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ladybird/Userland/Libraries/LibGUI/FontPicker.cpp
Andreas Kling 235f39e449 LibGfx: Use ErrorOr<T> for Bitmap::try_load_from_file() 
This was used in a lot of places, so this patch makes liberal use of
ErrorOr<T>::release_value_but_fixme_should_propagate_errors().
2021-11-08 00:35:27 +01:00

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/*
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/QuickSort.h>
#include <LibGUI/Button.h>
#include <LibGUI/FontPicker.h>
#include <LibGUI/FontPickerDialogGML.h>
#include <LibGUI/ItemListModel.h>
#include <LibGUI/Label.h>
#include <LibGUI/ListView.h>
#include <LibGUI/SpinBox.h>
#include <LibGUI/Widget.h>
#include <LibGfx/FontDatabase.h>
namespace GUI {
FontPicker::FontPicker(Window* parent_window, const Gfx::Font* current_font, bool fixed_width_only)
: Dialog(parent_window)
, m_fixed_width_only(fixed_width_only)
{
set_title("Font picker");
resize(430, 280);
set_icon(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/app-font-editor.png").release_value_but_fixme_should_propagate_errors());
auto& widget = set_main_widget<GUI::Widget>();
if (!widget.load_from_gml(font_picker_dialog_gml))
VERIFY_NOT_REACHED();
m_family_list_view = *widget.find_descendant_of_type_named<ListView>("family_list_view");
m_family_list_view->set_model(ItemListModel<String>::create(m_families));
m_family_list_view->horizontal_scrollbar().set_visible(false);
m_variant_list_view = *widget.find_descendant_of_type_named<ListView>("variant_list_view");
m_variant_list_view->set_model(ItemListModel<String>::create(m_variants));
m_variant_list_view->horizontal_scrollbar().set_visible(false);
m_size_spin_box = *widget.find_descendant_of_type_named<SpinBox>("size_spin_box");
m_size_spin_box->set_range(1, 255);
m_size_list_view = *widget.find_descendant_of_type_named<ListView>("size_list_view");
m_size_list_view->set_model(ItemListModel<int>::create(m_sizes));
m_size_list_view->horizontal_scrollbar().set_visible(false);
m_sample_text_label = *widget.find_descendant_of_type_named<Label>("sample_text_label");
m_families.clear();
Gfx::FontDatabase::the().for_each_typeface([&](auto& typeface) {
if (m_fixed_width_only && !typeface.is_fixed_width())
return;
if (!m_families.contains_slow(typeface.family()))
m_families.append(typeface.family());
});
quick_sort(m_families);
m_family_list_view->on_selection_change = [this] {
const auto& index = m_family_list_view->selection().first();
m_family = index.data().to_string();
m_variants.clear();
Gfx::FontDatabase::the().for_each_typeface([&](auto& typeface) {
if (m_fixed_width_only && !typeface.is_fixed_width())
return;
if (typeface.family() == m_family.value() && !m_variants.contains_slow(typeface.variant()))
m_variants.append(typeface.variant());
});
quick_sort(m_variants);
Optional<size_t> index_of_old_variant_in_new_list;
if (m_variant.has_value())
index_of_old_variant_in_new_list = m_variants.find_first_index(m_variant.value());
m_variant_list_view->model()->invalidate();
m_variant_list_view->set_cursor(m_variant_list_view->model()->index(index_of_old_variant_in_new_list.value_or(0)), GUI::AbstractView::SelectionUpdate::Set);
update_font();
};
m_variant_list_view->on_selection_change = [this] {
const auto& index = m_variant_list_view->selection().first();
bool font_is_fixed_size = false;
m_variant = index.data().to_string();
m_sizes.clear();
Gfx::FontDatabase::the().for_each_typeface([&](auto& typeface) {
if (m_fixed_width_only && !typeface.is_fixed_width())
return;
if (typeface.family() == m_family.value() && typeface.variant() == m_variant.value()) {
font_is_fixed_size = typeface.is_fixed_size();
if (font_is_fixed_size) {
m_size_spin_box->set_visible(false);
typeface.for_each_fixed_size_font([&](auto& font) {
m_sizes.append(font.presentation_size());
});
} else {
