lyx_mirror/src/frontends/qt4/GuiViewSource.cpp

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/**
* \file GuiViewSource.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author John Levon
* \author Bo Peng
* \author Abdelrazak Younes
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "GuiApplication.h"
#include "GuiViewSource.h"
#include "LaTeXHighlighter.h"
#include "qt_helpers.h"
#include "BufferView.h"
#include "Buffer.h"
#include "Cursor.h"
#include "Paragraph.h"
#include "TexRow.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>
#include <QVariant>
using namespace std;
namespace lyx {
namespace frontend {
ViewSourceWidget::ViewSourceWidget()
: bv_(0), document_(new QTextDocument(this)),
highlighter_(new LaTeXHighlighter(document_))
{
setupUi(this);
connect(viewFullSourceCB, SIGNAL(clicked()),
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()));
// setting a document at this point trigger an assertion in Qt
// so we disable the signals here:
document_->blockSignals(true);
viewSourceTV->setDocument(document_);
document_->blockSignals(false);
viewSourceTV->setReadOnly(true);
///dialog_->viewSourceTV->setAcceptRichText(false);
// this is personal. I think source code should be in fixed-size font
QFont font(guiApp->typewriterFontName());
font.setKerning(false);
font.setFixedPitch(true);
font.setStyleHint(QFont::TypeWriter);
viewSourceTV->setFont(font);
// again, personal taste
viewSourceTV->setWordWrapMode(QTextOption::NoWrap);
}
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 bool getContent(BufferView const * view, bool fullSource, QString & qstr)
{
// get the *top* level paragraphs that contain the cursor,
// or the selected text
pit_type par_begin;
pit_type par_end;
if (!view->cursor().selection()) {
par_begin = view->cursor().bottom().pit();
par_end = par_begin;
} else {
par_begin = view->cursor().selectionBegin().bottom().pit();
par_end = view->cursor().selectionEnd().bottom().pit();
}
if (par_begin > par_end)
swap(par_begin, par_end);
odocstringstream ostr;
const_cast<BufferView *>(view)->buffer().getSourceCode(
ostr, par_begin, par_end + 1, fullSource);
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);
}
void ViewSourceWidget::updateView()
{
if (!bv_) {
document_->setPlainText(QString());
setEnabled(false);
return;
}
setEnabled(true);
QString content;
if (getContent(bv_, viewFullSourceCB->isChecked(), content))
document_->setPlainText(content);
CursorSlice beg = bv_->cursor().selectionBegin().bottom();
CursorSlice end = bv_->cursor().selectionEnd().bottom();
int const begrow = bv_->buffer().texrow().
getRowFromIdPos(beg.paragraph().id(), beg.pos());
int endrow = bv_->buffer().texrow().
getRowFromIdPos(end.paragraph().id(), end.pos());
int const nextendrow = bv_->buffer().texrow().
getRowFromIdPos(end.paragraph().id(), end.pos() + 1);
if (endrow != nextendrow)
endrow = nextendrow - 1;
QTextCursor c = QTextCursor(viewSourceTV->document());
c.movePosition(QTextCursor::NextBlock, QTextCursor::MoveAnchor, begrow);
c.select(QTextCursor::BlockUnderCursor);
c.movePosition(QTextCursor::NextBlock, QTextCursor::KeepAnchor,
endrow - begrow + 1);
viewSourceTV->setTextCursor(c);
}
GuiViewSource::GuiViewSource(GuiView & parent,
Qt::DockWidgetArea area, Qt::WindowFlags flags)
: DockView(parent, "view-source", qt_("LaTeX Source"), area, flags)
{
widget_ = new ViewSourceWidget();
setWidget(widget_);
}
GuiViewSource::~GuiViewSource()
{
delete widget_;
}
void GuiViewSource::updateView()
{
if (widget_->autoUpdateCB->isChecked()) {
widget_->setBufferView(bufferview());
widget_->updateView();
}
}
void GuiViewSource::enableView(bool enable)
{
widget_->setBufferView(bufferview());
if (!enable)
// In the opposite case, updateView() will be called anyway.
widget_->updateView();
}
bool GuiViewSource::initialiseParams(string const & /*source*/)
{
setWindowTitle(title());
return true;
}
QString GuiViewSource::title() const
{
switch (docType()) {
case LATEX:
return qt_("LaTeX Source");
case DOCBOOK:
return qt_("DocBook Source");
case LITERATE:
return qt_("Literate Source");
}
LASSERT(false, /**/);
return QString();
}
void GuiViewSource::saveSession() const
{
Dialog::saveSession();
QSettings settings;
settings.setValue(
sessionKey() + "/fullsource", widget_->viewFullSourceCB->isChecked());
settings.setValue(
sessionKey() + "/autoupdate", widget_->autoUpdateCB->isChecked());
}
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_->autoUpdateCB->setChecked(
settings.value(sessionKey() + "/autoupdate", true).toBool());
widget_->updateView();
}
Dialog * createGuiViewSource(GuiView & lv)
{
return new GuiViewSource(lv);
}
} // namespace frontend
} // namespace lyx
#include "moc_GuiViewSource.cpp"