source: trunk/tools/assistant/lib/qhelpsearchquerywidget.cpp@ 280

Last change on this file since 280 was 2, checked in by Dmitry A. Kuminov, 16 years ago

Initially imported qt-all-opensource-src-4.5.1 from Trolltech.
File size: 11.9 KB
Line 
1/****************************************************************************
2**
3** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
4** Contact: Qt Software Information ([email protected])
5**
6** This file is part of the Qt Assistant of the Qt Toolkit.
7**
8** $QT_BEGIN_LICENSE:LGPL$
9** Commercial Usage
10** Licensees holding valid Qt Commercial licenses may use this file in
11** accordance with the Qt Commercial License Agreement provided with the
12** Software or, alternatively, in accordance with the terms contained in
13** a written agreement between you and Nokia.
14**
15** GNU Lesser General Public License Usage
16** Alternatively, this file may be used under the terms of the GNU Lesser
17** General Public License version 2.1 as published by the Free Software
18** Foundation and appearing in the file LICENSE.LGPL included in the
19** packaging of this file. Please review the following information to
20** ensure the GNU Lesser General Public License version 2.1 requirements
21** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
22**
23** In addition, as a special exception, Nokia gives you certain
24** additional rights. These rights are described in the Nokia Qt LGPL
25** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
26** package.
27**
28** GNU General Public License Usage
29** Alternatively, this file may be used under the terms of the GNU
30** General Public License version 3.0 as published by the Free Software
31** Foundation and appearing in the file LICENSE.GPL included in the
32** packaging of this file. Please review the following information to
33** ensure the GNU General Public License version 3.0 requirements will be
34** met: http://www.gnu.org/copyleft/gpl.html.
35**
36** If you are unsure which license is appropriate for your use, please
37** contact the sales department at [email protected].
38** $QT_END_LICENSE$
39**
40****************************************************************************/
41
42#include "qhelpsearchquerywidget.h"
43
44#include <QtCore/QDebug>
45
46#include <QtCore/QObject>
47#include <QtCore/QStringList>
48
49#include <QtGui/QLabel>
50#include <QtGui/QLayout>
51#include <QtGui/QLineEdit>
52#include <QtGui/QFocusEvent>
53#include <QtGui/QPushButton>
54#include <QtGui/QToolButton>
55
56QT_BEGIN_NAMESPACE
57
58class QHelpSearchQueryWidgetPrivate : public QObject
59{
60 Q_OBJECT
61
62private:
63 QHelpSearchQueryWidgetPrivate()
64 : QObject()
65 {
66 searchButton = 0;
67 advancedSearchWidget = 0;
68 showHideAdvancedSearchButton = 0;
69 defaultQuery = 0;
70 exactQuery = 0;
71 similarQuery = 0;
72 withoutQuery = 0;
73 allQuery = 0;
74 atLeastQuery = 0;
75 }
76
77 ~QHelpSearchQueryWidgetPrivate()
78 {
79 // nothing todo
80 }
81
82 QString escapeString(const QString &text)
83 {
84 QString retValue = text;
85 const QString escape(QLatin1String("\\"));
86 QStringList escapableCharsList;
87 escapableCharsList << QLatin1String("\\") << QLatin1String("+")
88 << QLatin1String("-") << QLatin1String("!") << QLatin1String("(")
89 << QLatin1String(")") << QLatin1String(":") << QLatin1String("^")
90 << QLatin1String("[") << QLatin1String("]") << QLatin1String("{")
91 << QLatin1String("}") << QLatin1String("~");
92
93 // make sure we won't end up with an empty string
94 foreach (const QString escapeChar, escapableCharsList) {
95 if (retValue.contains(escapeChar))
96 retValue.replace(escapeChar, QLatin1String(""));
97 }
98 if (retValue.trimmed().isEmpty())
99 return retValue;
100
101 retValue = text; // now realy escape the string...
