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

#![crate_name = "mustache"]

#![crate_type = "dylib"]
#![crate_type = "rlib"]

#![allow(unused_attributes)]

extern crate rustc_serialize;
extern crate log;
#[cfg(test)]extern crate tempdir;

use std::cell::RefCell;
use std::collections::HashMap;
use std::fmt;
use std::fs::File;
use std::io::Read;
use std::str;
use std::path::{PathBuf, Path};

pub use self::Data::*;
pub use builder::{MapBuilder, VecBuilder};
pub use encoder::{Error, IoError, InvalidStr, Encoder, EncoderResult};
pub use template::Template;


pub mod builder;
pub mod encoder;

mod compiler;
mod parser;
mod template;

pub enum Data {
    OptVal(Option<Box<Data>>),
    StrVal(String),
    Bool(bool),
    VecVal(Vec<Data>),
    Map(HashMap<String, Data>),
    Fun(RefCell<Box<FnMut(String) -> String + Send>>),
}

impl<'a> PartialEq for Data {
    #[inline]
    fn eq(&self, other: &Data) -> bool {
        match (self, other) {
            (&OptVal(ref v0), &OptVal(ref v1)) => v0 == v1,
            (&StrVal(ref v0), &StrVal(ref v1)) => v0 == v1,
            (&Bool(ref v0), &Bool(ref v1)) => v0 == v1,
            (&VecVal(ref v0), &VecVal(ref v1)) => v0 == v1,
            (&Map(ref v0), &Map(ref v1)) => v0 == v1,
            (&Fun(_), &Fun(_)) => panic!("cannot compare closures"),
            (_, _) => false,
        }
    }
}

impl<'a> fmt::Debug for Data {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        match *self {
            OptVal(ref v) => write!(f, "OptVal({:?})", v),
            StrVal(ref v) => write!(f, "StrVal({})", v),
            Bool(v) => write!(f, "Bool({:?})", v),
            VecVal(ref v) => write!(f, "VecVal({:?})", v),
            Map(ref v) => write!(f, "Map({:?})", v),
            Fun(_) => write!(f, "Fun(...)"),
        }
    }
}

/// Represents the shared metadata needed to compile and render a mustache
/// template.
#[derive(Clone)]
pub struct Context {
    pub template_path: PathBuf,
    pub template_extension: String,
}

impl fmt::Debug for Context {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        write!(f, "Context {{ template_path: {:?}, template_extension: {} }}",
               &*self.template_path,
               self.template_extension)
    }
}

impl Context {
    /// Configures a mustache context the specified path to the templates.
    pub fn new(path: PathBuf) -> Context {
        Context {
            template_path: path,
            template_extension: "mustache".to_string(),
        }
    }

    /// Compiles a template from a string
    pub fn compile<IT: Iterator<Item=char>>(&self, reader: IT) -> Template {
        let compiler = compiler::Compiler::new(self.clone(), reader);
        let (tokens, partials) = compiler.compile();

        template::new(self.clone(), tokens, partials)
    }

    /// Compiles a template from a path.
    pub fn compile_path<U: AsRef<Path>>(&self, path: U) -> Result<Template, Error> {
        // FIXME(#6164): This should use the file decoding tools when they are
        // written. For now we'll just read the file and treat it as UTF-8file.
        let mut path = self.template_path.join(path.as_ref());
        path.set_extension(&self.template_extension);
        let mut s = vec![];
        let mut file = try!(File::open(&path));
        try!(file.read_to_end(&mut s));

        // TODO: maybe allow UTF-16 as well?
        let template = match str::from_utf8(&*s) {
            Ok(string) => string,
            _ => { return Result::Err(Error::InvalidStr); }
        };

        Ok(self.compile(template.chars()))
    }
}

/// Compiles a template from an `Iterator<char>`.
pub fn compile_iter<T: Iterator<Item=char>>(iter: T) -> Template {
    Context::new(PathBuf::from(".")).compile(iter)
}

/// Compiles a template from a path.
/// returns None if the file cannot be read OR the file is not UTF-8 encoded
pub fn compile_path<U: AsRef<Path>>(path: U) -> Result<Template, Error> {
    let path = path.as_ref();

    match path.file_name() {
        Some(filename) => {
            let template_dir = path.parent().unwrap_or(Path::new("."));
            // FIXME: Should work with OsStrings, this will not use provided extension if
            // the extension is not utf8 :(
            let extension = path.extension()
                                .and_then(|ext| ext.to_str())
                                .unwrap_or("mustache");

            let context = Context {
                template_path: template_dir.to_path_buf(),
                template_extension: extension.to_string()
            };
            context.compile_path(filename)
        }
        None => Result::Err(Error::NoFilename)
    }
}

/// Compiles a template from a string.
pub fn compile_str(template: &str) -> Template {
    compile_iter(template.chars())
}