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

use cssparser::{serialize_identifier, SourceLocation};
use parcel_sourcemap::{SourceMap, OriginalLocation};
use crate::vendor_prefix::VendorPrefix;
use crate::targets::Browsers;
use crate::css_modules::CssModule;
use crate::dependencies::Dependency;
use crate::error::{PrinterError, PrinterErrorKind, Error, ErrorLocation};
use crate::rules::Location;

#[derive(Default, Debug)]
pub struct PseudoClasses<'a> {
  pub hover: Option<&'a str>,
  pub active: Option<&'a str>,
  pub focus: Option<&'a str>,
  pub focus_visible: Option<&'a str>,
  pub focus_within: Option<&'a str>
}

pub(crate) struct Printer<'a, W> {
  pub sources: Option<&'a Vec<String>>,
  dest: &'a mut W,
  source_map: Option<&'a mut SourceMap>,
  pub source_index: u32,
  indent: u8,
  line: u32,
  col: u32,
  pub minify: bool,
  pub targets: Option<Browsers>,
  /// Vendor prefix override. When non-empty, it overrides 
  /// the vendor prefix of whatever is being printed.
  pub vendor_prefix: VendorPrefix,
  pub in_calc: bool,
  pub css_module: Option<CssModule<'a>>,
  pub dependencies: Option<&'a mut Vec<Dependency>>,
  pub pseudo_classes: Option<PseudoClasses<'a>>
}

impl<'a, W: std::fmt::Write + Sized> Printer<'a, W> {
  pub fn new(
    dest: &'a mut W,
    source_map: Option<&'a mut SourceMap>,
    minify: bool,
    targets: Option<Browsers>
  ) -> Printer<'a, W> {
    Printer {
      sources: None,
      dest,
      source_map,
      source_index: 0,
      indent: 0,
      line: 0,
      col: 0,
      minify,
      targets,
      vendor_prefix: VendorPrefix::empty(),
      in_calc: false,
      css_module: None,
      dependencies: None,
      pseudo_classes: None
    }
  }

  pub fn filename(&self) -> &str {
    if let Some(sources) = self.sources {
      if let Some(f) = sources.get(self.source_index as usize) {
        f
      } else {
        "unknown.css"
      }
    } else {
      "unknown.css"
    }
  }

  pub fn write_str(&mut self, s: &str) -> Result<(), PrinterError> {
    self.col += s.len() as u32;
    self.dest.write_str(s)?;
    Ok(())
  }

  pub fn write_char(&mut self, c: char) -> Result<(), PrinterError> {
    if c == '\n' {
      self.line += 1;
      self.col = 0;
    } else {
      self.col += 1;
    }
    self.dest.write_char(c)?;
    Ok(())
  }

  pub fn whitespace(&mut self) -> Result<(), PrinterError> {
    if self.minify {
      return Ok(())
    }

    self.write_char(' ')
  }

  pub fn delim(&mut self, delim: char, ws_before: bool) -> Result<(), PrinterError> {
    if ws_before {
      self.whitespace()?;
    }
    self.write_char(delim)?;
    self.whitespace()
  }

  pub fn newline(&mut self) -> Result<(), PrinterError> {
    if self.minify {
      return Ok(())
    }

    self.write_char('\n')?;
    if self.indent > 0 {
      self.write_str(&" ".repeat(self.indent as usize))?;
    }

    Ok(())
  }

  pub fn indent(&mut self) {
    self.indent += 2;
  }

  pub fn dedent(&mut self) {
    self.indent -= 2;
  }

  pub fn indent_by(&mut self, amt: u8) {
    self.indent += amt;
  }

  pub fn dedent_by(&mut self, amt: u8) {
    self.indent -= amt;
  }

  pub fn is_nested(&self) -> bool {
    self.indent > 2
  }

  pub fn add_mapping(&mut self, loc: Location) {
    self.source_index = loc.source_index;
    if let Some(map) = &mut self.source_map {
      map.add_mapping(self.line, self.col, Some(OriginalLocation {
        original_line: loc.line,
        original_column: loc.column - 1,
        source: loc.source_index,
        name: None
      }))
    }
  }

  pub fn write_ident(&mut self, ident: &str) -> Result<(), PrinterError> {
    serialize_identifier(ident, self)?;
    let hash = if let Some(css_module) = &self.css_module {
      Some(css_module.hash)
    } else {
      None
    };

    if let Some(hash) = hash {
      self.write_char('_')?;
      self.write_str(hash)?;
      if self.source_index > 0 {
        self.write_str(&format!("_{}", self.source_index))?;
      }
    }

    if let Some(css_module) = &mut self.css_module {
      css_module.add_local(&ident, &ident);
    }

    Ok(())
  }

  pub fn error(&self, kind: PrinterErrorKind, loc: SourceLocation) -> Error<PrinterErrorKind> {
    Error {
      kind,
      loc: Some(ErrorLocation {
        filename: self.filename().into(),
        line: loc.line,
        column: loc.column
      })
    }
  }
}

impl<'a, W: std::fmt::Write + Sized> std::fmt::Write for Printer<'a, W> {
  fn write_str(&mut self, s: &str) -> std::fmt::Result {
    self.col += s.len() as u32;
    self.dest.write_str(s)
  }
}