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cosmic-conf: HyDE theme importer
import-theme translates a HyDE hypr.theme into cosmic.conf, reusing the Phase 1 parser — which is the payoff for choosing Hyprland-style syntax. Nothing is dropped silently. Every source key either lands in the output or carries a Note explaining why not, classified as NoEquivalent, NeedsCompositorPatch, DifferentProgram or Lossy. Gradient borders contribute their first stop as the accent and say so. Handles real-world quirks found in actual theme files: HyDE's |> destination header (no '=', would otherwise be a parse error), colon-keys like shadow:enabled, and nested blur blocks. Tests run against the verbatim Catppuccin-Mocha theme, and assert that the generated conf both parses and resolves against the registry. Verified end-to-end on Tokyo-Night, a theme absent from the tests: import -> apply produced 8 correct cosmic-config files with 20 settings reported. 64 tests.
This commit is contained in:
@@ -0,0 +1,487 @@
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//! HyDE `hypr.theme` -> `cosmic.conf`.
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//!
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//! One-way, and into the conf file rather than straight into cosmic-config, so
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//! the result is readable and editable before it touches the desktop.
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//!
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//! The guiding rule is that **nothing is dropped silently**. A HyDE theme
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//! contains a good deal that COSMIC has no equivalent for — gradient borders,
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//! blur tuning, layer rules — and a converter that quietly ignored them would
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//! leave the user wondering why their desktop looks wrong. Every unhandled key
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//! is reported with a reason.
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use crate::parser::{parse, Item, ParseError, Span};
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/// Why a source key did not make it into the output.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub enum Reason {
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/// COSMIC has no equivalent concept.
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NoEquivalent(&'static str),
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/// Needs a compositor patch that does not exist yet (spec Phase 2).
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NeedsCompositorPatch(&'static str),
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/// Belongs to another program entirely; copied verbatim, not translated.
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DifferentProgram(&'static str),
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/// Translated, but with a loss worth knowing about.
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Lossy(String),
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}
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impl Reason {
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pub fn describe(&self) -> String {
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match self {
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Reason::NoEquivalent(d) => format!("no COSMIC equivalent: {d}"),
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Reason::NeedsCompositorPatch(d) => format!("needs a cosmic-comp patch: {d}"),
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Reason::DifferentProgram(d) => format!("handled by another program: {d}"),
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Reason::Lossy(d) => format!("translated with loss: {d}"),
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}
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}
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}
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct Note {
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pub key: String,
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pub value: String,
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pub reason: Reason,
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pub span: Span,
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}
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#[derive(Debug, Default)]
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pub struct Import {
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/// Generated `cosmic.conf` text.
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pub conf: String,
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/// Everything that did not translate cleanly.
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pub notes: Vec<Note>,
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}
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impl Import {
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/// Keys that produced no output at all, as opposed to lossy translations.
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pub fn dropped(&self) -> impl Iterator<Item = &Note> {
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self.notes
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.iter()
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.filter(|n| !matches!(n.reason, Reason::Lossy(_)))
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}
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}
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/// HyDE prefixes each `.theme` file with a destination line such as
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/// `$HOME/.config/hypr/themes/theme.conf|> $HOME/.../colors.conf`.
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///
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/// It is metadata for HyDE's own installer, not config, and it has no `=`, so
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/// the parser would reject the file outright. Strip it before parsing.
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fn strip_hyde_header(src: &str) -> &str {
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let mut lines = src.lines();
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let Some(first) = lines.next() else {
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return src;
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};
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let is_destination_header = !first.contains('=') && (first.contains("|>") || first.contains('|'));
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if is_destination_header {
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// Preserve line numbering by keeping the newline count intact: callers
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// report spans against the stripped text, so re-add a blank line.
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match src.find('\n') {
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Some(i) => &src[i + 1..],
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None => "",
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}
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} else {
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src
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}
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}
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/// First colour of a possibly-gradient Hyprland border spec.
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/// `rgba(ca9ee6ff) rgba(f2d5cfff) 45deg` -> `ca9ee6`.
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fn first_color_rgb(value: &str) -> Option<String> {
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let token = value.split_whitespace().next()?;
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let inner = token
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.strip_prefix("rgba(")
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.or_else(|| token.strip_prefix("rgb("))?
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.strip_suffix(')')?;
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let hex = inner.trim_start_matches('#');
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if hex.len() >= 6 && hex[..6].chars().all(|c| c.is_ascii_hexdigit()) {
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Some(hex[..6].to_string())
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} else {
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None
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}
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}
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fn is_gradient(value: &str) -> bool {
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value.split_whitespace().count() > 1
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}
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/// Flatten to dotted keys, keeping variables separate — HyDE carries
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/// `$GTK_THEME` / `$ICON_THEME` as variables rather than config keys.
