@codemirror/legacy-modes
Version:
Collection of ported legacy language modes for the CodeMirror code editor
260 lines (242 loc) • 8.4 kB
JavaScript
;
Object.defineProperty(exports, '__esModule', { value: true });
function simpleMode(states) {
ensureState(states, "start");
var states_ = {}, meta = states.languageData || {}, hasIndentation = false;
for (var state in states) if (state != meta && states.hasOwnProperty(state)) {
var list = states_[state] = [], orig = states[state];
for (var i = 0; i < orig.length; i++) {
var data = orig[i];
list.push(new Rule(data, states));
if (data.indent || data.dedent) hasIndentation = true;
}
}
return {
name: meta.name,
startState: function() {
return {state: "start", pending: null, indent: hasIndentation ? [] : null};
},
copyState: function(state) {
var s = {state: state.state, pending: state.pending, indent: state.indent && state.indent.slice(0)};
if (state.stack)
s.stack = state.stack.slice(0);
return s;
},
token: tokenFunction(states_),
indent: indentFunction(states_, meta),
mergeTokens: meta.mergeTokens,
languageData: meta
}
}
function ensureState(states, name) {
if (!states.hasOwnProperty(name))
throw new Error("Undefined state " + name + " in simple mode");
}
function toRegex(val, caret) {
if (!val) return /(?:)/;
var flags = "";
if (val instanceof RegExp) {
if (val.ignoreCase) flags = "i";
if (val.unicode) flags += "u";
val = val.source;
} else {
val = String(val);
}
return new RegExp((caret === false ? "" : "^") + "(?:" + val + ")", flags);
}
function asToken(val) {
if (!val) return null;
if (val.apply) return val
if (typeof val == "string") return val.replace(/\./g, " ");
var result = [];
for (var i = 0; i < val.length; i++)
result.push(val[i] && val[i].replace(/\./g, " "));
return result;
}
function Rule(data, states) {
if (data.next || data.push) ensureState(states, data.next || data.push);
this.regex = toRegex(data.regex);
this.token = asToken(data.token);
this.data = data;
}
function tokenFunction(states) {
return function(stream, state) {
if (state.pending) {
var pend = state.pending.shift();
if (state.pending.length == 0) state.pending = null;
stream.pos += pend.text.length;
return pend.token;
}
var curState = states[state.state];
for (var i = 0; i < curState.length; i++) {
var rule = curState[i];
var matches = (!rule.data.sol || stream.sol()) && stream.match(rule.regex);
if (matches) {
if (rule.data.next) {
state.state = rule.data.next;
} else if (rule.data.push) {
(state.stack || (state.stack = [])).push(state.state);
state.state = rule.data.push;
} else if (rule.data.pop && state.stack && state.stack.length) {
state.state = state.stack.pop();
}
if (rule.data.indent)
state.indent.push(stream.indentation() + stream.indentUnit);
if (rule.data.dedent)
state.indent.pop();
var token = rule.token;
if (token && token.apply) token = token(matches);
if (matches.length > 2 && rule.token && typeof rule.token != "string") {
state.pending = [];
for (var j = 2; j < matches.length; j++)
if (matches[j])
state.pending.push({text: matches[j], token: rule.token[j - 1]});
stream.backUp(matches[0].length - (matches[1] ? matches[1].length : 0));
return token[0];
} else if (token && token.join) {
return token[0];
} else {
return token;
}
}
}
stream.next();
return null;
};
}
function indentFunction(states, meta) {
return function(state, textAfter) {
if (state.indent == null || meta.dontIndentStates && meta.dontIndentStates.indexOf(state.state) > -1)
return null
var pos = state.indent.length - 1, rules = states[state.state];
scan: for (;;) {
for (var i = 0; i < rules.length; i++) {
var rule = rules[i];
if (rule.data.dedent && rule.data.dedentIfLineStart !== false) {
var m = rule.regex.exec(textAfter);
if (m && m[0]) {
pos--;
if (rule.next || rule.push) rules = states[rule.next || rule.push];
textAfter = textAfter.slice(m[0].length);
continue scan;
}
}
}
break;
}
return pos < 0 ? 0 : state.indent[pos];
};
}
var kKeywords = [
"align",
"block",
"br(_if|_table|_on_(cast|data|func|i31|null))?",
"call(_indirect|_ref)?",
"current_memory",
"\\bdata\\b",
"catch(_all)?",
"delegate",
"drop",
"elem",
"else",
"end",
"export",
"\\bextern\\b",
"\\bfunc\\b",
"global(\\.(get|set))?",
"if",
"import",
"local(\\.(get|set|tee))?",
"loop",
"module",
"mut",
"nop",
"offset",
"param",
"result",
"rethrow",
"return(_call(_indirect|_ref)?)?",
"select",
"start",
"table(\\.(size|get|set|size|grow|fill|init|copy))?",
"then",
"throw",
"try",
"type",
"unreachable",
"unwind",
// Numeric opcodes.
