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use {
super::*,
crate::*,
crate::crossterm::{
cursor,
event::{
Event,
KeyCode,
KeyEvent,
KeyModifiers,
MouseButton,
MouseEvent,
MouseEventKind,
},
queue,
style::{
Attribute,
Color,
SetBackgroundColor,
},
},
std::io::Write,
};
pub struct InputField {
content: InputFieldContent,
area: Area,
focused_style: CompoundStyle,
unfocused_style: CompoundStyle,
cursor_style: CompoundStyle,
pub password_mode: bool,
focused: bool,
scroll: Pos,
new_line_keys: Vec<KeyEvent>,
}
impl Default for InputField {
fn default() -> Self {
Self::new(Area::uninitialized())
}
}
macro_rules! wrap_content_fun {
($fun:ident) => {
pub fn $fun(&mut self) -> bool {
if self.content.$fun() {
self.fix_scroll();
true
} else {
false
}
}
};
}
impl InputField {
pub const ENTER: KeyEvent = KeyEvent {
code: KeyCode::Enter,
modifiers: KeyModifiers::NONE,
};
pub const ALT_ENTER: KeyEvent = KeyEvent {
code: KeyCode::Enter,
modifiers: KeyModifiers::ALT,
};
pub fn new(area: Area) -> Self {
let focused_style = CompoundStyle::default();
let unfocused_style = CompoundStyle::default();
let mut cursor_style = focused_style.clone();
cursor_style.add_attr(Attribute::Reverse);
Self {
content: InputFieldContent::default(),
area,
focused_style,
unfocused_style,
cursor_style,
password_mode: false,
focused: true,
scroll: Pos::default(),
new_line_keys: Vec::default(),
}
}
pub fn set_mono_line(&mut self) {
self.new_line_keys.clear();
}
pub fn new_line_on(&mut self, key: KeyEvent) {
self.new_line_keys.push(key);
}
pub fn change_area(&mut self, x: u16, y: u16, w: u16) {
if self.area.left != x || self.area.top != y || self.area.width != w {
self.area.left = x;
self.area.top = y;
self.area.width = w;
self.fix_scroll();
}
}
pub fn set_area(&mut self, area: Area) {
if self.area != area {
self.area = area;
self.fix_scroll();
}
}
pub const fn area(&self) -> &Area {
&self.area
}
pub const fn scroll(&self) -> Pos {
self.scroll
}
pub fn set_focus(&mut self, b: bool) {
if self.focused == b {
return;
}
self.focused = b;
if self.focused {
self.fix_scroll();
}
}
pub const fn focused(&self) -> bool {
self.focused
}
pub fn set_normal_style(&mut self, style: CompoundStyle) {
self.focused_style = style;
self.cursor_style = self.focused_style.clone();
self.cursor_style.add_attr(Attribute::Reverse);
}
pub fn set_unfocused_style(&mut self, style: CompoundStyle) {
self.unfocused_style = style;
}
pub const fn content(&self) -> &InputFieldContent {
&self.content
}
pub fn get_content(&self) -> String {
self.content.to_string()
}
pub fn is_empty(&self) -> bool {
self.content.is_empty()
}
pub fn copy_selection(&mut self) -> String {
self.content.selection_string()
}
pub fn cut_selection(&mut self) -> String {
let s = self.content.selection_string();
self.content.del_selection();
self.fix_scroll();
s
}
pub fn replace_selection<S: AsRef<str>>(&mut self, s: S) {
if self.content.has_wide_selection() {
self.content.del_selection();
}
self.content.insert_str(s);
self.fix_scroll();
}
pub fn is_content(&self, s: &str) -> bool {
self.content.is_str(s)
}
pub fn set_str<S: AsRef<str>>(&mut self, s: S) {
self.content.set_str(s);
self.fix_scroll();
}
pub fn insert_new_line(&mut self) -> bool {
self.content.insert_new_line();
self.fix_scroll();
true
}
pub fn put_char(&mut self, c: char) -> bool {
self.content.insert_char(c);
self.fix_scroll();
true
}
pub fn clear(&mut self) {
self.content.clear();
self.fix_scroll();
}
pub fn insert_str<S: AsRef<str>>(&mut self, s: S) {
self.content.insert_str(s);
self.fix_scroll();
}
wrap_content_fun!(move_up);
wrap_content_fun!(move_down);
wrap_content_fun!(move_left);
wrap_content_fun!(move_right);
wrap_content_fun!(move_to_start);
wrap_content_fun!(move_to_end);
wrap_content_fun!(move_to_line_start);
wrap_content_fun!(move_to_line_end);
wrap_content_fun!(move_word_left);
wrap_content_fun!(move_word_right);
wrap_content_fun!(del_char_below);
wrap_content_fun!(del_selection);
wrap_content_fun!(del_char_left);
wrap_content_fun!(del_word_left);
