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CharacterMap: Add a find-by-name window

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This works the same way as the command-line usage, searching against the
display name as provided by LibUnicode.

I've modified the search loop to cover every possible unicode
code-point, since my previous logic was flawed. Code-points are not
dense, there are gaps, so simply iterating up to the count of them will
skip ones with higher values. Surprisingly, iterating all 1,114,112 of
them still runs in a third of a second. Computers are fast!
This commit is contained in:
Sam Atkins 2022-01-12 16:12:59 +00:00 • committed by Andreas Kling
parent 2bf7abcb28
commit 2a7c638cd9
8 changed files with 202 additions and 24 deletions
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91
Userland/Applications/CharacterMap/CharacterSearchWidget.cpp Normal file
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/*
* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "CharacterSearchWidget.h"
#include "SearchCharacters.h"
#include <Applications/CharacterMap/CharacterSearchWindowGML.h>
struct SearchResult {
u32 code_point;
String display_text;
};
class CharacterSearchModel final : public GUI::Model {
public:
CharacterSearchModel() { }
int row_count(GUI::ModelIndex const&) const override { return m_data.size(); }
int column_count(GUI::ModelIndex const&) const override { return 1; }
GUI::Variant data(GUI::ModelIndex const& index, GUI::ModelRole role) const override
{
auto& result = m_data.at(index.row());
if (role == GUI::ModelRole::Display)
return result.display_text;
if (role == GUI::ModelRole::Custom)
return result.code_point;
return {};
}
void clear()
{
m_data.clear();
invalidate();
}
void add_result(SearchResult result)
{
m_data.append(move(result));
invalidate();
}
private:
Vector<SearchResult> m_data;
};
CharacterSearchWidget::CharacterSearchWidget()
{
load_from_gml(character_search_window_gml);
m_search_input = find_descendant_of_type_named<GUI::TextBox>("search_input");
m_search_button = find_descendant_of_type_named<GUI::Button>("search_button");
m_results_list = find_descendant_of_type_named<GUI::ListView>("results_list");
m_search_input->on_return_pressed = [this] { search(); };
m_search_button->on_click = [this](auto) { search(); };
m_results_list->horizontal_scrollbar().set_visible(false);
m_results_list->set_model(adopt_ref(*new CharacterSearchModel()));
m_results_list->on_activation = [&](GUI::ModelIndex const& index) {
auto& model = static_cast<CharacterSearchModel&>(*m_results_list->model());
auto code_point = model.data(index, GUI::ModelRole::Custom).as_u32();
if (on_character_selected)
on_character_selected(code_point);
};
}
CharacterSearchWidget::~CharacterSearchWidget()
{
}
void CharacterSearchWidget::search()
{
// TODO: Sort the results nicely. They're sorted by code-point for now, which is easy, but not the most useful.
// Sorting intelligently in a style similar to Assistant would be nicer.
auto& model = static_cast<CharacterSearchModel&>(*m_results_list->model());
model.clear();
auto query = m_search_input->text();
if (query.is_empty())
return;
for_each_character_containing(query, [&](auto code_point, auto& display_name) {
StringBuilder builder;
builder.append_code_point(code_point);
builder.append(" - ");
builder.append(display_name);
model.add_result({ code_point, builder.to_string() });
});
}