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libqtxdg-packaging/qtxdg/xdgmenu.cpp

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/* BEGIN_COMMON_COPYRIGHT_HEADER
* (c)LGPL2+
*
* Razor - a lightweight, Qt based, desktop toolset
* http://razor-qt.org
*
* Copyright: 2010-2011 Razor team
* Authors:
* Alexander Sokoloff <sokoloff.a@gmail.com>
*
* This program or library is free software; you can redistribute it
* and/or modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 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
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General
* Public License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*
* END_COMMON_COPYRIGHT_HEADER */
#include "xdgmenu.h"
#include "xdgmenu_p.h"
#include "xdgmenureader.h"
#include "xmlhelper.h"
#include "xdgmenurules.h"
#include "xdgmenuapplinkprocessor.h"
#include "xdgdirs.h"
#include "xdgmenulayoutprocessor.h"
#include <QDebug>
#include <QtXml/QDomElement>
#include <QtXml/QDomNamedNodeMap>
#include <QFile>
#include <QFileInfo>
#include <QFileSystemWatcher>
#include <QSettings>
#include <QDir>
#include <QHash>
#include <QLocale>
#include <QTranslator>
#include <QCoreApplication>
#include <QCryptographicHash>
// Helper functions prototypes
void installTranslation(const QString &name);
bool isParent(const QDomElement& parent, const QDomElement& child);
XdgMenu::XdgMenu(QObject *parent) :
QObject(parent),
d_ptr(new XdgMenuPrivate(this))
{
}
XdgMenu::~XdgMenu()
{
Q_D(XdgMenu);
delete d;
}
XdgMenuPrivate::XdgMenuPrivate(XdgMenu *parent):
mOutDated(true),
q_ptr(parent)
{
mRebuildDelayTimer.setSingleShot(true);
mRebuildDelayTimer.setInterval(REBUILD_DELAY);
connect(&mRebuildDelayTimer, SIGNAL(timeout()), this, SLOT(rebuild()));
connect(&mWatcher, SIGNAL(fileChanged(QString)), &mRebuildDelayTimer, SLOT(start()));
connect(&mWatcher, SIGNAL(directoryChanged(QString)), &mRebuildDelayTimer, SLOT(start()));
connect(this, SIGNAL(changed()), q_ptr, SIGNAL(changed()));
}
const QString XdgMenu::logDir() const
{
Q_D(const XdgMenu);
return d->mLogDir;
}
void XdgMenu::setLogDir(const QString& directory)
{
Q_D(XdgMenu);
d->mLogDir = directory;
}
const QDomDocument XdgMenu::xml() const
{
Q_D(const XdgMenu);
return d->mXml;
}
QString XdgMenu::menuFileName() const
{
Q_D(const XdgMenu);
return d->mMenuFileName;
}
QStringList XdgMenu::environments()
{
Q_D(XdgMenu);
return d->mEnvironments;
}
void XdgMenu::setEnvironments(const QStringList &envs)
{
Q_D(XdgMenu);
d->mEnvironments = envs;
}
void XdgMenu::setEnvironments(const QString &env)
{
setEnvironments(QStringList() << env);
}
const QString XdgMenu::errorString() const
{
Q_D(const XdgMenu);
return d->mErrorString;
}
bool XdgMenu::read(const QString& menuFileName)
{
Q_D(XdgMenu);
d->mMenuFileName = menuFileName;
d->clearWatcher();
XdgMenuReader reader(this);
if (!reader.load(d->mMenuFileName))
{
qWarning() << reader.errorString();
d->mErrorString = reader.errorString();
return false;
}
d->mXml = reader.xml();
QDomElement root = d->mXml.documentElement();
d->saveLog(QLatin1String("00-reader.xml"));
d->simplify(root);
d->saveLog(QLatin1String("01-simplify.xml"));
d->mergeMenus(root);
d->saveLog(QLatin1String("02-mergeMenus.xml"));
d->moveMenus(root);
d->saveLog(QLatin1String("03-moveMenus.xml"));
d->mergeMenus(root);
d->saveLog(QLatin1String("04-mergeMenus.xml"));
d->deleteDeletedMenus(root);
d->saveLog(QLatin1String("05-deleteDeletedMenus.xml"));
d->processDirectoryEntries(root, QStringList());
d->saveLog(QLatin1String("06-processDirectoryEntries.xml"));
d->processApps(root);
d->saveLog(QLatin1String("07-processApps.xml"));
d->processLayouts(root);
d->saveLog(QLatin1String("08-processLayouts.xml"));
d->deleteEmpty(root);
d->saveLog(QLatin1String("09-deleteEmpty.xml"));
d->fixSeparators(root);
d->saveLog(QLatin1String("10-fixSeparators.xml"));
d->mOutDated = false;
d->mHash = QCryptographicHash::hash(d->mXml.toByteArray(), QCryptographicHash::Md5);
return true;
}
void XdgMenu::save(const QString& fileName)
{
Q_D(const XdgMenu);
QFile file(fileName);
if (!file.open(QFile::WriteOnly | QFile::Text))
{
qWarning() << QString::fromLatin1("Cannot write file %1:\n%2.")
