mirror of
https://github.com/jashkenas/coffeescript.git
synced 2022-11-09 12:23:24 -05:00
383 lines
14 KiB
JavaScript
383 lines
14 KiB
JavaScript
(function() {
|
|
var BALANCED_PAIRS, EXPRESSION_CLOSE, EXPRESSION_END, EXPRESSION_START, IMPLICIT_BLOCK, IMPLICIT_CALL, IMPLICIT_END, IMPLICIT_FUNC, IMPLICIT_UNSPACED_CALL, INVERSES, LINEBREAKS, SINGLE_CLOSERS, SINGLE_LINERS, _i, _len, _ref, left, rite;
|
|
var __indexOf = Array.prototype.indexOf || function(item) {
|
|
for (var i = 0, l = this.length; i < l; i++) if (this[i] === item) return i;
|
|
return -1;
|
|
};
|
|
exports.Rewriter = (function() {
|
|
function Rewriter() {
|
|
return this;
|
|
};
|
|
return Rewriter;
|
|
})();
|
|
exports.Rewriter.prototype.rewrite = function(_arg) {
|
|
this.tokens = _arg;
|
|
this.adjustComments();
|
|
this.removeLeadingNewlines();
|
|
this.removeMidExpressionNewlines();
|
|
this.closeOpenCalls();
|
|
this.closeOpenIndexes();
|
|
this.addImplicitIndentation();
|
|
this.tagPostfixConditionals();
|
|
this.addImplicitBraces();
|
|
this.addImplicitParentheses();
|
|
this.ensureBalance(BALANCED_PAIRS);
|
|
this.rewriteClosingParens();
|
|
return this.tokens;
|
|
};
|
|
exports.Rewriter.prototype.scanTokens = function(block) {
|
|
var i, token, tokens;
|
|
tokens = this.tokens;
|
|
i = 0;
|
|
while (token = tokens[i]) {
|
|
(i += block.call(this, token, i, tokens));
|
|
}
|
|
return true;
|
|
};
|
|
exports.Rewriter.prototype.detectEnd = function(i, condition, action) {
|
|
var _ref, _ref2, levels, token, tokens;
|
|
tokens = this.tokens;
|
|
levels = 0;
|
|
while (token = tokens[i]) {
|
|
if (levels === 0 && condition.call(this, token, i)) {
|
|
return action.call(this, token, i);
|
|
}
|
|
if (!token || levels < 0) {
|
|
return action.call(this, token, i - 1);
|
|
}
|
|
if (_ref = token[0], __indexOf.call(EXPRESSION_START, _ref) >= 0) {
|
|
levels += 1;
|
|
} else if (_ref2 = token[0], __indexOf.call(EXPRESSION_END, _ref2) >= 0) {
|
|
levels -= 1;
|
|
}
|
|
i += 1;
|
|
}
|
|
return i - 1;
|
|
};
|
|
exports.Rewriter.prototype.adjustComments = function() {
|
|
return this.scanTokens(function(token, i, tokens) {
|
|
var _ref, after, before, post, prev;
|
|
if (token[0] !== 'HERECOMMENT') {
|
|
return 1;
|
|
}
|
|
before = tokens[i - 2];
|
|
prev = tokens[i - 1];
|
|
post = tokens[i + 1];
|
|
after = tokens[i + 2];
|
|
if (((after != null) ? after[0] : undefined) === 'INDENT') {
|
|
tokens.splice(i + 2, 1);
|
|
if (((before != null) ? before[0] : undefined) === 'OUTDENT' && ((post != null) ? post[0] : undefined) === 'TERMINATOR') {
|
|
tokens.splice(i - 2, 1);
|
|
} else {
|
|
tokens.splice(i, 0, after);
|
|
}
|
|
} else if (prev && !((_ref = prev[0]) === 'TERMINATOR' || _ref === 'INDENT' || _ref === 'OUTDENT')) {
|
|
if (((post != null) ? post[0] : undefined) === 'TERMINATOR' && ((after != null) ? after[0] : undefined) === 'OUTDENT') {
