Screenshot feature (text + PNG) and keybind editor tab in settings
- New screenshot action (default alt+p, bindable like any action): renders the current workspace to a buffer and saves it as plain text and/or PNG (screenshot_format = text|png|both, screenshot_dir configurable, default skärmbilder/ under the config dir). The PNG is rasterized cell by cell with an embedded DejaVu Sans Mono font (vendored, ~340 kB); glyphs missing from the font (color emoji) render as filled boxes. A popup confirms the saved paths - Settings dialog gains a 'Tangenter' row: lists all keybinds with label and scope, Enter captures the next keypress as the new chord (persisted by rewriting [[keybind]] via toml_edit), Delete removes a binding — changes take effect immediately - Integration suite: 48/48 (screenshot files + validity, keybind list, live rebind ctrl+space→alt+z) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
221
src/screenshot.rs
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221
src/screenshot.rs
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//! Skärmbild av arbetsytan: sparar den compositerade skärmen som
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//! textfil och/eller PNG.
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//!
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//! Texten är en ren avskrift av cellernas symboler. PNG:n rasteriseras
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//! cell för cell med den inbäddade DejaVu Sans Mono-fonten: bakgrunds-
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//! rektangel + glyf i förgrundsfärgen. Glyfer som saknas i fonten
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//! (t.ex. färgemoji) ritas som en fylld ruta i förgrundsfärgen.
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use ratatui::buffer::Buffer;
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use ratatui::style::Color;
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use std::path::PathBuf;
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const FONT_BYTES: &[u8] = include_bytes!("../assets/DejaVuSansMono.ttf");
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const CELL_W: u32 = 10;
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const CELL_H: u32 = 20;
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const FONT_PX: f32 = 17.0;
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/// Resultatet av en sparad skärmbild.
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pub struct Saved {
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pub text_path: Option<PathBuf>,
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pub png_path: Option<PathBuf>,
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}
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/// Spara `buf` till `dir` som text och/eller PNG beroende på `format`
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/// ("text", "png" eller "both"). Returnerar sökvägarna som skrevs.
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pub fn save(buf: &Buffer, dir: &str, format: &str, stamp: &str) -> std::io::Result<Saved> {
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std::fs::create_dir_all(dir)?;
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let base = PathBuf::from(dir).join(format!("tui-wm-{}", stamp));
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let mut saved = Saved { text_path: None, png_path: None };
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if format == "text" || format == "both" {
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let path = base.with_extension("txt");
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std::fs::write(&path, buffer_to_text(buf))?;
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saved.text_path = Some(path);
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}
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if format == "png" || format == "both" {
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let path = base.with_extension("png");
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buffer_to_png(buf, &path)
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.map_err(|e| std::io::Error::other(format!("PNG: {}", e)))?;
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saved.png_path = Some(path);
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}
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Ok(saved)
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}
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/// Ren text: cellsymboler rad för rad (celler som täcks av ett brett
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/// tecken hoppas över, precis som i ANSI-serialiseringen).
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fn buffer_to_text(buf: &Buffer) -> String {
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let area = buf.area;
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let mut out = String::with_capacity((area.width as usize + 1) * area.height as usize);
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for row in 0..area.height {
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let mut skip = 0u16;
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for col in 0..area.width {
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if skip > 0 {
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skip -= 1;
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continue;
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}
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let cell = &buf.content[(row * area.width + col) as usize];
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let sym = cell.symbol();
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let w = unicode_width::UnicodeWidthStr::width(sym);
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if w > 1 {
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skip = (w as u16).saturating_sub(1);
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}
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out.push_str(if sym.is_empty() { " " } else { sym });
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}
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// trimma högerkantens mellanslag
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while out.ends_with(' ') {
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out.pop();
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}
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out.push('\n');
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}
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out
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}
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/// Standardpalett för ratatui-färger → RGB.
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fn color_rgb(c: Color, is_fg: bool) -> [u8; 3] {
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match c {
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Color::Reset => {
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if is_fg { [220, 220, 220] } else { [30, 30, 40] }
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}
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Color::Black => [0, 0, 0],
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Color::Red => [205, 49, 49],
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Color::Green => [13, 188, 121],
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Color::Yellow => [229, 229, 16],
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Color::Blue => [36, 114, 200],
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Color::Magenta => [188, 63, 188],
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Color::Cyan => [17, 168, 205],
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Color::Gray => [229, 229, 229],
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Color::DarkGray => [102, 102, 102],
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Color::LightRed => [241, 76, 76],
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Color::LightGreen => [35, 209, 139],
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Color::LightYellow => [245, 245, 67],
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Color::LightBlue => [59, 142, 234],
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Color::LightMagenta => [214, 112, 214],
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Color::LightCyan => [41, 184, 219],
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Color::White => [255, 255, 255],
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Color::Rgb(r, g, b) => [r, g, b],
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Color::Indexed(i) => xterm256(i),
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}
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}
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/// xterm-256-palettens standardvärden.
