2026-05-30 18:35:40 +00:00
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//! HTML export — pure helpers shared by the `nuwiki.export.*`
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2026-05-11 21:37:36 +00:00
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//! command handlers. Side-effecting work (reading the template from
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//! disk, writing the rendered HTML, copying CSS) lives in `commands.rs`
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//! since the dispatcher is the one with a `&Backend` and async context.
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//!
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//! Design split:
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//! - [`output_path_for`] / [`output_url_for`] — name → on-disk path.
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//! - [`template_for`] — locate the right template file on disk.
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//! - [`fallback_template`] — minimal stand-in when nothing is found.
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//! - [`format_date`] — strftime subset (`%Y`/`%m`/`%d`).
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//! - [`build_toc_html`] — TOC rendered into the `{{toc}}` variable.
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//! - [`compute_root_path`] — relative path from a page's output to
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//! `html_path` for stylesheet hrefs in nested pages.
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//! - [`is_excluded`] — glob match against `exclude_files`.
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//! - [`render_page_html`] — drives [`HtmlRenderer`] with all of the
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//! above wired up; returns the final HTML string.
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use std::collections::HashMap;
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use std::path::{Path, PathBuf};
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2026-05-28 21:19:55 -03:00
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use nuwiki_core::ast::{BlockNode, DocumentNode, HeadingNode, InlineNode, LinkKind};
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2026-05-11 21:37:36 +00:00
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use nuwiki_core::date::DiaryDate;
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use nuwiki_core::render::{HtmlRenderer, Renderer};
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use crate::config::{HtmlConfig, WikiConfig};
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/// Map a page name (e.g. `"diary/2026-05-11"`) to its on-disk HTML
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/// output path under `html_path`. Honours
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/// [`HtmlConfig::html_filename_parameterization`] for URL-safe slugs
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/// — when enabled, only the final path segment is slugified (so the
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/// `diary/` subdir survives).
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pub fn output_path_for(cfg: &HtmlConfig, name: &str) -> PathBuf {
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let segments: Vec<String> = name
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.split('/')
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.map(|s| {
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if cfg.html_filename_parameterization {
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slugify(s)
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} else {
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s.to_string()
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}
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})
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.collect();
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let mut p = cfg.html_path.clone();
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for (i, seg) in segments.iter().enumerate() {
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if i + 1 == segments.len() {
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p.push(format!("{seg}.html"));
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} else {
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p.push(seg);
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}
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}
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p
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}
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/// Locate the template body for a document. Resolution order:
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/// 1. `<template_path>/<doc.metadata.template>.<template_ext>` if set.
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/// 2. `<template_path>/<template_default>.<template_ext>`.
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/// 3. [`fallback_template`].
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///
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/// The on-disk read is performed by the caller (`commands.rs`) via the
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/// [`TemplateSource`] returned here. Keeps this fn pure for tests.
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pub fn template_for(cfg: &HtmlConfig, doc: &DocumentNode) -> TemplateSource {
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let primary = doc.metadata.template.as_deref().map(|name| {
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cfg.template_path
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.join(format!("{name}{}", cfg.template_ext))
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});
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let fallback = cfg
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.template_path
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.join(format!("{}{}", cfg.template_default, cfg.template_ext));
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TemplateSource { primary, fallback }
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}
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/// Two-tier lookup result. Caller tries `primary` first, then `fallback`,
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/// then falls back to [`fallback_template`] when neither file exists.
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#[derive(Debug, Clone, PartialEq, Eq)]
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pub struct TemplateSource {
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pub primary: Option<PathBuf>,
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pub fallback: PathBuf,
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}
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/// Minimal valid HTML page used when no template file is found on disk.
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/// Includes the same `{{title}}` / `{{content}}` placeholders as a real
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/// template so the renderer's substitution still works.
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pub fn fallback_template(css_name: &str) -> String {
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format!(
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r#"<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>{{{{title}}}}</title>
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<link rel="stylesheet" href="{{{{root_path}}}}{css_name}">
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</head>
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<body>
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{{{{content}}}}
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</body>
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</html>
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"#
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)
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}
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/// Tiny strftime: supports `%Y` (4-digit year), `%m` (2-digit month),
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/// `%d` (2-digit day), `%%` (literal percent). Anything else passes
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/// through. The diary use case never produces time-of-day output, so
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/// `%H`/`%M`/`%S` are intentionally omitted.
