Exception thrown when pasting example code into WYSIWYG editor

[docent]

Version

1.4.8

Test Environment

Linux, Chromium 78.0

Current Behavior

Open the editor "basic" example, select the example below and paste into WYSIWYG editor:

var foo = function (bar) {
  return bar++;
};

Expected Behavior

No exceptions should be thrown, but the following exception is thrown:

TypeError: Cannot set property 'innerHTML' of null
    at VM25 tui-editor-Editor-full.js:107801
    at Array.forEach (<anonymous>)
    at WwClipboardManager._replaceNewLineToBr (VM25 tui-editor-Editor-full.js:107799)
    at WwClipboardManager._preparePaste (VM25 tui-editor-Editor-full.js:107947)
    at WwClipboardManager._onWillPaste (VM25 tui-editor-Editor-full.js:107813)
    at WwClipboardManager._executeHandler (VM25 tui-editor-Editor-full.js:107707)
    at VM25 tui-editor-Editor-full.js:107685
    at VM25 tui-editor-Editor-full.js:36952
    at forEachArray (VM25 tui-editor-Editor-full.js:11653)
    at Object.forEach (VM25 tui-editor-Editor-full.js:11730)

[seonim-ryu]

@docent
That's right. Thanks for the bug report.

[seonim-ryu]

Case 1

When plain text containing a newline is pasted into the editor, the newline should be changed to <br>.

<span class="highlight" style="..."><span class="colour" style="..."><span class="font" style="..."><span class="size" style="font-size:13px">foo
bar</span></span></span></span>

Case 2

Newline characters should be preserved when text containing newline characters in the code block is pasted into the editor.

<pre style="..."><code style="..."><span style="box-sizing: border-box;">var</span> foo = <span style="box-sizing: border-box;"><span style="box-sizing: border-box;">function</span> (<span style="box-sizing: border-box;">bar</span>) </span>{
  <span style="box-sizing: border-box;">return</span> bar++;
};</code><br></pre>