1 /*
2 * Copyright (C) 2008, Pino Toscano <pino@kde.org>
3 * Copyright (C) 2018, Adam Reichold <adam.reichold@t-online.de>
4 * Copyright (C) 2019, Albert Astals Cid <aacid@kde.org>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2, or (at your option)
9 * any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
19 */
20
21 #include "toc.h"
22
23 #include <poppler-qt5.h>
24
25 #include <QtGui/QStandardItemModel>
26 #include <QtWidgets/QHeaderView>
27 #include <QtWidgets/QTreeWidget>
28
29 #include <QDebug>
30
31 struct Node
32 {
NodeNode33 Node(Poppler::OutlineItem &&item, int row, Node *parent) : m_row(row), m_parent(parent), m_item(std::move(item)) { }
34
~NodeNode35 ~Node() { qDeleteAll(m_children); }
36
37 Node(const Node &) = delete;
38 Node &operator=(const Node &) = delete;
39
40 int m_row;
41 Node *m_parent;
42 Poppler::OutlineItem m_item;
43 QVector<Node *> m_children;
44 };
45
46 class TocModel : public QAbstractItemModel
47 {
48 Q_OBJECT
49 public:
TocModel(QVector<Poppler::OutlineItem> && items,QObject * parent)50 TocModel(QVector<Poppler::OutlineItem> &&items, QObject *parent) : QAbstractItemModel(parent)
51 {
52 for (int i = 0; i < items.count(); ++i) {
53 m_topItems << new Node(std::move(items[i]), i, nullptr);
54 }
55 }
56
~TocModel()57 ~TocModel() override { qDeleteAll(m_topItems); }
58
data(const QModelIndex & index,int role) const59 QVariant data(const QModelIndex &index, int role) const override
60 {
61 if (role != Qt::DisplayRole)
62 return {};
63
64 Node *n = static_cast<Node *>(index.internalPointer());
65 return n->m_item.name();
66 }
67
index(int row,int column,const QModelIndex & parent) const68 QModelIndex index(int row, int column, const QModelIndex &parent) const override
69 {
70 Node *p = static_cast<Node *>(parent.internalPointer());
71 const QVector<Node *> &children = p ? p->m_children : m_topItems;
72
73 return createIndex(row, column, children[row]);
74 }
75
parent(const QModelIndex & child) const76 QModelIndex parent(const QModelIndex &child) const override
77 {
78 Node *n = static_cast<Node *>(child.internalPointer());
79 if (n->m_parent == nullptr)
80 return QModelIndex();
81 else
82 return createIndex(n->m_parent->m_row, 0, n->m_parent);
83 }
84
rowCount(const QModelIndex & parent) const85 int rowCount(const QModelIndex &parent) const override
86 {
87 Node *n = static_cast<Node *>(parent.internalPointer());
88 if (!n) {
89 return m_topItems.count();
90 }
91
92 if (n->m_children.isEmpty() && !n->m_item.isNull()) {
93 QVector<Poppler::OutlineItem> items = n->m_item.children();
94 for (int i = 0; i < items.count(); ++i) {
95 n->m_children << new Node(std::move(items[i]), i, n);
96 }
97 }
98
99 return n->m_children.count();
100 }
101
hasChildren(const QModelIndex & parent) const102 bool hasChildren(const QModelIndex &parent) const override
103 {
104 Node *n = static_cast<Node *>(parent.internalPointer());
105 if (!n)
106 return true;
107
108 return n->m_item.hasChildren();
109 }
110
columnCount(const QModelIndex & parent) const111 int columnCount(const QModelIndex &parent) const override { return 1; }
112
113 private:
114 QVector<Node *> m_topItems;
115 };
116
TocDock(QWidget * parent)117 TocDock::TocDock(QWidget *parent) : AbstractInfoDock(parent)
118 {
119 m_tree = new QTreeView(this);
120 setWidget(m_tree);
121 m_tree->setAlternatingRowColors(true);
122 m_tree->header()->hide();
123 setWindowTitle(tr("TOC"));
124 m_tree->setHorizontalScrollMode(QAbstractItemView::ScrollPerPixel);
125 }
126
~TocDock()127 TocDock::~TocDock() { }
128
expandItemModels(const QModelIndex & parent)129 void TocDock::expandItemModels(const QModelIndex &parent)
130 {
131 TocModel *model = static_cast<TocModel *>(m_tree->model());
132 for (int i = 0; i < model->rowCount(parent); ++i) {
133 QModelIndex index = model->index(i, 0, parent);
134 Node *n = static_cast<Node *>(index.internalPointer());
135 if (n->m_item.isOpen()) {
136 m_tree->setExpanded(index, true);
137 expandItemModels(index);
138 }
139 }
140 }
141
fillInfo()142 void TocDock::fillInfo()
143 {
144 auto outline = document()->outline();
145 if (!outline.isEmpty()) {
146 TocModel *model = new TocModel(std::move(outline), this);
147 m_tree->setModel(model);
148
149 expandItemModels(QModelIndex());
150 } else {
151 QStandardItemModel *model = new QStandardItemModel(this);
152 QStandardItem *item = new QStandardItem(tr("No TOC"));
153 item->setFlags(item->flags() & ~Qt::ItemIsEnabled);
154 model->appendRow(item);
155 m_tree->setModel(model);
156 }
157 }
158
documentClosed()159 void TocDock::documentClosed()
160 {
161 m_tree->setModel(nullptr);
162 AbstractInfoDock::documentClosed();
163 }
164
165 #include "toc.moc"
166