.arg(fileName, file.errorString());
return;
}
QTextStream ts(&file);
d->mXml.save(ts, 2);
file.close();
}
/************************************************
For debug only
************************************************/
void XdgMenuPrivate::load(const QString& fileName)
{
QFile file(fileName);
if (!file.open(QFile::ReadOnly | QFile::Text))
{
qWarning() << QString::fromLatin1("%1 not loading: %2").arg(fileName, file.errorString());
return;
}
mXml.setContent(&file, true);
}
void XdgMenuPrivate::saveLog(const QString& logFileName)
{
Q_Q(XdgMenu);
if (!mLogDir.isEmpty())
q->save(mLogDir + QLatin1Char('/') + logFileName);
}
void XdgMenuPrivate::mergeMenus(QDomElement& element)
{
QHash<QString, QDomElement> menus;
MutableDomElementIterator it(element, QLatin1String("Menu"));
it.toFront();
while(it.hasNext())
{
it.next();
menus[it.current().attribute(QLatin1String("name"))] = it.current();
}
it.toBack();
while (it.hasPrevious())
{
QDomElement src = it.previous();
QDomElement dest = menus[src.attribute(QLatin1String("name"))];
if (dest != src)
{
prependChilds(src, dest);
element.removeChild(src);
}
}
QDomElement n = element.firstChildElement(QLatin1String("Menu"));
while (!n.isNull())
{
mergeMenus(n);
n = n.nextSiblingElement(QLatin1String("Menu"));
}
it.toFront();
while(it.hasNext())
mergeMenus(it.next());
}
void XdgMenuPrivate::simplify(QDomElement& element)
{
MutableDomElementIterator it(element);
//it.toFront();
while(it.hasNext())
{
QDomElement n = it.next();
if (n.tagName() == QLatin1String("Name"))
{
// The <Name> field must not contain the slash character ("/");
// implementations should discard any name containing a slash.
element.setAttribute(QLatin1String("name"), n.text().remove(QLatin1Char('/')));
n.parentNode().removeChild(n);
}
// ......................................
else if(n.tagName() == QLatin1String("Deleted"))
{
element.setAttribute(QLatin1String("deleted"), true);
n.parentNode().removeChild(n);
}
else if(n.tagName() == QLatin1String("NotDeleted"))
{
element.setAttribute(QLatin1String("deleted"), false);
n.parentNode().removeChild(n);
}
// ......................................
else if(n.tagName() == QLatin1String("OnlyUnallocated"))
{
element.setAttribute(QLatin1String("onlyUnallocated"), true);
n.parentNode().removeChild(n);
}
else if(n.tagName() == QLatin1String(QLatin1String("NotOnlyUnallocated")))
{
element.setAttribute(QLatin1String("onlyUnallocated"), false);
n.parentNode().removeChild(n);
}
// ......................................
else if(n.tagName() == QLatin1String("FileInfo"))
{
n.parentNode().removeChild(n);
}
// ......................................
else if(n.tagName() == QLatin1String("Menu"))
{
simplify(n);
}
}
}
void XdgMenuPrivate::prependChilds(QDomElement& srcElement, QDomElement& destElement)
{
MutableDomElementIterator it(srcElement);
it.toBack();
while(it.hasPrevious())
{
QDomElement n = it.previous();
destElement.insertBefore(n, destElement.firstChild());
}
if (srcElement.attributes().contains(QLatin1String("deleted")) &&
!destElement.attributes().contains(QLatin1String("deleted"))
)
destElement.setAttribute(QLatin1String("deleted"), srcElement.attribute(QLatin1String("deleted")));
if (srcElement.attributes().contains(QLatin1String("onlyUnallocated")) &&
!destElement.attributes().contains(QLatin1String("onlyUnallocated"))
)
destElement.setAttribute(QLatin1String("onlyUnallocated"), srcElement.attribute(QLatin1String("onlyUnallocated")));
}
void XdgMenuPrivate::appendChilds(QDomElement& srcElement, QDomElement& destElement)
{
MutableDomElementIterator it(srcElement);
while(it.hasNext())
destElement.appendChild(it.next());
if (srcElement.attributes().contains(QLatin1String("deleted")))
destElement.setAttribute(QLatin1String("deleted"), srcElement.attribute(QLatin1String("deleted")));
if (srcElement.attributes().contains(QLatin1String("onlyUnallocated")))
destElement.setAttribute(QLatin1String("onlyUnallocated"), srcElement.attribute(QLatin1String("onlyUnallocated")));
}
/************************************************
Search item by path. The path can be absolute or relative. If the element not
found, the behavior depends on a parameter "createNonExisting." If it's true, then
the missing items will be created, otherwise the function returns 0.
