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content.js
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Content = {
/*******************/
/* Content caching.
*/
cachedContent: { },
contentCacheKeyForLink: (link) => {
return ( Content.contentTypeForLink(link)?.contentCacheKeyForLink?.(link)
?? (Content.sourceURLsForLink(link)?.first ?? link).href);
},
cacheContentForLink: (content, link) => {
Content.cachedContent[Content.contentCacheKeyForLink(link)] = content;
},
cachedContentForLink: (link) => {
// Special case for the link being to the current page.
if ( link.pathname == location.pathname
&& Content.cachedContent[Content.contentCacheKeyForLink(link)] == null)
Content.load(link);
return Content.cachedContent[Content.contentCacheKeyForLink(link)];
},
cachedDocumentForLink: (link) => {
let content = Content.cachedContentForLink(link);
return (content && content != "LOADING_FAILED"
? content.document
: null);
},
cachedDataExists: (link) => {
let cachedContent = Content.cachedContentForLink(link);
return ( cachedContent != null
&& cachedContent != "LOADING_FAILED");
},
updateCachedContent: (link, updateFunction) => {
if (Content.cachedDataExists(link) == false)
return;
let content = Content.cachedContentForLink(link);
switch (Content.contentTypeForLink(link)) {
case Content.contentTypes.localPage:
updateFunction(content.document);
break;
default:
break;
}
},
/*******************/
/* Content loading.
*/
sourceURLsForLink: (link) => {
return Content.contentTypeForLink(link)?.sourceURLsForLink?.(link);
},
waitForDataLoad: (link, loadHandler = null, loadFailHandler = null) => {
if (Content.cachedContentForLink(link) == "LOADING_FAILED") {
if (loadFailHandler)
loadFailHandler(link);
return;
} else if (Content.cachedContentForLink(link)) {
if (loadHandler)
loadHandler(link);
return;
}
let didLoadHandler = (info) => {
if (loadHandler)
loadHandler(link);
GW.notificationCenter.removeHandlerForEvent("Content.contentLoadDidFail", loadDidFailHandler);
};
let loadDidFailHandler = (info) => {
if (loadFailHandler)
loadFailHandler(link);
GW.notificationCenter.removeHandlerForEvent("Content.contentDidLoad", didLoadHandler);
};
let options = {
once: true,
condition: (info) => (info.link == link)
};
GW.notificationCenter.addHandlerForEvent("Content.contentDidLoad", didLoadHandler, options);
GW.notificationCenter.addHandlerForEvent("Content.contentLoadDidFail", loadDidFailHandler, options);
},
load: (link, loadHandler = null, loadFailHandler = null, sourceURLsRemaining = null) => {
GWLog("Content.load", "content.js", 2);
sourceURLsRemaining = sourceURLsRemaining ?? Content.sourceURLsForLink(link);
let sourceURL = sourceURLsRemaining?.shift();
let processResponse = (response) => {
let content = Content.contentFromLink?.(link) ?? Content.contentFromResponse?.(response, link, sourceURL);
if (content?.document) {
Content.cacheContentForLink(content, link);
GW.notificationCenter.fireEvent("Content.contentDidLoad", {
link: link
});
} else if (content?.loadURLs) {
sourceURLsRemaining = sourceURLsRemaining ?? [ ];
sourceURLsRemaining.unshift(...(content.loadURLs));
Content.load(link, null, null, sourceURLsRemaining);
return;
} else {
Content.cacheContentForLink("LOADING_FAILED", link);
GW.notificationCenter.fireEvent("Content.contentLoadDidFail", {
link: link
});
// Send request to record failure in server logs.
GWServerLogError(link.href + `--could-not-process`, "problematic content");
}
};
if ( sourceURL == null
|| sourceURL.pathname == location.pathname) {
processResponse();
} else {
doAjax({
location: sourceURL.href,
onSuccess: (event) => {
let permittedContentTypes = Content.contentTypeForLink(link).permittedContentTypes;
let httpContentType = event.target.getResponseHeader("Content-Type")?.match(/(.+?)(?:;|$)/)[1];
if (permittedContentTypes?.includes(httpContentType) == false) {
// Send request to record failure in server logs.