|
|
tokens.splice.apply(tokens, [i + 2, 0].concat(tokens.splice(i, 2)));
|
|
if (tokens[i + 2][0] !== 'TERMINATOR') {
|
|
tokens.splice(i + 2, 0, ['TERMINATOR', '\n', prev[2]]);
|
|
}
|
|
} else {
|
|
tokens.splice(i, 0, ['TERMINATOR', '\n', prev[2]]);
|
|
}
|
|
return 2;
|
|
}
|
|
return 1;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.removeLeadingNewlines = function() {
|
|
var _len, _ref, i, tag;
|
|
for (i = 0, _len = (_ref = this.tokens).length; i < _len; i++) {
|
|
tag = _ref[i][0];
|
|
if (tag !== 'TERMINATOR') {
|
|
break;
|
|
}
|
|
}
|
|
return i ? this.tokens.splice(0, i) : undefined;
|
|
};
|
|
exports.Rewriter.prototype.removeMidExpressionNewlines = function() {
|
|
return this.scanTokens(function(token, i, tokens) {
|
|
var _ref;
|
|
if (!(token[0] === 'TERMINATOR' && (_ref = this.tag(i + 1), __indexOf.call(EXPRESSION_CLOSE, _ref) >= 0))) {
|
|
return 1;
|
|
}
|
|
tokens.splice(i, 1);
|
|
return 0;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.closeOpenCalls = function() {
|
|
var action, condition;
|
|
condition = function(token, i) {
|
|
var _ref;
|
|
return ((_ref = token[0]) === ')' || _ref === 'CALL_END') || token[0] === 'OUTDENT' && this.tag(i - 1) === ')';
|
|
};
|
|
action = function(token, i) {
|
|
return (this.tokens[token[0] === 'OUTDENT' ? i - 1 : i][0] = 'CALL_END');
|
|
};
|
|
return this.scanTokens(function(token, i) {
|
|
if (token[0] === 'CALL_START') {
|
|
this.detectEnd(i + 1, condition, action);
|
|
}
|
|
return 1;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.closeOpenIndexes = function() {
|
|
var action, condition;
|
|
condition = function(token, i) {
|
|
var _ref;
|
|
return ((_ref = token[0]) === ']' || _ref === 'INDEX_END');
|
|
};
|
|
action = function(token, i) {
|
|
return (token[0] = 'INDEX_END');
|
|
};
|
|
return this.scanTokens(function(token, i) {
|
|
if (token[0] === 'INDEX_START') {
|
|
this.detectEnd(i + 1, condition, action);
|
|
}
|
|
return 1;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.addImplicitBraces = function() {
|
|
var action, condition, stack;
|
|
stack = [];
|
|
condition = function(token, i) {
|
|
var _ref, _ref2, one, tag, three, two;
|
|
if (('HERECOMMENT' === this.tag(i + 1) || 'HERECOMMENT' === this.tag(i - 1))) {
|
|
return false;
|
|
}
|
|
_ref = this.tokens.slice(i + 1, i + 4), one = _ref[0], two = _ref[1], three = _ref[2];
|
|
tag = token[0];
|
|
return (tag === 'TERMINATOR' || tag === 'OUTDENT') && !(((two != null) ? two[0] : undefined) === ':' || ((one != null) ? one[0] : undefined) === '@' && ((three != null) ? three[0] : undefined) === ':') || tag === ',' && !((_ref2 = ((one != null) ? one[0] : undefined)) === 'IDENTIFIER' || _ref2 === 'NUMBER' || _ref2 === 'STRING' || _ref2 === '@' || _ref2 === 'TERMINATOR' || _ref2 === 'OUTDENT');
