1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187

use std::sync::{
    Arc,
    Mutex,
};

use freya_common::{
    CompositorDirtyNodes,
    ParagraphElements,
};
use freya_engine::prelude::*;
use freya_native_core::{
    attributes::AttributeName,
    exports::shipyard::Component,
    node::OwnedAttributeValue,
    node_ref::NodeView,
    prelude::{
        AttributeMaskBuilder,
        Dependancy,
        NodeMaskBuilder,
        OwnedAttributeView,
        State,
    },
    tags::TagName,
    NodeId,
    SendAnyMap,
};
use freya_native_core_macro::partial_derive_state;

use crate::{
    CursorMode,
    CursorReference,
    CustomAttributeValues,
    HighlightMode,
    Parse,
    ParseAttribute,
    ParseError,
};

#[derive(Clone, Debug, PartialEq, Component)]
pub struct CursorState {
    pub position: Option<i32>,
    pub color: Color,
    pub mode: CursorMode,
    pub cursor_id: Option<usize>,
    pub highlights: Option<Vec<(usize, usize)>>,
    pub highlight_color: Color,
    pub highlight_mode: HighlightMode,
    pub cursor_ref: Option<CursorReference>,
}

impl Default for CursorState {
    fn default() -> Self {
        Self {
            position: None,
            color: Color::BLACK,
            mode: CursorMode::None,
            cursor_id: None,
            highlights: None,
            highlight_color: Color::from_rgb(87, 108, 188),
            highlight_mode: HighlightMode::default(),
            cursor_ref: None,
        }
    }
}

impl ParseAttribute for CursorState {
    fn parse_attribute(
        &mut self,
        attr: OwnedAttributeView<CustomAttributeValues>,
    ) -> Result<(), crate::ParseError> {
        match attr.attribute {
            AttributeName::CursorIndex => {
                if let Some(value) = attr.value.as_text() {
                    if value != "none" {
                        self.position = Some(value.parse().map_err(|_| ParseError)?);
                    }
                }
            }
            AttributeName::CursorColor => {
                if let Some(value) = attr.value.as_text() {
                    self.color = Color::parse(value)?;
                }
            }
            AttributeName::CursorMode => {
                if let Some(value) = attr.value.as_text() {
                    self.mode = CursorMode::parse(value)?;
                }
            }
            AttributeName::CursorId => {
                if let Some(value) = attr.value.as_text() {
                    self.cursor_id = Some(value.parse().map_err(|_| ParseError)?);
                }
            }
            AttributeName::Highlights => {
                if let Some(CustomAttributeValues::TextHighlights(highlights)) =
                    attr.value.as_custom()
                {
                    self.highlights = Some(highlights.clone());
                }
            }
            AttributeName::HighlightColor => {
                if let Some(value) = attr.value.as_text() {
                    self.highlight_color = Color::parse(value)?;
                }
            }
            AttributeName::HighlightMode => {
                if let Some(value) = attr.value.as_text() {
                    self.highlight_mode = HighlightMode::parse(value)?;
                }
            }
            AttributeName::CursorReference => {
                if let OwnedAttributeValue::Custom(CustomAttributeValues::CursorReference(
                    reference,
                )) = attr.value
                {
                    self.cursor_ref = Some(reference.clone());
                }
            }
            _ => {}
        }

        Ok(())
    }
}

#[partial_derive_state]
impl State<CustomAttributeValues> for CursorState {
    type ParentDependencies = (Self,);

    type ChildDependencies = ();

    type NodeDependencies = ();

    const NODE_MASK: NodeMaskBuilder<'static> = NodeMaskBuilder::new()
        .with_attrs(AttributeMaskBuilder::Some(&[
            AttributeName::CursorIndex,
            AttributeName::CursorColor,
            AttributeName::CursorMode,
            AttributeName::CursorId,
            AttributeName::Highlights,
            AttributeName::HighlightColor,
            AttributeName::HighlightMode,
            AttributeName::CursorReference,
        ]))
        .with_tag();

    fn update<'a>(
        &mut self,
        node_view: NodeView<CustomAttributeValues>,
        _node: <Self::NodeDependencies as Dependancy>::ElementBorrowed<'a>,
        parent: Option<<Self::ParentDependencies as Dependancy>::ElementBorrowed<'a>>,
        _children: Vec<<Self::ChildDependencies as Dependancy>::ElementBorrowed<'a>>,
        context: &SendAnyMap,
    ) -> bool {
        let root_id = context.get::<NodeId>().unwrap();
        let paragraphs = context.get::<Arc<Mutex<ParagraphElements>>>().unwrap();
        let compositor_dirty_nodes = context.get::<Arc<Mutex<CompositorDirtyNodes>>>().unwrap();
        let mut cursor = parent.map(|(p,)| p.clone()).unwrap_or_default();

        if let Some(attributes) = node_view.attributes() {
            for attr in attributes {
                cursor.parse_safe(attr);
            }
        }
        let changed = &cursor != self;

        let is_orphan = node_view.height() == 0 && node_view.node_id() != *root_id;

        if changed && CursorMode::Editable == cursor.mode && !is_orphan {
            if let Some((tag, cursor_ref)) = node_view.tag().zip(cursor.cursor_ref.as_ref()) {
                if *tag == TagName::Paragraph {
                    paragraphs
                        .lock()
                        .unwrap()
                        .insert_paragraph(node_view.node_id(), cursor_ref.text_id)
                }
            }
            compositor_dirty_nodes
                .lock()
                .unwrap()
                .invalidate(node_view.node_id());
        }

        *self = cursor;
        changed
    }
}