pv/subwindows/decoder_selector/subwindow.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2018 Soeren Apel <soeren@apelpie.net>
   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 of the License, or
   9  * (at your option) 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <algorithm>
  21
  22 #include <QApplication>
  23 #include <QDebug>
  24 #include <QFontMetrics>
  25 #include <QInputDialog>
  26 #include <QLabel>
  27 #include <QLineEdit>
  28 #include <QPushButton>
  29 #include <QScrollArea>
  30 #include <QVBoxLayout>
  31
  32 #include "pv/session.hpp"
  33 #include "pv/subwindows/decoder_selector/subwindow.hpp"
  34
  35 using std::reverse;
  36 using std::shared_ptr;
  37
  38 namespace pv {
  39 namespace subwindows {
  40 namespace decoder_selector {
  41
  42 const QString initial_notice = QApplication::tr("Select a decoder to see its description here.");
  43 const int min_width_margin = 75;
  44
  45
  46 bool QCustomSortFilterProxyModel::filterAcceptsRow(int source_row,
  47         const QModelIndex& source_parent) const
  48 {
  49         // Search model recursively
  50
  51         if (QSortFilterProxyModel::filterAcceptsRow(source_row, source_parent))
  52                 return true;
  53
  54         const QModelIndex index = sourceModel()->index(source_row, 0, source_parent);
  55
  56         for (int i = 0; i < sourceModel()->rowCount(index); i++)
  57                 if (filterAcceptsRow(i, index))
  58                         return true;
  59
  60         return false;
  61 }
  62
  63
  64 void QCustomTreeView::currentChanged(const QModelIndex& current,
  65         const QModelIndex& previous)
  66 {
  67         QTreeView::currentChanged(current, previous);
  68         currentChanged(current);
  69 }
  70
  71
  72 SubWindow::SubWindow(Session& session, QWidget* parent) :
  73         SubWindowBase(session, parent),
  74         splitter_(new QSplitter()),
  75         tree_view_(new QCustomTreeView()),
  76         info_box_(new QWidget()),
  77         info_label_header_(new QLabel()),
  78         info_label_body_(new QLabel()),
  79         info_label_footer_(new QLabel()),
  80         model_(new DecoderCollectionModel()),
  81         sort_filter_model_(new QCustomSortFilterProxyModel())
  82 {
  83         QVBoxLayout* root_layout = new QVBoxLayout(this);
  84         root_layout->setContentsMargins(0, 0, 0, 0);
  85         root_layout->addWidget(splitter_);
  86
  87         QWidget* upper_container = new QWidget();
  88         QVBoxLayout* upper_layout = new QVBoxLayout(upper_container);
  89         upper_layout->setContentsMargins(0, 5, 0, 0);
  90         QLineEdit* filter = new QLineEdit();
  91         upper_layout->addWidget(filter);
  92         upper_layout->addWidget(tree_view_);
  93
  94         splitter_->setOrientation(Qt::Vertical);
  95         splitter_->addWidget(upper_container);
  96         splitter_->addWidget(info_box_);
  97
  98         const QIcon filter_icon(QIcon::fromTheme("search",
  99                 QIcon(":/icons/search.svg")));
 100         filter->setClearButtonEnabled(true);
 101         filter->addAction(filter_icon, QLineEdit::LeadingPosition);
 102
 103         sort_filter_model_->setSourceModel(model_);
 104         sort_filter_model_->setFilterCaseSensitivity(Qt::CaseInsensitive);
 105
 106         tree_view_->setModel(sort_filter_model_);
 107         tree_view_->setRootIsDecorated(true);
 108         tree_view_->setSortingEnabled(true);
 109         tree_view_->sortByColumn(0, Qt::AscendingOrder);
 110
 111         // Hide the columns that hold the detailed item information
 112         tree_view_->hideColumn(2);  // ID
 113
 114         // Ensure that all decoder tag names are fully visible by default
 115         tree_view_->resizeColumnToContents(0);
 116
 117         tree_view_->setIndentation(10);
 118
 119         QScrollArea* info_label_body_container = new QScrollArea();
