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examples/text_editor: edit multiple files (#6827)

pull/6832/head
Carlos Esquerdo Bernat 2020-11-14 18:39:59 +01:00 committed by GitHub
parent 50163508f8
commit 827fb62c29
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2 changed files with 172 additions and 82 deletions
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243
examples/term.ui/text_editor.v
View File

@ -13,6 +13,8 @@ enum Movement {
right
home
end
page_up
page_down
}
struct View {
@ -23,13 +25,14 @@ pub:
struct App {
mut:
tui &tui.Context = 0
ed &Buffer = 0
file string
status string
t int
tui &tui.Context = 0
ed &Buffer = 0
current_file int
files []string
status string
t int
footer_height int = 2
viewport int
viewport int
}
fn (mut a App) set_status(msg string, duration_ms int) {
@ -38,24 +41,50 @@ fn (mut a App) set_status(msg string, duration_ms int) {
}
fn (mut a App) save() {
if a.file.len > 0 {
if a.cfile().len > 0 {
b := a.ed
os.write_file(a.file, b.raw())
os.write_file(a.cfile(), b.raw())
a.set_status('Saved', 2000)
} else {
a.set_status('No file loaded', 4000)
}
}
fn (mut a App) cfile() string {
if a.files.len == 0 {
return ''
}
if a.current_file >= a.files.len {
return ''
}
return a.files[a.current_file]
}
fn (mut a App) visit_prev_file() {
if a.files.len == 0 {
a.current_file = 0
} else {
a.current_file = (a.current_file + a.files.len - 1) % a.files.len
}
a.init_file()
}
fn (mut a App) visit_next_file() {
if a.files.len == 0 {
a.current_file = 0
} else {
a.current_file = (a.current_file + a.files.len + 1) % a.files.len
}
a.init_file()
}
fn (mut a App) footer() {
w, h := a.tui.window_width, a.tui.window_height
mut b := a.ed
// flat := b.flat()
// snip := if flat.len > 19 { flat[..20] } else { flat }
mut finfo := ''
if a.file.len > 0 {
finfo = ' (' + os.file_name(a.file) + ')'
}
finfo := if a.cfile().len > 0 { ' (' + os.file_name(a.cfile()) + ')' } else { '' }
mut status := a.status
a.tui.draw_text(0, h - 1, '─'.repeat(w))
footer := '$finfo Line ${b.cursor.pos_y + 1:4}/${b.lines.len:-4}, Column ${b.cursor.pos_x + 1:3}/${b.cur_line().len:-3} index: ${b.cursor_index():5} (ESC = quit, Ctrl+s = save)'
@ -69,8 +98,16 @@ fn (mut a App) footer() {
if a.t <= 0 {
status = ''
} else {
a.tui.set_bg_color(r: 200, g: 200, b: 200)
a.tui.set_color(r: 0, g: 0, b: 0)
a.tui.set_bg_color({
r: 200
g: 200
b: 200
})
a.tui.set_color({
r: 0
g: 0
b: 0
})
a.tui.draw_text((w + 4 - status.len) / 2, h - 1, ' $status ')
a.tui.reset()
a.t -= 33
@ -78,10 +115,10 @@ fn (mut a App) footer() {
}
struct Buffer {
tab_width int = 4
tab_width int = 4
pub mut:
lines []string
cursor Cursor
lines []string
cursor Cursor
}
fn (b Buffer) flat() string {
@ -118,12 +155,15 @@ fn (b Buffer) view(from int, to int) View {
}
}
fn (b Buffer) cur_line() string {
_, y := b.cursor.xy()
if b.lines.len == 0 {
fn (b Buffer) line(i int) string {
if i < 0 || i >= b.lines.len {
return ''
}
return b.lines[y]
return b.lines[i]
}
fn (b Buffer) cur_line() string {
return b.line(b.cursor.pos_y)
}
fn (b Buffer) cursor_index() int {
@ -265,38 +305,49 @@ fn (mut b Buffer) free() {
unsafe {b.lines.free()}
}
fn (mut b Buffer) move_updown(amount int) {
b.cursor.move(0, amount)
// Check the move
line := b.cur_line()
