![Roland Knall](/assets/img/avatar_default.png)
Following the move for widgets directory, moving utils to the utils directory. Guidelines for this directory are: - Generic use but not a widget - Utility functionality used by many classes Note: additionally all includes affected by this move have been changed to absolute path includes, instead of relative ones. Change-Id: I019ae4b6e6f6d06a5745a63ed195edbd36fb936b Reviewed-on: https://code.wireshark.org/review/22602 Petri-Dish: Roland Knall <rknall@gmail.com> Reviewed-by: Roland Knall <rknall@gmail.com>
401 lines
12 KiB
C++
401 lines
12 KiB
C++
/* syntax_line_edit.cpp
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/prefs.h>
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#include <epan/proto.h>
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#include <epan/dfilter/dfilter.h>
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#include <epan/column-info.h>
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#include <ui/qt/widgets/syntax_line_edit.h>
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#include <ui/qt/utils/color_utils.h>
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#include <QAbstractItemView>
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#include <QCompleter>
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#include <QKeyEvent>
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#include <QScrollBar>
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#include <QStringListModel>
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#include <limits>
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// To do:
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// - Add indicator icons for syntax states to make things more clear for
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// color blind people?
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const int max_completion_items_ = 20;
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SyntaxLineEdit::SyntaxLineEdit(QWidget *parent) :
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QLineEdit(parent),
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completer_(NULL),
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completion_model_(NULL)
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{
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// Try to matche QLineEdit's placeholder text color (which sets the
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// alpha channel to 50%, which doesn't work in style sheets).
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// Setting the foreground color lets us avoid yet another background
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// color preference and should hopefully make things easier to
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// distinguish for color blind folk.
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busy_fg_ = ColorUtils::alphaBlend(palette().text(), palette().base(), 0.5);
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setSyntaxState();
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setMaxLength(std::numeric_limits<quint32>::max());
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}
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// Override setCompleter so that we don't clobber the filter text on activate.
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void SyntaxLineEdit::setCompleter(QCompleter *c)
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{
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if (completer_)
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QObject::disconnect(completer_, 0, this, 0);
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completer_ = c;
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if (!completer_)
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return;
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completer_->setWidget(this);
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completer_->setCompletionMode(QCompleter::PopupCompletion);
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completer_->setCaseSensitivity(Qt::CaseInsensitive);
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// Completion items are not guaranteed to be sorted (recent filters +
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// fields), so no setModelSorting.
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completer_->setMaxVisibleItems(max_completion_items_);
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QObject::connect(completer_, SIGNAL(activated(QString)),
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this, SLOT(insertFieldCompletion(QString)));
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}
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void SyntaxLineEdit::setSyntaxState(SyntaxState state) {
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syntax_state_ = state;
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state_style_sheet_ = QString(
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"SyntaxLineEdit[syntaxState=\"%1\"] {"
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" color: %5;"
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" background-color: %7;"
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"}"
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"SyntaxLineEdit[syntaxState=\"%2\"] {"
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" color: %5;"
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" background-color: %8;"
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"}"
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"SyntaxLineEdit[syntaxState=\"%3\"] {"
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" color: %5;"
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" background-color: %9;"
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"}"
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"SyntaxLineEdit[syntaxState=\"%4\"] {"
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" color: %10;"
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" background-color: %6;"
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"}"
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)
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// CSS selectors
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.arg(Valid)
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.arg(Invalid)
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.arg(Deprecated)
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.arg(Busy)
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// Normal foreground / background
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.arg("palette(text)")
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.arg("palette(base)")
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// Special foreground / background
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.arg(ColorUtils::fromColorT(&prefs.gui_text_valid).name())
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.arg(ColorUtils::fromColorT(&prefs.gui_text_invalid).name())
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.arg(ColorUtils::fromColorT(&prefs.gui_text_deprecated).name())
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.arg(busy_fg_.name())
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;
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setStyleSheet(style_sheet_);
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}
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QString SyntaxLineEdit::syntaxErrorMessage() {
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return syntax_error_message_;
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}
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QString SyntaxLineEdit::styleSheet() const {
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return style_sheet_;
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}
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void SyntaxLineEdit::setStyleSheet(const QString &style_sheet) {
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style_sheet_ = style_sheet;
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QLineEdit::setStyleSheet(style_sheet_ + state_style_sheet_);
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}
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void SyntaxLineEdit::insertFilter(const QString &filter)
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{
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QString padded_filter = filter;
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if (hasSelectedText()) {
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backspace();
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}
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int pos = cursorPosition();
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if (pos > 0 && !text().at(pos - 1).isSpace()) {
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padded_filter.prepend(" ");
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}
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if (pos < text().length() - 1 && !text().at(pos + 1).isSpace()) {
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padded_filter.append(" ");
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}
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insert(padded_filter);
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}
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void SyntaxLineEdit::checkDisplayFilter(QString filter)
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{
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if (filter.isEmpty()) {
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setSyntaxState(SyntaxLineEdit::Empty);
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return;
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}
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dfilter_t *dfp = NULL;
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gchar *err_msg;
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if (dfilter_compile(filter.toUtf8().constData(), &dfp, &err_msg)) {
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GPtrArray *depr = NULL;
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if (dfp) {
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depr = dfilter_deprecated_tokens(dfp);
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}
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if (depr) {
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// You keep using that word. I do not think it means what you think it means.
