rust/doc/lib/codemirror-node.js

126 lines
4.1 KiB
JavaScript

exports.htmlEscape = function(text) {
var replacements = {"<": "&lt;", ">": "&gt;",
"&": "&amp;", "\"": "&quot;"};
return text.replace(/[<>&"]/g, function(character) {
return replacements[character];
});
};
exports.splitLines = function(string){return string.split(/\r?\n/);};
// Counts the column offset in a string, taking tabs into account.
// Used mostly to find indentation.
function countColumn(string, end) {
tabSize = 4;
if (end == null) {
end = string.search(/[^\s\u00a0]/);
if (end == -1) end = string.length;
}
for (var i = 0, n = 0; i < end; ++i) {
if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);
else ++n;
}
return n;
}
function StringStream(string) {
this.pos = this.start = 0;
this.string = string;
}
StringStream.prototype = {
eol: function() {return this.pos >= this.string.length;},
sol: function() {return this.pos == 0;},
peek: function() {return this.string.charAt(this.pos);},
next: function() {
if (this.pos < this.string.length)
return this.string.charAt(this.pos++);
},
eat: function(match) {
var ch = this.string.charAt(this.pos);
if (typeof match == "string") var ok = ch == match;
else var ok = ch && (match.test ? match.test(ch) : match(ch));
if (ok) {++this.pos; return ch;}
},
eatWhile: function(match) {
var start = this.pos;
while (this.eat(match)){}
return this.pos > start;
},
eatSpace: function() {
var start = this.pos;
while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
return this.pos > start;
},
skipToEnd: function() {this.pos = this.string.length;},
skipTo: function(ch) {
var found = this.string.indexOf(ch, this.pos);
if (found > -1) {this.pos = found; return true;}
},
backUp: function(n) {this.pos -= n;},
column: function() {return countColumn(this.string, this.start);},
indentation: function() {return countColumn(this.string);},
match: function(pattern, consume, caseInsensitive) {
if (typeof pattern == "string") {
function cased(str) {return caseInsensitive ? str.toLowerCase() : str;}
if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {
if (consume !== false) this.pos += pattern.length;
return true;
}
}
else {
var match = this.string.slice(this.pos).match(pattern);
if (match && consume !== false) this.pos += match[0].length;
return match;
}
},
current: function(){return this.string.slice(this.start, this.pos);}
};
exports.StringStream = StringStream;
exports.startState = function(mode, a1, a2) {
return mode.startState ? mode.startState(a1, a2) : true;
};
var modes = {}, mimeModes = {};
exports.defineMode = function(name, mode) { modes[name] = mode; };
exports.defineMIME = function(mime, spec) { mimeModes[mime] = spec; };
exports.getMode = function(options, spec) {
if (typeof spec == "string" && mimeModes.hasOwnProperty(spec))
spec = mimeModes[spec];
if (typeof spec == "string")
var mname = spec, config = {};
else if (spec != null)
var mname = spec.name, config = spec;
var mfactory = modes[mname];
if (!mfactory) throw new Error("Unknown mode: " + spec);
return mfactory(options, config || {});
};
exports.runMode = function(string, modespec, callback) {
var mode = exports.getMode({indentUnit: 2}, modespec);
var isNode = callback.nodeType == 1;
if (isNode) {
var node = callback, accum = [];
callback = function(string, style) {
if (string == "\n")
accum.push("<br>");
else if (style)
accum.push("<span class=\"cm-" + exports.htmlEscape(style) + "\">" + exports.htmlEscape(string) + "</span>");
else
accum.push(exports.htmlEscape(string));
}
}
var lines = exports.splitLines(string), state = exports.startState(mode);
for (var i = 0, e = lines.length; i < e; ++i) {
if (i) callback("\n");
var stream = new exports.StringStream(lines[i]);
while (!stream.eol()) {
var style = mode.token(stream, state);
callback(stream.current(), style, i, stream.start);
stream.start = stream.pos;
}
}
if (isNode)
node.innerHTML = accum.join("");
};