fineui/src/core/platform/web/function.js

// 浏览器相关方法
import { isString } from "../../2.base";

let __isIE;

export function isIE() {
    if (!_global.navigator) {
        return false;
    }
    if (!__isIE) {
        __isIE = /(msie|trident)/i.test(navigator.userAgent.toLowerCase());
    }

    return __isIE;
}

let __IEVersion;

export function getIEVersion() {
    if (!_global.navigator) {
        return 0;
    }
    if (__IEVersion) {
        return __IEVersion;
    }
    let version = 0;
    const agent = navigator.userAgent.toLowerCase();
    const v1 = agent.match(/(?:msie\s([\w.]+))/);
    const v2 = agent.match(/(?:trident.*rv:([\w.]+))/);
    if (v1 && v2 && v1[1] && v2[1]) {
        version = Math.max(v1[1] * 1, v2[1] * 1);
    } else if (v1 && v1[1]) {
        version = v1[1] * 1;
    } else if (v2 && v2[1]) {
        version = v2[1] * 1;
    } else {
        version = 0;
    }
    __IEVersion = version;

    return __IEVersion;
}

export function isIE9Below() {
    if (!isIE()) {
        return false;
    }

    return getIEVersion() < 9;
}

export function isEdge() {
    if (!_global.navigator) {
        return false;
    }

    return /edg/i.test(navigator.userAgent.toLowerCase());
}

export function isChrome() {
    if (!_global.navigator) {
        return false;
    }

    return /chrome/i.test(navigator.userAgent.toLowerCase());
}

export function isFireFox() {
    if (!_global.navigator) {
        return false;
    }

    return /firefox/i.test(navigator.userAgent.toLowerCase());
}

export function isOpera() {
    if (!_global.navigator) {
        return false;
    }

    return /opera/i.test(navigator.userAgent.toLowerCase());
}

export function isSafari() {
    if (!_global.navigator) {
        return false;
    }

    return /safari/i.test(navigator.userAgent.toLowerCase()) && !/chrome/i.test(navigator.userAgent.toLowerCase());
}

export function isKhtml() {
    if (!_global.navigator) {
        return false;
    }

    return /Konqueror|Safari|KHTML/i.test(navigator.userAgent);
}

export function isMac() {
    if (!_global.navigator) {
        return false;
    }

    return /macintosh|mac os x/i.test(navigator.userAgent);
}

export function isWindows() {
    if (!_global.navigator) {
        return false;
    }

    return /windows|win32/i.test(navigator.userAgent);
}

export function isSupportCss3(style) {
    if (!_global.document) {
        return false;
    }
    const prefix = ["webkit", "Moz", "ms", "o"];
    const humpString = [];
    const htmlStyle = document.documentElement.style;
    let i;
    let len;

    function _toHumb(string) {
        if (!isString(string)) {
            return "";
        }

        return string.replace(/-(\w)/g, ($0, $1) => $1.toUpperCase());
    };

    for (i = 0; i < prefix.length; i++) {
        humpString.push(_toHumb(`${prefix[i]}-${style}`));
    }
    humpString.push(_toHumb(style));

    for (i = 0, len = humpString.length; i < len; i++) {
        if (humpString[i] in htmlStyle) {
            return true;
        }
    }

    return false;
}

export function getSafariVersion() {
    if (!_global.navigator) {
        return 0;
    }
    const agent = navigator.userAgent.toLowerCase();
    const version = agent.match(/version\/([\d.]+)/);
    if (version && version[1]) {
        return version[1] * 1;
    }

    return 0;
}

export function getMinimumFontSize() {
    // not work for firefox
    const el = document.createElement("div");
    el.style.fontSize = "1px";
    document.body.appendChild(el);
    const size = getComputedStyle(el).fontSize;
    el.remove();

    return parseInt(size, 10);
}