omena-scss-eval 0.3.0

Oracle-first SCSS and Less value evaluator rail for Omena CSS
Documentation 
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

use omena_abstract_value::{AbstractCssValueV0, abstract_css_value_from_text};

use crate::abstract_css_value_kind;

use super::{
    OmenaScssEvalStaticValueResolutionV0, static_scss_function_value_contains_any_callable,
};

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(super) enum StaticStylesheetResolutionOutcome {
    Resolved,
    Raw,
    Top,
}

impl StaticStylesheetResolutionOutcome {
    fn label(self) -> &'static str {
        match self {
            Self::Resolved => "resolved",
            Self::Raw => "raw",
            Self::Top => "top",
        }
    }
}

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub(super) enum StaticStylesheetResolutionReason {
    Resolved,
    Cycle,
    FuelExhausted,
    UnresolvedReference,
    UnsupportedDynamic,
}

impl StaticStylesheetResolutionReason {
    fn label(self) -> &'static str {
        match self {
            Self::Resolved => "resolved",
            Self::Cycle => "cycle",
            Self::FuelExhausted => "fuelExhausted",
            Self::UnresolvedReference => "unresolvedReference",
            Self::UnsupportedDynamic => "unsupportedDynamic",
        }
    }
}

#[derive(Debug, Clone, PartialEq, Eq)]
pub(super) struct StaticStylesheetAbstractResolution {
    pub(super) rendered_value: Option<String>,
    pub(super) abstract_value: AbstractCssValueV0,
    pub(super) outcome: StaticStylesheetResolutionOutcome,
    pub(super) reason: StaticStylesheetResolutionReason,
}

pub(super) fn static_value_resolution_record(
    name: &str,
    start: usize,
    end: usize,
    source_text: &str,
    resolution: StaticStylesheetAbstractResolution,
) -> OmenaScssEvalStaticValueResolutionV0 {
    OmenaScssEvalStaticValueResolutionV0 {
        name: name.to_string(),
        start,
        end,
        source_text: source_text.to_string(),
        rendered_value: resolution.rendered_value,
        abstract_value_kind: abstract_css_value_kind(&resolution.abstract_value),
        abstract_value: resolution.abstract_value,
        outcome: resolution.outcome.label(),
        reason: resolution.reason.label(),
    }
}

pub(super) fn resolved_static_abstract_value(text: &str) -> StaticStylesheetAbstractResolution {
    let abstract_value = abstract_css_value_from_text(text);
    let rendered_value = render_static_abstract_value(&abstract_value);
    let outcome = if matches!(abstract_value, AbstractCssValueV0::Raw { .. }) {
        StaticStylesheetResolutionOutcome::Raw
    } else {
        StaticStylesheetResolutionOutcome::Resolved
    };
    let reason = if outcome == StaticStylesheetResolutionOutcome::Raw {
        StaticStylesheetResolutionReason::UnsupportedDynamic
    } else {
        StaticStylesheetResolutionReason::Resolved
    };
    StaticStylesheetAbstractResolution {
        rendered_value,
        abstract_value,
        outcome,
        reason,
    }
}

pub(super) fn resolved_static_abstract_value_preserving_callable_raw(
    original_text: &str,
    reduced_text: &str,
) -> StaticStylesheetAbstractResolution {
    let abstract_value = abstract_css_value_from_text(reduced_text);
    if matches!(abstract_value, AbstractCssValueV0::Raw { .. })
        && static_scss_function_value_contains_any_callable(reduced_text)
    {
        return raw_static_abstract_value(
            original_text,
            StaticStylesheetResolutionReason::UnsupportedDynamic,
        );
    }
    resolved_static_abstract_value(reduced_text)
}

pub(super) fn raw_static_abstract_value(
    text: &str,
    reason: StaticStylesheetResolutionReason,
) -> StaticStylesheetAbstractResolution {
    StaticStylesheetAbstractResolution {
        rendered_value: Some(text.to_string()),
        abstract_value: AbstractCssValueV0::Raw {
            value: text.to_string(),
        },
        outcome: StaticStylesheetResolutionOutcome::Raw,
        reason,
    }
}

pub(super) fn top_static_abstract_value(
    reason: StaticStylesheetResolutionReason,
) -> StaticStylesheetAbstractResolution {
    StaticStylesheetAbstractResolution {
        rendered_value: None,
        abstract_value: AbstractCssValueV0::Top,
        outcome: StaticStylesheetResolutionOutcome::Top,
        reason,
    }
}

pub(super) fn render_static_abstract_value(value: &AbstractCssValueV0) -> Option<String> {
    match value {
        AbstractCssValueV0::Bottom => Some(String::new()),
        AbstractCssValueV0::Exact { value, .. } | AbstractCssValueV0::Raw { value } => {
            Some(value.clone())
        }
        AbstractCssValueV0::FiniteSet { values, .. } => values.first().cloned(),
        AbstractCssValueV0::Top => None,
    }
}