More work on LibreOffice support.

internal/atspi/libreoffice.go

@@ -4,6 +4,11 @@
 
 package atspi
 
+import (
+	"strings"
+	"unicode/utf8"
+)
+
 // LibreOfficeContext is bounded, copied metadata from the native owner. It
 // describes Calc's cell and temporary editor objects, without native handles.
 // Presentation and application policy must not query the provider themselves.
@@ -15,6 +20,7 @@ type LibreOfficeContext struct {
 	ContainerFocused bool
 	CellText         string
 	Coordinates      string
+	Formula          string
 }
 
 // IsLibreOfficeProcess uses /proc identity verified by the adapter. An
@@ -22,3 +28,16 @@ type LibreOfficeContext struct {
 func IsLibreOfficeProcess(process string) bool {
 	return process == "soffice.bin"
 }
+
+// Preserve spaces inside formula string literals and keep the beginning when
+// bounding long expressions. Text context's default suffix is for caret lines.
+func sanitizeLibreOfficeFormula(value string) string {
+	value = strings.ToValidUTF8(value, "�")
+	if len(value) > maxSnapshotFieldLength {
+		value = value[:maxSnapshotFieldLength]
+		for !utf8.ValidString(value) {
+			value = value[:len(value)-1]
+		}
+	}
+	return sanitizeTextContext(value)
+}

internal/atspi/libreoffice_native.go

@@ -120,6 +120,9 @@ func captureLibreOfficeContext(source *C.AtspiAccessible, snapshot *Snapshot) {
 			grandparentRole == C.ATSPI_ROLE_DOCUMENT_SPREADSHEET
 	if context.Cell {
 		context.Coordinates = snapshot.Name
+		// Orca requests uncached attributes: editing can replace a formula
+		// without replacing the accessible cell.
+		C.atspi_accessible_clear_cache_single(source)
 		attributes := C.atspi_accessible_get_attributes(source, nil)
 		if attributes != nil {
 			columnKey, rowKey := C.CString("colindextext"), C.CString("rowindextext")
@@ -130,6 +133,16 @@ func captureLibreOfficeContext(source *C.AtspiAccessible, snapshot *Snapshot) {
 			if column != "" && row != "" {
 				context.Coordinates = sanitizeSnapshotField(column + row)
 			}
+			// Current providers use lowercase; Orca also accepts Formula.
+			for _, key := range []string{"formula", "Formula"} {
+				name := C.CString(key)
+				value := C.g_hash_table_lookup(attributes, C.gconstpointer(name))
+				C.free(unsafe.Pointer(name))
+				if value != nil {
+					context.Formula = sanitizeLibreOfficeFormula(C.GoString((*C.gchar)(value)))
+					break
+				}
+			}
 			C.g_hash_table_unref(attributes)
 		}
 		text := C.atspi_accessible_get_text_iface(source)

internal/atspi/libreoffice_test.go

@@ -0,0 +1,23 @@
+// Copyright (c) 2026 Storm Dragon
+// Authors: Storm Dragon, Angus Kola
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package atspi
+
+import (
+	"strings"
+	"testing"
+	"unicode/utf8"
+)
+
+func TestLibreOfficeFormulaPreservesLiteralSpacesAndBoundedPrefix(t *testing.T) {
+	formula := `="two  spaces"`
+	if got := sanitizeLibreOfficeFormula(formula); got != formula {
+		t.Fatalf("formula literal changed: %q", got)
+	}
+	formula += strings.Repeat("猫", maxSnapshotFieldLength)
+	got := sanitizeLibreOfficeFormula(formula)
+	if len(got) > maxSnapshotFieldLength || !utf8.ValidString(got) || !strings.HasPrefix(formula, got) {
+		t.Fatalf("invalid bounded formula prefix: bytes=%d", len(got))
+	}
+}