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authorJames Campos <james.r.campos@gmail.com>2020-04-30 05:59:05 -0700
committerJames Campos <james.r.campos@gmail.com>2020-04-30 05:59:05 -0700
commit77ae1bde466e20775352fe3c792750cc3b2ccee3 (patch)
tree79342b41543a81bef4adae7434a5fea2d312cdf6 /src
parent6fef7d9cdbd7030f58d49e9ac18ab101fd186b56 (diff)
downloadbk-77ae1bde466e20775352fe3c792750cc3b2ccee3.tar.gz
recursive descent
Diffstat (limited to 'src')
-rw-r--r--src/main.rs139
1 files changed, 73 insertions, 66 deletions
diff --git a/src/main.rs b/src/main.rs
index e059407..fc8d305 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -31,6 +31,46 @@ impl Epub {
container: zip::ZipArchive::new(file)?,
})
}
+ fn render<'a>(acc: &mut Vec<Vec<&'a str>>, n: roxmltree::Node<'a, '_>) {
+ if n.is_text() {
+ let text = n.text().unwrap();
+ if !text.trim().is_empty() {
+ let last = acc.last_mut().unwrap();
+ last.push(text);
+ }
+ return
+ }
+
+ match n.tag_name().name() {
+ "h1" | "h2" | "h3" | "h4" | "h5" | "h6" => {
+ acc.push(vec!["\x1b\x5b1m"]);
+ for c in n.children() {
+ Self::render(acc, c);
+ }
+ acc.push(vec!["\x1b\x5b0m"]);
+ }
+ "blockquote" | "p" => {
+ acc.push(Vec::new());
+ for c in n.children() {
+ Self::render(acc, c);
+ }
+ acc.push(Vec::new());
+ }
+ "li" => {
+ acc.push(vec!["- "]);
+ for c in n.children() {
+ Self::render(acc, c);
+ }
+ acc.push(Vec::new());
+ }
+ "br" => acc.push(Vec::new()),
+ _ => {
+ for c in n.children() {
+ Self::render(acc, c);
+ }
+ }
+ }
+ }
fn get_text(&mut self, name: &str) -> String {
let mut text = String::new();
self.container
@@ -50,9 +90,9 @@ impl Epub {
.attribute("full-path")
.unwrap();
- // manifest - paths
- // spine - order
- // toc - names
+ // manifest - resource paths
+ // spine - chapter list
+ // toc - chapter names, may have fewer items than spine
let mut manifest = HashMap::new();
let xml = self.get_text(path);
let doc = Document::parse(&xml).unwrap();
@@ -149,34 +189,32 @@ impl Epub {
}
}
-fn wrap(text: Vec<String>, width: u16) -> Vec<String> {
+fn wrap(text: String, width: u16) -> Vec<String> {
// XXX assumes a char is 1 unit wide
// TODO break at dash/hyphen
- let mut wrapped = Vec::with_capacity(text.len() * 2);
-
- for chunk in text {
- let mut start = 0;
- let mut space = 0;
- let mut line = 0;
- let mut word = 0;
-
- for (i, c) in chunk.char_indices() {
- if c == ' ' {
- space = i;
- word = 0;
- } else {
- word += 1;
- }
- if line == width {
- wrapped.push(String::from(&chunk[start..space]));
- start = space + 1;
- line = word;
- } else {
- line += 1;
- }
+ let mut wrapped = Vec::new();
+
+ let mut start = 0;
+ let mut space = 0;
+ let mut line = 0;
+ let mut word = 0;
+
+ for (i, c) in text.char_indices() {
+ if c == ' ' {
+ space = i;
+ word = 0;
+ } else {
+ word += 1;
+ }
+ if line == width {
+ wrapped.push(String::from(&text[start..space]));
+ start = space + 1;
+ line = word;
+ } else {
+ line += 1;
}
- wrapped.push(String::from(&chunk[start..]));
}
+ wrapped.push(String::from(&text[start..]));
wrapped
}
@@ -268,47 +306,15 @@ impl Bk {
fn get_chapter(&mut self, idx: usize) {
let xml = self.epub.get_text(&self.toc[idx].1);
let doc = Document::parse(&xml).unwrap();
-
+ let body = doc.root_element().last_element_child().unwrap();
let mut chapter = Vec::new();
- for n in doc.descendants() {
- match n.tag_name().name() {
- "h1" | "h2" | "h3" | "h4" | "h5" | "h6" => {
- let text: String = n
- .descendants()
- .filter(|n| n.is_text())
- .map(|n| n.text().unwrap())
- .collect();
- chapter.push(format!(
- "{}{}{}",
- Attribute::Bold,
- text,
- Attribute::Reset
- ));
- chapter.push(String::from(""));
- }
- "p" => {
- chapter.push(
- n.descendants()
- .filter(|n| n.is_text())
- .map(|n| n.text().unwrap())
- .collect(),
- );
- chapter.push(String::from(""));
- }
- "li" => {
- chapter.push(
- n.descendants()
- .filter(|n| n.is_text())
- .map(|n| format!("- {}", n.text().unwrap()))
- .collect(),
- );
- chapter.push(String::from(""));
- }
- _ => (),
- }
+ Epub::render(&mut chapter, body);
+
+ let width = self.cols - (self.pad * 2);
+ self.chapter = Vec::with_capacity(chapter.len() * 2);
+ for line in chapter {
+ self.chapter.append(&mut wrap(line.concat(), width));
}
- chapter.pop(); //padding
- self.chapter = wrap(chapter, self.cols - (self.pad * 2));
self.chapter_idx = idx;
}
fn scroll_down(&mut self, n: usize) {
@@ -494,6 +500,7 @@ impl Bk {
stdout.flush().unwrap();
}
fn render_help(&self) {
+ // TODO const?
let text = r#"
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