lyx_mirror/src/frontends/qt4/GuiCommandBuffer.cpp

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/**
* \file GuiCommandBuffer.cpp
* This file is part of LyX, the document processor.
* Licence details can be found in the file COPYING.
*
* \author Lars
* \author Asger and Jürgen
* \author John Levon
*
* Full author contact details are available in file CREDITS.
*/
#include <config.h>
#include "GuiCommandBuffer.h"
#include "GuiApplication.h"
#include "GuiCommandEdit.h"
#include "GuiView.h"
#include "qt_helpers.h"
#include "BufferView.h"
#include "Cursor.h"
#include "LyX.h"
#include "LyXAction.h"
#include "FuncRequest.h"
#include "Session.h"
#include "support/lyxalgo.h"
#include "support/lstrings.h"
#include <QHBoxLayout>
#include <QKeyEvent>
#include <QListWidget>
#include <QMouseEvent>
#include <QPixmap>
#include <QPushButton>
#include <QToolTip>
#include <QVBoxLayout>
using namespace std;
using namespace lyx::support;
namespace lyx {
namespace frontend {
namespace {
class QTempListBox : public QListWidget {
public:
QTempListBox() {
//setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOn);
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
setWindowModality(Qt::WindowModal);
setWindowFlags(Qt::Popup);
setAttribute(Qt::WA_DeleteOnClose);
}
protected:
bool event(QEvent * ev) {
if (ev->type() == QEvent::MouseButtonPress) {
QMouseEvent * me = static_cast<QMouseEvent *>(ev);
if (me->x() < 0 || me->y() < 0
|| me->x() > width() || me->y() > height())
hide();
return true;
}
return QListWidget::event(ev);
}
void keyPressEvent(QKeyEvent * ev) {
if (ev->key() == Qt::Key_Escape) {
hide();
return;
} else if (ev->key() == Qt::Key_Return || ev->key() == Qt::Key_Space) {
// emit signal
itemClicked(currentItem());
} else
QListWidget::keyPressEvent(ev);
}
};
} // end of anon
GuiCommandBuffer::GuiCommandBuffer(GuiView * view)
: view_(view)
{
transform(lyxaction.func_begin(), lyxaction.func_end(),
back_inserter(commands_), firster());
QPixmap qpup = getPixmap("images/", "up", "png");
QPixmap qpdown = getPixmap("images/", "down", "png");
QVBoxLayout * top = new QVBoxLayout(this);
QHBoxLayout * layout = new QHBoxLayout(0);
upPB = new QPushButton(qpup, "", this);
upPB->setToolTip(qt_("List of previous commands"));
upPB->setMaximumSize(24, 24);
downPB = new QPushButton(qpdown, "", this);
downPB->setToolTip(qt_("Next command"));
downPB->setMaximumSize(24, 24);
downPB->setEnabled(false);
connect(downPB, SIGNAL(clicked()), this, SLOT(down()));
connect(upPB, SIGNAL(pressed()), this, SLOT(listHistoryUp()));
edit_ = new GuiCommandEdit(this);
edit_->setMinimumSize(edit_->sizeHint());
edit_->setFocusPolicy(Qt::ClickFocus);
connect(edit_, SIGNAL(escapePressed()), this, SLOT(cancel()));
connect(edit_, SIGNAL(returnPressed()), this, SLOT(dispatch()));
connect(edit_, SIGNAL(tabPressed()), this, SLOT(complete()));
connect(edit_, SIGNAL(upPressed()), this, SLOT(up()));
connect(edit_, SIGNAL(downPressed()), this, SLOT(down()));
connect(edit_, SIGNAL(hidePressed()), this, SLOT(hideParent()));
layout->addWidget(upPB, 0);
layout->addWidget(downPB, 0);
layout->addWidget(edit_, 10);
layout->setMargin(0);
top->addLayout(layout);
top->setMargin(0);
setFocusProxy(edit_);
LastCommandsSection::LastCommands last_commands
= theSession().lastCommands().getcommands();
LastCommandsSection::LastCommands::const_iterator it
= last_commands.begin();
LastCommandsSection::LastCommands::const_iterator end
= last_commands.end();
upPB->setEnabled(it != end);
for(; it != end; ++it)
history_.push_back(*it);
history_pos_ = history_.end();
}
void GuiCommandBuffer::cancel()
{
view_->setFocus();
edit_->setText(QString());
}
void GuiCommandBuffer::dispatch()
{
QString cmd = edit_->text();
view_->setFocus();
edit_->setText(QString());
edit_->clearFocus();
std::string const cmd_ = fromqstr(cmd);
theSession().lastCommands().add(cmd_);
dispatch(cmd_);
}
void GuiCommandBuffer::listHistoryUp()
{
if (history_.size()==1) {
edit_->setText(toqstr(history_.back()));
upPB->setEnabled(false);
return;
}
QPoint const & pos = upPB->mapToGlobal(QPoint(0, 0));
showList(history_, pos, true);
}
void GuiCommandBuffer::complete()
{
string const input = fromqstr(edit_->text());
string new_input;
vector<string> const & comp = completions(input, new_input);
if (comp.empty()) {
if (new_input != input)
edit_->setText(toqstr(new_input));
return;
}
edit_->setText(toqstr(new_input));
QPoint const & pos = edit_->mapToGlobal(QPoint(0, 0));
showList(comp, pos);
}
void GuiCommandBuffer::showList(vector<string> const & list,
QPoint const & pos, bool reversed) const
{
QTempListBox * listBox = new QTempListBox;
// For some reason the scrollview's contents are larger
// than the number of actual items...
