSceneRect(0, 0, &server.config.border_color_unfocused),
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.right = try tree.createSceneRect(0, 0, &server.config.border_color_unfocused),
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.top = try tree.createSceneRect(0, 0, &server.config.border_color_unfocused),
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.bottom = try tree.createSceneRect(0, 0, &server.config.border_color_unfocused),
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},
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.popup_tree = popup_tree,
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.pending_wm_stack_link = undefined,
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.pending_focus_stack_link = undefined,
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.inflight_wm_stack_link = undefined,
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.inflight_focus_stack_link = undefined,
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};
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server.root.views.prepend(view);
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server.root.hidden.pending.focus_stack.prepend(view);
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server.root.hidden.pending.wm_stack.prepend(view);
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server.root.hidden.inflight.focus_stack.prepend(view);
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server.root.hidden.inflight.wm_stack.prepend(view);
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view.tree.node.setEnabled(false);
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view.popup_tree.node.setEnabled(false);
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view.saved_surface_tree.node.setEnabled(false);
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try SceneNodeData.attach(&view.tree.node, .{ .view = view });
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try SceneNodeData.attach(&view.popup_tree.node, .{ .view = view });
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return view;
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}
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/// If saved buffers of the view are currently in use by a transaction,
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/// mark this view for destruction when the transaction completes. Otherwise
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/// destroy immediately.
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pub fn destroy(view: *Self) void {
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assert(view.impl == .none);
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view.destroying = true;
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// If there are still saved buffers, then this view needs to be kept
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// around until the current transaction completes. This function will be
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// called again in Root.commitTransaction()
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if (!view.saved_surface_tree.node.enabled) {
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view.tree.node.destroy();
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view.popup_tree.node.destroy();
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view.link.remove();
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view.pending_focus_stack_link.remove();
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view.pending_wm_stack_link.remove();
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view.inflight_focus_stack_link.remove();
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view.inflight_wm_stack_link.remove();
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util.gpa.destroy(view);
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}
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}
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/// The change in x/y position of the view during resize cannot be determined
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/// until the size of the buffer actually committed is known. Clients are permitted
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/// by the protocol to take a size smaller than that requested by the compositor in
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/// order to maintain an aspect ratio or similar (mpv does this for example).
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pub fn resizeUpdatePosition(view: *Self, width: i32, height: i32) void {
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assert(view.inflight.resizing);
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const data = blk: {
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var it = server.input_manager.seats.first;
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while (it) |node| : (it = node.next) {
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const cursor = &node.data.cursor;
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if (cursor.inflight_mode == .resize and cursor.inflight_mode.resize.view == view) {
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break :blk cursor.inflight_mode.resize;
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}
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} else {
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// The view resizing state should never be set when the view is
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// not the target of an interactive resize.
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unreachable;
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}
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};
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if (data.edges.left) {
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view.inflight.box.x += view.current.box.width - width;
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view.pending.box.x = view.inflight.box.x;
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}
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if (data.edges.top) {
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view.inflight.box.y += view.current.box.height - height;
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view.pending.box.y = view.inflight.box.y;
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}
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}
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pub fn updateCurrent(view: *Self) void {
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const config = &server.config;
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switch (view.impl) {
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.xdg_toplevel => |*xdg_toplevel| {
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switch (xdg_toplevel.configure_state) {
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// If the configure timed out, don't update current to dimensions
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// that have not been committed by the client.
