122 lines
2.9 KiB
Rust
122 lines
2.9 KiB
Rust
extern crate unicode_segmentation;
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use std::io::Write;
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use termion::{clear, cursor, color};
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use termion::raw::RawTerminal;
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use crate::layout::Layout;
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use unicode_segmentation::UnicodeSegmentation;
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const PROMPT: &str = "Add alarm: ";
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// Input buffer.
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pub struct Buffer {
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content: String,
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// Used for error messages.
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message: Option<&'static str>,
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pub visible: bool,
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}
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impl Buffer {
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pub fn new() -> Buffer {
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Buffer {
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content: String::new(),
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message: None,
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visible: false,
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}
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}
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// Return reference to buffer content.
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pub fn read(&mut self) -> &String {
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&self.content
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}
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// Append char to buffer.
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pub fn push(&mut self, value: char) {
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// Reset error message.
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self.message = None;
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self.content.push(value);
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}
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// Remove last char.
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pub fn strip_char(&mut self) {
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// Reset error message.
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self.message = None;
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self.content.pop();
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}
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// Remove last word.
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pub fn strip_word(&mut self) {
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// Reset error message.
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self.message = None;
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let iter = UnicodeSegmentation::split_word_bound_indices(
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self.content.as_str().trim_end());
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if let Some((index, _)) = iter.last() {
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self.content.truncate(index);
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}
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}
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pub fn is_empty(&self) -> bool {
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self.content.is_empty()
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}
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// Clear input.
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pub fn clear(&mut self) {
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self.content.clear();
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}
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// Clear input and message.
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pub fn reset(&mut self) {
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self.message = None;
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self.clear();
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}
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// Draw input buffer.
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pub fn draw<W: Write>(
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&self,
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stdout: &mut RawTerminal<W>,
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layout: &mut Layout,
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) -> Result<(), std::io::Error>
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{
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// Write error message if present and return.
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if let Some(msg) = self.message {
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write!(stdout,
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"{}{}{}{}{}{}{}",
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cursor::Hide,
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cursor::Goto( layout.buffer.col, layout.buffer.line),
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clear::CurrentLine,
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PROMPT,
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color::Fg(color::LightRed),
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&msg,
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color::Fg(color::Reset))?;
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return Ok(());
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}
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if !self.content.is_empty() {
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write!(stdout,
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"{}{}{}{}{}",
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cursor::Goto(layout.buffer.col, layout.buffer.line),
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clear::CurrentLine,
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PROMPT,
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cursor::Show,
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&self.content)?;
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} else {
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// Clear buffer display.
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write!(stdout,
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"{}{}{}",
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cursor::Goto(layout.buffer.col, layout.buffer.line),
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clear::CurrentLine,
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cursor::Hide)?;
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}
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Ok(())
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}
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// Draw error message at input buffer position.
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pub fn message(
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&mut self,
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msg: &'static str,
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) {
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self.message = Some(msg);
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}
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}
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