ghostty/src/apprt/embedded.zig
Mitchell Hashimoto df97c19a37 macOS: "option-as-alt" defaults to "true" for US keyboard layouts
A common issue for US-centric users of a terminal is that the "option"
key on macOS is not treated as the "alt" key in the terminal.

## Background

macOS does not have an "alt" key, but instead has an "option" key. The "option"
key is used for a variety of purposes, but the troublesome behavior for some
(and expected/desired behavior for others) is that it is used to input special
characters.

For example, on a US standard layout, `option-b` inputs `∫`. This is not
a typically desired character when using a terminal and most users will
instead expect that `option-b` maps to `alt-b` for keybinding purposes
with whatever shell, TUI, editor, etc. they're using.

On non-US layouts, the "option" key is a critical modifier key for
inputting certain characters in the same way "shift" is a critical
modifier key for inputting certain characters on US layouts.

We previously tried to change the default for `macos-option-as-alt`
to `left` (so that the left option key behaves as alt) because I had the
wrong assumption that international users always used the right option
key with terminals or were used to this. But very quickly beta users
with different layouts (such as German, I believe) noted that this is
not the case and broke their idiomatic input behavior. This behavior was
therefore reverted.

## Solution

This confusing behavior happened frequently enough that I decided to
implement the more complex behavior in this commit. The new behavior is
that when a US layout is active, `macos-option-as-alt` defaults to true
if it is unset. When a non-US layout is active, `macos-option-as-alt`
defaults to false if it is unset. This happens live as users change
their keyboard layout.

**An important goal of Ghostty is to have zero-config defaults** that
satisfy the majority of users. Fiddling with configurations is -- for
most -- an annoying task and software that works well enough out of the
box is delightful. Based on surveying beta users, I believe this commit
will result in less configuration for the majority of users.

## Other Terminals

This behavior is unique amongst terminals as far as I know.
Terminal.app, Kitty, iTerm2, Alacritty (I stopped checking there) all
default to the default macOS behavior (option is option and special
characters are inputted).

All of the aforementioned terminals have a setting to change this
behavior, identical to Ghostty (or, Ghostty identical to them perhaps
since they all predate Ghostty).

I couldn't find any history where users requested the behavior of
defaulting this to something else for US based keyboards. That's
interesting since this has come up so frequently during the Ghostty
beta!
2024-12-11 10:27:08 -08:00

2066 lines
68 KiB
Zig

//! Application runtime for the embedded version of Ghostty. The embedded
//! version is when Ghostty is embedded within a parent host application,
//! rather than owning the application lifecycle itself. This is used for
//! example for the macOS build of Ghostty so that we can use a native
//! Swift+XCode-based application.
const std = @import("std");
const builtin = @import("builtin");
const assert = std.debug.assert;
const Allocator = std.mem.Allocator;
const objc = @import("objc");
const apprt = @import("../apprt.zig");
const font = @import("../font/main.zig");
const input = @import("../input.zig");
const renderer = @import("../renderer.zig");
const terminal = @import("../terminal/main.zig");
const CoreApp = @import("../App.zig");
const CoreInspector = @import("../inspector/main.zig").Inspector;
const CoreSurface = @import("../Surface.zig");
const configpkg = @import("../config.zig");
const Config = configpkg.Config;
const log = std.log.scoped(.embedded_window);
pub const App = struct {
/// Because we only expect the embedding API to be used in embedded
/// environments, the options are extern so that we can expose it
/// directly to a C callconv and not pay for any translation costs.
///
/// C type: ghostty_runtime_config_s
pub const Options = extern struct {
/// These are just aliases to make the function signatures below
/// more obvious what values will be sent.
const AppUD = ?*anyopaque;
const SurfaceUD = ?*anyopaque;
/// Userdata that is passed to all the callbacks.
userdata: AppUD = null,
/// True if the selection clipboard is supported.
supports_selection_clipboard: bool = false,
/// Callback called to wakeup the event loop. This should trigger
/// a full tick of the app loop.
wakeup: *const fn (AppUD) callconv(.C) void,
/// Callback called to handle an action.
action: *const fn (*App, apprt.Target.C, apprt.Action.C) callconv(.C) void,
/// Read the clipboard value. The return value must be preserved
/// by the host until the next call. If there is no valid clipboard
/// value then this should return null.
read_clipboard: *const fn (SurfaceUD, c_int, *apprt.ClipboardRequest) callconv(.C) void,
/// This may be called after a read clipboard call to request
/// confirmation that the clipboard value is safe to read. The embedder
/// must call complete_clipboard_request with the given request.
confirm_read_clipboard: *const fn (
SurfaceUD,
[*:0]const u8,
*apprt.ClipboardRequest,
apprt.ClipboardRequestType,
) callconv(.C) void,
/// Write the clipboard value.
write_clipboard: *const fn (SurfaceUD, [*:0]const u8, c_int, bool) callconv(.C) void,
/// Close the current surface given by this function.
close_surface: ?*const fn (SurfaceUD, bool) callconv(.C) void = null,
};
/// This is the key event sent for ghostty_surface_key and
/// ghostty_app_key.
pub const KeyEvent = struct {
/// The three below are absolutely required.
action: input.Action,
mods: input.Mods,
keycode: u32,
/// Optionally, the embedder can handle text translation and send
/// the text value here. If text is non-nil, it is assumed that the
/// embedder also handles dead key states and sets composing as necessary.
text: ?[:0]const u8,
composing: bool,
};
core_app: *CoreApp,
opts: Options,
keymap: input.Keymap,
/// The configuration for the app. This is owned by this structure.
config: Config,
/// The keymap state is used for global keybinds only. Each surface
/// also has its own keymap state for focused keybinds.
keymap_state: input.Keymap.State,
pub fn init(
core_app: *CoreApp,
config: *const Config,
opts: Options,
) !App {
// We have to clone the config.
const alloc = core_app.alloc;
var config_clone = try config.clone(alloc);
errdefer config_clone.deinit();
var keymap = try input.Keymap.init();
errdefer keymap.deinit();
return .{
.core_app = core_app,
.config = config_clone,
.opts = opts,
.keymap = keymap,
.keymap_state = .{},
};
}
pub fn terminate(self: *App) void {
self.keymap.deinit();
self.config.deinit();
}
/// Returns true if there are any global keybinds in the configuration.
pub fn hasGlobalKeybinds(self: *const App) bool {
var it = self.config.keybind.set.bindings.iterator();
while (it.next()) |entry| {
switch (entry.value_ptr.*) {
.leader => {},
.leaf => |leaf| if (leaf.flags.global) return true,
}
}
return false;
}
/// The target of a key event. This is used to determine some subtly
/// different behavior between app and surface key events.
pub const KeyTarget = union(enum) {
app,
surface: *Surface,
};
/// See CoreApp.focusEvent
pub fn focusEvent(self: *App, focused: bool) void {
self.core_app.focusEvent(focused);
}
/// See CoreApp.keyEvent.
pub fn keyEvent(
self: *App,
target: KeyTarget,
event: KeyEvent,
) !bool {
const action = event.action;
const keycode = event.keycode;
const mods = event.mods;
// True if this is a key down event
const is_down = action == .press or action == .repeat;
// If we're on macOS and we have macos-option-as-alt enabled,
// then we strip the alt modifier from the mods for translation.
const translate_mods = translate_mods: {
var translate_mods = mods;
if ((comptime builtin.target.isDarwin()) and translate_mods.alt) {
// Note: the keyboardLayout() function is not super cheap
// so we only want to run it if alt is already pressed hence
// the above condition.
const option_as_alt: configpkg.OptionAsAlt =
self.config.@"macos-option-as-alt" orelse
self.keyboardLayout().detectOptionAsAlt();
const strip = switch (option_as_alt) {
.false => false,
.true => mods.alt,
.left => mods.sides.alt == .left,
.right => mods.sides.alt == .right,
};
if (strip) translate_mods.alt = false;
}
// On macOS we strip ctrl because UCKeyTranslate
// converts to the masked values (i.e. ctrl+c becomes 3)
// and we don't want that behavior.