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setSyntaxState(SyntaxLineEdit::Deprecated);
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/*
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* We're being lazy and only printing the first "problem" token.
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* Would it be better to print all of them?
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*/
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syntax_error_message_ = tr("\"%1\" may have unexpected results (see the User's Guide)")
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.arg((const char *) g_ptr_array_index(depr, 0));
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} else {
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setSyntaxState(SyntaxLineEdit::Valid);
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}
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} else {
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setSyntaxState(SyntaxLineEdit::Invalid);
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syntax_error_message_ = QString::fromUtf8(err_msg);
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g_free(err_msg);
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}
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dfilter_free(dfp);
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}
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void SyntaxLineEdit::checkFieldName(QString field)
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{
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if (field.isEmpty()) {
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setSyntaxState(SyntaxLineEdit::Empty);
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return;
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}
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char invalid_char = proto_check_field_name(field.toUtf8().constData());
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if (invalid_char) {
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setSyntaxState(SyntaxLineEdit::Invalid);
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} else {
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checkDisplayFilter(field);
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}
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}
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void SyntaxLineEdit::checkCustomColumn(QString fields)
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{
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if (fields.isEmpty()) {
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setSyntaxState(SyntaxLineEdit::Empty);
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return;
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}
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gchar **splitted_fields = g_regex_split_simple(COL_CUSTOM_PRIME_REGEX,
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fields.toUtf8().constData(), G_REGEX_ANCHORED, G_REGEX_MATCH_ANCHORED);
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for (guint i = 0; i < g_strv_length(splitted_fields); i++) {
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if (splitted_fields[i] && *splitted_fields[i]) {
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if (proto_check_field_name(splitted_fields[i]) != 0) {
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setSyntaxState(SyntaxLineEdit::Invalid);
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g_strfreev(splitted_fields);
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return;
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}
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}
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}
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g_strfreev(splitted_fields);
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checkDisplayFilter(fields);
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}
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void SyntaxLineEdit::checkInteger(QString number)
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{
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if (number.isEmpty()) {
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setSyntaxState(SyntaxLineEdit::Empty);
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return;
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}
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bool ok;
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text().toInt(&ok);
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if (ok) {
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setSyntaxState(SyntaxLineEdit::Valid);
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} else {
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setSyntaxState(SyntaxLineEdit::Invalid);
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}
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}
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bool SyntaxLineEdit::isComplexFilter(const QString &filter)
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{
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bool is_complex = false;
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for (int i = 0; i < filter.length(); i++) {
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if (!token_chars_.contains(filter.at(i))) {
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is_complex = true;
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break;
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}
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}
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// Don't complete the current filter.
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if (is_complex && filter.startsWith(text()) && filter.compare(text())) {
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return true;
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}
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return false;
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}
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bool SyntaxLineEdit::event(QEvent *event)
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{
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if (event->type() == QEvent::ShortcutOverride) {
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// You can't set time display formats while the display filter edit
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// has focus.
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// Keep shortcuts in the main window from stealing keyPressEvents
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// with Ctrl+Alt modifiers from us. This is a problem for many AltGr
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// combinations since they are delivered with Ctrl+Alt modifiers
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// instead of Qt::Key_AltGr and they tend to match the time display
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// format shortcuts.