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fn walk(items: &[Item], prefix: &str, out: &mut Vec<(String, String, Span)>, vars: &mut Vec<(String, String, Span)>) {
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for item in items {
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match item {
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Item::Section { name, items } => {
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let next = if prefix.is_empty() {
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name.value.clone()
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} else {
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format!("{prefix}.{}", name.value)
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};
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walk(items, &next, out, vars);
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}
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Item::Assign { key, value } => {
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let dotted = if prefix.is_empty() {
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key.value.clone()
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} else {
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format!("{prefix}.{}", key.value)
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};
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out.push((dotted, value.value.clone(), key.span));
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}
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Item::VarDef { name, value } => {
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vars.push((name.value.clone(), value.value.clone(), name.span));
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}
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Item::Source { .. } => {}
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}
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}
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}
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/// Translate a HyDE `hypr.theme` into a `cosmic.conf`.
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pub fn import_hypr_theme(src: &str, theme_name: &str) -> Result<Import, ParseError> {
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let body = strip_hyde_header(src);
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let ast = parse(body)?;
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let mut keys = Vec::new();
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let mut vars = Vec::new();
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walk(&ast.items, "", &mut keys, &mut vars);
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let mut general: Vec<(String, String)> = Vec::new();
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let mut decoration: Vec<(String, String)> = Vec::new();
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let mut theme: Vec<(String, String)> = Vec::new();
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let mut notes = Vec::new();
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for (name, value, span) in &vars {
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match name.as_str() {
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"ICON_THEME" => theme.push(("icon_theme".into(), value.clone())),
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"COLOR_SCHEME" => {
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let mode = if value.contains("light") { "light" } else { "dark" };
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theme.push(("mode".into(), mode.into()));
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}
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"GTK_THEME" => notes.push(Note {
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key: format!("${name}"),
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value: value.clone(),
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reason: Reason::DifferentProgram(
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"GTK theme applies to GTK apps directly; COSMIC apps use cosmic-theme",
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),
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span: *span,
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}),
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_ => {}
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}
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}
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for (key, value, span) in &keys {
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let note = |reason| Note {
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key: key.clone(),
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value: value.clone(),
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reason,
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span: *span,
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};
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match key.as_str() {
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"general.gaps_in" => general.push(("gaps_in".into(), value.clone())),
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"general.gaps_out" => general.push(("gaps_out".into(), value.clone())),
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"decoration.rounding" => decoration.push(("rounding".into(), value.clone())),
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// Border colour is the closest thing a HyDE theme has to an accent.
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"general.col.active_border" => match first_color_rgb(value) {
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Some(hex) => {
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theme.push(("accent".into(), format!("rgb({hex})")));
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if is_gradient(value) {
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notes.push(note(Reason::Lossy(format!(
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"used first stop rgb({hex}) as the accent; COSMIC's active_hint \
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is a solid colour with no gradient or angle"
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))));
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}
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}
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None => notes.push(note(Reason::NoEquivalent("unrecognised colour syntax"))),
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},
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"general.col.inactive_border"
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| "group.col.border_active"
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| "group.col.border_inactive"
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| "group.col.border_locked_active"
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| "group.col.border_locked_inactive" => {
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notes.push(note(Reason::NoEquivalent(
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"COSMIC draws a single active hint; per-state border colours do not exist",
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)));
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}
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"general.border_size" => notes.push(note(Reason::NoEquivalent(
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"COSMIC's active_hint is a boolean, not a width",
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))),
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"general.layout" => notes.push(note(Reason::NoEquivalent(
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"cosmic-comp uses a BSP tiler; dwindle/master are not available",
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))),
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"general.resize_on_border" => notes.push(note(Reason::NoEquivalent(
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"no equivalent setting",
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))),
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k if k.starts_with("decoration.blur") => notes.push(note(
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Reason::NeedsCompositorPatch("COSMIC blur is client-requested via \
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ext-background-effect; rule-driven blur is spec Phase 2"),
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)),
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k if k.starts_with("decoration.shadow") => notes.push(note(
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Reason::NeedsCompositorPatch("shadow.frag exists but is not configurable yet"),
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)),
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"decoration.active_opacity" | "decoration.inactive_opacity" => notes.push(note(
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Reason::NeedsCompositorPatch("window opacity is not configurable yet"),
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)),
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"layerrule" => notes.push(note(Reason::DifferentProgram(
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"layer rules target the bar; waybar is configured directly",
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))),
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"exec" => notes.push(note(Reason::DifferentProgram(