//
// We also strip super because its not used for translation
// on macos and it results in a bad translation.
if (comptime builtin.target.isDarwin()) {
translate_mods.ctrl = false;
translate_mods.super = false;
}
break :translate_mods translate_mods;
};
const event_text: ?[]const u8 = event_text: {
// This logic only applies to macOS.
if (comptime builtin.os.tag != .macos) break :event_text event.text;
// If the modifiers are ONLY "control" then we never process
// the event text because we want to do our own translation so
// we can handle ctrl+c, ctrl+z, etc.
//
// This is specifically because on macOS using the
// "Dvorak - QWERTY ⌘" keyboard layout, ctrl+z is translated as
// "/" (the physical key that is z on a qwerty keyboard). But on
// other layouts, ctrl+<char> is not translated by AppKit. So,
// we just avoid this by never allowing AppKit to translate
// ctrl+<char> and instead do it ourselves.
const ctrl_only = comptime (input.Mods{ .ctrl = true }).int();
break :event_text if (mods.binding().int() == ctrl_only) null else event.text;
};
// Translate our key using the keymap for our localized keyboard layout.
// We only translate for keydown events. Otherwise, we only care about
// the raw keycode.
var buf: [128]u8 = undefined;
const result: input.Keymap.Translation = if (is_down) translate: {
// If the event provided us with text, then we use this as a result
// and do not do manual translation.
const result: input.Keymap.Translation = if (event_text) |text| .{
.text = text,
.composing = event.composing,
} else try self.keymap.translate(
&buf,
switch (target) {
.app => &self.keymap_state,
.surface => |surface| &surface.keymap_state,
},
@intCast(keycode),
translate_mods,
);
// If this is a dead key, then we're composing a character and
// we need to set our proper preedit state if we're targeting a
// surface.
if (result.composing) {
switch (target) {
.app => {},
.surface => |surface| surface.core_surface.preeditCallback(
result.text,
) catch |err| {
log.err("error in preedit callback err={}", .{err});
return false;
},
}
} else {
switch (target) {
.app => {},
.surface => |surface| surface.core_surface.preeditCallback(null) catch |err| {
log.err("error in preedit callback err={}", .{err});
return false;
},
}
// If the text is just a single non-printable ASCII character
// then we clear the text. We handle non-printables in the
// key encoder manual (such as tab, ctrl+c, etc.)
if (result.text.len == 1 and result.text[0] < 0x20) {
break :translate .{ .composing = false, .text = "" };
}
}
break :translate result;
} else .{ .composing = false, .text = "" };
// UCKeyTranslate always consumes all mods, so if we have any output
// then we've consumed our translate mods.
const consumed_mods: input.Mods = if (result.text.len > 0) translate_mods else .{};
// We need to always do a translation with no modifiers at all in
// order to get the "unshifted_codepoint" for the key event.
const unshifted_codepoint: u21 = unshifted: {
var nomod_buf: [128]u8 = undefined;
var nomod_state: input.Keymap.State = .{};
const nomod = try self.keymap.translate(
&nomod_buf,
&nomod_state,
@intCast(keycode),
.{},
);
const view = std.unicode.Utf8View.init(nomod.text) catch |err| {
log.warn("cannot build utf8 view over text: {}", .{err});
break :unshifted 0;
};
var it = view.iterator();
break :unshifted it.nextCodepoint() orelse 0;
};
// log.warn("TRANSLATE: action={} keycode={x} dead={} key_len={} key={any} key_str={s} mods={}", .{
// action,
// keycode,
// result.composing,
// result.text.len,
// result.text,
// result.text,
// mods,
// });
// We want to get the physical unmapped key to process keybinds.
const physical_key = keycode: for (input.keycodes.entries) |entry| {
if (entry.native == keycode) break :keycode entry.key;
} else .invalid;
// If the resulting text has length 1 then we can take its key
// and attempt to translate it to a key enum and call the key callback.
// If the length is greater than 1 then we're going to call the
// charCallback.
//
// We also only do key translation if this is not a dead key.
const key = if (!result.composing) key: {
// If our physical key is a keypad key, we use that.
if (physical_key.keypad()) break :key physical_key;
// A completed key. If the length of the key is one then we can
// attempt to translate it to a key enum and call the key
// callback. First try plain ASCII.
if (result.text.len > 0) {
if (input.Key.fromASCII(result.text[0])) |key| {
break :key key;
}
}
// If the above doesn't work, we use the unmodified value.
if (std.math.cast(u8, unshifted_codepoint)) |ascii| {
if (input.Key.fromASCII(ascii)) |key| {
break :key key;
}
}
break :key physical_key;
} else .invalid;
// Build our final key event
const input_event: input.KeyEvent = .{
.action = action,
.key = key,
.physical_key = physical_key,
.mods = mods,
.consumed_mods = consumed_mods,
.composing = result.composing,
.utf8 = result.text,
.unshifted_codepoint = unshifted_codepoint,
};
// Invoke the core Ghostty logic to handle this input.
const effect: CoreSurface.InputEffect = switch (target) {
.app => if (self.core_app.keyEvent(
self,
input_event,
))
.consumed
else
.ignored,
.surface => |surface| try surface.core_surface.keyCallback(input_event),
};
return switch (effect) {
.closed => true,
.ignored => false,
.consumed => consumed: {
if (is_down) {
// If we consume the key then we want to reset the dead
// key state.
self.keymap_state = .{};
switch (target) {
.app => {},
.surface => |surface| surface.core_surface.preeditCallback(null) catch {},
}
}
break :consumed true;
},
};
}
/// This should be called whenever the keyboard layout was changed.
pub fn reloadKeymap(self: *App) !void {
// Reload the keymap
try self.keymap.reload();
// Clear the dead key state since we changed the keymap, any
// dead key state is just forgotten. i.e. if you type ' on us-intl
// and then switch to us and type a, you'll get a rather than á.
for (self.core_app.surfaces.items) |surface| {
surface.keymap_state = .{};
}
}
/// Loads the keyboard layout.
///
/// Kind of expensive so this should be avoided if possible. When I say
/// "kind of expensive" I mean that its not something you probably want
/// to run on every keypress.
pub fn keyboardLayout(self: *const App) input.KeyboardLayout {
// We only support keyboard layout detection on macOS.
if (comptime builtin.os.tag != .macos) return .unknown;
// Any layout larger than this is not something we can handle.
var buf: [256]u8 = undefined;
const id = self.keymap.sourceId(&buf) catch |err| {
comptime assert(@TypeOf(err) == error{OutOfMemory});
return .unknown;
};
return input.KeyboardLayout.mapAppleId(id) orelse .unknown;
}
pub fn wakeup(self: *const App) void {
self.opts.wakeup(self.opts.userdata);
}
pub fn wait(self: *const App) !void {
_ = self;
}
/// Create a new surface for the app.
fn newSurface(self: *App, opts: Surface.Options) !*Surface {
// Grab a surface allocation because we're going to need it.
var surface = try self.core_app.alloc.create(Surface);
errdefer self.core_app.alloc.destroy(surface);
// Create the surface -- because windows are surfaces for glfw.
try surface.init(self, opts);
errdefer surface.deinit();
return surface;
}
/// Close the given surface.
pub fn closeSurface(self: *App, surface: *Surface) void {
surface.deinit();
self.core_app.alloc.destroy(surface);
}
pub fn redrawSurface(self: *App, surface: *Surface) void {
_ = self;
_ = surface;
// No-op, we use a threaded interface so we're constantly drawing.
