Previously tags where very much focused on color coding email and less about
adding additional information. They were also visualized in different ways in
different locations.
This commit gets rid of all "Color-coding" references, aligns visualization of
the tags across the whole project and tries to improve user experience of using
tags in general.
A search box is shown in the tagging control so the user can quickly search for
a tag if they have a huge (more than 10) amount of tags.
- levels are joined by forward slashes in the keywords
- behaviour is opt-in for now
- long paths are shortened if there is not enough display room
Closes#687.
Closes#560.
Composes the active inbox's unread count over the base favicon as an SVG
badge, served as a percent-encoded data: URL, so new mail is visible on a
tab that is not focused — including when the browser collapses tabs to
icon-only, where a title-based count disappears entirely.
The base icon is read from the rendered <link rel="icon"> rather than from
config, so admin and per-domain branding overrides are inherited for free:
the count is drawn on whatever logo the deployment actually serves. Keeping
the badge in SVG rather than rasterising to a canvas also means the browser
can rasterise it at whatever size it asks for, so a HiDPI tab is not served a
16px bitmap.
Notes on the approach:
- The badge link is an *additional* icon link that we append and mark as
ours; we never remove or mutate a link we did not create. Next's metadata
icons are rendered by React, which keeps a fiber pointing at that DOM node,
so removing it would leave React holding a detached node and throw
"Cannot read properties of null (reading 'removeChild')" on the next
commit that deletes the fiber. Appending instead means the last-declared
icon wins, and non-SVG fallback links survive with their type/sizes intact.
(The usual recipe for this feature — assign canvas.toDataURL() to the
existing link's href — does both of the things that break here.)
- Every change of state is an *insertion* of a fresh link of ours, never a
mutation or a removal, because that is the only signal a browser reliably
re-reads the favicon on. Firefox ignores an in-place href change, and it
equally ignores a removal — so clearing the badge by deleting our link left
a stale count painted on the tab until a hard reload. Clearing it instead
inserts a new link of ours carrying the original base href.
- Holding last place has to be defended: on a client-side navigation React
re-hoists its metadata icon link into <head>, landing after ours, and the
base icon silently wins again. A MutationObserver on <head> moves our own
link back to the end whenever a foreign icon link appears — moving only our
node, never anyone else's. It no-ops once ours is last again, so a move
cannot feed itself.
- The badge is a full-width band across the foot of the icon, drawn to the
metrics measured from Gmail's own 16px favicon: band height 0.625 of the
icon, digit cap height 0.44, flush to the edges, corners rounded by about a
pixel. Full width is what keeps a three-glyph label legible — rounded ends
waste exactly the horizontal space it needs. Neutral white with black digits
rather than the conventional red: faviconUrl is admin-overridable and
Bulwark's own icon is rgb(219,45,84), so a red badge sat red-on-red.
- The base SVG may be admin-uploaded, and the branding route deliberately
serves it under a sandboxing CSP because SVG can carry script. Re-emitting
it as a same-origin data: URL would un-fence that, so script, foreignObject
and every on* handler are stripped before serialising.
- Mounted in the root layout, not on the mail route: the badge belongs to the
tab, so mounting it on the page would clear it on every hop to settings,
calendar or contacts.
Mathy Vanvoorden