root
5cab38a27c
- Remove serde_yaml and tokio from Cargo.toml (unused) - Add #[allow(dead_code)] to utility code kept for future use (CUT_FULL, ALIGN_RIGHT, line(), PrinterError, SupabaseError, atualizar_sync, remover, Lock variant) - Zero compiler warnings on release build
99 lines
3.0 KiB
Rust
99 lines
3.0 KiB
Rust
//! Comandos ESC/POS para impressoras térmicas 80mm
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//! Comandos Epson ESC/POS padrão — funciona com TM-T20 e compatíveis.
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/// Inicializar impressora
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pub const INIT: &[u8] = b"\x1B\x40";
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/// Nova linha
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pub const LF: &[u8] = b"\x0A";
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/// Cortar papel (parcial)
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pub const CUT: &[u8] = b"\x1D\x56\x01";
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/// Cortar papel (total)
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#[allow(dead_code)]
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pub const CUT_FULL: &[u8] = b"\x1D\x56\x00";
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/// Alimentar 3 linhas antes de cortar
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pub const FEED_CUT: &[u8] = b"\x1B\x64\x03";
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/// Negrito ON / OFF
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pub const BOLD_ON: &[u8] = b"\x1B\x45\x01";
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pub const BOLD_OFF: &[u8] = b"\x1B\x45\x00";
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/// Alinhamento
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pub const ALIGN_LEFT: &[u8] = b"\x1B\x61\x00";
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pub const ALIGN_CENTER: &[u8] = b"\x1B\x61\x01";
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#[allow(dead_code)]
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pub const ALIGN_RIGHT: &[u8] = b"\x1B\x61\x02";
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/// Fonte normal / dupla
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pub const FONT_NORMAL: &[u8] = b"\x1B\x21\x00";
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pub const FONT_DOUBLE: &[u8] = b"\x1B\x21\x30";
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/// Linha divisória (48 colunas para 80mm)
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pub const DIVIDER: &str = "--------------------------------";
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/// Monta texto centralizado com negrito + fonte dupla
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pub fn title(text: &str) -> Vec<u8> {
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let mut out = Vec::new();
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out.extend_from_slice(ALIGN_CENTER);
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out.extend_from_slice(BOLD_ON);
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out.extend_from_slice(FONT_DOUBLE);
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out.extend_from_slice(text.as_bytes());
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out.extend_from_slice(LF);
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out.extend_from_slice(FONT_NORMAL);
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out.extend_from_slice(BOLD_OFF);
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out
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}
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/// Monta linha normal (alinhada à esquerda)
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#[allow(dead_code)]
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pub fn line(text: &str) -> Vec<u8> {
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let mut out = Vec::new();
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out.extend_from_slice(ALIGN_LEFT);
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out.extend_from_slice(text.as_bytes());
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out.extend_from_slice(LF);
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out
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}
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/// Monta linha centralizada
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pub fn line_center(text: &str) -> Vec<u8> {
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let mut out = Vec::new();
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out.extend_from_slice(ALIGN_CENTER);
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out.extend_from_slice(text.as_bytes());
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out.extend_from_slice(LF);
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out
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}
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/// Monta linha em negrito
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pub fn line_bold(text: &str) -> Vec<u8> {
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let mut out = Vec::new();
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out.extend_from_slice(BOLD_ON);
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out.extend_from_slice(ALIGN_LEFT);
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out.extend_from_slice(text.as_bytes());
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out.extend_from_slice(LF);
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out.extend_from_slice(BOLD_OFF);
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out
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}
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/// Monta linha com chave-valor alinhado (label 14 chars + espaço + valor 14 chars)
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pub fn kv(label: &str, value: &str) -> Vec<u8> {
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let padded_label = format!("{:<14}", label);
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let padded_value = format!("{:>14}", value);
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let line = format!("{} {}", padded_label, padded_value);
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let line = if line.len() > 48 { line[..48].to_string() } else { line };
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let mut out = Vec::new();
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out.extend_from_slice(ALIGN_LEFT);
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out.extend_from_slice(line.as_bytes());
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out.extend_from_slice(LF);
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out
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}
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/// Monta linha divisória
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pub fn divider() -> Vec<u8> {
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let mut out = Vec::new();
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out.extend_from_slice(ALIGN_LEFT);
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out.extend_from_slice(DIVIDER.as_bytes());
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out.extend_from_slice(LF);
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out
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}
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/// Monta espaço em branco (N linhas)
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pub fn blank_lines(n: u8) -> &'static [u8] {
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const BLANK: &[u8] = b"\n\n\n\n\n\n\n\n";
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&BLANK[..(n as usize).min(8)]
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}
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