}
pub fn redrawInspector(self: *App, surface: *Surface) void {
_ = self;
surface.queueInspectorRender();
}
/// Perform a given action.
pub fn performAction(
self: *App,
target: apprt.Target,
comptime action: apprt.Action.Key,
value: apprt.Action.Value(action),
) !void {
// Special case certain actions before they are sent to the
// embedded apprt.
self.performPreAction(target, action, value);
log.debug("dispatching action target={s} action={} value={}", .{
@tagName(target),
action,
value,
});
self.opts.action(
self,
target.cval(),
@unionInit(apprt.Action, @tagName(action), value).cval(),
);
}
fn performPreAction(
self: *App,
target: apprt.Target,
comptime action: apprt.Action.Key,
value: apprt.Action.Value(action),
) void {
// Special case certain actions before they are sent to the embedder
switch (action) {
.set_title => switch (target) {
.app => {},
.surface => |surface| {
// Dupe the title so that we can store it. If we get an allocation
// error we just ignore it, since this only breaks a few minor things.
const alloc = self.core_app.alloc;
if (surface.rt_surface.title) |v| alloc.free(v);
surface.rt_surface.title = alloc.dupeZ(u8, value.title) catch null;
},
},
.config_change => switch (target) {
.surface => {},
// For app updates, we update our core config. We need to
// clone it because the caller owns the param.
.app => if (value.config.clone(self.core_app.alloc)) |config| {
self.config.deinit();
self.config = config;
} else |err| {
log.err("error updating app config err={}", .{err});
},
},
else => {},
}
}
};
/// Platform-specific configuration for libghostty.
pub const Platform = union(PlatformTag) {
macos: MacOS,
ios: IOS,
// If our build target for libghostty is not darwin then we do
// not include macos support at all.
pub const MacOS = if (builtin.target.isDarwin()) struct {
/// The view to render the surface on.
nsview: objc.Object,
} else void;
pub const IOS = if (builtin.target.isDarwin()) struct {
/// The view to render the surface on.
uiview: objc.Object,
} else void;
// The C ABI compatible version of this union. The tag is expected
// to be stored elsewhere.
pub const C = extern union {
macos: extern struct {
nsview: ?*anyopaque,
},
ios: extern struct {
uiview: ?*anyopaque,
},
};
/// Initialize a Platform a tag and configuration from the C ABI.
pub fn init(tag_int: c_int, c_platform: C) !Platform {
const tag = try std.meta.intToEnum(PlatformTag, tag_int);
return switch (tag) {
.macos => if (MacOS != void) macos: {
const config = c_platform.macos;
const nsview = objc.Object.fromId(config.nsview orelse
break :macos error.NSViewMustBeSet);
break :macos .{ .macos = .{ .nsview = nsview } };
} else error.UnsupportedPlatform,
.ios => if (IOS != void) ios: {
const config = c_platform.ios;
const uiview = objc.Object.fromId(config.uiview orelse
break :ios error.UIViewMustBeSet);
break :ios .{ .ios = .{ .uiview = uiview } };
} else error.UnsupportedPlatform,
};
}
};
pub const PlatformTag = enum(c_int) {
// "0" is reserved for invalid so we can detect unset values
// from the C API.
macos = 1,
ios = 2,
};
pub const Surface = struct {
app: *App,
platform: Platform,
userdata: ?*anyopaque = null,
core_surface: CoreSurface,
content_scale: apprt.ContentScale,
size: apprt.SurfaceSize,
cursor_pos: apprt.CursorPos,
keymap_state: input.Keymap.State,
inspector: ?*Inspector = null,
/// The current title of the surface. The embedded apprt saves this so
/// that getTitle works without the implementer needing to save it.
title: ?[:0]const u8 = null,
/// Surface initialization options.
pub const Options = extern struct {
/// The platform that this surface is being initialized for and
/// the associated platform-specific configuration.
platform_tag: c_int = 0,
platform: Platform.C = undefined,
/// Userdata passed to some of the callbacks.
userdata: ?*anyopaque = null,
/// The scale factor of the screen.
scale_factor: f64 = 1,
/// The font size to inherit. If 0, default font size will be used.
font_size: f32 = 0,
/// The working directory to load into.
working_directory: [*:0]const u8 = "",
/// The command to run in the new surface. If this is set then
/// the "wait-after-command" option is also automatically set to true,
/// since this is used for scripting.
command: [*:0]const u8 = "",
};
pub fn init(self: *Surface, app: *App, opts: Options) !void {
self.* = .{
.app = app,
.platform = try Platform.init(opts.platform_tag, opts.platform),
.userdata = opts.userdata,
.core_surface = undefined,
.content_scale = .{
.x = @floatCast(opts.scale_factor),
.y = @floatCast(opts.scale_factor),
},
.size = .{ .width = 800, .height = 600 },
.cursor_pos = .{ .x = 0, .y = 0 },
.keymap_state = .{},
};
// Add ourselves to the list of surfaces on the app.
try app.core_app.addSurface(self);
errdefer app.core_app.deleteSurface(self);
// Shallow copy the config so that we can modify it.
var config = try apprt.surface.newConfig(app.core_app, &app.config);
defer config.deinit();
// If we have a working directory from the options then we set it.
const wd = std.mem.sliceTo(opts.working_directory, 0);
if (wd.len > 0) wd: {
var dir = std.fs.openDirAbsolute(wd, .{}) catch |err| {
log.warn(
"error opening requested working directory dir={s} err={}",
.{ wd, err },
);
break :wd;
};
defer dir.close();
const stat = dir.stat() catch |err| {
log.warn(
"failed to stat requested working directory dir={s} err={}",
.{ wd, err },
);
break :wd;
};
if (stat.kind != .directory) {
log.warn(
"requested working directory is not a directory dir={s}",
.{wd},
);
break :wd;
}
config.@"working-directory" = wd;
}
// If we have a command from the options then we set it.
const cmd = std.mem.sliceTo(opts.command, 0);
if (cmd.len > 0) {
config.command = cmd;
config.@"wait-after-command" = true;
}
// Initialize our surface right away. We're given a view that is
// ready to use.
try self.core_surface.init(
app.core_app.alloc,
&config,
app.core_app,
app,
self,
);
errdefer self.core_surface.deinit();
// If our options requested a specific font-size, set that.
if (opts.font_size != 0) {
var font_size = self.core_surface.font_size;
font_size.points = opts.font_size;
try self.core_surface.setFontSize(font_size);
}
}
pub fn deinit(self: *Surface) void {
// Shut down our inspector
self.freeInspector();
// Free our title
if (self.title) |v| self.app.core_app.alloc.free(v);
// Remove ourselves from the list of known surfaces in the app.
self.app.core_app.deleteSurface(self);
// Clean up our core surface so that all the rendering and IO stop.
