Source file: src/edit_address_widget.cpp
/* Copyright (C) 2004-2009 Daniel Vérité
This file is part of Manitou-Mail (see http://www.manitou-mail.org)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/* This file contains implementations of edit_address_widget and email_completer classes */
#include "edit_address_widget.h"
#include "addresses.h"
#include "main.h"
#include <QTimer>
#include <QListWidget>
#include <QApplication>
#include <QKeyEvent>
#include <QScrollBar>
#include <QDesktopWidget>
edit_address_widget::edit_address_widget(QWidget* parent) : QLineEdit(parent)
{
m_timer=NULL;
popup = new QListWidget();
popup->setWindowFlags(Qt::Popup);
popup->setFocusPolicy(Qt::NoFocus);
popup->setFocusProxy(this);
popup->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
completer = new email_completer(this);
completer->popup=popup;
completer->lineedit=this;
this->installEventFilter(completer);
popup->installEventFilter(completer);
connect(popup, SIGNAL(itemClicked(QListWidgetItem*)),
completer, SLOT(completion_chosen(QListWidgetItem*)));
connect(popup, SIGNAL(clicked(QModelIndex)), popup, SLOT(hide()));
connect(this, SIGNAL(textEdited(const QString&)),
this, SLOT(check_completions(const QString&)));
}
edit_address_widget::~edit_address_widget()
{
}
void
edit_address_widget::show_popup()
{
QWidget* widget=this;
QRect rect;
const QRect screen = QApplication::desktop()->availableGeometry(widget);
Qt::LayoutDirection dir = widget->layoutDirection();
QPoint pos;
int rw, rh, w;
int h = (popup->sizeHintForRow(0) * qMin(7, popup->model()->rowCount()) + 3) + 3;
QScrollBar *hsb = popup->horizontalScrollBar();
if (hsb && hsb->isVisible())
h += popup->horizontalScrollBar()->sizeHint().height();
if (rect.isValid()) {
rh = rect.height();
w = rw = rect.width();
pos = widget->mapToGlobal(dir == Qt::RightToLeft ? rect.bottomRight() : rect.bottomLeft());
}
else {
rh = widget->height();
rw = widget->width();
pos = widget->mapToGlobal(QPoint(0, widget->height() - 2));
w = widget->width();
}
if ((pos.x() + rw) > (screen.x() + screen.width()))
pos.setX(screen.x() + screen.width() - w);
if (pos.x() < screen.x())
pos.setX(screen.x());
if (((pos.y() + rh) > (screen.y() + screen.height())) && ((pos.y() - h - rh) >= 0))
pos.setY(pos.y() - qMax(h, popup->minimumHeight()) - rh + 2);
popup->setGeometry(pos.x(), pos.y(), w, h);
if (!popup->isVisible()) {
popup->show();
}
}
void
edit_address_widget::show_completions()
{
QString prefix; // substring on which the completion is to be based
int pos = cursorPosition();
int start = completer->get_prefix_pos(text(), pos);
if (start>=0) {
prefix=text().mid(start, pos-start);
}
if (prefix.isEmpty()) {
// nothing to complete
if (popup->isVisible()) {
popup->clear();
popup->hide();
}
}
else {
mail_address_list completions;
if (completions.fetch_completions(prefix)) {
if (!completions.empty()) {
popup->clear();
mail_address_list::const_iterator iter;
for (iter = completions.begin(); iter != completions.end(); iter++) {
popup->addItem(QString("%1 <%2>").arg(iter->name()).arg(iter->email()));
}
show_popup();
}
else {
popup->clear();
popup->hide();
}
}
}
}
void
edit_address_widget::check_completions(const QString& newtext)
{
// Filter out control characters. A common character that can appear
// at this point is linefeed, and we don't want these in mail addresses
bool modified = false;
QString copy = newtext;
int j=0;
for (int i=0; i<newtext.length(); i++) {
if (!newtext.at(i).isPrint()) {
copy.remove(j, 1);
modified = true;
}
else
j++;
}
if (modified) {
setText(copy); // will not recurse
}
// Cancel the timer if it's already running.
if (m_timer)
delete m_timer;
m_timer = new QTimer(this);
m_timer->setSingleShot(true);
m_timer->setInterval(500);
connect(m_timer, SIGNAL(timeout()), this, SLOT(show_completions()));
m_timer->start();
}
email_completer::email_completer(QObject* parent) : QObject(parent)
{
eatFocusOut=true;
}
email_completer::~email_completer()
{
}
void
email_completer::completion_chosen(QListWidgetItem* item)
{
if (!item) return;
QString text= lineedit->text();
int pos = get_prefix_pos(text, lineedit->cursorPosition());
QString before = text.mid(0, pos);
QString after = text.mid(lineedit->cursorPosition());
lineedit->setText(before + item->text() + after);
}
int
email_completer::get_prefix_pos(const QString text, int cursor_pos)
{
if (cursor_pos==0)
return -1;
int pos = cursor_pos-1;
while (pos>=0 && text.at(pos).isLetterOrNumber()) {
pos--;
}
if (pos<0 || text.at(pos)==' ' || text.at(pos)==',')
return pos+1;
else
return -1;
}
bool email_completer::eventFilter(QObject* o, QEvent* e)
{
if (eatFocusOut && o==lineedit && e->type()==QEvent::FocusOut && popup->isVisible()) {
return true;
}
if (o != popup)
return QObject::eventFilter(o, e);
switch (e->type()) {
case QEvent::KeyPress:
{
int row=popup->currentRow();
QKeyEvent *ke = static_cast<QKeyEvent *>(e);
const int key = ke->key();
switch (key) {
case Qt::Key_End:
case Qt::Key_Home:
if (ke->modifiers() & Qt::ControlModifier)
return false;
break;
case Qt::Key_Up:
if (row>0) {
popup->setCurrentRow(row-1);
return true;
}
else if (popup->count()>0) {
popup->setCurrentRow(popup->count()-1);
return true;
}
else
return false;
case Qt::Key_Down:
if (row==popup->count()-1) {
popup->setCurrentRow(0);
return true;
}
else if (row < popup->count()-1) {
popup->setCurrentRow(row+1);
return true;
}
else
return false;
case Qt::Key_PageUp:
case Qt::Key_PageDown:
return false;
}
eatFocusOut = false;
(static_cast<QObject *>(lineedit))->event(ke);
eatFocusOut = true;
if (e->isAccepted() || !popup->isVisible()) {
// widget lost focus, hide the popup
if (!lineedit->hasFocus())
popup->hide();
if (e->isAccepted())
return true;
}
// default implementation for keys not handled by the widget when popup is open
switch (key) {
case Qt::Key_Return:
case Qt::Key_Enter:
case Qt::Key_Tab:
popup->hide();
if (popup->currentItem()) {
completion_chosen(popup->currentItem());
}
break;
case Qt::Key_F4:
if (ke->modifiers() & Qt::AltModifier)
popup->hide();
break;
case Qt::Key_Backtab:
case Qt::Key_Escape:
popup->hide();
break;
default:
break;
}
return true;
} // QEvent::KeyPress
break;
case QEvent::MouseButtonPress:
if (!popup->underMouse()) {
popup->hide();
return true;
}
case QEvent::InputMethod:
case QEvent::ShortcutOverride:
QApplication::sendEvent(lineedit, e);
break;
default:
return false;
}
return false;
}
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