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

pub trait FormatAttribute {
    fn format_attribute(&self) -> String;
}

impl<T> FormatAttribute for Vec<T>
where
    T: FormatAttribute,
{
    fn format_attribute(&self) -> String {
        let mut out = String::new();

        let mut it = self.iter().peekable();

        while let Some(next) = it.next() {
            out.push_str(&next.format_attribute());

            if !it.peek().is_none() {
                out.push_str(" ");
            }
        }

        out
    }
}

impl<'a> FormatAttribute for &'a str {
    fn format_attribute(&self) -> String {
        (*self).to_owned()
    }
}

impl FormatAttribute for String {
    fn format_attribute(&self) -> String {
        self.clone()
    }
}

#[macro_export]
macro_rules! define_processor {
    ($name:ident, $body:ty, $slf:ident, $($tail:tt)*) => (
        pub struct $name<'env> {
            pub out: ::std::cell::RefCell<DocBuilder<'env>>,
            pub env: &'env Environment,
            pub syntax: (&'env ::syntect::highlighting::Theme, &'env ::syntect::parsing::SyntaxSet),
            pub root: &'env str,
            pub body: &'env $body,
        }

        impl<'env> Processor<'env> for $name<'env> {
            fn env(&self) -> &'env Environment {
                self.env
            }

            fn out(&self) -> ::std::cell::RefMut<DocBuilder<'env>> {
                self.out.borrow_mut()
            }

            fn root(&self) -> &'env str {
                self.root
            }

            fn syntax(&self) -> (
                &'env ::syntect::highlighting::Theme,
                &'env ::syntect::parsing::SyntaxSet,
            ) {
                self.syntax
            }

            define_processor!(@tail $slf $($tail)*);
        }
    );

    (@tail $slf:ident process => $body:block; $($tail:tt)*) => (
        fn process($slf) -> Result<()> $body

        define_processor!(@tail $slf $($tail)*);
    );

    (@tail $slf:ident current_package => $body:block; $($tail:tt)*) => (
        fn current_package(&$slf) -> Option<&'env ::core::RpVersionedPackage> $body

        define_processor!(@tail $slf $($tail)*);
    );

    (@tail $slf:ident current_package => $expr:expr; $($tail:tt)*) => (
        fn current_package(&$slf) -> Option<&'env ::core::RpVersionedPackage> { Some($expr) }

        define_processor!(@tail $slf $($tail)*);
    );

    (@tail $slf:ident) => ();
}

#[macro_export]
macro_rules! html {
    (@open $slf:ident, $element:ident {$($key:ident => $value:expr),*}) => {{
        write!($slf.out(), "<{}", stringify!($element))?;
        $(
            write!($slf.out(), " {}=\"", stringify!($key))?;
            $slf.out().write_str(&$value.format_attribute())?;
            write!($slf.out(), "\"")?;
        )*
        write!($slf.out(), ">")?;
    }};

    (@close $slf:ident, $element:ident) => {{
        write!($slf.out(), "</{}>", stringify!($element))?;
    }};

    ($slf:ident, $element:ident {$($key:ident => $value:expr),*} => $body:block) => {{
        html!(@open $slf, $element {$($key=> $value),*});
        $slf.out().new_line()?;
        $slf.out().indent();
        $body;
        $slf.out().new_line_unless_empty()?;
        $slf.out().unindent();
        html!(@close $slf, $element);
        $slf.out().new_line()?;
    }};

    ($slf:ident, $element:ident {$($key:ident => $value:expr),*} ~ $body:expr) => {{
        html!(@open $slf, $element {$($key=> $value),*});
        write!($slf.out(), "{}", $body)?;
        html!(@close $slf, $element);
        $slf.out().new_line()?;
    }};

    ($slf:ident, $element:ident {$($key:ident => $value:expr),*}) => {
        html!($element {$($key=> $value),*}, $slf => {})
    };

    ($slf:ident, $element:ident $body:expr) => {
        html!($element {} $body)
    };
}