self.core_surface.deinit();
}
/// Initialize the inspector instance. A surface can only have one
/// inspector at any given time, so this will return the previous inspector
/// if it was already initialized.
pub fn initInspector(self: *Surface) !*Inspector {
if (self.inspector) |v| return v;
const alloc = self.app.core_app.alloc;
const inspector = try alloc.create(Inspector);
errdefer alloc.destroy(inspector);
inspector.* = try Inspector.init(self);
self.inspector = inspector;
return inspector;
}
pub fn freeInspector(self: *Surface) void {
if (self.inspector) |v| {
v.deinit();
self.app.core_app.alloc.destroy(v);
self.inspector = null;
}
}
pub fn close(self: *const Surface, process_alive: bool) void {
const func = self.app.opts.close_surface orelse {
log.info("runtime embedder does not support closing a surface", .{});
return;
};
func(self.userdata, process_alive);
}
pub fn getContentScale(self: *const Surface) !apprt.ContentScale {
return self.content_scale;
}
pub fn getSize(self: *const Surface) !apprt.SurfaceSize {
return self.size;
}
pub fn getTitle(self: *Surface) ?[:0]const u8 {
return self.title;
}
pub fn supportsClipboard(
self: *const Surface,
clipboard_type: apprt.Clipboard,
) bool {
return switch (clipboard_type) {
.standard => true,
.selection, .primary => self.app.opts.supports_selection_clipboard,
};
}
pub fn clipboardRequest(
self: *Surface,
clipboard_type: apprt.Clipboard,
state: apprt.ClipboardRequest,
) !void {
// We need to allocate to get a pointer to store our clipboard request
// so that it is stable until the read_clipboard callback and call
// complete_clipboard_request. This sucks but clipboard requests aren't
// high throughput so it's probably fine.
const alloc = self.app.core_app.alloc;
const state_ptr = try alloc.create(apprt.ClipboardRequest);
errdefer alloc.destroy(state_ptr);
state_ptr.* = state;
self.app.opts.read_clipboard(
self.userdata,
@intCast(@intFromEnum(clipboard_type)),
state_ptr,
);
}
fn completeClipboardRequest(
self: *Surface,
str: [:0]const u8,
state: *apprt.ClipboardRequest,
confirmed: bool,
) void {
const alloc = self.app.core_app.alloc;
// Attempt to complete the request, but we may request
// confirmation.
self.core_surface.completeClipboardRequest(
state.*,
str,
confirmed,
) catch |err| switch (err) {
error.UnsafePaste,
error.UnauthorizedPaste,
=> {
self.app.opts.confirm_read_clipboard(
self.userdata,
str.ptr,
state,
state.*,
);
return;
},
else => log.err("error completing clipboard request err={}", .{err}),
};
// We don't defer this because the clipboard confirmation route
// preserves the clipboard request.
alloc.destroy(state);
}
pub fn setClipboardString(
self: *const Surface,
val: [:0]const u8,
clipboard_type: apprt.Clipboard,
confirm: bool,
) !void {
self.app.opts.write_clipboard(
self.userdata,
val.ptr,
@intCast(@intFromEnum(clipboard_type)),
confirm,
);
}
pub fn setShouldClose(self: *Surface) void {
_ = self;
}
pub fn shouldClose(self: *const Surface) bool {
_ = self;
return false;
}
pub fn getCursorPos(self: *const Surface) !apprt.CursorPos {
return self.cursor_pos;
}
pub fn refresh(self: *Surface) void {
self.core_surface.refreshCallback() catch |err| {
log.err("error in refresh callback err={}", .{err});
return;
};
}
pub fn draw(self: *Surface) void {
self.core_surface.draw() catch |err| {
log.err("error in draw err={}", .{err});
return;
};
}
pub fn updateContentScale(self: *Surface, x: f64, y: f64) void {
// We are an embedded API so the caller can send us all sorts of
// garbage. We want to make sure that the float values are valid
// and we don't want to support fractional scaling below 1.
const x_scaled = @max(1, if (std.math.isNan(x)) 1 else x);
const y_scaled = @max(1, if (std.math.isNan(y)) 1 else y);
self.content_scale = .{
.x = @floatCast(x_scaled),
.y = @floatCast(y_scaled),
};
self.core_surface.contentScaleCallback(self.content_scale) catch |err| {
log.err("error in content scale callback err={}", .{err});
return;
};
}
pub fn updateSize(self: *Surface, width: u32, height: u32) void {
// Runtimes sometimes generate superfluous resize events even
// if the size did not actually change (SwiftUI). We check
// that the size actually changed from what we last recorded
// since resizes are expensive.
if (self.size.width == width and self.size.height == height) return;
self.size = .{
.width = width,
.height = height,
};
// Call the primary callback.
self.core_surface.sizeCallback(self.size) catch |err| {
log.err("error in size callback err={}", .{err});
return;
};
}
pub fn colorSchemeCallback(self: *Surface, scheme: apprt.ColorScheme) void {
self.core_surface.colorSchemeCallback(scheme) catch |err| {
log.err("error setting color scheme err={}", .{err});
return;
};
}
pub fn mouseButtonCallback(
self: *Surface,
action: input.MouseButtonState,
button: input.MouseButton,
mods: input.Mods,
) bool {
return self.core_surface.mouseButtonCallback(action, button, mods) catch |err| {
log.err("error in mouse button callback err={}", .{err});
return false;
};
}
pub fn mousePressureCallback(
self: *Surface,
stage: input.MousePressureStage,
pressure: f64,
) void {
self.core_surface.mousePressureCallback(stage, pressure) catch |err| {
log.err("error in mouse pressure callback err={}", .{err});
return;
};
}
pub fn scrollCallback(
self: *Surface,
xoff: f64,
yoff: f64,
mods: input.ScrollMods,
) void {
self.core_surface.scrollCallback(xoff, yoff, mods) catch |err| {
log.err("error in scroll callback err={}", .{err});
return;
};
}
pub fn cursorPosCallback(
self: *Surface,
x: f64,
y: f64,
mods: input.Mods,
) void {
// Convert our unscaled x/y to scaled.
self.cursor_pos = self.cursorPosToPixels(.{
.x = @floatCast(x),
.y = @floatCast(y),
}) catch |err| {
log.err(
"error converting cursor pos to scaled pixels in cursor pos callback err={}",
.{err},
);
return;
};
self.core_surface.cursorPosCallback(self.cursor_pos, mods) catch |err| {
log.err("error in cursor pos callback err={}", .{err});
return;
};
}
pub fn textCallback(self: *Surface, text: []const u8) void {
_ = self.core_surface.textCallback(text) catch |err| {
log.err("error in key callback err={}", .{err});
return;
};
}
pub fn focusCallback(self: *Surface, focused: bool) void {
self.core_surface.focusCallback(focused) catch |err| {
log.err("error in focus callback err={}", .{err});
return;
};
}
pub fn occlusionCallback(self: *Surface, visible: bool) void {
self.core_surface.occlusionCallback(visible) catch |err| {
log.err("error in occlusion callback err={}", .{err});
return;
};
}
fn queueInspectorRender(self: *Surface) void {
self.app.performAction(
.{ .surface = &self.core_surface },
.render_inspector,
{},
) catch |err| {
log.err("error rendering the inspector err={}", .{err});
return;
};
}
pub fn newSurfaceOptions(self: *const Surface) apprt.Surface.Options {
const font_size: f32 = font_size: {
if (!self.app.config.@"window-inherit-font-size") break :font_size 0;
break :font_size self.core_surface.font_size.points;
};
return .{
.font_size = font_size,
};
}
/// The cursor position from the host directly is in screen coordinates but
/// all our interface works in pixels.
