PDF: rerender when scale changes

The fixed-layout renderer now accepts an object for the return value of
`load()` (on the `book.sections` items). If it's an object, the `src`
is the URL of the section, and `onZoom`, if present, will be called
when the viewport is zoomed. With this you can scale the page yourself
rather than relying on the renderer's own scaling with CSS transform.

Also upgraded to PDF.js 4.6.82. And now internal links are broken...
Don't know how to fix that yet.

fixed-layout.js

@@ -56,7 +56,10 @@ export class FixedLayout extends HTMLElement {
 
         this.#observer.observe(this)
     }
-    async #createFrame({ index, src }) {
+    async #createFrame({ index, src: srcOption }) {
+        const srcOptionIsString = typeof srcOption === 'string'
+        const src = srcOptionIsString ? srcOption : srcOption?.src
+        const onZoom = srcOptionIsString ? null : srcOption?.onZoom
         const element = document.createElement('div')
         const iframe = document.createElement('iframe')
         element.append(iframe)
@@ -73,8 +76,7 @@ export class FixedLayout extends HTMLElement {
         this.#root.append(element)
         if (!src) return { blank: true, element, iframe }
         return new Promise(resolve => {
-            const onload = () => {
+            iframe.addEventListener('load', () => {
-                iframe.removeEventListener('load', onload)
                 const doc = iframe.contentDocument
                 this.dispatchEvent(new CustomEvent('load', { detail: { doc, index } }))
                 const { width, height } = getViewport(doc, this.defaultViewport)
@@ -82,9 +84,9 @@ export class FixedLayout extends HTMLElement {
                     element, iframe,
                     width: parseFloat(width),
                     height: parseFloat(height),
+                    onZoom,
                 })
-            }
+            }, { once: true })
-            iframe.addEventListener('load', onload)
             iframe.src = src
         })
     }
@@ -111,11 +113,13 @@ export class FixedLayout extends HTMLElement {
                     right.height ?? blankHeight))
 
         const transform = frame => {
-            const { element, iframe, width, height, blank } = frame
+            let { element, iframe, width, height, blank, onZoom } = frame
+            if (onZoom) onZoom({ doc: frame.iframe.contentDocument, scale })
+            const iframeScale = onZoom ? scale : 1
             Object.assign(iframe.style, {
-                width: `${width}px`,
+                width: `${width * iframeScale}px`,
-                height: `${height}px`,
+                height: `${height * iframeScale}px`,
-                transform: `scale(${scale})`,
+                transform: onZoom ? 'none' : `scale(${scale})`,
                 transformOrigin: 'top left',
                 display: blank ? 'none' : 'block',
             })

pdf.js

@@ -1,534 +1,53 @@
-/* global pdfjsLib */
+import './vendor/pdfjs/pdf.mjs'
+const pdfjsLib = globalThis.pdfjsLib
+pdfjsLib.GlobalWorkerOptions.workerSrc =
+    new URL('vendor/pdfjs/pdf.worker.mjs', import.meta.url).toString()
 
-// https://github.com/mozilla/pdf.js/blob/f04967017f22e46d70d11468dd928b4cdc2f6ea1/web/text_layer_builder.css
+const fetchText = async url =>
-const textLayerBuilderCSS = `
+    await (await fetch(new URL(url, import.meta.url))).text()
-/* Copyright 2014 Mozilla Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
 
-:root {
+// https://github.com/mozilla/pdf.js/blob/642b9a5ae67ef642b9a8808fd9efd447e8c350e2/web/text_layer_builder.css
-  --highlight-bg-color: rgb(180 0 170);
+const textLayerBuilderCSS = await fetchText('vendor/pdfjs/text_layer_builder.css')
-  --highlight-selected-bg-color: rgb(0 100 0);
-}
 
-@media screen and (forced-colors: active) {
+// https://github.com/mozilla/pdf.js/blob/642b9a5ae67ef642b9a8808fd9efd447e8c350e2/web/annotation_layer_builder.css
-  :root {
+const annotationLayerBuilderCSS = await fetchText('vendor/pdfjs/annotation_layer_builder.css')
-    --highlight-bg-color: Highlight;
-    --highlight-selected-bg-color: ButtonText;
-  }
-}
 
