src/frontends/qt3/QWorkArea.C

   1 /**
   2  * \file QWorkArea.C
   3  * This file is part of LyX, the document processor.
   4  * Licence details can be found in the file COPYING.
   5  *
   6  * \author John Levon
   7  *
   8  * Full author contact details are available in file CREDITS.
   9  */
  10
  11 #include <config.h>
  12
  13 #include "frontends/LyXView.h"
  14 #include "BufferView.h"
  15
  16 #include "QWorkArea.h"
  17
  18 #include "lcolorcache.h"
  19 #include "qt_helpers.h"
  20
  21 #include "debug.h"
  22 #include "funcrequest.h"
  23 #include "LColor.h"
  24 #include "support/os.h"
  25
  26 #include <qapplication.h>
  27 #include <qclipboard.h>
  28 #include <qdragobject.h>
  29 #include <qlayout.h>
  30 #include <qmainwindow.h>
  31 #include <qpainter.h>
  32
  33 #ifdef Q_WS_X11
  34 #include <X11/Xlib.h>
  35 #endif
  36
  37 #ifdef Q_WS_MACX
  38 #include <Carbon/Carbon.h>
  39 #endif
  40
  41 #ifdef Q_OS_MAC
  42 #include <support/lstrings.h>
  43
  44 using lyx::support::subst;
  45 #endif
  46 using std::endl;
  47 using std::string;
  48
  49 namespace os = lyx::support::os;
  50
  51 namespace {
  52 QWorkArea * wa_ptr = 0;
  53 }
  54
  55 QWorkArea::QWorkArea(LyXView & owner, int, int)
  56         : WorkArea(), QWidget(qApp->mainWidget()), owner_(owner), painter_(*this)
  57 {
  58         scrollbar_ = new QScrollBar(QScrollBar::Vertical, this);
  59         content_ = new QContentPane(this);
  60
  61         (static_cast<QMainWindow*>(qApp->mainWidget()))->setCentralWidget(this);
  62
  63         setFocusProxy(content_);
  64         setAcceptDrops(true);
  65
  66         content_->show();
  67
  68         // It is said that this helps reduce flicker
  69         content_->setBackgroundMode(NoBackground);
  70
  71         QHBoxLayout * vl = new QHBoxLayout(this);
  72         vl->addWidget(content_, 5);
  73         vl->addWidget(scrollbar_, 0);
  74
  75 #ifdef Q_WS_MACX
  76         wa_ptr = this;
  77 #endif
  78         show();
  79 }
  80
  81
  82 QWorkArea::~QWorkArea()
  83 {
  84 }
  85
  86
  87 void QWorkArea::setScrollbarParams(int h, int pos, int line_h)
  88 {
  89         // do what cursor movement does (some grey)
  90         h += height() / 4;
  91
  92         int max = std::max(0, h - height());
  93
  94         scrollbar_->setRange(0, max);
  95         content_->trackScrollbar(false);
  96         scrollbar_->setValue(pos);
  97         content_->trackScrollbar(true);
  98         scrollbar_->setLineStep(line_h);
  99         scrollbar_->setPageStep(height());
 100 }
 101
 102 #ifdef Q_WS_X11
 103 bool lyxX11EventFilter(XEvent * xev)
 104 {
 105         switch (xev->type) {
 106         case SelectionRequest:
 107                 lyxerr[Debug::GUI] << "X requested selection." << endl;
 108                 if (wa_ptr)
 109                         wa_ptr->view().view()->selectionRequested();
 110                 break;
 111         case SelectionClear:
 112                 lyxerr[Debug::GUI] << "Lost selection." << endl;
 113                 if (wa_ptr)
 114                         wa_ptr->view().view()->selectionLost();
 115                 break;
 116         }
 117         return false;
 118 }
 119 #endif
 120
 121 #ifdef Q_WS_MACX
 122 namespace{
 123 OSErr checkAppleEventForMissingParams(const AppleEvent& theAppleEvent)
 124  {
 125         DescType returnedType;
 126         Size actualSize;
 127         OSErr err = AEGetAttributePtr(&theAppleEvent, keyMissedKeywordAttr,
 128                                       typeWildCard, &returnedType, nil, 0,
 129                                       &actualSize);
 130         switch (err) {
 131         case errAEDescNotFound:
 132                 return noErr;
 133         case noErr:
 134                 return errAEEventNotHandled;
 135         default:
 136                 return err;
 137         }
 138  }
 139 }
 140
 141 pascal OSErr handleOpenDocuments(const AppleEvent* inEvent,
 142                                  AppleEvent* /*reply*/, long /*refCon*/)
 143 {
 144         QString s_arg;
 145         AEDescList documentList;
 146         OSErr err = AEGetParamDesc(inEvent, keyDirectObject, typeAEList,
