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iliazeus / PicturePaste

// ==UserScript==
// @name        PicturePaste
// @namespace   iliazeus.com
// @description Looks for picture "descriptions" in message inputs that end with an image file extension (e.g. "facepalm.jpg"), then swaps them with actual URLs of the images.
// @include     http://vk.com/*
// @include     https://vk.com/*
// @version     1
// @grant       none
// ==/UserScript==


var trigger = /\b(\w+)(\.jpg|\.gif|\.png)/g;

var subst = {
    'facepalm.jpg': 'http://i.imgsafe.org/e1ef84aafe.jpg',
    'doge.jpg': 'http://i.imgsafe.org/e1ef51ab15.jpg'
};

var replace_func = function (match) {
    console.log('replaced ' + match + ' for ' + subst[match]);
    return subst[match] || match;
};

var substitute = function (area) {
    area.innerHTML = area.innerHTML.replace(trigger, replace_func);
}

var keydown_handler = function (event) {
    if (!(event.ctrlKey && event.key == ' ')) return;
    substitute(event.target);
}

for (let area of document.getElementsByClassName('im_editable')) {
    area.onkeydown = keydown_handler;
}