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.inflight, .acked => {
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if (view.inflight.resizing) {
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view.resizeUpdatePosition(view.current.box.width, view.current.box.height);
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}
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view.inflight.box.width = view.current.box.width;
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view.inflight.box.height = view.current.box.height;
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view.pending.box.width = view.current.box.width;
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view.pending.box.height = view.current.box.height;
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},
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.idle, .committed => {},
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}
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xdg_toplevel.configure_state = .idle;
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},
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.xwayland_view => |xwayland_view| {
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if (view.inflight.resizing) {
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view.resizeUpdatePosition(
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xwayland_view.xwayland_surface.width,
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xwayland_view.xwayland_surface.height,
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);
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}
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view.inflight.box.width = xwayland_view.xwayland_surface.width;
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view.inflight.box.height = xwayland_view.xwayland_surface.height;
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view.pending.box.width = xwayland_view.xwayland_surface.width;
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view.pending.box.height = xwayland_view.xwayland_surface.height;
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},
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.none => {},
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}
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view.foreign_toplevel_handle.update();
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view.current = view.inflight;
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view.dropSavedSurfaceTree();
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const color = blk: {
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if (view.current.urgent) break :blk &config.border_color_urgent;
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if (view.current.focus != 0) break :blk &config.border_color_focused;
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break :blk &config.border_color_unfocused;
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};
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const box = &view.current.box;
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view.tree.node.setPosition(box.x, box.y);
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view.popup_tree.node.setPosition(box.x, box.y);
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const enable_borders = view.current.ssd and !view.current.fullscreen;
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const border_width: c_int = config.border_width;
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view.borders.left.node.setEnabled(enable_borders);
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view.borders.left.node.setPosition(-border_width, -border_width);
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view.borders.left.setSize(border_width, box.height + 2 * border_width);
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view.borders.left.setColor(color);
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view.borders.right.node.setEnabled(enable_borders);
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view.borders.right.node.setPosition(box.width, -border_width);
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view.borders.right.setSize(border_width, box.height + 2 * border_width);
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view.borders.right.setColor(color);
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view.borders.top.node.setEnabled(enable_borders);
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view.borders.top.node.setPosition(0, -border_width);
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view.borders.top.setSize(box.width, border_width);
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view.borders.top.setColor(color);
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view.borders.bottom.node.setEnabled(enable_borders);
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view.borders.bottom.node.setPosition(0, box.height);
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view.borders.bottom.setSize(box.width, border_width);
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view.borders.bottom.setColor(color);
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}
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/// Returns true if the configure should be waited for by the transaction system.
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pub fn configure(self: *Self) bool {
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assert(self.mapped and !self.destroying);
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switch (self.impl) {
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.xdg_toplevel => |*xdg_toplevel| return xdg_toplevel.configure(),
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.xwayland_view => |*xwayland_view| return xwayland_view.configure(),
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.none => unreachable,
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}
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}
