Fallback to broader scope if theme scope not found (#1714)
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c484b08923
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2 changed files with 17 additions and 20 deletions
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@ -27,16 +27,15 @@ pub struct Markdown {
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// better yet, just use Tendril + subtendril for references
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impl Markdown {
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// theme keys, including fallbacks
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const TEXT_STYLE: [&'static str; 2] = ["ui.text", "ui"];
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const BLOCK_STYLE: [&'static str; 3] = ["markup.raw.inline", "markup.raw", "markup"];
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const HEADING_STYLES: [[&'static str; 3]; 6] = [
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["markup.heading.1", "markup.heading", "markup"],
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["markup.heading.2", "markup.heading", "markup"],
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["markup.heading.3", "markup.heading", "markup"],
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["markup.heading.4", "markup.heading", "markup"],
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["markup.heading.5", "markup.heading", "markup"],
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["markup.heading.6", "markup.heading", "markup"],
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const TEXT_STYLE: &'static str = "ui.text";
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const BLOCK_STYLE: &'static str = "markup.raw.inline";
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const HEADING_STYLES: [&'static str; 6] = [
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"markup.heading.1",
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"markup.heading.2",
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"markup.heading.3",
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"markup.heading.4",
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"markup.heading.5",
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"markup.heading.6",
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];
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pub fn new(contents: String, config_loader: Arc<syntax::Loader>) -> Self {
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@ -59,15 +58,9 @@ impl Markdown {
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let mut spans = Vec::new();
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let mut lines = Vec::new();
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let get_theme = |keys: &[&str]| match theme {
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Some(theme) => keys
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.iter()
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.find_map(|key| theme.try_get(key))
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.unwrap_or_default(),
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None => Default::default(),
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};
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let text_style = get_theme(&Self::TEXT_STYLE);
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let code_style = get_theme(&Self::BLOCK_STYLE);
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let get_theme = |key: &str| -> Style { theme.map(|t| t.get(key)).unwrap_or_default() };
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let text_style = get_theme(Self::TEXT_STYLE);
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let code_style = get_theme(Self::BLOCK_STYLE);
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let heading_styles: Vec<Style> = Self::HEADING_STYLES
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.iter()
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.map(|key| get_theme(key))
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@ -153,8 +153,12 @@ impl Theme {
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self.try_get(scope).unwrap_or_default()
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}
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/// Get the style of a scope, falling back to dot separated broader
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/// scopes. For example if `ui.text.focus` is not defined in the theme,
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/// `ui.text` is tried and then `ui` is tried.
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pub fn try_get(&self, scope: &str) -> Option<Style> {
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self.styles.get(scope).copied()
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std::iter::successors(Some(scope), |s| Some(s.rsplit_once('.')?.0))
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.find_map(|s| self.styles.get(s).copied())
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}
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#[inline]
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