"i(32|64)\\.(store(8|16)|(load(8|16)_[su]))",
"i64\\.(load32_[su]|store32)",
"[fi](32|64)\\.(const|load|store)",
"f(32|64)\\.(abs|add|ceil|copysign|div|eq|floor|[gl][et]|max|min|mul|nearest|neg?|sqrt|sub|trunc)",
"i(32|64)\\.(a[dn]d|c[lt]z|(div|rem)_[su]|eqz?|[gl][te]_[su]|mul|ne|popcnt|rot[lr]|sh(l|r_[su])|sub|x?or)",
"i64\\.extend_[su]_i32",
"i32\\.wrap_i64",
"i(32|64)\\.trunc_f(32|64)_[su]",
"f(32|64)\\.convert_i(32|64)_[su]",
"f64\\.promote_f32",
"f32\\.demote_f64",
"f32\\.reinterpret_i32",
"i32\\.reinterpret_f32",
"f64\\.reinterpret_i64",
"i64\\.reinterpret_f64",
// Atomics.
"memory(\\.((atomic\\.(notify|wait(32|64)))|grow|size))?",
"i64\.atomic\\.(load32_u|store32|rmw32\\.(a[dn]d|sub|x?or|(cmp)?xchg)_u)",
"i(32|64)\\.atomic\\.(load((8|16)_u)?|store(8|16)?|rmw(\\.(a[dn]d|sub|x?or|(cmp)?xchg)|(8|16)\\.(a[dn]d|sub|x?or|(cmp)?xchg)_u))",
// SIMD.
"v128\\.load(8x8|16x4|32x2)_[su]",
"v128\\.load(8|16|32|64)_splat",
"v128\\.(load|store)(8|16|32|64)_lane",
"v128\\.load(32|64)_zero",
"v128\.(load|store|const|not|andnot|and|or|xor|bitselect|any_true)",
"i(8x16|16x8)\\.(extract_lane_[su]|(add|sub)_sat_[su]|avgr_u)",
"i(8x16|16x8|32x4|64x2)\\.(neg|add|sub|abs|shl|shr_[su]|all_true|bitmask|eq|ne|[lg][te]_s)",
"(i(8x16|16x8|32x4|64x2)|f(32x4|64x2))\.(splat|replace_lane)",
"i(8x16|16x8|32x4)\\.(([lg][te]_u)|((min|max)_[su]))",
"f(32x4|64x2)\\.(neg|add|sub|abs|nearest|eq|ne|[lg][te]|sqrt|mul|div|min|max|ceil|floor|trunc)",
"[fi](32x4|64x2)\\.extract_lane",
"i8x16\\.(shuffle|swizzle|popcnt|narrow_i16x8_[su])",
"i16x8\\.(narrow_i32x4_[su]|mul|extadd_pairwise_i8x16_[su]|q15mulr_sat_s)",
"i16x8\\.(extend|extmul)_(low|high)_i8x16_[su]",
"i32x4\\.(mul|dot_i16x8_s|trunc_sat_f64x2_[su]_zero)",
"i32x4\\.((extend|extmul)_(low|high)_i16x8_|trunc_sat_f32x4_|extadd_pairwise_i16x8_)[su]",
"i64x2\\.(mul|(extend|extmul)_(low|high)_i32x4_[su])",
"f32x4\\.(convert_i32x4_[su]|demote_f64x2_zero)",
"f64x2\\.(promote_low_f32x4|convert_low_i32x4_[su])",
// Reference types, function references, and GC.
"\\bany\\b",
"array\\.len",
"(array|struct)(\\.(new_(default_)?with_rtt|get(_[su])?|set))?",
"\\beq\\b",
"field",
"i31\\.(new|get_[su])",
"\\bnull\\b",
"ref(\\.(([ai]s_(data|func|i31))|cast|eq|func|(is_|as_non_)?null|test))?",
"rtt(\\.(canon|sub))?",
];
const wast = simpleMode({
start: [
{regex: new RegExp(kKeywords.join('|')), token: "keyword"},
{regex: /\b((any|data|eq|extern|i31|func)ref|[fi](32|64)|i(8|16))\b/, token: "atom"},
{regex: /\b(funcref|externref|[fi](32|64))\b/, token: "atom"},
{regex: /\$([a-zA-Z0-9_`\+\-\*\/\\\^~=<>!\?@#$%&|:\.]+)/, token: "variable"},
{regex: /"(?:[^"\\\x00-\x1f\x7f]|\\[nt\\'"]|\\[0-9a-fA-F][0-9a-fA-F])*"/, token: "string"},
{regex: /\(;.*?/, token: "comment", next: "comment"},
{regex: /;;.*$/, token: "comment"},
{regex: /\(/, indent: true},
{regex: /\)/, dedent: true},
],
comment: [
{regex: /.*?;\)/, token: "comment", next: "start"},
{regex: /.*/, token: "comment"},
],
languageData: {
name: "wast",
dontIndentStates: ['comment'],
},
});
// https://github.com/WebAssembly/design/issues/981 mentions text/webassembly,
// which seems like a reasonable choice, although it's not standard right now.
exports.wast = wast;