qownnotes-scripts/symbol-buttons/symbol-buttons.qml

import QtQml 2.2
import QOwnNotesTypes 1.0

/// This script adds toolbar buttons to insert characters set in script options

Script {
    property string symbolString
    property var symbolList
    
    property variant settingsVariables: [
        {
            "identifier": "symbolString",
            "name": "Symbols to insert with buttons",
            "description": "Put any unicode characters separated by spaces. You can group multiple symbols together.",
            "type": "string",
            "default": "∑ ∫ ∮",
        }
    ]
    
    function init() {
        if (symbolString) {
            symbolList = symbolString.split(' ')
            for (var n = 0; n < symbolList.length; n++)
                script.registerCustomAction(symbolList[n], symbolList[n], symbolList[n])
        }
    }
 
    function customActionInvoked(symbol) {        
        if (symbolList.indexOf(symbol) != -1) {
           script.noteTextEditWrite(symbol) 
        }
    }
}