// ==UserScript==
// @name           Bitcoin Monitor Full Screen
// @namespace      none
// @description    Adds a full screen button to bottom right corner.
// @include        http://bitcoinmonitor.com/
// @include        http://bitcoinmonitor.com/#
// @include        http://www.bitcoinmonitor.com/
// @include        http://www.bitcoinmonitor.com/#
// ==/UserScript==

var bFS = false;
var scale = 0.95;

var container = document.getElementById('content');
var graph = document.getElementById('placeholder');
var slider = document.getElementById('slider_box');
var elems = document.getElementsByTagName('*');
var toggleBtn = document.createElement('a');

var defaults = Array();
var bDefaultsSet = false;

function showExcess(bShow) {
    var disp = bShow ? '' : 'none';
    
    for (var i = 0; i < elems.length; i++) {
        var e = elems[i];
        if (e.tagName == 'HEADER' || e.tagName == 'FOOTER') {
            e.style.display = disp;
        }
        if (e.hasAttribute('class')) {
            var cls = e.getAttribute('class');
            if (cls.indexOf('wrapper') != -1 || cls.indexOf('body3') != -1) {
                e.style.display = disp;
            }
        }
    }
}

function doResize() {
    if (bFS) {
        var scaleWidth = window.innerWidth * scale;
        var scaleHeight = window.innerHeight * scale;
        container.style.width = parseInt(scaleWidth) + 'px';
        container.style.height = parseInt(scaleHeight) + 'px';
        container.style.left = parseInt((window.innerWidth / 2) - (scaleWidth / 2)) + 'px';
        container.style.top = parseInt((window.innerHeight / 2) - (scaleHeight / 2)) + 'px';
    }
    unsafeWindow.refresh_viewport();
}

function toggleFS() {
    if (!bDefaultsSet) {
        defaults['gw'] = graph.style.width;
        defaults['gh'] = graph.style.height;
        defaults['cw'] = container.style.width;
        defaults['ch'] = container.style.height;
        defaults['ct'] = container.style.top;
        defaults['cl'] = container.style.left;
        defaults['cp'] = container.style.position;
        defaults['bg'] = document.body.style.background;
        bDefaultsSet = true;
    }
    
    showExcess(bFS);
    bFS = !bFS;
    if (bFS) {
        toggleBtn.textContent = 'Full Screen [on ]';
        document.body.style.background = '#FFFFFF';
        container.style.position = 'fixed';
        container.style.top = '0px';
        container.style.left = '0px';
        graph.style.width = '100%';
        graph.style.height = '100%';
        window.addEventListener('resize', doResize, false);
    } else {
        window.removeEventListener('resize', doResize, false);
        document.body.style.background = defaults['bg'];
        container.style.position = defaults['cp'];
        container.style.top = defaults['ct'];
        container.style.left = defaults['cl'];
        container.style.width = defaults['cw'];
        container.style.height = defaults['ch'];
        graph.style.width = defaults['gw'];
        graph.style.height = defaults['gh'];
        toggleBtn.textContent = 'Full Screen [off]';
    }
    doResize();
}

toggleBtn.href = '#';
toggleBtn.textContent = 'Full Screen [off]';
toggleBtn.style.position = 'fixed';
toggleBtn.style.bottom = '0px';
toggleBtn.style.right = '0px';
toggleBtn.style.zIndex = 9;
toggleBtn.style.fontFamily = 'monospace';
document.body.insertBefore(toggleBtn, document.body.lastChild);
toggleBtn.addEventListener('click', toggleFS, false);