3 * \file qt/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 (!selection_supported_)
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 if (own && !qApp->clipboard()->ownsSelection()) {
55 LYXERR(Debug::SELECTION, "GuiSelection: setting dummy selection");
56 qApp->clipboard()->setText(QString(), QClipboard::Selection);
58 // We don't need to do anything if own = false, as this case is
60 // FIXME (gb): This is wrong. What is missing here is rather a call of
61 // qApp->clipboard()->clear(QClipboard::Selection);
63 // Since we do not issue this call we rather implement
64 // "persistent selections" as far as X is concerned.
68 docstring const GuiSelection::get() const
70 QString const str = qApp->clipboard()->text(QClipboard::Selection)
71 .normalized(QString::NormalizationForm_C);
72 LYXERR(Debug::SELECTION, "GuiSelection::get: " << str);
76 return internalLineEnding(str);
80 void GuiSelection::put(docstring const & str)
82 LYXERR(Debug::SELECTION, "GuiSelection::put: " << to_utf8(str));
84 qApp->clipboard()->setText(externalLineEnding(str),
85 QClipboard::Selection);
89 void GuiSelection::on_dataChanged()
91 schedule_check_ = true;
92 LYXERR(Debug::SELECTION, "GuiSelection::on_dataChanged");
96 bool GuiSelection::empty() const
98 if (!selection_supported_)
101 // Cache which is to speed up selection-status read
102 // (4 calls when open Edit menu).
103 static bool text_selection_empty;
104 if (schedule_check_) {
105 text_selection_empty = qApp->clipboard()->
106 text(QClipboard::Selection).isEmpty();
107 schedule_check_ = false;
110 LYXERR(Debug::SELECTION, "GuiSelection::filled: " << !text_selection_empty);
111 return text_selection_empty;
114 } // namespace frontend
117 #include "moc_GuiSelection.cpp"