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Fix a crash when setting up toolbar editor actions

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LanguageClient::updateEditorToolBar() contained the static
hashes that were keeping raw pointers to different
objects. However, the lifetime of these objects wasn't
controlled, so it could happen that we were operating
on dangling pointers.

In fact, like in the bugreport, some text editor widget could have
been deleted (together with his outline action), while later another
one (coincidently with the same address) could have appeared.
The old mapped widget still pointed to the removed action
so we crash.

Instead of keeping a static hashes we attach the custom
child object to the widget and keep there QPointers to all objects
we are interested in.

Fixes: QTCREATORBUG-26588
Change-Id: I335d9848ea85372baf3328772f0a249cee242dcd
Reviewed-by: David Schulz <david.schulz@qt.io>
This commit is contained in:
Jarek Kobus
2021-11-19 08:14:50 +01:00
parent 897fbd8317
commit b62fbe3ab9
1 changed files with 60 additions and 51 deletions
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111
src/plugins/languageclient/languageclientutils.cpp
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@@ -202,6 +202,18 @@ void updateCodeActionRefactoringMarker(Client *client,
}
}
static const char clientExtrasName[] = "__qtcreator_client_extras__";
class ClientExtras : public QObject
{
public:
ClientExtras(QObject *parent) : QObject(parent) { setObjectName(clientExtrasName); };
QPointer<QAction> m_popupAction;
QPointer<Client> m_client;
QPointer<QAction> m_outlineAction;
};
void updateEditorToolBar(Core::IEditor *editor)
{
auto *textEditor = qobject_cast<BaseTextEditor *>(editor);
@@ -214,70 +226,67 @@ void updateEditorToolBar(Core::IEditor *editor)
TextDocument *document = textEditor->textDocument();
Client *client = LanguageClientManager::clientForDocument(textEditor->textDocument());
static QHash<QWidget *, QAction *> actions;
if (actions.contains(widget)) {
auto action = actions[widget];
ClientExtras *extras = widget->findChild<ClientExtras *>(clientExtrasName,
Qt::FindDirectChildrenOnly);
if (!extras) {
if (!client)
return;
extras = new ClientExtras(widget);
}
if (extras->m_popupAction) {
if (client) {
action->setText(client->name());
extras->m_popupAction->setText(client->name());
} else {
widget->toolBar()->removeAction(action);
actions.remove(widget);
delete action;
widget->toolBar()->removeAction(extras->m_popupAction);
delete extras->m_popupAction;
}
} else if (client) {
const QIcon icon = Utils::Icon({{":/languageclient/images/languageclient.png",
Utils::Theme::IconsBaseColor}})
.icon();
actions[widget] = widget->toolBar()->addAction(
icon, client->name(), [document]() {
auto menu = new QMenu;
auto clientsGroup = new QActionGroup(menu);
clientsGroup->setExclusive(true);
for (auto client : LanguageClientManager::clientsSupportingDocument(document)) {
auto action = clientsGroup->addAction(client->name());
auto reopen = [action, client = QPointer<Client>(client), document]() {
if (!client)
return;
LanguageClientManager::openDocumentWithClient(document, client);
action->setChecked(true);
};
action->setCheckable(true);
action->setChecked(client == LanguageClientManager::clientForDocument(document));
QObject::connect(action, &QAction::triggered, reopen);
}
menu->addActions(clientsGroup->actions());
menu->addAction("Inspect Language Clients", []() {
LanguageClientManager::showInspector();
});
menu->addAction("Manage...", []() {
Core::ICore::showOptionsDialog(Constants::LANGUAGECLIENT_SETTINGS_PAGE);
});
menu->popup(QCursor::pos());
Utils::Theme::IconsBaseColor}}).icon();
extras->m_popupAction = widget->toolBar()->addAction(
icon, client->name(), [document = QPointer(document)] {
auto menu = new QMenu;
auto clientsGroup = new QActionGroup(menu);
clientsGroup->setExclusive(true);
for (auto client : LanguageClientManager::clientsSupportingDocument(document)) {
auto action = clientsGroup->addAction(client->name());
auto reopen = [action, client = QPointer(client), document] {
if (!client)
return;
LanguageClientManager::openDocumentWithClient(document, client);
action->setChecked(true);
};
action->setCheckable(true);
action->setChecked(client == LanguageClientManager::clientForDocument(document));
QObject::connect(action, &QAction::triggered, reopen);
}
menu->addActions(clientsGroup->actions());
if (!clientsGroup->actions().isEmpty())
menu->addSeparator();
menu->addAction("Inspect Language Clients", [] {
LanguageClientManager::showInspector();
});
QObject::connect(widget, &QWidget::destroyed, [widget]() {
actions.remove(widget);
menu->addAction("Manage...", [] {
Core::ICore::showOptionsDialog(Constants::LANGUAGECLIENT_SETTINGS_PAGE);
});
menu->popup(QCursor::pos());
});
}
static QHash<QWidget *, QPair<Client *, QAction *>> outlines;
if (outlines.contains(widget)) {
auto outline = outlines[widget];
if (outline.first != client
|| !LanguageClientOutlineWidgetFactory::clientSupportsDocumentSymbols(client,
document)) {
auto oldAction = outline.second;
widget->toolBar()->removeAction(oldAction);
delete oldAction;
outlines.remove(widget);
if (!extras->m_client || extras->m_client != client ||
!LanguageClientOutlineWidgetFactory::clientSupportsDocumentSymbols(client, document)) {
if (extras->m_outlineAction) {
widget->toolBar()->removeAction(extras->m_outlineAction);
delete extras->m_outlineAction;
}
extras->m_client.clear();
}
if (!outlines.contains(widget)) {
if (!extras->m_client) {
if (QWidget *comboBox = LanguageClientOutlineWidgetFactory::createComboBox(client, editor)) {
outlines[widget] = {client,
widget->insertExtraToolBarWidget(TextEditorWidget::Left, comboBox)};
extras->m_client = client;
extras->m_outlineAction = widget->insertExtraToolBarWidget(TextEditorWidget::Left,
comboBox);
}
}
}