X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Ffrontends%2Fqt4%2FGuiClipboard.cpp;h=297b828948e45612d0a50456fcfe8ddfe70f4526;hb=8e7d7e42952f0119db1c192386a63d1d9ede3b7f;hp=188eafbbcefe545b306b4bfa2e7a3c66c1b8a879;hpb=b89cc942eb458284f40f4d4e7db58890c3288979;p=lyx.git

diff --git a/src/frontends/qt4/GuiClipboard.cpp b/src/frontends/qt4/GuiClipboard.cpp
index 188eafbbce..297b828948 100644
--- a/src/frontends/qt4/GuiClipboard.cpp
+++ b/src/frontends/qt4/GuiClipboard.cpp
@@ -12,27 +12,95 @@
 
 #include <config.h>
 
+#include "FileDialog.h"
+
 #include "GuiClipboard.h"
 #include "qt_helpers.h"
 
+#include "Buffer.h"
+#include "BufferView.h"
+#include "Cursor.h"
+
+#include "support/lassert.h"
+#include "support/convert.h"
 #include "support/debug.h"
+#include "support/filetools.h"
+#include "support/gettext.h"
+#include "support/lstrings.h"
+#include "support/lyxtime.h"
+
+#ifdef Q_WS_MACX
+#include "support/linkback/LinkBackProxy.h"
+#endif // Q_WS_MACX
+
+#include "frontends/alert.h"
 
 #include <QApplication>
+#include <QBuffer>
 #include <QClipboard>
+#include <QDataStream>
+#include <QFile>
+#include <QImage>
 #include <QMimeData>
 #include <QString>
+#include <QStringList>
 
-#include "support/lstrings.h"
+#include <memory>
+#include <map>
+#include <iostream>
 
 using namespace std;
 using namespace lyx::support;
 
-static char const * const mime_type = "application/x-lyx";
 
 namespace lyx {
 
 namespace frontend {
 
+static QMimeData const * read_clipboard() 
+{
+	LYXERR(Debug::ACTION, "Getting Clipboard");
+	QMimeData const * source =
+		qApp->clipboard()->mimeData(QClipboard::Clipboard);
+	if (!source) {
+		LYXERR0("0 bytes (no QMimeData)");
+		return new QMimeData();
+	}
+	// It appears that doing IO between getting a mimeData object
+	// and using it can cause a crash (maybe Qt used IO
+	// as an excuse to free() it? Anyway let's not introduce
+	// any new IO here, so e.g. leave the following line commented.
+	// lyxerr << "Got Clipboard (" << (long) source << ")\n" ;
+	return source;
+}
+
+
+void CacheMimeData::update()
+{
+	time_t const start_time = current_time();
+	LYXERR(Debug::ACTION, "Creating CacheMimeData object");
+	cached_formats_ = read_clipboard()->formats();
+
+	// Qt times out after 5 seconds if it does not recieve a response.
+	if (current_time() - start_time > 3) {
+		LYXERR0("No timely response from clipboard, perhaps process "
+			<< "holding clipboard is frozen?");
+	}
+}
+
+
+QByteArray CacheMimeData::data(QString const & mimeType) const 
+{
+	return read_clipboard()->data(mimeType);
+}
+
+
+QString const lyxMimeType(){ return "application/x-lyx"; }
+QString const pdfMimeType(){ return "application/pdf"; }
+QString const emfMimeType(){ return "image/x-emf"; }
+QString const wmfMimeType(){ return "image/x-wmf"; }
+
+
 GuiClipboard::GuiClipboard()
 {
 	connect(qApp->clipboard(), SIGNAL(dataChanged()),
@@ -47,15 +115,9 @@ string const GuiClipboard::getAsLyX() const
 	LYXERR(Debug::ACTION, "GuiClipboard::getAsLyX(): `");
 	// We don't convert encodings here since the encoding of the
 	// clipboard contents is specified in the data itself
-	QMimeData const * source =
-		qApp->clipboard()->mimeData(QClipboard::Clipboard);
-	if (!source) {
-		LYXERR(Debug::ACTION, "' (no QMimeData)");
-		return string();
-	}
-	if (source->hasFormat(mime_type)) {
+	if (cache_.hasFormat(lyxMimeType())) {
 		// data from ourself or some other LyX instance
-		QByteArray const ar = source->data(mime_type);
+		QByteArray const ar = cache_.data(lyxMimeType());
 		string const s(ar.data(), ar.count());
 		LYXERR(Debug::ACTION, s << "'");
 		return s;
@@ -65,16 +127,215 @@ string const GuiClipboard::getAsLyX() const
 }
 