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"HyDE runs gsettings here; icon and GTK themes are handled above",
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))),
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_ => notes.push(note(Reason::NoEquivalent("unrecognised key"))),
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}
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}
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Ok(Import {
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conf: render_conf(theme_name, &general, &decoration, &theme, ¬es),
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notes,
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})
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}
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fn render_conf(
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theme_name: &str,
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general: &[(String, String)],
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decoration: &[(String, String)],
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theme: &[(String, String)],
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notes: &[Note],
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) -> String {
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let mut out = format!(
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"# Generated by `cosmic-conf import-theme` from the HyDE theme {theme_name:?}.\n\
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# Edit freely — this file is the source of truth; cosmic-settings changes\n\
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# are overwritten on the next `cosmic-conf apply`.\n"
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);
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let dropped: Vec<&Note> = notes
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.iter()
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.filter(|n| !matches!(n.reason, Reason::Lossy(_)))
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.collect();
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if !dropped.is_empty() {
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out.push_str(&format!(
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"#\n# {} setting(s) from the source theme were not translated.\n\
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# Run with --report to see them.\n",
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dropped.len()
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));
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}
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let section = |name: &str, rows: &[(String, String)], out: &mut String| {
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if rows.is_empty() {
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return;
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}
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out.push_str(&format!("\n{name} {{\n"));
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let width = rows.iter().map(|(k, _)| k.len()).max().unwrap_or(0);
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for (k, v) in rows {
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out.push_str(&format!(" {k:<width$} = {v}\n"));
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}
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out.push_str("}\n");
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};
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section("general", general, &mut out);
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section("decoration", decoration, &mut out);
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section("theme", theme, &mut out);
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out
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}
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/// Human-readable report of everything that did not translate cleanly.
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pub fn render_report(import: &Import) -> String {
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if import.notes.is_empty() {
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return "Everything in the source theme translated cleanly.\n".into();
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}
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let mut out = String::new();
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let lossy: Vec<&Note> = import
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.notes
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.iter()
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.filter(|n| matches!(n.reason, Reason::Lossy(_)))
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.collect();
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let dropped: Vec<&Note> = import.dropped().collect();
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if !lossy.is_empty() {
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out.push_str("Translated with loss:\n");
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for n in &lossy {
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out.push_str(&format!(" {} = {}\n {}\n", n.key, n.value, n.reason.describe()));
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}
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}
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if !dropped.is_empty() {
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if !lossy.is_empty() {
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out.push('\n');
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}
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out.push_str("Not translated:\n");
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for n in &dropped {
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out.push_str(&format!(" {} = {}\n {}\n", n.key, n.value, n.reason.describe()));
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}
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}
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out
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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/// The genuine Catppuccin-Mocha `hypr.theme` from HyDE-Project/hyde-themes,
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/// verbatim including its destination header. Synthetic fixtures would miss
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/// the header, the colon-keys and the gradient syntax.
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const HYDE_CATPPUCCIN: &str = r#"$HOME/.config/hypr/themes/theme.conf|> $HOME/.config/hypr/themes/colors.conf
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# // P̳r̳a̳s̳a̳n̳t̳h̳ R̳a̳n̳g̳a̳n̳
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$GTK_THEME=Catppuccin-Mocha
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$ICON_THEME = Tela-circle-dracula
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$COLOR_SCHEME = prefer-dark
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exec = gsettings set org.gnome.desktop.interface icon-theme $ICON_THEME
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general {
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gaps_in = 3
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gaps_out = 8
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border_size = 2
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col.active_border = rgba(ca9ee6ff) rgba(f2d5cfff) 45deg
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col.inactive_border = rgba(b4befecc) rgba(6c7086cc) 45deg
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layout = dwindle
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resize_on_border = true
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}
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group {
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col.border_active = rgba(ca9ee6ff) rgba(f2d5cfff) 45deg
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col.border_inactive = rgba(b4befecc) rgba(6c7086cc) 45deg
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}
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decoration {
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rounding = 10
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shadow:enabled = false
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blur {
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enabled = yes
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size = 6
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passes = 3
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}
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}
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layerrule = blur,waybar
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"#;
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fn import() -> Import {
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import_hypr_theme(HYDE_CATPPUCCIN, "Catppuccin Mocha").expect("real HyDE theme must parse")
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}
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#[test]
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fn real_hyde_theme_parses_despite_its_destination_header() {
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// The header has no `=` and would otherwise be a parse error.