-.textLayer {
+const render = async (page, doc, zoom) => {
-  position: absolute;
+    const scale = zoom * devicePixelRatio
-  text-align: initial;
+    doc.documentElement.style.transform = `scale(${1 / devicePixelRatio})`
-  inset: 0;
+    doc.documentElement.style.transformOrigin = 'top left'
-  overflow: hidden;
+    doc.documentElement.style.setProperty('--scale-factor', scale)
-  opacity: 0.25;
-  line-height: 1;
-  text-size-adjust: none;
-  forced-color-adjust: none;
-  transform-origin: 0 0;
-  z-index: 2;
-}
-
-.textLayer :is(span, br) {
-  color: transparent;
-  position: absolute;
-  white-space: pre;
-  cursor: text;
-  transform-origin: 0% 0%;
-}
-
-/* Only necessary in Google Chrome, see issue 14205, and most unfortunately
- * the problem doesn't show up in "text" reference tests. */
-/*#if !MOZCENTRAL*/
-.textLayer span.markedContent {
-  top: 0;
-  height: 0;
-}
-/*#endif*/
-
-.textLayer .highlight {
-  margin: -1px;
-  padding: 1px;
-  background-color: var(--highlight-bg-color);
-  border-radius: 4px;
-}
-
-.textLayer .highlight.appended {
-  position: initial;
-}
-
-.textLayer .highlight.begin {
-  border-radius: 4px 0 0 4px;
-}
-
-.textLayer .highlight.end {
-  border-radius: 0 4px 4px 0;
-}
-
-.textLayer .highlight.middle {
-  border-radius: 0;
-}
-
-.textLayer .highlight.selected {
-  background-color: var(--highlight-selected-bg-color);
-}
-
-.textLayer ::selection {
-  /*#if !MOZCENTRAL*/
-  background: blue;
-  /*#endif*/
-  background: AccentColor; /* stylelint-disable-line declaration-block-no-duplicate-properties */
-}
-
-/* Avoids https://github.com/mozilla/pdf.js/issues/13840 in Chrome */
-/*#if !MOZCENTRAL*/
-.textLayer br::selection {
-  background: transparent;
-}
-/*#endif*/
-
-.textLayer .endOfContent {
-  display: block;
-  position: absolute;
-  inset: 100% 0 0;
-  z-index: -1;
-  cursor: default;
-  user-select: none;
-}
-
-.textLayer .endOfContent.active {
-  top: 0;
-}
-`
-
-//https://github.com/mozilla/pdf.js/blob/d64f223d034ad74fb62571c3acff566d25eca413/web/annotation_layer_builder.css
-const annotationLayerBuilderCSS = `
-/* Copyright 2014 Mozilla Foundation
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-:root {
-  --annotation-unfocused-field-background: url("data:image/svg+xml;charset=UTF-8,<svg width='1px' height='1px' xmlns='http://www.w3.org/2000/svg'><rect width='100%' height='100%' style='fill:rgba(0, 54, 255, 0.13);'/></svg>");
-  --input-focus-border-color: Highlight;
-  --input-focus-outline: 1px solid Canvas;
-  --input-unfocused-border-color: transparent;
-  --input-disabled-border-color: transparent;
-  --input-hover-border-color: black;
-  --link-outline: none;
-}
-
-@media screen and (forced-colors: active) {
-  :root {
-    --input-focus-border-color: CanvasText;
-    --input-unfocused-border-color: ActiveText;
-    --input-disabled-border-color: GrayText;
-    --input-hover-border-color: Highlight;
-    --link-outline: 1.5px solid LinkText;
-    --hcm-highlight-filter: invert(100%);
-  }
-  .annotationLayer .textWidgetAnnotation :is(input, textarea):required,
-  .annotationLayer .choiceWidgetAnnotation select:required,
-  .annotationLayer
-    .buttonWidgetAnnotation:is(.checkBox, .radioButton)
-    input:required {
-    outline: 1.5px solid selectedItem;
-  }
-
-  .annotationLayer .linkAnnotation:hover {
-    backdrop-filter: var(--hcm-highlight-filter);
-  }
-
-  .annotationLayer .linkAnnotation > a:hover {
-    opacity: 0 !important;
-    background: none !important;
-    box-shadow: none;
-  }
-
-  .annotationLayer .popupAnnotation .popup {
-    outline: calc(1.5px * var(--scale-factor)) solid CanvasText !important;
-    background-color: ButtonFace !important;
-    color: ButtonText !important;
-  }
-
-  .annotationLayer .highlightArea:hover::after {
-    position: absolute;
-    top: 0;
-    left: 0;
-    width: 100%;
-    height: 100%;
-    backdrop-filter: var(--hcm-highlight-filter);
-    content: "";
-    pointer-events: none;
-  }
-
-  .annotationLayer .popupAnnotation.focused .popup {
-    outline: calc(3px * var(--scale-factor)) solid Highlight !important;
-  }
-}
-
-.annotationLayer {
-  position: absolute;
-  top: 0;
-  left: 0;
-  pointer-events: none;
-  transform-origin: 0 0;
-  z-index: 3;
-}
-
-.annotationLayer[data-main-rotation="90"] .norotate {
-  transform: rotate(270deg) translateX(-100%);
-}
-.annotationLayer[data-main-rotation="180"] .norotate {
-  transform: rotate(180deg) translate(-100%, -100%);
-}
-.annotationLayer[data-main-rotation="270"] .norotate {
-  transform: rotate(90deg) translateY(-100%);
-}
-
-.annotationLayer canvas {
-  position: absolute;
-  width: 100%;
-  height: 100%;
-  pointer-events: none;
-}
-
-.annotationLayer section {
-  position: absolute;
-  text-align: initial;
-  pointer-events: auto;
-  box-sizing: border-box;
-  transform-origin: 0 0;
-}
-
-.annotationLayer .linkAnnotation {
-  outline: var(--link-outline);
-}
-
-.annotationLayer :is(.linkAnnotation, .buttonWidgetAnnotation.pushButton) > a {
-  position: absolute;
-  font-size: 1em;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-}
-
-.annotationLayer
-  :is(.linkAnnotation, .buttonWidgetAnnotation.pushButton):not(.hasBorder)
-  > a:hover {
-  opacity: 0.2;
-  background-color: rgb(255 255 0);
-  box-shadow: 0 2px 10px rgb(255 255 0);
-}
-
-.annotationLayer .linkAnnotation.hasBorder:hover {
-  background-color: rgb(255 255 0 / 0.2);
-}
-
-.annotationLayer .hasBorder {
-  background-size: 100% 100%;
-}
-
-.annotationLayer .textAnnotation img {
-  position: absolute;
-  cursor: pointer;
-  width: 100%;
-  height: 100%;
-  top: 0;
-  left: 0;
-}
-
-.annotationLayer .textWidgetAnnotation :is(input, textarea),
-.annotationLayer .choiceWidgetAnnotation select,
-.annotationLayer .buttonWidgetAnnotation:is(.checkBox, .radioButton) input {
-  background-image: var(--annotation-unfocused-field-background);
-  border: 2px solid var(--input-unfocused-border-color);
-  box-sizing: border-box;
-  font: calc(9px * var(--scale-factor)) sans-serif;
-  height: 100%;
-  margin: 0;
-  vertical-align: top;
-  width: 100%;
-}
-
