slate-edit-code/dist/onTab.js

A Slate plugin to handle keyboard events in code blocks.

'use strict';

var getIndent = require('./getIndent');
var indentLines = require('./transforms/indentLines');

/**
 * User pressed Tab in an editor:
 * Insert a tab after detecting it from code block content.
 */
function onTab(event, data, state) {
    event.preventDefault();
    event.stopPropagation();

    var startBlock = state.startBlock;
    var isCollapsed = state.isCollapsed;

    var transform = state.transform();

    var innerText = startBlock.text;
    var indent = getIndent(innerText);

    // Selection is collapsed, we just insert a new tab
    if (isCollapsed) {
        return transform.insertText(indent).focus().apply();
    }

    // We indent all selected lines
    return indentLines(transform, indent).apply();
}

module.exports = onTab;