src/frontends/qt/GuiCommandBuffer.cpp

   1 /**
   2  * \file GuiCommandBuffer.cpp
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author Lars
   7  * \author Asger and Jürgen
   8  * \author John Levon
   9  *
  10  * Full author contact details are available in file CREDITS.
  11  */
  12
  13 #include <config.h>
  14
  15 #include "GuiCommandBuffer.h"
  16
  17 #include "GuiApplication.h"
  18 #include "GuiCommandEdit.h"
  19 #include "GuiView.h"
  20 #include "qt_helpers.h"
  21
  22 #include "BufferView.h"
  23 #include "Cursor.h"
  24 #include "LyX.h"
  25 #include "LyXAction.h"
  26 #include "FuncRequest.h"
  27 #include "Session.h"
  28
  29 #include "support/lstrings.h"
  30
  31 #include <QHBoxLayout>
  32 #include <QKeyEvent>
  33 #include <QListWidget>
  34 #include <QMouseEvent>
  35 #include <QPixmap>
  36 #include <QPushButton>
  37 #include <QToolTip>
  38 #include <QVBoxLayout>
  39
  40 using namespace std;
  41 using namespace lyx::support;
  42
  43 namespace lyx {
  44 namespace frontend {
  45
  46 namespace {
  47
  48 // Simple wrapper around the LastCommand session stuff.
  49
  50 // The whole last commands list
  51 vector<string> const & history() { return theSession().lastCommands().getcommands(); }
  52
  53 // add command to the list (and remove duplicates)
  54 void addHistory(string const & cmd) { theSession().lastCommands().add(cmd); }
  55
  56
  57 class QTempListBox : public QListWidget {
  58 public:
  59         QTempListBox() {
  60                 //setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  61                 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  62                 setWindowModality(Qt::WindowModal);
  63                 setWindowFlags(Qt::Popup);
  64                 setAttribute(Qt::WA_DeleteOnClose);
  65         }
  66 protected:
  67         bool event(QEvent * ev) override {
  68                 if (ev->type() == QEvent::MouseButtonPress) {
  69                         QMouseEvent * me = static_cast<QMouseEvent *>(ev);
  70 #if (QT_VERSION >= QT_VERSION_CHECK(6, 0, 0))
  71                         if (me->position().x() < 0 || me->position().y() < 0
  72                             || me->position().x() > width() || me->position().y() > height())
  73 #else
  74                         if (me->x() < 0 || me->y() < 0
  75                             || me->x() > width() || me->y() > height())
  76 #endif
  77                                 hide();
  78                         return true;
  79                 }
  80                 return QListWidget::event(ev);
  81         }
  82
  83         void keyPressEvent(QKeyEvent * ev) override {
  84                 if (ev->key() == Qt::Key_Escape) {
  85                         hide();
  86                         return;
  87                 } else if (ev->key() == Qt::Key_Return || ev->key() == Qt::Key_Space) {
  88                         // emit signal
  89                         itemClicked(currentItem());
  90                 } else
  91                         QListWidget::keyPressEvent(ev);
  92         }
  93 };
  94
  95 } // namespace
  96
  97
  98 GuiCommandBuffer::GuiCommandBuffer(GuiView * view)
  99         : view_(view)
 100 {
 101         QPixmap qpup = getPixmap("images/", "up", "svgz,png");
 102         QPixmap qpdown = getPixmap("images/", "down", "svgz,png");
 103
 104         QVBoxLayout * top = new QVBoxLayout(this);
 105         QHBoxLayout * layout = new QHBoxLayout(0);
 106
 107         edit_ = new GuiCommandEdit(this);