-.annotationLayer .textWidgetAnnotation :is(input, textarea):required,
-.annotationLayer .choiceWidgetAnnotation select:required,
-.annotationLayer
-  .buttonWidgetAnnotation:is(.checkBox, .radioButton)
-  input:required {
-  outline: 1.5px solid red;
-}
-
-.annotationLayer .choiceWidgetAnnotation select option {
-  padding: 0;
-}
-
-.annotationLayer .buttonWidgetAnnotation.radioButton input {
-  border-radius: 50%;
-}
-
-.annotationLayer .textWidgetAnnotation textarea {
-  resize: none;
-}
-
-.annotationLayer .textWidgetAnnotation :is(input, textarea)[disabled],
-.annotationLayer .choiceWidgetAnnotation select[disabled],
-.annotationLayer
-  .buttonWidgetAnnotation:is(.checkBox, .radioButton)
-  input[disabled] {
-  background: none;
-  border: 2px solid var(--input-disabled-border-color);
-  cursor: not-allowed;
-}
-
-.annotationLayer .textWidgetAnnotation :is(input, textarea):hover,
-.annotationLayer .choiceWidgetAnnotation select:hover,
-.annotationLayer
-  .buttonWidgetAnnotation:is(.checkBox, .radioButton)
-  input:hover {
-  border: 2px solid var(--input-hover-border-color);
-}
-.annotationLayer .textWidgetAnnotation :is(input, textarea):hover,
-.annotationLayer .choiceWidgetAnnotation select:hover,
-.annotationLayer .buttonWidgetAnnotation.checkBox input:hover {
-  border-radius: 2px;
-}
-
-.annotationLayer .textWidgetAnnotation :is(input, textarea):focus,
-.annotationLayer .choiceWidgetAnnotation select:focus {
-  background: none;
-  border: 2px solid var(--input-focus-border-color);
-  border-radius: 2px;
-  outline: var(--input-focus-outline);
-}
-
-.annotationLayer .buttonWidgetAnnotation:is(.checkBox, .radioButton) :focus {
-  background-image: none;
-  background-color: transparent;
-}
-
-.annotationLayer .buttonWidgetAnnotation.checkBox :focus {
-  border: 2px solid var(--input-focus-border-color);
-  border-radius: 2px;
-  outline: var(--input-focus-outline);
-}
-
-.annotationLayer .buttonWidgetAnnotation.radioButton :focus {
-  border: 2px solid var(--input-focus-border-color);
-  outline: var(--input-focus-outline);
-}
-
-.annotationLayer .buttonWidgetAnnotation.checkBox input:checked::before,
-.annotationLayer .buttonWidgetAnnotation.checkBox input:checked::after,
-.annotationLayer .buttonWidgetAnnotation.radioButton input:checked::before {
-  background-color: CanvasText;
-  content: "";
-  display: block;
-  position: absolute;
-}
-
-.annotationLayer .buttonWidgetAnnotation.checkBox input:checked::before,
-.annotationLayer .buttonWidgetAnnotation.checkBox input:checked::after {
-  height: 80%;
-  left: 45%;
-  width: 1px;
-}
-
-.annotationLayer .buttonWidgetAnnotation.checkBox input:checked::before {
-  transform: rotate(45deg);
-}
-
-.annotationLayer .buttonWidgetAnnotation.checkBox input:checked::after {
-  transform: rotate(-45deg);
-}
-
-.annotationLayer .buttonWidgetAnnotation.radioButton input:checked::before {
-  border-radius: 50%;
-  height: 50%;
-  left: 30%;
-  top: 20%;
-  width: 50%;
-}
-
-.annotationLayer .textWidgetAnnotation input.comb {
-  font-family: monospace;
-  padding-left: 2px;
-  padding-right: 0;
-}
-
-.annotationLayer .textWidgetAnnotation input.comb:focus {
-  /*
-   * Letter spacing is placed on the right side of each character. Hence, the
-   * letter spacing of the last character may be placed outside the visible
-   * area, causing horizontal scrolling. We avoid this by extending the width
-   * when the element has focus and revert this when it loses focus.
-   */
-  width: 103%;
-}
-
-.annotationLayer .buttonWidgetAnnotation:is(.checkBox, .radioButton) input {
-  appearance: none;
-}
-
-.annotationLayer .fileAttachmentAnnotation .popupTriggerArea {
-  height: 100%;
-  width: 100%;
-}
-
-.annotationLayer .popupAnnotation {
-  position: absolute;
-  font-size: calc(9px * var(--scale-factor));
-  pointer-events: none;
-  width: max-content;
-  max-width: 45%;
-  height: auto;
-}
-
-.annotationLayer .popup {
-  background-color: rgb(255 255 153);
-  box-shadow: 0 calc(2px * var(--scale-factor)) calc(5px * var(--scale-factor))
-    rgb(136 136 136);
-  border-radius: calc(2px * var(--scale-factor));
-  outline: 1.5px solid rgb(255 255 74);
-  padding: calc(6px * var(--scale-factor));
-  cursor: pointer;
-  font: message-box;
-  white-space: normal;
-  word-wrap: break-word;
-  pointer-events: auto;
-}
-
-.annotationLayer .popupAnnotation.focused .popup {
-  outline-width: 3px;
-}
-
-.annotationLayer .popup * {
-  font-size: calc(9px * var(--scale-factor));
-}
-
-.annotationLayer .popup > .header {
-  display: inline-block;
-}
-
-.annotationLayer .popup > .header h1 {
-  display: inline;
-}
-
-.annotationLayer .popup > .header .popupDate {
-  display: inline-block;
-  margin-left: calc(5px * var(--scale-factor));
-  width: fit-content;
-}
-
-.annotationLayer .popupContent {
-  border-top: 1px solid rgb(51 51 51);
-  margin-top: calc(2px * var(--scale-factor));
-  padding-top: calc(2px * var(--scale-factor));
-}
-
-.annotationLayer .richText > * {
-  white-space: pre-wrap;
-  font-size: calc(9px * var(--scale-factor));
-}
-
-.annotationLayer .popupTriggerArea {
-  cursor: pointer;
-}
-
-.annotationLayer section svg {
-  position: absolute;
-  width: 100%;
-  height: 100%;
-  top: 0;
-  left: 0;
-}
-
-.annotationLayer .annotationTextContent {
-  position: absolute;
-  width: 100%;
-  height: 100%;
-  opacity: 0;
-  color: transparent;
-  user-select: none;
-  pointer-events: none;
-}
-
-.annotationLayer .annotationTextContent span {
-  width: 100%;
-  display: inline-block;
-}
-
-.annotationLayer svg.quadrilateralsContainer {
-  contain: strict;
-  width: 0;
-  height: 0;
-  position: absolute;
-  top: 0;
-  left: 0;
-  z-index: -1;
-}
-`
-
-const renderPage = async (page, getImageBlob) => {
-
-    const naturalPdfSize = page.getViewport({ scale: 1 })
-    const naturalPdfRatio = naturalPdfSize.width / naturalPdfSize.height
-    const appRatio = innerWidth / innerHeight
-    const pdfToAppResolutionRatio = appRatio / naturalPdfRatio
-
-    const scale = devicePixelRatio * pdfToAppResolutionRatio
     const viewport = page.getViewport({ scale })
 