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pub fn format_date(date: &DiaryDate, fmt: &str) -> String {
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let mut out = String::with_capacity(fmt.len() + 4);
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let bytes = fmt.as_bytes();
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let mut i = 0;
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while i < bytes.len() {
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if bytes[i] == b'%' && i + 1 < bytes.len() {
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match bytes[i + 1] {
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b'Y' => out.push_str(&format!("{:04}", date.year)),
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b'm' => out.push_str(&format!("{:02}", date.month)),
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b'd' => out.push_str(&format!("{:02}", date.day)),
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b'%' => out.push('%'),
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other => {
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out.push('%');
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out.push(other as char);
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}
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}
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i += 2;
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} else {
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out.push(bytes[i] as char);
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i += 1;
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}
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}
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out
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}
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/// Render the page's headings as a nested `<ul>` for the `{{toc}}`
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/// template variable. Returns an empty string when the document has
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/// no headings.
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pub fn build_toc_html(doc: &DocumentNode) -> String {
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let headings = collect_headings(doc);
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if headings.is_empty() {
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return String::new();
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}
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let min_level = headings.iter().map(|h| h.level).min().unwrap_or(1);
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let mut out = String::from("<ul class=\"toc\">");
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let mut depth = 0usize;
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for h in &headings {
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let target = h.level.saturating_sub(min_level) as usize;
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while depth < target {
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out.push_str("<ul>");
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depth += 1;
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}
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while depth > target {
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out.push_str("</ul>");
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depth -= 1;
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}
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let anchor = crate::index::slugify(&h.title);
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out.push_str(&format!(
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"<li><a href=\"#{anchor}\">{title}</a></li>",
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title = escape_html(&h.title)
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));
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}
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while depth > 0 {
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out.push_str("</ul>");
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depth -= 1;
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}
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out.push_str("</ul>");
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out
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}
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/// Compute the relative path back to `html_path` from the directory
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/// holding the output file for `name`. Used as the `{{root_path}}`
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/// prefix so a nested page's `<link>`/`<script>` hrefs still find
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/// the shared CSS at the export root.
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pub fn compute_root_path(name: &str) -> String {
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let depth = name.matches('/').count();
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if depth == 0 {
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String::new()
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} else {
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let mut s = String::with_capacity(depth * 3);
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for _ in 0..depth {
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s.push_str("../");
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}
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s
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}
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}
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/// True if `name` matches any of the `exclude_files` glob patterns.
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/// Supported wildcards: `*` (any segment chars except `/`), `**` (any
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/// segments including `/`), `?` (one char). Anything else is literal.
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pub fn is_excluded(patterns: &[String], name: &str) -> bool {
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patterns.iter().any(|p| glob_match(p, name))
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}
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/// Pure HTML render pass. The caller has already loaded the template
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/// (or falls back). Wires up `{{date}}`, `{{root_path}}`, `{{toc}}`
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/// plus arbitrary extras passed via `extra_vars`.
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2026-05-28 21:19:55 -03:00
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///
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/// `wiki_extension` is the wiki's source file extension (e.g. `".wiki"`).
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/// When set, it is stripped from wiki/interwiki link targets so a link
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/// written with the extension (`[[todo.wiki]]`) exports to `todo.html`,
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/// matching how the LSP resolves the same link for in-editor navigation.
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2026-05-31 08:13:30 -03:00
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// Every parameter is a distinct, cohesive render input; bundling them into a
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// struct would add an abstraction without simplifying the single caller.
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#[allow(clippy::too_many_arguments)]
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2026-05-11 21:37:36 +00:00
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pub fn render_page_html(
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doc: &DocumentNode,
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template: Option<String>,
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name: &str,
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today: DiaryDate,
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cfg: &HtmlConfig,
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2026-05-28 21:19:55 -03:00
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wiki_extension: Option<&str>,
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2026-05-30 23:12:08 -03:00
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list_margin: i32,
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2026-05-11 21:37:36 +00:00
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extra_vars: HashMap<String, String>,
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) -> std::io::Result<String> {
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let date_str = match doc.metadata.date.as_deref() {
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Some(s) => match DiaryDate::parse(s) {
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Some(d) => format_date(&d, &cfg.template_date_format),
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None => s.to_string(),
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},
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None => format_date(&today, &cfg.template_date_format),
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};
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let root_path = compute_root_path(name);
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let toc = build_toc_html(doc);
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let mut vars: HashMap<String, String> = HashMap::new();
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vars.insert("date".into(), date_str);
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vars.insert("root_path".into(), root_path);
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vars.insert("toc".into(), toc);
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vars.insert("css".into(), cfg.css_name.clone());
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2026-05-28 21:19:55 -03:00
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// vimwiki names the stylesheet placeholder `%wiki_css%`; alias it so stock
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// templates resolve. nuwiki's own templates use `{{css}}`.
