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/*
* Copyright (c) 2020-2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibGUI/AutocompleteProvider.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Model.h>
#include <LibGUI/TableView.h>
#include <LibGUI/TextEditor.h>
#include <LibGUI/Window.h>
#include <LibGfx/Bitmap.h>
static RefPtr<Gfx::Bitmap> s_cpp_identifier_icon;
static RefPtr<Gfx::Bitmap> s_unspecified_identifier_icon;
namespace GUI {
class AutocompleteSuggestionModel final : public GUI::Model {
public:
explicit AutocompleteSuggestionModel(Vector<CodeComprehension::AutocompleteResultEntry>&& suggestions)
: m_suggestions(move(suggestions))
{
}
enum Column {
Icon,
Name,
__Column_Count,
};
enum InternalRole {
__ModelRoleCustom = (int)GUI::ModelRole::Custom,
PartialInputLength,
Completion,
HideAutocompleteAfterApplying,
};
virtual int row_count(const GUI::ModelIndex& = GUI::ModelIndex()) const override { return m_suggestions.size(); }
virtual int column_count(const GUI::ModelIndex& = GUI::ModelIndex()) const override { return Column::__Column_Count; }
virtual GUI::Variant data(const GUI::ModelIndex& index, GUI::ModelRole role) const override
{
auto& suggestion = m_suggestions.at(index.row());
if (role == GUI::ModelRole::Display) {
if (index.column() == Column::Name) {
if (!suggestion.display_text.is_empty())
return suggestion.display_text;
else
return suggestion.completion;
}
if (index.column() == Column::Icon) {
if (suggestion.language == CodeComprehension::Language::Cpp) {
if (!s_cpp_identifier_icon) {
s_cpp_identifier_icon = Gfx::Bitmap::try_load_from_file("/res/icons/16x16/completion/cpp-identifier.png"sv).release_value_but_fixme_should_propagate_errors();
}
return *s_cpp_identifier_icon;
}
if (suggestion.language == CodeComprehension::Language::Unspecified) {
if (!s_unspecified_identifier_icon) {
s_unspecified_identifier_icon = Gfx::Bitmap::try_load_from_file("/res/icons/16x16/completion/unspecified-identifier.png"sv).release_value_but_fixme_should_propagate_errors();
}
return *s_unspecified_identifier_icon;
}
return {};
}
}
if ((int)role == InternalRole::PartialInputLength)
return (i64)suggestion.partial_input_length;
if ((int)role == InternalRole::Completion)
return suggestion.completion;
if ((int)role == InternalRole::HideAutocompleteAfterApplying)
return suggestion.hide_autocomplete_after_applying == CodeComprehension::AutocompleteResultEntry::HideAutocompleteAfterApplying::Yes;
return {};
}
void set_suggestions(Vector<CodeComprehension::AutocompleteResultEntry>&& suggestions) { m_suggestions = move(suggestions); }
private:
Vector<CodeComprehension::AutocompleteResultEntry> m_suggestions;
};
AutocompleteBox::AutocompleteBox(TextEditor& editor)
: m_editor(editor)
{
m_popup_window = GUI::Window::construct(m_editor->window());
m_popup_window->set_window_type(GUI::WindowType::Tooltip);
m_popup_window->set_rect(0, 0, 175, 25);
auto& main_widget = m_popup_window->set_main_widget<GUI::Widget>();
main_widget.set_fill_with_background_color(true);
main_widget.set_layout<GUI::VerticalBoxLayout>();
m_suggestion_view = main_widget.add<GUI::TableView>();
m_suggestion_view->set_column_headers_visible(false);
m_suggestion_view->set_visible(false);
m_suggestion_view->on_activation = [&](GUI::ModelIndex const& index) {
if (!m_suggestion_view->model()->is_within_range(index))
return;
m_suggestion_view->selection().set(index);
m_suggestion_view->scroll_into_view(index, Orientation::Vertical);
apply_suggestion();
};
m_no_suggestions_view = main_widget.add<GUI::Label>("No suggestions");
}
void AutocompleteBox::update_suggestions(Vector<CodeComprehension::AutocompleteResultEntry>&& suggestions)
{
// FIXME: There's a potential race here if, after the user selected an autocomplete suggestion,
// the LanguageServer sends an update and this function is executed before AutocompleteBox::apply_suggestion()
// is executed.
