Cargo.toml 🔗
@@ -0,0 +1,7 @@
+[package]
+name = "minidom"
+version = "0.1.0"
+authors = ["lumi <lumi@pew.im>"]
+
+[dependencies]
+xml-rs = "*"
initial commit
lumi created
Change summary
Cargo.toml | 7 +
src/error.rs | 32 ++++++
src/lib.rs | 281 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 320 insertions(+)
Detailed changes
src/error.rs 🔗
@@ -0,0 +1,32 @@
+use std::io;
+
+use std::convert::From;
+
+use xml::writer::Error as WriterError;
+use xml::reader::Error as ReaderError;
+
+#[derive(Debug)]
+pub enum Error {
+ IoError(io::Error),
+ XmlWriterError(WriterError),
+ XmlReaderError(ReaderError),
+ EndOfDocument,
+}
+
+impl From<io::Error> for Error {
+ fn from(err: io::Error) -> Error {
+ Error::IoError(err)
+ }
+}
+
+impl From<WriterError> for Error {
+ fn from(err: WriterError) -> Error {
+ Error::XmlWriterError(err)
+ }
+}
+
+impl From<ReaderError> for Error {
+ fn from(err: ReaderError) -> Error {
+ Error::XmlReaderError(err)
+ }
+}
src/lib.rs 🔗
@@ -0,0 +1,281 @@
+extern crate xml;
+
+pub mod error;
+
+use std::io::prelude::*;
+
+use std::convert::From;
+
+use std::fmt;
+
+use xml::name::{OwnedName, Name};
+use xml::reader::{XmlEvent as ReaderEvent, EventReader};
+use xml::writer::{XmlEvent as WriterEvent, EventWriter};
+use xml::attribute::OwnedAttribute;
+
+use error::Error;
+
+#[derive(Clone, PartialEq, Eq)]
+pub struct Element {
+ name: OwnedName,
+ attributes: Vec<OwnedAttribute>,
+ children: Vec<Fork>,
+}
+
+impl fmt::Debug for Element {
+ fn fmt(&self, fmt: &mut fmt::Formatter) -> Result<(), fmt::Error> {
+ write!(fmt, "<{}", self.name)?;
+ for attr in &self.attributes {
+ write!(fmt, " {}", attr)?;
+ }
+ write!(fmt, ">")?;
+ for child in &self.children {
+ match *child {
+ Fork::Element(ref e) => {
+ write!(fmt, "{:?}", e)?;
+ },
+ Fork::Text(ref s) => {
+ write!(fmt, "{}", s)?;
+ },
+ }
+ }
+ write!(fmt, "</{}>", self.name)?;
+ Ok(())
+ }
+}
+
+#[derive(Clone, Debug, PartialEq, Eq)]
+pub enum Fork {
+ Element(Element),
+ Text(String),
+}
+
+impl Element {
+ pub fn new(name: OwnedName, attributes: Vec<OwnedAttribute>) -> Element {
+ Element {
+ name: name,
+ attributes: attributes,
+ children: Vec::new(),
+ }
+ }
+
+ pub fn builder<S: Into<String>>(name: S) -> ElementBuilder {
+ ElementBuilder {
+ name: OwnedName::local(name),
+ attributes: Vec::new(),
+ }
+ }
+
+ pub fn tag(&self) -> &str {
+ &self.name.local_name
+ }
+
+ pub fn ns(&self) -> Option<&str> {
+ self.name.namespace.as_ref()
+ .map(String::as_ref)
+ }
+
+ pub fn attr(&self, key: &str) -> Option<&str> {
+ for attr in &self.attributes {
+ if attr.name.local_name == key {
+ return Some(&attr.value);
+ }
+ }
+ None
+ }
+
+ pub fn from_reader<R: Read>(reader: &mut EventReader<R>) -> Result<Element, Error> {
+ loop {
+ let e = reader.next()?;
+ match e {
+ ReaderEvent::StartElement { name, attributes, .. } => {
+ let mut root = Element::new(name, attributes);
+ root.from_reader_inner(reader);
+ return Ok(root);
+ },
+ ReaderEvent::EndDocument => {
+ return Err(Error::EndOfDocument);
+ },
+ _ => () // TODO: may need more errors
+ }
+ }
+ }
+
+ fn from_reader_inner<R: Read>(&mut self, reader: &mut EventReader<R>) -> Result<(), Error> {
+ loop {
+ let e = reader.next()?;
+ match e {
+ ReaderEvent::StartElement { name, attributes, .. } => {
+ let elem = Element::new(name, attributes);
+ let elem_ref = self.append_child(elem);
+ elem_ref.from_reader_inner(reader);
+ },
+ ReaderEvent::EndElement { .. } => {
+ // TODO: may want to check whether we're closing the correct element
+ return Ok(());
+ },
+ ReaderEvent::Characters(s) => {
+ self.append_text_node(s);
+ },
+ ReaderEvent::CData(s) => {
+ self.append_text_node(s);
+ },
+ ReaderEvent::EndDocument => {
+ return Err(Error::EndOfDocument);
+ },
+ _ => (), // TODO: may need to implement more
+ }
+ }
+ }
+
