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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| use crate::gfx::{get_rgba, render_image}; | ||
| use crate::PLS; | ||
| use std::path::PathBuf; | ||
|
|
||
| /// This enum contains the two formats of icons supported by `pls`. | ||
| pub enum Icon { | ||
| /// a Nerd Font or emoji icon | ||
| Text(String), | ||
| /// the path to an SVG icon | ||
| Image(String), | ||
| } | ||
|
|
||
| impl From<&str> for Icon { | ||
| fn from(s: &str) -> Self { | ||
| if s.ends_with(".svg") { | ||
| Icon::Image(s.to_string()) | ||
| } else { | ||
| Icon::Text(s.to_string()) | ||
| } | ||
| } | ||
| } | ||
|
|
||
| impl Icon { | ||
| /// Get the size of the icon in pixels. | ||
| /// | ||
| /// The icon size is determined by the width of a cell in the terminal | ||
| /// multiplied by a scaling factor. | ||
| pub fn size() -> u8 { | ||
| let scale = std::env::var("PLS_ICON_SCALE") | ||
| .ok() | ||
| .and_then(|string| string.parse().ok()) | ||
| .unwrap_or(1.0f32) | ||
| .min(2.0); // We only allocate two cells for an icon. | ||
|
|
||
| return (scale * PLS.window.as_ref().unwrap().cell_width() as f32) // Convert to px.s | ||
| .round() as u8; | ||
| } | ||
|
|
||
| /// Get the output of the icon using the appropriate method: | ||
| /// | ||
| /// * For text icons, it generates the markup string with the | ||
| /// directives. | ||
| /// * For image icons, it generates the Kitty terminal graphics APC | ||
| /// sequence. If that fails, it falls back to a blank text icon. | ||
| /// | ||
| /// The formatting directives for textual icons are a subset of the | ||
| /// formatting directives for text. | ||
| /// | ||
| /// # Arguments | ||
| /// | ||
| /// * `directives` - the formatting directives to apply to text | ||
| pub fn render(&self, text_directives: &str) -> String { | ||
| match self { | ||
| Icon::Text(text) => { | ||
| // Nerd Font icons look weird with underlines and | ||
| // synthesised italics. | ||
| let directives = text_directives | ||
| .replace("underline", "") | ||
| .replace("italic", ""); | ||
| // We leave a space after the icon to allow Nerd Font | ||
| // icons that are slightly bigger than one cell to be | ||
| // displayed correctly. | ||
| format!("<{directives}>{text:<1} </>") | ||
| } | ||
|
|
||
| Icon::Image(path) => { | ||
| // SVG icons support expanding environment variables in | ||
| // the path for theming purposes. | ||
| if let Ok(path) = shellexpand::env(path) { | ||
| let size = Icon::size(); | ||
| if let Some(rgba_data) = get_rgba(&PathBuf::from(path.as_ref()), size) { | ||
| return render_image(&rgba_data, size); | ||
| } | ||
| } | ||
| // This would be exactly as if the node had no icon. | ||
| Icon::Text(String::default()).render(text_directives) | ||
| } | ||
| } | ||
| } | ||
| } |
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