|
|
};
|
|
action = function(token, i) {
|
|
return this.tokens.splice(i, 0, ['}', '}', token[2]]);
|
|
};
|
|
return this.scanTokens(function(token, i, tokens) {
|
|
var _ref, idx, tag, tok;
|
|
if (_ref = (tag = token[0]), __indexOf.call(EXPRESSION_START, _ref) >= 0) {
|
|
stack.push(tag === 'INDENT' && this.tag(i - 1) === '{' ? '{' : tag);
|
|
return 1;
|
|
}
|
|
if (__indexOf.call(EXPRESSION_END, tag) >= 0) {
|
|
stack.pop();
|
|
return 1;
|
|
}
|
|
if (!(tag === ':' && stack[stack.length - 1] !== '{')) {
|
|
return 1;
|
|
}
|
|
stack.push('{');
|
|
idx = this.tag(i - 2) === '@' ? i - 2 : i - 1;
|
|
if (this.tag(idx - 2) === 'HERECOMMENT') {
|
|
idx -= 2;
|
|
}
|
|
tok = ['{', '{', token[2]];
|
|
tok.generated = true;
|
|
tokens.splice(idx, 0, tok);
|
|
this.detectEnd(i + 2, condition, action);
|
|
return 2;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.addImplicitParentheses = function() {
|
|
var action, classLine;
|
|
classLine = false;
|
|
action = function(token, i) {
|
|
var idx;
|
|
idx = token[0] === 'OUTDENT' ? i + 1 : i;
|
|
return this.tokens.splice(idx, 0, ['CALL_END', ')', token[2]]);
|
|
};
|
|
return this.scanTokens(function(token, i, tokens) {
|
|
var _ref, _ref2, callObject, next, prev, seenSingle, tag;
|
|
tag = token[0];
|
|
if (tag === 'CLASS') {
|
|
classLine = true;
|
|
}
|
|
prev = tokens[i - 1];
|
|
next = tokens[i + 1];
|
|
callObject = !classLine && tag === 'INDENT' && next && next.generated && next[0] === '{' && prev && (_ref = prev[0], __indexOf.call(IMPLICIT_FUNC, _ref) >= 0);
|
|
seenSingle = false;
|
|
if (__indexOf.call(LINEBREAKS, tag) >= 0) {
|
|
classLine = false;
|
|
}
|
|
if (prev && !prev.spaced && tag === '?') {
|
|
token.call = true;
|
|
}
|
|
if (!(callObject || ((prev != null) ? prev.spaced : undefined) && (prev.call || (_ref2 = prev[0], __indexOf.call(IMPLICIT_FUNC, _ref2) >= 0)) && ((__indexOf.call(IMPLICIT_CALL, tag) >= 0) || !token.spaced && (__indexOf.call(IMPLICIT_UNSPACED_CALL, tag) >= 0)))) {
|
|
return 1;
|
|
}
|
|
tokens.splice(i, 0, ['CALL_START', '(', token[2]]);
|
|
this.detectEnd(i + (callObject ? 2 : 1), function(token, i) {
|
|
var _ref3, post;
|
|
if (!seenSingle && token.fromThen) {
|
|
return true;
|
|
}
|
|
tag = token[0];
|
|
if ((tag === 'IF' || tag === 'ELSE' || tag === 'UNLESS' || tag === '->' || tag === '=>')) {
|
|
seenSingle = true;
|
|
}
|
|
if (tag === 'PROPERTY_ACCESS' && this.tag(i - 1) === 'OUTDENT') {
|
|
return true;
|
|
}
|
|
return !token.generated && this.tag(i - 1) !== ',' && (__indexOf.call(IMPLICIT_END, tag) >= 0) && (tag !== 'INDENT' || (this.tag(i - 2) !== 'CLASS' && !(_ref3 = this.tag(i - 1), __indexOf.call(IMPLICIT_BLOCK, _ref3) >= 0) && !((post = this.tokens[i + 1]) && post.generated && post[0] === '{')));
|
|
}, action);
|
|
if (prev[0] === '?') {
|
|
