125 lines
4.1 KiB
JavaScript
125 lines
4.1 KiB
JavaScript
exports.htmlEscape = function(text) {
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var replacements = {"<": "<", ">": ">",
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"&": "&", "\"": """};
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return text.replace(/[<>&"]/g, function(character) {
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return replacements[character];
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});
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};
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exports.splitLines = function(string){return string.split(/\r?\n/);};
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// Counts the column offset in a string, taking tabs into account.
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// Used mostly to find indentation.
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function countColumn(string, end) {
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if (end == null) {
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end = string.search(/[^\s\u00a0]/);
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if (end == -1) end = string.length;
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}
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for (var i = 0, n = 0; i < end; ++i) {
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if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);
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else ++n;
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}
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return n;
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}
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function StringStream(string) {
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this.pos = this.start = 0;
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this.string = string;
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}
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StringStream.prototype = {
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eol: function() {return this.pos >= this.string.length;},
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sol: function() {return this.pos == 0;},
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peek: function() {return this.string.charAt(this.pos);},
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next: function() {
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if (this.pos < this.string.length)
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return this.string.charAt(this.pos++);
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},
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eat: function(match) {
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var ch = this.string.charAt(this.pos);
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if (typeof match == "string") var ok = ch == match;
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else var ok = ch && (match.test ? match.test(ch) : match(ch));
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if (ok) {++this.pos; return ch;}
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},
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eatWhile: function(match) {
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var start = this.pos;
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while (this.eat(match)){}
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return this.pos > start;
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},
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eatSpace: function() {
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var start = this.pos;
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while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
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return this.pos > start;
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},
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skipToEnd: function() {this.pos = this.string.length;},
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skipTo: function(ch) {
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var found = this.string.indexOf(ch, this.pos);
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if (found > -1) {this.pos = found; return true;}
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},
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backUp: function(n) {this.pos -= n;},
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column: function() {return countColumn(this.string, this.start);},
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indentation: function() {return countColumn(this.string);},
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match: function(pattern, consume, caseInsensitive) {
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if (typeof pattern == "string") {
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function cased(str) {return caseInsensitive ? str.toLowerCase() : str;}
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if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {
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if (consume !== false) this.pos += pattern.length;
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return true;
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}
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}
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else {
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var match = this.string.slice(this.pos).match(pattern);
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if (match && consume !== false) this.pos += match[0].length;
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return match;
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}
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},
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current: function(){return this.string.slice(this.start, this.pos);}
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};
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exports.StringStream = StringStream;
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exports.startState = function(mode, a1, a2) {
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return mode.startState ? mode.startState(a1, a2) : true;
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};
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var modes = {}, mimeModes = {};
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exports.defineMode = function(name, mode) { modes[name] = mode; };
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exports.defineMIME = function(mime, spec) { mimeModes[mime] = spec; };
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exports.getMode = function(options, spec) {
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if (typeof spec == "string" && mimeModes.hasOwnProperty(spec))
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spec = mimeModes[spec];
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if (typeof spec == "string")
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var mname = spec, config = {};
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else if (spec != null)
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var mname = spec.name, config = spec;
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var mfactory = modes[mname];
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if (!mfactory) throw new Error("Unknown mode: " + spec);
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return mfactory(options, config || {});
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};
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exports.runMode = function(string, modespec, callback) {
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var mode = exports.getMode({indentUnit: 2}, modespec);
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var isNode = callback.nodeType == 1;
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if (isNode) {
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var node = callback, accum = [];
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callback = function(string, style) {
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if (string == "\n")
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accum.push("<br>");
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else if (style)
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accum.push("<span class=\"cm-" + exports.htmlEscape(style) + "\">" + exports.htmlEscape(string) + "</span>");
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else
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accum.push(exports.htmlEscape(string));
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}
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}
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var lines = exports.splitLines(string), state = exports.startState(mode);
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for (var i = 0, e = lines.length; i < e; ++i) {
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if (i) callback("\n");
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var stream = new exports.StringStream(lines[i]);
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while (!stream.eol()) {
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var style = mode.token(stream, state);
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callback(stream.current(), style, i, stream.start);
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stream.start = stream.pos;
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}
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}
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if (isNode)
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node.innerHTML = accum.join("");
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};
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