GWServerLogError(link.href + `--bad-content-type` + `--${httpContentType}`, "bad content type");
return;
}
processResponse(event.target.responseText);
},
onFailure: (event) => {
if (sourceURLsRemaining.length > 0) {
Content.load(link, null, null, sourceURLsRemaining);
return;
}
Content.cacheContentForLink("LOADING_FAILED", link);
GW.notificationCenter.fireEvent("Content.contentLoadDidFail", {
link: link
});
// Send request to record failure in server logs.
GWServerLogError(link.href + `--missing-content` + `--${event.target.status}`, "missing content");
},
headers: Content.contentTypeForLink(link).additionalAPIRequestHeaders
});
}
// Call any provided handlers, if/when appropriate.
if (loadHandler || loadFailHandler)
Content.waitForDataLoad(link, loadHandler, loadFailHandler);
},
contentFromLink: (link) => {
return Content.contentTypeForLink(link)?.contentFromLink?.(link);
},
contentFromResponse: (response, link, sourceURL) => {
return Content.contentTypeForLink(link)?.contentFromResponse?.(response, link, sourceURL);
},
/**************************************/
/* Reference data retrieval & caching.
*/
cachedReferenceData: { },
referenceDataCacheKeyForLink: (link) => {
return (Content.contentTypeForLink(link)?.referenceDataCacheKeyForLink?.(link) ?? null);
},
cachedReferenceDataForLink: (link) => {
let cacheKey = Content.referenceDataCacheKeyForLink(link);
if (cacheKey)
return Content.cachedReferenceData[cacheKey];
return null;
},
cacheReferenceDataForLink: (referenceData, link) => {
let cacheKey = Content.referenceDataCacheKeyForLink(link);
if (cacheKey)
Content.cachedReferenceData[cacheKey] = referenceData;
},
referenceDataForLink: (link) => {
let content = Content.cachedContentForLink(link);
if ( content == null
|| content == "LOADING_FAILED") {
return content;
} else {
let referenceData = Content.cachedReferenceDataForLink(link);
if (referenceData == null) {
referenceData = Content.referenceDataFromContent(content, link);
Content.cacheReferenceDataForLink(referenceData, link);
}
return referenceData;
}
},
referenceDataFromContent: (content, link) => {
let contentType = Content.contentTypeForLink(link);
return (contentType.referenceDataFromContent
? contentType.referenceDataFromContent(content, link)
: { content: content.document });
},
/***********/
/* Helpers.
*/
isContentTransformLink: (link) => {
return ([ "tweet",
"wikipediaEntry",
"githubIssue"
].findIndex(x => Content.contentTypes[x].matches(link)) !== -1);
},
shouldLocalizeContentFromLink: (link) => {
return Content.referenceDataForLink(link)?.shouldLocalize ?? false;
},
objectHTMLForURL: (url, options) => {
options = Object.assign({
additionalClasses: null,
additionalAttributes: null
}, options);
if (typeof url == "string")
url = URLFromString(url);
/* PDF optional settings to embed more cleanly: fit width, and disable
‘bookmarks’ & ‘thumbnails’ (just not enough space).
<https://gwern.net/doc/cs/css/2007-adobe-parametersforopeningpdffiles.pdf#page=6>
<https://github.com/mozilla/pdf.js/wiki/Viewer-options>
WARNING: browsers are unreliable in whether they properly apply
these options; Firefox appears to, but not Chrome, and there can be
iframe issues as well.
