笙默考试管理系统-MyExamTest----codemirror（21）
目录
一、 笙默考试管理系统-MyExamTest
二、 笙默考试管理系统-MyExamTest
三、 笙默考试管理系统-MyExamTest
四、 笙默考试管理系统-MyExamTest
五、 笙默考试管理系统-MyExamTest
if (!posEq(to, sel.to)) {
if (to.line < oldTo)
changes.push({from: Math.max(oldFrom, from.line), to: oldTo + 1});
else
changes.push({from: Math.max(from.line, oldTo), to: to.line + 1});
}
}
sel.from = from; sel.to = to;
selectionChanged = true;
}
function skipHidden(pos, oldLine, oldCh) {
function getNonHidden(dir) {
var lNo = pos.line + dir, end = dir == 1 ? doc.size : -1;
while (lNo != end) {
var line = getLine(lNo);
if (!line.hidden) {
var ch = pos.ch;
if (ch > oldCh || ch > line.text.length) ch = line.text.length;
return {line: lNo, ch: ch};
}
lNo += dir;
}
}
var line = getLine(pos.line);
if (!line.hidden) return pos;
if (pos.line >= oldLine) return getNonHidden(1) || getNonHidden(-1);
else return getNonHidden(-1) || getNonHidden(1);
}
function setCursor(line, ch, user) {
var pos = clipPos({line: line, ch: ch || 0});
(user ? setSelectionUser : setSelection)(pos, pos);
}
function clipLine(n) {return Math.max(0, Math.min(n, doc.size-1));}
function clipPos(pos) {
if (pos.line < 0) return {line: 0, ch: 0};
if (pos.line >= doc.size) return {line: doc.size-1, ch: getLine(doc.size-1).text.length};
var ch = pos.ch, linelen = getLine(pos.line).text.length;
if (ch == null || ch > linelen) return {line: pos.line, ch: linelen};
else if (ch < 0) return {line: pos.line, ch: 0};
else return pos;
}
function findPosH(dir, unit) {
var end = sel.inverted ? sel.from : sel.to, line = end.line, ch = end.ch;
var lineObj = getLine(line);
function findNextLine() {
for (var l = line + dir, e = dir < 0 ? -1 : doc.size; l != e; l += dir) {
var lo = getLine(l);
if (!lo.hidden) { line = l; lineObj = lo; return true; }
}
}
function moveOnce(boundToLine) {
if (ch == (dir < 0 ? 0 : lineObj.text.length)) {
if (!boundToLine && findNextLine()) ch = dir < 0 ? lineObj.text.length : 0;
else return false;
} else ch += dir;
return true;
}
if (unit == "char") moveOnce();
else if (unit == "column") moveOnce(true);
else if (unit == "word") {
var sawWord = false;
for (;;) {
if (dir < 0) if (!moveOnce()) break;
if (isWordChar(lineObj.text.charAt(ch))) sawWord = true;
else if (sawWord) {if (dir < 0) {dir = 1; moveOnce();} break;}
if (dir > 0) if (!moveOnce()) break;
}
}
)