fn cursorPosToPixels(self: *const Surface, pos: apprt.CursorPos) !apprt.CursorPos {
const scale = try self.getContentScale();
return .{ .x = pos.x * scale.x, .y = pos.y * scale.y };
}
};
/// Inspector is the state required for the terminal inspector. A terminal
/// inspector is 1:1 with a Surface.
pub const Inspector = struct {
const cimgui = @import("cimgui");
surface: *Surface,
ig_ctx: *cimgui.c.ImGuiContext,
backend: ?Backend = null,
keymap_state: input.Keymap.State = .{},
content_scale: f64 = 1,
/// Our previous instant used to calculate delta time for animations.
instant: ?std.time.Instant = null,
const Backend = enum {
metal,
pub fn deinit(self: Backend) void {
switch (self) {
.metal => if (builtin.target.isDarwin()) cimgui.ImGui_ImplMetal_Shutdown(),
}
}
};
pub fn init(surface: *Surface) !Inspector {
const ig_ctx = cimgui.c.igCreateContext(null) orelse return error.OutOfMemory;
errdefer cimgui.c.igDestroyContext(ig_ctx);
cimgui.c.igSetCurrentContext(ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
io.BackendPlatformName = "ghostty_embedded";
// Setup our core inspector
CoreInspector.setup();
surface.core_surface.activateInspector() catch |err| {
log.err("failed to activate inspector err={}", .{err});
};
return .{
.surface = surface,
.ig_ctx = ig_ctx,
};
}
pub fn deinit(self: *Inspector) void {
self.surface.core_surface.deactivateInspector();
cimgui.c.igSetCurrentContext(self.ig_ctx);
if (self.backend) |v| v.deinit();
cimgui.c.igDestroyContext(self.ig_ctx);
}
/// Queue a render for the next frame.
pub fn queueRender(self: *Inspector) void {
self.surface.queueInspectorRender();
}
/// Initialize the inspector for a metal backend.
pub fn initMetal(self: *Inspector, device: objc.Object) bool {
defer device.msgSend(void, objc.sel("release"), .{});
cimgui.c.igSetCurrentContext(self.ig_ctx);
if (self.backend) |v| {
v.deinit();
self.backend = null;
}
if (!cimgui.ImGui_ImplMetal_Init(device.value)) {
log.warn("failed to initialize metal backend", .{});
return false;
}
self.backend = .metal;
log.debug("initialized metal backend", .{});
return true;
}
pub fn renderMetal(
self: *Inspector,
command_buffer: objc.Object,
desc: objc.Object,
) !void {
defer {
command_buffer.msgSend(void, objc.sel("release"), .{});
desc.msgSend(void, objc.sel("release"), .{});
}
assert(self.backend == .metal);
//log.debug("render", .{});
// Setup our imgui frame. We need to render multiple frames to ensure
// ImGui completes all its state processing. I don't know how to fix
// this.
for (0..2) |_| {
cimgui.ImGui_ImplMetal_NewFrame(desc.value);
try self.newFrame();
cimgui.c.igNewFrame();
// Build our UI
render: {
const surface = &self.surface.core_surface;
const inspector = surface.inspector orelse break :render;
inspector.render();
}
// Render
cimgui.c.igRender();
}
// MTLRenderCommandEncoder
const encoder = command_buffer.msgSend(
objc.Object,
objc.sel("renderCommandEncoderWithDescriptor:"),
.{desc.value},
);
defer encoder.msgSend(void, objc.sel("endEncoding"), .{});
cimgui.ImGui_ImplMetal_RenderDrawData(
cimgui.c.igGetDrawData(),
command_buffer.value,
encoder.value,
);
}
pub fn updateContentScale(self: *Inspector, x: f64, y: f64) void {
_ = y;
cimgui.c.igSetCurrentContext(self.ig_ctx);
// Cache our scale because we use it for cursor position calculations.
self.content_scale = x;
// Setup a new style and scale it appropriately.
const style = cimgui.c.ImGuiStyle_ImGuiStyle();
defer cimgui.c.ImGuiStyle_destroy(style);
cimgui.c.ImGuiStyle_ScaleAllSizes(style, @floatCast(x));
const active_style = cimgui.c.igGetStyle();
active_style.* = style.*;
}
pub fn updateSize(self: *Inspector, width: u32, height: u32) void {
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
io.DisplaySize = .{ .x = @floatFromInt(width), .y = @floatFromInt(height) };
}
pub fn mouseButtonCallback(
self: *Inspector,
action: input.MouseButtonState,
button: input.MouseButton,
mods: input.Mods,
) void {
_ = mods;
self.queueRender();
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
const imgui_button = switch (button) {
.left => cimgui.c.ImGuiMouseButton_Left,
.middle => cimgui.c.ImGuiMouseButton_Middle,
.right => cimgui.c.ImGuiMouseButton_Right,
else => return, // unsupported
};
cimgui.c.ImGuiIO_AddMouseButtonEvent(io, imgui_button, action == .press);
}
pub fn scrollCallback(
self: *Inspector,
xoff: f64,
yoff: f64,
mods: input.ScrollMods,
) void {
_ = mods;
self.queueRender();
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
cimgui.c.ImGuiIO_AddMouseWheelEvent(
io,
@floatCast(xoff),
@floatCast(yoff),
);
}
pub fn cursorPosCallback(self: *Inspector, x: f64, y: f64) void {
self.queueRender();
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
cimgui.c.ImGuiIO_AddMousePosEvent(
io,
@floatCast(x * self.content_scale),
@floatCast(y * self.content_scale),
);
}
pub fn focusCallback(self: *Inspector, focused: bool) void {
self.queueRender();
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
cimgui.c.ImGuiIO_AddFocusEvent(io, focused);
}
pub fn textCallback(self: *Inspector, text: [:0]const u8) void {
self.queueRender();
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
cimgui.c.ImGuiIO_AddInputCharactersUTF8(io, text.ptr);
}
pub fn keyCallback(
self: *Inspector,
action: input.Action,
key: input.Key,
mods: input.Mods,
) !void {
self.queueRender();
cimgui.c.igSetCurrentContext(self.ig_ctx);
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
// Update all our modifiers
cimgui.c.ImGuiIO_AddKeyEvent(io, cimgui.c.ImGuiKey_LeftShift, mods.shift);
cimgui.c.ImGuiIO_AddKeyEvent(io, cimgui.c.ImGuiKey_LeftCtrl, mods.ctrl);
cimgui.c.ImGuiIO_AddKeyEvent(io, cimgui.c.ImGuiKey_LeftAlt, mods.alt);
cimgui.c.ImGuiIO_AddKeyEvent(io, cimgui.c.ImGuiKey_LeftSuper, mods.super);
// Send our keypress
if (key.imguiKey()) |imgui_key| {
cimgui.c.ImGuiIO_AddKeyEvent(
io,
imgui_key,
action == .press or action == .repeat,
);
}
}
fn newFrame(self: *Inspector) !void {
const io: *cimgui.c.ImGuiIO = cimgui.c.igGetIO();
// Determine our delta time
const now = try std.time.Instant.now();
io.DeltaTime = if (self.instant) |prev| delta: {
const since_ns = now.since(prev);
const since_s: f32 = @floatFromInt(since_ns / std.time.ns_per_s);
break :delta @max(0.00001, since_s);
} else (1 / 60);
self.instant = now;
}
};
// C API
pub const CAPI = struct {
const global = &@import("../global.zig").state;
/// This is the same as Surface.KeyEvent but this is the raw C API version.