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fn xterm256(i: u8) -> [u8; 3] {
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match i {
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0..=15 => {
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const BASE: [[u8; 3]; 16] = [
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[0, 0, 0], [205, 49, 49], [13, 188, 121], [229, 229, 16],
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[36, 114, 200], [188, 63, 188], [17, 168, 205], [229, 229, 229],
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[102, 102, 102], [241, 76, 76], [35, 209, 139], [245, 245, 67],
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[59, 142, 234], [214, 112, 214], [41, 184, 219], [255, 255, 255],
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];
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BASE[i as usize]
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}
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16..=231 => {
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let n = i - 16;
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let steps = [0u8, 95, 135, 175, 215, 255];
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[
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steps[(n / 36) as usize],
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steps[((n % 36) / 6) as usize],
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steps[(n % 6) as usize],
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]
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}
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232..=255 => {
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let v = 8 + (i - 232) * 10;
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[v, v, v]
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}
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}
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}
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fn buffer_to_png(buf: &Buffer, path: &std::path::Path) -> Result<(), String> {
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use ratatui::style::Modifier;
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let font = fontdue::Font::from_bytes(FONT_BYTES, fontdue::FontSettings::default())
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.map_err(|e| e.to_string())?;
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let area = buf.area;
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let img_w = area.width as u32 * CELL_W;
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let img_h = area.height as u32 * CELL_H;
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let mut img = image::RgbImage::new(img_w, img_h);
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for row in 0..area.height {
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let mut skip = 0u16;
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for col in 0..area.width {
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if skip > 0 {
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skip -= 1;
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continue;
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}
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let cell = &buf.content[(row * area.width + col) as usize];
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let sym = cell.symbol();
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let cw = unicode_width::UnicodeWidthStr::width(sym).max(1);
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if cw > 1 {
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skip = (cw as u16) - 1;
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}
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let (mut fg, mut bg) = (
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color_rgb(cell.fg, true),
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color_rgb(cell.bg, false),
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);
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if cell.modifier.contains(Modifier::REVERSED) {
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std::mem::swap(&mut fg, &mut bg);
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}
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if cell.modifier.contains(Modifier::DIM) {
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fg = [fg[0] / 2, fg[1] / 2, fg[2] / 2];
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}
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let x0 = col as u32 * CELL_W;
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let y0 = row as u32 * CELL_H;
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let cell_px_w = CELL_W * cw as u32;
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// Bakgrund
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for y in y0..(y0 + CELL_H).min(img_h) {
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for x in x0..(x0 + cell_px_w).min(img_w) {
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img.put_pixel(x, y, image::Rgb(bg));
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}
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}
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// Glyf
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let ch = sym.chars().next().unwrap_or(' ');
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if ch == ' ' {
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continue;
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}
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if font.lookup_glyph_index(ch) != 0 {
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let (metrics, bitmap) = font.rasterize(ch, FONT_PX);
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// Baslinje ungefär 4 px över cellens botten
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let gx = x0 as i64 + metrics.xmin as i64
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+ ((cell_px_w as i64 - metrics.width as i64) / 2).max(0);
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let gy = y0 as i64 + (CELL_H as i64 - 4) - metrics.height as i64
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- metrics.ymin as i64;
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for by in 0..metrics.height {
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for bx in 0..metrics.width {
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let a = bitmap[by * metrics.width + bx] as u32;
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if a == 0 {
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continue;
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}
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let px = gx + bx as i64;
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let py = gy + by as i64;
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if px < 0 || py < 0 || px as u32 >= img_w || py as u32 >= img_h {
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continue;
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}
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let old = img.get_pixel(px as u32, py as u32).0;
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let blend = |o: u8, f: u8| {
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((o as u32 * (255 - a) + f as u32 * a) / 255) as u8
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};
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img.put_pixel(
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px as u32,
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py as u32,
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image::Rgb([
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blend(old[0], fg[0]),
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blend(old[1], fg[1]),
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blend(old[2], fg[2]),
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]),
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);
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}
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}
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} else {
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// Glyf saknas (t.ex. emoji): fylld ruta med marginal
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for y in (y0 + 3)..(y0 + CELL_H - 3).min(img_h) {
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for x in (x0 + 2)..(x0 + cell_px_w - 2).min(img_w) {
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img.put_pixel(x, y, image::Rgb(fg));
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}
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}
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}
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}
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}
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img.save(path).map_err(|e| e.to_string())
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}
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