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use {
super::*,
crate::{
app::*,
display::W,
errors::ProgramError,
keys,
skin::PanelSkin,
verb::*,
},
crossterm::{
cursor,
event::KeyEvent,
queue,
},
termimad::{Area, Event, InputField},
};
/// wrap the input of a panel,
/// receive events and make commands
pub struct PanelInput {
pub input_field: InputField,
tab_cycle_count: usize,
input_before_cycle: Option<String>,
}
impl PanelInput {
pub fn new(area: Area) -> Self {
Self {
input_field: InputField::new(area),
tab_cycle_count: 0,
input_before_cycle: None,
}
}
pub fn set_content(&mut self, content: &str) {
self.input_field.set_content(content);
}
pub fn get_content(&self) -> String {
self.input_field.get_content()
}
pub fn display(
&mut self,
w: &mut W,
active: bool,
mode: Mode,
mut area: Area,
panel_skin: &PanelSkin,
) -> Result<(), ProgramError> {
self.input_field.set_normal_style(panel_skin.styles.input.clone());
self.input_field.focused = active && mode == Mode::Input;
if mode == Mode::Command && active {
queue!(w, cursor::MoveTo(area.left, area.top))?;
panel_skin.styles.mode_command_mark.queue_str(w, "C")?;
area.width -= 1;
area.left += 1;
}
self.input_field.area = area;
self.input_field.display_on(w)?;
Ok(())
}
/// consume the event to
/// - maybe change the input
/// - build a command
/// then redraw the input field
pub fn on_event(
&mut self,
w: &mut W,
event: Event,
con: &AppContext,
sel_info: SelInfo<'_>,
app_state: &AppState,
mode: Mode,
) -> Result<Command, ProgramError> {
let cmd = self.get_command(event, con, sel_info, app_state, mode);
self.input_field.display_on(w)?;
Ok(cmd)
}
/// check whether the verb is an action on the input (like
/// deleting a word) and if it's the case, applies it and
/// return true
fn handle_input_related_verb(
&mut self,
verb: &Verb,
_con: &AppContext,
) -> bool {
if let VerbExecution::Internal(internal_exec) = &verb.execution {
match internal_exec.internal {
Internal::input_clear => {
if self.input_field.get_content().is_empty() {
false
} else {
self.input_field.set_content("");
true
}
}
Internal::input_del_char_left => self.input_field.del_char_left(),
Internal::input_del_char_below => self.input_field.del_char_below(),
Internal::input_del_word_left => self.input_field.del_word_left(),
Internal::input_del_word_right => self.input_field.del_word_right(),
Internal::input_go_left => self.input_field.move_left(),
Internal::input_go_right => self.input_field.move_right(),
Internal::input_go_word_left => self.input_field.move_word_left(),
Internal::input_go_word_right => self.input_field.move_word_right(),
Internal::input_go_to_start => self.input_field.move_to_start(),
Internal::input_go_to_end => self.input_field.move_to_end(),
#[cfg(feature = "clipboard")]
Internal::input_paste => {
match terminal_clipboard::get_string() {
Ok(pasted) => {
for c in pasted
.chars()
.filter(|c| c.is_alphanumeric() || c.is_ascii_punctuation())
{
self.input_field.put_char(c);
}
}
Err(e) => {
warn!("Error in reading clipboard: {:?}", e);
}
}
true
}
_ => false,
}
} else {
false
}
}
/// when a key is used to enter input mode, we don't always
/// consume it. Sometimes it should be consumed, sometimes it
/// should be added to the input
fn enter_input_mode_with_key(
&mut self,
key: KeyEvent,
parts: &CommandParts,
) {
if let Some(c) = keys::as_letter(key) {
let add = match c {
// '/' if !parts.raw_pattern.is_empty() => true,
' ' if parts.verb_invocation.is_none() => true,
':' if parts.verb_invocation.is_none() => true,
_ => false,
};
if add {
self.input_field.put_char(c);
}
}
}
/// consume the event to
/// - maybe change the input
/// - build a command
fn get_command(
&mut self,
event: Event,
con: &AppContext,
sel_info: SelInfo<'_>,
app_state: &AppState,
mode: Mode,
) -> Command {
match event {
Event::Click(x, y, ..) => {
return if self.input_field.apply_event(&event) {
Command::empty()
} else {
Command::Click(x, y)
};
}
Event::DoubleClick(x, y) => {
return Command::DoubleClick(x, y);
}
Event::Key(key) => {
// value of raw and parts before any key related change