prev[0] = 'FUNC_EXIST';
|
|
}
|
|
return 2;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.addImplicitIndentation = function() {
|
|
return this.scanTokens(function(token, i, tokens) {
|
|
var _ref, _ref2, action, condition, indent, outdent, starter, tag;
|
|
tag = token[0];
|
|
if (tag === 'ELSE' && this.tag(i - 1) !== 'OUTDENT') {
|
|
tokens.splice.apply(tokens, [i, 0].concat(this.indentation(token)));
|
|
return 2;
|
|
}
|
|
if (tag === 'CATCH' && ((_ref = this.tag(i + 2)) === 'TERMINATOR' || _ref === 'FINALLY')) {
|
|
tokens.splice.apply(tokens, [i + 2, 0].concat(this.indentation(token)));
|
|
return 4;
|
|
}
|
|
if ((__indexOf.call(SINGLE_LINERS, tag) >= 0) && this.tag(i + 1) !== 'INDENT' && !(tag === 'ELSE' && this.tag(i + 1) === 'IF')) {
|
|
starter = tag;
|
|
_ref2 = this.indentation(token), indent = _ref2[0], outdent = _ref2[1];
|
|
if (starter === 'THEN') {
|
|
indent.fromThen = true;
|
|
}
|
|
indent.generated = (outdent.generated = true);
|
|
tokens.splice(i + 1, 0, indent);
|
|
condition = function(token, i) {
|
|
var _ref3;
|
|
return token[1] !== ';' && (_ref3 = token[0], __indexOf.call(SINGLE_CLOSERS, _ref3) >= 0) && !(token[0] === 'ELSE' && !(starter === 'IF' || starter === 'THEN'));
|
|
};
|
|
action = function(token, i) {
|
|
return this.tokens.splice(this.tag(i - 1) === ',' ? i - 1 : i, 0, outdent);
|
|
};
|
|
this.detectEnd(i + 2, condition, action);
|
|
if (tag === 'THEN') {
|
|
tokens.splice(i, 1);
|
|
}
|
|
return 1;
|
|
}
|
|
return 1;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.tagPostfixConditionals = function() {
|
|
var condition;
|
|
condition = function(token, i) {
|
|
var _ref;
|
|
return ((_ref = token[0]) === 'TERMINATOR' || _ref === 'INDENT');
|
|
};
|
|
return this.scanTokens(function(token, i) {
|
|
var _ref, original;
|
|
if (!((_ref = token[0]) === 'IF' || _ref === 'UNLESS')) {
|
|
return 1;
|
|
}
|
|
original = token;
|
|
this.detectEnd(i + 1, condition, function(token, i) {
|
|
return token[0] !== 'INDENT' ? (original[0] = 'POST_' + original[0]) : undefined;
|
|
});
|
|
return 1;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.ensureBalance = function(pairs) {
|
|
var _result, key, levels, open, openLine, unclosed, value;
|
|
levels = {};
|
|
openLine = {};
|
|
this.scanTokens(function(token, i) {
|
|
var _i, _len, _ref, _ref2, close, open, tag;
|
|
tag = token[0];
|
|
for (_i = 0, _len = (_ref = pairs).length; _i < _len; _i++) {
|
|
_ref2 = _ref[_i], open = _ref2[0], close = _ref2[1];
|
|
levels[open] |= 0;
|
|
if (tag === open) {
|
|
if (levels[open] === 0) {
|
|
openLine[open] = token[2];
|
|
}
|
|
levels[open] += 1;
|
|
} else if (tag === close) {
|
|
levels[open] -= 1;
|
|
}
|
|
if (levels[open] < 0) {
|
|
throw Error("too many " + (token[1]) + " on line " + (token[2] + 1));
|
|
}
|
|
}
|
|
return 1;
|
|
});
|
|
