// ==UserScript==
// @name         Google docs
// @include      https://*docs.google.*/document/*
// @require    http://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js
// ==/UserScript==
// sources:
// for iframe https://stackoverflow.com/a/46217408/3154274
// for switch https://stackoverflow.com/q/13362028/3154274
// combinaison of key  https://stackoverflow.com/a/37559790/3154274
// dispatchEvent https://stackoverflow.com/a/33887557/3154274
// simulate keypress https://stackoverflow.com/a/26863396/3154274    or https://stackoverflow.com/a/5920206/3154274


// js key code http://keycode.info/

// listen for key shorcuts on the text part of google gocs
var editingIFrame = $('iframe.docs-texteventtarget-iframe')[0];
if (editingIFrame) {
    editingIFrame.contentDocument.addEventListener("keydown", hook, false);
}

// match the key with the color
function hook(key) {

    if (key.altKey  &&  key.code === "KeyQ") {
        var button = document.getElementById("zoomSelect");
        callMouseEvent(button);
        keyEvent(button);

  }


}

//call each mouse event
function callMouseEvent(button){
    triggerMouseEvent (button, "mouseover");
    triggerMouseEvent (button, "mousedown");
    triggerMouseEvent (button, "mouseup");
}

// send mouse even
function triggerMouseEvent (node, eventType) {
    var eventObj        = document.createEvent('MouseEvents');
    eventObj.initEvent (eventType, true, true);
    node.dispatchEvent   (eventObj);
}


// send keyboard event
function keyEvent(node) {

var eventObj = document.createEvent("KeyboardEvent");
(eventObj.initKeyEvent || eventObj.initKeyboardEvent)("keypress", true, true, null,
               0, 0, 0, 0,
               0, character.charCodeAt(9));

node.dispatchEvent(eventObj);


}