*/
let src = url.pathname.endsWith(".pdf")
? url.href + (url.hash ? "&" : "#") + "view=FitH&pagemode=none"
: url.href;
let cssClass = [ "loaded-not" ];
if (url.pathname.endsWith(".pdf"))
cssClass.push("pdf");
if (options.additionalClasses)
cssClass.push(options.additionalClasses);
cssClass = cssClass.join(" ");
return `<iframe
src="${src}"
frameborder="0"
class="${cssClass}"
${(options.additionalAttributes ?? "")}
></iframe>`;
},
figcaptionHTMLForMediaLink: (link) => {
let captionHTML = ``;
if (Annotations.isAnnotatedLink(link))
captionHTML = "<figcaption>" + synthesizeIncludeLink(link, {
"class": "include-annotation include-strict",
"data-include-selector": ".annotation-abstract > *",
"data-include-selector-not": ".aux-links-append",
"data-include-template": "annotation-blockquote-not"
}).outerHTML + "</figcaption>";
return captionHTML;
},
mediaDimensionsHTMLForMediaLink: (link) => {
let parts = [ ];
if (link.dataset.aspectRatio)
parts.push(`data-aspect-ratio="${(link.dataset.aspectRatio)}"`);
if (link.dataset.imageWidth)
parts.push(`width="${(link.dataset.imageWidth)}"`);
if (link.dataset.imageHeight)
parts.push(`height="${(link.dataset.imageHeight)}"`);
return parts.join(" ");
},
removeExtraneousClassesFromMediaElement: (media) => {
// Remove various link classes.
media.classList.remove("icon-not", "link-page", "link-live",
"link-annotated", "link-annotated-partial", "link-annotated-not",
"has-annotation", "has-annotation-partial", "has-content",
"has-icon", "has-indicator-hook", "spawns-popup", "spawns-popin");
// Remove all `include-` classes.
media.classList.remove(...(Array.from(media.classList).filter(x => x.startsWith("include-"))));
},
/**************************************************************/
/* CONTENT TYPES
Each content type definition has the following REQUIRED members:
.matches(URL|Element) => boolean
.isSliceable: boolean
This property determines whether content documents returned for
links of this content type may be “sliced”, via element IDs,
selectors, or by other means. If its value is false, then the
returned content documents may only be transcluded in their
entirety.
... plus either these two:
.sourceURLsForLink(URL|Element) => [ URL ]
.contentFromResponse(string, URL|Element, URL) => object
... or this one:
.contentFromLink(URL|Element) => object
A content type definition may also have the following OPTIONAL members:
.contentCacheKeyForLink(URL|Element) => string
If this member function is not present, a default content cache
key (based on the first source URL for the link, or else the URL
of the link itself) will be used.
.referenceDataFromContent(object, URL|Element) => object
NOTE: If this member function is not present, we must ensure
that the object returned from .contentFromResponse() or
.contentFromLink() has a .document member. (This should be a
DocumentFragment object which contains the primary content for
the link.)
.referenceDataCacheKeyForLink(URL|Element) => string
NOTE: If this member function is not present, then reference
data will not be cached for links of this content type.
*/
contentTypeForLink: (link) => {
if (link.dataset.linkContentType) {
let contentTypeName = link.dataset.linkContentType.replace(/([a-z])-([a-z])/g, (match, p1, p2) => (p1 + p2.toUpperCase()));
let contentType = Content.contentTypes[contentTypeName];
if (contentType?.matches(link))
return contentType;
}
for (let [ contentTypeName, contentType ] of Object.entries(Content.contentTypes))
if (contentType.matches(link))
return contentType;
return null;
},
contentTypes: {
dropcapInfo: {
matches: (link) => {
return link.classList.contains("link-dropcap");
},
isSliceable: false,
contentFromLink: (link) => {
let letter = link.dataset.letter;
let dropcapType = link.dataset.dropcapType;
let contentDocument = newDocument(
`<p>A capital letter <strong>${letter}</strong> dropcap initial, from the `
+ `<a class="link-page" href="/dropcap#${dropcapType}"><strong>${dropcapType}</strong></a>`
+ ` dropcap font.</p>`
);
// Fire contentDidLoad event.
GW.notificationCenter.fireEvent("GW.contentDidLoad", {
source: "Content.contentTypes.dropcapInfo.load",
container: contentDocument,
document: contentDocument,
loadLocation: new URL(link.href)
});
return {
document: contentDocument
};
}
},
foreignSite: {
matches: (link) => {
// Some foreign-site links are handled specially.
if ([ "tweet",
"wikipediaEntry",
"githubIssue",
"remoteVideo",
"remoteImage"
].findIndex(x => Content.contentTypes[x].matches(link)) !== -1)
return false;
// Account for alternate and archive URLs.
let url = URLFromString(link.dataset.urlArchive ?? link.dataset.urlHtml ?? link.href);
return ( url.hostname != location.hostname
&& link.classList.contains("link-live"));
},
isSliceable: false,
contentFromLink: (link) => {
// WARNING: EXPERIMENTAL FEATURE!
