/* * Copyright (C) 2020 Yomichan Authors * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ /* globals * DOMDataBinder */ class GenericSettingController { constructor(settingsController) { this._settingsController = settingsController; this._defaultScope = 'profile'; this._dataBinder = new DOMDataBinder({ selector: '[data-setting]', createElementMetadata: this._createElementMetadata.bind(this), compareElementMetadata: this._compareElementMetadata.bind(this), getValues: this._getValues.bind(this), setValues: this._setValues.bind(this) }); this._transforms = new Map([ ['setAttribute', this._setAttribute.bind(this)], ['setVisibility', this._setVisibility.bind(this)], ['splitTags', this._splitTags.bind(this)], ['joinTags', this._joinTags.bind(this)], ['toNumber', this._toNumber.bind(this)], ['toString', this._toString.bind(this)], ['conditionalConvert', this._conditionalConvert.bind(this)] ]); } async prepare() { this._dataBinder.observe(document.body); this._settingsController.on('optionsChanged', this._onOptionsChanged.bind(this)); } async refresh() { await this._dataBinder.refresh(); } // Private _onOptionsChanged() { this._dataBinder.refresh(); } _createElementMetadata(element) { const {dataset: {setting: path, scope, transform: transformRaw}} = element; let transforms; if (typeof transformRaw === 'string') { transforms = JSON.parse(transformRaw); if (!Array.isArray(transforms)) { transforms = [transforms]; } } else { transforms = []; } return { path, scope, transforms, transformRaw }; } _compareElementMetadata(metadata1, metadata2) { return ( metadata1.path === metadata2.path && metadata1.scope === metadata2.scope && metadata1.transformRaw === metadata2.transformRaw ); } async _getValues(targets) { const defaultScope = this._defaultScope; const settingsTargets = []; for (const {metadata: {path, scope}} of targets) { const target = { path, scope: scope || defaultScope }; settingsTargets.push(target); } return this._transformResults(await this._settingsController.getSettings(settingsTargets), targets); } async _setValues(targets) { const defaultScope = this._defaultScope; const settingsTargets = []; for (const {metadata: {path, scope, transforms}, value, element} of targets) { const transformedValue = this._applyTransforms(value, transforms, 'pre', element); const target = { path, scope: scope || defaultScope, action: 'set', value: transformedValue }; settingsTargets.push(target); } return this._transformResults(await this._settingsController.modifySettings(settingsTargets), targets); } _transformResults(values, targets) { return values.map((value, i) => { const error = value.error; if (error) { return jsonToError(error); } const {metadata: {transforms}, element} = targets[i]; const result = this._applyTransforms(value.result, transforms, 'post', element); return {result}; }); } _applyTransforms(value, transforms, step, element) { for (const transform of transforms) { const transformStep = transform.step; if (typeof transformStep !== 'undefined' && transformStep !== step) { continue; } const transformFunction = this._transforms.get(transform.type); if (typeof transformFunction === 'undefined') { continue; } value = transformFunction(value, transform, element); } return value; } _getAncestor(node, ancestorDistance) { if (ancestorDistance < 0) { return document.documentElement; } for (let i = 0; i < ancestorDistance && node !== null; ++i) { node = node.parentNode; } return node; } _getRelativeElement(node, ancestorDistance, selector) { const selectorRoot = ( typeof ancestorDistance === 'number' ? this._getAncestor(node, ancestorDistance) : document ); if (selectorRoot === null) { return null; } return ( typeof selector === 'string' ? selectorRoot.querySelector(selector) : (selectorRoot === document ? document.documentElement : selectorRoot) ); } _evaluateSimpleOperation(operation, lhs, rhs) { switch (operation) { case '!': return !lhs; case '!!': return !!lhs; case '===': return lhs === rhs; case '!==': return lhs !== rhs; case '>=': return lhs >= rhs; case '<=': return lhs <= rhs; case '>': return lhs > rhs; case '<': return lhs < rhs; default: return false; } } // Transforms _setAttribute(value, data, element) { const {ancestorDistance, selector, attribute} = data; const relativeElement = this._getRelativeElement(element, ancestorDistance, selector); if (relativeElement !== null) { relativeElement.setAttribute(attribute, `${value}`); } return value; } _setVisibility(value, data, element) { const {ancestorDistance, selector, condition} = data; const relativeElement = this._getRelativeElement(element, ancestorDistance, selector); if (relativeElement !== null) { relativeElement.hidden = !this._evaluateSimpleOperation(condition.op, value, condition.value); } return value; } _splitTags(value) { return `${value}`.split(/[,; ]+/).filter((v) => !!v); } _joinTags(value) { return value.join(' '); } _toNumber(value, data) { let {constraints} = data; if (!isObject(constraints)) { constraints = {}; } return DOMDataBinder.convertToNumber(value, constraints); } _toString(value) { return `${value}`; } _conditionalConvert(value, data) { const {cases} = data; if (Array.isArray(cases)) { for (const {op, value: value2, default: isDefault, result} of cases) { if (isDefault === true) { value = result; } else if (this._evaluateSimpleOperation(op, value, value2)) { value = result; break; } } } return value; } }