 120         info_label_body_container->setWidget(info_label_body_);
 121         info_label_body_container->setWidgetResizable(true);
 122
 123         info_box_->setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding);
 124         QVBoxLayout* info_box_layout = new QVBoxLayout(info_box_);
 125         info_box_layout->addWidget(info_label_header_);
 126         info_box_layout->addWidget(info_label_body_container);
 127         info_box_layout->addWidget(info_label_footer_);
 128         info_box_layout->setAlignment(Qt::AlignTop);
 129         Qt::TextInteractionFlags flags = Qt::TextSelectableByMouse | Qt::TextSelectableByKeyboard;
 130         info_label_header_->setWordWrap(true);
 131         info_label_header_->setTextInteractionFlags(flags);
 132         info_label_body_->setWordWrap(true);
 133         info_label_body_->setTextInteractionFlags(flags);
 134         info_label_body_->setText(initial_notice);
 135         info_label_footer_->setWordWrap(true);
 136         info_label_footer_->setTextInteractionFlags(flags);
 137
 138         connect(filter, SIGNAL(textChanged(const QString&)),
 139                 this, SLOT(on_filter_changed(const QString&)));
 140
 141         connect(tree_view_, SIGNAL(currentChanged(const QModelIndex&)),
 142                 this, SLOT(on_item_changed(const QModelIndex&)));
 143         connect(tree_view_, SIGNAL(activated(const QModelIndex&)),
 144                 this, SLOT(on_item_activated(const QModelIndex&)));
 145
 146         connect(this, SIGNAL(new_decoders_selected(vector<const srd_decoder*>)),
 147                 &session, SLOT(on_new_decoders_selected(vector<const srd_decoder*>)));
 148 }
 149
 150 bool SubWindow::has_toolbar() const
 151 {
 152         return true;
 153 }
 154
 155 QToolBar* SubWindow::create_toolbar(QWidget *parent) const
 156 {
 157         QToolBar* toolbar = new QToolBar(parent);
 158
 159         return toolbar;
 160 }
 161
 162 int SubWindow::minimum_width() const
 163 {
 164         QFontMetrics m(info_label_body_->font());
 165         const int label_width = m.width(initial_notice);
 166
 167         return label_width + min_width_margin;
 168 }
 169
 170 vector<const char*> SubWindow::get_decoder_inputs(const srd_decoder* d) const
 171 {
 172         vector<const char*> ret_val;
 173
 174         for (GSList* li = d->inputs; li; li = li->next)
 175                 ret_val.push_back((const char*)li->data);
 176
 177         return ret_val;
 178 }
 179
 180 vector<const srd_decoder*> SubWindow::get_decoders_providing(const char* output) const
 181 {
 182         vector<const srd_decoder*> ret_val;
 183
 184         for (GSList* li = (GSList*)srd_decoder_list(); li; li = li->next) {
 185                 const srd_decoder* d = (srd_decoder*)li->data;
 186                 assert(d);
 187
 188                 if (!d->outputs)
 189                         continue;
 190
 191                 // TODO For now we ignore that d->outputs is actually a list
 192                 if (strncmp((char*)(d->outputs->data), output, strlen(output)) == 0)
 193                         ret_val.push_back(d);
 194         }
 195
 196         return ret_val;
 197 }
 198
 199 void SubWindow::on_item_changed(const QModelIndex& index)
 200 {
 201         if (!index.isValid())
 202                 return;
 203
 204         QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
 205         QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();
 206
 207         if (decoder_name.isEmpty())
 208                 return;
 209
 210         const srd_decoder* d = srd_decoder_get_by_id(decoder_name.toUtf8());
 211
 212         const QString id = QString::fromUtf8(d->id);
 213         const QString longname = QString::fromUtf8(d->longname);
 214         const QString desc = QString::fromUtf8(d->desc);
 215         const QString doc = QString::fromUtf8(srd_decoder_doc_get(d)).trimmed();
