<!DOCTYPE html>
<html>
<head>
<script data-require="angularjs@1.3.6" data-semver="1.3.6" src="//cdnjs.cloudflare.com/ajax/libs/angular.js/1.3.6/angular.min.js"></script>
<link rel="stylesheet" href="style.css" />
<script type="text/javascript" src="behave.js"></script>
<script type="text/javascript" src="script.js"></script>
</head>
<body>
<h1>Autosize and auto line Numbers example</h1>
<div class="container">
<div class="line-nums"><span>1</span></div>
<textarea id="demo"></textarea>
</div>
</body>
</html>
window.onload = function(){
/*
* This hook adds autosizing functionality
* to your textarea
*/
BehaveHooks.add(['keydown'], function(data){
var numLines = data.lines.total,
fontSize = parseInt( getComputedStyle(data.editor.element)['font-size'] ),
padding = parseInt( getComputedStyle(data.editor.element)['padding'] );
data.editor.element.style.height = (((numLines*fontSize)+padding))+'px';
});
/*
* This hook adds Line Number Functionality
*/
BehaveHooks.add(['keydown'], function(data){
var numLines = data.lines.total,
house = document.getElementsByClassName('line-nums')[0],
html = '',
i;
for(i=0; i<numLines; i++){
html += '<div>'+(i+1)+'</div>';
}
house.innerHTML = html;
});
var editor = new Behave({
textarea: document.getElementById('demo'),
replaceTab: true,
softTabs: true,
tabSize: 4,
autoOpen: true,
overwrite: true,
autoStrip: true,
autoIndent: true
});
};
/* Styles go here */
body{
text-align:center;
padding:50px;
}
textarea{
width:400px;
/* The following three rules make a difference in the script */
overflow:hidden;
line-height: 13px;
font-size: 13px;
border:1px solid #999;
padding:10px;
font-family: monospace;
margin:0;
display:block;
outline:none;
}
/* textarea:focus{
border-color:#333;
} */
.container{
position:relative;
display:inline-block;
}
.line-nums{
font-size:13px;
line-height:13px;
padding:10px 4px;
font-family: monospace;
background: #EEE;
position: absolute;
width: 20px;
left: -28px;
bottom: 0;
top: 0;
text-align:right;
border:1px solid #999;
}
This is an example of behave.js which a lightweight library for adding IDE style behaviour to plain textarea.
All credit goes to: http://jakiestfu.github.io/Behave.js/
MIT Licensing
-----------------------------------------------------------------
Copyright (c) 2013 Jacob Kelley
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute,
sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial
portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
(function(undefined){
'use strict';
var BehaveHooks = BehaveHooks || (function(){
var hooks = {};
return {
add: function(hookName, fn){
if(typeof hookName == "object"){
var i;
for(i=0; i<hookName.length; i++){
var theHook = hookName[i];
if(!hooks[theHook]){
hooks[theHook] = [];
}
hooks[theHook].push(fn);
}
} else {
if(!hooks[hookName]){
hooks[hookName] = [];
}
hooks[hookName].push(fn);
}
},
get: function(hookName){
if(hooks[hookName]){
return hooks[hookName];
}
}
};
})(),
Behave = Behave || function (userOpts) {
if (typeof String.prototype.repeat !== 'function') {
String.prototype.repeat = function(times) {
if(times < 1){
return '';
}
if(times % 2){
return this.repeat(times - 1) + this;
}
var half = this.repeat(times / 2);
return half + half;
};
}
if (typeof Array.prototype.filter !== 'function') {
Array.prototype.filter = function(func /*, thisp */) {
if (this === null) {
throw new TypeError();
}
var t = Object(this),
len = t.length >>> 0;
if (typeof func != "function"){
throw new TypeError();
}
var res = [],
thisp = arguments[1];
for (var i = 0; i < len; i++) {
if (i in t) {
var val = t[i];
if (func.call(thisp, val, i, t)) {
res.push(val);
}
}
}
return res;
};
}
var defaults = {
textarea: null,
replaceTab: true,
softTabs: true,
tabSize: 4,
autoOpen: true,
overwrite: true,
autoStrip: true,
autoIndent: true,
fence: false
},
tab,
newLine,
charSettings = {
keyMap: [
{ open: "\"", close: "\"", canBreak: false },
{ open: "'", close: "'", canBreak: false },
{ open: "(", close: ")", canBreak: false },
{ open: "[", close: "]", canBreak: true },
