1 files changed, 138 insertions, 0 deletions
diff --git a/assets/vendor/text-caret/index.js b/assets/vendor/text-caret/index.js
new file mode 100644
index 00000000..0b06d12b
--- /dev/null
+++ b/assets/vendor/text-caret/index.js
@@ -0,0 +1,138 @@
+/* jshint browser: true */
+
+(function () {
+
+// We'll copy the properties below into the mirror div.
+// Note that some browsers, such as Firefox, do not concatenate properties
+// into their shorthand (e.g. padding-top, padding-bottom etc. -> padding),
+// so we have to list every single property explicitly.
+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);
+  }
+
+  // The mirror div will replicate the textarea's style
+  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 ? window.getComputedStyle(element) : element.currentStyle;  // currentStyle for IE < 9
+  var isInput = element.nodeName === 'INPUT';
+
+  // Default textarea styles
+  style.whiteSpace = 'pre-wrap';
+  if (!isInput)
+    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) {
+    if (isInput && prop === 'lineHeight') {
+      // Special case for <input>s because text is rendered centered and line height may be != height
+      style.lineHeight = computed.height;
+    } else {
+      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 (isInput)
+    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 no need to 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']),
+    height: parseInt(computed['lineHeight'])
+  };
+
+  if (debug) {
+    span.style.backgroundColor = '#aaa';
+  } else {
+    document.body.removeChild(div);
+  }
+
+  return coordinates;
+}
+
+if (typeof module != 'undefined' && typeof module.exports != 'undefined') {
+  module.exports = getCaretCoordinates;
+} else if(isBrowser) {
+  window.getCaretCoordinates = getCaretCoordinates;
+}
+
+}());