script/dom/
text.rs

1/* This Source Code Form is subject to the terms of the Mozilla Public
2 * License, v. 2.0. If a copy of the MPL was not distributed with this
3 * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
4
5use dom_struct::dom_struct;
6use js::rust::HandleObject;
7
8use crate::dom::bindings::codegen::Bindings::CharacterDataBinding::CharacterDataMethods;
9use crate::dom::bindings::codegen::Bindings::DocumentBinding::DocumentMethods;
10use crate::dom::bindings::codegen::Bindings::NodeBinding::NodeMethods;
11use crate::dom::bindings::codegen::Bindings::TextBinding::TextMethods;
12use crate::dom::bindings::codegen::Bindings::WindowBinding::WindowMethods;
13use crate::dom::bindings::error::{Error, Fallible};
14use crate::dom::bindings::inheritance::Castable;
15use crate::dom::bindings::root::{Dom, DomRoot};
16use crate::dom::bindings::str::DOMString;
17use crate::dom::characterdata::CharacterData;
18use crate::dom::document::Document;
19use crate::dom::globalscope::GlobalScope;
20use crate::dom::html::htmlslotelement::{HTMLSlotElement, Slottable};
21use crate::dom::node::Node;
22use crate::dom::window::Window;
23use crate::script_runtime::CanGc;
24
25/// An HTML text node.
26#[dom_struct]
27pub(crate) struct Text {
28    characterdata: CharacterData,
29}
30
31impl Text {
32    pub(crate) fn new_inherited(text: DOMString, document: &Document) -> Text {
33        Text {
34            characterdata: CharacterData::new_inherited(text, document),
35        }
36    }
37
38    pub(crate) fn new(text: DOMString, document: &Document, can_gc: CanGc) -> DomRoot<Text> {
39        Self::new_with_proto(text, document, None, can_gc)
40    }
41
42    fn new_with_proto(
43        text: DOMString,
44        document: &Document,
45        proto: Option<HandleObject>,
46        can_gc: CanGc,
47    ) -> DomRoot<Text> {
48        Node::reflect_node_with_proto(
49            Box::new(Text::new_inherited(text, document)),
50            document,
51            proto,
52            can_gc,
53        )
54    }
55}
56
57impl TextMethods<crate::DomTypeHolder> for Text {
58    // https://dom.spec.whatwg.org/#dom-text-text
59    fn Constructor(
60        window: &Window,
61        proto: Option<HandleObject>,
62        can_gc: CanGc,
63        text: DOMString,
64    ) -> Fallible<DomRoot<Text>> {
65        let document = window.Document();
66        Ok(Text::new_with_proto(text, &document, proto, can_gc))
67    }
68
69    // https://dom.spec.whatwg.org/#dom-text-splittext
70    // https://dom.spec.whatwg.org/#concept-text-split
71    fn SplitText(&self, offset: u32, can_gc: CanGc) -> Fallible<DomRoot<Text>> {
72        let cdata = self.upcast::<CharacterData>();
73        // Step 1.
74        let length = cdata.Length();
75        if offset > length {
76            // Step 2.
77            return Err(Error::IndexSize);
78        }
79        // Step 3.
80        let count = length - offset;
81        // Step 4.
82        let new_data = cdata.SubstringData(offset, count).unwrap();
83        // Step 5.
84        let node = self.upcast::<Node>();
85        let owner_doc = node.owner_doc();
86        let new_node = owner_doc.CreateTextNode(new_data, can_gc);
87        // Step 6.
88        let parent = node.GetParentNode();
89        if let Some(ref parent) = parent {
90            // Step 7.1.
91            parent
92                .InsertBefore(new_node.upcast(), node.GetNextSibling().as_deref(), can_gc)
93                .unwrap();
94            // Steps 7.2-3.
95            node.ranges()
96                .move_to_following_text_sibling_above(node, offset, new_node.upcast());
97            // Steps 7.4-5.
98            parent.ranges().increment_at(parent, node.index() + 1);
99        }
100        // Step 8.
101        cdata.DeleteData(offset, count).unwrap();
102        // Step 9.
103        Ok(new_node)
104    }
105
106    // https://dom.spec.whatwg.org/#dom-text-wholetext
107    fn WholeText(&self) -> DOMString {
108        let first = self
109            .upcast::<Node>()
110            .inclusively_preceding_siblings()
111            .take_while(|node| node.is::<Text>())
112            .last()
113            .unwrap();
114        let nodes = first
115            .inclusively_following_siblings()
116            .take_while(|node| node.is::<Text>());
117        let mut text = String::new();
118        for ref node in nodes {
119            let cdata = node.downcast::<CharacterData>().unwrap();
120            text.push_str(&cdata.data());
121        }
122        DOMString::from(text)
123    }
124
125    /// <https://dom.spec.whatwg.org/#dom-slotable-assignedslot>
126    fn GetAssignedSlot(&self) -> Option<DomRoot<HTMLSlotElement>> {
127        let cx = GlobalScope::get_cx();
128
129        // > The assignedSlot getter steps are to return the result of
130        // > find a slot given this and with the open flag set.
131        rooted!(in(*cx) let slottable = Slottable(Dom::from_ref(self.upcast::<Node>())));
132        slottable.find_a_slot(true)
133    }
134}
script/dom/text.rs

script/dom/
text.rs
