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// This file is part of river, a dynamic tiling wayland compositor.
//
// Copyright 2020 Isaac Freund
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
const Self = @This();
const std = @import("std");
const c = @import("c.zig");
const Box = @import("Box.zig");
const Log = @import("log.zig").Log;
const Output = @import("Output.zig");
const Root = @import("Root.zig");
const ViewStack = @import("view_stack.zig").ViewStack;
const XdgToplevel = @import("XdgToplevel.zig");
const ViewImpl = union(enum) {
xdg_toplevel: XdgToplevel,
};
/// The implementation of this view
impl: ViewImpl,
/// The output this view is currently associated with
output: *Output,
/// This is non-null exactly when the view is mapped
wlr_surface: ?*c.wlr_surface,
/// If the view is floating or not
floating: bool,
/// True if the view is currentlt focused by at lease one seat
focused: bool,
/// The current output-relative coordinates and dimensions of the view
current_box: Box,
pending_box: ?Box,
/// The dimensions the view would have taken if we didn't force it to tile
natural_width: u32,
natural_height: u32,
current_tags: u32,
pending_tags: ?u32,
pending_serial: ?u32,
// This is what we render while a transaction is in progress
stashed_buffer: ?*c.wlr_buffer,
pub fn init_xdg_toplevel(
self: *Self,
output: *Output,
tags: u32,
wlr_xdg_surface: *c.wlr_xdg_surface,
) void {
self.output = output;
self.wlr_surface = null;
self.focused = false;
self.current_box = Box{
.x = 0,
.y = 0,
.height = 0,
.width = 0,
};
self.pending_box = null;
self.current_tags = tags;
self.pending_tags = null;
self.pending_serial = null;
self.stashed_buffer = null;
self.impl = .{ .xdg_toplevel = undefined };
self.impl.xdg_toplevel.init(self, wlr_xdg_surface);
}
pub fn deinit(self: *Self) void {
if (self.stashed_buffer) |buffer| {
c.wlr_buffer_unref(buffer);
}
}
pub fn needsConfigure(self: Self) bool {
if (self.pending_box) |pending_box| {
return pending_box.width != self.current_box.width or
pending_box.height != self.current_box.height;
} else {
return false;
}
}
pub fn configure(self: Self) void {
if (self.pending_box) |pending_box| {
switch (self.impl) {
.xdg_toplevel => |xdg_toplevel| xdg_toplevel.configure(pending_box),
}
} else {
Log.Error.log("Configure called on a View with no pending box", .{});
}
}
pub fn sendFrameDone(self: Self) void {
var now: c.timespec = undefined;
_ = c.clock_gettime(c.CLOCK_MONOTONIC, &now);
c.wlr_surface_send_frame_done(self.wlr_surface.?, &now);
}
pub fn dropStashedBuffer(self: *Self) void {
// TODO: log debug error
if (self.stashed_buffer) |buffer| {
c.wlr_buffer_unref(buffer);
self.stashed_buffer = null;
}
}
pub fn stashBuffer(self: *Self) void {
// TODO: log debug error if there is already a saved buffer
if (self.wlr_surface) |wlr_surface| {
if (c.wlr_surface_has_buffer(wlr_surface)) {
_ = c.wlr_buffer_ref(wlr_surface.buffer);
self.stashed_buffer = wlr_surface.buffer;
}
}
}
/// Set the focued bool and the active state of the view if it is a toplevel
pub fn setFocused(self: *Self, focused: bool) void {
self.focused = focused;
switch (self.impl) {
.xdg_toplevel => |xdg_toplevel| xdg_toplevel.setActivated(focused),
}
}
/// If true is passsed, make the view float. If false, return it to the tiled
/// layout.
pub fn setFloating(self: *Self, float: bool) void {
if (float and !self.floating) {
self.floating = true;
self.pending_box = Box{
.x = std.math.max(0, @divTrunc(@intCast(i32, self.output.usable_box.width) -
@intCast(i32, self.natural_width), 2)),
.y = std.math.max(0, @divTrunc(@intCast(i32, self.output.usable_box.height) -
@intCast(i32, self.natural_height), 2)),
.width = self.natural_width,
.height = self.natural_height,
};
} else if (!float and self.floating) {
self.floating = false;
}
}
/// Move a view from one output to another, sending the required enter/leave
/// events.
pub fn sendToOutput(self: *Self, destination_output: *Output) void {
const node = @fieldParentPtr(ViewStack(Self).Node, "view", self);
self.output.views.remove(node);
destination_output.views.push(node);
c.wlr_surface_send_leave(self.wlr_surface, self.output.wlr_output);
c.wlr_surface_send_enter(self.wlr_surface, destination_output.wlr_output);
self.output = destination_output;
}
pub fn close(self: Self) void {
switch (self.impl) {
.xdg_toplevel => |xdg_toplevel| xdg_toplevel.close(),
}
}
pub fn forEachSurface(
self: Self,
iterator: c.wlr_surface_iterator_func_t,
user_data: ?*c_void,
) void {
switch (self.impl) {
.xdg_toplevel => |xdg_toplevel| xdg_toplevel.forEachSurface(iterator, user_data),
}
}
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