lyx_mirror/src/frontends/qt4/GuiCommandBuffer.cpp
Stefan Schimanski 1bf7b59d60 * completion infrastructure
* completion support for mathed
* experimental completion support for text


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@23104 a592a061-630c-0410-9148-cb99ea01b6c8
2008-02-21 19:42:34 +00:00

331 lines
7.0 KiB
C++

/**
* \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 "GuiCommandEdit.h"
#include "GuiView.h"
#include "qt_helpers.h"
#include "BufferView.h"
#include "Cursor.h"
#include "LyXFunc.h"
#include "LyXAction.h"
#include "FuncRequest.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:
void mouseReleaseEvent(QMouseEvent * ev) {
if (ev->x() < 0 || ev->y() < 0
|| ev->x() > width() || ev->y() > height()) {
hide();
} else {
// emit signal
itemPressed(currentItem());
}
}
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
itemPressed(currentItem());
} else
QListWidget::keyPressEvent(ev);
}
};
} // end of anon
GuiCommandBuffer::GuiCommandBuffer(GuiView * view)
: view_(view), history_pos_(history_.end())
{
transform(lyxaction.func_begin(), lyxaction.func_end(),
back_inserter(commands_), firster());
QPixmap qpup(":/images/up.png");
QPixmap qpdown(":/images/down.png");
QVBoxLayout * top = new QVBoxLayout(this);
QHBoxLayout * layout = new QHBoxLayout(0);
QPushButton * up = new QPushButton(qpup, "", this);
up->setMaximumSize(24, 24);
QPushButton * down = new QPushButton(qpdown, "", this);
down->setToolTip(qt_("Next command"));
down->setMaximumSize(24, 24);
connect(down, SIGNAL(clicked()), this, SLOT(down()));
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(up, 0);
layout->addWidget(down, 0);
layout->addWidget(edit_, 10);
layout->setMargin(0);
top->addLayout(layout);
top->setMargin(0);
setFocusProxy(edit_);
}
void GuiCommandBuffer::cancel()
{
view_->setFocus();
edit_->setText(QString());
}
void GuiCommandBuffer::dispatch()
{
QString cmd = edit_->text();
view_->setFocus();
edit_->setText(QString());
edit_->clearFocus();
dispatch(fromqstr(cmd));
}
void GuiCommandBuffer::complete()
{
string const input = fromqstr(edit_->text());
string new_input;
vector<string> comp = completions(input, new_input);
if (comp.empty() && new_input == input) {
// show_info_suffix(qt_("[no match]"), input);
return;
}
if (comp.empty()) {
edit_->setText(toqstr(new_input));
// show_info_suffix(("[only completion]"), new_input + ' ');
return;
}
edit_->setText(toqstr(new_input));
QTempListBox * list = new QTempListBox;
// For some reason the scrollview's contents are larger
// than the number of actual items...
vector<string>::const_iterator cit = comp.begin();
vector<string>::const_iterator end = comp.end();
for (; cit != end; ++cit)
list->addItem(toqstr(*cit));
list->resize(list->sizeHint());
QPoint const pos = edit_->mapToGlobal(QPoint(0, 0));
int const y = max(0, pos.y() - list->height());
list->move(pos.x(), y);
connect(list, SIGNAL(itemPressed(QListWidgetItem *)),
this, SLOT(complete_selected(QListWidgetItem *)));
connect(list, SIGNAL(itemActivated(QListWidgetItem *)),
this, SLOT(complete_selected(QListWidgetItem *)));
list->show();
list->setFocus();
}
void GuiCommandBuffer::complete_selected(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()) {
// show_info_suffix(qt_("[Beginning of history]"), input);
} else {
edit_->setText(toqstr(h));
}
}
void GuiCommandBuffer::down()
{
string const input = fromqstr(edit_->text());
string const h = historyDown();
if (h.empty()) {
// show_info_suffix(qt_("[End of history]"), input);
} else {
edit_->setText(toqstr(h));
}
}
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_->view()->cursor().currentState();
}
void GuiCommandBuffer::hide() const
{
FuncRequest cmd(LFUN_COMMAND_EXECUTE, "off");
theLyXFunc().setLyXView(view_);
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(str);
history_pos_ = history_.end();
FuncRequest func = lyxaction.lookupFunc(str);
func.origin = FuncRequest::COMMANDBUFFER;
theLyXFunc().setLyXView(view_);
lyx::dispatch(func);
}
} // namespace frontend
} // namespace lyx
#include "GuiCommandBuffer_moc.cpp"