+    // for some reason must use `document`'s canvas
+    // using a canvas in `doc` results in tofu
     const canvas = document.createElement('canvas')
     canvas.height = viewport.height
     canvas.width = viewport.width
     const canvasContext = canvas.getContext('2d')
     await page.render({ canvasContext, viewport }).promise
-    const blob = await new Promise(resolve => canvas.toBlob(resolve))
+    doc.querySelector('#canvas').replaceChildren(doc.adoptNode(canvas))
-    if (getImageBlob) return blob
 
-    /*
+    const container = doc.querySelector('.textLayer')
-    // with the SVG backend
+    const textLayer = new pdfjsLib.TextLayer({
-    const operatorList = await page.getOperatorList()
+        textContentSource: await page.streamTextContent(),
-    const svgGraphics = new pdfjsLib.SVGGraphics(page.commonObjs, page.objs)
-    const svg = await svgGraphics.getSVG(operatorList, viewport)
-    const str = new XMLSerializer().serializeToString(svg)
-    const blob = new Blob([str], { type: 'image/svg+xml' })
-    */
-
-    const container = document.createElement('div')
-    container.classList.add('textLayer')
-    await pdfjsLib.renderTextLayer({
-        textContentSource: await page.getTextContent(),
         container, viewport,
-    }).promise
+    })
+    await textLayer.render()
 