// if (localStorage.getItem("enable-embed-proxy") == "true") {
// let url = URLFromString(embedSrc);
// let proxyURL = URLFromString("https://api.obormot.net/embed.php");
// doAjax({
// location: proxyURL.href,
// params: { url: url.href },
// onSuccess: (event) => {
// if (Extracts.popFrameProvider.isSpawned(target.popFrame) == false)
// return;
//
// let doc = newElement("DIV", null, { "innerHTML": event.target.responseText });
// doc.querySelectorAll("[href], [src]").forEach(element => {
// if (element.href) {
// let elementURL = URLFromString(element.href);
// if ( elementURL.host == location.host
// && !element.getAttribute("href").startsWith("#")) {
// elementURL.host = url.host;
// element.href = elementURL.href;
// }
// } else if (element.src) {
// let elementURL = URLFromString(element.src);
// if (elementURL.host == location.host) {
// elementURL.host = url.host;
// element.src = elementURL.href;
// }
// }
// });
//
// if (event.target.getResponseHeader("content-type").startsWith("text/plain"))
// doc.innerHTML = `<pre>${doc.innerHTML}</pre>`;
//
// target.popFrame.document.querySelector("iframe").srcdoc = doc.innerHTML;
//
// Extracts.postRefreshUpdatePopFrameForTarget(target, true);
// },
// onFailure: (event) => {
// if (Extracts.popFrameProvider.isSpawned(target.popFrame) == false)
// return;
//
// Extracts.postRefreshUpdatePopFrameForTarget(target, false);
// }
// });
//
// return newDocument(`<iframe frameborder="0" sandbox="allow-scripts allow-popups"></iframe>`);
// }
// END EXPERIMENTAL SECTION
let embedSrc = link.dataset.urlArchive ?? link.dataset.urlHtml ?? link.href;
let additionalAttributes = [ ];
// Determine sandbox settings.
additionalAttributes.push(Content.contentTypes.foreignSite.shouldEnableScriptsForURL(URLFromString(embedSrc))
? `sandbox="allow-scripts allow-same-origin"`
: `sandbox`);
let contentDocument = newDocument(Content.objectHTMLForURL(embedSrc, {
additionalAttributes: additionalAttributes.join(" ")
}));
return {
document: contentDocument
};
},
shouldEnableScriptsForURL: (url) => {
if (url.hostname == "docs.google.com")
return true;
if (url.hostname == "demos.obormot.net")
return true;
if ( url.hostname == "archive.org"
&& url.pathname.startsWith("/details/"))
return true;
return false;
}
},
wikipediaEntry: {
/* The Wikipedia API only gives usable responses for most, not all,
Wikipedia URLs.
*/
matches: (link) => {
return ( link.classList.contains("content-transform-not") == false
&& /(.+?)\.wikipedia\.org/.test(link.hostname)
&& link.pathname.startsWith("/wiki/")
&& link.pathname.startsWithAnyOf(_π("/wiki/", [ "File:", "Category:", "Special:", "Wikipedia:Wikipedia_Signpost" ])) == false);
},
isSliceable: false,
sourceURLsForLink: (link) => {
let apiRequestURL = URLFromString(link.href);
let wikiPageName = fixedEncodeURIComponent(/\/wiki\/(.+?)$/.exec(decodeURIComponent(apiRequestURL.pathname))[1]);
apiRequestURL.pathname = `/api/rest_v1/page/html/${wikiPageName}`;
apiRequestURL.hash = "";
return [ apiRequestURL ];
},
contentFromResponse: (response, link, sourceURL) => {
let contentDocument = newDocument(response);
let redirectLink = contentDocument.querySelector("link[rel='mw:PageProp/redirect']");
if (redirectLink) {
return {
loadURLs: Content.contentTypes.wikipediaEntry.sourceURLsForLink(modifiedURL(link, {
pathname: "/wiki" + redirectLink.getAttribute("href").slice(1)
}))
}
} else {
return {
document: contentDocument
};
}
},
referenceDataCacheKeyForLink: (link) => {
return link.href;
},
referenceDataFromContent: (wikipediaEntryContent, articleLink) => {
// Do not show the whole page, by default.
let wholePage = false;
// Show full page (sans TOC) if it’s a disambiguation page.
if (wikipediaEntryContent.document.querySelector("meta[property='mw:PageProp/disambiguation']") != null) {
wholePage = true;
// Send request to record failure in server logs.
