85 lines
2.0 KiB
JavaScript
85 lines
2.0 KiB
JavaScript
(function () {
|
|
var ua = navigator.userAgent,
|
|
trim = function(string) {
|
|
return string.replace(/^[\s\uFEFF]+|[\s\uFEFF]+$/g,'')
|
|
},
|
|
valid = {
|
|
ie: 'msie',
|
|
msie: 'msie',
|
|
ff: 'firefox',
|
|
firefox: 'firefox',
|
|
safari: 'safari',
|
|
chrome: 'chrome',
|
|
opera: 'opera'
|
|
};
|
|
|
|
// from: http://stackoverflow.com/a/5918791/107722
|
|
function getVersion() {
|
|
var N = navigator.appName,
|
|
tem,
|
|
M = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
|
|
if (M && (tem= ua.match(/version\/([\.\d]+)/i))!= null) M[2] = tem[1];
|
|
M = M? [M[1], M[2]]: [N, navigator.appVersion, '-?'];
|
|
return M;
|
|
}
|
|
|
|
var ver = getVersion(),
|
|
name = ver[0].toLowerCase(),
|
|
version = parseFloat(ver[1]);
|
|
|
|
function parseBrowserTypes(string) {
|
|
var arr = string.split('or'),
|
|
passed = false,
|
|
i = 0,
|
|
l = arr.length,
|
|
split,
|
|
translatedName,
|
|
hasPlus;
|
|
|
|
for (; i < l; i++) {
|
|
split = trim(arr[i]).split(' ');
|
|
translatedName = valid[split[0].toLowerCase()];
|
|
if (!translatedName) {
|
|
throw new Error('Unrecognized browser name:' + split[0]);
|
|
}
|
|
if (translatedName === name) {
|
|
hasPlus = split[1].indexOf('+') !== -1;
|
|
if (hasPlus) {
|
|
passed = parseFloat(split[1]) <= version;
|
|
} else {
|
|
passed = parseFloat(split[1]) === version;
|
|
}
|
|
}
|
|
if (passed) break;
|
|
}
|
|
|
|
return passed;
|
|
}
|
|
|
|
window.systemRequirements = function (browserString) {
|
|
var passed = false,
|
|
failUrl,
|
|
i = 0,
|
|
l = arguments.length;
|
|
|
|
if (typeof browserString === 'string') {
|
|
if (!parseBrowserTypes(browserString)) {
|
|
return false;
|
|
}
|
|
// incr starting point for loop
|
|
i = 1
|
|
}
|
|
|
|
for (; i < l; i++) {
|
|
if (arguments[i] instanceof Function) {
|
|
if (!arguments[i]()) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
};
|
|
|
|
})();
|