-    const div = document.createElement('div')
+    // hide "offscreen" canvases appended to docuemnt when rendering text layer
-    div.classList.add('annotationLayer')
+    // https://github.com/mozilla/pdf.js/blob/642b9a5ae67ef642b9a8808fd9efd447e8c350e2/web/pdf_viewer.css#L51-L58
+    for (const canvas of document.querySelectorAll('.hiddenCanvasElement'))
+        Object.assign(canvas.style, {
+            position: 'absolute',
+            top: '0',
+            left: '0',
+            width: '0',
+            height: '0',
+            display: 'none',
+        })
+
+    const div = doc.querySelector('.annotationLayer')
     await new pdfjsLib.AnnotationLayer({ page, viewport, div }).render({
         annotations: await page.getAnnotations(),
         linkService: {
@@ -536,15 +55,24 @@ const renderPage = async (page, getImageBlob) => {
             addLinkAttributes: (link, url) => link.href = url,
         },
     })
+}
 
-    const src = URL.createObjectURL(blob)
+const renderPage = async (page, getImageBlob) => {
-    const url = URL.createObjectURL(new Blob([`
+    const viewport = page.getViewport({ scale: 1 })
-        <!DOCTYPE html>
+    if (getImageBlob) {
-        <meta charset="utf-8">
+        const canvas = document.createElement('canvas')
-        <style>
+        canvas.height = viewport.height
-        :root {
+        canvas.width = viewport.width
-            --scale-factor: ${scale};
+        const canvasContext = canvas.getContext('2d')
+        await page.render({ canvasContext, viewport }).promise
+        return new Promise(resolve => canvas.toBlob(resolve))
     }
+    const src = URL.createObjectURL(new Blob([`
+        <!DOCTYPE html>
+        <html lang="en">
+        <meta charset="utf-8">
+        <meta name="viewport" content="width=${viewport.width}, height=${viewport.height}">
+        <style>
         html, body {
             margin: 0;
             padding: 0;
@@ -552,11 +80,12 @@ const renderPage = async (page, getImageBlob) => {
         ${textLayerBuilderCSS}
         ${annotationLayerBuilderCSS}
         </style>
-        <img src="${src}">
+        <div id="canvas"></div>
-        ${container.outerHTML}
+        <div class="textLayer"></div>
-        ${div.outerHTML}
+        <div class="annotationLayer"></div>
     `], { type: 'text/html' }))
-    return url
+    const onZoom = ({ doc, scale }) => render(page, doc, scale)
+    return { src, onZoom }
 }
 
 const makeTOCItem = item => ({
@@ -592,7 +121,6 @@ export const makePDF = async file => {
         },
         size: 1000,
     }))
-    book.sections[0].pageSpread = 'right'
     book.isExternal = uri => /^\w+:/i.test(uri)
     book.resolveHref = async href => {
         const parsed = JSON.parse(href)
@@ -610,5 +138,6 @@ export const makePDF = async file => {
     }
     book.getTOCFragment = doc => doc.documentElement
     book.getCover = async () => renderPage(await pdf.getPage(1), true)
+    book.destroy = () => pdf.destroy()
     return book
 }

reader.html

@@ -301,5 +301,4 @@ body {
         </svg>
     </button>
 </div>
-<script src="vendor/pdfjs/pdf.js"></script>
 <script src="reader.js" type="module"></script>