 
+FileName GuiClipboard::getPastedGraphicsFileName(Cursor const & cur,
+	Clipboard::GraphicsType & type) const
+{
+	// create file dialog filter according to the existing types in the clipboard
+	vector<Clipboard::GraphicsType> types;
+	if (hasGraphicsContents(Clipboard::EmfGraphicsType))
+		types.push_back(Clipboard::EmfGraphicsType);
+	if (hasGraphicsContents(Clipboard::WmfGraphicsType))
+		types.push_back(Clipboard::WmfGraphicsType);
+	if (hasGraphicsContents(Clipboard::LinkBackGraphicsType))
+		types.push_back(Clipboard::LinkBackGraphicsType);
+	if (hasGraphicsContents(Clipboard::PdfGraphicsType))
+		types.push_back(Clipboard::PdfGraphicsType);
+	if (hasGraphicsContents(Clipboard::PngGraphicsType))
+		types.push_back(Clipboard::PngGraphicsType);
+	if (hasGraphicsContents(Clipboard::JpegGraphicsType))
+		types.push_back(Clipboard::JpegGraphicsType);
+	
+	LASSERT(!types.empty(), /**/);
+	
+	// select prefered type if AnyGraphicsType was passed
+	if (type == Clipboard::AnyGraphicsType)
+		type = types.front();
+	
+	// which extension?
+	map<Clipboard::GraphicsType, string> extensions;
+	map<Clipboard::GraphicsType, docstring> typeNames;
+	
+	extensions[Clipboard::EmfGraphicsType] = "emf";
+	extensions[Clipboard::WmfGraphicsType] = "wmf";
+	extensions[Clipboard::LinkBackGraphicsType] = "linkback";
+	extensions[Clipboard::PdfGraphicsType] = "pdf";
+	extensions[Clipboard::PngGraphicsType] = "png";
+	extensions[Clipboard::JpegGraphicsType] = "jpeg";
+	
+	typeNames[Clipboard::EmfGraphicsType] = _("Enhanced Metafile");
+	typeNames[Clipboard::WmfGraphicsType] = _("Windows Metafile");
+	typeNames[Clipboard::LinkBackGraphicsType] = _("LinkBack PDF");
+	typeNames[Clipboard::PdfGraphicsType] = _("PDF");
+	typeNames[Clipboard::PngGraphicsType] = _("PNG");
+	typeNames[Clipboard::JpegGraphicsType] = _("JPEG");
+	
+	// find unused filename with primary extension
+	string document_path = cur.buffer()->fileName().onlyPath().absFileName();
+	unsigned newfile_number = 0;
+	FileName filename;
+	do {
+		++newfile_number;
+		filename = FileName(addName(document_path,
+			to_utf8(_("pasted"))
+			+ convert<string>(newfile_number) + "."
+			+ extensions[type]));
+	} while (filename.isReadableFile());
+	
+	while (true) {
+		// create file type filter, putting the prefered on to the front
+		QStringList filter;
+		for (size_t i = 0; i != types.size(); ++i) {
+			docstring s = bformat(_("%1$s Files"), typeNames[types[i]])
+				+ " (*." + from_ascii(extensions[types[i]]) + ")";
+			if (types[i] == type)
+				filter.prepend(toqstr(s));
+			else
+				filter.append(toqstr(s));
+		}
+		filter = fileFilters(filter.join(";;"));
+		
+		// show save dialog for the graphic
+		FileDialog dlg(qt_("Choose a filename to save the pasted graphic as"));
+		FileDialog::Result result =
+		dlg.save(toqstr(filename.onlyPath().absFileName()), filter,
+			 toqstr(filename.onlyFileName()));
+		
+		if (result.first == FileDialog::Later)
+			return FileName();
+		
+		string newFilename = fromqstr(result.second);
+		if (newFilename.empty()) {
+			cur.bv().message(_("Canceled."));
+			return FileName();
+		}
+		filename.set(newFilename);
+		
+		// check the extension (the user could have changed it)
+		if (!suffixIs(ascii_lowercase(filename.absFileName()),
+			      "." + extensions[type])) {
+			// the user changed the extension. Check if the type is available
+			size_t i;
+			for (i = 1; i != types.size(); ++i) {
+				if (suffixIs(ascii_lowercase(filename.absFileName()),
