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Diffstat (limited to 'knode/utilities.cpp')
| -rw-r--r-- | knode/utilities.cpp | 478 |
1 files changed, 478 insertions, 0 deletions
diff --git a/knode/utilities.cpp b/knode/utilities.cpp new file mode 100644 index 000000000..5f9c2e98c --- /dev/null +++ b/knode/utilities.cpp @@ -0,0 +1,478 @@ +/* + KNode, the KDE newsreader + Copyright (c) 1999-2005 the KNode authors. + See file AUTHORS for details + + This program 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 of the License, or + (at your option) any later version. + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, US +*/ + +#include <qlayout.h> +#include <qregexp.h> +#include <qapplication.h> +#include <qcursor.h> + +#include <klocale.h> +#include <kmessagebox.h> +#include <kglobalsettings.h> +#include <kdebug.h> +#include <kio/netaccess.h> +#include <ktempfile.h> +#include <kfiledialog.h> + +#include "knwidgets.h" +#include "knglobals.h" +#include "utilities.h" + + + +//================================================================================ + +KNFile::KNFile(const QString& fname) + : QFile(fname), filePos(0), readBytes(0) +{ + buffer.resize(512); + dataPtr=buffer.data(); + dataPtr[0]='\0'; +} + + +KNFile::~KNFile() +{ +} + + +const QCString& KNFile::readLine() +{ + filePos=at(); + readBytes=QFile::readLine(dataPtr, buffer.size()-1); + if(readBytes!=-1) { + while ((dataPtr[readBytes-1]!='\n')&&(static_cast<uint>(readBytes+2)==buffer.size())) { // don't get tricked by files without newline + at(filePos); + if (!increaseBuffer() || + (readBytes=QFile::readLine(dataPtr, buffer.size()-1))==-1) { + readBytes=1; + break; + } + } + } else + readBytes=1; + + dataPtr[readBytes-1] = '\0'; + return buffer; +} + + +const QCString& KNFile::readLineWnewLine() +{ + filePos=at(); + readBytes=QFile::readLine(dataPtr, buffer.size()-1); + if(readBytes!=-1) { + while ((dataPtr[readBytes-1]!='\n')&&(static_cast<uint>(readBytes+2)==buffer.size())) { // don't get tricked by files without newline + at(filePos); + if (!increaseBuffer() || + (readBytes=QFile::readLine(dataPtr, buffer.size()-1))==-1) { + dataPtr[0] = '\0'; + break; + } + } + } + else dataPtr[0] = '\0'; + + return buffer; +} + + +int KNFile::findString(const char *s) +{ + QCString searchBuffer; + searchBuffer.resize(2048); + char *buffPtr = searchBuffer.data(), *pos; + int readBytes, currentFilePos; + + while (!atEnd()) { + currentFilePos = at(); + readBytes = readBlock(buffPtr, 2047); + if (readBytes == -1) + return -1; + else + buffPtr[readBytes] = 0; // terminate string + + pos = strstr(buffPtr,s); + if (pos == 0) { + if (!atEnd()) + at(at()-strlen(s)); + else + return -1; + } else { + return currentFilePos + (pos-buffPtr); + } + } + + return -1; +} + + +bool KNFile::increaseBuffer() +{ + if(buffer.resize(2*buffer.size())) {; + dataPtr=buffer.data(); + dataPtr[0]='\0'; + kdDebug(5003) << "KNFile::increaseBuffer() : buffer doubled" << endl; + return true; + } + else return false; +} + + +//=============================================================================== + +QString KNSaveHelper::lastPath; + +KNSaveHelper::KNSaveHelper(QString saveName, QWidget *parent) + : p_arent(parent), s_aveName(saveName), file(0), tmpFile(0) +{ +} + + +KNSaveHelper::~KNSaveHelper() +{ + if (file) { // local filesystem, just close the file + delete file; + } else + if (tmpFile) { // network location, initiate transaction + tmpFile->close(); + if (KIO::NetAccess::upload(tmpFile->name(),url, 0) == false) + KNHelper::displayRemoteFileError(); + tmpFile->unlink(); // delete temp file + delete tmpFile; + } +} + + +QFile* KNSaveHelper::getFile(const QString &dialogTitle) +{ + url = KFileDialog::getSaveURL(lastPath + s_aveName, QString::null, p_arent, dialogTitle); + + if (url.isEmpty()) + return 0; + + lastPath = url.upURL().url(); + + if (url.isLocalFile()) { + if (QFileInfo(url.path()).exists() && + (KMessageBox::warningContinueCancel(knGlobals.topWidget, + i18n("<qt>A file named <b>%1</b> already exists.