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
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218

use crate::PrettyPrint;
use alloc::borrow::Cow;
use core::fmt::{Debug, Formatter};
use pretty::{
    termcolor::{Color, ColorSpec},
    Arena, DocAllocator, DocBuilder, Pretty,
};

/// Represents a pretty-printable tree.
pub type PrettyTree<'a> = DocBuilder<'a, Arena<'a, ColorSpec>, ColorSpec>;

/// Represents a pretty-printable tree provider.
pub struct PrettyProvider<'a> {
    arena: Arena<'a, ColorSpec>,
    keyword: ColorSpec,
    string: ColorSpec,
    number: ColorSpec,
    macros: ColorSpec,
    argument: ColorSpec,
    argument_mut: ColorSpec,
    local: ColorSpec,
    local_mut: ColorSpec,
    operator: ColorSpec,
    structure: ColorSpec,
    interface: ColorSpec,
}

impl<'a> Debug for PrettyProvider<'a> {
    fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
        f.debug_struct("PrettyProvider").finish()
    }
}

impl<'a> PrettyProvider<'a> {
    /// Creates a new pretty-printable tree provider.
    pub fn new() -> Self {
        let argument = Color::Rgb(239, 112, 117);
        let purple = Color::Rgb(197, 119, 207);
        let local = Color::Rgb(152, 195, 121);
        let green = Color::Rgb(152, 195, 121);
        PrettyProvider {
            arena: Arena::new(),
            keyword: ColorSpec::new().set_fg(Some(purple)).clone(),
            string: ColorSpec::new().set_fg(Some(green)).clone(),
            number: ColorSpec::new().set_fg(Some(Color::Rgb(206, 153, 100))).clone(),
            macros: ColorSpec::new().set_fg(Some(Color::Rgb(87, 182, 194))).clone(),
            argument: ColorSpec::new().set_fg(Some(argument)).clone(),
            argument_mut: ColorSpec::new().set_fg(Some(argument)).set_underline(true).clone(),
            local: ColorSpec::new().set_fg(Some(local)).clone(),
            local_mut: ColorSpec::new().set_fg(Some(local)).set_underline(true).clone(),
            operator: ColorSpec::new().set_fg(Some(Color::Rgb(90, 173, 238))).clone(),
            structure: ColorSpec::new().set_fg(Some(Color::Rgb(197, 119, 207))).clone(),
            interface: ColorSpec::new().set_fg(Some(Color::Rgb(197, 119, 207))).clone(),
        }
    }
}

impl<'a> PrettyProvider<'a> {
    /// Creates a new pretty-printable tree provider.
    pub fn nil(&'a self) -> PrettyTree<'a> {
        self.arena.nil()
    }
    /// Creates a new pretty-printable tree provider.
    pub fn space(&'a self) -> PrettyTree<'a> {
        self.arena.space()
    }
    /// Creates a new pretty-printable tree provider.
    pub fn hardline(&'a self) -> PrettyTree<'a> {
        self.arena.hardline()
    }
    /// Allocate a document containing the given text.
    ///
    /// The given text must not contain line breaks.
    pub fn text<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.arena.text(text.into())
    }
    /// Allocate a document containing the given text.
    pub fn keyword<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.keyword.clone())
    }
    /// Allocate a document containing the given text.
    pub fn identifier<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.operator(text)
    }
    /// Allocate a document containing the given text.
    pub fn generic<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.macros.clone())
    }

    /// Allocate a document containing the given text.
    pub fn variable<'i, S>(&'a self, text: S, mutable: bool) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        if mutable { self.text(text).annotate(self.local_mut.clone()) } else { self.text(text).annotate(self.local.clone()) }
    }

    /// Allocate a document containing the given text.
    pub fn argument<'i, S>(&'a self, text: S, mutable: bool) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        if mutable {
            self.text(text).annotate(self.argument_mut.clone())
        }
        else {
            self.text(text).annotate(self.argument.clone())
        }
    }
    /// Allocate a document containing the given text.
    pub fn operator<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.operator.clone())
    }
    /// Allocate a document containing the given text.
    pub fn string<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.string.clone())
    }
    /// Allocate a document containing the given text.
    pub fn metadata<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.macros.clone())
    }

    /// Allocate a document containing the given text.
    pub fn number<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.number.clone())
    }
    /// Allocate a document containing the given text.
    pub fn structure<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.structure.clone())
    }
    /// Allocate a document containing the given text.
    pub fn interface<'i, S>(&'a self, text: S) -> PrettyTree<'a>
    where
        S: Into<Cow<'i, str>>,
        'i: 'a,
    {
        self.text(text).annotate(self.interface.clone())
    }
}

impl<'a> PrettyProvider<'a> {
    /// Allocate a document concatenating the given documents.
    #[inline]
    pub fn concat<I>(&'a self, docs: I) -> PrettyTree<'a>
    where
        I: IntoIterator,
        I::Item: Pretty<'a, Arena<'a, ColorSpec>, ColorSpec>,
    {
        self.arena.concat(docs)
    }
    /// Allocate a document that intersperses the given separator `S` between the given documents
    /// `[A, B, C, ..., Z]`, yielding `[A, S, B, S, C, S, ..., S, Z]`.
    ///
    /// Compare [the `intersperse` method from the `itertools` crate](https://docs.rs/itertools/0.5.9/itertools/trait.Itertools.html#method.intersperse).
    ///
    /// NOTE: The separator type, `S` may need to be cloned. Consider using cheaply cloneable ptr
    /// like `RefDoc` or `RcDoc`
    #[inline]
    pub fn intersperse<T, S>(&'a self, terms: &[T], joint: S) -> PrettyTree<'a>
    where
        T: PrettyPrint,
        S: Pretty<'a, Arena<'a, ColorSpec>, ColorSpec> + Clone,
    {
        self.arena.intersperse(terms.iter().map(|x| x.build(self)), joint)
    }
    /// Allocate a document that intersperses the given separator `S` between the given documents
    /// `[A, B, C, ..., Z]`, yielding `[A, S, B, S, C, S, ..., S, Z]`.
    ///
    /// Compare [the `intersperse` method from the `itertools` crate](https://docs.rs/itertools/0.5.9/itertools/trait.Itertools.html#method.intersperse).
    ///
    /// NOTE: The separator type, `S` may need to be cloned. Consider using cheaply cloneable ptr
    /// like `RefDoc` or `RcDoc`
    #[inline]
    pub fn join<T>(&'a self, terms: &[T], joint: &'static str) -> PrettyTree<'a>
    where
        T: PrettyPrint,
    {
        self.arena.intersperse(terms.iter().map(|x| x.build(self)), self.arena.text(joint))
    }
}