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
|
// This module implements the QextScintillaDocument class.
//
// Copyright (c) 2006
// Riverbank Computing Limited <info@riverbankcomputing.co.uk>
//
// This file is part of QScintilla.
//
// This copy of QScintilla 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, or (at your option) any
// later version.
//
// QScintilla is supplied 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
// QScintilla; see the file LICENSE. If not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "qextscintilladocument.h"
#include "qextscintillabase.h"
// This internal class encapsulates the underlying document and is shared by
// QextScintillaDocument instances.
class QextScintillaDocumentP
{
public:
QextScintillaDocumentP() : doc(0), nr_displays(0), nr_attaches(1) {}
long doc; // The Scintilla document.
int nr_displays; // The number of displays.
int nr_attaches; // The number of attaches.
};
// The ctor.
QextScintillaDocument::QextScintillaDocument()
{
pdoc = new QextScintillaDocumentP();
}
// The dtor.
QextScintillaDocument::~QextScintillaDocument()
{
detach();
}
// The copy ctor.
QextScintillaDocument::QextScintillaDocument(const QextScintillaDocument &that)
{
attach(that);
}
// The assignment operator.
QextScintillaDocument &QextScintillaDocument::operator=(const QextScintillaDocument &that)
{
if (pdoc != that.pdoc)
{
detach();
attach(that);
}
return *this;
}
// Attach an existing document to this one.
void QextScintillaDocument::attach(const QextScintillaDocument &that)
{
++that.pdoc -> nr_attaches;
pdoc = that.pdoc;
}
// Detach the underlying document.
void QextScintillaDocument::detach()
{
if (!pdoc)
return;
if (--pdoc -> nr_attaches == 0)
{
if (pdoc -> doc && pdoc -> nr_displays == 0)
{
QextScintillaBase *qsb = QextScintillaBase::pool();
// Release the explicit reference to the document. If
// the pool is empty then we just accept the memory
// leak.
if (qsb)
qsb -> SendScintilla(QextScintillaBase::SCI_RELEASEDOCUMENT,0,pdoc -> doc);
}
delete pdoc;
}
pdoc = 0;
}
// Undisplay and detach the underlying document.
void QextScintillaDocument::undisplay(QextScintillaBase *qsb)
{
if (--pdoc -> nr_attaches == 0)
delete pdoc;
else if (--pdoc -> nr_displays == 0)
{
// Create an explicit reference to the document to keep it
// alive.
qsb -> SendScintilla(QextScintillaBase::SCI_ADDREFDOCUMENT,0,pdoc -> doc);
}
pdoc = 0;
}
// Display the underlying document.
void QextScintillaDocument::display(QextScintillaBase *qsb,const QextScintillaDocument *from)
{
long ndoc;
if (from)
{
ndoc = from -> pdoc -> doc;
qsb -> SendScintilla(QextScintillaBase::SCI_SETDOCPOINTER,0,ndoc);
}
else
ndoc = qsb -> SendScintilla(QextScintillaBase::SCI_GETDOCPOINTER);
pdoc -> doc = ndoc;
++pdoc -> nr_displays;
}
|
