slate-edit-code/dist/onEnter.js

A Slate plugin to handle keyboard events in code blocks.

'use strict';

var LineAnchor = require('./LineAnchor');
var getLines = require('./getLines');
var getNewLine = require('./getNewLine');
var getIndent = require('./getIndent');

/**
 * User pressed Enter in an editor:
 * Insert a soft line and start it with the indentation from previous line
 */
function onEnter(event, data, state) {
    if (!state.isCollapsed) {
        return;
    }

    // Exit the code block
    // By letting the next plugin/core handle this event
    if (data.isMod) {
        return;
    }

    event.preventDefault();

    var startBlock = state.startBlock;
    var startOffset = state.startOffset;

    var blockText = startBlock.text;
    var newLine = getNewLine(blockText);
    var lines = getLines(blockText, newLine);
    var anchor = LineAnchor.getForOffset(blockText, startOffset, newLine);
    var currentLine = lines.get(anchor.line);
    var lineToInsert = newLine + getIndent(currentLine, '');

    return state.transform().insertText(lineToInsert).focus().apply();
}

module.exports = onEnter;