************************************************/
QDomElement XdgMenu::findMenu(QDomElement& baseElement, const QString& path, bool createNonExisting)
{
Q_D(XdgMenu);
// Absolute path ..................
if (path.startsWith(QLatin1Char('/')))
{
QDomElement root = d->mXml.documentElement();
return findMenu(root, path.section(QLatin1Char('/'), 2), createNonExisting);
}
// Relative path ..................
if (path.isEmpty())
return baseElement;
QString name = path.section(QLatin1Char('/'), 0, 0);
MutableDomElementIterator it(baseElement);
while(it.hasNext())
{
QDomElement n = it.next();
if (n.attribute(QLatin1String("name")) == name)
return findMenu(n, path.section(QLatin1Char('/'), 1), createNonExisting);
}
// Not found ......................
if (!createNonExisting)
return QDomElement();
const QStringList names = path.split(QLatin1Char('/'), QString::SkipEmptyParts);
QDomElement el = baseElement;
Q_FOREACH (const QString &name, names)
{
QDomElement p = el;
el = d->mXml.createElement(QLatin1String("Menu"));
p.appendChild(el);
el.setAttribute(QLatin1String("name"), name);
}
return el;
}
bool isParent(const QDomElement& parent, const QDomElement& child)
{
QDomNode n = child;
while (!n.isNull())
{
if (n == parent)
return true;
n = n.parentNode();
}
return false;
}
/************************************************
Recurse to resolve <Move> elements for each menu starting with any child menu before
handling the more top level menus. So the deepest menus have their <Move> operations
performed first. Within each <Menu>, execute <Move> operations in the order that
they appear.
If the destination path does not exist, simply relocate the origin <Menu> element,
and change its <Name> field to match the destination path.
If the origin path does not exist, do nothing.
If both paths exist, take the origin <Menu> element, delete its <Name> element, and
prepend its remaining child elements to the destination <Menu> element.
************************************************/
void XdgMenuPrivate::moveMenus(QDomElement& element)
{
Q_Q(XdgMenu);
{
MutableDomElementIterator i(element, QLatin1String("Menu"));
while(i.hasNext())
moveMenus(i.next());
}
MutableDomElementIterator i(element, QLatin1String("Move"));
while(i.hasNext())
{
i.next();
QString oldPath = i.current().lastChildElement(QLatin1String("Old")).text();
QString newPath = i.current().lastChildElement(QLatin1String("New")).text();
element.removeChild(i.current());
if (oldPath.isEmpty() || newPath.isEmpty())
continue;
QDomElement oldMenu = q->findMenu(element, oldPath, false);
if (oldMenu.isNull())
continue;
QDomElement newMenu = q->findMenu(element, newPath, true);
if (isParent(oldMenu, newMenu))
continue;
appendChilds(oldMenu, newMenu);
oldMenu.parentNode().removeChild(oldMenu);
}
}
/************************************************
For each <Menu> containing a <Deleted> element which is not followed by a
<NotDeleted> element, remove that menu and all its child menus.
Kmenuedit create .hidden menu entry, delete it too.
