diff options
Diffstat (limited to 'knewsticker/common/newsengine.cpp')
| -rw-r--r-- | knewsticker/common/newsengine.cpp | 324 |
1 files changed, 324 insertions, 0 deletions
diff --git a/knewsticker/common/newsengine.cpp b/knewsticker/common/newsengine.cpp new file mode 100644 index 00000000..cce7895c --- /dev/null +++ b/knewsticker/common/newsengine.cpp @@ -0,0 +1,324 @@ +/* + * newsengine.cpp + * + * Copyright (c) 2000, 2001 Frerich Raabe <raabe@kde.org> + * + * This program 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. For licensing and distribution details, check the + * accompanying file 'COPYING'. + */ +#include "newsengine.h" +#include "configiface.h" +#include "configaccess.h" +#include "xmlnewsaccess.h" +#include "newsiconmgr.h" + +#include <kapplication.h> +#include <kdebug.h> +#include <kmessagebox.h> +#include <kprocess.h> +#include <krun.h> +#include <kstandarddirs.h> + +#include <qbuffer.h> + +Article::Article(NewsSourceBase *parent, const QString &headline, + const KURL &address) + : XMLNewsArticle(headline, address), + m_parent(parent), + m_read(false) +{ +} + +bool Article::operator==(const Article &other) const +{ + return headline() == other.headline() && address() == other.address(); +} + +void Article::open() +{ + (void) new KRun(address()); + m_read = true; +} + +NewsSourceBase::NewsSourceBase(const Data &nsd, ConfigIface *config) + : XMLNewsSource(), + m_data(nsd), + m_icon(QPixmap()), + m_cfg(dynamic_cast<ConfigAccess *>(config)), + m_newsIconMgr(NewsIconMgr::self()) +{ + connect(this, SIGNAL(loadComplete(XMLNewsSource *, bool)), + SLOT(slotProcessArticles(XMLNewsSource *, bool))); +} + +void NewsSourceBase::getIcon() +{ + connect(m_newsIconMgr, SIGNAL(gotIcon(const KURL &, const QPixmap &)), + this, SLOT(slotGotIcon(const KURL &, const QPixmap &))); + m_newsIconMgr->getIcon( KURL( m_data.icon ) ); +} + +QString NewsSourceBase::newsSourceName() const +{ + if (m_cfg->customNames() || m_name.isEmpty()) + return m_data.name; + else + return m_name; +} + +QString NewsSourceBase::subjectText(const Subject subject) +{ + switch (subject) { + case Arts: return i18n("Arts"); + case Business: return i18n("Business"); + case Computers: return i18n("Computers"); + case Games: return i18n("Games"); + case Health: return i18n("Health"); + case Home: return i18n("Home"); + case Recreation: return i18n("Recreation"); + case Reference: return i18n("Reference"); + case Science: return i18n("Science"); + case Shopping: return i18n("Shopping"); + case Society: return i18n("Society"); + case Sports: return i18n("Sports"); + case Misc: return i18n("Miscellaneous"); + case Magazines: return i18n("Magazines"); + default: return i18n("Unknown"); + } +} + +void NewsSourceBase::slotProcessArticles(XMLNewsSource *, bool gotEm) +{ + if (!gotEm) { + emit invalidInput(this); + return; + } + + Article::List oldArticles = m_articles; + + // Truncate the list of articles if necessary. + m_articles.clear(); + XMLNewsArticle::List::ConstIterator it = XMLNewsSource::articles().begin(); + XMLNewsArticle::List::ConstIterator end = XMLNewsSource::articles().end(); + for (; it != end; ++it) + m_articles.append(new Article(this, (*it).headline(), (*it).address())); + + // Fill the list with old articles until maxArticles is reached. + if (m_articles.count() < m_data.maxArticles) { + Article::List::ConstIterator oldArtIt = oldArticles.begin(); + Article::List::ConstIterator oldArtEnd = oldArticles.end(); + bool isNewArticle; + for (; oldArtIt != oldArtEnd; ++oldArtIt) { + isNewArticle = true; + Article::List::ConstIterator newArtIt = m_articles.begin(); + Article::List::ConstIterator newArtEnd = m_articles.end(); + for (; newArtIt != newArtEnd; ++newArtIt) { + Article newArt = **newArtIt; + Article oldArt = **oldArtIt; + if (newArt == oldArt) + isNewArticle = false; + } + + if (isNewArticle) + m_articles.append(*oldArtIt); + if (m_articles.count() == m_data.maxArticles) + break; + } + } else + while (m_articles.count() > m_data.maxArticles) + m_articles.remove(m_articles.fromLast()); + + // Copy the read flag of known articles + Article::List::ConstIterator oldArtIt = oldArticles.begin(); + Article::List::ConstIterator oldArtEnd = oldArticles.end(); + for (; oldArtIt != oldArtEnd; ++oldArtIt) { + Article::List::Iterator newArtIt = m_articles.begin(); + Article::List::Iterator newArtEnd = m_articles.end(); + for (; newArtIt != newArtEnd; ++newArtIt) + if (**oldArtIt == **newArtIt) + (*newArtIt)->setRead((*oldArtIt)->read()); + } + + emit newNewsAvailable(this, oldArticles != m_articles); +} + +Article::Ptr NewsSourceBase::article(const QString &headline) +{ + Article::List::ConstIterator it = m_articles.begin(); + Article::List::ConstIterator end = m_articles.end(); + for (; it != end; ++it) + if ((*it)->headline() == headline) + return *it; + + return 0L; +} + +void NewsSourceBase::slotGotIcon(const KURL &url, const QPixmap &pixmap) +{ + if (url.url() == m_data.icon) { + m_icon = pixmap; + + disconnect(m_newsIconMgr, SIGNAL(gotIcon(const KURL &, const QPixmap &)), + this, SLOT(slotGotIcon(const KURL &, const QPixmap &))); + } +} + +SourceFileNewsSource::SourceFileNewsSource(const NewsSourceBase::Data &nsd, + ConfigIface *config) + : NewsSourceBase(nsd, config) +{ +} + +void SourceFileNewsSource::retrieveNews() +{ + loadFrom(KURL( m_data.sourceFile )); +} + +ProgramNewsSource::ProgramNewsSource(const NewsSourceBase::Data &nsd, + ConfigIface *config) : NewsSourceBase(nsd, config), + m_program(new KProcess()), + m_programOutput(0) +{ + connect(m_program, SIGNAL(processExited(KProcess *)), + SLOT(slotProgramExited(KProcess *))); + connect(m_program, SIGNAL(receivedStdout(KProcess *, char *, int)), + SLOT(slotGotProgramOutput(KProcess *, char *, int))); + + m_data.sourceFile = KURL(m_data.sourceFile).encodedPathAndQuery(); +} + +ProgramNewsSource::~ProgramNewsSource() +{ + delete m_program; + delete m_programOutput; +} + +void ProgramNewsSource::retrieveNews() +{ + m_programOutput = new QBuffer; + m_programOutput->open(IO_WriteOnly); + + *m_program << m_data.sourceFile; + m_program->start(KProcess::NotifyOnExit, KProcess::Stdout); +} + +void ProgramNewsSource::slotGotProgramOutput(KProcess *, char *data, int length) +{ + m_programOutput->writeBlock(data, length); +} + +void ProgramNewsSource::slotProgramExited(KProcess *proc) +{ + bool okSoFar = true; + + QString errorMsg; + + if (!proc->normalExit()) { + errorMsg = i18n("<p>The program '%1' was terminated abnormally.<br>This can" + " happen if it receives the SIGKILL signal.</p>"); + okSoFar = false; + } else { + ErrorCode error = static_cast<ErrorCode>(proc->exitStatus()); + if (error != NOERR) { + errorMsg = errorMessage(error).arg(m_data.sourceFile); + okSoFar = false; + } + } + + if (!okSoFar) { + QString output = QString(m_programOutput->buffer()); + if (!output.isEmpty()) { + output = QString::fromLatin1("\"") + output + QString::fromLatin1("\""); + errorMsg += i18n("<p>Program output:<br>%1<br>").arg(output); + } + KMessageBox::detailedError(0, i18n("An error occurred while updating the" + " news source '%1'.").arg(newsSourceName()), errorMsg, + i18n("KNewsTicker Error")); + } + + processData(m_programOutput->buffer(), okSoFar); + + delete m_programOutput; + m_programOutput = 0; +} + +QString ProgramNewsSource::errorMessage(const ErrorCode errorCode) +{ + switch (errorCode) { + case EPERM: return i18n("The program '%1' could not be started at all."); + case ENOENT: return i18n("The program '%1' tried to read or write a file or" + " directory which could not be found."); + case EIO: return i18n("An error occurred while the program '%1' tried to" + " read or write data."); + case E2BIG: return i18n("The program '%1' was passed too many arguments." + " Please adjust the command