bastion 0.53.2

client-go/uipopup_windows.go

@@ -0,0 +1,61 @@
+//go:build windows
+
+package main
+
+// uipopup_windows.go — the approvals page as a small window of its own.
+//
+// A browser TAB is the wrong shape for "something needs your yes": it lands in
+// whatever window was last used, behind whatever the person was doing, among
+// forty other tabs. Edge's app mode (`--app=<url>`) opens the page in a
+// window with no tabs, no address bar and a size we choose — a popup, which is
+// what the person asked for — and Edge ships with every supported Windows.
+//
+// NOT a native dialog, and that is forced rather than chosen: the release is
+// built at CGO_ENABLED=0 (tray_windows.go), and a native window with a list and
+// buttons in pure Go is a GUI toolkit this binary does not carry. The page is
+// the same server-rendered page the front page uses, so there is one set of
+// words and one approve path, not two.
+//
+// FALLBACK. No Edge where we look, or Edge will not start: the default browser,
+// exactly as openLocalUI does. The person still gets the page; it is a tab.
+
+import (
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+// popupWindowSize is wide enough for an approval card's two buttons side by side
+// and tall enough for three cards before scrolling.
+const popupWindowSize = "560,760"
+
+func openPopupWindow(url string) error {
+	if edge := findEdge(); edge != "" {
+		// NOT hideConsole: Edge is a GUI program with no console, and the flag
+		// that hides one asks Windows to start the first window hidden — which
+		// a cold-started Edge may honour, opening the popup invisible.
+		cmd := exec.Command(edge, "--app="+url, "--window-size="+popupWindowSize)
+		err := cmd.Start()
+		if err == nil {
+			go func() { _ = cmd.Wait() }()
+			return nil
+		}
+		uilogf("approvals popup: could not start Edge (%v); opening the default browser\n", err)
+	}
+	return openBrowser(url)
+}
+
+// findEdge looks where Edge installs: machine-wide under both Program Files
+// roots, and per-user under LOCALAPPDATA. "" when it is in none of them.
+func findEdge() string {
+	for _, root := range []string{os.Getenv("ProgramFiles(x86)"), os.Getenv("ProgramFiles"), os.Getenv("LOCALAPPDATA")} {
+		if root == "" {
+			continue
+		}
+		p := filepath.Join(root, "Microsoft", "Edge", "Application", "msedge.exe")
+		if st, err := os.Stat(p); err == nil && !st.IsDir() {
+			return p
+		}
+	}
+	return ""
+}