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