 216
 217         QString tags;
 218         for (GSList* li = (GSList*)d->tags; li; li = li->next) {
 219                 QString s = (li == (GSList*)d->tags) ?
 220                         tr((char*)li->data) :
 221                         QString(tr(", %1")).arg(tr((char*)li->data));
 222                 tags.append(s);
 223         }
 224
 225         info_label_header_->setText(QString("<span style='font-size:large'><b>%1 (%2)</b></span><br><i>%3</i>")
 226                 .arg(longname, id, desc));
 227         info_label_body_->setText(doc);
 228         info_label_footer_->setText(tr("<p align='right'>Tags: %1</p>").arg(tags));
 229 }
 230
 231 void SubWindow::on_item_activated(const QModelIndex& index)
 232 {
 233         if (!index.isValid())
 234                 return;
 235
 236         QModelIndex id_index = index.model()->index(index.row(), 2, index.parent());
 237         QString decoder_name = index.model()->data(id_index, Qt::DisplayRole).toString();
 238
 239         const srd_decoder* chosen_decoder = srd_decoder_get_by_id(decoder_name.toUtf8());
 240         if (chosen_decoder == nullptr)
 241                 return;
 242
 243         vector<const srd_decoder*> decoders;
 244         decoders.push_back(chosen_decoder);
 245
 246         // If the decoder only depends on logic inputs, we add it and are done
 247         vector<const char*> inputs = get_decoder_inputs(decoders.front());
 248         if (inputs.size() == 0) {
 249                 qWarning() << "Protocol decoder" << decoder_name << "cannot have 0 inputs!";
 250                 return;
 251         }
 252
 253         if (strncmp(inputs.at(0), "logic", 5) == 0) {
 254                 new_decoders_selected(decoders);
 255                 return;
 256         }
 257
 258         // Check if we can automatically fulfill the stacking requirements
 259         while (strncmp(inputs.at(0), "logic", 5) != 0) {
 260                 vector<const srd_decoder*> prov_decoders = get_decoders_providing(inputs.at(0));
 261
 262                 if (prov_decoders.size() == 0) {
 263                         // Emit warning and add the stack that we could gather so far
 264                         qWarning() << "Protocol decoder" << QString::fromUtf8(decoders.back()->id) \
 265                                 << "has input that no other decoder provides:" << QString::fromUtf8(inputs.at(0));
 266                         break;
 267                 }
 268
 269                 if (prov_decoders.size() == 1) {
 270                         decoders.push_back(prov_decoders.front());
 271                 } else {
 272                         // Let user decide which one to use
 273                         QString caption = QString(tr("Protocol decoder <b>%1</b> requires input type <b>%2</b> " \
 274                                 "which several decoders provide.<br>Choose which one to use:<br>"))
 275                                         .arg(QString::fromUtf8(decoders.back()->id), QString::fromUtf8(inputs.at(0)));
 276
 277                         QStringList items;
 278                         for (const srd_decoder* d : prov_decoders)
 279                                 items << QString::fromUtf8(d->id) + " (" + QString::fromUtf8(d->longname) + ")";
 280                         bool ok_clicked;
 281                         QString item = QInputDialog::getItem(this, tr("Choose Decoder"),
 282                                 tr(caption.toUtf8()), items, 0, false, &ok_clicked);
 283
 284                         if ((!ok_clicked) || (item.isEmpty()))
 285                                 return;
 286
 287                         QString d = item.section(' ', 0, 0);
 288                         decoders.push_back(srd_decoder_get_by_id(d.toUtf8()));
 289                 }
 290
 291                 inputs = get_decoder_inputs(decoders.back());
 292         }
 293
 294         // Reverse decoder list and add the stack
 295         reverse(decoders.begin(), decoders.end());
 296         new_decoders_selected(decoders);
 297 }
 298
 299 void SubWindow::on_filter_changed(const QString& text)
 300 {
 301         sort_filter_model_->setFilterFixedString(text);
 302 }
 303
 304 } // namespace decoder_selector
 305 } // namespace subwindows
 306 } // namespace pv