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pub fn rootSurface(self: Self) *wlr.Surface {
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assert(self.mapped and !self.destroying);
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return switch (self.impl) {
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.xdg_toplevel => |xdg_toplevel| xdg_toplevel.rootSurface(),
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.xwayland_view => |xwayland_view| xwayland_view.rootSurface(),
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.none => unreachable,
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};
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}
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pub fn sendFrameDone(self: Self) void {
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assert(self.mapped and !self.destroying);
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var now: os.timespec = undefined;
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os.clock_gettime(os.CLOCK.MONOTONIC, &now) catch @panic("CLOCK_MONOTONIC not supported");
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self.rootSurface().sendFrameDone(&now);
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}
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pub fn dropSavedSurfaceTree(self: *Self) void {
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if (!self.saved_surface_tree.node.enabled) return;
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var it = self.saved_surface_tree.children.safeIterator(.forward);
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while (it.next()) |node| node.destroy();
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self.saved_surface_tree.node.setEnabled(false);
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self.surface_tree.node.setEnabled(true);
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}
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pub fn saveSurfaceTree(self: *Self) void {
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assert(!self.saved_surface_tree.node.enabled);
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assert(self.saved_surface_tree.children.empty());
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self.surface_tree.node.forEachBuffer(*wlr.SceneTree, saveSurfaceTreeIter, self.saved_surface_tree);
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self.surface_tree.node.setEnabled(false);
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self.saved_surface_tree.node.setEnabled(true);
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}
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fn saveSurfaceTreeIter(
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buffer: *wlr.SceneBuffer,
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sx: c_int,
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sy: c_int,
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saved_surface_tree: *wlr.SceneTree,
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) void {
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const saved = saved_surface_tree.createSceneBuffer(buffer.buffer) catch {
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log.err("out of memory", .{});
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return;
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};
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saved.node.setPosition(sx, sy);
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saved.setDestSize(buffer.dst_width, buffer.dst_height);
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saved.setSourceBox(&buffer.src_box);
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saved.setTransform(buffer.transform);
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}
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pub fn setPendingOutput(view: *Self, output: *Output) void {
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view.pending.output = output;
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view.pending_wm_stack_link.remove();
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view.pending_focus_stack_link.remove();
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switch (server.config.attach_mode) {
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.top => output.pending.wm_stack.prepend(view),
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.bottom => output.pending.wm_stack.append(view),
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}
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output.pending.focus_stack.prepend(view);
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if (view.pending.fullscreen) {
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view.pending.box = .{ .x = 0, .y = 0, .width = undefined, .height = undefined };
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output.wlr_output.effectiveResolution(&view.pending.box.width, &view.pending.box.height);
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} else if (view.pending.float) {
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view.pending.clampToOutput();
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}
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}
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pub fn close(self: Self) void {
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assert(!self.destroying);
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switch (self.impl) {
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.xdg_toplevel => |xdg_toplevel| xdg_toplevel.close(),
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.xwayland_view => |xwayland_view| xwayland_view.close(),
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.none => unreachable,
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}
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}
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pub fn destroyPopups(self: Self) void {
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assert(!self.destroying);
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switch (self.impl) {
