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documented; refs #116

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This commit is contained in:
Marc Wäckerlin
2012-04-18 11:33:57 +00:00
parent 9802fa5b1d
commit b7279a5eab
1 changed files with 19 additions and 15 deletions
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34
src/qbrowserlib/filestorage.hxx
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@@ -14,29 +14,44 @@
#include <cassert> #include <cassert>
//! Store string lists.
/** Abstract storage interface to string lists, such as bookmarks. */
class Storage: public QObject { class Storage: public QObject {
Q_OBJECT; Q_OBJECT;
Q_SIGNALS: Q_SIGNALS:
//! Emitted if file content has changed.
void changed(); void changed();
public: public:
Storage() {} Storage() {}
/*! @return true if readable or writable */
bool valid() { bool valid() {
return readable() || writeable(); return readable() || writeable();
} }
/*! @return true if valid */
operator bool() { operator bool() {
return valid(); return valid();
} }
/*! @return true if storage object already exists */
virtual bool readable() = 0; virtual bool readable() = 0;
/*! @return true if storage object exists or could be created */
virtual bool writeable() = 0; virtual bool writeable() = 0;
/*! @return storage content as string list */
virtual QStringList read() = 0; virtual QStringList read() = 0;
//! Writes storage content from string list.
virtual bool write(const QStringList& out) = 0; virtual bool write(const QStringList& out) = 0;
}; };
//! Implement @ref Storage for files.
class FileStorage: public Storage { class FileStorage: public Storage {
Q_OBJECT; Q_OBJECT;
public: public:
/*! @param file full path to storage file */
FileStorage(QString file): _file(file) { FileStorage(QString file): _file(file) {
if (valid()) setupWatcher(); _watcher.addPath(QFileInfo(_file).absolutePath());
assert(connect(&_watcher, SIGNAL(directoryChanged(const QString&)),
SLOT(setupWatcher())));
assert(connect(&_watcher, SIGNAL(fileChanged(const QString&)),
SIGNAL(changed())));
} }
bool readable() { bool readable() {
return QFileInfo(_file).exists(); return QFileInfo(_file).exists();
@@ -66,21 +81,10 @@ class FileStorage: public Storage {
} }
private Q_SLOTS: private Q_SLOTS:
void setupWatcher() { void setupWatcher() {
if (!_watcher) { _watcher.removePaths(_watcher.files());
_watcher = new QFileSystemWatcher(this); if (readable()) _watcher.addPath(_file.fileName());
_watcher->addPath(QFileInfo(_file).absolutePath());
assert(connect(_watcher, SIGNAL(directoryChanged(const QString&)),
SLOT(setupWatcher())));
assert(connect(_watcher, SIGNAL(fileChanged(const QString&)),
SIGNAL(changed())));
}
if (readable()) {
_watcher->removePaths(_watcher->files());
_watcher->addPath(_file.fileName());
}
} }
private: private:
QFile _file; QFile _file;
QFileSystemWatcher* _watcher; QFileSystemWatcher _watcher;
}; };