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gm_config

greasyfork configuration toolbar on the script addins

目前為 2019-09-05 提交的版本，檢視 最新版本。

此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.gf.qytechs.cn/scripts/389774/730738/gm_config.js 

// ==UserScript==
// @name         gm_config
// @version      0.0.4
// @namespace    https://github.com/niubilityfrontend
// @description  greasyfork configuration toolbar on the script addins 
// @author       jimbo
// @license      OSL-3.0
// @supportURL   https://github.com/niubilityfrontend/
// @grant        GM_xmlhttpRequest
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_listValues
// @grant        GM_deleteValue
// @grant        GM_registerMenuCommand
// ==/UserScript==
(() => {
	'use strict';

	window.GM_config = function(settings, storage = 'cfg') {
		let ret = null;

		const prefix = 'gm-config';

		const addStyle = function() {
			const css = `
				.${prefix} {
					display: grid;
					align-items: center;
					grid-row-gap: 5px;
					grid-column-gap: 10px;
					background-color: white;
					border: 1px solid black;
					padding: 5px;
					position: fixed;
					top: 0;
					right: 0;
					z-index: 2147483647;
				}

				.${prefix} label {
					grid-column: 1 / 2;
					color: black;
					text-align: right;
					font-size: small;
					font-weight: bold;
				}

				.${prefix} input,
				.${prefix} textarea,
				.${prefix} select {
					grid-column: 2 / 4;
				}

				.${prefix} .${prefix}-save {
					grid-column: 2 / 3;
				}

				.${prefix} .${prefix}-cancel {
					grid-column: 3 / 4;
				}
			`;
			if (typeof GM_addStyle === 'undefined') {
				const style = document.createElement('style');
				style.textContent = css;
				document.head.appendChild(style);
			} else {
				GM_addStyle(css);
			}
		};

		const load = function() {
			const defaults = {};
			settings.forEach(({ key, default: def }) => defaults[key] = def);

			let cfg = (typeof GM_getValue !== 'undefined') ? GM_getValue(storage) : localStorage.getItem(storage);
			if (!cfg) return defaults;

			cfg = JSON.parse(cfg);
			Object.entries(defaults).forEach(([key, value]) => {
				if (typeof cfg[key] === 'undefined') {
					cfg[key] = value;
				}
			});

			return cfg;
		};

		const save = function(cfg) {
			const data = JSON.stringify(cfg);
			(typeof GM_setValue !== 'undefined') ? GM_setValue(storage, data) : localStorage.setItem(storage, data);
		};

		const setup = function() {
			const createContainer = function() {
				const form = document.createElement('form');
				form.classList.add(prefix);
				return form;
			};
			const createTextbox = function(name, value, placeholder, maxLength, multiline, resize) {
				const input = document.createElement(multiline ? 'textarea' : 'input');
				if (multiline) {
					input.style.resize = resize ? 'vertical' : 'none';
				} else {
					input.type = 'text';
				}
				input.name = name;
				if (typeof value !== 'undefined') input.value = value;
				if (placeholder) input.placeholder = placeholder;
				if (maxLength) input.maxLength = maxLength;
				return input;
			};
			const createNumber = function(name, value, placeholder, min, max, step) {
				const input = createTextbox(name, value, placeholder);
				input.type = 'number';
				if (typeof min !== 'undefined') input.min = min;
				if (typeof max !== 'undefined') input.max = max;
				if (typeof step !== 'undefined') input.step = step;
				return input;
			};
			const createSelect = function(name, options, value, showBlank) {
				const select = document.createElement('select');
				select.name = name;

				const createOption = function(val) {
					const { value = val, text = val } = val;
					const option = document.createElement('option');
					option.value = value;
					option.textContent = text;
					return option;
				};

				if (showBlank) {
					select.appendChild(createOption(''));
				}

				options.forEach(opt => {
					if (typeof opt.optgroup !== 'undefined') {
						const optgroup = document.createElement('optgroup');
						optgroup.label = opt.optgroup;
						select.appendChild(optgroup);
						opt.values.forEach(value => optgroup.appendChild(createOption(value)));
					} else {
						select.appendChild(createOption(opt));
					}
				});

				select.value = value;
				return select;
			};
			const createCheckbox = function(name, checked) {
				const checkbox = document.createElement('input');
				checkbox.id = `${prefix}-${name}`;
				checkbox.type = 'checkbox';
				checkbox.name = name;
				checkbox.checked = checked;
				return checkbox;
			};
			const createButton = function(text, onclick, classname) {
				const button = document.createElement('button');
				button.classList.add(`${prefix}-${classname}`);
				button.textContent = text;
				button.onclick = onclick;
				return button;
			};
			const createLabel = function(label, htmlFor) {
				const lbl = document.createElement('label');
				if (htmlFor) lbl.htmlFor = htmlFor;
				lbl.textContent = label;
				return lbl;
			};
			const init = function(cfg) {
				const controls = {};

				const div = createContainer();
				settings.filter(({ type }) => type !== 'hidden').forEach(setting => {
					const value = cfg[setting.key];

					let control;
					if (setting.type === 'text') {
						control = createTextbox(setting.key, value, setting.placeholder, setting.maxLength, setting.multiline, setting.resizable);
					} else if (setting.type === 'number') {
						control = createNumber(setting.key, value, setting.placeholder, setting.min, setting.max, setting.step);
					} else if (setting.type === 'dropdown') {
						control = createSelect(setting.key, setting.values, value, setting.showBlank);
					} else if (setting.type === 'bool') {
						control = createCheckbox(setting.key, value);
					}

					div.appendChild(createLabel(setting.label, control.id));
					div.appendChild(control);
					controls[setting.key] = control;

					control.addEventListener(setting.type === 'dropdown' ? 'change' : 'input', () => {
						if (ret.onchange) {
							const control = controls[setting.key];
							const value = setting.type === 'bool' ? control.checked : control.value;
							ret.onchange(setting.key, value);
						}
					});
				});

				div.appendChild(createButton('Save', () => {
					settings.filter(({ type }) => type !== 'hidden').forEach(({ key, type }) => {
						const control = controls[key];
						cfg[key] = type === 'bool' ? control.checked : control.value;
					});
					save(cfg);

					if (ret.onsave) {
						ret.onsave(cfg);
					}

					div.remove();
				}, 'save'));

				div.appendChild(createButton('Cancel', () => {
					if (ret.oncancel) {
						ret.oncancel(cfg);
					}
					div.remove();
				}, 'cancel'));

				document.body.appendChild(div);
			};
			init(load());
		};

		addStyle();

		ret = {
			load,
			save,
			setup
		};
		return ret;
	};
})();

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