if b.cursor.pos_x > line.len {
b.cursor.set(line.len, b.cursor.pos_y)
}
}
// move_cursor will navigate the cursor within the buffer bounds
fn (mut b Buffer) move_cursor(amount int, movement Movement) {
cur_line := b.cur_line()
match movement {
.up {
if b.cursor.pos_y - amount >= 0 {
b.cursor.move(0, -amount)
// Check the move
line := b.cur_line()
if b.cursor.pos_x > line.len {
b.cursor.set(line.len, b.cursor.pos_y)
}
b.move_updown(-amount)
}
}
.down {
if b.cursor.pos_y + amount < b.lines.len {
b.cursor.move(0, amount)
// Check the move
line := b.cur_line()
if b.cursor.pos_x > line.len {
b.cursor.set(line.len, b.cursor.pos_y)
}
b.move_updown(amount)
}
}
.page_up {
dlines := imin(b.cursor.pos_y, amount)
b.move_updown(-dlines)
}
.page_down {
dlines := imin(b.lines.len-1, b.cursor.pos_y + amount) - b.cursor.pos_y
b.move_updown(dlines)
}
.left {
if b.cursor.pos_x - amount >= 0 {
b.cursor.move(-amount, 0)
} else if b.cursor.pos_y > 0 {
b.cursor.set(b.line(b.cursor.pos_y - 1).len, b.cursor.pos_y - 1)
}
}
.right {
if b.cursor.pos_x + amount <= cur_line.len {
b.cursor.move(amount, 0)
} else if b.cursor.pos_y + 1 < b.lines.len {
b.cursor.set(0, b.cursor.pos_y + 1)
}
}
.home {
@ -308,6 +359,14 @@ fn (mut b Buffer) move_cursor(amount int, movement Movement) {
}
}
fn imax(x int, y int) int {
return if x < y { y } else { x }
}
fn imin(x int, y int) int {
return if x < y { x } else { y }
}
struct Cursor {
pub mut:
pos_x int
@ -330,16 +389,21 @@ fn (c Cursor) xy() (int, int) {
// App callbacks
fn init(x voidptr) {
mut app := &App(x)
app.ed = &Buffer{}
mut a := &App(x)
a.init_file()
}
fn (mut a App) init_file() {
a.ed = &Buffer{}
mut init_y := 0
mut init_x := 0
if app.file.len > 0 {
if !os.is_file(app.file) && app.file.contains(':') {
eprintln('> a.files: $a.files | a.current_file: $a.current_file')
if a.files.len > 0 && a.current_file < a.files.len && a.files[a.current_file].len > 0 {
if !os.is_file(a.files[a.current_file]) && a.files[a.current_file].contains(':') {
// support the file:line:col: format
fparts := app.file.split(':')
fparts := a.files[a.current_file].split(':')
if fparts.len > 0 {
app.file = fparts[0]
a.files[a.current_file] = fparts[0]
}
if fparts.len > 1 {
init_y = fparts[1].int() - 1
@ -348,46 +412,50 @@ fn init(x voidptr) {
init_x = fparts[2].int() - 1
}
}
if os.is_file(app.file) {
app.tui.set_window_title(/* 'vico: ' + */app.file)
mut b := app.ed
content := os.read_file(app.file) or {
if os.is_file(a.files[a.current_file]) {
// 'vico: ' +
a.tui.set_window_title(a.files[a.current_file])
mut b := a.ed
content := os.read_file(a.files[a.current_file]) or {
panic(err)
}
b.put(content)
app.ed.cursor.pos_x = init_x
app.ed.cursor.pos_y = init_y
a.ed.cursor.pos_x = init_x
a.ed.cursor.pos_y = init_y
}
}
}
fn frame(x voidptr) {
mut app := &App(x)
mut ed := app.ed
app.tui.clear()
fn (a &App) view_height() int {
return a.tui.window_height - a.footer_height - 1
}
scroll_limit := app.tui.window_height-app.footer_height-1
fn frame(x voidptr) {
mut a := &App(x)
mut ed := a.ed
a.tui.clear()
scroll_limit := a.view_height()
// scroll down
if ed.cursor.pos_y > app.viewport+scroll_limit { // scroll down
app.viewport = ed.cursor.pos_y-scroll_limit
} else if ed.cursor.pos_y < app.viewport { // scroll up
