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355 lines
13 KiB
JavaScript
355 lines
13 KiB
JavaScript
/*!
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* jQuery.selection - jQuery Plugin
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*
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* Copyright (c) 2010-2014 IWASAKI Koji (@madapaja).
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* http://blog.madapaja.net/
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* Under The MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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(function($, win, doc) {
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/**
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* get caret status of the selection of the element
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*
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* @param {Element} element target DOM element
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* @return {Object} return
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* @return {String} return.text selected text
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* @return {Number} return.start start position of the selection
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* @return {Number} return.end end position of the selection
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*/
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var _getCaretInfo = function(element){
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var res = {
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text: '',
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start: 0,
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end: 0
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};
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if (!element.value) {
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/* no value or empty string */
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return res;
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}
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try {
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if (win.getSelection) {
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/* except IE */
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res.start = element.selectionStart;
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res.end = element.selectionEnd;
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res.text = element.value.slice(res.start, res.end);
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} else if (doc.selection) {
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/* for IE */
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element.focus();
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var range = doc.selection.createRange(),
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range2 = doc.body.createTextRange();
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res.text = range.text;
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try {
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range2.moveToElementText(element);
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range2.setEndPoint('StartToStart', range);
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} catch (e) {
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range2 = element.createTextRange();
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range2.setEndPoint('StartToStart', range);
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}
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res.start = element.value.length - range2.text.length;
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res.end = res.start + range.text.length;
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}
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} catch (e) {
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/* give up */
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}
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return res;
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};
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/**
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* caret operation for the element
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* @type {Object}
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*/
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var _CaretOperation = {
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/**
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* get caret position
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*
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* @param {Element} element target element
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* @return {Object} return
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* @return {Number} return.start start position for the selection
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* @return {Number} return.end end position for the selection
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*/
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getPos: function(element) {
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var tmp = _getCaretInfo(element);
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return {start: tmp.start, end: tmp.end};
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},
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/**
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* set caret position
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*
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* @param {Element} element target element
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* @param {Object} toRange caret position
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* @param {Number} toRange.start start position for the selection
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* @param {Number} toRange.end end position for the selection
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* @param {String} caret caret mode: any of the following: "keep" | "start" | "end"
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*/
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setPos: function(element, toRange, caret) {
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caret = this._caretMode(caret);
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if (caret === 'start') {
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toRange.end = toRange.start;
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} else if (caret === 'end') {
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toRange.start = toRange.end;
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}
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element.focus();
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try {
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if (element.createTextRange) {
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var range = element.createTextRange();
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if (win.navigator.userAgent.toLowerCase().indexOf("msie") >= 0) {
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toRange.start = element.value.substr(0, toRange.start).replace(/\r/g, '').length;
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toRange.end = element.value.substr(0, toRange.end).replace(/\r/g, '').length;
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}
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range.collapse(true);
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range.moveStart('character', toRange.start);
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range.moveEnd('character', toRange.end - toRange.start);
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range.select();
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} else if (element.setSelectionRange) {
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element.setSelectionRange(toRange.start, toRange.end);
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}
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} catch (e) {
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/* give up */
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}
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},
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/**
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* get selected text
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*
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* @param {Element} element target element
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* @return {String} return selected text
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*/
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getText: function(element) {
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return _getCaretInfo(element).text;
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},
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/**
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* get caret mode
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*
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* @param {String} caret caret mode
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* @return {String} return any of the following: "keep" | "start" | "end"
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*/
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_caretMode: function(caret) {
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caret = caret || "keep";
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if (caret === false) {
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caret = 'end';
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}
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switch (caret) {
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case 'keep':
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case 'start':
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case 'end':
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break;
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default:
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caret = 'keep';
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}
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return caret;
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},
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/**
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* replace selected text
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*
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* @param {Element} element target element
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* @param {String} text replacement text
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* @param {String} caret caret mode: any of the following: "keep" | "start" | "end"
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*/
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replace: function(element, text, caret) {
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var tmp = _getCaretInfo(element),
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orig = element.value,
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pos = $(element).scrollTop(),
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range = {start: tmp.start, end: tmp.start + text.length};