{ open: "{", close: "}", canBreak: true }
]
},
utils = {
_callHook: function(hookName, passData){
var hooks = BehaveHooks.get(hookName);
passData = typeof passData=="boolean" && passData === false ? false : true;
if(hooks){
if(passData){
var theEditor = defaults.textarea,
textVal = theEditor.value,
caretPos = utils.cursor.get(),
i;
for(i=0; i<hooks.length; i++){
hooks[i].call(undefined, {
editor: {
element: theEditor,
text: textVal,
levelsDeep: utils.levelsDeep()
},
caret: {
pos: caretPos
},
lines: {
current: utils.cursor.getLine(textVal, caretPos),
total: utils.editor.getLines(textVal)
}
});
}
} else {
for(i=0; i<hooks.length; i++){
hooks[i].call(undefined);
}
}
}
},
defineNewLine: function(){
var ta = document.createElement('textarea');
ta.value = "\n";
if(ta.value.length==2){
newLine = "\r\n";
} else {
newLine = "\n";
}
},
defineTabSize: function(tabSize){
if(typeof defaults.textarea.style.OTabSize != "undefined"){
defaults.textarea.style.OTabSize = tabSize; return;
}
if(typeof defaults.textarea.style.MozTabSize != "undefined"){
defaults.textarea.style.MozTabSize = tabSize; return;
}
if(typeof defaults.textarea.style.tabSize != "undefined"){
defaults.textarea.style.tabSize = tabSize; return;
}
},
cursor: {
getLine: function(textVal, pos){
return ((textVal.substring(0,pos)).split("\n")).length;
},
get: function() {
if (typeof document.createElement('textarea').selectionStart==="number") {
return defaults.textarea.selectionStart;
} else if (document.selection) {
var caretPos = 0,
range = defaults.textarea.createTextRange(),
rangeDupe = document.selection.createRange().duplicate(),
rangeDupeBookmark = rangeDupe.getBookmark();
range.moveToBookmark(rangeDupeBookmark);
while (range.moveStart('character' , -1) !== 0) {
caretPos++;
}
return caretPos;
}
},
set: function (start, end) {
if(!end){
end = start;
}
if (defaults.textarea.setSelectionRange) {
defaults.textarea.focus();
defaults.textarea.setSelectionRange(start, end);
} else if (defaults.textarea.createTextRange) {
var range = defaults.textarea.createTextRange();
range.collapse(true);
range.moveEnd('character', end);
range.moveStart('character', start);
range.select();
}
},
selection: function(){
var textAreaElement = defaults.textarea,
start = 0,
end = 0,
normalizedValue,
range,
textInputRange,
len,
endRange;
if (typeof textAreaElement.selectionStart == "number" && typeof textAreaElement.selectionEnd == "number") {
start = textAreaElement.selectionStart;
end = textAreaElement.selectionEnd;
} else {
range = document.selection.createRange();
if (range && range.parentElement() == textAreaElement) {
normalizedValue = utils.editor.get();
len = normalizedValue.length;
textInputRange = textAreaElement.createTextRange();
textInputRange.moveToBookmark(range.getBookmark());
endRange = textAreaElement.createTextRange();
endRange.collapse(false);
if (textInputRange.compareEndPoints("StartToEnd", endRange) > -1) {
start = end = len;
} else {
start = -textInputRange.moveStart("character", -len);
start += normalizedValue.slice(0, start).split(newLine).length - 1;
if (textInputRange.compareEndPoints("EndToEnd", endRange) > -1) {
end = len;
} else {
end = -textInputRange.moveEnd("character", -len);
end += normalizedValue.slice(0, end).split(newLine).length - 1;
}
}
}
}
return start==end ? false : {
start: start,
end: end
};
}
},
editor: {
getLines: function(textVal){
return (textVal).split("\n").length;
},
get: function(){
return defaults.textarea.value.replace(/\r/g,'');
},
set: function(data){
defaults.textarea.value = data;
}
},
fenceRange: function(){
if(typeof defaults.fence == "string"){
var data = utils.editor.get(),
pos = utils.cursor.get(),
hacked = 0,
matchedFence = data.indexOf(defaults.fence),
matchCase = 0;
while(matchedFence>=0){
matchCase++;
if( pos < (matchedFence+hacked) ){
break;
}
hacked += matchedFence+defaults.fence.length;
data = data.substring(matchedFence+defaults.fence.length);
matchedFence = data.indexOf(defaults.fence);
}
if( (hacked) < pos && ( (matchedFence+hacked) > pos ) && matchCase%2===0){
