Niconico Comment Font Force

Force niconico comments to use custom font + weight/style

Du musst eine Erweiterung wie Tampermonkey, Greasemonkey oder Violentmonkey installieren, um dieses Skript zu installieren.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

Sie müssten eine Skript Manager Erweiterung installieren damit sie dieses Skript installieren können

(Ich habe schon ein Skript Manager, Lass mich es installieren!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Niconico Comment Font Force
// @namespace    http://tampermonkey.net/
// @version      1.4
// @description  Force niconico comments to use custom font + weight/style
// @match        https://*.nicovideo.jp/*
// @match        https://*.nicochannel.jp/*
// @run-at       document-start
// @license MIT
// ==/UserScript==

(function() {
    "use strict";

    /* -------------------------
     *  ★ ユーザー設定 ここから
     * ------------------------- */

    // フォント名(複数候補OK)
    const FONT_FAMILY = `HiramaruAA, "HiraMaruProN-W4", "Hiragino Maru Gothic ProN", sans-serif`;

    // フォントサイズの倍率(1.0 = 元の大きさ)
    const FONT_SIZE_SCALE = 1.0;

    // フォントの色(CSS 色指定)
    const FONT_COLOR = "#ffffff";

    // ▼追加:文字の太さ・スタイル
    const FONT_WEIGHT = "normal"; // normal | bold
    const FONT_STYLE = "normal"; // normal | italic

    /* -------------------------
     *  ★ ユーザー設定 ここまで
     * ------------------------- */


    /* ============================================================
       Canvas の font を書き換える
       ============================================================ */

    const fontDesc = Object.getOwnPropertyDescriptor(CanvasRenderingContext2D.prototype, "font");
    if (!fontDesc) return;

    Object.defineProperty(CanvasRenderingContext2D.prototype, "font", {
        set(value) {

            // --- 元のサイズを取得 ---
            const sizeMatch = value.match(/(\d+(\.\d+)?)px/i);
            const origSize = sizeMatch ? parseFloat(sizeMatch[1]) : 20;
            const newSize = (origSize * FONT_SIZE_SCALE) + "px";

            // ---- 元の font を構造解析 ----
            // "italic bold 24px sans-serif" → ["italic", "bold"]
            const hasBold = /\bbold\b/i.test(value);
            const hasItalic = /\bitalic\b/i.test(value);

            // ---- スタイル構築 ----
            const finalStyle = FONT_STYLE;
            const finalWeight = FONT_WEIGHT;

            // ---- 最終フォント ----
            const forcedFont =
                `${finalStyle} ${finalWeight} ${newSize} ${FONT_FAMILY}`;

            fontDesc.set.call(this, forcedFont);
        },
        get: fontDesc.get
    });


    /* ============================================================
       fillStyle (色) を固定する
       ============================================================ */

    const fillStyleDesc = Object.getOwnPropertyDescriptor(CanvasRenderingContext2D.prototype, "fillStyle");
    if (fillStyleDesc) {
        Object.defineProperty(CanvasRenderingContext2D.prototype, "fillStyle", {
            set(value) {
                fillStyleDesc.set.call(this, FONT_COLOR);
            },
            get: fillStyleDesc.get
        });
    }

})();