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let _ = import();
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}
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#[test]
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fn geometry_is_translated() {
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let c = import().conf;
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assert!(c.contains("gaps_in = 3"), "{c}");
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assert!(c.contains("gaps_out = 8"), "{c}");
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assert!(c.contains("rounding = 10"), "{c}");
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}
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#[test]
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fn accent_comes_from_the_first_gradient_stop() {
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let c = import().conf;
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assert!(c.contains("accent"), "{c}");
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assert!(c.contains("rgb(ca9ee6)"), "{c}");
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}
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#[test]
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fn gradient_loss_is_reported_not_silent() {
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let i = import();
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let lossy: Vec<_> = i
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.notes
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.iter()
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.filter(|n| matches!(n.reason, Reason::Lossy(_)))
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.collect();
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assert_eq!(lossy.len(), 1, "{:?}", i.notes);
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assert_eq!(lossy[0].key, "general.col.active_border");
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assert!(lossy[0].reason.describe().contains("gradient"));
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}
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#[test]
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fn icon_theme_and_color_scheme_come_from_variables() {
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let c = import().conf;
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assert!(c.contains("icon_theme = Tela-circle-dracula"), "{c}");
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assert!(c.contains("mode"), "{c}");
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assert!(c.contains("dark"), "{c}");
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}
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#[test]
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fn blur_is_flagged_as_needing_a_compositor_patch() {
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let i = import();
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let blur: Vec<_> = i
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.notes
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.iter()
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.filter(|n| n.key.starts_with("decoration.blur"))
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.collect();
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assert!(!blur.is_empty(), "blur settings must be reported");
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assert!(blur
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.iter()
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.all(|n| matches!(n.reason, Reason::NeedsCompositorPatch(_))));
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}
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#[test]
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fn unsupported_concepts_are_each_reported() {
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let i = import();
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let keys: Vec<&str> = i.dropped().map(|n| n.key.as_str()).collect();
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for expected in [
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"general.border_size",
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"general.layout",
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"general.col.inactive_border",
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"group.col.border_active",
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"layerrule",
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] {
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assert!(keys.contains(&expected), "`{expected}` missing from {keys:?}");
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}
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}
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#[test]
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fn nothing_is_dropped_without_a_note() {
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// Every source key must either appear in the output or carry a note.
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let i = import();
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let translated = ["general.gaps_in", "general.gaps_out", "decoration.rounding"];
|
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let noted: Vec<&str> = i.notes.iter().map(|n| n.key.as_str()).collect();
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let body = strip_hyde_header(HYDE_CATPPUCCIN);
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let ast = parse(body).unwrap();
|
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let (mut keys, mut vars) = (Vec::new(), Vec::new());
|
||||
walk(&ast.items, "", &mut keys, &mut vars);
|
||||
|
||||
for (k, _, _) in &keys {
|
||||
assert!(
|
||||
translated.contains(&k.as_str()) || noted.contains(&k.as_str()),
|
||||
"`{k}` was neither translated nor reported"
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn generated_conf_is_valid_input_to_our_own_parser() {
|
||||
// The importer must not emit something `apply` cannot read.
|
||||
let c = import().conf;
|
||||
parse(&c).expect("generated cosmic.conf must parse");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn generated_conf_resolves_against_the_registry() {
|
||||
// Stronger: every key it emits must actually exist in the schema.
|
||||
let c = import().conf;
|
||||
let ast = parse(&c).unwrap();
|
||||
crate::resolve(&ast).expect("generated conf must resolve cleanly");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn report_separates_lossy_from_dropped() {
|
||||
let r = render_report(&import());
|
||||
assert!(r.contains("Translated with loss:"), "{r}");
|
||||
assert!(r.contains("Not translated:"), "{r}");
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn header_without_pipe_is_not_stripped() {
|
||||
let src = "general {\n gaps_in = 4\n}\n";
|
||||
let i = import_hypr_theme(src, "t").unwrap();
|
||||
// Single key, so no alignment padding.
|
||||
assert!(i.conf.contains("gaps_in = 4"), "{}", i.conf);
|
||||
}
|
||||
}
|
||||
@@ -9,11 +9,13 @@
|
||||
//! running. Only `emit` binds to cosmic-config, behind the `emit` feature.
