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no-newlines.js
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no-newlines.js
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/**
* Add a configuration option to CodeMirror called "noNewlines" that when set as
* 'true' will prevent any newline characters from being typed into the
* CodeMirror editor and any newline character pasted into the editor will be
* replaced by a single space.
*
* @default false
*/
(function(mod) {
if (typeof exports === 'object' && typeof module === 'object') {
// CommonJS
mod(require('codemirror'))
} else if (typeof define === 'function' && define.amd) {
// AMD
define(['codemirror'], mod)
} else {
// Plain browser
mod(CodeMirror)
}
})(function(CodeMirror) {
function beforeChange (cm, event) {
// Identify typing events that add a newline to the buffer.
var hasTypedNewline = (
event.origin ==='+input' &&
typeof event.text === 'object' &&
event.text.join('') === '')
// Prevent newline characters from being added to the buffer.
if (hasTypedNewline) {
return event.cancel()
}
// Identify paste events.
var hasPastedNewline = (
event.origin === 'paste' &&
typeof event.text === 'object' &&
event.text.length > 1)
// Format pasted text to replace newlines with spaces.
if (hasPastedNewline) {
var newText = event.text.join(' ')
return event.update(null, null, [newText])
}
return null
}
CodeMirror.defineOption('noNewlines', false, function (cm, val, old) {
// Handle attaching/detaching event listners as necessary.
if (val === true && old !== true) {
cm.on('beforeChange', beforeChange)
} else if (val === false && old === true) {
cm.off('beforeChange', beforeChange)
}
})
})