3 * \file qt4/GuiSelection.cpp
4 * This file is part of LyX, the document processor.
5 * Licence details can be found in the file COPYING.
8 * \author Abdelrazak Younes
10 * Full author contact details are available in file CREDITS.
15 #include "GuiSelection.h"
17 #include "qt_helpers.h"
19 #include "support/debug.h"
20 #include "support/lstrings.h"
22 #include <QApplication>
31 GuiSelection::GuiSelection()
32 : schedule_check_(true),
33 selection_supported_(qApp->clipboard()->supportsSelection())
35 connect(qApp->clipboard(), SIGNAL(selectionChanged()),
36 this, SLOT(on_dataChanged()));
40 void GuiSelection::haveSelection(bool own)
42 if (!qApp->clipboard()->supportsSelection())
45 // Tell qt that we have a selection by setting a dummy selection.
46 // We don't use the interface provided by Qt for setting the
47 // selection for performance reasons (see documentation of
48 // Selection::put()). Instead we only tell here that we have a
49 // selection by setting the selection to the empty string.
50 // The real selection is set in GuiApplication::x11EventFilter when
51 // an application actually requests it.
52 // This way calling Selection::have() is cheap and we can do it as
54 //LYXERR(Debug::SELECTION, "GuiSelection: setting dummy selection");
56 qApp->clipboard()->setText(QString(), QClipboard::Selection);
57 // We don't need to do anything if own = false, as this case is
59 // FIXME (gb): This is wrong. What is missing here is rather a call of
61 // qApp->clipboard()->clear(QClipboard::Selection);
62 // Since we do not issue this call we rather implement
63 // "persistent selections" as far as X is concerned.
67 docstring const GuiSelection::get() const
69 QString const str = qApp->clipboard()->text(QClipboard::Selection)
70 .normalized(QString::NormalizationForm_C);
71 LYXERR(Debug::SELECTION, "GuiSelection::get: " << str);
75 return internalLineEnding(str);
79 void GuiSelection::put(docstring const & str)
81 LYXERR(Debug::SELECTION, "GuiSelection::put: " << to_utf8(str));
83 qApp->clipboard()->setText(externalLineEnding(str),
84 QClipboard::Selection);
88 void GuiSelection::on_dataChanged()
90 schedule_check_ = true;
91 LYXERR(Debug::SELECTION, "GuiSelection::on_dataChanged");
95 bool GuiSelection::empty() const
97 if (!selection_supported_)
100 // Cache which is to speed up selection-status read
101 // (4 calls when open Edit menu).
102 static bool text_selection_empty;
103 if (schedule_check_) {
104 text_selection_empty = qApp->clipboard()->
105 text(QClipboard::Selection).isEmpty();
106 schedule_check_ = false;
109 LYXERR(Debug::SELECTION, "GuiSelection::filled: " << !text_selection_empty);
110 return text_selection_empty;
113 } // namespace frontend
116 #include "moc_GuiSelection.cpp"