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
|
/* This file is part of the KDE libraries
Copyright (C) 2000,2002 Carsten Pfeiffer <[email protected]>
2000 Malte Starostik <[email protected]>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include <qfile.h>
#include <qpixmap.h>
#include <qimage.h>
#include <kstandarddirs.h>
#include <kpixmapsplitter.h>
#include <kmimetype.h>
#include "textcreator.h"
extern "C"
{
KDE_EXPORT ThumbCreator *new_creator()
{
return new TextCreator;
}
}
TextCreator::TextCreator()
: m_splitter(0),
m_data(0),
m_dataSize(0)
{
}
TextCreator::~TextCreator()
{
delete m_splitter;
delete [] m_data;
}
bool TextCreator::create(const QString &path, int width, int height, QImage &img)
{
// Filter out unwanted mimetypes
KMimeType::Ptr mimeType = KMimeType::findByPath( path );
if ( mimeType->is( "text/rtf" ) )
return false;
if ( !m_splitter )
{
m_splitter = new KPixmapSplitter;
QString pixmap = locate( "data", "konqueror/pics/thumbnailfont_7x4.png" );
if ( !pixmap.isEmpty() )
{
// FIXME: make font/glyphsize configurable...
m_splitter->setPixmap( QPixmap( pixmap ));
m_splitter->setItemSize( QSize( 4, 7 ));
}
}
bool ok = false;
// determine some sizes...
// example: width: 60, height: 64
QSize pixmapSize( width, height );
if (height * 3 > width * 4)
pixmapSize.setHeight( width * 4 / 3 );
else
pixmapSize.setWidth( height * 3 / 4 );
if ( pixmapSize != m_pixmap.size() )
m_pixmap.resize( pixmapSize );
// one pixel for the rectangle, the rest. whitespace
int xborder = 1 + pixmapSize.width()/16; // minimum x-border
int yborder = 1 + pixmapSize.height()/16; // minimum y-border
QSize chSize = m_splitter->itemSize(); // the size of one char
int xOffset = chSize.width();
int yOffset = chSize.height();
// calculate a better border so that the text is centered
int canvasWidth = pixmapSize.width() - 2*xborder;
int canvasHeight = pixmapSize.height() - 2*yborder;
int numCharsPerLine = (int) (canvasWidth / chSize.width());
int numLines = (int) (canvasHeight / chSize.height());
// assumes an average line length of <= 120 chars
const int bytesToRead = 120 * numLines;
// create text-preview
QFile file( path );
if ( file.open( IO_ReadOnly ))
{
if ( !m_data || m_dataSize < bytesToRead + 1 )
{
delete [] m_data;
m_data = new char[bytesToRead+1];
m_dataSize = bytesToRead + 1;
}
int read = file.readBlock( m_data, bytesToRead );
if ( read > 0 )
{
ok = true;
m_data[read] = '\0';
QString text = QString::fromLocal8Bit( m_data );
// FIXME: maybe strip whitespace and read more?
m_pixmap.fill( QColor( 245, 245, 245 ) ); // light-grey background
QRect rect;
int rest = m_pixmap.width() - (numCharsPerLine * chSize.width());
xborder = QMAX( xborder, rest/2); // center horizontally
rest = m_pixmap.height() - (numLines * chSize.height());
yborder = QMAX( yborder, rest/2); // center vertically
// end centering
int x = xborder, y = yborder; // where to paint the characters
int posNewLine = m_pixmap.width() - (chSize.width() + xborder);
int posLastLine = m_pixmap.height() - (chSize.height() + yborder);
bool newLine = false;
Q_ASSERT( posNewLine > 0 );
const QPixmap *fontPixmap = &(m_splitter->pixmap());
for ( uint i = 0; i < text.length(); i++ )
{
if ( x > posNewLine || newLine ) // start a new line?
{
x = xborder;
y += yOffset;
if ( y > posLastLine ) // more text than space
break;
// after starting a new line, we also jump to the next
// physical newline in the file if we don't come from one
if ( !newLine )
{
int pos = text.find( '\n', i );
if ( pos == -1 )
break;
i = pos + 1;
}
newLine = false;
}
// check for newlines in the text (unix,dos)
QChar ch = text.at( i );
if ( ch == '\n' )
{
newLine = true;
continue;
}
else if ( ch == '\r' && text.at(i+1) == '\n' )
{
newLine = true;
i++; // skip the next character (\n) as well
continue;
}
rect = m_splitter->coordinates( ch );
if ( !rect.isEmpty() )
{
bitBlt( &m_pixmap, QPoint(x,y), fontPixmap, rect, Qt::CopyROP );
}
x += xOffset; // next character
}
if (ok)
img = m_pixmap.convertToImage();
}
file.close();
}
return ok;
}
ThumbCreator::Flags TextCreator::flags() const
{
return (Flags)(DrawFrame | BlendIcon);
}
|
