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wireshark/ui/qt/display_filter_edit.cpp

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/* display_filter_edit.cpp
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <glib.h>
#include <epan/dfilter/dfilter.h>
#include <ui/filters.h>
#include "ui/utf8_entities.h"
#include "display_filter_edit.h"
#include "syntax_line_edit.h"
#include <QAbstractItemView>
#include <QComboBox>
#include <QCompleter>
#include <QEvent>
#include <QPainter>
#include <QStringListModel>
#include <QStyleOptionFrame>
#include <QToolButton>
#include "ui/utf8_entities.h"
// To do:
// - Implement the bookmark button.
// - Add @2x icons or find a nice set of license-compatible glyph icons and use them instead.
// - We need simplified (button- and dropdown-free) versions for use in dialogs and field-only checking.
// - Move bookmark and apply buttons to the toolbar a la Firefox, Chrome & Safari?
// - Use native buttons on OS X?
// - Add a separator or otherwise distinguish between recent items and fields
// in the completion dropdown.
#if defined(Q_OS_MAC) && 0
// http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/ApplicationKit/Classes/NSImage_Class/Reference/Reference.html
// http://www.virtualbox.org/svn/vbox/trunk/src/VBox/Frontends/VirtualBox/src/platform/darwin/UICocoaSpecialControls.mm
class UIMiniCancelButton: public QAbstractButton
{
Q_OBJECT;
public:
UIMiniCancelButton(QWidget *pParent = 0);
void setText(const QString &strText) { m_pButton->setText(strText); }
void setToolTip(const QString &strTip) { m_pButton->setToolTip(strTip); }
void removeBorder() {}
protected:
void paintEvent(QPaintEvent * /* pEvent */) {}
void resizeEvent(QResizeEvent *pEvent);
private:
UICocoaButton *m_pButton;
};
UIMiniCancelButton::UIMiniCancelButton(QWidget *pParent /* = 0 */)
: QAbstractButton(pParent)
{
setShortcut(QKeySequence(Qt::Key_Escape));
m_pButton = new UICocoaButton(UICocoaButton::CancelButton, this);
connect(m_pButton, SIGNAL(clicked()),
this, SIGNAL(clicked()));
setFixedSize(m_pButton->size());
}
#endif
#ifdef __APPLE__
#define DEFAULT_MODIFIER UTF8_PLACE_OF_INTEREST_SIGN
#else
#define DEFAULT_MODIFIER "Ctrl-"
#endif
// proto.c:fld_abbrev_chars
static const QString fld_abbrev_chars_ = "-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz";
DisplayFilterEdit::DisplayFilterEdit(QWidget *parent, bool plain) :
SyntaxLineEdit(parent),
plain_(plain),
apply_button_(NULL)
{
setAccessibleName(tr("Display filter entry"));
completion_model_ = new QStringListModel(this);
setCompleter(new QCompleter(completion_model_, this));
setCompletionTokenChars(fld_abbrev_chars_);
if (plain_) {
placeholder_text_ = QString(tr("Enter a display filter %1")).arg(UTF8_HORIZONTAL_ELLIPSIS);
} else {
placeholder_text_ = QString(tr("Apply a display filter %1 <%2/>")).arg(UTF8_HORIZONTAL_ELLIPSIS)
.arg(DEFAULT_MODIFIER);
}
#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
setPlaceholderText(placeholder_text_);
#endif
// DFCombo
// Bookmark (star)
// DispalyFilterEdit
// Clear button
// Apply (right arrow) + Cancel (x) + Reload (arrowed circle)
// Combo drop-down
bookmark_button_ = new QToolButton(this);
bookmark_button_->setEnabled(false);
bookmark_button_->setCursor(Qt::ArrowCursor);
bookmark_button_->setStyleSheet(QString(
"QToolButton { /* all types of tool button */"
" border 0 0 0 0;"
#ifdef Q_OS_MAC
" border-right: %1px solid gray;"
#else
" border-right: %1px solid palette(shadow);"
#endif
