笙默考试管理系统-MyExamTest----codemirror（14）

笙默考试管理系统-MyExamTest----codemirror（14）

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

 function fastPoll() {

            var missed = false;

            pollingFast = true;

            function p() {

                startOperation();

                var changed = readInput();

                if (!changed && !missed) {missed = true; poll.set(60, p);}

                else {pollingFast = false; slowPoll();}

                endOperation();

            }

• 笙默考试管理系统-MyExamTest----codemirror

            poll.set(20, p);

        }

        // Previnput is a hack to work with IME. If we reset the textarea

        // on every change, that breaks IME. So we look for changes

        // compared to the previous content instead. (Modern browsers have

        // events that indicate IME taking place, but these are not widely

        // supported or compatible enough yet to rely on.)

        var prevInput = "";

• 笙默考试管理系统-MyExamTest----codemirror

        function readInput() {

            if (leaveInputAlone || !focused || hasSelection(input)) return false;

            var text = input.value;

            if (text == prevInput) return false;

            shiftSelecting = null;

            var same = 0, l = Math.min(prevInput.length, text.length);

            while (same < l && prevInput[same] == text[same]) ++same;

            if (same < prevInput.length)

• 笙默考试管理系统-MyExamTest----codemirror

                sel.from = {line: sel.from.line, ch: sel.from.ch - (prevInput.length - same)};

            else if (overwrite && posEq(sel.from, sel.to))

                sel.to = {line: sel.to.line, ch: Math.min(getLine(sel.to.line).text.length, sel.to.ch + (text.length - same))};

            replaceSelection(text.slice(same), "end");

            prevInput = text;

            return true;

        }

• 笙默考试管理系统-MyExamTest----codemirror

        function resetInput(user) {

            if (!posEq(sel.from, sel.to)) {

                prevInput = "";

                input.value = getSelection();

                input.select();

            } else if (user) prevInput = input.value = "";

        }