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+/*
+ * 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/>.
+ */
+
+class StructuredContentGenerator {
+ constructor(templates, mediaLoader, document) {
+ this._templates = templates;
+ this._mediaLoader = mediaLoader;
+ this._document = document;
+ }
+
+ createStructuredContent(content, dictionary) {
+ if (typeof content === 'string') {
+ return this._createTextNode(content);
+ }
+ if (!(typeof content === 'object' && content !== null)) {
+ return null;
+ }
+ if (Array.isArray(content)) {
+ const fragment = this._createDocumentFragment();
+ for (const item of content) {
+ const child = this.createStructuredContent(item, dictionary);
+ if (child !== null) { fragment.appendChild(child); }
+ }
+ return fragment;
+ }
+ const {tag} = content;
+ switch (tag) {
+ case 'br':
+ return this._createStructuredContentElement(tag, content, dictionary, 'simple', false, false);
+ case 'ruby':
+ case 'rt':
+ case 'rp':
+ return this._createStructuredContentElement(tag, content, dictionary, 'simple', true, false);
+ case 'table':
+ return this._createStructuredContentTableElement(tag, content, dictionary);
+ case 'thead':
+ case 'tbody':
+ case 'tfoot':
+ case 'tr':
+ return this._createStructuredContentElement(tag, content, dictionary, 'table', true, false);
+ case 'th':
+ case 'td':
+ return this._createStructuredContentElement(tag, content, dictionary, 'table-cell', true, true);
+ case 'div':
+ case 'span':
+ return this._createStructuredContentElement(tag, content, dictionary, 'simple', true, true);
+ case 'img':
+ return this.createDefinitionImage(content, dictionary);
+ }
+ return null;
+ }
+
+ createDefinitionImage(data, dictionary) {
+ const {
+ path,
+ width,
+ height,
+ preferredWidth,
+ preferredHeight,
+ title,
+ pixelated,
+ imageRendering,
+ appearance,
+ background,
+ collapsed,
+ collapsible,
+ verticalAlign,
+ sizeUnits
+ } = data;
+
+ const hasPreferredWidth = (typeof preferredWidth === 'number');
+ const hasPreferredHeight = (typeof preferredHeight === 'number');
+ const aspectRatio = (
+ hasPreferredWidth && hasPreferredHeight ?
+ preferredWidth / preferredHeight :
+ width / height
+ );
+ const usedWidth = (
+ hasPreferredWidth ?
+ preferredWidth :
+ (hasPreferredHeight ? preferredHeight * aspectRatio : width)
+ );
+
+ const node = this._templates.instantiate('gloss-item-image');
+ const imageContainer = node.querySelector('.gloss-image-container');
+ const aspectRatioSizer = node.querySelector('.gloss-image-aspect-ratio-sizer');
+ const image = node.querySelector('.gloss-image');
+ const imageBackground = node.querySelector('.gloss-image-background');
+
+ node.dataset.path = path;
+ node.dataset.dictionary = dictionary;
+ node.dataset.imageLoadState = 'not-loaded';
+ node.dataset.hasAspectRatio = 'true';
+ node.dataset.imageRendering = typeof imageRendering === 'string' ? imageRendering : (pixelated ? 'pixelated' : 'auto');
+ node.dataset.appearance = typeof appearance === 'string' ? appearance : 'auto';
+ node.dataset.background = typeof background === 'boolean' ? `${background}` : 'true';
+ node.dataset.collapsed = typeof collapsed === 'boolean' ? `${collapsed}` : 'false';
+ node.dataset.collapsible = typeof collapsible === 'boolean' ? `${collapsible}` : 'true';
+ if (typeof verticalAlign === 'string') {
+ node.dataset.verticalAlign = verticalAlign;
+ }
+ if (typeof sizeUnits === 'string' && (hasPreferredWidth || hasPreferredHeight)) {
+ node.dataset.sizeUnits = sizeUnits;
+ }
+
+ imageContainer.style.width = `${usedWidth}em`;
+ if (typeof title === 'string') {
+ imageContainer.title = title;
+ }
+
+ aspectRatioSizer.style.paddingTop = `${aspectRatio * 100.0}%`;
+
+ if (this._mediaLoader !== null) {
+ this._mediaLoader.loadMedia(
+ path,
+ dictionary,
+ (url) => this._setImageData(node, image, imageBackground, url, false),
+ () => this._setImageData(node, image, imageBackground, null, true)
+ );
+ }
+
+ return node;
+ }
+
+ // Private
+
+ _createElement(tagName) {
+ return this._document.createElement(tagName);
+ }
+
+ _createTextNode(data) {
+ return this._document.createTextNode(data);
+ }
+
+ _createDocumentFragment() {
+ return this._document.createDocumentFragment();
+ }
+
+ _setImageData(node, image, imageBackground, url, unloaded) {
+ if (url !== null) {
+ image.src = url;
+ node.href = url;
+ node.dataset.imageLoadState = 'loaded';
+ imageBackground.style.setProperty('--image', `url("${url}")`);
+ } else {
+ image.removeAttribute('src');
+ node.removeAttribute('href');
+ node.dataset.imageLoadState = unloaded ? 'unloaded' : 'load-error';
+ imageBackground.style.removeProperty('--image');
+ }
+ }
+
+ _createStructuredContentTableElement(tag, content, dictionary) {
+ const container = this._createElement('div');
+ container.classList = 'gloss-sc-table-container';
+ const table = this._createStructuredContentElement(tag, content, dictionary, 'table', true, false);
+ container.appendChild(table);
+ return container;
+ }
+
+ _createStructuredContentElement(tag, content, dictionary, type, hasChildren, hasStyle) {
+ const node = this._createElement(tag);
+ node.className = `gloss-sc-${tag}`;
+ switch (type) {
+ case 'table-cell':
+ {
+ const {colSpan, rowSpan} = content;
+ if (typeof colSpan === 'number') { node.colSpan = colSpan; }
+ if (typeof rowSpan === 'number') { node.rowSpan = rowSpan; }
+ }
+ break;
+ }
+ if (hasStyle) {
+ const {style} = content;
+ if (typeof style === 'object' && style !== null) {
+ this._setStructuredContentElementStyle(node, style);
+ }
+ }
+ if (hasChildren) {
+ const child = this.createStructuredContent(content.content, dictionary);
+ if (child !== null) { node.appendChild(child); }
+ }
+ return node;
+ }
+
+ _setStructuredContentElementStyle(node, contentStyle) {
+ const {style} = node;
+ const {fontStyle, fontWeight, fontSize, textDecorationLine, verticalAlign} = contentStyle;
+ if (typeof fontStyle === 'string') { style.fontStyle = fontStyle; }
+ if (typeof fontWeight === 'string') { style.fontWeight = fontWeight; }
+ if (typeof fontSize === 'string') { style.fontSize = fontSize; }
+ if (typeof verticalAlign === 'string') { style.verticalAlign = verticalAlign; }
+ if (typeof textDecorationLine === 'string') {
+ style.textDecoration = textDecorationLine;
+ } else if (Array.isArray(textDecorationLine)) {
+ style.textDecoration = textDecorationLine.join(' ');
+ }
+ }
+}