vendor/pdfjs/annotation_layer_builder.css

@@ -0,0 +1,389 @@
+/* Copyright 2014 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.annotationLayer {
+  --annotation-unfocused-field-background: url("data:image/svg+xml;charset=UTF-8,<svg width='1px' height='1px' xmlns='http://www.w3.org/2000/svg'><rect width='100%' height='100%' style='fill:rgba(0, 54, 255, 0.13);'/></svg>");
+  --input-focus-border-color: Highlight;
+  --input-focus-outline: 1px solid Canvas;
+  --input-unfocused-border-color: transparent;
+  --input-disabled-border-color: transparent;
+  --input-hover-border-color: black;
+  --link-outline: none;
+
+  @media screen and (forced-colors: active) {
+    --input-focus-border-color: CanvasText;
+    --input-unfocused-border-color: ActiveText;
+    --input-disabled-border-color: GrayText;
+    --input-hover-border-color: Highlight;
+    --link-outline: 1.5px solid LinkText;
+
+    .textWidgetAnnotation :is(input, textarea):required,
+    .choiceWidgetAnnotation select:required,
+    .buttonWidgetAnnotation:is(.checkBox, .radioButton) input:required {
+      outline: 1.5px solid selectedItem;
+    }
+
+    .linkAnnotation {
+      outline: var(--link-outline);
+
+      &:hover {
+        backdrop-filter: var(--hcm-highlight-filter);
+      }
+
+      & > a:hover {
+        opacity: 0 !important;
+        background: none !important;
+        box-shadow: none;
+      }
+    }
+
+    .popupAnnotation .popup {
+      outline: calc(1.5px * var(--scale-factor)) solid CanvasText !important;
+      background-color: ButtonFace !important;
+      color: ButtonText !important;
+    }
+
+    .highlightArea:hover::after {
+      position: absolute;
+      top: 0;
+      left: 0;
+      width: 100%;
+      height: 100%;
+      backdrop-filter: var(--hcm-highlight-filter);
+      content: "";
+      pointer-events: none;
+    }
+
+    .popupAnnotation.focused .popup {
+      outline: calc(3px * var(--scale-factor)) solid Highlight !important;
+    }
+  }
+
+  position: absolute;
+  top: 0;
+  left: 0;
+  pointer-events: none;
+  transform-origin: 0 0;
+
+  &[data-main-rotation="90"] .norotate {
+    transform: rotate(270deg) translateX(-100%);
+  }
+  &[data-main-rotation="180"] .norotate {
+    transform: rotate(180deg) translate(-100%, -100%);
+  }
+  &[data-main-rotation="270"] .norotate {
+    transform: rotate(90deg) translateY(-100%);
+  }
+
+  &.disabled {
+    section,
+    .popup {
+      pointer-events: none;
+    }
+  }
+
+  .annotationContent {
+    position: absolute;
+    width: 100%;
+    height: 100%;
+    pointer-events: none;
+
+    &.freetext {
+      background: transparent;
+      border: none;
+      inset: 0;
+      overflow: visible;
+      white-space: nowrap;
+      font: 10px sans-serif;
+      line-height: 1.35;
+      user-select: none;
+    }
+  }
+
+  section {
+    position: absolute;
+    text-align: initial;
+    pointer-events: auto;
+    box-sizing: border-box;
+    transform-origin: 0 0;
+
+    &:has(div.annotationContent) {
+      canvas.annotationContent {
+        display: none;
+      }
+    }
+  }
+
+  .textLayer.selecting ~ & section {
+    pointer-events: none;
+  }
+
+  :is(.linkAnnotation, .buttonWidgetAnnotation.pushButton) > a {
+    position: absolute;
+    font-size: 1em;
+    top: 0;
+    left: 0;
+    width: 100%;
+    height: 100%;
+  }
+
+  :is(.linkAnnotation, .buttonWidgetAnnotation.pushButton):not(.hasBorder)
+    > a:hover {
+    opacity: 0.2;
+    background-color: rgb(255 255 0);
+    box-shadow: 0 2px 10px rgb(255 255 0);
+  }
+
+  .linkAnnotation.hasBorder:hover {
+    background-color: rgb(255 255 0 / 0.2);
+  }
+
+  .hasBorder {
+    background-size: 100% 100%;
+  }
+
+  .textAnnotation img {
+    position: absolute;
+    cursor: pointer;
+    width: 100%;
+    height: 100%;
+    top: 0;
+    left: 0;
+  }
+
+  .textWidgetAnnotation :is(input, textarea),
+  .choiceWidgetAnnotation select,
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) input {
+    background-image: var(--annotation-unfocused-field-background);
+    border: 2px solid var(--input-unfocused-border-color);
+    box-sizing: border-box;
+    font: calc(9px * var(--scale-factor)) sans-serif;
+    height: 100%;
+    margin: 0;
+    vertical-align: top;
+    width: 100%;
+  }
+
+  .textWidgetAnnotation :is(input, textarea):required,
+  .choiceWidgetAnnotation select:required,
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) input:required {
+    outline: 1.5px solid red;
+  }
+
+  .choiceWidgetAnnotation select option {
+    padding: 0;
+  }
+
+  .buttonWidgetAnnotation.radioButton input {
+    border-radius: 50%;
+  }
+
+  .textWidgetAnnotation textarea {
+    resize: none;
+  }
+
+  .textWidgetAnnotation :is(input, textarea)[disabled],