vector<string>::const_iterator cit = list.begin();
vector<string>::const_iterator end = list.end();
for (; cit != end; ++cit) {
if (reversed)
listBox->insertItem(0, toqstr(*cit));
else
listBox->addItem(toqstr(*cit));
}
listBox->resize(listBox->sizeHint());
int const y = max(0, pos.y() - listBox->height());
listBox->move(pos.x(), y);
connect(listBox, SIGNAL(itemClicked(QListWidgetItem *)),
this, SLOT(itemSelected(QListWidgetItem *)));
connect(listBox, SIGNAL(itemActivated(QListWidgetItem *)),
this, SLOT(itemSelected(QListWidgetItem *)));
listBox->show();
listBox->setFocus();
}
void GuiCommandBuffer::itemSelected(QListWidgetItem * item)
{
QWidget const * widget = static_cast<QWidget const *>(sender());
const_cast<QWidget *>(widget)->hide();
edit_->setText(item->text()+ ' ');
edit_->activateWindow();
edit_->setFocus();
}
void GuiCommandBuffer::up()
{
string const input = fromqstr(edit_->text());
string const h = historyUp();
if (!h.empty())
edit_->setText(toqstr(h));
upPB->setEnabled(history_pos_ != history_.begin());
downPB->setEnabled(history_pos_ != history_.end());
}
void GuiCommandBuffer::down()
{
string const input = fromqstr(edit_->text());
string const h = historyDown();
if (!h.empty())
edit_->setText(toqstr(h));
downPB->setEnabled(!history_.empty()
&& history_pos_ != history_.end() - 1);
upPB->setEnabled(history_pos_ != history_.begin());
}
void GuiCommandBuffer::hideParent()
{
view_->setFocus();
edit_->setText(QString());
edit_->clearFocus();
hide();
}
namespace {
class prefix_p {
public:
string p;
prefix_p(string const & s) : p(s) {}
bool operator()(string const & s) const { return prefixIs(s, p); }
};
} // end of anon namespace
string const GuiCommandBuffer::historyUp()
{
if (history_pos_ == history_.begin())
return string();
return *(--history_pos_);
}
string const GuiCommandBuffer::historyDown()
{
if (history_pos_ == history_.end())
return string();
if (history_pos_ + 1 == history_.end())
return string();
return *(++history_pos_);
}
docstring const GuiCommandBuffer::getCurrentState() const
{
return view_->currentBufferView()->cursor().currentState();
}
void GuiCommandBuffer::hide() const
{
FuncRequest cmd(LFUN_COMMAND_EXECUTE, "off");
lyx::dispatch(cmd);
}
vector<string> const
GuiCommandBuffer::completions(string const & prefix, string & new_prefix)
{
vector<string> comp;
copy_if(commands_.begin(), commands_.end(),
back_inserter(comp), prefix_p(prefix));
if (comp.empty()) {
new_prefix = prefix;
return comp;
}
if (comp.size() == 1) {
new_prefix = comp[0];
return vector<string>();
}
// find maximal available prefix
string const tmp = comp[0];
string test = prefix;
if (tmp.length() > test.length())
test += tmp[test.length()];
while (test.length() < tmp.length()) {
vector<string> vtmp;
copy_if(comp.begin(), comp.end(),
back_inserter(vtmp), prefix_p(test));
if (vtmp.size() != comp.size()) {
test.erase(test.length() - 1);
break;
}
test += tmp[test.length()];
}
new_prefix = test;
return comp;
}
void GuiCommandBuffer::dispatch(string const & str)
{
if (str.empty())
return;
history_.push_back(trim(str));
history_pos_ = history_.end();
upPB->setEnabled(history_pos_ != history_.begin());
downPB->setEnabled(history_pos_ != history_.end());
FuncRequest func = lyxaction.lookupFunc(str);
func.origin = FuncRequest::COMMANDBUFFER;
lyx::dispatch(func);
}
} // namespace frontend
} // namespace lyx
#include "moc_GuiCommandBuffer.cpp"