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const std = @import("std");
const adw = @import("adw");
const gobject = @import("gobject");
const gtk = @import("gtk");
const gtk_version = @import("../gtk_version.zig");
const gresource = @import("../build/gresource.zig");
const Common = @import("../class.zig").Common;
const Surface = @import("surface.zig").Surface;
const Config = @import("config.zig").Config;
const log = std.log.scoped(.gtk_ghostty_surface_scrolled_window);
/// A wrapper widget that embeds a Surface inside a GtkScrolledWindow.
/// This provides scrollbar functionality for the terminal surface.
/// The surface property can be set during initialization or changed
/// dynamically via the surface property.
pub const SurfaceScrolledWindow = extern struct {
const Self = @This();
parent_instance: Parent,
pub const Parent = adw.Bin;
pub const getGObjectType = gobject.ext.defineClass(Self, .{
.name = "GhostttySurfaceScrolledWindow",
.instanceInit = &init,
.classInit = &Class.init,
.parent_class = &Class.parent,
.private = .{ .Type = Private, .offset = &Private.offset },
});
pub const properties = struct {
pub const config = struct {
pub const name = "config";
const impl = gobject.ext.defineProperty(
name,
Self,
?*Config,
.{
.accessor = C.privateObjFieldAccessor("config"),
},
);
};
pub const surface = struct {
pub const name = "surface";
const impl = gobject.ext.defineProperty(
name,
Self,
?*Surface,
.{
.accessor = .{
.getter = getSurfaceValue,
.setter = setSurfaceValue,
},
},
);
};
};
const Private = struct {
config: ?*Config = null,
config_binding: ?*gobject.Binding = null,
surface: ?*Surface = null,
scrolled_window: *gtk.ScrolledWindow,
pub var offset: c_int = 0;
};
fn init(self: *Self, _: *Class) callconv(.c) void {
gtk.Widget.initTemplate(self.as(gtk.Widget));
if (gtk_version.runtimeUntil(4, 20, 1)) self.disableKineticScroll();
}
fn disableKineticScroll(self: *Self) void {
// Until gtk 4.20.1 trackpads have kinetic scrolling behavior regardless
// of `Gtk.ScrolledWindow.kinetic_scrolling`. As a workaround, disable
// EventControllerScroll.kinetic
const controllers = self.private().scrolled_window.as(gtk.Widget).observeControllers();
defer controllers.unref();
var i: c_uint = 0;
while (controllers.getObject(i)) |obj| : (i += 1) {
defer obj.unref();
const controller = gobject.ext.cast(gtk.EventControllerScroll, obj) orelse continue;
var flags = controller.getFlags();
flags.kinetic = false;
controller.setFlags(flags);
}
}
fn dispose(self: *Self) callconv(.c) void {
const priv = self.private();
if (priv.config_binding) |binding| {
binding.unbind();
binding.unref();
priv.config_binding = null;
}
if (priv.config) |v| {
v.unref();
priv.config = null;
}
gtk.Widget.disposeTemplate(
self.as(gtk.Widget),
getGObjectType(),
);
gobject.Object.virtual_methods.dispose.call(
Class.parent,
self.as(Parent),
);
}
fn finalize(self: *Self) callconv(.c) void {
gobject.Object.virtual_methods.finalize.call(
Class.parent,
self.as(Parent),
);
}
fn getSurfaceValue(self: *Self, value: *gobject.Value) void {
gobject.ext.Value.set(
value,
self.private().surface,
);
}
fn setSurfaceValue(self: *Self, value: *const gobject.Value) void {
self.setSurface(gobject.ext.Value.get(
value,
?*Surface,
));
}
pub fn getSurface(self: *Self) ?*Surface {
return self.private().surface;
}
pub fn setSurface(self: *Self, surface_: ?*Surface) void {
const priv = self.private();
if (surface_ == priv.surface) return;
self.as(gobject.Object).freezeNotify();
defer self.as(gobject.Object).thawNotify();
self.as(gobject.Object).notifyByPspec(properties.surface.impl.param_spec);
priv.surface = surface_;
}
fn closureScrollbarPolicy(
_: *Self,
config_: ?*Config,
) callconv(.c) gtk.PolicyType {
const config = if (config_) |c| c.get() else return .automatic;
return switch (config.scrollbar) {
.never => .never,
.system => .automatic,
};
}
fn propSurface(
self: *Self,
_: *gobject.ParamSpec,
_: ?*anyopaque,
) callconv(.c) void {
const priv = self.private();
const scrolled_window = self.private().scrolled_window.as(gtk.ScrolledWindow);
scrolled_window.setChild(if (priv.surface) |s| s.as(gtk.Widget) else null);
// Unbind old config binding if it exists
if (priv.config_binding) |binding| {
binding.unbind();
binding.unref();
priv.config_binding = null;
}
// Bind config from surface to our config property
if (priv.surface) |surface| {
const binding = surface.as(gobject.Object).bindProperty(
properties.config.name,
self.as(gobject.Object),
properties.config.name,
.{ .sync_create = true },
);
// Keep another ref, otherwise the binding would be freed and
// our pointer become stale if the surface gets finalized.
binding.ref();
priv.config_binding = binding;
}
}
const C = Common(Self, Private);
pub const as = C.as;
pub const ref = C.ref;
pub const unref = C.unref;
const private = C.private;
pub const Class = extern struct {
parent_class: Parent.Class,
var parent: *Parent.Class = undefined;
pub const Instance = Self;
fn init(class: *Class) callconv(.c) void {
gtk.Widget.Class.setTemplateFromResource(
class.as(gtk.Widget.Class),
comptime gresource.blueprint(.{
.major = 1,
.minor = 5,
.name = "surface-scrolled-window",
}),
);
// Bindings
class.bindTemplateCallback("scrollbar_policy", &closureScrollbarPolicy);
class.bindTemplateCallback("notify_surface", &propSurface);
class.bindTemplateChildPrivate("scrolled_window", .{});
// Properties
gobject.ext.registerProperties(class, &.{
properties.config.impl,
properties.surface.impl,
});
// Virtual methods
gobject.Object.virtual_methods.dispose.implement(class, &dispose);
gobject.Object.virtual_methods.finalize.implement(class, &finalize);
}
pub const as = C.Class.as;
pub const bindTemplateChildPrivate = C.Class.bindTemplateChildPrivate;
pub const bindTemplateCallback = C.Class.bindTemplateCallback;
};
};
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