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|
use fmt;
use unix::tty;
use io;
use strings;
use memio;
use os;
use strconv;
export type coords = (u16, u16);
export type printfn = fn(w: *widget) void;
export type resizefn = fn(w: *widget, ttysize: tty::ttysize) void;
export type widgetsize = (tty::ttysize | void);
export type color = enum uint {
BLACKFG = 30,
REDFG = 31,
GREENFG = 32,
BROWNFG = 33,
BLUEFG = 34,
MAGENTAFG = 35,
CYANFG = 36,
WHITEFG = 37,
DEFAULTFG = 39,
BLACKBG = 40,
REDBG = 41,
GREENBG = 42,
BROWNBG = 43,
BLUEBG = 44,
MAGENTABG = 45,
CYANBG = 46,
WHITEBG = 47,
DEFAULTBG = 49,
};
export type style = struct {
border: bool,
colorfg: color,
colorbg: color,
};
export def DEFAULT_STYLE: style = style {
border = false,
colorfg = color::DEFAULTFG,
colorbg = color::DEFAULTBG,
};
export type widget = struct {
out: io::file,
print: *printfn,
resize: *resizefn,
buf: str,
pos: coords,
sz: widgetsize,
style: (*style | void),
};
def gotoroot: str = "\x1B[1;1H";
def UNDERLINE: str = "\x1B[4m";
def NOUNDERLINE: str = "\x1B[0m";
def OVERLINE: rune = '\u0305';
def NOOVERLINE: str = "\x1B[0m";
// Must free return value
fn underline(s: str) str = {
return strings::concat(UNDERLINE, s, NOUNDERLINE);
};
// Must free return value
fn overline(s: str) str = {
const st = memio::dynamic();
defer io::close(&st)!;
let iter = strings::iter(s);
for (let r: rune => strings::next(&iter)) {
const char = strings::fromrunes([r, OVERLINE]);
defer free(char);
memio::concat(&st, char)!;
};
return strings::dup(memio::string(&st)!);
};
fn minrows(out: io::file, x: u16, y: widgetsize) (u16 | tty::error) = {
const y = match (y) {
case let y: tty::ttysize =>
yield y;
case void =>
yield tty::winsize(out)?;
};
return if (x < y.rows) x else y.rows;
};
// Must free return string
fn color_to_str(color: color) str = fmt::asprintf("\x1B[{}m", strconv::utos(color));
export fn print(w: *widget) void = {
fmt::fprintf(w.out, "\x1B[{};{}H", w.pos.0, w.pos.1)!;
let s = truncate_to_size(w);
let sstyle = match (w.style) {
case let st: *style =>
defer free(s);
let sborder = if (st.border) {
yield border(s);
} else {
yield strings::dup(s);
};
defer free(sborder);
const scolor = color_to_str(st.colorfg);
defer free(scolor);
const defcolor = color_to_str(color::DEFAULTFG);
defer free(defcolor);
yield strings::concat(scolor, sborder, defcolor);
case void =>
yield s;
};
defer free(sstyle);
fmt::fprint(w.out, sstyle)!;
};
// Truncates the text of the widget to the widget's size (rows and columns) and
// returns the resulting string.
fn truncate_to_size(w: *widget) str = {
let spl = strings::split(w.buf, "\n");
const st = memio::dynamic();
defer io::close(&st)!;
for (let i = 0z; i < minrows(w.out, len(spl): u16, w.sz)!; i += 1) {
const line = spl[i];
let item = match (w.sz) {
case let sz: tty::ttysize =>
const s = if (len(line) > sz.columns) strings::sub(line, 0z, sz.columns) else line;
yield strings::rpad(s, ' ', sz.columns);
case void =>
yield strings::dup(line);
};
defer free(item);
memio::concat(&st, item)!;
if (i < len(spl) - 1) {
memio::concat(&st, "\n")!;
};
};
return strings::dup(memio::string(&st)!);
};
fn border(s: str) str = {
let st = memio::dynamic();
defer io::close(&st)!;
let spl = strings::split(s, "\n");
for (let i = 0z; i < len(spl); i += 1) {
const s = strings::concat("|", spl[i], "|");
//const s = strings::dup(spl[i]);
defer free(s);
if (i == 0) {
s = overline(s);
};
if (i == len(spl) - 1) {
s = underline(s);
};
//memio::concat(&st, "|", s, "|")!;
memio::concat(&st, s)!;
if (i < len(spl) - 1) {
memio::concat(&st, "\n")!;
};
};
return strings::dup(memio::string(&st)!);
};
export fn prints(out: io::file, s: str, pos: coords) void = {
fmt::fprintf(out, "\x1B[{};{}H", pos.0, pos.1)!;
fmt::fprint(out, s)!;
};
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