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Assistant: Fix crash when activating empty search result

Browse source 
If there are no search results in the list, we shouldn't do anything
when you try to active the selected result, since there isn't one.

Fix this by using an Optional<size_t> to store the selected index.
This commit is contained in:
Andreas Kling 2021-06-29 13:08:21 +02:00
parent bec2b3086c
commit 9179a2ea73
1 changed files with 25 additions and 11 deletions
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36
Userland/Applications/Assistant/main.cpp
View file

@ -21,7 +21,7 @@
namespace Assistant {
struct AppState {
size_t selected_index { 0 };
Optional<size_t> selected_index;
Vector<NonnullRefPtr<Result>> results;
size_t visible_result_count { 0 };
@ -218,23 +218,34 @@ int main(int argc, char** argv)
db.search(text_box.text());
};
text_box.on_return_pressed = [&]() {
app_state.results[app_state.selected_index]->activate();
if (!app_state.selected_index.has_value())
return;
app_state.results[app_state.selected_index.value()]->activate();
exit(0);
};
text_box.on_up_pressed = [&]() {
if (app_state.selected_index == 0)
app_state.selected_index = app_state.visible_result_count - 1;
else if (app_state.selected_index > 0)
app_state.selected_index -= 1;
if (!app_state.visible_result_count)
return;
auto new_selected_index = app_state.selected_index.value_or(0);
if (new_selected_index == 0)
new_selected_index = app_state.visible_result_count - 1;
else if (new_selected_index > 0)
new_selected_index -= 1;
app_state.selected_index = new_selected_index;
mark_selected_item();
};
text_box.on_down_pressed = [&]() {
if ((app_state.visible_result_count - 1) == app_state.selected_index)
app_state.selected_index = 0;
else if (app_state.visible_result_count > app_state.selected_index)
app_state.selected_index += 1;
if (!app_state.visible_result_count)
return;
auto new_selected_index = app_state.selected_index.value_or(0);
if ((app_state.visible_result_count - 1) == new_selected_index)
new_selected_index = 0;
else if (app_state.visible_result_count > new_selected_index)
new_selected_index += 1;
app_state.selected_index = new_selected_index;
mark_selected_item();
};
text_box.on_escape_pressed = []() {
@ -242,7 +253,10 @@ int main(int argc, char** argv)
};
db.on_new_results = [&](auto results) {
app_state.selected_index = 0;
if (results.is_empty())
app_state.selected_index = {};
else
app_state.selected_index = 0;
app_state.results = results;
app_state.visible_result_count = min(results.size(), MAX_SEARCH_RESULTS);
results_container.remove_all_children();