64 lines
2.1 KiB
JavaScript
64 lines
2.1 KiB
JavaScript
import { Handler } from '/csspageweaver/lib/paged.esm.js';
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export default class snapToBaseline extends Handler {
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constructor(chunker, polisher, caller) {
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super(chunker, polisher, caller);
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this.baseline;
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}
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beforeParsed(content){
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this.baseline = parseFloat(getComputedStyle(document.documentElement).getPropertyValue('--baseline').trim());
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content.querySelectorAll('blockquote').forEach((bq) => {
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const prev = bq.previousElementSibling;
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if (!prev || prev.nodeName !== 'P') {
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bq.style.color = 'red';
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}
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});
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}
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renderNode(node, sourceNode){
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if (node.nodeName === 'P') {
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this.baseline = parseFloat(getComputedStyle(document.documentElement).getPropertyValue('--baseline').trim());
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if (!shouldSnap(node)) return node;
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const area = node.closest('.pagedjs_area');
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if (area) {
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const areaRect = area.getBoundingClientRect();
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const nodeRect = node.getBoundingClientRect();
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const relativeTop = nodeRect.top - areaRect.top;
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const modulo = relativeTop % this.baseline;
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if (modulo !== 0) {
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node.style.paddingTop = (this.baseline - modulo) + 'px';
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}
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}
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return node;
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}
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}
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afterPageLayout(pageElement, page, breakToken){
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const area = pageElement.querySelector('.pagedjs_area');
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if (!area) return;
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const areaRect = area.getBoundingClientRect();
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const paragraphs = pageElement.querySelectorAll('p');
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paragraphs.forEach((node) => {
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const nodeRect = node.getBoundingClientRect();
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if (nodeRect.bottom < areaRect.bottom - this.baseline) return;
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if (!shouldSnap(node)) return;
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const relativeTop = nodeRect.top - areaRect.top;
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const modulo = relativeTop % this.baseline;
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if (modulo !== 0) {
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node.style.paddingTop = (this.baseline - modulo) + 'px';
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}
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});
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}
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}
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function shouldSnap(node) {
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return !node.closest('blockquote');
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}
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