1 files changed, 177 insertions, 0 deletions
diff --git a/examples/print-tree-actions.rs b/examples/print-tree-actions.rs
new file mode 100644
index 0000000..dbb6c6e
--- /dev/null
+++ b/examples/print-tree-actions.rs
@@ -0,0 +1,177 @@
+// Copyright 2014-2017 The html5ever Project Developers. See the
+// COPYRIGHT file at the top-level directory of this distribution.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#[macro_use]
+extern crate html5ever;
+
+use std::borrow::Cow;
+use std::collections::HashMap;
+use std::default::Default;
+use std::io;
+
+use html5ever::parse_document;
+use html5ever::tendril::*;
+use html5ever::tree_builder::{
+    AppendNode, AppendText, ElementFlags, NodeOrText, QuirksMode, TreeSink,
+};
+use html5ever::{Attribute, ExpandedName, QualName};
+
+struct Sink {
+    next_id: usize,
+    names: HashMap<usize, QualName>,
+}
+
+impl Sink {
+    fn get_id(&mut self) -> usize {
+        let id = self.next_id;
+        self.next_id += 2;
+        id
+    }
+}
+
+impl TreeSink for Sink {
+    type Handle = usize;
+    type Output = Self;
+    fn finish(self) -> Self {
+        self
+    }
+
+    fn parse_error(&mut self, msg: Cow<'static, str>) {
+        println!("Parse error: {}", msg);
+    }
+
+    fn get_document(&mut self) -> usize {
+        0
+    }
+
+    fn get_template_contents(&mut self, target: &usize) -> usize {
+        if let Some(expanded_name!(html "template")) = self.names.get(target).map(|n| n.expanded())
+        {
+            target + 1
+        } else {
+            panic!("not a template element")
+        }
+    }
+
+    fn set_quirks_mode(&mut self, mode: QuirksMode) {
+        println!("Set quirks mode to {:?}", mode);
+    }
+
+    fn same_node(&self, x: &usize, y: &usize) -> bool {
+        x == y
+    }
+
+    fn elem_name(&self, target: &usize) -> ExpandedName {
+        self.names.get(target).expect("not an element").expanded()
+    }
+
+    fn create_element(&mut self, name: QualName, _: Vec<Attribute>, _: ElementFlags) -> usize {
+        let id = self.get_id();
+        println!("Created {:?} as {}", name, id);
+        self.names.insert(id, name);
+        id
+    }
+
+    fn create_comment(&mut self, text: StrTendril) -> usize {
+        let id = self.get_id();
+        println!("Created comment \"{}\" as {}", escape_default(&text), id);
+        id
+    }
+
+    #[allow(unused_variables)]
+    fn create_pi(&mut self, target: StrTendril, value: StrTendril) -> usize {
+        unimplemented!()
+    }
+
+    fn append(&mut self, parent: &usize, child: NodeOrText<usize>) {
+        match child {
+            AppendNode(n) => println!("Append node {} to {}", n, parent),
+            AppendText(t) => println!("Append text to {}: \"{}\"", parent, escape_default(&t)),
+        }
+    }
+
+    fn append_before_sibling(&mut self, sibling: &usize, new_node: NodeOrText<usize>) {
+        match new_node {
+            AppendNode(n) => println!("Append node {} before {}", n, sibling),
+            AppendText(t) => println!("Append text before {}: \"{}\"", sibling, escape_default(&t)),
+        }
+    }
+
+    fn append_based_on_parent_node(
+        &mut self,
+        element: &Self::Handle,
+        _prev_element: &Self::Handle,
+        child: NodeOrText<Self::Handle>,
+    ) {
+        self.append_before_sibling(element, child);
+    }
+
+    fn append_doctype_to_document(
+        &mut self,
+        name: StrTendril,
+        public_id: StrTendril,
+        system_id: StrTendril,
+    ) {
+        println!("Append doctype: {} {} {}", name, public_id, system_id);
+    }
+
+    fn add_attrs_if_missing(&mut self, target: &usize, attrs: Vec<Attribute>) {
+        assert!(self.names.contains_key(target), "not an element");
+        println!("Add missing attributes to {}:", target);
+        for attr in attrs.into_iter() {
+            println!("    {:?} = {}", attr.name, attr.value);
+        }
+    }
+
+    fn associate_with_form(
+        &mut self,
+        _target: &usize,
+        _form: &usize,
+        _nodes: (&usize, Option<&usize>),
+    ) {
+        // No form owner support.
+    }
+
+    fn remove_from_parent(&mut self, target: &usize) {
+        println!("Remove {} from parent", target);
+    }
+
+    fn reparent_children(&mut self, node: &usize, new_parent: &usize) {
+        println!("Move children from {} to {}", node, new_parent);
+    }
+
+    fn mark_script_already_started(&mut self, node: &usize) {
+        println!("Mark script {} as already started", node);
+    }
+
+    fn set_current_line(&mut self, line_number: u64) {
+        println!("Set current line to {}", line_number);
+    }
+
+    fn pop(&mut self, elem: &usize) {
+        println!("Popped element {}", elem);
+    }
+}
+
+// FIXME: Copy of str::escape_default from std, which is currently unstable
+pub fn escape_default(s: &str) -> String {
+    s.chars().flat_map(|c| c.escape_default()).collect()
+}
+
+fn main() {
+    let sink = Sink {
+        next_id: 1,
+        names: HashMap::new(),
+    };
+    let stdin = io::stdin();
+    parse_document(sink, Default::default())
+        .from_utf8()
+        .read_from(&mut stdin.lock())
+        .unwrap();
+}