src/frontends/qt4/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 "GuiCommandEdit.h"
  18 #include "GuiView.h"
  19 #include "qt_helpers.h"
  20
  21 #include "BufferView.h"
  22 #include "Cursor.h"
  23 #include "LyXFunc.h"
  24 #include "LyXAction.h"
  25 #include "FuncRequest.h"
  26
  27 #include "support/lyxalgo.h"
  28 #include "support/lstrings.h"
  29
  30 #include <QHBoxLayout>
  31 #include <QKeyEvent>
  32 #include <QLayout>
  33 #include <QListWidget>
  34 #include <QMouseEvent>
  35 #include <QPixmap>
  36 #include <QPushButton>
  37 #include <QToolTip>
  38 #include <QVBoxLayout>
  39
  40 using namespace std;
  41
  42 namespace lyx {
  43 namespace frontend {
  44
  45 using support::prefixIs;
  46
  47
  48 namespace {
  49
  50 class QTempListBox : public QListWidget {
  51 public:
  52         QTempListBox() {
  53                 //setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
  54                 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
  55                 setWindowModality(Qt::WindowModal);
  56                 setWindowFlags(Qt::Popup);
  57                 setAttribute(Qt::WA_DeleteOnClose);
  58         }
  59 protected:
  60         void mouseReleaseEvent(QMouseEvent * ev) {
  61                 if (ev->x() < 0 || ev->y() < 0
  62                     || ev->x() > width() || ev->y() > height()) {
  63                         hide();
  64                 } else {
  65                         // emit signal
  66                         itemPressed(currentItem());
  67                 }
  68         }
  69
  70         void keyPressEvent(QKeyEvent * ev) {
  71                 if (ev->key() == Qt::Key_Escape) {
  72                         hide();
  73                         return;
  74                 } else if (ev->key() == Qt::Key_Return || ev->key() == Qt::Key_Space) {
  75                         // emit signal
  76                         itemPressed(currentItem());
  77                 } else
  78                         QListWidget::keyPressEvent(ev);
  79         }
  80 };
  81
  82 } // end of anon
  83
  84
  85 GuiCommandBuffer::GuiCommandBuffer(GuiView * view)
  86         : view_(view), history_pos_(history_.end())
  87 {
  88         transform(lyxaction.func_begin(), lyxaction.func_end(),
  89                 back_inserter(commands_), firster());
  90
  91         QPixmap qpup(":/images/up.png");
  92         QPixmap qpdown(":/images/down.png");
  93
  94         QVBoxLayout * top = new QVBoxLayout(this);
  95         QHBoxLayout * layout = new QHBoxLayout(0);
  96
  97         QPushButton * up = new QPushButton(qpup, "", this);
  98         up->setMaximumSize(24, 24);
  99         QPushButton * down = new QPushButton(qpdown, "", this);
 100         down->setToolTip(qt_("Next command"));
 101         down->setMaximumSize(24, 24);
 102         connect(down, SIGNAL(clicked()), this, SLOT(down()));
 103
 104         edit_ = new GuiCommandEdit(this);
 105         edit_->setMinimumSize(edit_->sizeHint());
 106         edit_->setFocusPolicy(Qt::ClickFocus);
 107
 108         connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
 109         connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
 110         connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
 111         connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
 112         connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
 113         connect(edit_, SIGNAL(hidePressed()), this, SLOT(hideParent()));
 114
 115         layout->addWidget(up, 0);
 116         layout->addWidget(down, 0);
 117         layout->addWidget(edit_, 10);
 118         layout->setMargin(0);
 119         top->addLayout(layout);
 120         top->setMargin(0);
 121         setFocusProxy(edit_);
 122 }
 123
 124
 125 void GuiCommandBuffer::cancel()
 126 {
 127         view_->setFocus();
 128         edit_->setText(QString());
 129 }
 130
 131
 132 void GuiCommandBuffer::dispatch()
 133 {
 134         dispatch(fromqstr(edit_->text()));
 135         view_->setFocus();
 136         edit_->setText(QString());
 137         edit_->clearFocus();
 138 }
 139
 140
 141 void GuiCommandBuffer::complete()
 142 {
 143         string const input = fromqstr(edit_->text());
 144         string new_input;
 145         vector<string> comp = completions(input, new_input);
 146
 147         if (comp.empty() && new_input == input) {
 148                 // show_info_suffix(qt_("[no match]"), input);
 149                 return;
 150         }
 151
 152         if (comp.empty()) {
 153                 edit_->setText(toqstr(new_input));
 154         //      show_info_suffix(("[only completion]"), new_input + ' ');
 155                 return;
 156         }
 157
 158         edit_->setText(toqstr(new_input));
 159
 160         QTempListBox * list = new QTempListBox;
 161
 162         // For some reason the scrollview's contents are larger
 163         // than the number of actual items...