app.viewport = ed.cursor.pos_y
if ed.cursor.pos_y > a.viewport + scroll_limit { // scroll down
a.viewport = ed.cursor.pos_y - scroll_limit
} else if ed.cursor.pos_y < a.viewport { // scroll up
a.viewport = ed.cursor.pos_y
}
view := ed.view(app.viewport, scroll_limit+app.viewport)
app.tui.draw_text(0, 0, view.raw)
app.footer()
app.tui.set_cursor_position(view.cursor.pos_x + 1, ed.cursor.pos_y + 1 - app.viewport)
app.tui.flush()
view := ed.view(a.viewport, scroll_limit + a.viewport)
a.tui.draw_text(0, 0, view.raw)
a.footer()
a.tui.set_cursor_position(view.cursor.pos_x + 1, ed.cursor.pos_y + 1 - a.viewport)
a.tui.flush()
}
fn event(e &tui.Event, x voidptr) {
mut app := &App(x)
mut buffer := app.ed
mut a := &App(x)
mut buffer := a.ed
if e.typ == .key_down {
match e.code {
.escape {
app.tui.set_cursor_position(0, 0)
app.tui.flush()
a.tui.set_cursor_position(0, 0)
a.tui.flush()
exit(0)
}
.backspace {
@ -408,6 +476,12 @@ fn event(e &tui.Event, x voidptr) {
.down {
buffer.move_cursor(1, .down)
}
.page_up {
buffer.move_cursor(a.view_height(), .page_up)
}
.page_down {
buffer.move_cursor(a.view_height(), .page_down)
}
.home {
buffer.move_cursor(1, .home)
}
@ -417,13 +491,23 @@ fn event(e &tui.Event, x voidptr) {
48...57, 97...122 { // 0-9a-zA-Z
if e.modifiers == tui.ctrl {
if e.code == .s {
app.save()
a.save()
}
} else if e.modifiers in [tui.shift, 0] {
buffer.put(e.ascii.str())
}
}
else {
if e.modifiers == tui.alt {
if e.code == .comma {
a.visit_prev_file()
return
}
if e.code == .period {
a.visit_next_file()
return
}
}
buffer.put(e.utf8.bytes().bytestr())
}
}
@ -433,19 +517,20 @@ fn event(e &tui.Event, x voidptr) {
}
}
// main
mut file := ''
if os.args.len > 1 {
file = os.args[1]
fn main() {
mut files := []string{}
if os.args.len > 1 {
files << os.args[1..]
}
mut a := &App{
files: files
}
a.tui = tui.init({
user_data: a
init_fn: init
frame_fn: frame
event_fn: event
capture_events: true
})
a.tui.run()
}
mut app := &App{
file: file
}
app.tui = tui.init({
user_data: app
init_fn: init
frame_fn: frame
event_fn: event
capture_events: true
})
app.tui.run()

11
vlib/term/ui/termios_nix.c.v
View File

@ -53,7 +53,7 @@ fn restore_terminal_state() {
fn (mut ctx Context) termios_setup() {
// store the current title, so restore_terminal_state can get it back
ctx.save_title()
mut termios := get_termios()
if ctx.cfg.capture_events {
@ -205,8 +205,8 @@ fn single_char(buf string) &Event {
// The bit `or`s here are really just `+`'s, just written in this way for a tiny performance improvement
// 10 == `\n` == enter, don't treat it as ctrl + j
1 ... 9, 11 ... 26 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(96 | ch), modifiers: ctrl } }
// don't treat tab, enter as ctrl+i, ctrl+j
1 ... 8, 11 ... 26 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(96 | ch), modifiers: ctrl } }
65 ... 90 { event = &Event{ typ: event.typ, ascii: event.ascii, utf8: event.utf8, code: KeyCode(32 | ch), modifiers: shift } }
else {}
@ -343,6 +343,11 @@ fn escape_sequence(buf_ string) (&Event, int) {
else {}
}
if buf == '[Z' {
code = .tab
modifiers |= shift
}
if buf.len == 5 && buf[0] == `[` && buf[1].is_digit() && buf[2] == `;` {
// code = KeyCode(buf[4] + 197)
modifiers = match buf[3] {