wrap_content_fun!(del_word_right);
wrap_content_fun!(move_current_line_up);
wrap_content_fun!(move_current_line_down);
wrap_content_fun!(select_word_around);
pub fn page_up(&mut self) -> bool {
if self.content.move_lines_up(self.area.height as usize) {
self.fix_scroll();
true
} else {
false
}
}
pub fn page_down(&mut self) -> bool {
if self.content.move_lines_down(self.area.height as usize) {
self.fix_scroll();
true
} else {
false
}
}
pub fn apply_key_event(&mut self, key: KeyEvent) -> bool {
if !self.focused {
return false;
}
if self.new_line_keys.contains(&key) {
self.insert_new_line();
return true;
}
use crate::crossterm::event::{
KeyModifiers as Mod,
};
match (key.code, key.modifiers) {
(code, Mod::NONE) => self.apply_keycode_event(code, false),
(code, Mod::SHIFT) => self.apply_keycode_event(code, true),
_ => false,
}
}
pub fn apply_keycode_event(
&mut self,
code: KeyCode,
shift: bool,
) -> bool {
if code == KeyCode::Backspace {
if self.content.has_wide_selection() {
self.content.del_selection();
true
} else {
self.content.del_char_left()
}
} else if code == KeyCode::Delete {
if self.content.has_wide_selection() {
self.content.del_selection();
true
} else {
self.content.del_char_below()
}
} else {
if shift {
self.content.make_selection();
} else {
self.content.unselect();
}
match code {
KeyCode::Home => self.move_to_line_start(),
KeyCode::End => self.move_to_line_end(),
KeyCode::Char(c) => self.put_char(c),
KeyCode::Up => self.move_up(),
KeyCode::Down => self.move_down(),
KeyCode::Left => self.move_left(),
KeyCode::PageUp => self.page_up(),
KeyCode::PageDown => self.page_down(),
KeyCode::Right => self.move_right(),
_ => false,
}
}
}
pub fn apply_click_event(&mut self, x: u16, y: u16) -> bool {
if self.area.contains(x, y) {
if self.focused {
let y = ((y - self.area.top) as usize + self.scroll.y)
.min(self.content.line_count()-1);
let line = &self.content.lines()[y];
let x = line
.col_to_char_idx((x - self.area.left) as usize + self.scroll.x)
.unwrap_or(line.chars.len());
self.content.set_cursor_pos(Pos { x, y });
} else {
self.focused = true;
}
true
} else {
false
}
}
pub fn apply_mouse_event(
&mut self,
mouse_event: MouseEvent,
is_double_click: bool,
) -> bool {
let MouseEvent { kind, column, row, modifiers } = mouse_event;
if self.area.contains(column, row) {
if self.focused {
let y = ((row - self.area.top) as usize + self.scroll.y)
.min(self.content.line_count()-1);
let line = &self.content.lines()[y];
let x = line
.col_to_char_idx((column - self.area.left) as usize + self.scroll.x)
.unwrap_or(line.chars.len());
match kind {
MouseEventKind::Down(MouseButton::Left) => {
if modifiers == KeyModifiers::SHIFT {
self.content.make_selection();
} else {
self.content.unselect();
}
self.content.set_cursor_pos(Pos { x, y });
}
MouseEventKind::Up(MouseButton::Left) if is_double_click => {
self.content.set_cursor_pos(Pos { x, y });
self.content.select_word_around();
}
MouseEventKind::Drag(MouseButton::Left) => {
self.content.make_selection();
self.content.set_cursor_pos(Pos { x, y });
}
MouseEventKind::ScrollDown => {
self.scroll_down();
}
MouseEventKind::ScrollUp => {
self.scroll_up();
}
_ => {}
}
} else if matches!(kind, MouseEventKind::Down(MouseButton::Left)) {
self.focused = true;
}
true
} else {
false
}
}
pub fn apply_event(&mut self, event: Event, is_double_click: bool) -> bool {
match event {
Event::Mouse(mouse_event) => {
self.apply_mouse_event(mouse_event, is_double_click)
}
Event::Key(KeyEvent{code, modifiers}) if self.focused => {
if modifiers.is_empty() {
self.apply_keycode_event(code, false)
} else if modifiers == KeyModifiers::SHIFT {
self.apply_keycode_event(code, true)
} else {
false
}
}
_ => false,
}
}
pub fn apply_timed_event(&mut self, event: TimedEvent) -> bool {
self.apply_event(event.event, event.double_click)
}
pub fn scroll_up(&mut self) -> bool {
if self.scroll.y > 0 {
self.scroll.y -= 1;
true
} else {
false
}
}
pub fn scroll_down(&mut self) -> bool {
let height = self.area.height as usize;
let lines_len = self.content.line_count();