<br>Do you want to replace it?</qt>").arg(url.path()), + dialogTitle, i18n("&Replace")) != KMessageBox::Continue)) { + return 0; + } + + file = new QFile(url.path()); + if(!file->open(IO_WriteOnly)) { + KNHelper::displayExternalFileError(); + delete file; + file = 0; + } + return file; + } else { + tmpFile = new KTempFile(); + if (tmpFile->status()!=0) { + KNHelper::displayTempFileError(); + delete tmpFile; + tmpFile = 0; + return 0; + } + return tmpFile->file(); + } +} + + +//=============================================================================== + +QString KNLoadHelper::l_astPath; + +KNLoadHelper::KNLoadHelper(QWidget *parent) + : p_arent(parent), f_ile(0) +{ +} + + +KNLoadHelper::~KNLoadHelper() +{ + delete f_ile; + if (!t_empName.isEmpty()) + KIO::NetAccess::removeTempFile(t_empName); +} + + +KNFile* KNLoadHelper::getFile( const QString &dialogTitle ) +{ + if (f_ile) + return f_ile; + + KURL url = KFileDialog::getOpenURL(l_astPath,QString::null,p_arent,dialogTitle); + + if (url.isEmpty()) + return 0; + + l_astPath = url.url(-1); + l_astPath.truncate(l_astPath.length()-url.fileName().length()); + + return setURL(url); +} + + +KNFile* KNLoadHelper::setURL(KURL url) +{ + if (f_ile) + return f_ile; + + u_rl = url; + + if (u_rl.isEmpty()) + return 0; + + QString fileName; + if (!u_rl.isLocalFile()) { + if (KIO::NetAccess::download(u_rl, t_empName, 0)) + fileName = t_empName; + } else + fileName = u_rl.path(); + + if (fileName.isEmpty()) + return 0; + + f_ile = new KNFile(fileName); + if(!f_ile->open(IO_ReadOnly)) { + KNHelper::displayExternalFileError(); + delete f_ile; + f_ile = 0; + } + return f_ile; +} + + +//=============================================================================== + + +// **** keyboard selection dialog ********************************************* +int KNHelper::selectDialog(QWidget *parent, const QString &caption, const QStringList &options, int initialValue) +{ + KDialogBase *dlg=new KDialogBase(KDialogBase::Plain, caption, KDialogBase::Ok|KDialogBase::Cancel, + KDialogBase::Ok, parent); + QFrame *page = dlg->plainPage(); + QHBoxLayout *pageL = new QHBoxLayout(page,8,5); + + KNDialogListBox *list = new KNDialogListBox(true, page); + pageL->addWidget(list); + + QString s; + for ( QStringList::ConstIterator it = options.begin(); it != options.end(); ++it ) { + s = (*it); + s.replace(QRegExp("&"),""); // remove accelerators + list->insertItem(s); + } + + list->setCurrentItem(initialValue); + list->setFocus(); + restoreWindowSize("selectBox", dlg, QSize(247,174)); + + int ret; + if (dlg->exec()) + ret = list->currentItem(); + else + ret = -1; + + saveWindowSize("selectBox", dlg->size()); + delete dlg; + return ret; +} + +// **** window geometry managing ********************************************* + +void KNHelper::saveWindowSize(const QString &name, const QSize &s) +{ + KConfig *c=knGlobals.config(); + c->setGroup("WINDOW_SIZES"); + c->writeEntry(name, s); +} + + +void KNHelper::restoreWindowSize(const QString &name, QWidget *d, const QSize &defaultSize) +{ + KConfig *c=knGlobals.config(); + c->setGroup("WINDOW_SIZES"); + + QSize s=c->readSizeEntry(name,&defaultSize); + + if(s.isValid()) { + QRect max = KGlobalSettings::desktopGeometry(QCursor::pos()); + if ( s.width() > max.width() ) s.setWidth( max.width()-5 ); + if ( s.height() > max.height() ) s.setHeight( max.height()-5 ); + d->resize(s); + } +} + +// **** scramble password strings ********************************************** + +const QString KNHelper::encryptStr(const QString& aStr) +{ + uint i,val,len = aStr.length(); + QCString result; + + for (i=0; i<len; i++) + { + val = aStr[i] - ' '; + val = (255-' ') - val; + result += (char)(val + ' '); + } + + return result; +} + + +const QString KNHelper::decryptStr(const QString& aStr) +{ + return encryptStr(aStr); +} + +// **** rot13 ******************************************************************* + +QString KNHelper::rot13(const QString &s) +{ + QString r(s); + + for (int i=0; (uint)i<r.length(); i++) { + if ( r[i] >= QChar('A') && r[i] <= QChar('M') || + r[i] >= QChar('a') && r[i] <= QChar('m') ) + r[i] = (char)((int)QChar(r[i]) + 13); + else + if ( r[i] >= QChar('N') && r[i] <= QChar('Z') || + r[i] >= QChar('n') && r[i] <= QChar('z') ) + r[i] = (char)((int)QChar(r[i]) - 13); + } + + return r; +} + +// **** text rewraping ********************************************************* + +int findBreakPos(const QString &text, int start) +{ + int i; + for(i=start;i>=0;i--) + if(text[i].isSpace()) + break; + if(i>0) + return i; + for(i=start;i<(int)text.length();i++) // ok, the line is to long + if(text[i].isSpace()) + break; + return i; +} + + +void appendTextWPrefix(QString &result, const QString &text, int wrapAt, const QString &prefix) +{ + QString txt=text; + int breakPos; + + while(!txt.isEmpty()) { + + if((int)(prefix.length()+txt.length()) > wrapAt) { + breakPos=findBreakPos(txt,wrapAt-prefix.length()); + result+=(prefix+txt.left(breakPos)+"\n"); + txt.remove(0,breakPos+1); + } else { + result+=(prefix+txt+"\n"); + txt=QString::null; + } + } +} + + +QString KNHelper::rewrapStringList(QStringList text, int wrapAt, QChar quoteChar, bool stopAtSig, bool alwaysSpace) +{ + QString quoted, lastPrefix, thisPrefix, leftover, thisLine; + int breakPos; + + for(QStringList::Iterator line=text.begin(); line!=text.end(); ++line) { + + if(stopAtSig && (*line)=="-- ") + break; + + thisLine=(*line); + if (!alwaysSpace && (thisLine[0]==quoteChar)) + thisLine.prepend(quoteChar); // second quote level without space + else + thisLine.prepend(quoteChar+' '); + + thisPrefix=QString::null; + QChar c; + for(int idx=0; idx<(int)(thisLine.length()); idx++) { + c=thisLine.at(idx); + if( (c==' ') || + (c==quoteChar) || (c=='>') ||(c=='|') || (c==':') || (c=='#') || (c=='[') || (c=='{')) + thisPrefix.append(c); + else + break; + } + + thisLine.remove(0,thisPrefix.length()); + thisLine = thisLine.stripWhiteSpace(); + + if(!leftover.isEmpty()) { // don't break paragraphs, tables and quote levels + if(thisLine.isEmpty() || (thisPrefix!=lastPrefix) || thisLine.contains(" ") || thisLine.contains('\t')) + appendTextWPrefix(quoted, leftover, wrapAt, lastPrefix); + else + thisLine.prepend(leftover+" "); + leftover=QString::null; + } + + if((int)(thisPrefix.length()+thisLine.length()) > wrapAt) { + breakPos=findBreakPos(thisLine,wrapAt-thisPrefix.length()); + if(breakPos < (int)(thisLine.length())) { + leftover=thisLine.right(thisLine.length()-breakPos-1); + thisLine.truncate(breakPos); + } + } + + quoted+=thisPrefix+thisLine+"\n"; + lastPrefix=thisPrefix; + } + + if (!leftover.isEmpty()) + appendTextWPrefix(quoted, leftover, wrapAt, lastPrefix); + + return quoted; +} + +// **** misc. message-boxes ********************************************************** + +void KNHelper::displayInternalFileError(QWidget *w) +{ + KMessageBox::error((w!=0)? w : knGlobals.topWidget, i18n("Unable to load/save configuration.\nWrong permissions on home folder?\nYou should close KNode now to avoid data loss.")); +} + + +void KNHelper::displayExternalFileError(QWidget *w) +{ + KMessageBox::error((w!=0)? w : knGlobals.topWidget, i18n("Unable to load/save file.")); +} + + +void KNHelper::displayRemoteFileError(QWidget *w) +{ + KMessageBox::error((w!=0)? w : knGlobals.topWidget, i18n("Unable to save remote file.")); +} + + +void KNHelper::displayTempFileError(QWidget *w) +{ + KMessageBox::error((w!=0)? w : knGlobals.topWidget, i18n("Unable to create temporary file.")); +} |