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
|
'use strict';
var use = require('use');
var define = require('define-property');
var debug = require('debug')('snapdragon:compiler');
var utils = require('./utils');
/**
* Create a new `Compiler` with the given `options`.
* @param {Object} `options`
*/
function Compiler(options, state) {
debug('initializing', __filename);
this.options = utils.extend({source: 'string'}, options);
this.state = state || {};
this.compilers = {};
this.output = '';
this.set('eos', function(node) {
return this.emit(node.val, node);
});
this.set('noop', function(node) {
return this.emit(node.val, node);
});
this.set('bos', function(node) {
return this.emit(node.val, node);
});
use(this);
}
/**
* Prototype methods
*/
Compiler.prototype = {
/**
* Throw an error message with details including the cursor position.
* @param {String} `msg` Message to use in the Error.
*/
error: function(msg, node) {
var pos = node.position || {start: {column: 0}};
var message = this.options.source + ' column:' + pos.start.column + ': ' + msg;
var err = new Error(message);
err.reason = msg;
err.column = pos.start.column;
err.source = this.pattern;
if (this.options.silent) {
this.errors.push(err);
} else {
throw err;
}
},
/**
* Define a non-enumberable property on the `Compiler` instance.
*
* ```js
* compiler.define('foo', 'bar');
* ```
* @name .define
* @param {String} `key` propery name
* @param {any} `val` property value
* @return {Object} Returns the Compiler instance for chaining.
* @api public
*/
define: function(key, val) {
define(this, key, val);
return this;
},
/**
* Emit `node.val`
*/
emit: function(str, node) {
this.output += str;
return str;
},
/**
* Add a compiler `fn` with the given `name`
*/
set: function(name, fn) {
this.compilers[name] = fn;
return this;
},
/**
* Get compiler `name`.
*/
get: function(name) {
return this.compilers[name];
},
/**
* Get the previous AST node.
*/
prev: function(n) {
return this.ast.nodes[this.idx - (n || 1)] || { type: 'bos', val: '' };
},
/**
* Get the next AST node.
*/
next: function(n) {
return this.ast.nodes[this.idx + (n || 1)] || { type: 'eos', val: '' };
},
/**
* Visit `node`.
*/
visit: function(node, nodes, i) {
var fn = this.compilers[node.type];
this.idx = i;
if (typeof fn !== 'function') {
throw this.error('compiler "' + node.type + '" is not registered', node);
}
return fn.call(this, node, nodes, i);
},
/**
* Map visit over array of `nodes`.
*/
mapVisit: function(nodes) {
if (!Array.isArray(nodes)) {
throw new TypeError('expected an array');
}
var len = nodes.length;
var idx = -1;
while (++idx < len) {
this.visit(nodes[idx], nodes, idx);
}
return this;
},
/**
* Compile `ast`.
*/
compile: function(ast, options) {
var opts = utils.extend({}, this.options, options);
this.ast = ast;
this.parsingErrors = this.ast.errors;
this.output = '';
// source map support
if (opts.sourcemap) {
var sourcemaps = require('./source-maps');
sourcemaps(this);
this.mapVisit(this.ast.nodes);
this.applySourceMaps();
this.map = opts.sourcemap === 'generator' ? this.map : this.map.toJSON();
return this;
}
this.mapVisit(this.ast.nodes);
return this;
}
};
/**
* Expose `Compiler`
*/
module.exports = Compiler;
|
