Blurred (except when hovered) option

[domdomegg]

From email:

I really like your chrome YouTube Thumbnail Hider extension. It's very useful for my productivity and I have a suggestion that me and likely a lot of others would benefit even more from.

Suggestion: To have an option to blur YouTube thumbnails except when hovered, similar to the other provided options 'Hidden (except when hovered)' and 'Blurred'.
This new option would be called something like 'Blurred (except when hovered)'.

I suspect this would look very similar to the blurred option CSS, but setting the filter to not blur when hovered. The PR would likely look like #15.

[domdomegg]

An example implementation that will unblur on hover - but only when the autoplay on hover is disabled. This was kindly sent to me by someone else over email.

This could be a potential starting point for implementing this.

/** @typedef {import("./common")} */

const css = {
  "normal": "/* Nothing to do */",
  "hidden": `
ytd-thumbnail, ytd-playlist-thumbnail, .rich-thumbnail, .ytd-playlist-header-renderer.thumbnail-wrapper, #thumbnail, #video-preview, ytm-media-item .media-item-thumbnail-container, ytm-reel-item-renderer .video-thumbnail-container-vertical, ytm-playlist-video-renderer .compact-media-item-image, .ytp-videowall-still-image {
  display: none !important;
}
ytm-reel-shelf-renderer .reel-shelf-items>* {
  height: auto !important;
  align-items: flex-start !important;
}
ytm-reel-item-renderer .reel-item-metadata {
  position: static !important;
}
.ytp-videowall-still-info-content {
  opacity: 1 !important;
}`,
  "hidden-except-hover": `
ytd-thumbnail {
  transition: 0.25s ease-in all;
  overflow: hidden;
  max-height: 400px;
  max-width: 360px;
}

ytd-rich-item-renderer:not(:hover) ytd-thumbnail,
ytd-grid-video-renderer:not(:hover) ytd-thumbnail,
ytd-playlist-video-renderer:not(:hover) ytd-thumbnail {
  max-height: 0px !important;
  min-height: 0px !important;
}

ytd-playlist-video-renderer:not(:hover) ytd-thumbnail,
.ytd-item-section-renderer:not(:hover) ytd-thumbnail {
  max-width: 0px !important;
  min-width: 0px !important;
}

.ytd-ghost-grid-renderer.rich-thumbnail,
.skeleton-bg-color.rich-thumbnail,
.ytd-playlist-header-renderer.thumbnail-wrapper,
.ytp-videowall-still:not(:hover) .ytp-videowall-still-image,
#video-preview {
  display: none !important;
}

.ytp-videowall-still-info-content {
  opacity: 1 !important;
}`,
"blurred": `
    ytd-thumbnail img, ytd-playlist-thumbnail img, .video-thumbnail-img, .ytp-videowall-still-image {
        filter: blur(16px);
    }
    yt-image:hover img {
        filter: none;
    }
`,
  "solid-color": `
.yt-core-image {
  display: none !important;
  background-color: var(--yt-spec-additive-background);
}

ytd-thumbnail.style-scope.ytd-compact-video-renderer {
  background-color: var(--yt-spec-additive-background);
  border-radius: 1rem;
}

ytd-thumbnail #thumbnail.ytd-thumbnail {
  background-color: var(--yt-spec-additive-background);
}

.ytp-videowall-still-image {
  background-color: var(--yt-spec-static-overlay-filled-hover);
  background-image: none !important;
}
.ytp-videowall-still-info-content {
  opacity: 1 !important;
}`,
};

const elem = document.createElement("style");
document.documentElement.appendChild(elem);

const updateElem = async () => {
  const options = await loadOptions()

  const isDisabled = options.disabledOnPages.everywhere
    || (options.disabledOnPages.results && window.location.pathname === '/results')
    || (options.disabledOnPages.channel && window.location.pathname.startsWith('/@'))
    || (options.disabledOnPages.playlist && window.location.pathname === '/playlist')
    || (options.disabledOnPages.watch && window.location.pathname === '/watch')
    || (options.disabledOnPages.subscriptions && window.location.pathname === '/feed/subscriptions');

  elem.innerHTML = `/* Injected by the Hide YouTube Thumbnails extension */
  ${css[isDisabled ? 'normal' : options.thumbnailMode]}`
}

// Update when settings are changed
browser.storage.onChanged.addListener(updateElem)

// Update when moving page
// Also see https://github.com/domdomegg/hideytthumbnails-extension/issues/17
// In future we should use the Navigation API when it's supported in Firefox
// https://developer.mozilla.org/en-US/docs/Web/API/Navigation_API
let lastPathname = window.location.pathname;
setInterval(() => {
  if (lastPathname !== window.location.pathname) {
    lastPathname = window.location.pathname
    updateElem();
  }
}, 200);

// Initialize on load
updateElem()