|
||||
|
||||
pub mod emit;
|
||||
pub mod import;
|
||||
pub mod parser;
|
||||
pub mod resolve;
|
||||
pub mod schema;
|
||||
|
||||
pub use emit::{EmitError, Emitter, Planned};
|
||||
pub use import::{import_hypr_theme, render_report, Import};
|
||||
pub use parser::{parse, Ast, ParseError, Span};
|
||||
pub use resolve::{resolve, Diagnostic, Resolved, Value, Write, WriteKind};
|
||||
|
||||
|
||||
+66
-1
@@ -5,17 +5,20 @@
|
||||
use std::path::PathBuf;
|
||||
use std::process::ExitCode;
|
||||
|
||||
use cosmic_conf::{emit::Emitter, parse, render_diagnostic, resolve};
|
||||
use cosmic_conf::{emit::Emitter, import, parse, render_diagnostic, resolve};
|
||||
|
||||
const USAGE: &str = "\
|
||||
cosmic-conf — compile cosmic.conf into the cosmic-config tree
|
||||
|
||||
USAGE:
|
||||
cosmic-conf apply [--diff] [--config <path>]
|
||||
cosmic-conf import-theme <hypr.theme> [--out <path>] [--report]
|
||||
|
||||
OPTIONS:
|
||||
--diff Show what would change without writing anything
|
||||
--config <path> Config file (default: $XDG_CONFIG_HOME/hyprcosmic/cosmic.conf)
|
||||
--out <path> Write the generated cosmic.conf here (default: stdout)
|
||||
--report Print everything that did not translate cleanly
|
||||
-h, --help Show this help
|
||||
";
|
||||
|
||||
@@ -34,6 +37,18 @@ fn main() -> ExitCode {
|
||||
print!("{USAGE}");
|
||||
return ExitCode::SUCCESS;
|
||||
}
|
||||
if args[0] == "import-theme" {
|
||||
return match run_import(&args[1..]) {
|
||||
Ok(msg) => {
|
||||
print!("{msg}");
|
||||
ExitCode::SUCCESS
|
||||
}
|
||||
Err(msg) => {
|
||||
eprint!("{msg}");
|
||||
ExitCode::from(1)
|
||||
}
|
||||
};
|
||||
}
|
||||
if args[0] != "apply" {
|
||||
eprintln!("error: unknown command `{}`\n\n{USAGE}", args[0]);
|
||||
return ExitCode::from(2);
|
||||
@@ -130,3 +145,53 @@ fn run(config_path: &PathBuf, diff_only: bool) -> Result<String, String> {
|
||||
emitter.root().display()
|
||||
))
|
||||
}
|
||||
|
||||
fn run_import(args: &[String]) -> Result<String, String> {
|
||||
let Some(src_path) = args.first().filter(|a| !a.starts_with("--")) else {
|
||||
return Err(format!("error: import-theme needs a path\n\n{USAGE}"));
|
||||
};
|
||||
let out_path = args
|
||||
.iter()
|
||||
.position(|a| a == "--out")
|
||||
.and_then(|i| args.get(i + 1))
|
||||
.map(PathBuf::from);
|
||||
let want_report = args.iter().any(|a| a == "--report");
|
||||
|
||||
let source = std::fs::read_to_string(src_path)
|
||||
.map_err(|e| format!("error: cannot read {src_path}: {e}\n"))?;
|
||||
|
||||
// HyDE names a theme by its containing directory.
|
||||
let name = PathBuf::from(src_path)
|
||||
.parent()
|
||||
.and_then(|p| p.file_name())
|
||||
.map(|n| n.to_string_lossy().to_string())
|
||||
.unwrap_or_else(|| "imported".into());
|
||||
|
||||
let imported = import::import_hypr_theme(&source, &name)
|
||||
.map_err(|e| render_diagnostic(&source, e.span, &e.message, None))?;
|
||||
|
||||
let mut out = String::new();
|
||||
match out_path {
|
||||
Some(p) => {
|
||||
if let Some(dir) = p.parent() {
|
||||
std::fs::create_dir_all(dir)
|
||||
.map_err(|e| format!("error: cannot create {}: {e}\n", dir.display()))?;
|
||||
}
|
||||
std::fs::write(&p, &imported.conf)
|
||||
.map_err(|e| format!("error: cannot write {}: {e}\n", p.display()))?;
|
||||
out.push_str(&format!("Wrote {}\n", p.display()));
|
||||
}
|
||||
None => out.push_str(&imported.conf),
|
||||
}
|
||||
|
||||
let dropped = imported.dropped().count();
|
||||
if want_report {
|
||||
out.push('\n');
|
||||
out.push_str(&import::render_report(&imported));
|
||||
} else if dropped > 0 {
|
||||
out.push_str(&format!(
|
||||
"\n{dropped} setting(s) did not translate. Re-run with --report for details.\n"
|
||||
));
|
||||
}
|
||||
Ok(out)
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user