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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
#include "mozilla/ClearOnShutdown.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/XULStore.h"
#include "nsCOMPtr.h"
namespace mozilla {
// The XULStore API is implemented in Rust and exposed to C++ via a set of
// C functions with the "xulstore_" prefix. We declare them in this anonymous
// namespace to prevent C++ code outside this file from accessing them,
// as they are an internal implementation detail, and C++ code should use
// the mozilla::XULStore::* functions and mozilla::XULStoreIterator class
// declared in XULStore.h.
namespace {
extern "C" {
void xulstore_new_service(nsIXULStore** result);
nsresult xulstore_set_value(const nsAString* doc, const nsAString* id,
const nsAString* attr, const nsAString* value);
nsresult xulstore_has_value(const nsAString* doc, const nsAString* id,
const nsAString* attr, bool* has_value);
nsresult xulstore_get_value(const nsAString* doc, const nsAString* id,
const nsAString* attr, nsAString* value);
nsresult xulstore_remove_value(const nsAString* doc, const nsAString* id,
const nsAString* attr);
XULStoreIterator* xulstore_get_ids(const nsAString* doc, nsresult* result);
XULStoreIterator* xulstore_get_attrs(const nsAString* doc, const nsAString* id,
nsresult* result);
bool xulstore_iter_has_more(const XULStoreIterator*);
nsresult xulstore_iter_get_next(XULStoreIterator*, nsAString* value);
void xulstore_iter_free(XULStoreIterator* iterator);
nsresult xulstore_shutdown();
}
// A static reference to the nsIXULStore singleton that JS uses to access
// the store. Retrieved via mozilla::XULStore::GetService().
static StaticRefPtr<nsIXULStore> sXULStore;
} // namespace
bool XULStoreIterator::HasMore() const { return xulstore_iter_has_more(this); }
nsresult XULStoreIterator::GetNext(nsAString* item) {
return xulstore_iter_get_next(this, item);
}
void DefaultDelete<XULStoreIterator>::operator()(XULStoreIterator* ptr) const {
xulstore_iter_free(ptr);
}
namespace XULStore {
already_AddRefed<nsIXULStore> GetService() {
nsCOMPtr<nsIXULStore> xulStore;
if (sXULStore) {
xulStore = sXULStore;
} else {
xulstore_new_service(getter_AddRefs(xulStore));
sXULStore = xulStore;
mozilla::ClearOnShutdown(&sXULStore);
}
return xulStore.forget();
}
nsresult SetValue(const nsAString& doc, const nsAString& id,
const nsAString& attr, const nsAString& value) {
return xulstore_set_value(&doc, &id, &attr, &value);
}
nsresult HasValue(const nsAString& doc, const nsAString& id,
const nsAString& attr, bool& has_value) {
return xulstore_has_value(&doc, &id, &attr, &has_value);
}
nsresult GetValue(const nsAString& doc, const nsAString& id,
const nsAString& attr, nsAString& value) {
return xulstore_get_value(&doc, &id, &attr, &value);
}
nsresult RemoveValue(const nsAString& doc, const nsAString& id,
const nsAString& attr) {
return xulstore_remove_value(&doc, &id, &attr);
}
nsresult GetIDs(const nsAString& doc, UniquePtr<XULStoreIterator>& iter) {
// We assign the value of the iter here in C++ via a return value
// rather than in the Rust function via an out parameter in order
// to ensure that any old value is deleted, since the UniquePtr's
// assignment operator won't delete the old value if the assignment
// happens in Rust.
nsresult result;
iter.reset(xulstore_get_ids(&doc, &result));
return result;
}
nsresult GetAttrs(const nsAString& doc, const nsAString& id,
UniquePtr<XULStoreIterator>& iter) {
// We assign the value of the iter here in C++ via a return value
// rather than in the Rust function via an out parameter in order
// to ensure that any old value is deleted, since the UniquePtr's
// assignment operator won't delete the old value if the assignment
// happens in Rust.
nsresult result;
iter.reset(xulstore_get_attrs(&doc, &id, &result));
return result;
}
nsresult Shutdown() { return xulstore_shutdown(); }
}; // namespace XULStore
}; // namespace mozilla
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