 164         vector<string>::const_iterator cit = comp.begin();
 165         vector<string>::const_iterator end = comp.end();
 166         for (; cit != end; ++cit)
 167                 list->addItem(toqstr(*cit));
 168
 169         list->resize(list->sizeHint());
 170         QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
 171
 172         int const y = std::max(0, pos.y() - list->height());
 173
 174         list->move(pos.x(), y);
 175
 176         connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
 177                 this, SLOT(complete_selected(QListWidgetItem *)));
 178         connect(list, SIGNAL(itemActivated(QListWidgetItem *)),
 179                 this, SLOT(complete_selected(QListWidgetItem *)));
 180
 181         list->show();
 182         list->setFocus();
 183 }
 184
 185
 186 void GuiCommandBuffer::complete_selected(QListWidgetItem * item)
 187 {
 188         QWidget const * widget = static_cast<QWidget const *>(sender());
 189         const_cast<QWidget *>(widget)->hide();
 190         edit_->setText(item->text() + ' ');
 191         edit_->activateWindow();
 192         edit_->setFocus();
 193 }
 194
 195
 196 void GuiCommandBuffer::up()
 197 {
 198         string const input = fromqstr(edit_->text());
 199         string const h = historyUp();
 200
 201         if (h.empty()) {
 202         //      show_info_suffix(qt_("[Beginning of history]"), input);
 203         } else {
 204                 edit_->setText(toqstr(h));
 205         }
 206 }
 207
 208
 209 void GuiCommandBuffer::down()
 210 {
 211         string const input = fromqstr(edit_->text());
 212         string const h = historyDown();
 213
 214         if (h.empty()) {
 215         //      show_info_suffix(qt_("[End of history]"), input);
 216         } else {
 217                 edit_->setText(toqstr(h));
 218         }
 219 }
 220
 221
 222 void GuiCommandBuffer::hideParent()
 223 {
 224         view_->setFocus();
 225         edit_->setText(QString());
 226         edit_->clearFocus();
 227         hide();
 228 }
 229
 230
 231 namespace {
 232
 233 class prefix_p {
 234 public:
 235         string p;
 236         prefix_p(string const & s) : p(s) {}
 237         bool operator()(string const & s) const { return prefixIs(s, p); }
 238 };
 239
 240 } // end of anon namespace
 241
 242
 243 string const GuiCommandBuffer::historyUp()
 244 {
 245         if (history_pos_ == history_.begin())
 246                 return string();
 247
 248         return *(--history_pos_);
 249 }
 250
 251
 252 string const GuiCommandBuffer::historyDown()
 253 {
 254         if (history_pos_ == history_.end())
 255                 return string();
 256         if (history_pos_ + 1 == history_.end())
 257                 return string();
 258
 259         return *(++history_pos_);
 260 }
 261
 262
 263 docstring const GuiCommandBuffer::getCurrentState() const
 264 {
 265         return view_->view()->cursor().currentState();
 266 }
 267
 268
 269 void GuiCommandBuffer::hide() const
 270 {
 271         FuncRequest cmd(LFUN_COMMAND_EXECUTE, "off");
 272         theLyXFunc().setLyXView(view_);
 273         lyx::dispatch(cmd);
 274 }
 275
 276
 277 vector<string> const
 278 GuiCommandBuffer::completions(string const & prefix, string & new_prefix)
 279 {
 280         vector<string> comp;
 281
 282         copy_if(commands_.begin(), commands_.end(),
 283                 back_inserter(comp), prefix_p(prefix));
 284
 285         if (comp.empty()) {
 286                 new_prefix = prefix;
 287                 return comp;
 288         }
 289
 290         if (comp.size() == 1) {
 291                 new_prefix = comp[0];
 292                 return vector<string>();
 293         }
 294
 295         // find maximal available prefix
 296         string const tmp = comp[0];
 297         string test = prefix;
 298         if (tmp.length() > test.length())
 299                 test += tmp[test.length()];
 300         while (test.length() < tmp.length()) {
 301                 vector<string> vtmp;
 302                 copy_if(comp.begin(), comp.end(),
 303                         back_inserter(vtmp), prefix_p(test));
 304                 if (vtmp.size() != comp.size()) {
 305                         test.erase(test.length() - 1);
 306                         break;
 307                 }
 308                 test += tmp[test.length()];
 309         }
 310
 311         new_prefix = test;
 312         return comp;
 313 }
 314
 315
 316 void GuiCommandBuffer::dispatch(string const & str)
 317 {
 318         if (str.empty())
 319                 return;
 320
 321         history_.push_back(str);
 322         history_pos_ = history_.end();
 323         FuncRequest func = lyxaction.lookupFunc(str);
 324         func.origin = FuncRequest::COMMANDBUFFER;
 325         theLyXFunc().setLyXView(view_);
 326         lyx::dispatch(func);
 327 }
 328
 329 } // namespace frontend
 330 } // namespace lyx
 331
 332 #include "GuiCommandBuffer_moc.cpp"