X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Ffrontends%2Fqt4%2FGuiViewSource.cpp;h=a5beae5da691e673c05fa55d77e9ae9274527128;hb=425d092204118ea6c24c28e85fdf03fcf2bb51a4;hp=8b4f93f34df23c1eecb29ff27eaf7eb5526d8328;hpb=bcbf7c6452a446b13790a3fe41ee742d73b69181;p=lyx.git

diff --git a/src/frontends/qt4/GuiViewSource.cpp b/src/frontends/qt4/GuiViewSource.cpp
index 8b4f93f34d..a5beae5da6 100644
--- a/src/frontends/qt4/GuiViewSource.cpp
+++ b/src/frontends/qt4/GuiViewSource.cpp
@@ -23,11 +23,13 @@
 #include "Paragraph.h"
 #include "TexRow.h"
 
-#include "support/Debug.h"
+#include "support/debug.h"
 #include "support/lassert.h"
 #include "support/docstream.h"
 #include "support/gettext.h"
 
+#include <boost/crc.hpp>
+
 #include <QSettings>
 #include <QTextCursor>
 #include <QTextDocument>
@@ -48,6 +50,8 @@ ViewSourceWidget::ViewSourceWidget()
 		this, SLOT(updateView()));
 	connect(autoUpdateCB, SIGNAL(toggled(bool)),
 		updatePB, SLOT(setDisabled(bool)));
+	connect(autoUpdateCB, SIGNAL(toggled(bool)),
+		this, SLOT(updateView()));
 	connect(updatePB, SIGNAL(clicked()),
 		this, SLOT(updateView()));
 
@@ -69,10 +73,19 @@ ViewSourceWidget::ViewSourceWidget()
 }
 
 
+static size_t crcCheck(docstring const & s)
+{
+	boost::crc_32_type crc;
+	crc.process_bytes(&s[0], sizeof(char_type) * s.size());
+	return crc.checksum();
+}
+
+
 /** get the source code of selected paragraphs, or the whole document
 	\param fullSource get full source code
+	\return true if the content has changed since last call.
  */
-static QString getContent(BufferView const * view, bool fullSource)
+static bool getContent(BufferView const * view, bool fullSource, QString & qstr)
 {
 	// get the *top* level paragraphs that contain the cursor,
 	// or the selected text
@@ -90,13 +103,21 @@ static QString getContent(BufferView const * view, bool fullSource)
 		swap(par_begin, par_end);
 	odocstringstream ostr;
 	view->buffer().getSourceCode(ostr, par_begin, par_end + 1, fullSource);
-	return toqstr(ostr.str());
+	docstring s = ostr.str();
+	static size_t crc = 0;
+	size_t newcrc = crcCheck(s);
+	if (newcrc == crc)
+		return false;
+	crc = newcrc;
+	qstr = toqstr(s);
+	return true;
 }
 
 
 void ViewSourceWidget::setBufferView(BufferView const * bv)
 {
 	bv_ = bv;
+	setEnabled(bv ?  true : false);
 }
 
 
@@ -107,8 +128,12 @@ void ViewSourceWidget::updateView()
 		setEnabled(false);
 		return;
 	}
+	
+	setEnabled(true);
 
-	document_->setPlainText(getContent(bv_, viewFullSourceCB->isChecked()));
+	QString content;
+	if (getContent(bv_, viewFullSourceCB->isChecked(), content))
+		document_->setPlainText(content);
 
 	CursorSlice beg = bv_->cursor().selectionBegin().bottom();
 	CursorSlice end = bv_->cursor().selectionEnd().bottom();
@@ -156,12 +181,10 @@ void GuiViewSource::updateView()
 
 void GuiViewSource::enableView(bool enable)
 {
-	if (!enable) {
+	widget_->setBufferView(bufferview());
+	if (!enable)
 		// In the opposite case, updateView() will be called anyway.
-		widget_->setBufferView(bufferview());
 		widget_->updateView();
-	}
-	widget_->setEnabled(enable);
 }
 
 
@@ -201,11 +224,14 @@ void GuiViewSource::saveSession() const
 void GuiViewSource::restoreSession()
 {
 	DockView::restoreSession();
+	// FIXME: Full source updating is too slow to be done at startup.
+	//widget_->viewFullSourceCB->setChecked(
+	//	settings.value(sessionKey() + "/fullsource", false).toBool());
+	widget_->viewFullSourceCB->setChecked(false);
 	QSettings settings;
-	widget_->viewFullSourceCB->setChecked(
-		settings.value(sessionKey() + "/fullsource", false).toBool());
 	widget_->autoUpdateCB->setChecked(
 		settings.value(sessionKey() + "/autoupdate", true).toBool());
+	widget_->updateView();
 }
 
 
@@ -218,4 +244,4 @@ Dialog * createGuiViewSource(GuiView & lv)
 } // namespace frontend
 } // namespace lyx
 
-#include "GuiViewSource_moc.cpp"
+#include "moc_GuiViewSource.cpp"