" border-top-left-radius: 3px;"
" border-bottom-left-radius: 3px;"
" padding-left: 1px;"
" image: url(:/dfilter/dfilter_bookmark_normal.png) center;"
"}"
"QToolButton:hover {"
" image: url(:/dfilter/dfilter_bookmark_hover.png) center;"
"}"
"QToolButton:pressed {"
" image: url(:/dfilter/dfilter_bookmark_pressed.png) center;"
"}"
"QToolButton:disabled {"
" image: url(:/dfilter/dfilter_bookmark_disabled.png) center;"
"}"
).arg(plain_ ? 0 : 1)
);
#ifndef QT_NO_TOOLTIP
bookmark_button_->setToolTip(tr("Bookmark this filter string"));
#endif // QT_NO_TOOLTIP
connect(bookmark_button_, SIGNAL(clicked()), this, SLOT(bookmarkClicked()));
clear_button_ = new QToolButton(this);
clear_button_->setCursor(Qt::ArrowCursor);
clear_button_->setStyleSheet(
"QToolButton {"
" image: url(:/dfilter/dfilter_erase_normal.png) center;"
" border: none;"
" width: 16px;"
"}"
"QToolButton:hover {"
" image: url(:/dfilter/dfilter_erase_active.png) center;"
"}"
"QToolButton:pressed {"
" image: url(:/dfilter/dfilter_erase_selected.png) center;"
"}"
);
#ifndef QT_NO_TOOLTIP
clear_button_->setToolTip(tr("Clear the filter string and update the display"));
#endif // QT_NO_TOOLTIP
clear_button_->hide();
connect(clear_button_, SIGNAL(clicked()), this, SLOT(clearFilter()));
connect(this, SIGNAL(textChanged(const QString&)), this, SLOT(checkFilter(const QString&)));
if (!plain_) {
apply_button_ = new QToolButton(this);
apply_button_->setCursor(Qt::ArrowCursor);
apply_button_->setEnabled(false);
apply_button_->setStyleSheet(
"QToolButton { /* all types of tool button */"
" border 0 0 0 0;"
" border-top-right-radius: 3px;"
" border-bottom-right-radius: 3px;"
" padding-right: 1px;"
" image: url(:/dfilter/dfilter_apply_normal.png) center;"
"}"
"QToolButton:hover {"
" image: url(:/dfilter/dfilter_apply_hover.png) center;"
"}"
"QToolButton:pressed {"
" image: url(:/dfilter/dfilter_apply_pressed.png) center;"
"}"
"QToolButton:disabled {"
" image: url(:/dfilter/dfilter_apply_disabled.png) center;"
"}"
);
#ifndef QT_NO_TOOLTIP
apply_button_->setToolTip(tr("Apply this filter string to the display"));
#endif // QT_NO_TOOLTIP
connect(apply_button_, SIGNAL(clicked()), this, SLOT(applyDisplayFilter()));
connect(this, SIGNAL(returnPressed()), this, SLOT(applyDisplayFilter()));
}
int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
QSize bksz = bookmark_button_->sizeHint();
QSize cbsz = clear_button_->sizeHint();
QSize apsz;
if (apply_button_) {
apsz = apply_button_->sizeHint();
} else {
apsz.setHeight(0); apsz.setWidth(0);
}
setStyleSheet(QString(
"DisplayFilterEdit {"
" padding-left: %1px;"
" margin-left: %2px;"
" margin-right: %3px;"
"}"
)
.arg(frameWidth + 1)
.arg(bksz.width())
.arg(cbsz.width() + apsz.width() + frameWidth + 1)
);
}
#if QT_VERSION < QT_VERSION_CHECK(4, 7, 0)
void DisplayFilterEdit::paintEvent(QPaintEvent *evt) {
SyntaxLineEdit::paintEvent(evt);
// http://wiki.forum.nokia.com/index.php/Custom_QLineEdit
if (text().isEmpty() && ! this->hasFocus()) {
QPainter p(this);
QFont f = font();
f.setItalic(true);
p.setFont(f);
QColor color(palette().color(foregroundRole()));
color.setAlphaF(0.5);
p.setPen(color);
QStyleOptionFrame opt;
initStyleOption(&opt);
QRect cr = style()->subElementRect(QStyle::SE_LineEditContents, &opt, this);
cr.setLeft(cr.left() + 2);
cr.setRight(cr.right() - 2);
p.drawText(cr, Qt::AlignLeft|Qt::AlignVCenter, placeholder_text_);
}
// else check filter syntax and set the background accordingly
// XXX - Should we add little warning/error icons as well?