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element.value = orig.substr(0, tmp.start) + text + orig.substr(tmp.end);
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$(element).scrollTop(pos);
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this.setPos(element, range, caret);
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},
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/**
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* insert before the selected text
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*
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* @param {Element} element target element
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* @param {String} text insertion text
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* @param {String} caret caret mode: any of the following: "keep" | "start" | "end"
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*/
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insertBefore: function(element, text, caret) {
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var tmp = _getCaretInfo(element),
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orig = element.value,
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pos = $(element).scrollTop(),
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range = {start: tmp.start + text.length, end: tmp.end + text.length};
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element.value = orig.substr(0, tmp.start) + text + orig.substr(tmp.start);
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$(element).scrollTop(pos);
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this.setPos(element, range, caret);
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},
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/**
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* insert after the selected text
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*
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* @param {Element} element target element
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* @param {String} text insertion text
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* @param {String} caret caret mode: any of the following: "keep" | "start" | "end"
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*/
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insertAfter: function(element, text, caret) {
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var tmp = _getCaretInfo(element),
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orig = element.value,
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pos = $(element).scrollTop(),
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range = {start: tmp.start, end: tmp.end};
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element.value = orig.substr(0, tmp.end) + text + orig.substr(tmp.end);
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$(element).scrollTop(pos);
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this.setPos(element, range, caret);
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}
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};
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/* add jQuery.selection */
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$.extend({
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/**
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* get selected text on the window
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*
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* @param {String} mode selection mode: any of the following: "text" | "html"
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* @return {String} return
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*/
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selection: function(mode) {
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var getText = ((mode || 'text').toLowerCase() === 'text');
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try {
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if (win.getSelection) {
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if (getText) {
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// get text
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return win.getSelection().toString();
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} else {
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// get html
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var sel = win.getSelection(), range;
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if (sel.getRangeAt) {
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range = sel.getRangeAt(0);
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} else {
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range = doc.createRange();
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range.setStart(sel.anchorNode, sel.anchorOffset);
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range.setEnd(sel.focusNode, sel.focusOffset);
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}
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return $('<div></div>').append(range.cloneContents()).html();
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}
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} else if (doc.selection) {
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if (getText) {
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// get text
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return doc.selection.createRange().text;
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} else {
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// get html
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return doc.selection.createRange().htmlText;
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}
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}
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} catch (e) {
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/* give up */
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}
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return '';
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}
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});
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/* add selection */
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$.fn.extend({
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selection: function(mode, opts) {
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opts = opts || {};
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switch (mode) {
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/**
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* selection('getPos')
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* get caret position
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*
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* @return {Object} return
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* @return {Number} return.start start position for the selection
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* @return {Number} return.end end position for the selection
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*/
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case 'getPos':
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return _CaretOperation.getPos(this[0]);
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/**
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* selection('setPos', opts)
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* set caret position
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*
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* @param {Number} opts.start start position for the selection
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* @param {Number} opts.end end position for the selection
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*/
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case 'setPos':
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return this.each(function() {
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_CaretOperation.setPos(this, opts);
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});
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/**
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* selection('replace', opts)
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* replace the selected text
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*
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* @param {String} opts.text replacement text
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* @param {String} opts.caret caret mode: any of the following: "keep" | "start" | "end"
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*/
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case 'replace':
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return this.each(function() {
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_CaretOperation.replace(this, opts.text, opts.caret);
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});
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/**
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* selection('insert', opts)
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* insert before/after the selected text
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*
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* @param {String} opts.text insertion text
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* @param {String} opts.caret caret mode: any of the following: "keep" | "start" | "end"
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* @param {String} opts.mode insertion mode: any of the following: "before" | "after"
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*/
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case 'insert':
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return this.each(function() {
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if (opts.mode === 'before') {
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_CaretOperation.insertBefore(this, opts.text, opts.caret);
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} else {
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_CaretOperation.insertAfter(this, opts.text, opts.caret);
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}
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});
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/**
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* selection('get')
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* get selected text
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*
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* @return {String} return
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*/
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case 'get':
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/* falls through */
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default:
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return _CaretOperation.getText(this[0]);
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}
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return this;
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}
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});
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})(jQuery, window, window.document);
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