笙默考试管理系统-MyExamTest----codemirror（24）

笙默考试管理系统-MyExamTest----codemirror（25）

目录

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

            var from = 0, fromX = 0, to = text.length, toX;
            // Guess a suitable upper bound for our search.
            var estimated = Math.min(to, Math.ceil((x + innerOff * scroller.clientWidth * .9) / cw));
            for (;;) {
                var estX = getX(estimated);
                if (estX <= x && estimated < to) estimated = Math.min(to, Math.ceil(estimated * 1.2));
                else {toX = estX; to = estimated; break;}
            }

• 笙默考试管理系统-MyExamTest----codemirror

            if (x > toX) return {line: lineNo, ch: to};
            // Try to guess a suitable lower bound as well.
            estimated = Math.floor(to * 0.8); estX = getX(estimated);
            if (estX < x) {from = estimated; fromX = estX;}
            // Do a binary search between these bounds.
            for (;;) {

• 笙默考试管理系统-MyExamTest----codemirror

                if (to - from <= 1) return {line: lineNo, ch: (toX - x > x - fromX) ? from : to};
                var middle = Math.ceil((from + to) / 2), middleX = getX(middle);
                if (middleX > x) {to = middle; toX = middleX;}
                else {from = middle; fromX = middleX;}
            }
        }
        function pageCoords(pos) {
            var local = localCoords(pos, true), off = eltOffset(lineSpace);
            return {x: off.left + local.x, y: off.top + local.y, yBot: off.top + local.yBot};
        }

• 笙默考试管理系统-MyExamTest----codemirror

 var cachedHeight, cachedHeightFor, measureText;
        function textHeight() {
            if (measureText == null) {
                measureText = "

";
                 for (var i = 0; i < 49; ++i) measureText += "x
";
                 measureText += "x

";
            }

• 笙默考试管理系统-MyExamTest----codemirror

            var offsetHeight = lineDiv.clientHeight;
            if (offsetHeight == cachedHeightFor) return cachedHeight;
            cachedHeightFor = offsetHeight;
            measure.innerHTML = measureText;
            cachedHeight = measure.firstChild.offsetHeight / 50 || 1;
            measure.innerHTML = "";
            return cachedHeight;