There are 2 previous versions of this script.
scr_meta=<><![CDATA[
// ==UserScript==
// @name SU Contrast Control
// @version 0.8
// @namespace http://www.foresthippy.com
// @description ForestHippy
// @include http://*.stumbleupon.com/*
// @license http://www.opensource.org/licenses/gpl-2.0.php
// ==/UserScript==
]]></>.toString();
GM_registerMenuCommand ('Set SU color intensity', setIntensity);
GM_registerMenuCommand ('Set SU color saturation', setSaturation);
DEFAULT_INTENSITY = 3;
DEFAULT_SATURATION = 3;
if (GM_getValue ('intensity', -1) == -1) {
GM_setValue ('intensity', DEFAULT_INTENSITY);
}
if (GM_getValue ('saturation', -1) == -1) {
GM_setValue ('saturation', DEFAULT_SATURATION);
}
reloadStyleSheet ();
function reloadStyleSheet () {
var ss = document.getElementById ('stylepreview');
if (ss) {
var url = ss.href;
GM_xmlhttpRequest ({
method: 'GET',
url: url,
headers: {
'User-agent': 'Mozilla/4.0 (compatible) Greasemonkey',
'Accept': 'text/html',
},
onload: function(response) {
var styleSheet;
var content = response.responseText;
styleSheet = document.createElement ('style');
styleSheet.type = 'text/css';
styleSheet.innerHTML = content;
document.getElementsByTagName ('head')[0].appendChild (styleSheet);
modifyStylesheet ();
}
});
}
}
function modifyStylesheet () {
var styleSheet = document.styleSheets[document.styleSheets.length-1];
var ss;
var i, background, color, newcolor, bodybg=0xFFFFFF;
for (i=0; i<styleSheet.cssRules.length; i++) {
if (styleSheet.cssRules[i].selectorText == 'body') {
bodybg = colorToNum(styleSheet.cssRules[i].style.backgroundColor);
break;
}
}
for (i=0; i<styleSheet.cssRules.length; i++) {
if (styleSheet.cssRules[i].style.color !== '') {
if (styleSheet.cssRules[i].style.backgroundColor !== '') {
background = colorToNum (styleSheet.cssRules[i].style.backgroundColor);
} else {
background = bodybg;
}
color = colorToNum (styleSheet.cssRules[i].style.color);
if (colorLuma (color) > colorLuma (background)) {
newcolor = colorTarget (color, 0xFFFFFF,GM_getValue ('intensity')/10);
newcolor = colorSaturate (newcolor, GM_getValue ('saturation')/10);
} else {
newcolor = colorTarget (color, 0, GM_getValue ('intensity')/10);
newcolor = colorSaturate (newcolor, GM_getValue ('saturation')/10);
}
styleSheet.cssRules[i].style.setProperty ('color', numToColor (newcolor), styleSheet.cssRules[i].style.getPropertyPriority('color'));
}
GM_log (numToColor (color)+' changed to '+numToColor (newcolor));
}
}
function colorTarget (colorNum, target, coeff) {
var r0 = ((0xFF0000 & colorNum) >> 16);
var g0 = ((0x00FF00 & colorNum) >> 8);
var b0 = (0x0000FF & colorNum);
var rt = ((0xFF0000 & target) >> 16);
var gt = ((0x00FF00 & target) >> 8);
var bt = (0x0000FF & target);
var dr = (rt - r0) * coeff;
var dg = (gt - g0) * coeff;
var db = (bt - b0) * coeff;
var r1 = Math.round (r0 + dr);
var g1 = Math.round (g0 + dg);
var b1 = Math.round (b0 + db);
return (r1 << 16) + (g1 << 8) + b1;
}
function colorLuma (colorNum) {
var r = (0xFF0000 & colorNum) >> 16;
var g = (0x00FF00 & colorNum) >> 8;
var b = 0x0000FF & colorNum;
return Math.round (0.30 * r + 0.59 * g + 0.11 * b);
}
function colorSaturate (colorNum, coeff) {
var r0 = ((0xFF0000 & colorNum) >> 16);
var g0 = ((0x00FF00 & colorNum) >> 8);
var b0 = (0x0000FF & colorNum);
var col0 = new Array (r0, g0, b0);
var sat = new Array (3);
var h, m, l, colorSat;
if (r0 == g0 && g0 == b0) {
return colorNum; // Special grey case
} else {
if (r0 >= g0 && r0 >= b0) {
h = 0;
if (g0 > b0) {
m = 1;
l = 2;
} else {
m = 2;
l = 1;
}
} else if (g0 >= r0 && g0 >= b0) {
h = 1;
if (r0 > b0) {
m = 0;
l = 2;
} else {
m = 2;
l = 0;
}
} else {
h = 2;
if (r0 > g0) {
m = 0;
l = 1;
} else {
m = 1;
l = 0;
}
}
}
sat[h] = col0[h];
sat[l] = 0;
sat[m] = col0[h] * ((col0[m] - col0[l]) / (col0[h] - col0[l]));