 108         edit_->setMinimumSize(edit_->sizeHint());
 109         edit_->setFocusPolicy(Qt::ClickFocus);
 110
 111         int height = max(24, 2 * (edit_->sizeHint().height() / 2));
 112         QSize button_size = QSize(height, height);
 113         QSize icon_size = button_size - QSize(4, 4);
 114
 115         upPB = new QPushButton(qpup, "", this);
 116         upPB->setToolTip(qt_("List of previous commands"));
 117         upPB->setMaximumSize(button_size);
 118         upPB->setIconSize(icon_size);
 119         downPB = new QPushButton(qpdown, "", this);
 120         downPB->setToolTip(qt_("Next command"));
 121         downPB->setMaximumSize(button_size);
 122         downPB->setIconSize(icon_size);
 123         downPB->setEnabled(false);
 124         connect(downPB, SIGNAL(clicked()), this, SLOT(down()));
 125         connect(upPB, SIGNAL(pressed()), this, SLOT(listHistoryUp()));
 126
 127         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
 128         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 129         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 130         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 131         connect(edit_, SIGNAL(escapePressed()), this, SLOT(hideParent()));
 132
 133         layout->addWidget(upPB, 0);
 134         layout->addWidget(downPB, 0);
 135         layout->addWidget(edit_, 10);
 136 #if QT_VERSION < 0x060000
 137         layout->setMargin(0);
 138 #else
 139         layout->setContentsMargins(0, 0, 0, 0);
 140 #endif
 141         top->addLayout(layout);
 142 #if QT_VERSION < 0x060000
 143         top->setMargin(0);
 144 #else
 145         top->setContentsMargins(0, 0, 0, 0);
 146 #endif
 147         setFocusProxy(edit_);
 148
 149         upPB->setEnabled(!history().empty());
 150
 151         history_pos_ = history().end();
 152 }
 153
 154
 155 void GuiCommandBuffer::dispatch()
 156 {
 157         std::string const cmd = fromqstr(edit_->text());
 158         DispatchResult const & dr = dispatch(cmd);
 159         if (!dr.error()) {
 160                 view_->setFocus();
 161                 edit_->setText(QString());
 162                 edit_->clearFocus();
 163                 // If the toolbar was "auto", it is not needed anymore
 164                 view_->resetCommandExecute();
 165         }
 166 }
 167
 168
 169 void GuiCommandBuffer::listHistoryUp()
 170 {
 171         if (history().size() == 1) {
 172                 edit_->setText(toqstr(history().back()));
 173                 upPB->setEnabled(false);
 174                 return;
 175         }
 176         QPoint const & pos = upPB->mapToGlobal(QPoint(0, 0));
 177         showList(history(), pos, true);
 178 }
 179
 180
 181 void GuiCommandBuffer::complete()
 182 {
 183         string const input = fromqstr(edit_->text());
 184         string new_input;
 185         vector<string> const & comp = completions(input, new_input);
 186
 187         if (comp.empty()) {
 188                 if (new_input != input)
 189                         edit_->setText(toqstr(new_input));
 190                 return;
 191         }
 192
 193         edit_->setText(toqstr(new_input));
 194         QPoint const & pos = edit_->mapToGlobal(QPoint(0, 0));
 195         showList(comp, pos);
 196 }
 197
 198 void GuiCommandBuffer::showList(vector<string> const & list,
 199         QPoint const & pos, bool reversed) const
 200 {
 201         QTempListBox * listBox = new QTempListBox;
 202
 203         // For some reason the scrollview's contents are larger
 204         // than the number of actual items...
