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apprt/gtk: stylistic changes

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This commit is contained in:
Mitchell Hashimoto
2023-12-31 07:50:36 -08:00
parent fc4fdbb643
commit 3b7e83150f
2 changed files with 84 additions and 51 deletions
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16
src/apprt/gtk/Surface.zig
View File

@ -360,10 +360,7 @@ pub fn init(self: *Surface, app: *App, opts: Options) !void {
errdefer self.* = undefined;
// Set up Xkb if we are running under X11.
const display = c.gdk_display_get_default();
if (x11.x11_is_display(display)) {
self.x11_xkb = try x11.X11Xkb.init(display);
}
self.x11_xkb = try x11.X11Xkb.init(c.gdk_display_get_default());
// Set our default mouse shape
try self.setMouseShape(.text);
@ -1345,18 +1342,21 @@ fn keyEvent(
_ = gtk_mods;
const device = c.gdk_event_get_device(event);
var mods = if (self.x11_xkb) |x11_xkb| init_mods: {
var mods = init_mods: {
if (self.x11_xkb) |x11_xkb| {
// Add any modifier state events from Xkb if we have them (X11 only).
if (x11_xkb.modifier_state_from_notify(display)) |xkb_mods| {
break :init_mods xkb_mods;
} else {
}
// Null back from the Xkb call means there was no modifier
// event to read. This likely means that the key event did not
// result in a modifier change and we can safely rely on the
// GDK state.
break :init_mods translateMods(c.gdk_device_get_modifier_state(device));
}
} else translateMods(c.gdk_device_get_modifier_state(device));
break :init_mods translateMods(c.gdk_device_get_modifier_state(device));
};
mods.num_lock = c.gdk_device_get_num_lock_state(device) == 1;