return true;
}
return false;
} else {
return true;
}
},
isEven: function(_this,i){
return i%2;
},
levelsDeep: function(){
var pos = utils.cursor.get(),
val = utils.editor.get();
var left = val.substring(0, pos),
levels = 0,
i, j;
for(i=0; i<left.length; i++){
for (j=0; j<charSettings.keyMap.length; j++) {
if(charSettings.keyMap[j].canBreak){
if(charSettings.keyMap[j].open == left.charAt(i)){
levels++;
}
if(charSettings.keyMap[j].close == left.charAt(i)){
levels--;
}
}
}
}
var toDecrement = 0,
quoteMap = ["'", "\""];
for(i=0; i<charSettings.keyMap.length; i++) {
if(charSettings.keyMap[i].canBreak){
for(j in quoteMap){
toDecrement += left.split(quoteMap[j]).filter(utils.isEven).join('').split(charSettings.keyMap[i].open).length - 1;
}
}
}
var finalLevels = levels - toDecrement;
return finalLevels >=0 ? finalLevels : 0;
},
deepExtend: function(destination, source) {
for (var property in source) {
if (source[property] && source[property].constructor &&
source[property].constructor === Object) {
destination[property] = destination[property] || {};
utils.deepExtend(destination[property], source[property]);
} else {
destination[property] = source[property];
}
}
return destination;
},
addEvent: function addEvent(element, eventName, func) {
if (element.addEventListener){
element.addEventListener(eventName,func,false);
} else if (element.attachEvent) {
element.attachEvent("on"+eventName, func);
}
},
removeEvent: function addEvent(element, eventName, func){
if (element.addEventListener){
element.removeEventListener(eventName,func,false);
} else if (element.attachEvent) {
element.detachEvent("on"+eventName, func);
}
},
preventDefaultEvent: function(e){
if(e.preventDefault){
e.preventDefault();
} else {
e.returnValue = false;
}
}
},
intercept = {
tabKey: function (e) {
if(!utils.fenceRange()){ return; }
if (e.keyCode == 9) {
utils.preventDefaultEvent(e);
var toReturn = true;
utils._callHook('tab:before');
var selection = utils.cursor.selection(),
pos = utils.cursor.get(),
val = utils.editor.get();
if(selection){
var tempStart = selection.start;
while(tempStart--){
if(val.charAt(tempStart)=="\n"){
selection.start = tempStart + 1;
break;
}
}
var toIndent = val.substring(selection.start, selection.end),
lines = toIndent.split("\n"),
i;
if(e.shiftKey){
for(i = 0; i<lines.length; i++){
if(lines[i].substring(0,tab.length) == tab){
lines[i] = lines[i].substring(tab.length);
}
}
toIndent = lines.join("\n");
utils.editor.set( val.substring(0,selection.start) + toIndent + val.substring(selection.end) );
utils.cursor.set(selection.start, selection.start+toIndent.length);
} else {
for(i in lines){
lines[i] = tab + lines[i];
}
toIndent = lines.join("\n");
utils.editor.set( val.substring(0,selection.start) + toIndent + val.substring(selection.end) );
utils.cursor.set(selection.start, selection.start+toIndent.length);
}
} else {
var left = val.substring(0, pos),
right = val.substring(pos),
edited = left + tab + right;
if(e.shiftKey){
if(val.substring(pos-tab.length, pos) == tab){
edited = val.substring(0, pos-tab.length) + right;
utils.editor.set(edited);
utils.cursor.set(pos-tab.length);
}
} else {
utils.editor.set(edited);
utils.cursor.set(pos + tab.length);
toReturn = false;
}
}
utils._callHook('tab:after');
}
return toReturn;
},
enterKey: function (e) {
if(!utils.fenceRange()){ return; }
if (e.keyCode == 13) {
utils.preventDefaultEvent(e);
utils._callHook('enter:before');
var pos = utils.cursor.get(),
val = utils.editor.get(),
left = val.substring(0, pos),
right = val.substring(pos),
leftChar = left.charAt(left.length - 1),
rightChar = right.charAt(0),
numTabs = utils.levelsDeep(),
ourIndent = "",
closingBreak = "",
finalCursorPos,
i;
if(!numTabs){
finalCursorPos = 1;
} else {
while(numTabs--){
ourIndent+=tab;
}
ourIndent = ourIndent;
finalCursorPos = ourIndent.length + 1;
for(i=0; i<charSettings.keyMap.length; i++) {
if (charSettings.keyMap[i].open == leftChar && charSettings.keyMap[i].close == rightChar){
closingBreak = newLine;
}
}
}
