theseus/addon-tab-preload.js
Local Dev 638aa4d326 feat(theseus/addons): CDP capture + editor Discard + manual update controls
Three tied-together fixes:

1) captureTab moves from WebContents.capturePage() to CDP
   Page.captureScreenshot for every mode (visible / full / region).
   Blank-screenshot symptom: after a toolbar-menu selection, the OS
   popup teardown left the tab view marked occluded for a few frames
   on some Windows setups, so capturePage() snapshotted a
   stale/transparent frame at the correct dimensions — no 0x0, no
   retry hit. CDP forces a fresh composite regardless of occlusion
   state (same path the "Full page" mode was already using) and
   returns a base64 PNG directly; PNG dimensions come out of the
   IHDR chunk (bytes 16-24). Attach only when nothing else has, and
   detach after only if WE attached, so an open DevTools stays
   attached.

2) Editor gets a Discard button. Toolbar picks up an "×" glyph next
   to Save/Copy that closes the editor tab and drops the working
   screenshot. Top-level Escape now falls through the same path
   after unwinding an in-flight text placement or crop rectangle. A
   new "addon-tab-close" IPC lets an add-on's own tab close itself
   (main matches the sender's webContents id against the tab list,
   so a page can only close its own tab); window.silentmode.closeTab()
   exposes it from addon-tab-preload.js.

3) Manual update controls in Settings > Extensions. New "Check for
   updates" button at the top of the Extensions surface calls the
   same signed-update polling the boot timer runs; the result is
   surfaced inline ("All extensions are up to date" / "N updates
   staged; restart Theseus to apply"). A "Pending updates" box
   below lists what's in <userData>/addons-updates-staged/ so the
   user knows what will be promoted on next restart.

Toolbar-menu popup settle bumped from 120 ms to 250 ms with an
explicit win.focus() in the popup close callback — the previous
window wasn't enough on slower Windows setups. CDP capture no longer
depends on this delay anyway, but the settle still helps any add-on
that does DOM work in its click handler before capture.

Screenshot add-on bumped 0.2.2 → 0.2.3 (Discard button; capture
fixes come from the host, not the add-on).
2026-09-08 02:27:36 +02:00

20 lines
1.2 KiB
JavaScript

// Preload for full-tab pages opened by api.openTab("<file>", {query}) — the
// "open-tab" capability. Same window.silentmode surface as the sidebar
// preload (storage / invoke / on) but WITHOUT the sidebar's picker strip and
// resize grip, which have no place in a normal tab. Main derives the add-on
// identity from the sender's file:// URL, so a page hosted anywhere else
// gets nothing back from these handlers.
const { contextBridge, ipcRenderer } = require("electron");
contextBridge.exposeInMainWorld("silentmode", {
storage: {
get: (key, fallback = null) => ipcRenderer.invoke("addon-storage-get", key, fallback),
set: (key, value) => ipcRenderer.invoke("addon-storage-set", key, value),
all: () => ipcRenderer.invoke("addon-storage-all"),
},
invoke: (msg, payload) => ipcRenderer.invoke("addon-msg", String(msg), payload),
on: (msg, cb) => ipcRenderer.on("addon-event", (_e, name, payload) => { if (name === msg) cb(payload); }),
// Close the tab this page lives in. Used by editor "Discard" and by
// Escape. Main derives the tab from the sender's webContents id so an
// add-on page can only close its own tab, never anyone else's.
closeTab: () => ipcRenderer.invoke("addon-tab-close"),
});