draft-js-code


draft-js-code is a collection of low-level utilities to make code block editing in DraftJS editors nicer.

It works well with draft-js-prism or draft-js-prism-plugin.

Demo: samypesse.github.io/draft-js-code/

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- [x] Indent with TAB
- [x] Insert new line with correct indentation with ENTER
- [x] Remove indentation with DELETE
- [ ] Remove indentation with SHIFT+TAB (#6)
- [ ] Handle input of pair characters like (), [], {}, "", etc. (#3)

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``
$ npm install draft-js-code --save
`

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##### CodeUtils.hasSelectionInBlock(editorState)

Returns true if user is editing a code block. You should call this method to encapsulate all other methods when limiting code edition behaviour to code-block.

##### CodeUtils.handleKeyCommand(editorState, command)

Handle key command for code blocks, returns a new EditorState or null.

##### CodeUtils.onTab(e, editorState)

Handle user pressing tab, to insert indentation, it returns a new EditorState.

##### CodeUtils.handleReturn(e, editorState)

Handle user pressing return, to insert a new line inside the code block, it returns a new EditorState.

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`js
import React from 'react';
import Draft from 'draft-js';
import CodeUtils from 'draft-js-code';

class Editor extends React.Component {
constructor(props) {
super(props);
this.state = {
editorState: Draft.EditorState.createEmpty()
};
}

onChange = (editorState) => {
this.setState({
editorState
})
}

handleKeyCommand = (command) => {
const { editorState } = this.state;
let newState;

if (CodeUtils.hasSelectionInBlock(editorState)) {
newState = CodeUtils.handleKeyCommand(editorState, command);
}

if (!newState) {
newState = RichUtils.handleKeyCommand(editorState, command);
}

if (newState) {
this.onChange(newState);
return 'handled';
}
return 'not-handled';
}

keyBindingFn = (evt) => {
const { editorState } = this.state;
if (!CodeUtils.hasSelectionInBlock(editorState)) return Draft.getDefaultKeyBinding(evt);

const command = CodeUtils.getKeyBinding(evt);

return command || Draft.getDefaultKeyBinding(evt);
}

handleReturn = (evt) => {
const { editorState } = this.state;
if (!CodeUtils.hasSelectionInBlock(editorState)) return 'not-handled';

this.onChange(CodeUtils.handleReturn(evt, editorState));
return 'handled';
}

onTab = (evt) => {
const { editorState } = this.state;
if (!CodeUtils.hasSelectionInBlock(editorState)) return 'not-handled';

this.onChange(CodeUtils.onTab(evt, editorState));
return 'handled';
}

render() {
return (
editorState={this.state.editorState}
onChange={this.onChange}
keyBindingFn={this.keyBindingFn}
handleKeyCommand={this.handleKeyCommand}
handleReturn={this.handleReturn}
onTab={this.onTab}
/>
);
}
}
``