let raw = self.input_field.get_content();
let mut parts = CommandParts::from(raw.clone());
// we first handle the cases that MUST absolutely
// not be overriden by configuration
if key == keys::ESC {
// tab cycling
self.tab_cycle_count = 0;
if let Some(raw) = self.input_before_cycle.take() {
// we cancel the tab cycling
self.input_field.set_content(&raw);
self.input_before_cycle = None;
return Command::from_raw(raw, false);
} else if con.modal && mode == Mode::Input {
// leave insertion mode
return Command::Internal {
internal: Internal::mode_command,
input_invocation: None,
};
} else {
// general back command
self.input_field.set_content("");
let internal = Internal::back;
return Command::Internal {
internal,
input_invocation: parts.verb_invocation,
};
}
}
// tab completion
if key == keys::TAB {
if parts.verb_invocation.is_some() {
let parts_before_cycle;
let completable_parts = if let Some(s) = &self.input_before_cycle {
parts_before_cycle = CommandParts::from(s.clone());
&parts_before_cycle
} else {
&parts
};
let completions = Completions::for_input(completable_parts, con, sel_info);
info!(" -> completions: {:?}", &completions);
let added = match completions {
Completions::None => {
debug!("nothing to complete!");
self.tab_cycle_count = 0;
self.input_before_cycle = None;
None
}
Completions::Common(completion) => {
self.tab_cycle_count = 0;
Some(completion)
}
Completions::List(mut completions) => {
let idx = self.tab_cycle_count % completions.len();
if self.tab_cycle_count == 0 {
self.input_before_cycle = Some(raw.to_string());
}
self.tab_cycle_count += 1;
Some(completions.swap_remove(idx))
}
};
if let Some(added) = added {
let mut raw = self
.input_before_cycle
.as_ref()
.map_or(raw, |s| s.to_string());
raw.push_str(&added);
self.input_field.set_content(&raw);
return Command::from_raw(raw, false);
} else {
return Command::None;
}
}
} else {
self.tab_cycle_count = 0;
self.input_before_cycle = None;
}
if key == keys::ENTER && parts.verb_invocation.is_some() {
return Command::from_parts(parts, true);
}
if key == keys::QUESTION && (raw.is_empty() || parts.verb_invocation.is_some()) {
// a '?' opens the help when it's the first char
// or when it's part of the verb invocation
return Command::Internal {
internal: Internal::help,
input_invocation: parts.verb_invocation,
};
}
// we now check if the key is the trigger key of one of the verbs
if keys::is_key_allowed_in_mode(key, mode) {
for (index, verb) in con.verb_store.verbs.iter().enumerate() {
for verb_key in &verb.keys {
if *verb_key != key {
continue;
}
if self.handle_input_related_verb(verb, con) {
return Command::from_raw(self.input_field.get_content(), false);
}
if !verb.selection_condition.is_respected_by(sel_info.common_stype()) {
continue;
}
if mode != Mode::Input && verb.is_internal(Internal::mode_input) {
self.enter_input_mode_with_key(key, &parts);
}
if verb.auto_exec {
return Command::VerbTrigger {
index,
input_invocation: parts.verb_invocation,
};
}
if let Some(invocation_parser) = &verb.invocation_parser {
let exec_builder = ExecutionStringBuilder::without_invocation(
sel_info,
app_state,
);
let verb_invocation = exec_builder.invocation_with_default(
&invocation_parser.invocation_pattern
);
parts.verb_invocation = Some(verb_invocation);
self.set_content(&parts.to_string());
return Command::VerbEdit(parts.verb_invocation.unwrap());
}
}
}
}
if key == keys::LEFT && raw.is_empty() {
let internal = Internal::back;
return Command::Internal {
internal,
input_invocation: parts.verb_invocation,
};
}
if key == keys::RIGHT && raw.is_empty() {
return Command::Internal {
internal: Internal::open_stay,
input_invocation: None,
};
}
// input field management
if mode == Mode::Input {
if self.input_field.apply_event(&event) {
return Command::from_raw(self.input_field.get_content(), false);
}
}
}
Event::Wheel(lines_count) => {
let internal = if lines_count > 0 {
Internal::line_down_no_cycle
} else {
Internal::line_up_no_cycle
};
return Command::Internal {
internal,
input_invocation: None,
};
}
_ => {}
}
Command::None
}
}