 205         for (auto const & item : list) {
 206                 if (reversed)
 207                         listBox->insertItem(0, toqstr(item));
 208                 else
 209                         listBox->addItem(toqstr(item));
 210         }
 211
 212         listBox->resize(listBox->sizeHint());
 213
 214         int const y = max(0, pos.y() - listBox->height());
 215         listBox->move(pos.x(), y);
 216
 217         connect(listBox, SIGNAL(itemClicked(QListWidgetItem *)),
 218                 this, SLOT(itemSelected(QListWidgetItem *)));
 219         connect(listBox, SIGNAL(itemActivated(QListWidgetItem *)),
 220                 this, SLOT(itemSelected(QListWidgetItem *)));
 221
 222         listBox->show();
 223         listBox->setFocus();
 224 }
 225
 226
 227 void GuiCommandBuffer::itemSelected(QListWidgetItem * item)
 228 {
 229         QWidget const * widget = static_cast<QWidget const *>(sender());
 230         const_cast<QWidget *>(widget)->hide();
 231         edit_->setText(item->text()+ ' ');
 232         edit_->activateWindow();
 233         edit_->setFocus();
 234 }
 235
 236
 237 void GuiCommandBuffer::up()
 238 {
 239         string const h = historyUp();
 240
 241         if (!h.empty())
 242                 edit_->setText(toqstr(h));
 243
 244         upPB->setEnabled(history_pos_ != history().begin());
 245         downPB->setEnabled(history_pos_ != history().end());
 246 }
 247
 248
 249 void GuiCommandBuffer::down()
 250 {
 251         string const h = historyDown();
 252
 253         if (!h.empty())
 254                 edit_->setText(toqstr(h));
 255
 256         downPB->setEnabled(!history().empty()
 257                            && history_pos_ != history().end() - 1);
 258         upPB->setEnabled(history_pos_ != history().begin());
 259 }
 260
 261
 262 void GuiCommandBuffer::hideParent()
 263 {
 264         view_->setFocus();
 265         view_->resetCommandExecute();
 266         edit_->setText(QString());
 267         edit_->clearFocus();
 268 }
 269
 270
 271 string const GuiCommandBuffer::historyUp()
 272 {
 273         if (history_pos_ == history().begin())
 274                 return string();
 275
 276         return *(--history_pos_);
 277 }
 278
 279
 280 string const GuiCommandBuffer::historyDown()
 281 {
 282         if (history_pos_ == history().end())
 283                 return string();
 284         if (history_pos_ + 1 == history().end())
 285                 return string();
 286
 287         return *(++history_pos_);
 288 }
 289
 290
 291 vector<string> const
 292 GuiCommandBuffer::completions(string const & prefix, string & new_prefix)
 293 {
 294         vector<string> comp;
 295         for (auto const & act : lyxaction) {
 296                 if (prefixIs(act.first, prefix))
 297                         comp.push_back(act.first);
 298         }
 299
 300         if (comp.empty()) {
 301                 new_prefix = prefix;
 302                 return comp;
 303         }
 304
 305         if (comp.size() == 1) {
 306                 new_prefix = comp[0];
 307                 return vector<string>();
 308         }
 309
 310         // find maximal available prefix
 311         string const tmp = comp[0];
 312         string test = prefix;
 313         if (tmp.length() > test.length())
 314                 test += tmp[test.length()];
 315         while (test.length() < tmp.length()) {
 316                 vector<string> vtmp;
 317                 for (auto const & cmd : comp) {
 318                         if (prefixIs(cmd, test))
 319                                 vtmp.push_back(cmd);
 320                 }
 321                 if (vtmp.size() != comp.size()) {
 322                         test.erase(test.length() - 1);
 323                         break;
 324                 }
 325                 test += tmp[test.length()];
 326         }
 327
 328         new_prefix = test;
 329         return comp;
 330 }
 331
 332
 333 DispatchResult const & GuiCommandBuffer::dispatch(string const & str)
 334 {
 335         if (str.empty()) {
 336                 static DispatchResult empty_dr;
 337                 return empty_dr;
 338         }
 339
 340         addHistory(trim(str));
 341         history_pos_ = history().end();
 342         upPB->setEnabled(history_pos_ != history().begin());
 343         downPB->setEnabled(history_pos_ != history().end());
 344         FuncRequest func = lyxaction.lookupFunc(str);
 345         func.setOrigin(FuncRequest::COMMANDBUFFER);
 346         return lyx::dispatch(func);
 347 }
 348
 349 } // namespace frontend
 350 } // namespace lyx
 351
 352 #include "moc_GuiCommandBuffer.cpp"