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Somewhat doing some progress

master
Julio Biason 4 years ago
parent
f6bb83026f
commit
ea6874c702
3 changed files with 140 additions and 92 deletions
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  1. 1
      html5test/Cargo.lock
  2. 1
      html5test/Cargo.toml
  3. 230
      html5test/src/main.rs

1
html5test/Cargo.lock generated
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@ -46,6 +46,7 @@ name = "html5test"
version = "0.1.0"
dependencies = [
"html5ever",
"markup5ever",
"markup5ever_rcdom",
"textwrap",
]

1
html5test/Cargo.toml
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@ -9,4 +9,5 @@ edition = "2018"
[dependencies]
html5ever = "0.25"
markup5ever_rcdom = "0.1"
markup5ever = "0.10"
textwrap = "0.13"

230
html5test/src/main.rs
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@ -8,9 +8,6 @@ use markup5ever_rcdom::RcDom;
use std::borrow::Borrow;
use std::cell::RefCell;
use std::default::Default;
use textwrap::fill;
use textwrap::NoHyphenation;
use textwrap::Options;
// This go_children/walk is stupid, but I shot myself in the foot by adding
// things after the children, link on links.
@ -42,21 +39,25 @@ use textwrap::Options;
// wrapped (for example, Links)
/// Nodes in the text tree
#[derive(Debug)]
enum NodeType {
/// The root element; produces nothing, but has the base content.
Root,
/// A text block. Contains the text itself.
Text(String),
/// A link to somewhere. Contains the link.
Link(String),
/// Italics
Italic,
/// Code block
Code,
/// A line break
LineBreak,
// /// A link to somewhere. Contains the link.
// Link(String),
// /// Italics
// Italic,
// /// Code block
// Code,
// /// A block with an ellipsis at the end
// Ellipsis,
}
#[derive(Debug)]
struct Node {
r#type: NodeType,
children: Vec<Node>,
@ -75,14 +76,6 @@ impl Node {
fn text(text: &str) -> Self {
Self {
r#type: NodeType::Text(text.into()),
children: Vec::new(), // XXX text nodes will never have children
}
}
/// Build a link node
fn link(href: &str) -> Self {
Self {
r#type: NodeType::Link(href.into()),
children: Vec::new(),
}
}
@ -91,53 +84,105 @@ impl Node {
fn line_break() -> Self {
Self {
r#type: NodeType::LineBreak,
children: Vec::new(), // XXX linebreaks will never have children
children: Vec::new(),
}
}
// /// Build a link node
// fn link(href: &str) -> Self {
// Self {
// r#type: NodeType::Link(href.into()),
// children: Vec::new(),
// }
// }
// /// Build a ellipsis node
// fn ellipsis() -> Self {
// Self {
// r#type: NodeType::Ellipsis,
// children: Vec::new(),
// }
// }
/// Add a child node to this node
fn add_child(&mut self, node: Node) {
self.children.push(node);
}
}
fn handle_text(node: &mut Node, contents: &RefCell<StrTendril>) -> bool {
// Handle functions can return a three state result:
// 1. Do not process the children of the current Handle
// 2. Process the children and add to the same parent
// 3. Use the new Node as parent for future children.
/// Result of the handling functions
enum HandleResult {
/// Stop processing, don't continue generating nodes
Stop,
/// Follow the children, but don't add any nodes in the current level
Follow,
// /// Produce a new node, but don't attach any children to it
// AddAndStay(Node),
/// Assume a new parent node
AddAndAdopt(Node),
}
/// Handle a simple block of text
fn handle_text(node: &mut Node, contents: &RefCell<StrTendril>) -> HandleResult {
let text = contents.borrow().to_string();
node.add_child(Node::text(&text));
true
HandleResult::Stop
}
fn handle_line_break(node: &mut Node) -> bool {
node.add_child(Node::line_break());
true
/// Handle an incoming line break
fn handle_line_break() -> HandleResult {
let line_break = Node::line_break();
HandleResult::AddAndAdopt(line_break)
}
fn handle_span(node: &mut Node, attrs: &RefCell<Vec<Attribute>>) -> bool {
/// Process the span content
fn handle_span(attrs: &RefCell<Vec<Attribute>>) -> HandleResult {
let attrs = attrs.borrow();
let classes = attrs
let classes_attr = attrs
.iter()
.find(|attr| attr.name.local.to_string() == "class");
if let Some(class) = classes {
let classes = class.value.to_string();
// just keep going if not invisible
!classes.contains("invisible")
// if !classes.contains("invisible") {
// true
// if classes.contains("ellipsis") {
// result.push_str("...");
// }
// }
} else {
// with no classes, we consider the element visible and just keep
// processing the list.
true
match classes_attr {
Some(classes) => {
if classes.value.contains("invisible") {
HandleResult::Stop
} else {
HandleResult::Follow
}
}
None => HandleResult::Follow,
}
}
// fn handle_anchor(node: &mut Node, attrs: &RefCell<Vec<Attribute>>) -> HandleResult {
// let attrs = attrs.borrow();
// let rels = attrs
// .iter()
// .find(|attr| attr.name.local.to_string() == "rel");
// let hrefs = attrs
// .iter()
// .find(|attr| attr.name.local.to_string() == "href");
// match (rels, hrefs) {
// (Some(rel), Some(href)) => {
// if !rel.value.to_string().contains("tag") {
// let new_node = Node::link(&href.value);
// node.add_child(new_node);
// HandleResult::NewNode(new_node)
// } else {
// HandleResult::Keep
// }
// }
// _ => HandleResult::Stop,
// }
// }
fn walk(input: &Handle, parent: &mut Node) {
println!(">>> {:?}", input.data);
let process_children = match input.data {
// println!(">>> {:?}", input.data);
let element = match input.data {
NodeData::Text { ref contents } => handle_text(parent, contents),
NodeData::Element {
ref name,
@ -145,67 +190,68 @@ fn walk(input: &Handle, parent: &mut Node) {
..
} => {
let tag = name.local.to_string();