+					     "." + extensions[types[i]])) {
+					type = types[i];
+					break;
+				}
+			}
+			
+			// invalid extension found, or none at all. In the latter
+			// case set the default extensions.
+			if (i == types.size()
+			    && filename.onlyFileName().find('.') == string::npos) {
+				filename.changeExtension("." + extensions[type]);
+			}
+		}
+		
+		// check whether the file exists and warn the user
+		if (!filename.exists())
+			break;
+		int ret = frontend::Alert::prompt(
+			_("Overwrite external file?"),
+			bformat(_("File %1$s already exists, do you want to overwrite it?"),
+			from_utf8(filename.absFileName())), 1, 1, _("&Overwrite"), _("&Cancel"));
+		if (ret == 0)
+			// overwrite, hence break the dialog loop
+			break;
+		
+		// not overwrite, hence show the dialog again (i.e. loop)
+	}
+	
+	return filename;
+}
+
+
+FileName GuiClipboard::getAsGraphics(Cursor const & cur, GraphicsType type) const
+{
+	// get the filename from the user
+	FileName filename = getPastedGraphicsFileName(cur, type);
+	if (filename.empty())
+		return FileName();
+
+	// handle image cases first
+	if (type == PngGraphicsType || type == JpegGraphicsType) {
+		// get image from QImage from clipboard
+		QImage image = qApp->clipboard()->image();
+		if (image.isNull()) {
+			LYXERR(Debug::ACTION, "No image in clipboard");
+			return FileName();
+		}
+
+		// convert into graphics format
+		QByteArray ar;
+		QBuffer buffer(&ar);
+		buffer.open(QIODevice::WriteOnly);
+		if (type == PngGraphicsType)
+			image.save(toqstr(filename.absFileName()), "PNG");
+		else if (type == JpegGraphicsType)
+			image.save(toqstr(filename.absFileName()), "JPEG");
+		else
+			LASSERT(false, /**/);
+		
+		return filename;
+	}
+	
+	// get mime for type
+	QString mime;
+	switch (type) {
+	case PdfGraphicsType: mime = pdfMimeType(); break;
+	case LinkBackGraphicsType: mime = pdfMimeType(); break;
+	case EmfGraphicsType: mime = emfMimeType(); break;
+	case WmfGraphicsType: mime = wmfMimeType(); break;
+	default: LASSERT(false, /**/);
+	}
+	
+	// get data
+	if (!cache_.hasFormat(mime))
+		return FileName();
+	// data from ourself or some other LyX instance
+	QByteArray const ar = cache_.data(mime);
+	LYXERR(Debug::ACTION, "Getting from clipboard: mime = " << mime.data()
+	       << "length = " << ar.count());
+	
+	QFile f(toqstr(filename.absFileName()));
+	if (!f.open(QIODevice::WriteOnly | QIODevice::Truncate)) {
+		LYXERR(Debug::ACTION, "Error opening file "
+		       << filename.absFileName() << " for writing");
+		return FileName();
+	}
+	
+	// write the (LinkBack) PDF data
+	f.write(ar);
+	if (type == LinkBackGraphicsType) {
+#ifdef Q_WS_MACX
+		void const * linkBackData;
+		unsigned linkBackLen;
+		getLinkBackData(&linkBackData, &linkBackLen);
+		f.write((char *)linkBackData, linkBackLen);
+		quint32 pdfLen = ar.size();
+		QDataStream ds(&f);
+		ds << pdfLen; // big endian by default
+#else
+		// only non-Mac this should never happen
+		LASSERT(false, /**/);
+#endif // Q_WS_MACX
+	}
+
+	f.close();
+	return filename;
+}
+
+
 docstring const GuiClipboard::getAsText() const
 {
 	// text data from other applications
 	QString const str = qApp->clipboard()->text(QClipboard::Clipboard)
 				.normalized(QString::NormalizationForm_C);
-	LYXERR(Debug::ACTION, "GuiClipboard::getAsText(): `" << fromqstr(str) << "'");
+	LYXERR(Debug::ACTION, "GuiClipboard::getAsText(): `" << str << "'");
 	if (str.isNull())
 		return docstring();
 