 147                                    &documentList);
 148         if (err != noErr)
 149                 return err;
 150
 151         err = checkAppleEventForMissingParams(*inEvent);
 152         if (err == noErr) {
 153                 long documentCount;
 154                 err = AECountItems(&documentList, &documentCount);
 155                 for (long documentIndex = 1;
 156                      err == noErr && documentIndex <= documentCount;
 157                      documentIndex++) {
 158                         DescType returnedType;
 159                         Size actualSize;
 160                         AEKeyword keyword;
 161                         FSRef ref;
 162                         char qstr_buf[1024];
 163                         err = AESizeOfNthItem(&documentList, documentIndex,
 164                                               &returnedType, &actualSize);
 165                         if (err == noErr) {
 166                                 err = AEGetNthPtr(&documentList, documentIndex,
 167                                                   typeFSRef, &keyword,
 168                                                   &returnedType, (Ptr)&ref,
 169                                                   sizeof(FSRef), &actualSize);
 170                                 if (err == noErr) {
 171                                         FSRefMakePath(&ref, (UInt8*)qstr_buf,
 172                                                       1024);
 173                                         s_arg=QString::fromUtf8(qstr_buf);
 174                                         wa_ptr->view().view()->workAreaDispatch(
 175                                                 FuncRequest(LFUN_FILE_OPEN,
 176                                                             fromqstr(s_arg)));
 177                                         break;
 178                                 }
 179                         }
 180                 } // for ...
 181         }
 182         AEDisposeDesc(&documentList);
 183         return err;
 184 }
 185 #endif  // Q_WS_MACX
 186
 187 void QWorkArea::haveSelection(bool own) const
 188 {
 189         wa_ptr = const_cast<QWorkArea*>(this);
 190
 191         if (!QApplication::clipboard()->supportsSelection())
 192                 return;
 193
 194         if (own) {
 195                 QApplication::clipboard()->setSelectionMode(true);
 196                 QApplication::clipboard()->setText(QString());
 197         }
 198         // We don't need to do anything if own = false, as this case is
 199         // handled by QT.
 200 }
 201
 202
 203 string const QWorkArea::getClipboard() const
 204 {
 205         QApplication::clipboard()->setSelectionMode(true);
 206         QString str = QApplication::clipboard()->text();
 207         if (str.isNull())
 208                 return string();
 209 #ifdef Q_OS_MAC
 210         // The MAC clipboard uses \r for lineendings, and we use \n
 211         return subst(fromqstr(str), '\r', '\n');
 212 #else
 213         return fromqstr(str);
 214 #endif
 215 }
 216
 217
 218 void QWorkArea::putClipboard(string const & str) const
 219 {
 220         QApplication::clipboard()->setSelectionMode(true);
 221 #ifdef Q_OS_MAC
 222         // The MAC clipboard uses \r for lineendings, and we use \n
 223         QApplication::clipboard()->setText(toqstr(subst(str, '\n', '\r')));
 224 #else
 225         QApplication::clipboard()->setText(toqstr(str));
 226 #endif
 227 }
 228
 229
 230 void QWorkArea::dragEnterEvent(QDragEnterEvent * event)
 231 {
 232         event->accept(QUriDrag::canDecode(event));
 233 }
 234
 235
 236 void QWorkArea::dropEvent(QDropEvent * event)
 237 {
 238         QStringList files;
 239
 240         if (QUriDrag::decodeLocalFiles(event, files)) {
 241                 lyxerr[Debug::GUI] << "QWorkArea::dropEvent: got URIs!"
 242                                    << endl;
 243                 for (QStringList::Iterator i = files.begin();
 244                      i != files.end(); ++i) {
 245                         string const file = os::internal_path(fromqstr(*i));
 246                         view().view()->workAreaDispatch(FuncRequest(LFUN_FILE_OPEN, file));
 247                 }
 248         }
 249 }