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https://github.com/RGBCube/serenity
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2ea8d2547e
This follows the same idea that Andreas was doing in this latest videos, where construction-time TRY()s were not present but should have been. Like Andreas did, moving the initialisation of such fields to the factory function, which then returns ErrorOr solves the issue.
101 lines
3.1 KiB
C++
101 lines
3.1 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "OutlineModel.h"
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#include <LibGfx/Font/FontDatabase.h>
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ErrorOr<NonnullRefPtr<OutlineModel>> OutlineModel::create(NonnullRefPtr<PDF::OutlineDict> const& outline)
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{
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auto outline_model = adopt_ref(*new OutlineModel(outline));
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outline_model->m_closed_item_icon.set_bitmap_for_size(16, TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/book.png"sv)));
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outline_model->m_open_item_icon.set_bitmap_for_size(16, TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/book-open.png"sv)));
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return outline_model;
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}
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OutlineModel::OutlineModel(NonnullRefPtr<PDF::OutlineDict> const& outline)
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: m_outline(outline)
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{
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}
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void OutlineModel::set_index_open_state(const GUI::ModelIndex& index, bool is_open)
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{
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VERIFY(index.is_valid());
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auto* outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
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if (is_open) {
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m_open_outline_items.set(outline_item);
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} else {
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m_open_outline_items.remove(outline_item);
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}
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}
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int OutlineModel::row_count(const GUI::ModelIndex& index) const
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{
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if (!index.is_valid())
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return m_outline->children.size();
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auto outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
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return static_cast<int>(outline_item->children.size());
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}
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int OutlineModel::column_count(const GUI::ModelIndex&) const
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{
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return 1;
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}
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GUI::Variant OutlineModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
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{
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VERIFY(index.is_valid());
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auto outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
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switch (role) {
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case GUI::ModelRole::Display:
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return outline_item->title;
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case GUI::ModelRole::Icon:
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if (m_open_outline_items.contains(outline_item))
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return m_open_item_icon;
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return m_closed_item_icon;
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default:
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return {};
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}
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}
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GUI::ModelIndex OutlineModel::parent_index(const GUI::ModelIndex& index) const
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{
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if (!index.is_valid())
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return {};
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auto* outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
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auto& parent = outline_item->parent;
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if (!parent)
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return {};
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if (parent->parent) {
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auto& grandparent = parent->parent;
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for (size_t i = 0; i < grandparent->children.size(); i++) {
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auto* sibling = &grandparent->children[i];
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if (sibling == index.internal_data())
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return create_index(static_cast<int>(i), 0, sibling);
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}
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} else {
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for (size_t i = 0; i < m_outline->children.size(); i++) {
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auto* sibling = &m_outline->children[i];
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if (sibling == index.internal_data())
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return create_index(static_cast<int>(i), 0, sibling);
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}
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}
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VERIFY_NOT_REACHED();
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}
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GUI::ModelIndex OutlineModel::index(int row, int column, const GUI::ModelIndex& parent) const
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{
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if (!parent.is_valid())
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return create_index(row, column, &m_outline->children[row]);
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auto parent_outline_item = static_cast<PDF::OutlineItem*>(parent.internal_data());
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return create_index(row, column, &parent_outline_item->children[row]);
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}
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