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serenity/Userland/Applications/PDFViewer/OutlineModel.cpp
Rodrigo Tobar 2ea8d2547e PDFViewer: Propagate errors from OutlineModel construction
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.
2022-12-17 19:40:52 +01:00

101 lines
3.1 KiB
C++

/*
* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "OutlineModel.h"
#include <LibGfx/Font/FontDatabase.h>
ErrorOr<NonnullRefPtr<OutlineModel>> OutlineModel::create(NonnullRefPtr<PDF::OutlineDict> const& outline)
{
auto outline_model = adopt_ref(*new OutlineModel(outline));
outline_model->m_closed_item_icon.set_bitmap_for_size(16, TRY(Gfx::Bitmap::try_load_from_file("/res/icons/16x16/book.png"sv)));
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)));
return outline_model;
}
OutlineModel::OutlineModel(NonnullRefPtr<PDF::OutlineDict> const& outline)
: m_outline(outline)
{
}
void OutlineModel::set_index_open_state(const GUI::ModelIndex& index, bool is_open)
{
VERIFY(index.is_valid());
auto* outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
if (is_open) {
m_open_outline_items.set(outline_item);
} else {
m_open_outline_items.remove(outline_item);
}
}
int OutlineModel::row_count(const GUI::ModelIndex& index) const
{
if (!index.is_valid())
return m_outline->children.size();
auto outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
return static_cast<int>(outline_item->children.size());
}
int OutlineModel::column_count(const GUI::ModelIndex&) const
{
return 1;
}
GUI::Variant OutlineModel::data(const GUI::ModelIndex& index, GUI::ModelRole role) const
{
VERIFY(index.is_valid());
auto outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
switch (role) {
case GUI::ModelRole::Display:
return outline_item->title;
case GUI::ModelRole::Icon:
if (m_open_outline_items.contains(outline_item))
return m_open_item_icon;
return m_closed_item_icon;
default:
return {};
}
}
GUI::ModelIndex OutlineModel::parent_index(const GUI::ModelIndex& index) const
{
if (!index.is_valid())
return {};
auto* outline_item = static_cast<PDF::OutlineItem*>(index.internal_data());
auto& parent = outline_item->parent;
if (!parent)
return {};
if (parent->parent) {
auto& grandparent = parent->parent;
for (size_t i = 0; i < grandparent->children.size(); i++) {
auto* sibling = &grandparent->children[i];
if (sibling == index.internal_data())
return create_index(static_cast<int>(i), 0, sibling);
}
} else {
for (size_t i = 0; i < m_outline->children.size(); i++) {
auto* sibling = &m_outline->children[i];
if (sibling == index.internal_data())
return create_index(static_cast<int>(i), 0, sibling);
}
}
VERIFY_NOT_REACHED();
}
GUI::ModelIndex OutlineModel::index(int row, int column, const GUI::ModelIndex& parent) const
{
if (!parent.is_valid())
return create_index(row, column, &m_outline->children[row]);
auto parent_outline_item = static_cast<PDF::OutlineItem*>(parent.internal_data());
return create_index(row, column, &parent_outline_item->children[row]);
}