}
#endif // QT < 4.7
void DisplayFilterEdit::resizeEvent(QResizeEvent *)
{
QSize cbsz = clear_button_->sizeHint();
QSize apsz;
if (apply_button_) {
apsz = apply_button_->sizeHint();
} else {
apsz.setHeight(0); apsz.setWidth(0);
}
int frameWidth = style()->pixelMetric(QStyle::PM_DefaultFrameWidth);
clear_button_->move(contentsRect().right() - frameWidth - cbsz.width() - apsz.width(),
contentsRect().top());
clear_button_->setMaximumHeight(contentsRect().height());
if (apply_button_) {
apply_button_->move(contentsRect().right() - frameWidth - apsz.width(),
contentsRect().top());
apply_button_->setMaximumHeight(contentsRect().height());
}
bookmark_button_->setMaximumHeight(contentsRect().height());
}
void DisplayFilterEdit::focusOutEvent(QFocusEvent *event)
{
if (syntaxState() == Valid)
emit popFilterSyntaxStatus();
SyntaxLineEdit::focusOutEvent(event);
}
void DisplayFilterEdit::checkFilter(const QString& text)
{
clear_button_->setVisible(!text.isEmpty());
popFilterSyntaxStatus();
checkDisplayFilter(text);
switch (syntaxState()) {
case Deprecated:
{
/*
* We're being lazy and only printing the first "problem" token.
* Would it be better to print all of them?
*/
QString deprecatedMsg(tr("\"%1\" may have unexpected results (see the User's Guide)")
.arg(deprecatedToken()));
emit pushFilterSyntaxWarning(deprecatedMsg);
break;
}
case Invalid:
{
QString invalidMsg(tr("Invalid filter: "));
invalidMsg.append(syntaxErrorMessage());
emit pushFilterSyntaxStatus(invalidMsg);
break;
}
default:
break;
}
bookmark_button_->setEnabled(syntaxState() == Valid || syntaxState() == Deprecated);
if (apply_button_) {
apply_button_->setEnabled(SyntaxState() != Invalid);
}
}
// GTK+ behavior:
// - Operates on words (proto.c:fld_abbrev_chars).
// - Popup appears when you enter or remove text.
// Our behavior:
// - Operates on words (fld_abbrev_chars_).
// - Popup appears when you enter or remove text.
// - Popup appears when you move the cursor.
// - Popup does not appear when text is selected.
// - Recent and saved display filters in popup when editing first word.
// ui/gtk/filter_autocomplete.c:build_autocompletion_list
void DisplayFilterEdit::buildCompletionList(const QString &field_word)
{
// Push a hint about the current field.
if (syntaxState() == Valid) {
emit popFilterSyntaxStatus();
header_field_info *hfinfo = proto_registrar_get_byname(field_word.toUtf8().constData());
if (hfinfo) {
QString cursor_field_msg = QString("%1: %2")
.arg(hfinfo->name)
.arg(ftype_pretty_name(hfinfo->type));
emit pushFilterSyntaxStatus(cursor_field_msg);
}
}
if (field_word.length() < 1) {
completion_model_->setStringList(QStringList());
return;
}
// Grab matching display filters from our parent combo and from the
// saved display filters file. Skip ones that look like single fields
// and assume they will be added below.