************************************************/
void XdgMenuPrivate::deleteDeletedMenus(QDomElement& element)
{
MutableDomElementIterator i(element, QLatin1String("Menu"));
while(i.hasNext())
{
QDomElement e = i.next();
if (e.attribute(QLatin1String("deleted")) == QLatin1String("1") ||
e.attribute(QLatin1String("name")) == QLatin1String(".hidden")
)
element.removeChild(e);
else
deleteDeletedMenus(e);
}
}
void XdgMenuPrivate::processDirectoryEntries(QDomElement& element, const QStringList& parentDirs)
{
QStringList dirs;
QStringList files;
element.setAttribute(QLatin1String("title"), element.attribute(QLatin1String("name")));
MutableDomElementIterator i(element, QString());
i.toBack();
while(i.hasPrevious())
{
QDomElement e = i.previous();
if (e.tagName() == QLatin1String("Directory"))
{
files << e.text();
element.removeChild(e);
}
else if (e.tagName() == QLatin1String("DirectoryDir"))
{
dirs << e.text();
element.removeChild(e);
}
}
dirs << parentDirs;
bool found = false;
Q_FOREACH(const QString &file, files){
if (file.startsWith(QLatin1Char('/')))
found = loadDirectoryFile(file, element);
else
{
Q_FOREACH (const QString &dir, dirs)
{
found = loadDirectoryFile(dir + QLatin1Char('/') + file, element);
if (found) break;
}
}
if (found) break;
}
MutableDomElementIterator it(element, QLatin1String("Menu"));
while(it.hasNext())
{
QDomElement e = it.next();
processDirectoryEntries(e, dirs);
}
}
bool XdgMenuPrivate::loadDirectoryFile(const QString& fileName, QDomElement& element)
{
XdgDesktopFile file;
file.load(fileName);
if (!file.isValid())
return false;
element.setAttribute(QLatin1String("title"), file.localizedValue(QLatin1String("Name")).toString());
element.setAttribute(QLatin1String("comment"), file.localizedValue(QLatin1String("Comment")).toString());
element.setAttribute(QLatin1String("icon"), file.value(QLatin1String("Icon")).toString());
Q_Q(XdgMenu);
q->addWatchPath(QFileInfo(file.fileName()).absolutePath());
return true;
}
void XdgMenuPrivate::processApps(QDomElement& element)
{
Q_Q(XdgMenu);
XdgMenuApplinkProcessor processor(element, q);
processor.run();
}
void XdgMenuPrivate::deleteEmpty(QDomElement& element)
{
MutableDomElementIterator it(element, QLatin1String("Menu"));
while(it.hasNext())
deleteEmpty(it.next());
if (element.attribute(QLatin1String("keep")) == QLatin1String("true"))
return;
QDomElement childMenu = element.firstChildElement(QLatin1String("Menu"));
QDomElement childApps = element.firstChildElement(QLatin1String("AppLink"));
if (childMenu.isNull() && childApps.isNull())
{
element.parentNode().removeChild(element);
}
}
void XdgMenuPrivate::processLayouts(QDomElement& element)
{
XdgMenuLayoutProcessor proc(element);
proc.run();
}
void XdgMenuPrivate::fixSeparators(QDomElement& element)
{
MutableDomElementIterator it(element, QLatin1String("Separator"));
while(it.hasNext())
{
QDomElement s = it.next();
if (s.previousSiblingElement().tagName() == QLatin1String("Separator"))
element.removeChild(s);
}
QDomElement first = element.firstChild().toElement();
if (first.tagName() == QLatin1String("Separator"))
element.removeChild(first);
QDomElement last = element.lastChild().toElement();
if (last.tagName() == QLatin1String("Separator"))
element.removeChild(last);
MutableDomElementIterator mi(element, QLatin1String("Menu"));
while(mi.hasNext())
fixSeparators(mi.next());
}
/************************************************
$XDG_CONFIG_DIRS/menus/${XDG_MENU_PREFIX}applications.menu
The first file found in the search path should be used; other files are ignored.
************************************************/
QString XdgMenu::getMenuFileName(const QString& baseName)
{
const QStringList configDirs = XdgDirs::configDirs();
QString menuPrefix = QString::fromLocal8Bit(qgetenv("XDG_MENU_PREFIX"));
Q_FOREACH(const QString &configDir, configDirs)
{
QFileInfo file(QString::fromLatin1("%1/menus/%2%3").arg(configDir, menuPrefix, baseName));
if (file.exists())
return file.filePath();
}
QStringList wellKnownFiles;
// razor- is a priority for us
wellKnownFiles << QLatin1String("razor-applications.menu");
// the "global" menu file name on suse and fedora
wellKnownFiles << QLatin1String("applications.menu");
// rest files ordered by priority (descending)
wellKnownFiles << QLatin1String("kde4-applications.menu");
wellKnownFiles << QLatin1String("kde-applications.menu");
wellKnownFiles << QLatin1String("gnome-applications.menu");
wellKnownFiles << QLatin1String("lxde-applications.menu");
Q_FOREACH(const QString &configDir, configDirs)
{
Q_FOREACH (const QString &f, wellKnownFiles)
{
QFileInfo file(QString::fromLatin1("%1/menus/%2").arg(configDir, f));
if (file.exists())
return file.filePath();
}
}
return QString();
}
void XdgMenu::addWatchPath(const QString &path)
{
Q_D(XdgMenu);
if (d->mWatcher.files().contains(path))
return;
if (d->mWatcher.directories().contains(path))
return;
d->mWatcher.addPath(path);
}
bool XdgMenu::isOutDated() const
{
Q_D(const XdgMenu);
return d->mOutDated;
}
void XdgMenuPrivate::rebuild()
{
Q_Q(XdgMenu);
QByteArray prevHash = mHash;
q->read(mMenuFileName);
if (prevHash != mHash)
{
mOutDated = true;
Q_EMIT changed();
}
}
void XdgMenuPrivate::clearWatcher()
{
QStringList sl;
sl << mWatcher.files();
sl << mWatcher.directories();
if (sl.length())
mWatcher.removePaths(sl);
}
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