CocoRoboDesktop/kityminder-editor/src/tool/innertext.js

/**
 * @fileOverview
 *
 * innerText polyfill
 *
 * @author: techird
 * @copyright: Baidu FEX, 2014
 */


define(function(require, exports, module) {
    if ((!('innerText' in document.createElement('a'))) && ('getSelection' in window)) {
        HTMLElement.prototype.__defineGetter__('innerText', function() {
            var selection = window.getSelection(),
                ranges    = [],
                str, i;

            // Save existing selections.
            for (i = 0; i < selection.rangeCount; i++) {
                ranges[i] = selection.getRangeAt(i);
            }

            // Deselect everything.
            selection.removeAllRanges();

            // Select `el` and all child nodes.
            // 'this' is the element .innerText got called on
            selection.selectAllChildren(this);

            // Get the string representation of the selected nodes.
            str = selection.toString();

            // Deselect everything. Again.
            selection.removeAllRanges();

            // Restore all formerly existing selections.
            for (i = 0; i < ranges.length; i++) {
                selection.addRange(ranges[i]);
            }

            // Oh look, this is what we wanted.
            // String representation of the element, close to as rendered.
            return str;
        });
        HTMLElement.prototype.__defineSetter__('innerText', function(text) {
            /**
             * @Desc: 解决FireFox节点内容删除后text为null，出现报错的问题
             * @Editor: Naixor
             * @Date: 2015.9.16
             */
            this.innerHTML = (text || '').replace(/</g, '&lt;').replace(/>/g, '&gt;').replace(/\n/g, '<br>');
        });
    }
});