//! The symbolic icons the app names, carried inside the binary.
//!
//! Widgets here ask for icons by freedesktop name — `utilities-terminal-
//! symbolic`, `web-browser-symbolic`, and so on — and by default GTK resolves
//! those against whatever icon theme the host has installed. Recent
//! adwaita-icon-theme releases dropped many of these legacy names, so whether
//! a given machine still shows them is luck. This module removes the luck:
//! the icons are compiled into the binary as a GResource (see
//! `assets/icons/icons.gresource.xml` and the glib-compile-resources step in
//! `build.zig`) and registered with the icon theme at startup.
//!
//! Registration is deliberately as a *fallback*: `addResourcePath` folds the
//! bundle into hicolor, the theme of last resort, so a host theme that does
//! provide a name keeps winning and the app stays native-looking. The bundle
//! only answers for names the host can't.

const std = @import("std");
const gdk = @import("gdk");
const gio = @import("gio");
const glib = @import("glib");
const gtk = @import("gtk");

const data = @embedFile("icons.gresource");

/// Register the bundled icons. Called once at activation, before the first
/// window is built, so nothing is ever looked up ahead of it.
///
/// Failure is logged and swallowed: a missing icon renders as the
/// broken-image glyph, which is exactly the state this module exists to
/// avoid, but not a reason to refuse to open a window.
pub fn init() void {
    var err: ?*glib.Error = null;

    // newFromData copies if the embedded bytes aren't suitably aligned, so
    // static is safe here regardless of where @embedFile landed them.
    const bytes = glib.Bytes.newStatic(data, data.len);
    defer bytes.unref();

    const resource = gio.Resource.newFromData(bytes, &err) orelse {
        if (err) |e| {
            std.log.warn("failed to load bundled icons: {s}", .{e.f_message orelse "unknown"});
            e.free();
        }
        return;
    };
    gio.resourcesRegister(resource);

    if (gdk.Display.getDefault()) |display| {
        gtk.IconTheme.getForDisplay(display).addResourcePath("/dev/greyson/playpen/icons");
    }
}