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vars.insert("wiki_css".into(), cfg.css_name.clone());
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2026-05-11 21:37:36 +00:00
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for (k, v) in extra_vars {
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vars.insert(k, v);
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}
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2026-05-30 23:12:08 -03:00
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let mut r = HtmlRenderer::new().with_list_margin(list_margin);
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2026-05-28 21:19:55 -03:00
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if let Some(ext) = wiki_extension.filter(|e| !e.trim_start_matches('.').is_empty()) {
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// Strip the wiki extension from page links before the default resolver
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// turns them into `.html` URLs, so `[[todo.wiki]]` → `todo.html` rather
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// than `todo.wiki.html`. Only wiki/interwiki targets are touched;
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// file:/local: paths keep their literal extension.
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let ext = ext.to_string();
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r = r.with_link_resolver(move |target| {
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let mut t = target.clone();
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if matches!(t.kind, LinkKind::Wiki | LinkKind::Interwiki) {
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if let Some(p) = t.path.take() {
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t.path = Some(crate::index::strip_wiki_extension(&p, Some(&ext)).to_string());
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}
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}
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nuwiki_core::render::html::default_link_resolver(&t)
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});
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}
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2026-05-11 21:37:36 +00:00
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if let Some(t) = template {
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r = r.with_template(t);
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}
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r = r.with_vars(vars);
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2026-05-12 14:45:39 +00:00
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if !cfg.color_dic.is_empty() {
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r = r.with_colors(cfg.color_dic.clone());
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}
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2026-06-02 00:33:01 +00:00
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if cfg.html_header_numbering > 0 {
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r = r.with_header_numbering(
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cfg.html_header_numbering,
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cfg.html_header_numbering_sym.clone(),
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);
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}
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2026-05-11 21:37:36 +00:00
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r.render_to_string(doc)
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}
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// ===== Internals =====
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fn slugify(s: &str) -> String {
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let mut out = String::with_capacity(s.len());
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let mut prev_dash = false;
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for ch in s.chars() {
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if ch.is_alphanumeric() {
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for c in ch.to_lowercase() {
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out.push(c);
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}
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prev_dash = false;
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} else if !prev_dash && !out.is_empty() {
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out.push('-');
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prev_dash = true;
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}
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}
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while out.ends_with('-') {
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out.pop();
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}
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if out.is_empty() {
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"untitled".into()
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} else {
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out
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}
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}
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fn collect_headings(doc: &DocumentNode) -> Vec<HeadingProj> {
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let mut out = Vec::new();
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for b in &doc.children {
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if let BlockNode::Heading(h) = b {
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out.push(HeadingProj {
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level: h.level,
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title: inline_to_text(h),
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});
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}
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}
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|
out
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
struct HeadingProj {
|
|
|
|
|
level: u8,
|
|
|
|
|
title: String,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn inline_to_text(h: &HeadingNode) -> String {
|
|
|
|
|
let mut s = String::new();
|
|
|
|
|
for n in &h.children {
|
|
|
|
|
push_inline(n, &mut s);
|
|
|
|
|
}
|
|
|
|
|
s.trim().to_string()
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn push_inline(n: &InlineNode, out: &mut String) {
|
|
|
|
|
match n {
|
|
|
|
|
InlineNode::Text(t) => out.push_str(&t.content),
|
|
|
|
|
InlineNode::Bold(b) => b.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::Italic(i) => i.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::BoldItalic(bi) => bi.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::Strikethrough(s) => s.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::Code(c) => out.push_str(&c.content),
|
|
|
|
|
InlineNode::Superscript(s) => s.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::Subscript(s) => s.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::Color(c) => c.children.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
InlineNode::WikiLink(w) => match &w.description {
|
|
|
|
|
Some(d) => d.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
None => {
|
|
|
|
|
if let Some(p) = &w.target.path {
|
|
|
|
|
out.push_str(p);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
},
|
|
|
|
|
InlineNode::ExternalLink(e) => match &e.description {
|
|
|
|
|
Some(d) => d.iter().for_each(|c| push_inline(c, out)),
|
|
|
|
|
None => out.push_str(&e.url),
|
|
|
|
|
},
|
|
|
|
|
_ => {}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn escape_html(s: &str) -> String {
|
|
|
|
|
let mut out = String::with_capacity(s.len());
|
|
|
|
|
for ch in s.chars() {
|
|
|
|
|
match ch {
|
|
|
|
|
'&' => out.push_str("&"),
|
|
|
|
|
'<' => out.push_str("<"),
|
|
|
|
|
'>' => out.push_str(">"),
|
|
|
|
|
'"' => out.push_str("""),
|
|
|
|
|
_ => out.push(ch),
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
out
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Minimal glob match for `exclude_files`. Handles `*`, `**`, `?` and
|
|
|
|
|
/// literal characters. No character classes — those aren't needed for
|
|
|
|
|
/// "exclude foo/*.tmp" style patterns.
