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KF8: fix embedded images in SVG

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John Factotum
2023-09-11 12:53:09 +08:00
parent 83e709f575
commit ab6048411a
1 changed files with 23 additions and 12 deletions
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mobi.js
+23 -12
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@@ -884,6 +884,7 @@ const replaceSeries = async (str, regex, f) => {
class KF8 {
parser = new DOMParser()
serializer = new XMLSerializer()
#cache = new Map()
#fragmentOffsets = new Map()
#fragmentSelectors = new Map()
@@ -894,8 +895,8 @@ class KF8 {
#rawTail = new Uint8Array()
#lastLoadedHead = -1
#lastLoadedTail = -1
#checkType = true
#type = MIME.XHTML
#inlineMap = new Map()
constructor(mobi) {
this.mobi = mobi
}
@@ -1029,12 +1030,18 @@ class KF8 {
: await this.mobi.loadResource(id - 1)
const result = [MIME.XHTML, MIME.HTML, MIME.CSS, MIME.SVG].includes(type)
? await this.replaceResources(this.mobi.decode(raw)) : raw
return new Blob([result], { type })
const doc = type === MIME.SVG ? this.parser.parseFromString(result, type) : null
return [new Blob([result], { type }),
// SVG wrappers need to be inlined
// as browsers don't allow external resources when loading SVG as an image
doc?.getElementsByTagNameNS('http://www.w3.org/2000/svg', 'image')?.length
? doc.documentElement : null]
}
async loadResource(str) {
if (this.#cache.has(str)) return this.#cache.get(str)
const blob = await this.loadResourceBlob(str)
const url = URL.createObjectURL(blob)
const [blob, inline] = await this.loadResourceBlob(str)
const url = inline ? str : URL.createObjectURL(blob)
if (inline) this.#inlineMap.set(url, inline)
this.#cache.set(str, url)
return url
}
@@ -1102,16 +1109,20 @@ class KF8 {
async loadSection(section) {
if (this.#cache.has(section)) return this.#cache.get(section)
const str = await this.loadText(section)
const replaced = await this.replaceResources(str)
// by default, type is XHTML; change to HTML if it's not valid XHTML
if (this.#checkType && this.parser
.parseFromString(str, this.#type)
.querySelector('parsererror')) this.#type = MIME.HTML
// let's just check it once for now
if (this.#checkType) this.#checkType = false
const replaced = await this.replaceResources(str)
const url = URL.createObjectURL(new Blob([replaced], { type: this.#type }))
let doc = this.parser.parseFromString(replaced, this.#type)
if (doc.querySelector('parsererror')) {
this.#type = MIME.HTML
doc = this.parser.parseFromString(replaced, this.#type)
}
for (const [url, node] of this.#inlineMap) {
for (const el of doc.querySelectorAll(`img[src="${url}"]`))
el.replaceWith(node)
}
const url = URL.createObjectURL(
new Blob([this.serializer.serializeToString(doc)], { type: this.#type }))
this.#cache.set(section, url)
return url
}