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fix(panes): don't hide a docked pane; don't force display; restore visibility

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Six more findings from CodeRabbit on #928. Three are real bugs.

1. THE CHIP HID DOCKED PANES. `_onOpened` decided "did the pane take my
   element?" from `ownerDocument !== document`. That is true for a pane in a
   pop-out window — and false for a pane moved into the DOCK, which lives in
   this very document. So docking a pane stamped `.fb-pane-detached`
   (display:none !important) onto the panel the user was looking at, and put
   the stub next to it instead of at its home.

   The element cannot answer this question — `isConnected` is true in a pane
   window, `ownerDocument` is this one in the dock. Both were live bugs. Ask
   the manager, which knows exactly what it handed to the host:
   `panes.elementOf(id)`. That holds for every host, and for reconciling after
   the fact (detail == null), which is what a plugin rebuilding its panel
   mid-pop-out triggers.

2. `.fb-paned` FORCED `display: block !important`. A panel that is
   `display:flex` or `grid` would be silently re-laid-out while detached —
   the exact opposite of "placement only", and precisely the kind of surprise
   this feature exists to avoid. Removed.

   Making a hidden panel visible is a separate job, and it now belongs to the
   manager, which does it without touching the panel's display MODE: clear
   `hidden`, and clear an inline `display:none` if that is how the panel hides.

3. VISIBILITY IS NOW RESTORED. The hosts used to set `el.hidden = false` and
   never put it back, so the docs' "core only changes placement" was a lie and
   a panel's hidden state was quietly lost. The manager stashes both `hidden`
   and the inline `display` on open and restores them on dock: a panel that was
   closed when you opened its pane from the tray goes back to being closed; one
   that was open stays open.

Plus:

- The launcher rebuilt its whole list on every panes:opened/closed — including
  the one fired by clicking a button in that list — destroying the button under
  the user's finger and dropping focus to <body>. It now restores focus to the
  toggled pane's button.
- `_copyStyles` cloned every stylesheet link, including the panes.css that
  pane.html already loads. Skip sheets the pane document already has.
- Docs: the chip may route to the DOCK, not always a window (it goes through
  detach() → the host router). `header` precedence was documented backwards —
  an explicit `header` wins. And the visibility contract above is now written
  down rather than being a surprise.

Signed-off-by: topkoa <topkoa@gmail.com>
This commit is contained in:
topkoa
2026-07-12 19:24:00 -04:00
parent b74a364857
commit cb425ed48d
7 changed files with 360 additions and 292 deletions
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static/panes/pane-window-host.js
+6 -4
View File
@@ -55,7 +55,13 @@
// Cloned rather than shared: a <link> node can only live in one document, and
// we are not about to steal the app's own stylesheet out of its head.
function _copyStyles(doc) {
// pane.html already links panes.css, so don't clone a second copy of it —
// duplicate sheets cost a redundant fetch and an extra style recalc for no
// change in appearance.
const have = new Set(
Array.from(doc.querySelectorAll('link[rel="stylesheet"]')).map((l) => l.href));
document.querySelectorAll('link[rel="stylesheet"], style').forEach((node) => {
if (node.tagName === 'LINK' && have.has(node.href)) return;
try { doc.head.appendChild(node.cloneNode(true)); } catch (e) { /* skip a node we can't clone */ }
});
// Carry the theme/scale hooks the app hangs on <html> and <body>. v3 keys
@@ -150,10 +156,6 @@
// casting a drop shadow over nothing. Neutralise the *placement* while
// touching nothing else about how it looks.
el.classList.add('fb-paned');
// Some panels are hidden until opened (Camera Director's is `hidden` until
// you click its launcher). It is being shown on purpose now.
el.hidden = false;
root.appendChild(doc.adoptNode(el));
doc.title = spec.title + ' — fee[dB]ack';