|
|
|
|
|
fn glob_match(pattern: &str, text: &str) -> bool {
|
|
|
|
|
glob_impl(pattern.as_bytes(), text.as_bytes())
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
fn glob_impl(p: &[u8], t: &[u8]) -> bool {
|
|
|
|
|
let mut pi = 0;
|
|
|
|
|
let mut ti = 0;
|
|
|
|
|
let mut star: Option<(usize, usize)> = None;
|
|
|
|
|
let mut globstar = false;
|
|
|
|
|
while ti < t.len() {
|
|
|
|
|
if pi < p.len() && pi + 1 < p.len() && p[pi] == b'*' && p[pi + 1] == b'*' {
|
|
|
|
|
globstar = true;
|
|
|
|
|
star = Some((pi, ti));
|
|
|
|
|
pi += 2;
|
|
|
|
|
// Allow optional `/` after globstar.
|
|
|
|
|
if pi < p.len() && p[pi] == b'/' {
|
|
|
|
|
pi += 1;
|
|
|
|
|
}
|
|
|
|
|
continue;
|
|
|
|
|
} else if pi < p.len() && p[pi] == b'*' {
|
|
|
|
|
star = Some((pi, ti));
|
|
|
|
|
pi += 1;
|
|
|
|
|
globstar = false;
|
|
|
|
|
continue;
|
|
|
|
|
} else if pi < p.len() && (p[pi] == b'?' || p[pi] == t[ti]) {
|
|
|
|
|
pi += 1;
|
|
|
|
|
ti += 1;
|
|
|
|
|
continue;
|
|
|
|
|
} else if let Some((s_pi, s_ti)) = star {
|
|
|
|
|
if !globstar && t[s_ti] == b'/' && t[ti] != b'/' {
|
|
|
|
|
// single-star can't cross a `/`
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
pi = if globstar { s_pi + 2 } else { s_pi + 1 };
|
|
|
|
|
ti = s_ti + 1;
|
|
|
|
|
star = Some((s_pi, ti));
|
|
|
|
|
continue;
|
|
|
|
|
} else {
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
while pi < p.len() && (p[pi] == b'*' || (p[pi] == b'/' && globstar)) {
|
|
|
|
|
pi += 1;
|
|
|
|
|
}
|
|
|
|
|
pi == p.len()
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// `<html_path>/<css_name>` — the absolute path of the CSS file the
|
|
|
|
|
/// renderer references via `{{root_path}}{{css}}`.
|
|
|
|
|
pub fn css_path(cfg: &HtmlConfig) -> PathBuf {
|
|
|
|
|
cfg.html_path.join(&cfg.css_name)
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/// Minimal default CSS. Used by `nuwiki.export.*` commands when no CSS
|
|
|
|
|
/// file exists yet at [`css_path`]. Deliberately tiny — users are
|
|
|
|
|
/// expected to replace it with their own.
|
|
|
|
|
pub const DEFAULT_CSS: &str =
|
|
|
|
|
"body{font-family:sans-serif;max-width:46em;margin:2em auto;padding:0 1em;line-height:1.55}\
|
|
|
|
|
h1,h2,h3,h4,h5,h6{font-family:serif;line-height:1.2}\
|
|
|
|
|
pre{background:#f4f4f4;padding:.5em;overflow:auto}\
|
|
|
|
|
code{background:#f4f4f4;padding:.1em .25em;border-radius:3px}\
|
|
|
|
|
table{border-collapse:collapse}\
|
|
|
|
|
table td,table th{border:1px solid #ccc;padding:.25em .5em}\
|
|
|
|
|
ul.toc{padding-left:1.5em}\n";
|
|
|
|
|
|
|
|
|
|
/// Convenience wrapper exposed for the dispatcher: convert a wiki config
|
|
|
|
|
/// to the absolute output dir.
|
|
|
|
|
pub fn html_output_dir(cfg: &WikiConfig) -> &Path {
|
|
|
|
|
&cfg.html.html_path
|
|
|
|
|
}
|
