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const es = @import("root");
const std = @import("std");
const Buffer = es.Buffer;
const Editor = es.Editor;
const Key = es.Key;
pub const Error = error{
MalformedConfig,
MisformedTerminalResponse,
StreamTooLong,
} ||
std.mem.Allocator.Error ||
std.fmt.ParseIntError ||
std.fs.File.OpenError ||
std.fs.File.ReadError ||
std.fs.File.WriteError ||
std.os.GetCwdError ||
std.os.RealPathError;
pub const KeyState = fn (*Editor, *Buffer, Key) Error!void;
fn mgState(editor: *Editor, buf: *Buffer, key: Key) Error!void {
editor.current_state = defaultState;
editor.clearStatusMessage();
switch (key) {
// ========== <*> ==========
Key.char('g') => try buf.goToLine(editor),
else => {
std.log.debug("Unknown chord: M-g {}", .{key});
try editor.setStatusMessage("Unknown chord: M-g {}", .{key});
},
}
}
fn mOState(editor: *Editor, buf: *Buffer, key: Key) Error!void {
editor.current_state = defaultState;
editor.clearStatusMessage();
switch (key) {
// ========== <*> ==========
Key.char('F') => buf.moveEndOfLine(),
Key.char('H') => buf.moveBeginningOfLine(),
else => {
std.log.debug("Unknown chord: M-O {}", .{key});
try editor.setStatusMessage("Unknown chord: M-O {}", .{key});
},
}
}
fn cxState(editor: *Editor, buf: *Buffer, key: Key) Error!void {
editor.current_state = defaultState;
editor.clearStatusMessage();
switch (key) {
// ========== C-<*> ==========
Key.ctrl('b'), Key.char('b') => try editor.switchBuffer(),
Key.ctrl('c') => try editor.saveBuffersExit(),
Key.ctrl('f') => try editor.openFile(),
Key.ctrl('g') => {},
Key.ctrl('s') => try buf.save(editor),
// ========== <*> ==========
Key.char('k') => _ = try editor.killCurrentBuffer(),
else => {
std.log.debug("Unknown chord: C-x {}", .{key});
try editor.setStatusMessage("Unknown chord: C-x {}", .{key});
},
}
}
pub fn defaultState(editor: *Editor, buf: *Buffer, key: Key) Error!void {
switch (key) {
// ========== M-C-<*> ==========
Key.meta(Key.ctrl('d')), Key.backspace => try buf.backwardDeleteChar(),
// ========== M-<*> ==========
Key.meta('g') => {
editor.current_state = mgState;
try editor.setStatusMessage("M-g-", .{});
},
Key.meta('O') => editor.current_state = mOState,
Key.meta('v'), Key.page_up => buf.pageUp(editor.screenrows),
// ========== C-<*> ==========
Key.ctrl('a'), Key.home => buf.moveBeginningOfLine(),
Key.ctrl('b'), Key.left => buf.backwardChar(),
Key.ctrl('d'), Key.delete => try buf.deleteChar(),
Key.ctrl('e'), Key.end => buf.moveEndOfLine(),
Key.ctrl('f'), Key.right => buf.forwardChar(),
Key.ctrl('g') => editor.clearStatusMessage(),
// TODO: C-h help
// tab
Key.ctrl('i') => try buf.indent(),
// line feed
Key.ctrl('j') => try buf.insertNewline(),
Key.ctrl('k') => try buf.killLine(),
Key.ctrl('l') => {
try editor.refreshWindowSize();
buf.recenterTopBottom(editor.screenrows);
},
// carriage return
Key.ctrl('m') => try buf.insertNewline(),
Key.ctrl('n'), Key.down => buf.nextLine(),
Key.ctrl('p'), Key.up => buf.previousLine(),
Key.ctrl('s') => try es.search(editor, buf),
// TODO: C-q quotedInsert
Key.ctrl('v'), Key.page_down => buf.pageDown(editor.screenrows),
Key.ctrl('x') => {
editor.current_state = cxState;
try editor.setStatusMessage("C-x-", .{});
},
// ========== <*> ==========
Key.untab => try buf.unindent(),
else => {
if (@enumToInt(key) <= @enumToInt(Key.max_char)) {
const char = @intCast(u8, @enumToInt(key));
if (std.ascii.isGraph(char) or std.ascii.isSpace(char)) {
try buf.insertChar(char);
return;
}
}
std.log.debug("Unknown key: {}", .{key});
try editor.setStatusMessage("Unknown key: {}", .{key});
},
}
}
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