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/*
* Copyright (C) 2008, Pino Toscano <[email protected]>
* Copyright (C) 2018, Adam Reichold <[email protected]>
* Copyright (C) 2019, Albert Astals Cid <[email protected]>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "toc.h"
#include <poppler-qt6.h>
#include <QtGui/QStandardItemModel>
#include <QtWidgets/QHeaderView>
#include <QtWidgets/QTreeWidget>
#include <QDebug>
struct Node
{
Node(Poppler::OutlineItem &&item, int row, Node *parent) : m_row(row), m_parent(parent), m_item(std::move(item)) { }
~Node() { qDeleteAll(m_children); }
Node(const Node &) = delete;
Node &operator=(const Node &) = delete;
int m_row;
Node *m_parent;
Poppler::OutlineItem m_item;
QVector<Node *> m_children;
};
class TocModel : public QAbstractItemModel
{
Q_OBJECT
public:
TocModel(QVector<Poppler::OutlineItem> &&items, QObject *parent) : QAbstractItemModel(parent)
{
for (int i = 0; i < items.count(); ++i) {
m_topItems << new Node(std::move(items[i]), i, nullptr);
}
}
~TocModel() override { qDeleteAll(m_topItems); }
QVariant data(const QModelIndex &index, int role) const override
{
if (role != Qt::DisplayRole) {
return {};
}
Node *n = static_cast<Node *>(index.internalPointer());
return n->m_item.name();
}
QModelIndex index(int row, int column, const QModelIndex &parent) const override
{
Node *p = static_cast<Node *>(parent.internalPointer());
const QVector<Node *> &children = p ? p->m_children : m_topItems;
return createIndex(row, column, children[row]);
}
QModelIndex parent(const QModelIndex &child) const override
{
Node *n = static_cast<Node *>(child.internalPointer());
if (n->m_parent == nullptr) {
return QModelIndex();
} else {
return createIndex(n->m_parent->m_row, 0, n->m_parent);
}
}
int rowCount(const QModelIndex &parent) const override
{
Node *n = static_cast<Node *>(parent.internalPointer());
if (!n) {
return m_topItems.count();
}
if (n->m_children.isEmpty() && !n->m_item.isNull()) {
QVector<Poppler::OutlineItem> items = n->m_item.children();
for (int i = 0; i < items.count(); ++i) {
n->m_children << new Node(std::move(items[i]), i, n);
}
}
return n->m_children.count();
}
bool hasChildren(const QModelIndex &parent) const override
{
Node *n = static_cast<Node *>(parent.internalPointer());
if (!n) {
return true;
}
return n->m_item.hasChildren();
}
int columnCount(const QModelIndex &parent) const override { return 1; }
private:
QVector<Node *> m_topItems;
};
TocDock::TocDock(QWidget *parent) : AbstractInfoDock(parent)
{
m_tree = new QTreeView(this);
setWidget(m_tree);
m_tree->setAlternatingRowColors(true);
m_tree->header()->hide();
setWindowTitle(tr("TOC"));
m_tree->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
}
TocDock::~TocDock() { }
void TocDock::expandItemModels(const QModelIndex &parent)
{
TocModel *model = static_cast<TocModel *>(m_tree->model());
for (int i = 0; i < model->rowCount(parent); ++i) {
QModelIndex index = model->index(i, 0, parent);
Node *n = static_cast<Node *>(index.internalPointer());
if (n->m_item.isOpen()) {
m_tree->setExpanded(index, true);
expandItemModels(index);
}
}
}
void TocDock::fillInfo()
{
auto outline = document()->outline();
if (!outline.isEmpty()) {
TocModel *model = new TocModel(std::move(outline), this);
m_tree->setModel(model);
expandItemModels(QModelIndex());
} else {
QStandardItemModel *model = new QStandardItemModel(this);
QStandardItem *item = new QStandardItem(tr("No TOC"));
item->setFlags(item->flags() & ~Qt::ItemIsEnabled);
model->appendRow(item);
m_tree->setModel(model);
}
}
void TocDock::documentClosed()
{
m_tree->setModel(nullptr);
AbstractInfoDock::documentClosed();
}
#include "toc.moc"
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