const KeyEvent = extern struct {
action: input.Action,
mods: c_int,
keycode: u32,
text: ?[*:0]const u8,
composing: bool,
/// Convert to surface key event.
fn keyEvent(self: KeyEvent) App.KeyEvent {
return .{
.action = self.action,
.mods = @bitCast(@as(
input.Mods.Backing,
@truncate(@as(c_uint, @bitCast(self.mods))),
)),
.keycode = self.keycode,
.text = if (self.text) |ptr| std.mem.sliceTo(ptr, 0) else null,
.composing = self.composing,
};
}
};
const Selection = extern struct {
tl_x_px: f64,
tl_y_px: f64,
offset_start: u32,
offset_len: u32,
};
const SurfaceSize = extern struct {
columns: u16,
rows: u16,
width_px: u32,
height_px: u32,
cell_width_px: u32,
cell_height_px: u32,
};
// Reference the conditional exports based on target platform
// so they're included in the C API.
comptime {
if (builtin.target.isDarwin()) {
_ = Darwin;
}
}
/// Create a new app.
export fn ghostty_app_new(
opts: *const apprt.runtime.App.Options,
config: *const Config,
) ?*App {
return app_new_(opts, config) catch |err| {
log.err("error initializing app err={}", .{err});
return null;
};
}
fn app_new_(
opts: *const apprt.runtime.App.Options,
config: *const Config,
) !*App {
var core_app = try CoreApp.create(global.alloc);
errdefer core_app.destroy();
// Create our runtime app
var app = try global.alloc.create(App);
errdefer global.alloc.destroy(app);
app.* = try App.init(core_app, config, opts.*);
errdefer app.terminate();
return app;
}
/// Tick the event loop. This should be called whenever the "wakeup"
/// callback is invoked for the runtime.
export fn ghostty_app_tick(v: *App) bool {
return v.core_app.tick(v) catch |err| err: {
log.err("error app tick err={}", .{err});
break :err false;
};
}
/// Return the userdata associated with the app.
export fn ghostty_app_userdata(v: *App) ?*anyopaque {
return v.opts.userdata;
}
export fn ghostty_app_free(v: *App) void {
const core_app = v.core_app;
v.terminate();
global.alloc.destroy(v);
core_app.destroy();
}
/// Update the focused state of the app.
export fn ghostty_app_set_focus(
app: *App,
focused: bool,
) void {
app.focusEvent(focused);
}
/// Notify the app of a global keypress capture. This will return
/// true if the key was captured by the app, in which case the caller
/// should not process the key.
export fn ghostty_app_key(
app: *App,
event: KeyEvent,
) bool {
return app.keyEvent(.app, event.keyEvent()) catch |err| {
log.warn("error processing key event err={}", .{err});
return false;
};
}
/// Notify the app that the keyboard was changed. This causes the
/// keyboard layout to be reloaded from the OS.
export fn ghostty_app_keyboard_changed(v: *App) void {
v.reloadKeymap() catch |err| {
log.err("error reloading keyboard map err={}", .{err});
return;
};
}
/// Open the configuration.
export fn ghostty_app_open_config(v: *App) void {
v.performAction(.app, .open_config, {}) catch |err| {
log.err("error reloading config err={}", .{err});
return;
};
}
/// Update the configuration to the provided config. This will propagate
/// to all surfaces as well.
export fn ghostty_app_update_config(
v: *App,
config: *const Config,
) void {
v.core_app.updateConfig(v, config) catch |err| {
log.err("error updating config err={}", .{err});
return;
};
}
/// Returns true if the app needs to confirm quitting.
export fn ghostty_app_needs_confirm_quit(v: *App) bool {
return v.core_app.needsConfirmQuit();
}
/// Returns true if the app has global keybinds.
export fn ghostty_app_has_global_keybinds(v: *App) bool {
return v.hasGlobalKeybinds();
}
/// Update the color scheme of the app.
export fn ghostty_app_set_color_scheme(v: *App, scheme_raw: c_int) void {
const scheme = std.meta.intToEnum(apprt.ColorScheme, scheme_raw) catch {
log.warn(
"invalid color scheme to ghostty_surface_set_color_scheme value={}",
.{scheme_raw},
);
return;
};
v.core_app.colorSchemeEvent(v, scheme) catch |err| {
log.err("error setting color scheme err={}", .{err});
return;
};
}
/// Returns initial surface options.
export fn ghostty_surface_config_new() apprt.Surface.Options {
return .{};
}
/// Create a new surface as part of an app.
export fn ghostty_surface_new(
app: *App,
opts: *const apprt.Surface.Options,
) ?*Surface {
return surface_new_(app, opts) catch |err| {
log.err("error initializing surface err={}", .{err});
return null;
};
}
fn surface_new_(
app: *App,
opts: *const apprt.Surface.Options,
) !*Surface {
return try app.newSurface(opts.*);
}
export fn ghostty_surface_free(ptr: *Surface) void {
ptr.app.closeSurface(ptr);
}
/// Returns the userdata associated with the surface.
export fn ghostty_surface_userdata(surface: *Surface) ?*anyopaque {
return surface.userdata;
}
/// Returns the app associated with a surface.
export fn ghostty_surface_app(surface: *Surface) *App {
return surface.app;
}
/// Returns the config to use for surfaces that inherit from this one.
export fn ghostty_surface_inherited_config(surface: *Surface) Surface.Options {
return surface.newSurfaceOptions();
}
/// Update the configuration to the provided config for only this surface.
export fn ghostty_surface_update_config(
surface: *Surface,
config: *const Config,
) void {
surface.core_surface.updateConfig(config) catch |err| {
log.err("error updating config err={}", .{err});
return;
};
}
/// Returns true if the surface needs to confirm quitting.
export fn ghostty_surface_needs_confirm_quit(surface: *Surface) bool {
return surface.core_surface.needsConfirmQuit();
}
/// Returns true if the surface has a selection.
export fn ghostty_surface_has_selection(surface: *Surface) bool {
return surface.core_surface.hasSelection();
}
/// Copies the surface selection text into the provided buffer and
/// returns the copied size. If the buffer is too small, there is no
/// selection, or there is an error, then 0 is returned.
export fn ghostty_surface_selection(surface: *Surface, buf: [*]u8, cap: usize) usize {
const selection_ = surface.core_surface.selectionString(global.alloc) catch |err| {
log.warn("error getting selection err={}", .{err});
return 0;
};
const selection = selection_ orelse return 0;
defer global.alloc.free(selection);
// If the buffer is too small, return no selection.
if (selection.len > cap) return 0;
// Copy into the buffer and return the length
@memcpy(buf[0..selection.len], selection);
return selection.len;
}
/// Tell the surface that it needs to schedule a render
export fn ghostty_surface_refresh(surface: *Surface) void {
surface.refresh();
}
/// Tell the surface that it needs to schedule a render
/// call as soon as possible (NOW if possible).
export fn ghostty_surface_draw(surface: *Surface) void {
surface.draw();
}
/// Update the size of a surface. This will trigger resize notifications
/// to the pty and the renderer.
export fn ghostty_surface_set_size(surface: *Surface, w: u32, h: u32) void {
surface.updateSize(w, h);
}
/// Return the size information a surface has.