102 foreach (const QString escapeChar, escapableCharsList) {
103 if (retValue.contains(escapeChar))
104 retValue.replace(escapeChar, escape + escapeChar);
105 }
106 return retValue;
107 }
108
109 QStringList buildTermList(const QString query)
110 {
111 bool s = false;
112 QString phrase;
113 QStringList wordList;
114 QString searchTerm = query;
115
116 for (int i = 0; i < searchTerm.length(); ++i) {
117 if (searchTerm[i] == QLatin1Char('\"') && !s) {
118 s = true;
119 phrase = searchTerm[i];
120 continue;
121 }
122 if (searchTerm[i] != QLatin1Char('\"') && s)
123 phrase += searchTerm[i];
124 if (searchTerm[i] == QLatin1Char('\"') && s) {
125 s = false;
126 phrase += searchTerm[i];
127 wordList.append(phrase);
128 searchTerm.remove(phrase);
129 }
130 }
131 if (s)
132 searchTerm.replace(phrase, phrase.mid(1));
133
134 const QRegExp exp(QLatin1String("\\s+"));
135 wordList += searchTerm.split(exp, QString::SkipEmptyParts);
136 return wordList;
137 }
138
139private slots:
140 void showHideAdvancedSearch()
141 {
142 bool hidden = advancedSearchWidget->isHidden();
143 if (hidden) {
144 advancedSearchWidget->show();
145 showHideAdvancedSearchButton->setText((QLatin1String("-")));
146 } else {
147 advancedSearchWidget->hide();
148 showHideAdvancedSearchButton->setText((QLatin1String("+")));
149 }
150
151 defaultQuery->setEnabled(!hidden);
152 }
153
154private:
155 friend class QHelpSearchQueryWidget;
156
157 QPushButton *searchButton;
158 QWidget* advancedSearchWidget;
159 QToolButton *showHideAdvancedSearchButton;
160 QLineEdit *defaultQuery;
161 QLineEdit *exactQuery;
162 QLineEdit *similarQuery;
163 QLineEdit *withoutQuery;
164 QLineEdit *allQuery;
165 QLineEdit *atLeastQuery;
166};
167
168#include "qhelpsearchquerywidget.moc"
169
170
171/*!
172 \class QHelpSearchQueryWidget
173 \since 4.4
174 \inmodule QtHelp
175 \brief The QHelpSearchQueryWidget class provides a simple line edit or
176 an advanced widget to enable the user to input a search term in a
177 standardized input mask.
178*/
179
180/*!
181 \fn void QHelpSearchQueryWidget::search()
182
183 This signal is emitted when a the user has the search button invoked.
184 After reciving the signal you can ask the QHelpSearchQueryWidget for the build list
185 of QHelpSearchQuery's that you may pass to the QHelpSearchEngine's search() function.
186*/
187
188/*!
189 Constructs a new search query widget with the given \a parent.
190*/
191QHelpSearchQueryWidget::QHelpSearchQueryWidget(QWidget *parent)
192 : QWidget(parent)
193{
194 d = new QHelpSearchQueryWidgetPrivate();
195
196 QVBoxLayout *vLayout = new QVBoxLayout(this);
197 vLayout->setMargin(0);
198
199 QHBoxLayout* hBoxLayout = new QHBoxLayout();
200 QLabel *label = new QLabel(tr("Search for:"), this);
201 d->defaultQuery = new QLineEdit(this);
202 d->searchButton = new QPushButton(tr("Search"), this);
203 hBoxLayout->addWidget(label);
204 hBoxLayout->addWidget(d->defaultQuery);
205 hBoxLayout->addWidget(d->searchButton);
206
207 vLayout->addLayout(hBoxLayout);
208
209 connect(d->searchButton, SIGNAL(clicked()), this, SIGNAL(search()));
210 connect(d->defaultQuery, SIGNAL(returnPressed()), this, SIGNAL(search()));
211
212#if defined(QT_CLUCENE_SUPPORT)
213 hBoxLayout = new QHBoxLayout();
214 d->showHideAdvancedSearchButton = new QToolButton(this);
215 d->showHideAdvancedSearchButton->setText(QLatin1String("+"));
216 d->showHideAdvancedSearchButton->setMinimumSize(25, 20);
217
218 label = new QLabel(tr("Advanced search"), this);
219 QSizePolicy sizePolicy(QSizePolicy::Maximum, QSizePolicy::Preferred);
220 sizePolicy.setHeightForWidth(label->sizePolicy().hasHeightForWidth());
221 label->setSizePolicy(sizePolicy);
222
223 QFrame* hLine = new QFrame(this);
224 hLine->setFrameStyle(QFrame::HLine);
225 hBoxLayout->addWidget(d->showHideAdvancedSearchButton);
226 hBoxLayout->addWidget(label);
227 hBoxLayout->addWidget(hLine);
228
229 vLayout->addLayout(hBoxLayout);
230
231 // setup advanced search layout
232 d->advancedSearchWidget = new QWidget(this);
233 QGridLayout *gLayout = new QGridLayout(d->advancedSearchWidget);
234 gLayout->setMargin(0);
235
236 label = new QLabel(tr("words <B>similar</B> to:"), this);
