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authortoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
committertoma <toma@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2009-11-25 17:56:58 +0000
commit4aed2c8219774f5d797760606b8489a92ddc5163 (patch)
tree3f8c130f7d269626bf6a9447407ef6c35954426a /kioslave/thumbnail/textcreator.cpp
downloadtdebase-4aed2c8219774f5d797760606b8489a92ddc5163.tar.gz
tdebase-4aed2c8219774f5d797760606b8489a92ddc5163.zip
Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.
BUG:215923 git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdebase@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
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diff --git a/kioslave/thumbnail/textcreator.cpp b/kioslave/thumbnail/textcreator.cpp
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+/* This file is part of the KDE libraries
+ Copyright (C) 2000,2002 Carsten Pfeiffer <pfeiffer@kde.org>
+ 2000 Malte Starostik <malte@kde.org>
+
+ 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);
+}
+