if self.scroll.y + height < lines_len {
self.scroll.y += 1;
true
} else {
false
}
}
fn fix_scroll(&mut self) {
let mut width = self.area.width as usize;
let height = self.area.height as usize;
let lines = &self.content.lines();
let has_y_scroll = lines.len() > height;
if has_y_scroll {
width -= 1;
} else {
self.scroll.y = 0;
}
let pos = self.content.cursor_pos();
if has_y_scroll {
if self.scroll.y + height > lines.len() {
self.scroll.y = lines.len() - height;
}
if self.focused {
if self.scroll.y > pos.y {
self.scroll.y = pos.y;
if self.scroll.y > 0 && height > 4 {
self.scroll.y -= 1;
}
} else if pos.y >= self.scroll.y + height {
self.scroll.y = pos.y - height + 1;
if pos.y + 1 < lines.len() {
self.scroll.y -= 1;
}
}
}
}
let line = self.content.current_line();
let line_width = line.width();
if line_width < width {
self.scroll.x = 0;
} else {
if self.focused {
if width < 4 {
if pos.x < 2 {
self.scroll.x = 0;
} else if pos.x < self.scroll.x + 1 {
self.scroll.x = pos.x - 1;
} else if pos.x > self.scroll.x + width {
self.scroll.x = pos.x + 1 - width;
}
} else {
let wpx = line.char_idx_to_col(pos.x);
if wpx < self.scroll.x + 2 {
if wpx < 2 {
self.scroll.x = 0;
} else {
self.scroll.x = wpx - 2;
}
} else if wpx > self.scroll.x + width - 2 {
self.scroll.x = wpx + 2 - width;
}
}
}
if self.scroll.x + width > line_width + 1 {
self.scroll.x = line_width + 1 - width;
}
}
}
pub fn display_on<W: Write>(&self, w: &mut W) -> Result<(), Error> {
let normal_style = if self.focused {
&self.focused_style
} else {
&self.unfocused_style
};
let mut width = self.area.width as usize;
let pos = self.content.cursor_pos();
let scrollbar = self.area.scrollbar(
self.scroll.y as u16,
self.content.line_count() as u16,
);
if scrollbar.is_some() {
width -= 1;
}
queue!(w, SetBackgroundColor(Color::Reset))?;
let mut scrollbar_style = &crate::get_default_skin().scrollbar;
let mut focused_scrollbar_style;
if self.focused {
if let Some(bg) = self.focused_style.get_bg() {
focused_scrollbar_style = scrollbar_style.clone();
focused_scrollbar_style.set_bg(bg);
scrollbar_style = &focused_scrollbar_style;
}
}
let mut numbered_lines = self.content.lines().iter()
.map(|line| &line.chars)
.enumerate()
.skip(self.scroll.y);
let selection = self.content.selection();
for j in 0..self.area.height {
queue!(w, cursor::MoveTo(self.area.left, j + self.area.top))?;
if let Some((y, chars)) = numbered_lines.next() {
let cursor_at_end = self.focused && y == pos.y && pos.x == chars.len();
let mut width_to_skip = self.scroll.x;
let mut skipped_width = 0;
let mut displayed_width = 0;
let mut width = width; if width_to_skip > 0 && width > 4 {
normal_style.queue(w, fit::ELLIPSIS)?;
width_to_skip += 1;
width -= 1;
}
for (i, c) in chars.iter().enumerate() {
let c = if self.password_mode { '*' } else { *c };
let char_width = InputFieldContent::char_width(c);
if skipped_width < width_to_skip {
skipped_width += char_width;
continue;
}
if displayed_width + char_width >= width {
let is_last = i == chars.len() - 1;
if !is_last || displayed_width + char_width > width {
if self.focused && selection.contains(i, y) {
self.cursor_style.queue(w, fit::ELLIPSIS)?;
} else {
normal_style.queue(w, fit::ELLIPSIS)?;
}
displayed_width += 1;
break;
}
}
if self.focused && selection.contains(i, y) {
self.cursor_style.queue(w, c)?;
} else {
normal_style.queue(w, c)?;
}
displayed_width += char_width;
if displayed_width >= width {
break;
}
}
if displayed_width < width && cursor_at_end {
self.cursor_style.queue(w, ' ')?;
displayed_width += 1;
}
while displayed_width < width {
normal_style.queue(w, ' ')?;
displayed_width += 1;
}
} else {
SPACE_FILLING.queue_styled(w, normal_style, width)?;
}
if let Some((sctop, scbottom)) = scrollbar {
let y = j + self.area.top;
if sctop <= y && y <= scbottom {
scrollbar_style.thumb.queue(w)?;
} else {
scrollbar_style.track.queue(w)?;
}
}
}
Ok(())
}
pub fn display(&self) -> Result<(), Error> {
let mut w = std::io::stdout();
self.display_on(&mut w)?;
w.flush()?;
Ok(())
}
}