GWServerLogError(Content.contentTypes.wikipediaEntry.sourceURLsForLink(articleLink).first.href + `--disambiguation-error`, "disambiguation page");
}
// Function to build table of contents for article or section.
let buildArticleTOC = (sections, baseArticle) => {
if ( sections == null
|| sections.length == 0)
return "";
let tocHTML = `<div class="TOC columns">`;
let headingLevel = 0;
for (let i = 0; i < sections.length; i++) {
let section = sections[i];
let headingElement = section.firstElementChild;
let newHeadingLevel = parseInt(headingElement.tagName.slice(1));
if (newHeadingLevel > headingLevel)
tocHTML += `<ul>`;
if ( i > 0
&& newHeadingLevel <= headingLevel)
tocHTML += `</li>`;
if (newHeadingLevel < headingLevel)
tocHTML += `</ul>`;
// Get heading, parse as HTML, and unwrap links.
let heading = headingElement.cloneNode(true);
heading.querySelectorAll("a").forEach(unwrap);
/* Construct TOC entry. (We must encode the heading
id, because the anchor might contain quotes.)
*/
let tocLinkHref = modifiedURL(articleLink, { hash: fixedEncodeURIComponent(headingElement.id) }).href;
tocHTML += `<li><a href="${tocLinkHref}">${(heading.innerHTML)}</a>`;
headingLevel = newHeadingLevel;
}
tocHTML += `</li></ul></div>`;
return tocHTML;
};
// Function to render a title link component link.
let renderTitleLinkHTML = (titleLinkHref, titleLinkInnerHTML, contentTransform = false) => {
// We use the mobile URL for popping up the live-link.
let titleLinkHrefForEmbedding = modifiedURL(URLFromString(titleLinkHref), {
hostname: articleLink.hostname.replace(".wikipedia.org", ".m.wikipedia.org")
}).href;
let titleLinkDataAttributes = `data-url-html="${titleLinkHrefForEmbedding}"`;
// Link icon.
let titleLinkIconMetadata = `data-link-icon-type="svg" data-link-icon="wikipedia"`;
// Transformed or live.
let titleLinkClass = `title-link ${(contentTransform ? "content-transform" : "link-live content-transform-not")}`;
// Template fill context.
let tfc = Transclude.standardTemplateFillContext;
return `<a
class="${titleLinkClass}"
title="Open ${titleLinkHref} in ${tfc.whichTab} ${tfc.tabOrWindow}"
href="${titleLinkHref}"
target="${tfc.linkTarget}>"
${titleLinkDataAttributes}
${titleLinkIconMetadata}
>${titleLinkInnerHTML}</a>`;
};
// Page title.
let pageTitleHTML = unescapeHTML(wikipediaEntryContent.document.querySelector("title").innerHTML);
// Template fields.
let titleLineHTML, entryContentHTML, thumbnailFigureHTML;
let popFrameTitle, popFrameTitleLinkHref;
let contentTypeClass = "wikipedia-entry";
// Intermediate values.
let secondaryTitleLinksHTML = "";
// Whole page, one section, or intro+TOC.
if (wholePage) {
titleLineHTML = renderTitleLinkHTML(articleLink.href, pageTitleHTML);
entryContentHTML = wikipediaEntryContent.document.innerHTML;
} else if (articleLink.hash > "") {
let targetElement = wikipediaEntryContent.document.querySelector(selectorFromHash(articleLink.hash));
/* Check whether we have tried to load a part of the page which
does not exist.