export fn ghostty_surface_size(surface: *Surface) SurfaceSize {
const grid_size = surface.core_surface.size.grid();
return .{
.columns = grid_size.columns,
.rows = grid_size.rows,
.width_px = surface.core_surface.size.screen.width,
.height_px = surface.core_surface.size.screen.height,
.cell_width_px = surface.core_surface.size.cell.width,
.cell_height_px = surface.core_surface.size.cell.height,
};
}
/// Update the color scheme of the surface.
export fn ghostty_surface_set_color_scheme(surface: *Surface, scheme_raw: c_int) void {
const scheme = std.meta.intToEnum(apprt.ColorScheme, scheme_raw) catch {
log.warn(
"invalid color scheme to ghostty_surface_set_color_scheme value={}",
.{scheme_raw},
);
return;
};
surface.colorSchemeCallback(scheme);
}
/// Update the content scale of the surface.
export fn ghostty_surface_set_content_scale(surface: *Surface, x: f64, y: f64) void {
surface.updateContentScale(x, y);
}
/// Update the focused state of a surface.
export fn ghostty_surface_set_focus(surface: *Surface, focused: bool) void {
surface.focusCallback(focused);
}
/// Update the occlusion state of a surface.
export fn ghostty_surface_set_occlusion(surface: *Surface, visible: bool) void {
surface.occlusionCallback(visible);
}
/// Filter the mods if necessary. This handles settings such as
/// `macos-option-as-alt`. The filtered mods should be used for
/// key translation but should NOT be sent back via the `_key`
/// function -- the original mods should be used for that.
export fn ghostty_surface_key_translation_mods(
surface: *Surface,
mods_raw: c_int,
) c_int {
const mods: input.Mods = @bitCast(@as(
input.Mods.Backing,
@truncate(@as(c_uint, @bitCast(mods_raw))),
));
const result = mods.translation(
surface.core_surface.config.macos_option_as_alt orelse
surface.app.keyboardLayout().detectOptionAsAlt(),
);
return @intCast(@as(input.Mods.Backing, @bitCast(result)));
}
/// Send this for raw keypresses (i.e. the keyDown event on macOS).
/// This will handle the keymap translation and send the appropriate
/// key and char events.
export fn ghostty_surface_key(
surface: *Surface,
event: KeyEvent,
) void {
_ = surface.app.keyEvent(
.{ .surface = surface },
event.keyEvent(),
) catch |err| {
log.warn("error processing key event err={}", .{err});
return;
};
}
/// Send raw text to the terminal. This is treated like a paste
/// so this isn't useful for sending escape sequences. For that,
/// individual key input should be used.
export fn ghostty_surface_text(
surface: *Surface,
ptr: [*]const u8,
len: usize,
) void {
surface.textCallback(ptr[0..len]);
}
/// Returns true if the surface currently has mouse capturing
/// enabled.
export fn ghostty_surface_mouse_captured(surface: *Surface) bool {
return surface.core_surface.mouseCaptured();
}
/// Tell the surface that it needs to schedule a render
export fn ghostty_surface_mouse_button(
surface: *Surface,
action: input.MouseButtonState,
button: input.MouseButton,
mods: c_int,
) bool {
return surface.mouseButtonCallback(
action,
button,
@bitCast(@as(
input.Mods.Backing,
@truncate(@as(c_uint, @bitCast(mods))),
)),
);
}
/// Update the mouse position within the view.
export fn ghostty_surface_mouse_pos(
surface: *Surface,
x: f64,
y: f64,
mods: c_int,
) void {
surface.cursorPosCallback(
x,
y,
@bitCast(@as(
input.Mods.Backing,
@truncate(@as(c_uint, @bitCast(mods))),
)),
);
}
export fn ghostty_surface_mouse_scroll(
surface: *Surface,
x: f64,
y: f64,
scroll_mods: c_int,
) void {
surface.scrollCallback(
x,
y,
@bitCast(@as(u8, @truncate(@as(c_uint, @bitCast(scroll_mods))))),
);
}
export fn ghostty_surface_mouse_pressure(
surface: *Surface,
stage_raw: u32,
pressure: f64,
) void {
const stage = std.meta.intToEnum(
input.MousePressureStage,
stage_raw,
) catch {
log.warn(
"invalid mouse pressure stage value={}",
.{stage_raw},
);
return;
};
surface.mousePressureCallback(stage, pressure);
}
export fn ghostty_surface_ime_point(surface: *Surface, x: *f64, y: *f64) void {
const pos = surface.core_surface.imePoint();
x.* = pos.x;
y.* = pos.y;
}
/// Request that the surface become closed. This will go through the
/// normal trigger process that a close surface input binding would.
export fn ghostty_surface_request_close(ptr: *Surface) void {
ptr.core_surface.close();
}
/// Request that the surface split in the given direction.
export fn ghostty_surface_split(ptr: *Surface, direction: apprt.action.SplitDirection) void {
ptr.app.performAction(
.{ .surface = &ptr.core_surface },
.new_split,
direction,
) catch |err| {
log.err("error creating new split err={}", .{err});
return;
};
}
/// Focus on the next split (if any).
export fn ghostty_surface_split_focus(
ptr: *Surface,
direction: apprt.action.GotoSplit,
) void {
ptr.app.performAction(
.{ .surface = &ptr.core_surface },
.goto_split,
direction,
) catch |err| {
log.err("error creating new split err={}", .{err});
return;
};
}
/// Resize the current split by moving the split divider in the given
/// direction. `direction` specifies which direction the split divider will
/// move relative to the focused split. `amount` is a fractional value
/// between 0 and 1 that specifies by how much the divider will move.
export fn ghostty_surface_split_resize(
ptr: *Surface,
direction: apprt.action.ResizeSplit.Direction,
amount: u16,
) void {
ptr.app.performAction(
.{ .surface = &ptr.core_surface },
.resize_split,
.{ .direction = direction, .amount = amount },
) catch |err| {
log.err("error resizing split err={}", .{err});
return;
};
}
/// Equalize the size of all splits in the current window.
export fn ghostty_surface_split_equalize(ptr: *Surface) void {
ptr.app.performAction(
.{ .surface = &ptr.core_surface },
.equalize_splits,
{},
) catch |err| {
log.err("error equalizing splits err={}", .{err});
return;
};
}
/// Invoke an action on the surface.
export fn ghostty_surface_binding_action(
ptr: *Surface,
action_ptr: [*]const u8,
action_len: usize,
) bool {
const action_str = action_ptr[0..action_len];
const action = input.Binding.Action.parse(action_str) catch |err| {
log.err("error parsing binding action action={s} err={}", .{ action_str, err });
return false;
};
_ = ptr.core_surface.performBindingAction(action) catch |err| {
log.err("error performing binding action action={} err={}", .{ action, err });
return false;
};
return true;
}
/// Complete a clipboard read request started via the read callback.