87
src/apprt/gtk/x11.zig
View File

@ -3,7 +3,7 @@ const std = @import("std");
const c = @import("c.zig");
const input = @import("../../input.zig");
const log = std.log.scoped(.gtk);
const log = std.log.scoped(.gtk_x11);
// X11 Function types. We load these dynamically at runtime to avoid having to
// link against X11.
@ -13,9 +13,11 @@ const XEventsQueuedType = *const fn (?*c.struct__XDisplay, c_int) callconv(.C) c
const XPeekEventType = *const fn (?*c.struct__XDisplay, [*c]c.union__XEvent) callconv(.C) c_int;
/// Returns true if the passed in display is an X11 display.
pub fn x11_is_display(display_: ?*c.GdkDisplay) bool {
const display = display_ orelse return false;
return (c.g_type_check_instance_is_a(@ptrCast(@alignCast(display)), c.gdk_x11_display_get_type()) != 0);
pub fn x11_is_display(display: ?*c.GdkDisplay) bool {
return c.g_type_check_instance_is_a(
@ptrCast(@alignCast(display orelse return false)),
c.gdk_x11_display_get_type(),
) != 0;
}
pub const X11Xkb = struct {
@ -29,47 +31,79 @@ pub const X11Xkb = struct {
XEventsQueued: XEventsQueuedType = undefined,
XPeekEvent: XPeekEventType = undefined,
pub fn init(display_: ?*c.GdkDisplay) !X11Xkb {
log.debug("X11: X11Xkb.init: initializing Xkb", .{});
const display = display_ orelse {
log.err("Fatal: error initializing Xkb extension: display is null", .{});
return error.XkbInitializationError;
};
/// Initialize an X11Xkb struct, for the given GDK display. If the display
/// isn't backed by X then this will return null.
pub fn init(display_: ?*c.GdkDisplay) !?X11Xkb {
// Display should never be null but we just treat that as a non-X11
// display so that the caller can just ignore it and not unwrap it.
const display = display_ orelse return null;
// If the display isn't X11, then we don't need to do anything.
if (!x11_is_display(display)) return null;
log.debug("X11Xkb.init: initializing Xkb", .{});
const xdisplay = c.gdk_x11_display_get_xdisplay(display);
var result: X11Xkb = .{ .opcode = 0, .base_event_code = 0, .base_error_code = 0 };
// Load in the X11 calls we need.
log.debug("X11: X11Xkb.init: loading libX11.so dynamically", .{});
log.debug(" X11Xkb.init: loading libX11.so dynamically", .{});
var libX11 = try std.DynLib.open("libX11.so");
defer libX11.close();
result.XkbQueryExtension = libX11.lookup(XkbQueryExtensionType, "XkbQueryExtension") orelse {
result.XkbQueryExtension = libX11.lookup(
XkbQueryExtensionType,
"XkbQueryExtension",
) orelse {
log.err("Fatal: error dynamic loading libX11: missing symbol XkbQueryExtension", .{});
return error.XkbInitializationError;
};
result.XkbSelectEventDetails = libX11.lookup(XkbSelectEventDetailsType, "XkbSelectEventDetails") orelse {
result.XkbSelectEventDetails = libX11.lookup(
XkbSelectEventDetailsType,
"XkbSelectEventDetails",
) orelse {
log.err("Fatal: error dynamic loading libX11: missing symbol XkbSelectEventDetails", .{});
return error.XkbInitializationError;
};
result.XEventsQueued = libX11.lookup(XEventsQueuedType, "XEventsQueued") orelse {
result.XEventsQueued = libX11.lookup(
XEventsQueuedType,
"XEventsQueued",
) orelse {
log.err("Fatal: error dynamic loading libX11: missing symbol XEventsQueued", .{});
return error.XkbInitializationError;
};
result.XPeekEvent = libX11.lookup(XPeekEventType, "XPeekEvent") orelse {
result.XPeekEvent = libX11.lookup(
XPeekEventType,
"XPeekEvent",
) orelse {
log.err("Fatal: error dynamic loading libX11: missing symbol XPeekEvent", .{});
return error.XkbInitializationError;
};
log.debug("X11: X11Xkb.init: running XkbQueryExtension", .{});
log.debug("X11Xkb.init: running XkbQueryExtension", .{});
var major = c.XkbMajorVersion;
var minor = c.XkbMinorVersion;
if (result.XkbQueryExtension(xdisplay, &result.opcode, &result.base_event_code, &result.base_error_code, &major, &minor) == 0) {
if (result.XkbQueryExtension(
xdisplay,
&result.opcode,
&result.base_event_code,
&result.base_error_code,
&major,
&minor,
) == 0) {
log.err("Fatal: error initializing Xkb extension: error executing XkbQueryExtension", .{});
return error.XkbInitializationError;
}
log.debug("X11: X11Xkb.init: running XkbSelectEventDetails", .{});
if (result.XkbSelectEventDetails(xdisplay, c.XkbUseCoreKbd, c.XkbStateNotify, c.XkbModifierStateMask, c.XkbModifierStateMask) == 0) {
log.debug("X11Xkb.init: running XkbSelectEventDetails", .{});
if (result.XkbSelectEventDetails(
xdisplay,
c.XkbUseCoreKbd,
c.XkbStateNotify,
c.XkbModifierStateMask,
c.XkbModifierStateMask,
) == 0) {
log.err("Fatal: error initializing Xkb extension: error executing XkbSelectEventDetails", .{});
return error.XkbInitializationError;
}
@ -89,15 +123,19 @@ pub const X11Xkb = struct {
/// event did not result in a modifier change).
pub fn modifier_state_from_notify(self: X11Xkb, display_: ?*c.GdkDisplay) ?input.Mods {
const display = display_ orelse return null;
// Shoutout to Mozilla for figuring out a clean way to do this, this is
// paraphrased from Firefox/Gecko in widget/gtk/nsGtkKeyUtils.cpp.
const xdisplay = c.gdk_x11_display_get_xdisplay(display);
if (self.XEventsQueued(xdisplay, c.QueuedAfterReading) != 0) {
if (self.XEventsQueued(xdisplay, c.QueuedAfterReading) == 0) return null;
var nextEvent: c.XEvent = undefined;
_ = self.XPeekEvent(xdisplay, &nextEvent);
if (nextEvent.type == self.base_event_code) {
if (nextEvent.type != self.base_event_code) return null;
const xkb_event: *c.XkbEvent = @ptrCast(&nextEvent);
if (xkb_event.any.xkb_type == c.XkbStateNotify) {
if (xkb_event.any.xkb_type != c.XkbStateNotify) return null;
const xkb_state_notify_event: *c.XkbStateNotifyEvent = @ptrCast(xkb_event);
// Check the state according to XKB masks.
const lookup_mods = xkb_state_notify_event.lookup_mods;
@ -112,9 +150,4 @@ pub const X11Xkb = struct {
return mods;
}
}
}
return null;
}
};