unclosed = (function() {
|
|
_result = [];
|
|
for (key in levels) {
|
|
value = levels[key];
|
|
if (value > 0) {
|
|
_result.push(key);
|
|
}
|
|
}
|
|
return _result;
|
|
})();
|
|
if (unclosed.length) {
|
|
throw Error("unclosed " + (open = unclosed[0]) + " on line " + (openLine[open] + 1));
|
|
}
|
|
};
|
|
exports.Rewriter.prototype.rewriteClosingParens = function() {
|
|
var debt, key, stack;
|
|
stack = [];
|
|
debt = {};
|
|
for (key in INVERSES) {
|
|
(debt[key] = 0);
|
|
}
|
|
return this.scanTokens(function(token, i, tokens) {
|
|
var _ref, inv, match, mtag, oppos, tag, val;
|
|
if (_ref = (tag = token[0]), __indexOf.call(EXPRESSION_START, _ref) >= 0) {
|
|
stack.push(token);
|
|
return 1;
|
|
}
|
|
if (!(__indexOf.call(EXPRESSION_END, tag) >= 0)) {
|
|
return 1;
|
|
}
|
|
if (debt[(inv = INVERSES[tag])] > 0) {
|
|
debt[inv] -= 1;
|
|
tokens.splice(i, 1);
|
|
return 0;
|
|
}
|
|
match = stack.pop();
|
|
mtag = match[0];
|
|
oppos = INVERSES[mtag];
|
|
if (tag === oppos) {
|
|
return 1;
|
|
}
|
|
debt[mtag] += 1;
|
|
val = [oppos, mtag === 'INDENT' ? match[1] : oppos];
|
|
if (this.tag(i + 2) === mtag) {
|
|
tokens.splice(i + 3, 0, val);
|
|
stack.push(match);
|
|
} else {
|
|
tokens.splice(i, 0, val);
|
|
}
|
|
return 1;
|
|
});
|
|
};
|
|
exports.Rewriter.prototype.indentation = function(token) {
|
|
return [['INDENT', 2, token[2]], ['OUTDENT', 2, token[2]]];
|
|
};
|
|
exports.Rewriter.prototype.tag = function(i) {
|
|
var _ref;
|
|
return (((_ref = this.tokens[i]) != null) ? _ref[0] : undefined);
|
|
};
|
|
BALANCED_PAIRS = [['(', ')'], ['[', ']'], ['{', '}'], ['INDENT', 'OUTDENT'], ['CALL_START', 'CALL_END'], ['PARAM_START', 'PARAM_END'], ['INDEX_START', 'INDEX_END']];
|
|
INVERSES = {};
|
|
EXPRESSION_START = [];
|
|
EXPRESSION_END = [];
|
|
for (_i = 0, _len = BALANCED_PAIRS.length; _i < _len; _i++) {
|
|
_ref = BALANCED_PAIRS[_i], left = _ref[0], rite = _ref[1];
|
|
EXPRESSION_START.push(INVERSES[rite] = left);
|
|
EXPRESSION_END.push(INVERSES[left] = rite);
|
|
}
|
|
EXPRESSION_CLOSE = ['CATCH', 'WHEN', 'ELSE', 'FINALLY'].concat(EXPRESSION_END);
|
|
IMPLICIT_FUNC = ['IDENTIFIER', 'SUPER', ')', 'CALL_END', ']', 'INDEX_END', '@', 'THIS'];
|
|
IMPLICIT_CALL = ['IDENTIFIER', 'NUMBER', 'STRING', 'JS', 'REGEX', 'NEW', 'PARAM_START', 'CLASS', 'IF', 'UNLESS', 'TRY', 'SWITCH', 'THIS', 'BOOL', 'UNARY', '@', '->', '=>', '[', '(', '{', '--', '++'];
|
|
IMPLICIT_UNSPACED_CALL = ['+', '-'];
|
|
IMPLICIT_BLOCK = ['->', '=>', '{', '[', ','];
|
|
IMPLICIT_END = ['POST_IF', 'POST_UNLESS', 'FOR', 'WHILE', 'UNTIL', 'LOOP', 'TERMINATOR', 'INDENT'];
|
|
SINGLE_LINERS = ['ELSE', '->', '=>', 'TRY', 'FINALLY', 'THEN'];
|
|
SINGLE_CLOSERS = ['TERMINATOR', 'CATCH', 'FINALLY', 'ELSE', 'OUTDENT', 'LEADING_WHEN'];
|
|
LINEBREAKS = ['TERMINATOR', 'INDENT', 'OUTDENT'];
|
|
}).call(this);
|