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LibGUI: Add an optional "automatic" autocomplete feature to TextEditor

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This aims to be a "smart" autocomplete that tries to present the user
with useful suggestions without being in the way (too much).
Here is its current configuration:
- Show suggestions 800ms after something is inserted in the editor
- if something else is inserted in that period, reset it back to 800ms
  to allow the user to type uninterrupted
- cancel any shown autocomplete (and the timer) on external changes
  (paste, cut, etc)
This commit is contained in:
AnotherTest 2021-01-01 17:29:11 +03:30 • committed by Andreas Kling
parent 60f5f48dd1
commit a4a238ddc8
3 changed files with 75 additions and 12 deletions
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26
Libraries/LibGUI/AutocompleteProvider.cpp
View file

@ -92,6 +92,8 @@ public:
}
virtual void update() override {};
void set_suggestions(Vector<AutocompleteProvider::Entry>&& suggestions) { m_suggestions = move(suggestions); }
private:
Vector<AutocompleteProvider::Entry> m_suggestions;
};
@ -111,16 +113,21 @@ AutocompleteBox::AutocompleteBox(TextEditor& editor)
void AutocompleteBox::update_suggestions(Vector<AutocompleteProvider::Entry>&& suggestions)
{
if (suggestions.is_empty())
return;
bool has_suggestions = !suggestions.is_empty();
m_suggestion_view->set_model(adopt(*new AutocompleteSuggestionModel(move(suggestions))));
if (m_suggestion_view->model()) {
auto& model = *static_cast<AutocompleteSuggestionModel*>(m_suggestion_view->model());
model.set_suggestions(move(suggestions));
} else {
m_suggestion_view->set_model(adopt(*new AutocompleteSuggestionModel(move(suggestions))));
m_suggestion_view->update();
if (has_suggestions)
m_suggestion_view->set_cursor(m_suggestion_view->model()->index(0), GUI::AbstractView::SelectionUpdate::Set);
}
m_suggestion_view->model()->update();
m_suggestion_view->update();
if (!has_suggestions)
m_suggestion_view->selection().clear();
else
m_suggestion_view->selection().set(m_suggestion_view->model()->index(0));
close();
}
bool AutocompleteBox::is_visible() const
@ -130,7 +137,12 @@ bool AutocompleteBox::is_visible() const
void AutocompleteBox::show(Gfx::IntPoint suggstion_box_location)
{
if (!m_suggestion_view->model() || m_suggestion_view->model()->row_count() == 0)
return;
m_popup_window->move_to(suggstion_box_location);
if (!is_visible())
m_suggestion_view->move_cursor(GUI::AbstractView::CursorMovement::Home, GUI::AbstractTableView::SelectionUpdate::Set);
m_popup_window->show();
}