0.3.33 still ships blank screenshots because the whole toolbar-menu → auto-
open-editor path can't be made race-free: the moment the editor tab opens
it becomes the active tab, and a snapshot of the editor's own tab (before
its canvas has drawn from storage) is a valid-looking 24 KB all-white PNG.
The lastCapturableTabId fallback I added in a279864 catches the second
click, but the first click can still land on the addon-owned tab whenever
the user re-triggers before setActive has settled.
Rebuild the UX so this class of race can't happen at all:
- Drop the toolbar-menu capability. Manifest is back to sidebar-panel +
capture-tab + open-tab, so the dock icon opens the panel (never the
editor directly). No dropdown, no clip-under-tab-view issue, no auto-
jump into an addon-owned tab.
- Sidebar has the three capture buttons + a preview <img> + a "Open in
editor tab" button. The preview is fed a data:image/png URL returned
straight from api.captureTab, rendered inside the sidebar's own
document — same origin, no file:// cross-directory gotcha, and the user
can see immediately whether the shot actually landed.
- Editor.html tab opens only on an explicit "Open in editor tab" click.
The addon rewrites __pending at that moment (so the editor always sees
the just-selected capture even if a prior editor tab drained the entry),
then api.openTab("editor.html", {name}). The editor's storage-based
load path is unchanged.
- Recent captures ring is kept and now exposed as a horizontal thumbnail
strip in the sidebar; clicking a tile re-previews that capture and
arms "Open in editor tab" for it.
Editor page (editor.html/js/css) unchanged — same crop / arrow / rect /
ellipse / pen / text / mosaic-redact / undo / redo / copy / save.
Bundled but not shipped — leaving version bump + deploy to the parent
session.
Reworks the screenshot addon into the flow the user asked for: the
dock icon opens a small dropdown menu (Visible viewport / Full page /
Region…) instead of the sidebar picker, and each capture opens a
full browser tab hosting an editor.
Two new addon-host capabilities land alongside:
- toolbar-menu: the addon declares an icon + item list in its manifest;
the chrome dock renders a button that, on click, opens a small menu
and dispatches the selection to the addon via addon-menu-select IPC.
- open-tab: api.openTab(path) opens a browser tab whose URL is the
addon's local file. Origin-gated per addon; the editor uses a
dedicated addon-tab-preload for its main → renderer bridge.
Editor page (editor.html/js/css):
- Crop, arrow, rectangle, circle, freehand pen, text, blur
- Colour swatches (red / yellow / acid / white / black), 3 stroke widths
- Undo/redo command stack, zoom controls
- Save PNG (goes through the download pipeline, chip picks it up)
- Copy to clipboard via ClipboardItem
New capture-tab capability on the addon-host, and the screenshot add-on
uses it to expose three modes in a sidebar launcher panel:
- Visible viewport: Electron's WebContents.capturePage() on the active tab
- Full scrollable page: temp-resize the tab view to document.scrollHeight,
capturePage, restore
- Region: preload overlays a translucent selection div, tracks mousedown /
move / up, sends the rect back; main takes the visible capture and
crops via nativeImage.crop({x,y,width,height})
Saves land in the user's Downloads folder via session.downloadURL — same
pipeline as any file download, so the download chip picks them up.
Filename: theseus-screenshot-<host>-<ISO date>.png. JPEG option for
smaller files.
A follow-up task (task_b9608dc6) reworks this to open captures in a
full-tab editor with crop / draw / annotate / undo / copy-to-clipboard
instead of the current bare launcher.