QStringList complex_list;
QComboBox *df_combo = qobject_cast<QComboBox *>(parent());
if (df_combo) {
for (int i = 0; i < df_combo->count() ; i++) {
QString recent_filter = df_combo->itemText(i);
if (isComplexFilter(recent_filter)) {
complex_list << recent_filter;
}
}
}
for (const GList *df_item = get_filter_list_first(DFILTER_LIST); df_item; df_item = g_list_next(df_item)) {
const filter_def *df_def = (filter_def *) df_item->data;
if (!df_def || !df_def->strval) continue;
QString saved_filter = df_def->strval;
if (isComplexFilter(saved_filter) && !complex_list.contains(saved_filter)) {
complex_list << saved_filter;
}
}
completion_model_->setStringList(complex_list);
completer()->setCompletionPrefix(field_word);
void *proto_cookie;
QStringList field_list;
int field_dots = field_word.count('.'); // Some protocol names (_ws.expert) contain periods.
for (int proto_id = proto_get_first_protocol(&proto_cookie); proto_id != -1; proto_id = proto_get_next_protocol(&proto_cookie)) {
protocol_t *protocol = find_protocol_by_id(proto_id);
if (!proto_is_protocol_enabled(protocol)) continue;
// Don't complete the current word.
const QString pfname = proto_get_protocol_filter_name(proto_id);
if (field_word.compare(pfname)) field_list << pfname;
// Add fields only if we're past the protocol name and only for the
// current protocol.
if (field_dots > pfname.count('.')) {
void *field_cookie;
const QByteArray fw_ba = field_word.toUtf8(); // or toLatin1 or toStdString?
const char *fw_utf8 = fw_ba.constData();
gsize fw_len = (gsize) strlen(fw_utf8);
for (header_field_info *hfinfo = proto_get_first_protocol_field(proto_id, &field_cookie); hfinfo; hfinfo = proto_get_next_protocol_field(proto_id, &field_cookie)) {
if (hfinfo->same_name_prev_id != -1) continue; // Ignore duplicate names.
if (!g_ascii_strncasecmp(fw_utf8, hfinfo->abbrev, fw_len)) {
if ((gsize) strlen(hfinfo->abbrev) != fw_len) field_list << hfinfo->abbrev;
}
}
}
}
field_list.sort();
completion_model_->setStringList(complex_list + field_list);
completer()->setCompletionPrefix(field_word);
}
void DisplayFilterEdit::bookmarkClicked()
{
emit addBookmark(text());
}
void DisplayFilterEdit::clearFilter()
{
clear();
QString new_filter;
emit filterPackets(new_filter, true);
}
void DisplayFilterEdit::applyDisplayFilter()
{
if (syntaxState() != Valid && syntaxState() != Empty) {
return;
}
QString new_filter = text();
emit filterPackets(new_filter, true);
}
void DisplayFilterEdit::displayFilterSuccess(bool success)
{
apply_button_->setEnabled(!success);
}
void DisplayFilterEdit::changeEvent(QEvent* event)
{
if (0 != event)
{
switch (event->type())
{
case QEvent::LanguageChange:
if (plain_) {
placeholder_text_ = QString(tr("Enter a display filter %1")).
arg(UTF8_HORIZONTAL_ELLIPSIS);
} else {
placeholder_text_ = QString(tr("Apply a display filter %1 <%2/>"))
.arg(UTF8_HORIZONTAL_ELLIPSIS).arg(DEFAULT_MODIFIER);
}
#if QT_VERSION >= QT_VERSION_CHECK(4, 7, 0)
setPlaceholderText(placeholder_text_);
#endif
break;
default:
break;
}
}
SyntaxLineEdit::changeEvent(event);
}
/*
* Editor modelines
*
* Local Variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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