colorSat = (sat[0] << 16) + (sat[1] << 8) + sat[2];
return colorTarget (colorNum, colorSat, coeff);
}
function colorToNum (colorString) {
var colorExec = /^rgb\((\d{1,3}),\s*(\d{1,3}),\s*(\d{1,3})\)$/.exec (colorString);
var r = Number (colorExec[1]);
var g = Number (colorExec[2]);
var b = Number (colorExec[3]);
return (r << 16) + (g << 8) + b;
}
function numToColor (colorNum) {
var r = (0xFF0000 & colorNum) >> 16;
var g = (0x00FF00 & colorNum) >> 8;
var b = 0x0000FF & colorNum;
return ('rgb('+r+', '+g+', '+b+')');
}
function setIntensity () {
var i = prompt ('Enter intensity value between 0 and 10\n0 has no effect\n10 tends bright colors to white and dark colors to black', GM_getValue ('intensity'));
n = Number (i);
if (!isNaN (n)) {
if (n >= 0 && n <= 10) {
GM_setValue ('intensity', Math.round(n));
window.location.href=window.location.href;
}
}
}
function setSaturation () {
var i = prompt ('Enter saturation value between 0 and 10\n0 has no effect\n10 is full color saturation', GM_getValue ('saturation'));
n = Number (i);
if (!isNaN (n)) {
if (n >= 0 && n <= 10) {
GM_setValue ('saturation', Math.round(n));
window.location.href=window.location.href;
}
}
}
//////////////////////////////////////////////
// Update Code:
// http://userscripts.org/scripts/show/38017
// by sizzlemctwizzle
CheckScriptForUpdate = {
// Config values, change these to match your script
id: '50934', // Script id on Userscripts.org
days: 2, // Days to wait between update checks
name: /\/\/\s*@name\s+(.*)\s*\n/i.exec(scr_meta)[1],
version: /\/\/\s*@version\s+(.*)\s*\n/i.exec(scr_meta)[1].replace(/\./g, ''),
time: new Date().getTime() | 0,
call: function(response) {
GM_xmlhttpRequest({
method: 'GET',
url: 'https://userscripts.org/scripts/source/'+this.id+'.meta.js',
onload: function(xpr) {CheckScriptForUpdate.compare(xpr,response);}
});
},
compare: function(xpr,response) {
this.xversion=/\/\/\s*@version\s+(.*)\s*\n/i.exec(xpr.responseText);
this.xname=/\/\/\s*@name\s+(.*)\s*\n/i.exec(xpr.responseText);
if ( (this.xversion) && (this.xname[1] == this.name) ) {
this.xversion = this.xversion[1].replace(/\./g, '');
this.xname = this.xname[1];
} else {
if ( (xpr.responseText.match('Uh-oh! The page could not be found!')) || (this.xname[1] != this.name) ) GM_setValue('updated', 'off');
return false;
}
if ( (this.xversion > this.version) && (confirm('A new version of the '+this.xname+' user script is available. Do you want to update?')) ) {
GM_setValue('updated', this.time);
GM_openInTab('http://userscripts.org/scripts/source/'+this.id+'.user.js');
} else if ( (this.xversion) && (this.xversion > this.version) ) {
if(confirm('Do you want to turn off auto updating for this script?')) {
GM_setValue('updated', 'off');
GM_registerMenuCommand("Auto Update "+this.name, function(){GM_setValue('updated', new Date().getTime() | 0);CheckScriptForUpdate.call('return');});
alert('Automatic updates can be re-enabled for this script from the User Script Commands submenu.');
} else {
GM_setValue('updated', this.time);
}
} else {
if(response) alert('No updates available for '+this.name);
GM_setValue('updated', this.time);
}
},
check: function() {
if (GM_getValue('updated', 0) == 0) GM_setValue('updated', this.time);
if ( (GM_getValue('updated', 0) != 'off') && (+this.time > (+GM_getValue('updated', 0) + (1000*60*60*24*this.days))) ) {
this.call();
} else if (GM_getValue('updated', 0) == 'off') {
GM_registerMenuCommand("Enable "+this.name+" updates", function(){GM_setValue('updated', new Date().getTime() | 0);CheckScriptForUpdate.call(true);});
} else {
GM_registerMenuCommand("Check "+this.name+" for updates", function(){GM_setValue('updated', new Date().getTime() | 0);CheckScriptForUpdate.call(true);});
}
}
};
if (self.location == top.location && typeof GM_xmlhttpRequest != 'undefined') CheckScriptForUpdate.check();