+ pub fn write_to<W: Write>(&self, writer: &mut EventWriter<W>) -> Result<(), Error> {
+ let mut start = WriterEvent::start_element(self.name.borrow());
+ if let Some(ref ns) = self.name.namespace {
+ start = start.default_ns(ns.as_ref());
+ }
+ for attr in &self.attributes { // TODO: I think this could be done a lot more efficiently
+ start = start.attr(attr.name.borrow(), &attr.value);
+ }
+ writer.write(start)?;
+ for child in &self.children {
+ match *child {
+ Fork::Element(ref e) => {
+ e.write_to(writer)?;
+ },
+ Fork::Text(ref s) => {
+ writer.write(WriterEvent::characters(s))?;
+ },
+ }
+ }
+ writer.write(WriterEvent::end_element())?;
+ Ok(())
+ }
+
+ pub fn children<'a>(&'a self) -> Children<'a> {
+ unimplemented!();
+ }
+
+ pub fn children_mut<'a>(&'a mut self) -> ChildrenMut<'a> {
+ unimplemented!();
+ }
+
+ pub fn append_child(&mut self, child: Element) -> &mut Element {
+ self.children.push(Fork::Element(child));
+ if let Fork::Element(ref mut cld) = *self.children.last_mut().unwrap() {
+ cld
+ }
+ else {
+ unreachable!()
+ }
+ }
+
+ pub fn append_text_node<S: Into<String>>(&mut self, child: S) {
+ self.children.push(Fork::Text(child.into()));
+ }
+
+ pub fn text(&self) -> &str {
+ unimplemented!()
+ }
+
+ pub fn get_child<'a, N: Into<Name<'a>>>(&self, name: N) -> Option<&Element> {
+ unimplemented!()
+ }
+
+ pub fn get_child_mut<'a, N: Into<Name<'a>>>(&mut self, name: N) -> Option<&mut Element> {
+ unimplemented!()
+ }
+
+ pub fn into_child<'a, N: Into<Name<'a>>>(self, name: N) -> Option<Element> {
+ unimplemented!()
+ }
+}
+
+pub struct Children<'a> {
+ elem: &'a Element,
+}
+
+pub struct ChildrenMut<'a> {
+ elem: &'a mut Element,
+}
+
+pub struct ElementBuilder {
+ name: OwnedName,
+ attributes: Vec<OwnedAttribute>,
+}
+
+impl ElementBuilder {
+ pub fn ns<S: Into<String>>(mut self, namespace: S) -> ElementBuilder {
+ self.name.namespace = Some(namespace.into());
+ self
+ }
+
+ pub fn attr<S: Into<String>, V: Into<String>>(mut self, name: S, value: V) -> ElementBuilder {
+ self.attributes.push(OwnedAttribute::new(OwnedName::local(name), value));
+ self
+ }
+
+ pub fn attr_ns<S: Into<String>, N: Into<String>, V: Into<String>>(mut self, name: S, namespace: N, value: V) -> ElementBuilder {
+ self.attributes.push(OwnedAttribute::new(OwnedName::qualified::<_, _, &'static str>(name, namespace, None), value));
+ self
+ }
+
+ pub fn build(self) -> Element {
+ Element::new(self.name, self.attributes)
+ }
+}
+
+#[cfg(test)]
+mod tests {
+ use super::*;
+
+ const TEST_STRING: &'static str = r#"<?xml version="1.0" encoding="utf-8"?><root xmlns="root_ns" a="b">meow<child c="d" /><child xmlns="child_ns" d="e" />nya</root>"#;
+
+ fn build_test_tree() -> Element {
+ let mut root = Element::builder("root")
+ .ns("root_ns")
+ .attr("a", "b")
+ .build();
+ root.append_text_node("meow");
+ let child = Element::builder("child")
+ .attr("c", "d")
+ .build();
+ root.append_child(child);
+ let other_child = Element::builder("child")
+ .ns("child_ns")
+ .attr("d", "e")
+ .build();
+ root.append_child(other_child);
+ root.append_text_node("nya");
+ root
+ }
+
+ #[test]
+ fn reader_works() {
+ use std::io::Cursor;
+ let mut reader = EventReader::new(Cursor::new(TEST_STRING));
+ // TODO: fix a bunch of namespace stuff so this test passes
+ assert_eq!(Element::from_reader(&mut reader).unwrap(), build_test_tree());
+ }
+
+ #[test]
+ fn writer_works() {
+ let root = build_test_tree();
+ let mut out = Vec::new();
+ {
+ let mut writer = EventWriter::new(&mut out);
+ root.write_to(&mut writer);
+ }
+ assert_eq!(String::from_utf8(out).unwrap(), TEST_STRING);
+ }
+
+ #[test]
+ fn builder_works() {
+ let elem = Element::builder("a")
+ .ns("b")
+ .attr("c", "d")
+ .build();
+ assert_eq!(elem.tag(), "a");
+ assert_eq!(elem.ns(), Some("b"));
+ assert_eq!(elem.attr("c"), Some("d"));
+ }
+}