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