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author | toasted-nutbread <toasted-nutbread@users.noreply.github.com> | 2021-07-17 17:10:25 -0400 |
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committer | GitHub <noreply@github.com> | 2021-07-17 17:10:25 -0400 |
commit | fafa746a632b1907d9cca262f689d7bec4e0f940 (patch) | |
tree | f328ef581376cbda0b9d99bd9c3f7892de50a3c1 /ext/js/dom/css-style-applier.js | |
parent | 74381302c7a658dc3fd5e6c3a76842dd430341bb (diff) |
Sandbox script folders (#1837)
* Move scripts
* Update paths
* Fix ordering
* Simplify eslint rules
Diffstat (limited to 'ext/js/dom/css-style-applier.js')
-rw-r--r-- | ext/js/dom/css-style-applier.js | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/ext/js/dom/css-style-applier.js b/ext/js/dom/css-style-applier.js deleted file mode 100644 index c617fead..00000000 --- a/ext/js/dom/css-style-applier.js +++ /dev/null @@ -1,118 +0,0 @@ -/* - * Copyright (C) 2021 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/>. - */ - -/** - * This class is used to apply CSS styles to elements using a consistent method - * that is the same across different browsers. - */ -class CssStyleApplier { - /** - * Creates a new instance of the class. - * @param styleDataUrl The local URL to the JSON file continaing the style rules. - * The style rules should be of the format: - * [ - * { - * selectors: [(selector:string)...], - * styles: [ - * [(property:string), (value:string)]... - * ] - * }... - * ] - */ - constructor(styleDataUrl) { - this._styleDataUrl = styleDataUrl; - this._styleData = []; - this._cachedRules = new Map(); - } - - /** - * Loads the data file for use. - */ - async prepare() { - this._styleData = await this._fetchJsonAsset(this._styleDataUrl); - } - - /** - * Applies CSS styles directly to the "style" attribute using the "class" attribute. - * This only works for elements with a single class. - * @param elements An iterable collection of HTMLElement objects. - */ - applyClassStyles(elements) { - const elementStyles = []; - for (const element of elements) { - const {className} = element; - if (className.length === 0) { continue; } - let cssTextNew = ''; - for (const {selectorText, styles} of this._getRulesForClass(className)) { - if (!element.matches(selectorText)) { continue; } - cssTextNew += this._getCssText(styles); - } - cssTextNew += element.style.cssText; - elementStyles.push({element, style: cssTextNew}); - } - for (const {element, style} of elementStyles) { - element.removeAttribute('class'); - if (style.length > 0) { - element.setAttribute('style', style); - } else { - element.removeAttribute('style'); - } - } - } - - // Private - - async _fetchJsonAsset(url) { - const response = await fetch(url, { - method: 'GET', - mode: 'no-cors', - cache: 'default', - credentials: 'omit', - redirect: 'follow', - referrerPolicy: 'no-referrer' - }); - if (!response.ok) { - throw new Error(`Failed to fetch ${url}: ${response.status}`); - } - return await response.json(); - } - - _getRulesForClass(className) { - let rules = this._cachedRules.get(className); - if (typeof rules !== 'undefined') { return rules; } - - rules = []; - this._cachedRules.set(className, rules); - - const classNamePattern = new RegExp(`.${className}(?![0-9a-zA-Z-])`, ''); - for (const {selectors, styles} of this._styleData) { - const selectorText = selectors.join(','); - if (!classNamePattern.test(selectorText)) { continue; } - rules.push({selectorText, styles}); - } - - return rules; - } - - _getCssText(styles) { - let cssText = ''; - for (const [property, value] of styles) { - cssText += `${property}:${value};`; - } - return cssText; - } -} |