Optimization of code block

[Jocs]

Q	A
Bug fix?	yes
Fixed tickets	#1294
License	MIT

Description

• Editor get slower when edit in code block. When running for a long time, it get slower and slower #795
• Emoji color is not transparent Emoji in editor is transparent #1448
• Highlight error in code block Incorrect parsing of multiline comments inside cpp and c language code fences #1294
• Support select content and copy paste, and respect indentation Copy paste code block does not respect indentation #942
• Fix select multiple code blocks and copy paste error Whether it is "copy" or "copy as markdown", The content in the code block, the newline is invalid. #1310
• Fix delete error in language input Delete error when cursor at the end of language input #1446
• Fix auto pair error Autocompletetion(brackets of markdown syntax) error when cursor at the beginning of line #1447
• [Feature] Add copy button on the top right of code block for copy the code block content.
• Update octokit/rest and url-loader deps.

---

This change is 

[fxha]

1. XML issue:

Coping a full document with XML code blocks destroy the XML code lines.

foo

\```xml
<BookCatalogue xmlns="http://example.org">
    <Book>
        <Title>Foo Bar</Title>
        <author>Bar Fo</Author>
        <Date>0</Date>
        <ISBN>81-40-34319-4</ISBN>
    </Book>
</BookCatalogue>
\```

bar

2. Ctrl+A Stack Trace:

vue.esm.js?a026:628 [Vue warn]: Error in event handler for "selectAll": "IndexSizeError: Failed to execute 'extend' on 'Selection': There is no child at offset 658."


vue.esm.js?a026:1897 DOMException: Failed to execute 'extend' on 'Selection': There is no child at offset 658.
    at Selection.extend (<anonymous>)
    at Selection.setFocus (webpack-internal:///./src/muya/lib/selection/index.js:371:15)
    at Selection.setCursorRange (webpack-internal:///./src/muya/lib/selection/index.js:524:10)
    at ContentState.setCursor (webpack-internal:///./src/muya/lib/contentState/index.js:194:56)
    at ContentState.partialRender (webpack-internal:///./src/muya/lib/contentState/index.js:258:12)
    at ContentState.selectAll (webpack-internal:///./src/muya/lib/contentState/paragraphCtrl.js:952:19)
    at Muya.selectAll (webpack-internal:///./src/muya/lib/index.js:388:25)
    at VueComponent.handleSelectAll (webpack-internal:///./node_modules/babel-loader/lib/index.js?!./node_modules/vue-loader/lib/index.js?!./src/renderer/components/editorWithTabs/editor.vue?vue&type=script&lang=js&:701:21)
    at invokeWithErrorHandling (webpack-internal:///./node_modules/vue/dist/vue.esm.js:1862:26)
    at Vue.$emit (webpack-internal:///./node_modules/vue/dist/vue.esm.js:3885:9)

Example:

Ctrl+A in special code blocks no longer works. Paste example below and Ctrl+A inside code block.

foo

\```xml
<?xml version="1.0" encoding="UTF-8"?>
<BookCatalogue xmlns="http://www.publishing.org">
    <Book>
        <Title>Yogasana Vijnana: the Science of Yoga</Title>
        <author>Dhirendra Brahmachari</Author>
        <Date>1966</Date>
        <ISBN>81-40-34319-4</ISBN>
        <Publisher>Dhirendra Yoga Publications</Publisher>
        <Cost currency="INR">11.50</Cost>
    </Book>
    <Book>
        <Title>The First and Last Freedom</Title>
        <Author>J. Krishnamurti</Author>
        <Date>1954</Date>
        <ISBN>0-06-064831-7</ISBN>
        <Publisher>Harper &amp; Row</Publisher>
        <Cost currency="USD">2.95</Cost>
    </Book>
</BookCatalogue>
\```

foo

3. First line issue

Paste example below and, switch to preview mode and press Enter followed by Arrow-Up. The cursor jumps to the language identifier and not first line.

```cpp
int i = 0;
```

[Jocs]

Paste example below and, switch to preview mode and press Enter followed by Arrow-Up. The cursor jumps to the language identifier and not first line.

I can not reproduce this issue, where is the cursor before press Enter and Arrow-Up?

[Jocs]

Ctrl+A Stack Trace:

How strange, there must be some special characters that cause this issue, because it get ok after I edit some new content in the code block.

It's due to &

[Jocs]

@fxha #1456 is blocked, because it depends on the codes in this PR, so I think we can use issues to track following bugs in this PRs, and merged first? if no severe bugs.

[Jocs]

@fxha I merge this PR now, because #1456 depends on this PRs, you can submit issues if you find new bugs. and XSS issue and Ctrl+A Stack Trace have been fixed, the third bug, I can not reproduce it, please submit a new issue, if you can always reproduce it. thanks.