m_size_spin_box->set_visible(true);
m_sizes.append(8);
m_sizes.append(10);
m_sizes.append(12);
m_sizes.append(14);
m_sizes.append(16);
m_sizes.append(18);
m_sizes.append(20);
m_sizes.append(22);
m_sizes.append(24);
m_sizes.append(36);
}
}
});
quick_sort(m_sizes);
m_size_list_view->model()->invalidate();
m_size_list_view->set_selection_mode(GUI::AbstractView::SelectionMode::SingleSelection);
if (m_size.has_value()) {
Optional<size_t> index_of_old_size_in_new_list = m_sizes.find_first_index(m_size.value());
if (index_of_old_size_in_new_list.has_value()) {
m_size_list_view->set_cursor(m_size_list_view->model()->index(index_of_old_size_in_new_list.value()), GUI::AbstractView::SelectionUpdate::Set);
} else {
if (font_is_fixed_size) {
m_size_list_view->set_cursor(m_size_list_view->model()->index(0), GUI::AbstractView::SelectionUpdate::Set);
} else {
m_size_list_view->set_selection_mode(GUI::AbstractView::SelectionMode::NoSelection);
m_size_spin_box->set_value(m_size.value());
}
}
} else {
m_size_list_view->set_cursor(m_size_list_view->model()->index(0), GUI::AbstractView::SelectionUpdate::Set);
}
update_font();
};
m_size_list_view->on_selection_change = [this] {
const auto& index = m_size_list_view->selection().first();
auto size = index.data().to_i32();
Optional<size_t> index_of_new_size_in_list = m_sizes.find_first_index(size);
if (index_of_new_size_in_list.has_value()) {
m_size_list_view->set_selection_mode(GUI::AbstractView::SelectionMode::SingleSelection);
m_size = size;
m_size_spin_box->set_value(m_size.value());
}
update_font();
};
m_size_spin_box->on_change = [this](int value) {
m_size = value;
Optional<size_t> index_of_new_size_in_list = m_sizes.find_first_index(m_size.value());
if (index_of_new_size_in_list.has_value()) {
m_size_list_view->set_selection_mode(GUI::AbstractView::SelectionMode::SingleSelection);
m_size_list_view->set_cursor(m_size_list_view->model()->index(index_of_new_size_in_list.value()), GUI::AbstractView::SelectionUpdate::Set);
} else {
m_size_list_view->set_selection_mode(GUI::AbstractView::SelectionMode::NoSelection);
}
update_font();
};
auto& ok_button = *widget.find_descendant_of_type_named<GUI::Button>("ok_button");
ok_button.on_click = [this](auto) {
done(ExecOK);
};
auto& cancel_button = *widget.find_descendant_of_type_named<GUI::Button>("cancel_button");
cancel_button.on_click = [this](auto) {
done(ExecCancel);
};
set_font(current_font);
}
FontPicker::~FontPicker()
{
}
void FontPicker::set_font(const Gfx::Font* font)
{
if (m_font == font)
return;
m_font = font;
m_sample_text_label->set_font(m_font);
if (!m_font) {
m_family = {};
m_variant = {};
m_size = {};
m_variants.clear();
m_sizes.clear();
m_variant_list_view->model()->invalidate();
m_size_list_view->model()->invalidate();
return;
}
m_family = font->family();
m_variant = font->variant();
m_size = font->presentation_size();
auto family_index = m_families.find_first_index(m_font->family());
if (family_index.has_value())
m_family_list_view->set_cursor(m_family_list_view->model()->index(family_index.value()), GUI::AbstractView::SelectionUpdate::Set);
auto variant_index = m_variants.find_first_index(m_font->variant());
if (variant_index.has_value())
m_variant_list_view->set_cursor(m_variant_list_view->model()->index(variant_index.value()), GUI::AbstractView::SelectionUpdate::Set);
auto size_index = m_sizes.find_first_index(m_font->presentation_size());
if (size_index.has_value())
m_size_list_view->set_cursor(m_size_list_view->model()->index(size_index.value()), GUI::AbstractView::SelectionUpdate::Set);
}
void FontPicker::update_font()
{
if (m_family.has_value() && m_size.has_value() && m_variant.has_value()) {
m_font = Gfx::FontDatabase::the().get(m_family.value(), m_variant.value(), m_size.value());
m_sample_text_label->set_font(m_font);
}
}
}
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