1 // This module implements the QsciLexerCustom class.
2 //
3 // Copyright (c) 2021 Riverbank Computing Limited <info@riverbankcomputing.com>
4 //
5 // This file is part of QScintilla.
6 //
7 // This file may be used under the terms of the GNU General Public License
8 // version 3.0 as published by the Free Software Foundation and appearing in
9 // the file LICENSE included in the packaging of this file. Please review the
10 // following information to ensure the GNU General Public License version 3.0
11 // requirements will be met: http://www.gnu.org/copyleft/gpl.html.
12 //
13 // If you do not wish to use this file under the terms of the GPL version 3.0
14 // then you may purchase a commercial license. For more information contact
15 // info@riverbankcomputing.com.
16 //
17 // This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
18 // WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
19
20
21 #include "Qsci/qscilexercustom.h"
22
23 #include "Qsci/qsciscintilla.h"
24 #include "Qsci/qsciscintillabase.h"
25 #include "Qsci/qscistyle.h"
26
27
28 // The ctor.
QsciLexerCustom(QObject * parent)29 QsciLexerCustom::QsciLexerCustom(QObject *parent)
30 : QsciLexer(parent)
31 {
32 }
33
34
35 // The dtor.
~QsciLexerCustom()36 QsciLexerCustom::~QsciLexerCustom()
37 {
38 }
39
40
41 // Start styling.
startStyling(int start,int)42 void QsciLexerCustom::startStyling(int start, int)
43 {
44 if (!editor())
45 return;
46
47 editor()->SendScintilla(QsciScintillaBase::SCI_STARTSTYLING, start);
48 }
49
50
51 // Set the style for a number of characters.
setStyling(int length,int style)52 void QsciLexerCustom::setStyling(int length, int style)
53 {
54 if (!editor())
55 return;
56
57 editor()->SendScintilla(QsciScintillaBase::SCI_SETSTYLING, length, style);
58 }
59
60
61 // Set the style for a number of characters.
setStyling(int length,const QsciStyle & style)62 void QsciLexerCustom::setStyling(int length, const QsciStyle &style)
63 {
64 setStyling(length, style.style());
65 }
66
67
68 // Set the attached editor.
setEditor(QsciScintilla * new_editor)69 void QsciLexerCustom::setEditor(QsciScintilla *new_editor)
70 {
71 if (editor())
72 disconnect(editor(), SIGNAL(SCN_STYLENEEDED(int)), this,
73 SLOT(handleStyleNeeded(int)));
74
75 QsciLexer::setEditor(new_editor);
76
77 if (editor())
78 connect(editor(), SIGNAL(SCN_STYLENEEDED(int)), this,
79 SLOT(handleStyleNeeded(int)));
80 }
81
82
83 // Return the number of style bits needed by the lexer.
styleBitsNeeded() const84 int QsciLexerCustom::styleBitsNeeded() const
85 {
86 return 5;
87 }
88
89
90 // Handle a request to style some text.
handleStyleNeeded(int pos)91 void QsciLexerCustom::handleStyleNeeded(int pos)
92 {
93 int start = editor()->SendScintilla(QsciScintillaBase::SCI_GETENDSTYLED);
94 int line = editor()->SendScintilla(QsciScintillaBase::SCI_LINEFROMPOSITION,
95 start);
96 start = editor()->SendScintilla(QsciScintillaBase::SCI_POSITIONFROMLINE,
97 line);
98
99 if (start != pos)
100 styleText(start, pos);
101 }
102