笙默考试管理系统-MyExamTest----codemirror（40）
目录
CodeMirror.copyState = copyState;
function startState(mode, a1, a2) {
return mode.startState ? mode.startState(a1, a2) : true;
}
CodeMirror.startState = startState;
// The character stream used by a mode's parser.
function StringStream(string, tabSize) {
this.pos = this.start = 0;
this.string = string;
this.tabSize = tabSize || 8;
}
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, this.tabSize);},
indentation: function() {return countColumn(this.string, null, this.tabSize);},
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);}
};
CodeMirror.StringStream = StringStream;
function MarkedText(from, to, className, set) {
this.from = from; this.to = to; this.style = className; this.set = set;
}
MarkedText.prototype = {
attach: function(line) { this.set.push(line); },
detach: function(line) {
var ix = indexOf(this.set, line);
if (ix > -1) this.set.splice(ix, 1);
},
split: function(pos, lenBefore) {
if (this.to <= pos && this.to != null) return null;
var from = this.from < pos || this.from == null ? null : this.from - pos + lenBefore;
var to = this.to == null ? null : this.to - pos + lenBefore;
return new MarkedText(from, to, this.style, this.set);
},
dup: function() { return new MarkedText(null, null, this.style, this.set); },
clipTo: function(fromOpen, from, toOpen, to, diff) {
if (this.from != null && this.from >= from)
this.from = Math.max(to, this.from) + diff;
if (this.to != null && this.to > from)
this.to = to < this.to ? this.to + diff : from;
if (fromOpen && to > this.from && (to < this.to || this.to == null))
this.from = null;
if (toOpen && (from < this.to || this.to == null) && (from > this.from || this.from == null))
this.to = null;
},
isDead: function() { return this.from != null && this.to != null && this.from >= this.to; },
sameSet: function(x) { return this.set == x.set; }
};