237 gLayout->addWidget(label, 0, 0);
238 d->similarQuery = new QLineEdit(this);
239 gLayout->addWidget(d->similarQuery, 0, 1);
240
241 label = new QLabel(tr("<B>without</B> the words:"), this);
242 gLayout->addWidget(label, 1, 0);
243 d->withoutQuery = new QLineEdit(this);
244 gLayout->addWidget(d->withoutQuery, 1, 1);
245
246 label = new QLabel(tr("with <B>exact phrase</B>:"), this);
247 gLayout->addWidget(label, 2, 0);
248 d->exactQuery = new QLineEdit(this);
249 gLayout->addWidget(d->exactQuery, 2, 1);
250
251 label = new QLabel(tr("with <B>all</B> of the words:"), this);
252 gLayout->addWidget(label, 3, 0);
253 d->allQuery = new QLineEdit(this);
254 gLayout->addWidget(d->allQuery, 3, 1);
255
256 label = new QLabel(tr("with <B>at least one</B> of the words:"), this);
257 gLayout->addWidget(label, 4, 0);
258 d->atLeastQuery = new QLineEdit(this);
259 gLayout->addWidget(d->atLeastQuery, 4, 1);
260
261 vLayout->addWidget(d->advancedSearchWidget);
262 d->advancedSearchWidget->hide();
263
264 connect(d->exactQuery, SIGNAL(returnPressed()), this, SIGNAL(search()));
265 connect(d->similarQuery, SIGNAL(returnPressed()), this, SIGNAL(search()));
266 connect(d->withoutQuery, SIGNAL(returnPressed()), this, SIGNAL(search()));
267 connect(d->allQuery, SIGNAL(returnPressed()), this, SIGNAL(search()));
268 connect(d->atLeastQuery, SIGNAL(returnPressed()), this, SIGNAL(search()));
269 connect(d->showHideAdvancedSearchButton, SIGNAL(clicked()),
270 d, SLOT(showHideAdvancedSearch()));
271#endif
272}
273
274/*!
275 Destroys the search query widget.
276*/
277QHelpSearchQueryWidget::~QHelpSearchQueryWidget()
278{
279 delete d;
280}
281
282/*!
283 Returns a list of querys to use in combination with the search engines
284 search(QList<QHelpSearchQuery> &query) function.
285*/
286QList<QHelpSearchQuery> QHelpSearchQueryWidget::query() const
287{
288#if !defined(QT_CLUCENE_SUPPORT)
289 QList<QHelpSearchQuery> queryList;
290 queryList.append(QHelpSearchQuery(QHelpSearchQuery::DEFAULT,
291 QStringList(d->defaultQuery->text())));
292
293 return queryList;
294#else
295 QList<QHelpSearchQuery> queryList;
296 if (d->defaultQuery->isEnabled()) {
297 queryList.append(QHelpSearchQuery(QHelpSearchQuery::DEFAULT,
298 d->buildTermList(d->escapeString(d->defaultQuery->text()))));
299 } else {
300 const QRegExp exp(QLatin1String("\\s+"));
301 QStringList lst = d->similarQuery->text().split(exp, QString::SkipEmptyParts);
302 if (!lst.isEmpty()) {
303 QStringList fuzzy;
304 foreach (const QString term, lst)
305 fuzzy += d->buildTermList(d->escapeString(term));
306 queryList.append(QHelpSearchQuery(QHelpSearchQuery::FUZZY, fuzzy));
307 }
308
309 lst = d->withoutQuery->text().split(exp, QString::SkipEmptyParts);
310 if (!lst.isEmpty()) {
311 QStringList without;
312 foreach (const QString term, lst)
313 without.append(d->escapeString(term));
314 queryList.append(QHelpSearchQuery(QHelpSearchQuery::WITHOUT, without));
315 }
316
317 if (!d->exactQuery->text().isEmpty()) {
318 QString phrase = d->exactQuery->text().remove(QLatin1Char('\"'));
319 phrase = d->escapeString(phrase.simplified());
320 queryList.append(QHelpSearchQuery(QHelpSearchQuery::PHRASE, QStringList(phrase)));
321 }
322
323 lst = d->allQuery->text().split(exp, QString::SkipEmptyParts);
324 if (!lst.isEmpty()) {
325 QStringList all;
326 foreach (const QString term, lst)
327 all.append(d->escapeString(term));
328 queryList.append(QHelpSearchQuery(QHelpSearchQuery::ALL, all));
329 }
330
331 lst = d->atLeastQuery->text().split(exp, QString::SkipEmptyParts);
332 if (!lst.isEmpty()) {
333 QStringList atLeast;
334 foreach (const QString term, lst)
335 atLeast += d->buildTermList(d->escapeString(term));
336 queryList.append(QHelpSearchQuery(QHelpSearchQuery::ATLEAST, atLeast));
337 }
338 }
339 return queryList;
340#endif
341}
342
343/*! \reimp
344*/
345void QHelpSearchQueryWidget::focusInEvent(QFocusEvent *focusEvent)
346{
347 if (focusEvent->reason() != Qt::MouseFocusReason) {
348 d->defaultQuery->selectAll();
349 d->defaultQuery->setFocus();
350 }
351}
352
353QT_END_NAMESPACE
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