Apply Twitter Bootstrap stylings to CodeMirror? - css

Question

I have a form with a textarea where users can write some code. I'm replacing that textarea with a CodeMirror code editor box, so I want to apply Bootstrap stylings to it.
This is what the form looks like right now, where all the form elements except the code editor have Bootstrap stylings:
So in particular, I think I need to give the code editor rounded corners, a border, the correct width (input-xxlarge), and blue highlights when mousing over.
How do I do this? Is there a way of doing this besides manually copying over the necessary CSS?
UPDATE
I tried copying over the textarea CSS from Bootstrap, and all looks good except the focus CSS when I click inside the code editor. This is what I get:
The highlight is on the inside, instead of the outside. Any ideas how I fix this?
This is the CSS I added by copying from Bootstrap:
.CodeMirror {
line-height: 1.3em;
font-family: monospace;
/* Necessary so the scrollbar can be absolutely positioned within the wrapper on Lion. */
position: relative;
/* This prevents unwanted scrollbars from showing up on the body and wrapper in IE. */
overflow: hidden;
background-color: white;
width: 530px;
/* Copied from Bootstrap's textarea */
display: inline-block;
padding: 4px 6px;
margin-bottom: 9px;
color: #555555;
border: 1px solid #ccc;
-webkit-border-radius: 3px;
-moz-border-radius: 3px;
border-radius: 3px;
-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
-moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075);
-webkit-transition: border linear 0.2s, box-shadow linear 0.2s;
-moz-transition: border linear 0.2s, box-shadow linear 0.2s;
-ms-transition: border linear 0.2s, box-shadow linear 0.2s;
-o-transition: border linear 0.2s, box-shadow linear 0.2s;
transition: border linear 0.2s, box-shadow linear 0.2s;
}
.CodeMirror-focused {
/* Copied from Bootstrap's textarea */
border-color: rgba(82, 168, 236, 0.8);
outline: 0;
outline: thin dotted \9;
/* IE6-9 */
-webkit-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
-moz-box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.075), 0 0 8px rgba(82, 168, 236, 0.6);
}

Answer 1

Code Mirror and Bootstrap (v3 and v4):
Styling does not yet support validation states (has-error, has-warning, has-success)
.CodeMirror {
/* Bootstrap Settings */
box-sizing: border-box;
margin: 0;
font: inherit;
overflow: auto;
font-family: inherit;
display: block;
width: 100%;
padding: 6px 12px;
font-size: 14px;
line-height: 1.42857143;
color: #555;
background-color: #fff;
background-image: none;
border: 1px solid #ccc;
border-radius: 4px;
box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075); /* Bootstrap 3 */
box-shadow: none; /* Bootstrap 4 */
transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
/* Code Mirror Settings */
font-family: monospace;
position: relative;
overflow: hidden;
}
.CodeMirror-focused {
/* Bootstrap Settings */
border-color: #66afe9;
outline: 0;
box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075), 0 0 8px rgba(102, 175, 233, .6); /* Bootstrap 3 */
box-shadow: 0 0 0 .2rem rgba(0, 123, 255, .25); /* Bootstrap 4 */
transition: border-color ease-in-out .15s, box-shadow ease-in-out .15s;
}

Answer 2

CodeMirror hides the original textarea and creates a (fairly complex) structure of div and pre elements. You can style the outermost div which has a class of .CodeMirror to achieve the same effect.
This will require customizing the CodeMirror stylesheet or adding your own style for the class/element. If you are building Bootstrap using LESS, there may be a way to apply a mixin to avoid duplicating the textarea style, though the amount of duplication is probably minimal.