+  .choiceWidgetAnnotation select[disabled],
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) input[disabled] {
+    background: none;
+    border: 2px solid var(--input-disabled-border-color);
+    cursor: not-allowed;
+  }
+
+  .textWidgetAnnotation :is(input, textarea):hover,
+  .choiceWidgetAnnotation select:hover,
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) input:hover {
+    border: 2px solid var(--input-hover-border-color);
+  }
+  .textWidgetAnnotation :is(input, textarea):hover,
+  .choiceWidgetAnnotation select:hover,
+  .buttonWidgetAnnotation.checkBox input:hover {
+    border-radius: 2px;
+  }
+
+  .textWidgetAnnotation :is(input, textarea):focus,
+  .choiceWidgetAnnotation select:focus {
+    background: none;
+    border: 2px solid var(--input-focus-border-color);
+    border-radius: 2px;
+    outline: var(--input-focus-outline);
+  }
+
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) :focus {
+    background-image: none;
+    background-color: transparent;
+  }
+
+  .buttonWidgetAnnotation.checkBox :focus {
+    border: 2px solid var(--input-focus-border-color);
+    border-radius: 2px;
+    outline: var(--input-focus-outline);
+  }
+
+  .buttonWidgetAnnotation.radioButton :focus {
+    border: 2px solid var(--input-focus-border-color);
+    outline: var(--input-focus-outline);
+  }
+
+  .buttonWidgetAnnotation.checkBox input:checked::before,
+  .buttonWidgetAnnotation.checkBox input:checked::after,
+  .buttonWidgetAnnotation.radioButton input:checked::before {
+    background-color: CanvasText;
+    content: "";
+    display: block;
+    position: absolute;
+  }
+
+  .buttonWidgetAnnotation.checkBox input:checked::before,
+  .buttonWidgetAnnotation.checkBox input:checked::after {
+    height: 80%;
+    left: 45%;
+    width: 1px;
+  }
+
+  .buttonWidgetAnnotation.checkBox input:checked::before {
+    transform: rotate(45deg);
+  }
+
+  .buttonWidgetAnnotation.checkBox input:checked::after {
+    transform: rotate(-45deg);
+  }
+
+  .buttonWidgetAnnotation.radioButton input:checked::before {
+    border-radius: 50%;
+    height: 50%;
+    left: 25%;
+    top: 25%;
+    width: 50%;
+  }
+
+  .textWidgetAnnotation input.comb {
+    font-family: monospace;
+    padding-left: 2px;
+    padding-right: 0;
+  }
+
+  .textWidgetAnnotation input.comb:focus {
+    /*
+     * Letter spacing is placed on the right side of each character. Hence, the
+     * letter spacing of the last character may be placed outside the visible
+     * area, causing horizontal scrolling. We avoid this by extending the width
+     * when the element has focus and revert this when it loses focus.
+     */
+    width: 103%;
+  }
+
+  .buttonWidgetAnnotation:is(.checkBox, .radioButton) input {
+    appearance: none;
+  }
+
+  .fileAttachmentAnnotation .popupTriggerArea {
+    height: 100%;
+    width: 100%;
+  }
+
+  .popupAnnotation {
+    position: absolute;
+    font-size: calc(9px * var(--scale-factor));
+    pointer-events: none;
+    width: max-content;
+    max-width: 45%;
+    height: auto;
+  }
+
+  .popup {
+    background-color: rgb(255 255 153);
+    box-shadow: 0 calc(2px * var(--scale-factor))
+      calc(5px * var(--scale-factor)) rgb(136 136 136);
+    border-radius: calc(2px * var(--scale-factor));
+    outline: 1.5px solid rgb(255 255 74);
+    padding: calc(6px * var(--scale-factor));
+    cursor: pointer;
+    font: message-box;
+    white-space: normal;
+    word-wrap: break-word;
+    pointer-events: auto;
+  }
+
+  .popupAnnotation.focused .popup {
+    outline-width: 3px;
+  }
+
+  .popup * {
+    font-size: calc(9px * var(--scale-factor));
+  }
+
+  .popup > .header {
+    display: inline-block;
+  }
+
+  .popup > .header h1 {
+    display: inline;
+  }
+
+  .popup > .header .popupDate {
+    display: inline-block;
+    margin-left: calc(5px * var(--scale-factor));
+    width: fit-content;
+  }
+
+  .popupContent {
+    border-top: 1px solid rgb(51 51 51);
+    margin-top: calc(2px * var(--scale-factor));
+    padding-top: calc(2px * var(--scale-factor));
+  }
+
+  .richText > * {
+    white-space: pre-wrap;
+    font-size: calc(9px * var(--scale-factor));
+  }
+
+  .popupTriggerArea {
+    cursor: pointer;
+  }
+
+  section svg {
+    position: absolute;
+    width: 100%;
+    height: 100%;
+    top: 0;
+    left: 0;
+  }
+
+  .annotationTextContent {
+    position: absolute;
+    width: 100%;
+    height: 100%;
+    opacity: 0;
+    color: transparent;
+    user-select: none;
+    pointer-events: none;
+
+    span {
+      width: 100%;
+      display: inline-block;
+    }
+  }
+
+  svg.quadrilateralsContainer {
+    contain: strict;
+    width: 0;
+    height: 0;
+    position: absolute;
+    top: 0;
+    left: 0;
+    z-index: -1;
+  }
+}

