+// The MIT License (MIT)
+//
+// Copyright (c) 2015 Jonathan Ong me@jongleberry.com
+//
+// 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.
+//
+// https://github.com/component/textarea-caret-position
+
+(function ($) {
+
+// The properties that we copy into a mirrored div.
+// Note that some browsers, such as Firefox,
+// do not concatenate properties, i.e. padding-top, bottom etc. -> padding,
+// so we have to do every single property specifically.
+var properties = [
+ 'direction', // RTL support
+ 'boxSizing',
+ 'width', // on Chrome and IE, exclude the scrollbar, so the mirror div wraps exactly as the textarea does
+ 'height',
+ 'overflowX',
+ 'overflowY', // copy the scrollbar for IE
+
+ 'borderTopWidth',
+ 'borderRightWidth',
+ 'borderBottomWidth',
+ 'borderLeftWidth',
+ 'borderStyle',
+
+ 'paddingTop',
+ 'paddingRight',
+ 'paddingBottom',
+ 'paddingLeft',
+
+ // https://developer.mozilla.org/en-US/docs/Web/CSS/font
+ 'fontStyle',
+ 'fontVariant',
+ 'fontWeight',
+ 'fontStretch',
+ 'fontSize',
+ 'fontSizeAdjust',
+ 'lineHeight',
+ 'fontFamily',
+
+ 'textAlign',
+ 'textTransform',
+ 'textIndent',
+ 'textDecoration', // might not make a difference, but better be safe
+
+ 'letterSpacing',
+ 'wordSpacing',
+
+ 'tabSize',
+ 'MozTabSize'
+
+];
+
+var isBrowser = (typeof window !== 'undefined');
+var isFirefox = (isBrowser && window.mozInnerScreenX != null);
+
+function getCaretCoordinates(element, position, options) {
+ if(!isBrowser) {
+ throw new Error('textarea-caret-position#getCaretCoordinates should only be called in a browser');
+ }
+
+ var debug = options && options.debug || false;
+ if (debug) {
+ var el = document.querySelector('#input-textarea-caret-position-mirror-div');
+ if ( el ) { el.parentNode.removeChild(el); }
+ }
+
+ // mirrored div
+ var div = document.createElement('div');
+ div.id = 'input-textarea-caret-position-mirror-div';
+ document.body.appendChild(div);
+
+ var style = div.style;
+ var computed = window.getComputedStyle? getComputedStyle(element) : element.currentStyle; // currentStyle for IE < 9
+
+ // default textarea styles
+ style.whiteSpace = 'pre-wrap';
+ if (element.nodeName !== 'INPUT')
+ style.wordWrap = 'break-word'; // only for textarea-s
+
+ // position off-screen
+ style.position = 'absolute'; // required to return coordinates properly
+ if (!debug)
+ style.visibility = 'hidden'; // not 'display: none' because we want rendering
+
+ // transfer the element's properties to the div
+ properties.forEach(function (prop) {
+ style[prop] = computed[prop];
+ });
+
+ if (isFirefox) {
+ // Firefox lies about the overflow property for textareas: https://bugzilla.mozilla.org/show_bug.cgi?id=984275
+ if (element.scrollHeight > parseInt(computed.height))
+ style.overflowY = 'scroll';
+ } else {
+ style.overflow = 'hidden'; // for Chrome to not render a scrollbar; IE keeps overflowY = 'scroll'
+ }
+
+ div.textContent = element.value.substring(0, position);
+ // the second special handling for input type="text" vs textarea: spaces need to be replaced with non-breaking spaces - http://stackoverflow.com/a/13402035/1269037
+ if (element.nodeName === 'INPUT')
+ div.textContent = div.textContent.replace(/\s/g, '\u00a0');
+
+ var span = document.createElement('span');
+ // Wrapping must be replicated *exactly*, including when a long word gets
+ // onto the next line, with whitespace at the end of the line before (#7).
+ // The *only* reliable way to do that is to copy the *entire* rest of the
+ // textarea's content into the <span> created at the caret position.
+ // for inputs, just '.' would be enough, but why bother?
+ span.textContent = element.value.substring(position) || '.'; // || because a completely empty faux span doesn't render at all
+ div.appendChild(span);
+
+ var coordinates = {
+ top: span.offsetTop + parseInt(computed['borderTopWidth']),
+ left: span.offsetLeft + parseInt(computed['borderLeftWidth'])
+ };
+
+ if (debug) {
+ span.style.backgroundColor = '#aaa';
+ } else {
+ document.body.removeChild(div);
+ }
+
+ return coordinates;
+}
+
+$.fn.textcomplete.getCaretCoordinates = getCaretCoordinates;
+
+}(jQuery));
+