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// Uncommenting the qDebug line below prints the following here:
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//
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// US Keyboard:
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// Ctrl+o: 79 QFlags<Qt::KeyboardModifiers>(ControlModifier) "\u000F"
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// Ctrl+Alt+2: 50 QFlags<Qt::KeyboardModifiers>(ControlModifier|AltModifier) "2"
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//
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// Swedish (Sweden) Keyboard:
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// Ctrl+o: 79 QFlags<Qt::KeyboardModifiers>(ControlModifier) "\u000F"
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// Ctrl+Alt+2: 64 QFlags<Qt::KeyboardModifiers>(ControlModifier|AltModifier) "@"
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// AltGr+{: 123 QFlags<Qt::KeyboardModifiers>(ControlModifier|AltModifier) "{"
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QKeyEvent* key_event = static_cast<QKeyEvent*>(event);
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// qDebug() << "=so" << key_event->key() << key_event->modifiers() << key_event->text();
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if (key_event->modifiers() == Qt::KeyboardModifiers(Qt::ControlModifier|Qt::AltModifier)) {
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event->accept();
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return true;
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}
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}
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return QLineEdit::event(event);
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}
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void SyntaxLineEdit::completionKeyPressEvent(QKeyEvent *event)
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{
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// Forward to the completer if needed...
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if (completer_ && completer_->popup()->isVisible()) {
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switch (event->key()) {
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case Qt::Key_Enter:
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case Qt::Key_Return:
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case Qt::Key_Tab:
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focusNextChild();
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break;
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case Qt::Key_Escape:
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case Qt::Key_Backtab:
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event->ignore();
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return;
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default:
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break;
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}
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}
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// ...otherwise process the key ourselves.
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SyntaxLineEdit::keyPressEvent(event);
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if (!completer_ || !completion_model_) return;
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// Do nothing on bare shift.
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if ((event->modifiers() & Qt::ShiftModifier) && event->text().isEmpty()) return;
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if (event->modifiers() & (Qt::ControlModifier | Qt::AltModifier | Qt::MetaModifier)) {
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completer_->popup()->hide();
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return;
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}
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QPoint token_coords(getTokenUnderCursor());
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QString token_word = text().mid(token_coords.x(), token_coords.y());
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buildCompletionList(token_word);
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if (completion_model_->stringList().length() < 1) {
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completer_->popup()->hide();
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return;
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}
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QRect cr = cursorRect();
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cr.setWidth(completer_->popup()->sizeHintForColumn(0)
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+ completer_->popup()->verticalScrollBar()->sizeHint().width());
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completer_->complete(cr);
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}
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void SyntaxLineEdit::completionFocusInEvent(QFocusEvent *event)
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{
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if (completer_)
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completer_->setWidget(this);
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SyntaxLineEdit::focusInEvent(event);
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}
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void SyntaxLineEdit::focusOutEvent(QFocusEvent *event)
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{
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if (completer_ && completer_->popup()->isVisible() && event->reason() == Qt::PopupFocusReason) {
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// Pretend we still have focus so that we'll draw our cursor.
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// If cursorRect() were more precise we could just draw the cursor
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// during a paintEvent.
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return;
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}
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QLineEdit::focusOutEvent(event);
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}
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void SyntaxLineEdit::insertFieldCompletion(const QString &completion_text)
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{
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if (!completer_) return;
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QPoint field_coords(getTokenUnderCursor());
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// Insert only if we have a matching field or if the entry is empty
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if (field_coords.y() < 1 && !text().isEmpty()) {
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completer_->popup()->hide();
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return;
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}
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QString new_text = text().replace(field_coords.x(), field_coords.y(), completion_text);
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setText(new_text);
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setCursorPosition(field_coords.x() + completion_text.length());
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emit textEdited(new_text);
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}
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QPoint SyntaxLineEdit::getTokenUnderCursor()
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{
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if (selectionStart() >= 0) return (QPoint(0,0));
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int pos = cursorPosition();
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int start = pos;
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int len = 0;
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while (start > 0 && token_chars_.contains(text().at(start -1))) {
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start--;
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len++;
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}
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while (pos < text().length() && token_chars_.contains(text().at(pos))) {
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pos++;
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len++;
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}
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return QPoint(start, len);
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}
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