1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
****************************************************************************/
#include "completingtextedit.h"
#include <QAbstractItemView>
#include <QCompleter>
#include <QKeyEvent>
#include <QScrollBar>
static bool isEndOfWordChar(const QChar &c)
{
return !c.isLetterOrNumber() && c.category() != QChar::Punctuation_Connector;
}
/*! \class Utils::CompletingTextEdit
\brief The CompletingTextEdit class is a QTextEdit with auto-completion
support.
Excerpted from Qt examples/tools/customcompleter.
*/
namespace Utils {
class CompletingTextEditPrivate
{
public:
CompletingTextEditPrivate(CompletingTextEdit *textEdit);
void insertCompletion(const QString &completion);
QString textUnderCursor() const;
bool acceptsCompletionPrefix(const QString &prefix) const;
QCompleter *m_completer;
int m_completionLengthThreshold;
private:
CompletingTextEdit *m_backPointer;
};
CompletingTextEditPrivate::CompletingTextEditPrivate(CompletingTextEdit *textEdit)
: m_completer(0),
m_completionLengthThreshold(3),
m_backPointer(textEdit)
{
}
void CompletingTextEditPrivate::insertCompletion(const QString &completion)
{
if (m_completer->widget() != m_backPointer)
return;
QTextCursor tc = m_backPointer->textCursor();
int extra = completion.length() - m_completer->completionPrefix().length();
tc.movePosition(QTextCursor::Left);
tc.movePosition(QTextCursor::EndOfWord);
tc.insertText(completion.right(extra));
m_backPointer->setTextCursor(tc);
}
QString CompletingTextEditPrivate::textUnderCursor() const
{
QTextCursor tc = m_backPointer->textCursor();
tc.select(QTextCursor::WordUnderCursor);
return tc.selectedText();
}
bool CompletingTextEditPrivate::acceptsCompletionPrefix(const QString &prefix) const
{
return prefix.length() >= m_completionLengthThreshold;
}
CompletingTextEdit::CompletingTextEdit(QWidget *parent)
: QTextEdit(parent),
d(new CompletingTextEditPrivate(this))
{
}
CompletingTextEdit::~CompletingTextEdit()
{
delete d;
}
void CompletingTextEdit::setCompleter(QCompleter *c)
{
if (completer())
disconnect(completer(), 0, this, 0);
d->m_completer = c;
if (!c)
return;
completer()->setWidget(this);
completer()->setCompletionMode(QCompleter::PopupCompletion);
connect(completer(), SIGNAL(activated(QString)), this, SLOT(insertCompletion(QString)));
}
QCompleter *CompletingTextEdit::completer() const
{
return d->m_completer;
}
int CompletingTextEdit::completionLengthThreshold() const
{
return d->m_completionLengthThreshold;
}
void CompletingTextEdit::setCompletionLengthThreshold(int len)
{
d->m_completionLengthThreshold = len;
}
void CompletingTextEdit::keyPressEvent(QKeyEvent *e)
{
if (completer() && completer()->popup()->isVisible()) {
// The following keys are forwarded by the completer to the widget
switch (e->key()) {
case Qt::Key_Enter:
case Qt::Key_Return:
case Qt::Key_Escape:
case Qt::Key_Tab:
case Qt::Key_Backtab:
e->ignore();
return; // let the completer do default behavior
default:
break;
}
}
const bool isShortcut = ((e->modifiers() & Qt::ControlModifier) && e->key() == Qt::Key_E); // CTRL+E
if (completer() == 0 || !isShortcut) // do not process the shortcut when we have a completer
QTextEdit::keyPressEvent(e);
const bool ctrlOrShift = e->modifiers() & (Qt::ControlModifier | Qt::ShiftModifier);
if (completer() == 0 || (ctrlOrShift && e->text().isEmpty()))
return;
const bool hasModifier = (e->modifiers() != Qt::NoModifier) && !ctrlOrShift;
const QString newCompletionPrefix = d->textUnderCursor();
const QChar lastChar = e->text().isEmpty() ? QChar() : e->text().right(1).at(0);
if (!isShortcut && (hasModifier || e->text().isEmpty() || isEndOfWordChar(lastChar)
|| !d->acceptsCompletionPrefix(newCompletionPrefix))) {
completer()->popup()->hide();
return;
}
if (newCompletionPrefix != completer()->completionPrefix()) {
completer()->setCompletionPrefix(newCompletionPrefix);
completer()->popup()->setCurrentIndex(completer()->completionModel()->index(0, 0));
}
QRect cr = cursorRect();
cr.setWidth(completer()->popup()->sizeHintForColumn(0)
+ completer()->popup()->verticalScrollBar()->sizeHint().width());
completer()->complete(cr); // popup it up!
}
void CompletingTextEdit::focusInEvent(QFocusEvent *e)
{
if (completer() != 0)
completer()->setWidget(this);
QTextEdit::focusInEvent(e);
}
bool CompletingTextEdit::event(QEvent *e)
{
// workaround for QTCREATORBUG-9453
if (e->type() == QEvent::ShortcutOverride && completer()
&& completer()->popup() && completer()->popup()->isVisible()) {
QKeyEvent *ke = static_cast<QKeyEvent *>(e);
if (ke->key() == Qt::Key_Escape && !ke->modifiers()) {
ke->accept();
return true;
}
}
return QTextEdit::event(e);
}
} // namespace Utils
#include "moc_completingtextedit.cpp"
|
