@atlassian/aui/lib/js/jquery/jquery.selection.js

Atlassian User Interface Framework

(function (global, factory) {
    if (typeof define === "function" && define.amd) {
        define([], factory);
    } else if (typeof exports !== "undefined") {
        factory();
    } else {
        var mod = {
            exports: {}
        };
        factory();
        global.jquerySelection = mod.exports;
    }
})(this, function () {
    'use strict';

    (function ($) {
        if (document.selection) {
            var fixCaretReturn = function fixCaretReturn(S) {
                return S.replace(/\u000D/g, '');
            };
            $.fn.selection = function (value) {
                var element = this[0];
                this.focus();
                if (!element) {
                    return false;
                }
                if (value == null) {
                    return document.selection.createRange().text;
                } else {
                    var scroll_top = element.scrollTop;
                    var range = document.selection.createRange();
                    range.text = value;
                    range.select();
                    element.focus();
                    element.scrollTop = scroll_top;
                }
            };
            $.fn.selectionRange = function (start, end) {
                var element = this[0];
                this.focus();
                var range = document.selection.createRange();

                if (start == null) {
                    var textAreaVal = this.val();
                    var len = textAreaVal.length;
                    var dup = range.duplicate();
                    dup.moveToElementText(element);

                    dup.setEndPoint('StartToEnd', range); // move the start of dup to end of range
                    var tEnd = len - fixCaretReturn(dup.text).length;
                    dup.setEndPoint('StartToStart', range); // move to start of dup to start of range
                    var tStart = len - fixCaretReturn(dup.text).length;

                    // IE swallows the newline at the end of the selection
                    if (tEnd != tStart && textAreaVal.charAt(tEnd + 1) == '\n') {
                        tEnd += 1;
                    }
                    return {
                        end: tEnd,
                        start: tStart,
                        text: textAreaVal.substring(tStart, tEnd),
                        textBefore: textAreaVal.substring(0, tStart),
                        textAfter: textAreaVal.substring(tEnd)
                    };
                } else {
                    // first reset range to beginning of text area
                    range.moveToElementText(element);
                    range.collapse(true);

                    range.moveStart('character', start);
                    range.moveEnd('character', end - start);
                    range.select();
                }
            };
        } else {
            $.fn.selection = function (value) {
                var element = this[0];
                if (!element) {
                    return false;
                }
                if (value == null) {
                    if (element.setSelectionRange) {
                        return element.value.substring(element.selectionStart, element.selectionEnd);
                    } else {
                        return false;
                    }
                } else {
                    var scroll_top = element.scrollTop;
                    if (!!element.setSelectionRange) {
                        var selection_start = element.selectionStart;
                        element.value = element.value.substring(0, selection_start) + value + element.value.substring(element.selectionEnd);
                        element.selectionStart = selection_start;
                        element.selectionEnd = selection_start + value.length;
                    }
                    element.focus();
                    element.scrollTop = scroll_top;
                }
            };
            $.fn.selectionRange = function (start, end) {
                if (start == null) {
                    var res = {
                        start: this[0].selectionStart,
                        end: this[0].selectionEnd
                    };
                    var elementValue = this.val();
                    res.text = elementValue.substring(res.start, res.end);
                    res.textBefore = elementValue.substring(0, res.start);
                    res.textAfter = elementValue.substring(res.end);
                    return res;
                } else {
                    this[0].selectionStart = start;
                    this[0].selectionEnd = end;
                }
            };
        }
        $.fn.wrapSelection = function (before, after) {
            this.selection(before + this.selection() + (after || ''));
        };
    })(jQuery);
});
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