/// This can only be called once for a given request. Once it is called
/// with a request the request pointer will be invalidated.
export fn ghostty_surface_complete_clipboard_request(
ptr: *Surface,
str: [*:0]const u8,
state: *apprt.ClipboardRequest,
confirmed: bool,
) void {
ptr.completeClipboardRequest(
std.mem.sliceTo(str, 0),
state,
confirmed,
);
}
export fn ghostty_surface_inspector(ptr: *Surface) ?*Inspector {
return ptr.initInspector() catch |err| {
log.err("error initializing inspector err={}", .{err});
return null;
};
}
export fn ghostty_inspector_free(ptr: *Surface) void {
ptr.freeInspector();
}
export fn ghostty_inspector_set_size(ptr: *Inspector, w: u32, h: u32) void {
ptr.updateSize(w, h);
}
export fn ghostty_inspector_set_content_scale(ptr: *Inspector, x: f64, y: f64) void {
ptr.updateContentScale(x, y);
}
export fn ghostty_inspector_mouse_button(
ptr: *Inspector,
action: input.MouseButtonState,
button: input.MouseButton,
mods: c_int,
) void {
ptr.mouseButtonCallback(
action,
button,
@bitCast(@as(
input.Mods.Backing,
@truncate(@as(c_uint, @bitCast(mods))),
)),
);
}
export fn ghostty_inspector_mouse_pos(ptr: *Inspector, x: f64, y: f64) void {
ptr.cursorPosCallback(x, y);
}
export fn ghostty_inspector_mouse_scroll(
ptr: *Inspector,
x: f64,
y: f64,
scroll_mods: c_int,
) void {
ptr.scrollCallback(
x,
y,
@bitCast(@as(u8, @truncate(@as(c_uint, @bitCast(scroll_mods))))),
);
}
export fn ghostty_inspector_key(
ptr: *Inspector,
action: input.Action,
key: input.Key,
c_mods: c_int,
) void {
ptr.keyCallback(
action,
key,
@bitCast(@as(
input.Mods.Backing,
@truncate(@as(c_uint, @bitCast(c_mods))),
)),
) catch |err| {
log.err("error processing key event err={}", .{err});
return;
};
}
export fn ghostty_inspector_text(
ptr: *Inspector,
str: [*:0]const u8,
) void {
ptr.textCallback(std.mem.sliceTo(str, 0));
}
export fn ghostty_inspector_set_focus(ptr: *Inspector, focused: bool) void {
ptr.focusCallback(focused);
}
/// Sets the window background blur on macOS to the desired value.
/// I do this in Zig as an extern function because I don't know how to
/// call these functions in Swift.
///
/// This uses an undocumented, non-public API because this is what
/// every terminal appears to use, including Terminal.app.
export fn ghostty_set_window_background_blur(
app: *App,
window: *anyopaque,
) void {
// This is only supported on macOS
if (comptime builtin.target.os.tag != .macos) return;
const config = &app.config;
// Do nothing if we don't have background transparency enabled
if (config.@"background-opacity" >= 1.0) return;
// Do nothing if our blur value is zero
if (config.@"background-blur-radius" == 0) return;
const nswindow = objc.Object.fromId(window);
_ = CGSSetWindowBackgroundBlurRadius(
CGSDefaultConnectionForThread(),
nswindow.msgSend(usize, objc.sel("windowNumber"), .{}),
@intCast(config.@"background-blur-radius"),
);
}
/// See ghostty_set_window_background_blur
extern "c" fn CGSSetWindowBackgroundBlurRadius(*anyopaque, usize, c_int) i32;
extern "c" fn CGSDefaultConnectionForThread() *anyopaque;
// Darwin-only C APIs.
const Darwin = struct {
export fn ghostty_surface_set_display_id(ptr: *Surface, display_id: u32) void {
const surface = &ptr.core_surface;
_ = surface.renderer_thread.mailbox.push(
.{ .macos_display_id = display_id },
.{ .forever = {} },
);
surface.renderer_thread.wakeup.notify() catch {};
}
/// This returns a CTFontRef that should be used for quicklook
/// highlighted text. This is always the primary font in use
/// regardless of the selected text. If coretext is not in use
/// then this will return nothing.
export fn ghostty_surface_quicklook_font(ptr: *Surface) ?*anyopaque {
// For non-CoreText we just return null.
if (comptime font.options.backend != .coretext) {
return null;
}
// We'll need content scale so fail early if we can't get it.
const content_scale = ptr.getContentScale() catch return null;
// Get the shared font grid. We acquire a read lock to
// read the font face. It should not be deferred since
// we're loading the primary face.
const grid = ptr.core_surface.renderer.font_grid;
grid.lock.lockShared();
defer grid.lock.unlockShared();
const collection = &grid.resolver.collection;
const face = collection.getFace(.{}) catch return null;
// We need to unscale the content scale. We apply the
// content scale to our font stack because we are rendering
// at 1x but callers of this should be using scaled or apply
// scale themselves.
const size: f32 = size: {
const num = face.font.copyAttribute(.size) orelse
break :size 12;
defer num.release();
var v: f32 = 12;
_ = num.getValue(.float, &v);
break :size v;
};
const copy = face.font.copyWithAttributes(
size / content_scale.y,
null,
null,
) catch return null;
return copy;
}
/// This returns the selected word for quicklook. This will populate
/// the buffer with the word under the cursor and the selection
/// info so that quicklook can be rendered.
///
/// This does not modify the selection active on the surface (if any).
export fn ghostty_surface_quicklook_word(
ptr: *Surface,
buf: [*]u8,
cap: usize,
info: *Selection,
) usize {
const surface = &ptr.core_surface;
surface.renderer_state.mutex.lock();
defer surface.renderer_state.mutex.unlock();
// To make everything in this function easier, we modify the
// selection to be the word under the cursor and call normal APIs.
// We restore the old selection so it isn't ever changed. Since we hold
// the renderer mutex it'll never show up in a frame.
const prev = surface.io.terminal.screen.selection;
defer surface.io.terminal.screen.selection = prev;
// Get our word selection
const sel = sel: {
const screen = &surface.renderer_state.terminal.screen;
const pos = try ptr.getCursorPos();
const pt_viewport = surface.posToViewport(pos.x, pos.y);
const pin = screen.pages.pin(.{
.viewport = .{
.x = pt_viewport.x,
.y = pt_viewport.y,
},
}) orelse {
if (comptime std.debug.runtime_safety) unreachable;
return 0;
};
break :sel surface.io.terminal.screen.selectWord(pin) orelse return 0;
};
// Set the selection
surface.io.terminal.screen.selection = sel;
// No we call normal functions. These require that the lock
// is unlocked. This may cause a frame flicker with the fake
// selection but I think the lack of new complexity is worth it
// for now.
{
surface.renderer_state.mutex.unlock();
defer surface.renderer_state.mutex.lock();
const len = ghostty_surface_selection(ptr, buf, cap);
if (!ghostty_surface_selection_info(ptr, info)) return 0;
return len;
}
}
/// This returns the selection metadata for the current selection.
/// This will return false if there is no selection or the
/// selection is not fully contained in the viewport (since the
/// metadata is all about that).
export fn ghostty_surface_selection_info(
ptr: *Surface,
info: *Selection,
) bool {
const sel = ptr.core_surface.selectionInfo() orelse
return false;
info.* = .{
.tl_x_px = sel.tl_x_px,
.tl_y_px = sel.tl_y_px,
.offset_start = sel.offset_start,
.offset_len = sel.offset_len,
};
return true;
}
export fn ghostty_inspector_metal_init(ptr: *Inspector, device: objc.c.id) bool {
return ptr.initMetal(objc.Object.fromId(device));
}
export fn ghostty_inspector_metal_render(
ptr: *Inspector,
command_buffer: objc.c.id,
descriptor: objc.c.id,
) void {
return ptr.renderMetal(
objc.Object.fromId(command_buffer),
objc.Object.fromId(descriptor),
) catch |err| {
log.err("error rendering inspector err={}", .{err});
return;
};
}
export fn ghostty_inspector_metal_shutdown(ptr: *Inspector) void {
if (ptr.backend) |v| {
v.deinit();
ptr.backend = null;
}
}
};
};