*/
if (targetElement == null) {
// No entry content, because the target was not found.
titleLineHTML = renderTitleLinkHTML(articleLink.href, pageTitleHTML);
} else if (/H[0-9]/.test(targetElement.tagName)) {
// The target is a section heading.
let targetHeading = targetElement;
// The id is on the heading, so the section is its parent.
let targetSection = targetHeading.parentElement.cloneNode(true);
// Excise heading.
targetHeading = targetSection.firstElementChild;
targetHeading.remove();
// Unwrap or delete links, but save them for inclusion in the template.
// First link is the section title itself.
targetHeading.querySelectorAll("a:first-of-type").forEach(link => {
// Process link, save HTML, unwrap.
Content.contentTypes.wikipediaEntry.qualifyWikipediaLink(link, articleLink);
Content.contentTypes.wikipediaEntry.designateWikiLink(link);
secondaryTitleLinksHTML += link.outerHTML;
unwrap(link);
});
// Additional links are other things, who knows what.
targetHeading.querySelectorAll("a").forEach(link => {
// Process link, save HTML, delete.
Content.contentTypes.wikipediaEntry.qualifyWikipediaLink(link, articleLink);
Content.contentTypes.wikipediaEntry.designateWikiLink(link);
secondaryTitleLinksHTML += link.outerHTML;
link.remove();
});
if (secondaryTitleLinksHTML > "")
secondaryTitleLinksHTML = ` (${secondaryTitleLinksHTML})`;
/* Full article link (transformed), plus live section
link with cleaned title text. (We will attach the
secondary title links, if any, later.)
*/
titleLineHTML = renderTitleLinkHTML(modifiedURL(articleLink, { hash: "" }).href, pageTitleHTML, true)
+ " § " // ‘§’
+ renderTitleLinkHTML(articleLink.href, targetHeading.innerHTML);
/* Content sans heading, with TOC (if there are any
subsections).
*/
let entryContentDoc = newDocument(targetSection.innerHTML);
entryContentDoc.insertBefore(newDocument(buildArticleTOC(entryContentDoc.querySelectorAll("section"))),
entryContentDoc.querySelector("section"));
entryContentHTML = entryContentDoc.innerHTML;
// Designate content type.
contentTypeClass += " wikipedia-section";
} else {
// The target is something else.
titleLineHTML = renderTitleLinkHTML(articleLink.href, `${articleLink.hash} (${pageTitleHTML})`);
entryContentHTML = Transclude.blockContext(targetElement, articleLink).innerHTML;
}
} else {
titleLineHTML = renderTitleLinkHTML(articleLink.href, pageTitleHTML);
entryContentHTML = wikipediaEntryContent.document.querySelector("[data-mw-section-id='0']").innerHTML
+ buildArticleTOC(Array.from(wikipediaEntryContent.document.querySelectorAll("section")).slice(1));
}
// Document fragment, for entry content post-processing.
let contentDocument = newDocument(entryContentHTML);
// Post-process entry content.
Content.contentTypes.wikipediaEntry.postProcessEntryContent(contentDocument, articleLink);
// Request image inversion judgments from invertOrNot.
requestImageInversionJudgmentsForImagesInContainer(contentDocument);
// Request image outlining judgments from outlineOrNot.
requestImageOutliningJudgmentsForImagesInContainer(contentDocument);
// Pull out initial figure (thumbnail).
if (GW.mediaQueries.mobileWidth.matches == false) {
let initialFigure = contentDocument.querySelector("figure.float-right:first-child");
if (initialFigure) {
thumbnailFigureHTML = initialFigure.outerHTML;
initialFigure.remove();
}
}
// Entry content, after processing.
entryContentHTML = contentDocument.innerHTML;
// Pop-frame title text and link.
popFrameTitle = newElement("SPAN", null, { innerHTML: titleLineHTML });
popFrameTitleLinkHref = articleLink.href;
// Attach secondary links (if any) to title line.
titleLineHTML += secondaryTitleLinksHTML;
return {
content: {
titleLine: titleLineHTML,
entryContent: entryContentHTML,
thumbnailFigure: thumbnailFigureHTML
},
contentTypeClass: contentTypeClass,
template: "wikipedia-entry-blockquote-inside",
popFrameTemplate: "wikipedia-entry-blockquote-not",
popFrameTitle: popFrameTitle.textContent,
popFrameTitleLinkHref: popFrameTitleLinkHref,
annotationFileIncludeTemplate: "wikipedia-entry-blockquote-title-not"
};
},
additionalAPIRequestHeaders: {
"Accept": 'text/html; charset=utf-8; profile="https://www.mediawiki.org/wiki/Specs/HTML/2.1.0"'
},
/* Qualify a link in a Wikipedia article.
