笙默考试管理系统-MyExamTest----codemirror（53）

目录

笙默考试管理系统-MyExamTest----codemirror（51）

一、 笙默考试管理系统-MyExamTest----codemirror

二、 笙默考试管理系统-MyExamTest----codemirror

三、 笙默考试管理系统-MyExamTest----codemirror

四、 笙默考试管理系统-MyExamTest----codemirror

五、 笙默考试管理系统-MyExamTest----codemirror

• 笙默考试管理系统-MyExamTest----codemirror

function lineNo(line) {

        if (line.parent == null) return null;

        var cur = line.parent, no = indexOf(cur.lines, line);

        for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {

            for (var i = 0, e = chunk.children.length; ; ++i) {

                if (chunk.children[i] == cur) break;

                no += chunk.children[i].chunkSize();

            }

        }

        return no;

}

• 笙默考试管理系统-MyExamTest----codemirror

    function lineAtHeight(chunk, h) {

        var n = 0;

        outer: do {

            for (var i = 0, e = chunk.children.length; i < e; ++i) {

                var child = chunk.children[i], ch = child.height;

                if (h < ch) { chunk = child; continue outer; }

                h -= ch;

                n += child.chunkSize();

            }

            return n;

        } while (!chunk.lines);

        for (var i = 0, e = chunk.lines.length; i < e; ++i) {

            var line = chunk.lines[i], lh = line.height;

            if (h < lh) break;

            h -= lh;

        }

• 笙默考试管理系统-MyExamTest----codemirror

        return n + i;

    }

    function heightAtLine(chunk, n) {

        var h = 0;

        outer: do {

            for (var i = 0, e = chunk.children.length; i < e; ++i) {

                var child = chunk.children[i], sz = child.chunkSize();

                if (n < sz) { chunk = child; continue outer; }

                n -= sz;

                h += child.height;

            }

• 笙默考试管理系统-MyExamTest----codemirror

            return h;

        } while (!chunk.lines);

        for (var i = 0; i < n; ++i) h += chunk.lines[i].height;

        return h;

    }

• 笙默考试管理系统-MyExamTest----codemirror

    // The history object 'chunks' changes that are made close together

    // and at almost the same time into bigger undoable units.

    function History() {

        this.time = 0;

        this.done = []; this.undone = [];

    }