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pcmanfm-qt-packaging/libfm-qt/browsehistory.h

132 lines
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/*
Copyright (C) 2013 Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
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.
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. See the
GNU General Public License for more details.
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 USA.
*/
#ifndef FM_BROWSEHISTORY_H
#define FM_BROWSEHISTORY_H
#include "libfmqtglobals.h"
#include <QVector>
#include <libfm/fm.h>
namespace Fm {
// class used to story browsing history of folder views
// We use this class to replace FmNavHistory provided by libfm since
// the original Libfm API is hard to use and confusing.
class LIBFM_QT_API BrowseHistoryItem {
public:
BrowseHistoryItem():
path_(NULL),
scrollPos_(0) {
}
BrowseHistoryItem(FmPath* path, int scrollPos = 0):
path_(fm_path_ref(path)),
scrollPos_(scrollPos) {
}
BrowseHistoryItem(const BrowseHistoryItem& other):
path_(other.path_ ? fm_path_ref(other.path_) : NULL),
scrollPos_(other.scrollPos_) {
}
~BrowseHistoryItem() {
if(path_)
fm_path_unref(path_);
}
BrowseHistoryItem& operator=(const BrowseHistoryItem& other) {
if(path_)
fm_path_unref(path_);
path_ = other.path_ ? fm_path_ref(other.path_) : NULL;
scrollPos_ = other.scrollPos_;
return *this;
}
FmPath* path() const {
return path_;
}
int scrollPos() const {
return scrollPos_;
}
void setScrollPos(int pos) {
scrollPos_ = pos;
}
private:
FmPath* path_;
int scrollPos_;
// TODO: we may need to store current selection as well. reserve room for furutre expansion.
// void* reserved1;
// void* reserved2;
};
class LIBFM_QT_API BrowseHistory : public QVector<BrowseHistoryItem> {
public:
BrowseHistory();
virtual ~BrowseHistory();
int currentIndex() const {
return currentIndex_;
}
void setCurrentIndex(int index);
FmPath* currentPath() const {
return at(currentIndex_).path();
}
int currentScrollPos() const {
return at(currentIndex_).scrollPos();
}
BrowseHistoryItem& currentItem() {
return operator[](currentIndex_);
}
void add(FmPath* path, int scrollPos = 0);
bool canForward() const;
bool canBackward() const;
int backward();
int forward();
int maxCount() const {
return maxCount_;
}
void setMaxCount(int maxCount);
private:
int currentIndex_;
int maxCount_;
};
}
#endif // FM_BROWSEHISTORY_H