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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
//! DOM bindings for `CharacterData`.
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::CharacterDataBinding::CharacterDataMethods;
use dom::bindings::codegen::InheritTypes::NodeCast;
use dom::bindings::codegen::InheritTypes::{CharacterDataDerived, ElementCast};
use dom::bindings::codegen::UnionTypes::NodeOrString;
use dom::bindings::error::Error::IndexSize;
use dom::bindings::error::{Fallible, ErrorResult};
use dom::bindings::js::{LayoutJS, Root};
use dom::document::Document;
use dom::element::Element;
use dom::eventtarget::{EventTarget, EventTargetTypeId};
use dom::node::{Node, NodeTypeId};
use util::str::{DOMString, slice_chars};
use std::borrow::ToOwned;
use std::cell::Ref;
// https://dom.spec.whatwg.org/#characterdata
#[dom_struct]
pub struct CharacterData {
node: Node,
data: DOMRefCell<DOMString>,
}
impl CharacterDataDerived for EventTarget {
fn is_characterdata(&self) -> bool {
match *self.type_id() {
EventTargetTypeId::Node(NodeTypeId::CharacterData(_)) => true,
_ => false
}
}
}
impl CharacterData {
pub fn new_inherited(id: CharacterDataTypeId, data: DOMString, document: &Document) -> CharacterData {
CharacterData {
node: Node::new_inherited(NodeTypeId::CharacterData(id), document),
data: DOMRefCell::new(data),
}
}
}
impl<'a> CharacterDataMethods for &'a CharacterData {
// https://dom.spec.whatwg.org/#dom-characterdata-data
fn Data(self) -> DOMString {
self.data.borrow().clone()
}
// https://dom.spec.whatwg.org/#dom-characterdata-data
fn SetData(self, data: DOMString) {
*self.data.borrow_mut() = data;
}
// https://dom.spec.whatwg.org/#dom-characterdata-length
fn Length(self) -> u32 {
self.data.borrow().chars().count() as u32
}
// https://dom.spec.whatwg.org/#dom-characterdata-substringdataoffset-count
fn SubstringData(self, offset: u32, count: u32) -> Fallible<DOMString> {
let data = self.data.borrow();
// Step 1.
let length = data.chars().count() as u32;
if offset > length {
// Step 2.
return Err(IndexSize);
}
// Steps 3-4.
let end = if length - offset < count { length } else { offset + count };
Ok(slice_chars(&*data, offset as usize, end as usize).to_owned())
}
// https://dom.spec.whatwg.org/#dom-characterdata-appenddatadata
fn AppendData(self, data: DOMString) {
self.append_data(&*data);
}
// https://dom.spec.whatwg.org/#dom-characterdata-insertdataoffset-data
fn InsertData(self, offset: u32, arg: DOMString) -> ErrorResult {
self.ReplaceData(offset, 0, arg)
}
// https://dom.spec.whatwg.org/#dom-characterdata-deletedataoffset-count
fn DeleteData(self, offset: u32, count: u32) -> ErrorResult {
self.ReplaceData(offset, count, "".to_owned())
}
// https://dom.spec.whatwg.org/#dom-characterdata-replacedataoffset-count-data
fn ReplaceData(self, offset: u32, count: u32, arg: DOMString) -> ErrorResult {
// Step 1.
let length = self.data.borrow().chars().count() as u32;
if offset > length {
// Step 2.
return Err(IndexSize);
}
// Step 3.
let count = match length - offset {
diff if diff < count => diff,
_ => count,
};
// Step 4: Mutation observers.
// Step 5.
let mut data = slice_chars(&*self.data.borrow(), 0, offset as usize).to_owned();
data.push_str(&arg);
data.push_str(slice_chars(&*self.data.borrow(), (offset + count) as usize, length as usize));
*self.data.borrow_mut() = data;
// FIXME: Once we have `Range`, we should implement step7 to step11
Ok(())
}
// https://dom.spec.whatwg.org/#dom-childnode-before
fn Before(self, nodes: Vec<NodeOrString>) -> ErrorResult {
NodeCast::from_ref(self).before(nodes)
}
// https://dom.spec.whatwg.org/#dom-childnode-after
fn After(self, nodes: Vec<NodeOrString>) -> ErrorResult {
NodeCast::from_ref(self).after(nodes)
}
// https://dom.spec.whatwg.org/#dom-childnode-replacewith
fn ReplaceWith(self, nodes: Vec<NodeOrString>) -> ErrorResult {
NodeCast::from_ref(self).replace_with(nodes)
}
// https://dom.spec.whatwg.org/#dom-childnode-remove
fn Remove(self) {
let node = NodeCast::from_ref(self);
node.remove_self();
}
// https://dom.spec.whatwg.org/#dom-nondocumenttypechildnode-previouselementsibling
fn GetPreviousElementSibling(self) -> Option<Root<Element>> {
NodeCast::from_ref(self).preceding_siblings()
.filter_map(ElementCast::to_root).next()
}
// https://dom.spec.whatwg.org/#dom-nondocumenttypechildnode-nextelementsibling
fn GetNextElementSibling(self) -> Option<Root<Element>> {
NodeCast::from_ref(self).following_siblings()
.filter_map(ElementCast::to_root).next()
}
}
/// The different types of CharacterData.
#[derive(JSTraceable, Copy, Clone, PartialEq, Debug, HeapSizeOf)]
pub enum CharacterDataTypeId {
Comment,
Text,
ProcessingInstruction,
}
impl CharacterData {
#[inline]
pub fn data(&self) -> Ref<DOMString> {
self.data.borrow()
}
#[inline]
pub fn append_data(&self, data: &str) {
self.data.borrow_mut().push_str(data)
}
}
#[allow(unsafe_code)]
pub trait LayoutCharacterDataHelpers {
unsafe fn data_for_layout<'a>(&'a self) -> &'a str;
}
#[allow(unsafe_code)]
impl LayoutCharacterDataHelpers for LayoutJS<CharacterData> {
#[inline]
unsafe fn data_for_layout<'a>(&'a self) -> &'a str {
&(*self.unsafe_get()).data.borrow_for_layout()
}
}
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