println!("Tag: {:?}", tag);
match tag.as_ref() {
"html" | "head" | "body" => true, // just keep going
"p" => handle_line_break(parent),
"span" => handle_span(parent, attrs),
"a" => {
println!("\tAnchor");
if let NodeData::Element { ref attrs, .. } = input.data {
let attrs = attrs.borrow();
let rels = attrs
.iter()
.find(|attr| attr.name.local.to_string() == "rel");
let hrefs = attrs
.iter()
.find(|attr| attr.name.local.to_string() == "href");
match (rels, hrefs) {
(Some(rel), Some(href)) => {
if !rel.value.to_string().contains("tag") {
result.push_str("[[");
result.push_str(&href.value.to_string());
result.push_str("][");
go_children(input, result);
result.push_str("]]");
} else {
go_children(input, result);
}
}
_ => {}
}
}
}
_ => false,
"html" | "head" | "body" => HandleResult::Follow,
"p" => handle_line_break(),
"span" => handle_span(attrs),
// "a" => handle_anchor(parent, attrs),
_ => HandleResult::Stop,
}
}
_ => true, // if we can't deal with it, just keep going
_ => HandleResult::Follow, // if we can't deal with it, just keep going
};
if process_children {
for child in input.children.borrow().iter() {
walk(child.borrow(), parent);
match element {
HandleResult::Stop => {}
HandleResult::Follow => {
for child in input.children.borrow().iter() {
walk(child.borrow(), parent);
}
}
// HandleResult::AddAndStay(new_node) => {
// parent.add_child(new_node);
// for child in input.children.borrow().iter() {
// walk(child.borrow(), parent);
// }
// }
HandleResult::AddAndAdopt(mut new_node) => {
for child in input.children.borrow().iter() {
walk(child.borrow(), &mut new_node);
}
parent.add_child(new_node);
}
}
}
fn main() {
let source = String::from(
r#"<p>Today I finally moved with my contact and calendar management into the terminal with <a href="https://fosstodon.org/tags/vdirsyncer" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>vdirsyncer</span></a> <a href="https://fosstodon.org/tags/khal" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>khal</span></a> and <a href="https://fosstodon.org/tags/khard" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>khard</span></a>.</p><p>Thank you <span class="h-card"><a href="https://fosstodon.org/@hund" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>hund</span></a></span> for your great post: <a href="https://hund.tty1.se/2020/08/12/how-to-sync-and-manage-your-caldav-and-carddav-via-the-terminal.html" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hund.tty1.se/2020/08/12/how-to</span><span class="invisible">-sync-and-manage-your-caldav-and-carddav-via-the-terminal.html</span></a></p><p><a href="https://fosstodon.org/tags/carddav" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>carddav</span></a> <a href="https://fosstodon.org/tags/caldav" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>caldav</span></a> <a href="https://fosstodon.org/tags/terminal" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>terminal</span></a></p>"#,
);
println!("Source: {}", &source);
println!("---------------------------------");
fn build_nodes(text: &str) {
let dom = parse_document(RcDom::default(), Default::default())
.from_utf8()
.read_from(&mut source.as_bytes())
.read_from(&mut text.as_bytes())
.unwrap();
let mut tree = Node::root();
walk(&dom.document, &mut result);
println!("---------------------------------");
let options = Options::new(70)
.initial_indent(" ")
.subsequent_indent(" ")
.splitter(NoHyphenation);
println!("{}", fill(&result.trim(), &options));
walk(&dom.document, &mut tree);
println!("Tree: {:?}", tree);
}
fn main() {
let example_1 = String::from(r#"<p>A simple text component</p>"#);
build_nodes(&example_1);
let example_2 = String::from(
r#"<p><span class="invisible">THis is not visible</span><span class="ellipsis">but this is</span></p>"#,
);
build_nodes(&example_2);
// let example_1 = String::from(
// r#"<p>Today I finally moved with my contact and calendar management into the terminal with <a href="https://fosstodon.org/tags/vdirsyncer" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>vdirsyncer</span></a> <a href="https://fosstodon.org/tags/khal" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>khal</span></a> and <a href="https://fosstodon.org/tags/khard" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>khard</span></a>.</p><p>Thank you <span class="h-card"><a href="https://fosstodon.org/@hund" class="u-url mention" rel="nofollow noopener noreferrer" target="_blank">@<span>hund</span></a></span> for your great post: <a href="https://hund.tty1.se/2020/08/12/how-to-sync-and-manage-your-caldav-and-carddav-via-the-terminal.html" rel="nofollow noopener noreferrer" target="_blank"><span class="invisible">https://</span><span class="ellipsis">hund.tty1.se/2020/08/12/how-to</span><span class="invisible">-sync-and-manage-your-caldav-and-carddav-via-the-terminal.html</span></a></p><p><a href="https://fosstodon.org/tags/carddav" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>carddav</span></a> <a href="https://fosstodon.org/tags/caldav" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>caldav</span></a> <a href="https://fosstodon.org/tags/terminal" class="mention hashtag" rel="tag nofollow noopener noreferrer" target="_blank">#<span>terminal</span></a></p>"#,
// );
// println!("Source: {}", &example_1);
// println!("---------------------------------");
// let dom = parse_document(RcDom::default(), Default::default())
// .from_utf8()
// .read_from(&mut example_1.as_bytes())
// .unwrap();
// let mut tree = Node::root();
// walk(&dom.document, &mut tree);
}

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