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.xdg_toplevel => |xdg_toplevel| xdg_toplevel.destroyPopups(),
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.xwayland_view => {},
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.none => unreachable,
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}
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}
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/// Return the current title of the view if any.
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pub fn getTitle(self: Self) ?[*:0]const u8 {
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assert(!self.destroying);
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return switch (self.impl) {
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.xdg_toplevel => |xdg_toplevel| xdg_toplevel.getTitle(),
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.xwayland_view => |xwayland_view| xwayland_view.getTitle(),
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.none => unreachable,
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};
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}
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/// Return the current app_id of the view if any.
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pub fn getAppId(self: Self) ?[*:0]const u8 {
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assert(!self.destroying);
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return switch (self.impl) {
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.xdg_toplevel => |xdg_toplevel| xdg_toplevel.getAppId(),
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.xwayland_view => |xwayland_view| xwayland_view.getAppId(),
|
|
.none => unreachable,
|
|
};
|
|
}
|
|
|
|
/// Clamp the width/height of the box to the constraints of the view
|
|
pub fn applyConstraints(self: *Self, box: *wlr.Box) void {
|
|
box.width = math.clamp(box.width, self.constraints.min_width, self.constraints.max_width);
|
|
box.height = math.clamp(box.height, self.constraints.min_height, self.constraints.max_height);
|
|
}
|
|
|
|
/// Called by the impl when the surface is ready to be displayed
|
|
pub fn map(view: *Self) !void {
|
|
log.debug("view '{?s}' mapped", .{view.getTitle()});
|
|
|
|
assert(!view.mapped and !view.destroying);
|
|
view.mapped = true;
|
|
|
|
view.foreign_toplevel_handle.map();
|
|
|
|
if (server.config.rules.float.match(view)) |float| {
|
|
view.pending.float = float;
|
|
}
|
|
if (server.config.rules.fullscreen.match(view)) |fullscreen| {
|
|
view.pending.fullscreen = fullscreen;
|
|
}
|
|
if (server.config.rules.ssd.match(view)) |ssd| {
|
|
view.pending.ssd = ssd;
|
|
}
|
|
|
|
if (server.config.rules.dimensions.match(view)) |dimensions| {
|
|
view.pending.box.width = dimensions.width;
|
|
view.pending.box.height = dimensions.height;
|
|
}
|
|
|
|
const output = try server.config.outputRuleMatch(view) orelse
|
|
server.input_manager.defaultSeat().focused_output;
|
|
|
|
if (server.config.rules.position.match(view)) |position| {
|
|
view.pending.box.x = position.x;
|
|
view.pending.box.y = position.y;
|
|
} else if (output) |o| {
|
|
// Center the initial pending box on the output
|
|
view.pending.box.x = @divTrunc(@max(0, o.usable_box.width - view.pending.box.width), 2);
|
|
view.pending.box.y = @divTrunc(@max(0, o.usable_box.height - view.pending.box.height), 2);
|
|
}
|
|
|
|
view.pending.tags = blk: {
|
|
const default = if (output) |o| o.pending.tags else server.root.fallback.tags;
|
|
if (server.config.rules.tags.match(view)) |tags| break :blk tags;
|
|
const tags = default & server.config.spawn_tagmask;
|
|
break :blk if (tags != 0) tags else default;
|
|
};
|
|
|
|
if (output) |o| {
|
|
view.setPendingOutput(o);
|
|
|
|
var it = server.input_manager.seats.first;
|
|
while (it) |seat_node| : (it = seat_node.next) seat_node.data.focus(view);
|
|
} else {
|
|
log.debug("no output available for newly mapped view, adding to fallback stacks", .{});
|
|
|
|
view.pending_wm_stack_link.remove();
|
|
view.pending_focus_stack_link.remove();
|
|
|
|
switch (server.config.attach_mode) {
|
|
.top => server.root.fallback.pending.wm_stack.prepend(view),
|
|
.bottom => server.root.fallback.pending.wm_stack.append(view),
|
|
}
|
|
server.root.fallback.pending.focus_stack.prepend(view);
|
|
|
|
view.inflight_wm_stack_link.remove();
|
|
view.inflight_wm_stack_link.init();
|
|
|
|
view.inflight_focus_stack_link.remove();
|
|
view.inflight_focus_stack_link.init();
|
|
}
|
|
|
|
view.float_box = view.pending.box;
|
|
|
|
server.root.applyPending();
|
|
}
|
|
|
|
/// Called by the impl when the surface will no longer be displayed
|
|
pub fn unmap(view: *Self) void {
|
|
log.debug("view '{?s}' unmapped", .{view.getTitle()});
|
|
|
|
if (!view.saved_surface_tree.node.enabled) view.saveSurfaceTree();
|
|
|
|
{
|
|
view.pending.output = null;
|
|
view.pending_focus_stack_link.remove();
|
|
view.pending_wm_stack_link.remove();
|
|
server.root.hidden.pending.focus_stack.prepend(view);
|
|
server.root.hidden.pending.wm_stack.prepend(view);
|
|
}
|
|
|
|
assert(view.mapped and !view.destroying);
|
|
view.mapped = false;
|
|
|
|
view.foreign_toplevel_handle.unmap();
|
|
|
|
server.root.applyPending();
|
|
}
|
|
|
|
pub fn notifyTitle(view: *const Self) void {
|
|
if (view.foreign_toplevel_handle.wlr_handle) |wlr_handle| {
|
|
if (view.getTitle()) |title| wlr_handle.setTitle(title);
|
|
}
|
|
// Send title to all status listeners attached to a seat which focuses this view
|
|
var seat_it = server.input_manager.seats.first;
|
|
while (seat_it) |seat_node| : (seat_it = seat_node.next) {
|
|
if (seat_node.data.focused == .view and seat_node.data.focused.view == view) {
|
|
var client_it = seat_node.data.status_trackers.first;
|
|
while (client_it) |client_node| : (client_it = client_node.next) {
|
|
client_node.data.sendFocusedView();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
pub fn notifyAppId(view: Self) void {
|
|
if (view.foreign_toplevel_handle.wlr_handle) |wlr_handle| {
|
|
if (view.getAppId()) |app_id| wlr_handle.setAppId(app_id);
|
|
}
|
|
}
|