-	return internalLineEnding(qstring_to_ucs4(str));
+	return internalLineEnding(str);
 }
 
 
@@ -87,7 +348,7 @@ void GuiClipboard::put(string const & lyx, docstring const & text)
 	QMimeData * data = new QMimeData;
 	if (!lyx.empty()) {
 		QByteArray const qlyx(lyx.c_str(), lyx.size());
-		data->setData(mime_type, qlyx);
+		data->setData(lyxMimeType(), qlyx);
 	}
 	// Don't test for text.empty() since we want to be able to clear the
 	// clipboard.
@@ -99,9 +360,55 @@ void GuiClipboard::put(string const & lyx, docstring const & text)
 
 bool GuiClipboard::hasLyXContents() const
 {
-	QMimeData const * const source =
-		qApp->clipboard()->mimeData(QClipboard::Clipboard);
-	return source && source->hasFormat(mime_type);
+	return cache_.hasFormat(lyxMimeType());
+}
+
+
+bool GuiClipboard::hasTextContents() const
+{
+	return cache_.hasText();
+}
+
+
+bool GuiClipboard::hasGraphicsContents(Clipboard::GraphicsType type) const
+{
+	if (type == AnyGraphicsType) {
+		return hasGraphicsContents(PdfGraphicsType)
+			|| hasGraphicsContents(PngGraphicsType)
+			|| hasGraphicsContents(JpegGraphicsType)
+			|| hasGraphicsContents(EmfGraphicsType)
+			|| hasGraphicsContents(WmfGraphicsType)
+			|| hasGraphicsContents(LinkBackGraphicsType);
+	}
+
+	// handle image cases first
+	if (type == PngGraphicsType || type == JpegGraphicsType)
+		return cache_.hasImage();
+
+	// handle LinkBack for Mac
+	if (type == LinkBackGraphicsType)
+#ifdef Q_WS_MACX
+		return isLinkBackDataInPasteboard();
+#else
+		return false;
+#endif // Q_WS_MACX
+	
+	// get mime data
+	QStringList const & formats = cache_.formats();
+	LYXERR(Debug::ACTION, "We found " << formats.size() << " formats");
+	for (int i = 0; i < formats.size(); ++i)
+		LYXERR(Debug::ACTION, "Found format " << formats[i]);
+
+	// compute mime for type
+	QString mime;
+	switch (type) {
+	case EmfGraphicsType: mime = emfMimeType(); break;
+	case WmfGraphicsType: mime = wmfMimeType(); break;
+	case PdfGraphicsType: mime = pdfMimeType(); break;
+	default: LASSERT(false, /**/);
+	}
+	
+	return cache_.hasFormat(mime);
 }
 
 
@@ -115,12 +422,38 @@ bool GuiClipboard::isInternal() const
 }
 
 
+bool GuiClipboard::hasInternal() const
+{
+	// Windows and Mac OS X does not have the concept of ownership;
+	// the clipboard is a fully global resource so all applications 
+	// are notified of changes.
+#if (defined(Q_WS_X11))
+	return true;
+#else
+	return false;
+#endif
+}
+
+
 void GuiClipboard::on_dataChanged()
 {
+	//Note: we do not really need to run cache_.update() unless the
+	//data has been changed *and* the GuiClipboard has been queried.
+	//However if run cache_.update() the moment a process grabs the
+	//clipboard, the process holding the clipboard presumably won't
+	//yet be frozen, and so we won't need to wait 5 seconds for Qt
+	//to time-out waiting for the clipboard.
+	cache_.update();
+	QStringList l = cache_.formats();
+	LYXERR(Debug::ACTION, "Qt Clipboard changed. We found the following mime types:");
+	for (int i = 0; i < l.count(); i++)
+		LYXERR(Debug::ACTION, l.value(i));
+	
 	text_clipboard_empty_ = qApp->clipboard()->
 		text(QClipboard::Clipboard).isEmpty();
 
 	has_lyx_contents_ = hasLyXContents();
+	has_graphics_contents_ = hasGraphicsContents();
 }
 
 
@@ -132,10 +465,10 @@ bool GuiClipboard::empty() const
 	// clipboard does not come from LyX.
 	if (!text_clipboard_empty_)
 		return false;
-	return !has_lyx_contents_;
+	return !has_lyx_contents_ && !has_graphics_contents_;
 }
 
 } // namespace frontend
 } // namespace lyx
 
-#include "GuiClipboard_moc.cpp"
+#include "moc_GuiClipboard.cpp"