*/
qualifyWikipediaLink: (link, hostArticleLink) => {
if (link.getAttribute("href") == null)
return;
// Qualify link.
if (link.matches([
"a[rel='mw:WikiLink']",
"a[rel='mw:referencedBy']",
"span[rel='mw:referencedBy'] a",
"sup.mw-ref a",
].join(", ")))
link.pathname = "/wiki" + link.getAttribute("href").slice(1);
if (link.getAttribute("href").startsWith("#"))
link.pathname = hostArticleLink.pathname;
if (link.hostname == location.hostname)
link.hostname = hostArticleLink.hostname;
if ( link.hostname == hostArticleLink.hostname
&& link.pathname.startsWith("/wiki/") == false
&& link.pathname.startsWith("/api/") == false)
link.pathname = "/wiki" + link.pathname;
},
/* Mark a wiki-link appropriately, as annotated, or live, or neither.
*/
designateWikiLink: (link) => {
if (/(.+?)\.wikipedia\.org/.test(link.hostname)) {
if (Content.contentTypes.wikipediaEntry.matches(link)) {
link.classList.add("content-transform");
} else {
if (( link.pathname.startsWith("/wiki/Special:")
|| link.pathname == "/w/index.php"
) == false)
link.classList.add("link-live");
}
}
},
/* Elements to excise from a Wikipedia entry.
*/
extraneousElementSelectors: [
"style",
// ".mw-ref",
".shortdescription",
"td hr",
".hatnote",
".portal",
".penicon",
// ".reference",
".Template-Fact",
".error",
".mwe-math-mathml-inline",
".mwe-math-mathml-display",
".sidebar",
".ambox",
".unicode.haudio",
// "span[typeof='mw:File']",
"link",
"span[typeof='mw:FallbackId']"
],
/* CSS properties to preserve when stripping inline styles.
*/
preservedInlineStyleProperties: [
"display",
"position",
"top",
"left",
"bottom",
"right",
"width",
"height",
"word-break"
],
/* Post-process an already-constructed content-transformed
Wikipedia entry (do HTML cleanup, etc.).
*/
postProcessEntryContent: (contentDocument, articleLink) => {
// Remove unwanted elements.
contentDocument.querySelectorAll(Content.contentTypes.wikipediaEntry.extraneousElementSelectors.join(", ")).forEach(element => {
element.remove();
});
// Clean empty nodes.
contentDocument.childNodes.forEach(node => {
if (isNodeEmpty(node))
node.remove();
});
// Remove location maps (they don’t work right).
contentDocument.querySelectorAll(".locmap").forEach(locmap => {
(locmap.closest("tr") ?? locmap).remove();
});
// Remove other maps.
contentDocument.querySelectorAll("img").forEach(image => {
let imageSourceURL = URLFromString(image.src);
if (imageSourceURL.hostname == "maps.wikimedia.org")
image.remove();
});
// Remove empty paragraphs.
contentDocument.querySelectorAll("p:empty").forEach(emptyGraf => {
emptyGraf.remove();
});
// Remove edit-links.
contentDocument.querySelectorAll("a[title^='Edit this on Wiki'], a[title^='Edit this at Wiki']").forEach(editLink => {
editLink.remove();
});
// Remove GPS coordinates.
contentDocument.querySelectorAll(".geo-inline-hidden").forEach(gpsCoords => {
let containingGraf = gpsCoords.closest("p");
gpsCoords.remove();
if (containingGraf.textContent.trim() == "")
containingGraf.remove();
});
// Process links.
contentDocument.querySelectorAll("a").forEach(link => {
// De-linkify non-anchor self-links.
if ( link.hash == ""
&& link.pathname == articleLink.pathname) {
unwrap(link);
return;
}
// Qualify links.
Content.contentTypes.wikipediaEntry.qualifyWikipediaLink(link, articleLink);
// Mark other Wikipedia links as also being annotated.