bool has_suggestions = !suggestions.is_empty();
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_ref(*new AutocompleteSuggestionModel(move(suggestions))));
}
m_suggestion_view->model()->invalidate();
if (has_suggestions)
m_suggestion_view->set_cursor(m_suggestion_view->model()->index(0), GUI::AbstractView::SelectionUpdate::Set);
m_suggestion_view->set_visible(has_suggestions);
m_no_suggestions_view->set_visible(!has_suggestions);
m_popup_window->resize(has_suggestions ? Gfx::IntSize(300, 100) : Gfx::IntSize(175, 25));
m_suggestion_view->update();
}
bool AutocompleteBox::is_visible() const
{
return m_popup_window->is_visible();
}
void AutocompleteBox::show(Gfx::IntPoint suggestion_box_location)
{
if (!m_suggestion_view->model())
return;
m_popup_window->move_to(suggestion_box_location);
m_popup_window->show();
}
void AutocompleteBox::close()
{
m_popup_window->hide();
}
void AutocompleteBox::next_suggestion()
{
GUI::ModelIndex new_index = m_suggestion_view->selection().first();
if (new_index.is_valid())
new_index = m_suggestion_view->model()->index(new_index.row() + 1);
else
new_index = m_suggestion_view->model()->index(0);
if (m_suggestion_view->model()->is_within_range(new_index)) {
m_suggestion_view->selection().set(new_index);
m_suggestion_view->scroll_into_view(new_index, Orientation::Vertical);
}
}
void AutocompleteBox::previous_suggestion()
{
GUI::ModelIndex new_index = m_suggestion_view->selection().first();
if (new_index.is_valid())
new_index = m_suggestion_view->model()->index(new_index.row() - 1);
else
new_index = m_suggestion_view->model()->index(0);
if (m_suggestion_view->model()->is_within_range(new_index)) {
m_suggestion_view->selection().set(new_index);
m_suggestion_view->scroll_into_view(new_index, Orientation::Vertical);
}
}
CodeComprehension::AutocompleteResultEntry::HideAutocompleteAfterApplying AutocompleteBox::apply_suggestion()
{
auto hide_when_done = CodeComprehension::AutocompleteResultEntry::HideAutocompleteAfterApplying::Yes;
if (m_editor.is_null())
return hide_when_done;
if (!m_editor->is_editable())
return hide_when_done;
auto selected_index = m_suggestion_view->selection().first();
if (!selected_index.is_valid() || !m_suggestion_view->model()->is_within_range(selected_index))
return hide_when_done;
auto suggestion_index = m_suggestion_view->model()->index(selected_index.row());
auto completion = suggestion_index.data((GUI::ModelRole)AutocompleteSuggestionModel::InternalRole::Completion).to_string();
size_t partial_length = suggestion_index.data((GUI::ModelRole)AutocompleteSuggestionModel::InternalRole::PartialInputLength).to_i64();
auto hide_after_applying = suggestion_index.data((GUI::ModelRole)AutocompleteSuggestionModel::InternalRole::HideAutocompleteAfterApplying).to_bool();
if (!hide_after_applying)
hide_when_done = CodeComprehension::AutocompleteResultEntry::HideAutocompleteAfterApplying::No;
VERIFY(completion.length() >= partial_length);
if (!m_editor->has_selection()) {
auto cursor = m_editor->cursor();
VERIFY(m_editor->cursor().column() >= partial_length);
TextPosition start(cursor.line(), cursor.column() - partial_length);
auto end = cursor;
m_editor->delete_text_range(TextRange(start, end));
}
m_editor->insert_at_cursor_or_replace_selection(completion);
return hide_when_done;
}
}
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