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
|
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** 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.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#include "ExpressionUnderCursor.h"
#include "SimpleLexer.h"
#include "BackwardsScanner.h"
#include <Token.h>
#include <QTextCursor>
#include <QTextBlock>
using namespace CPlusPlus;
ExpressionUnderCursor::ExpressionUnderCursor()
: _jumpedComma(false)
{ }
ExpressionUnderCursor::~ExpressionUnderCursor()
{ }
int ExpressionUnderCursor::startOfExpression(BackwardsScanner &tk, int index)
{
index = startOfExpression_helper(tk, index);
if (_jumpedComma) {
const SimpleToken &tok = tk[index - 1];
switch (tok.kind()) {
case T_COMMA:
case T_LPAREN:
case T_LBRACKET:
case T_LBRACE:
case T_SEMICOLON:
case T_COLON:
case T_QUESTION:
break;
default:
if (tok.isOperator())
return startOfExpression(tk, index - 1);
break;
}
}
return index;
}
int ExpressionUnderCursor::startOfExpression_helper(BackwardsScanner &tk, int index)
{
if (tk[index - 1].isLiteral()) {
return index - 1;
} else if (tk[index - 1].is(T_THIS)) {
return index - 1;
} else if (tk[index - 1].is(T_TYPEID)) {
return index - 1;
} else if (tk[index - 1].is(T_SIGNAL)) {
if (tk[index - 2].is(T_COMMA) && !_jumpedComma) {
_jumpedComma = true;
return startOfExpression(tk, index - 2);
}
return index - 1;
} else if (tk[index - 1].is(T_SLOT)) {
if (tk[index - 2].is(T_COMMA) && !_jumpedComma) {
_jumpedComma = true;
return startOfExpression(tk, index - 2);
}
return index - 1;
} else if (tk[index - 1].is(T_IDENTIFIER)) {
if (tk[index - 2].is(T_TILDE)) {
if (tk[index - 3].is(T_COLON_COLON)) {
return startOfExpression(tk, index - 3);
} else if (tk[index - 3].is(T_DOT) || tk[index - 3].is(T_ARROW)) {
return startOfExpression(tk, index - 3);
}
return index - 2;
} else if (tk[index - 2].is(T_COLON_COLON)) {
return startOfExpression(tk, index - 1);
} else if (tk[index - 2].is(T_DOT) || tk[index - 2].is(T_ARROW)) {
return startOfExpression(tk, index - 2);
} else if (tk[index - 2].is(T_DOT_STAR) || tk[index - 2].is(T_ARROW_STAR)) {
return startOfExpression(tk, index - 2);
}
return index - 1;
} else if (tk[index - 1].is(T_RPAREN)) {
int rparenIndex = tk.startOfMatchingBrace(index);
if (rparenIndex != index) {
if (tk[rparenIndex - 1].is(T_GREATER)) {
int lessIndex = tk.startOfMatchingBrace(rparenIndex);
if (lessIndex != rparenIndex - 1) {
if (tk[lessIndex - 1].is(T_DYNAMIC_CAST) ||
tk[lessIndex - 1].is(T_STATIC_CAST) ||
tk[lessIndex - 1].is(T_CONST_CAST) ||
tk[lessIndex - 1].is(T_REINTERPRET_CAST))
return lessIndex - 1;
else if (tk[lessIndex - 1].is(T_IDENTIFIER))
return startOfExpression(tk, lessIndex);
else if (tk[lessIndex - 1].is(T_SIGNAL))
return startOfExpression(tk, lessIndex);
else if (tk[lessIndex - 1].is(T_SLOT))
return startOfExpression(tk, lessIndex);
}
}
return startOfExpression(tk, rparenIndex);
}
return index;
} else if (tk[index - 1].is(T_RBRACKET)) {
int rbracketIndex = tk.startOfMatchingBrace(index);
if (rbracketIndex != index)
return startOfExpression(tk, rbracketIndex);
return index;
} else if (tk[index - 1].is(T_COLON_COLON)) {
if (tk[index - 2].is(T_GREATER)) { // ### not exactly
int lessIndex = tk.startOfMatchingBrace(index - 1);
if (lessIndex != index - 1)
return startOfExpression(tk, lessIndex);
return index - 1;
} else if (tk[index - 2].is(T_IDENTIFIER)) {
return startOfExpression(tk, index - 1);
}
return index - 1;
} else if (tk[index - 1].is(T_DOT) || tk[index - 1].is(T_ARROW)) {
return startOfExpression(tk, index - 1);
} else if (tk[index - 1].is(T_DOT_STAR) || tk[index - 1].is(T_ARROW_STAR)) {
return startOfExpression(tk, index - 1);
}
return index;
}
bool ExpressionUnderCursor::isAccessToken(const SimpleToken &tk)
{
switch (tk.kind()) {
case T_COLON_COLON:
case T_DOT: case T_ARROW:
case T_DOT_STAR: case T_ARROW_STAR:
return true;
default:
return false;
} // switch
}
QString ExpressionUnderCursor::operator()(const QTextCursor &cursor)
{
BackwardsScanner scanner(cursor);
_jumpedComma = false;
const int initialSize = scanner.startToken();
const int i = startOfExpression(scanner, initialSize);
if (i == initialSize)
return QString();
return scanner.mid(i);
}
int ExpressionUnderCursor::startOfFunctionCall(const QTextCursor &cursor) const
{
BackwardsScanner scanner(cursor);
int index = scanner.startToken();
forever {
const SimpleToken &tk = scanner[index - 1];
if (tk.is(T_EOF_SYMBOL))
break;
else if (tk.is(T_LPAREN))
return scanner.startPosition() + tk.position();
else if (tk.is(T_RPAREN)) {
int matchingBrace = scanner.startOfMatchingBrace(index);
if (matchingBrace == index) // If no matching brace found
return -1;
index = matchingBrace;
} else
--index;
}
return -1;
}
|