vendor/pdfjs/text_layer_builder.css

@@ -0,0 +1,131 @@
+/* Copyright 2014 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.textLayer {
+  position: absolute;
+  text-align: initial;
+  inset: 0;
+  overflow: clip;
+  opacity: 1;
+  line-height: 1;
+  text-size-adjust: none;
+  forced-color-adjust: none;
+  transform-origin: 0 0;
+  caret-color: CanvasText;
+  z-index: 0;
+
+  &.highlighting {
+    touch-action: none;
+  }
+
+  :is(span, br) {
+    color: transparent;
+    position: absolute;
+    white-space: pre;
+    cursor: text;
+    transform-origin: 0% 0%;
+  }
+
+  > :not(.markedContent),
+  .markedContent span:not(.markedContent) {
+    z-index: 1;
+  }
+
+  /* Only necessary in Google Chrome, see issue 14205, and most unfortunately
+   * the problem doesn't show up in "text" reference tests. */
+  /*#if !MOZCENTRAL*/
+  span.markedContent {
+    top: 0;
+    height: 0;
+  }
+  /*#endif*/
+
+  span[role="img"] {
+    user-select: none;
+    cursor: default;
+  }
+
+  .highlight {
+    --highlight-bg-color: rgb(180 0 170 / 0.25);
+    --highlight-selected-bg-color: rgb(0 100 0 / 0.25);
+    --highlight-backdrop-filter: none;
+    --highlight-selected-backdrop-filter: none;
+
+    @media screen and (forced-colors: active) {
+      --highlight-bg-color: transparent;
+      --highlight-selected-bg-color: transparent;
+      --highlight-backdrop-filter: var(--hcm-highlight-filter);
+      --highlight-selected-backdrop-filter: var(
+        --hcm-highlight-selected-filter
+      );
+    }
+
+    margin: -1px;
+    padding: 1px;
+    background-color: var(--highlight-bg-color);
+    backdrop-filter: var(--highlight-backdrop-filter);
+    border-radius: 4px;
+
+    &.appended {
+      position: initial;
+    }
+
+    &.begin {
+      border-radius: 4px 0 0 4px;
+    }
+
+    &.end {
+      border-radius: 0 4px 4px 0;
+    }
+
+    &.middle {
+      border-radius: 0;
+    }
+
+    &.selected {
+      background-color: var(--highlight-selected-bg-color);
+      backdrop-filter: var(--highlight-selected-backdrop-filter);
+    }
+  }
+
+  ::selection {
+    /* stylelint-disable declaration-block-no-duplicate-properties */
+    /*#if !MOZCENTRAL*/
+    background: rgba(0 0 255 / 0.25);
+    /*#endif*/
+    /* stylelint-enable declaration-block-no-duplicate-properties */
+    background: color-mix(in srgb, AccentColor, transparent 75%);
+  }
+
+  /* Avoids https://github.com/mozilla/pdf.js/issues/13840 in Chrome */
+  /*#if !MOZCENTRAL*/
+  br::selection {
+    background: transparent;
+  }
+  /*#endif*/
+
+  .endOfContent {
+    display: block;
+    position: absolute;
+    inset: 100% 0 0;
+    z-index: 0;
+    cursor: default;
+    user-select: none;
+  }
+
+  &.selecting .endOfContent {
+    top: 0;
+  }
+}

view.js

@@ -175,6 +175,7 @@ export class View extends HTMLElement {
     close() {
         this.renderer?.destroy()
         this.renderer?.remove()
+        this.book?.destroy?.()
         this.#sectionProgress = null
         this.#tocProgress = null
         this.#pageProgress = null