line in the configuration dialog."); + case ENOEXEC: return i18n("An external system program upon which the" + " program '%1' relied could not be executed."); + case EACCESS: return i18n("The program '%1' tried to read or write a file or" + " directory but lacks the permission to do so."); + case ENODEV: return i18n("The program '%1' tried to access a device which" + " was not available."); + case ENOSPC: return i18n("There is no more space left on the device used by" + " the program '%1'."); + case EROFS: return i18n("The program '%1' tried to create a temporary file" + " on a read only file system."); + case ENOSYS: return i18n("The program '%1' tried to call a function which" + " is not implemented or attempted to access an external resource which" + " does not exist."); + case ENODATA: return i18n("The program '%1' was unable to retrieve input data and" + " was therefore unable to return any XML data."); + case ENONET: return i18n("The program '%1' tried to access a host which is not" + " connected to a network."); + case EPROTO: return i18n("The program '%1' tried to access a protocol which is not" + " implemented."); + case EDESTADDRREQ: return i18n("The program '%1' requires you to configure a" + " destination address to retrieve data from. Please refer to the" + " documentation of the program for information on how to do that."); + case ESOCKTNOSUPPORT: return i18n("The program '%1' tried to use a socket" + " type which is not supported by this system."); + case ENETUNREACH: return i18n("The program '%1' tried to access an unreachable" + " network."); + case ENETRESET: return i18n("The network the program '%1' was trying to access" + " dropped the connection with a reset."); + case ECONNRESET: return i18n("The connection of the program '%1' was reset by" + " peer."); + case ETIMEDOUT: return i18n("The connection the program '%1' was trying to" + " establish timed out."); + case ECONNREFUSED: return i18n("The connection the program '%1' was trying to" + " establish was refused."); + case EHOSTDOWN: return i18n("The host the program '%1' was trying to reach is" + " down."); + case EHOSTUNREACH: return i18n("The host the program '%1' was trying to reach is" + " unreachable, no route to host."); + case ENOEXECBIT: return i18n("KNewsTicker could not execute the program '%1'" + " because its executable bit was not set. You can mark that program as" + " executable by executing the following steps:<ul>" + "<li>Open a Konqueror window and browse to the program</li>" + "<li>Click on the file with the right mouse button, and select 'Properties'</li>" + "<li>Open the 'Permissions' tab and make sure that the box in the column" + " 'Exec' and the row 'User' is checked to ensure that the current user" + " is allowed to execute that file.</li></ul>"); + case EBADREQ: return i18n("The program '%1' sent a bad request which was not" + " understood by the server."); + case ENOAUTH: return i18n("The program '%1' failed to issue an authorization for" + " an area which needs some form of authorization before it can be" + " accessed."); + case EMUSTPAY: return i18n("The program '%1' aborted because it could not access" + " the data without paying for it."); + case EFORBIDDEN: return i18n("The program '%1' tried to access a forbidden" + " source."); + case ENOTFOUND: return i18n("The program '%1' tried to access data which" + " could not be found."); + case ETIMEOUT: return i18n("The HTTP request of the program '%1' timed out."); + case ESERVERE: return i18n("A server error has been encountered. It is likely" + " that you cannot do anything about it."); + case EHTTPNOSUP: return i18n("The HTTP protocol version used by the program" + " '%1' was not understood by the HTTP server or source."); + default: return i18n("KNewsTicker was unable to detect the exact reasons for" + " the error."); + } +} + +#include "newsengine.moc" |