var edited = left + newLine + ourIndent + closingBreak + (ourIndent.substring(0, ourIndent.length-tab.length) ) + right;
utils.editor.set(edited);
utils.cursor.set(pos + finalCursorPos);
utils._callHook('enter:after');
}
},
deleteKey: function (e) {
if(!utils.fenceRange()){ return; }
if(e.keyCode == 8){
utils.preventDefaultEvent(e);
utils._callHook('delete:before');
var pos = utils.cursor.get(),
val = utils.editor.get(),
left = val.substring(0, pos),
right = val.substring(pos),
leftChar = left.charAt(left.length - 1),
rightChar = right.charAt(0),
i;
if( utils.cursor.selection() === false ){
for(i=0; i<charSettings.keyMap.length; i++) {
if (charSettings.keyMap[i].open == leftChar && charSettings.keyMap[i].close == rightChar) {
var edited = val.substring(0,pos-1) + val.substring(pos+1);
utils.editor.set(edited);
utils.cursor.set(pos - 1);
return;
}
}
var edited = val.substring(0,pos-1) + val.substring(pos);
utils.editor.set(edited);
utils.cursor.set(pos - 1);
} else {
var sel = utils.cursor.selection(),
edited = val.substring(0,sel.start) + val.substring(sel.end);
utils.editor.set(edited);
utils.cursor.set(pos);
}
utils._callHook('delete:after');
}
}
},
charFuncs = {
openedChar: function (_char, e) {
utils.preventDefaultEvent(e);
utils._callHook('openChar:before');
var pos = utils.cursor.get(),
val = utils.editor.get(),
left = val.substring(0, pos),
right = val.substring(pos),
edited = left + _char.open + _char.close + right;
defaults.textarea.value = edited;
utils.cursor.set(pos + 1);
utils._callHook('openChar:after');
},
closedChar: function (_char, e) {
var pos = utils.cursor.get(),
val = utils.editor.get(),
toOverwrite = val.substring(pos, pos + 1);
if (toOverwrite == _char.close) {
utils.preventDefaultEvent(e);
utils._callHook('closeChar:before');
utils.cursor.set(utils.cursor.get() + 1);
utils._callHook('closeChar:after');
return true;
}
return false;
}
},
action = {
filter: function (e) {
if(!utils.fenceRange()){ return; }
var theCode = e.which || e.keyCode;
if(theCode == 39 || theCode == 40 && e.which===0){ return; }
var _char = String.fromCharCode(theCode),
i;
for(i=0; i<charSettings.keyMap.length; i++) {
if (charSettings.keyMap[i].close == _char) {
var didClose = defaults.overwrite && charFuncs.closedChar(charSettings.keyMap[i], e);
if (!didClose && charSettings.keyMap[i].open == _char && defaults.autoOpen) {
charFuncs.openedChar(charSettings.keyMap[i], e);
}
} else if (charSettings.keyMap[i].open == _char && defaults.autoOpen) {
charFuncs.openedChar(charSettings.keyMap[i], e);
}
}
},
listen: function () {
if(defaults.replaceTab){ utils.addEvent(defaults.textarea, 'keydown', intercept.tabKey); }
if(defaults.autoIndent){ utils.addEvent(defaults.textarea, 'keydown', intercept.enterKey); }
if(defaults.autoStrip){ utils.addEvent(defaults.textarea, 'keydown', intercept.deleteKey); }
utils.addEvent(defaults.textarea, 'keypress', action.filter);
utils.addEvent(defaults.textarea, 'keydown', function(){ utils._callHook('keydown'); });
utils.addEvent(defaults.textarea, 'keyup', function(){ utils._callHook('keyup'); });
}
},
init = function (opts) {
if(opts.textarea){
utils._callHook('init:before', false);
utils.deepExtend(defaults, opts);
utils.defineNewLine();
if (defaults.softTabs) {
tab = " ".repeat(defaults.tabSize);
} else {
tab = "\t";
utils.defineTabSize(defaults.tabSize);
}
action.listen();
utils._callHook('init:after', false);
}
};
this.destroy = function(){
utils.removeEvent(defaults.textarea, 'keydown', intercept.tabKey);
utils.removeEvent(defaults.textarea, 'keydown', intercept.enterKey);
utils.removeEvent(defaults.textarea, 'keydown', intercept.deleteKey);
utils.removeEvent(defaults.textarea, 'keypress', action.filter);
};
init(userOpts);
};
if (typeof module !== 'undefined' && module.exports) {
module.exports = Behave;
}
if (typeof ender === 'undefined') {
this.Behave = Behave;
this.BehaveHooks = BehaveHooks;
}
if (typeof define === "function" && define.amd) {
define("behave", [], function () {
return Behave;
});
}
}).call(this);