Content.contentTypes.wikipediaEntry.designateWikiLink(link);
// Mark self-links (anchorlinks within the same article).
if (link.pathname == articleLink.pathname)
link.classList.add("link-self");
});
// Prevent layout weirdness for footnote links.
contentDocument.querySelectorAll("a[href*='#cite_note-']").forEach(citationLink => {
citationLink.classList.add("icon-not");
citationLink.innerHTML = "⁠" + citationLink.textContent.trim();
});
// Rectify back-to-citation links in “References” sections.
contentDocument.querySelectorAll("a[rel='mw:referencedBy']").forEach(backToCitationLink => {
backToCitationLink.classList.add("icon-not");
backToCitationLink.classList.add("wp-footnote-back");
backToCitationLink.innerHTML = backToCitationLink.textContent.trim();
});
// Strip inline styles and some related attributes.
let tableElementsSelector = "table, thead, tfoot, tbody, tr, th, td";
contentDocument.querySelectorAll("[style]").forEach(styledElement => {
// Skip table elements; we handle those specially.
if (styledElement.matches(tableElementsSelector))
return;
if (styledElement.style.display != "none")
stripStyles(styledElement, { saveProperties: Content.contentTypes.wikipediaEntry.preservedInlineStyleProperties });
});
// Special handling for table elements.
contentDocument.querySelectorAll(tableElementsSelector).forEach(tableElement => {
if (tableElement.style.display != "none") {
if (tableElement.style.position == "relative")
stripStyles(tableElement, { saveProperties: [ "text-align", "position", "width", "height" ] });
else
stripStyles(tableElement, { saveProperties: [ "text-align" ] });
}
[ "width", "height", "align" ].forEach(attribute => {
tableElement.removeAttribute(attribute);
});
});
// Rectify table classes.
contentDocument.querySelectorAll("table.sidebar").forEach(table => {
table.classList.toggle("infobox", true);
});
// Normalize table cell types.
contentDocument.querySelectorAll("th:not(:only-child)").forEach(cell => {
let rowSpan = (cell.rowSpan > 1) ? ` rowspan="${cell.rowSpan}"` : ``;
let colSpan = (cell.colSpan > 1) ? ` colspan="${cell.colSpan}"` : ``;
cell.outerHTML = `<td${rowSpan}${colSpan}>${cell.innerHTML}</td>`;
});
// Un-linkify images.
contentDocument.querySelectorAll("a img").forEach(linkedImage => {
let enclosingLink = linkedImage.closest("a");
enclosingLink.parentElement.replaceChild(linkedImage, enclosingLink);
});
// Fix chemical formulas.
contentDocument.querySelectorAll(".chemf br").forEach(br => {
br.remove();
});
// Rectify quoteboxes.
contentDocument.querySelectorAll("div.quotebox").forEach(quotebox => {
let blockquote = quotebox.querySelector("blockquote");
blockquote.classList.add("quotebox");
let title = quotebox.querySelector(".quotebox-title");
if (title) {
blockquote.insertBefore(title, blockquote.firstElementChild);
}
let cite = quotebox.querySelector("blockquote + p");
if (cite) {
blockquote.insertBefore(cite, null);
cite.classList.add("quotebox-citation");
}
unwrap(quotebox);
});
// Separate out the thumbnail and float it.
let thumbnail = contentDocument.querySelector("img");
let thumbnailContainer;
if (thumbnail)
thumbnailContainer = thumbnail.closest(".infobox-image, .thumb");
if ( thumbnail
&& thumbnailContainer
&& thumbnailContainer.closest(".gallery") == null) {
while ([ "TR", "TD", "TH" ].includes(thumbnailContainer.tagName))
thumbnailContainer = thumbnailContainer.parentElement;
// Create the figure and move the thumbnail(s) into it.
let figure = newElement("FIGURE", { "class": "thumbnail float-right" });
thumbnailContainer.querySelectorAll(".infobox-image img, .thumb img").forEach(image => {
if (image.closest("figure") == figure)
return;
let closestRow = image.closest("tr, .trow, [style*='display: table-row']");
if (closestRow == null)
return;