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//===========================================
// Lumina-DE source code
// Copyright (c) 2015, Ken Moore
// Available under the 3-clause BSD license
// See the LICENSE file for full details
//===========================================
// This is the backend classes for fetching directory information/contents
//===========================================
#ifndef _LUMINA_FM_BACKGROUND_DATA_CLASSES_H
#define _LUMINA_FM_BACKGROUND_DATA_CLASSES_H
#include <QObject>
#include <QList>
#include <QString>
#include <QFileInfo>
#include <QDir>
#include <LuminaXDG.h>
#include <LuminaUtils.h>
//Need some extra information not usually available by a QFileInfo
class LFileInfo : public QFileInfo{
private:
QString mime, icon;
XDGDesktop desk;
void loadExtraInfo(){
//Now load the extra information
if(this->isDir()){
mime = "inode/directory";
//Special directory icons
QString name = this->fileName().toLower();
if(name=="desktop"){ icon = "user-desktop"; }
else if(name=="tmp"){ icon = "folder-temp"; }
else if(name=="video" || name=="videos"){ icon = "folder-video"; }
else if(name=="music" || name=="audio"){ icon = "folder-sound"; }
else if(name=="projects" || name=="devel"){ icon = "folder-development"; }
else if(name=="notes"){ icon = "folder-txt"; }
else if(name=="downloads"){ icon = "folder-downloads"; }
else if(name=="documents"){ icon = "folder-documents"; }
else if(name=="images" || name=="pictures"){ icon = "folder-image"; }
else if( !this->isReadable() ){ icon = "folder-locked"; }
}else if( this->suffix()=="desktop"){
mime = "application/x-desktop";
icon = "application-x-desktop"; //default value
bool ok = false;
desk = LXDG::loadDesktopFile(this->absoluteFilePath(), ok);
if(ok){
//use the specific desktop file info (if possible)
if(!desk.icon.isEmpty()){ icon = desk.icon; }
}
}else{
//Generic file, just determine the mimetype
mime = LXDG::findAppMimeForFile(this->fileName());
}
}
public:
LFileInfo(QString filepath){ //overloaded contructor
this->setFile(filepath);
loadExtraInfo();
}
LFileInfo(QFileInfo info){ //overloaded contructor
this->swap(info); //use the given QFileInfo without re-loading it
loadExtraInfo();
}
~LFileInfo(){}
//Functions for accessing the extra information
// -- Return the mimetype for the file
QString mimetype(){
return mime;
}
// -- Return the icon to use for this file
QString iconfile(){
return (icon.isEmpty() ? mime: icon); //Fall back on the mimetype if no icon listed
}
// -- Check if this is an XDG desktop file
bool isDesktopFile(){
return (!desk.filePath.isEmpty());
}
// -- Allow access to the XDG desktop data structure
const XDGDesktop* XDG(){
return &desk;
}
// -- Check if this is a readable image file (for thumbnail support)
bool isImage(){
if(!mime.startsWith("image/")){ return false; } //quick return for non-image files
//Check the Qt subsystems to see if this image file can be read
return ( !LUtils::imageExtensions().filter(this->suffix().toLower()).isEmpty() );
}
};
class LDirInfoList{
public:
//Internal variables
QDateTime lastcheck;
QList<LFileInfo> list;
QStringList fileNames; //list of filenames for comparison/checking sorting
QString dirpath; //directory this structure was reading
bool hashidden;
//Access Functions
LDirInfoList(QString path = ""){
dirpath = path;
list.clear();
fileNames.clear();
hashidden = false;
}
~LDirInfoList(){}
//(re)Load a directory contents
void update(bool showhidden = false){
if(dirpath.isEmpty()){ return; } //nothing to do
//Assemble the structures
QDir dir(dirpath);
hashidden = showhidden;
if(!dir.exists()){
list.clear();
fileNames.clear();
dirpath.clear(); //invalid directory now
return;
}
QFileInfoList dirlist;
//Fill the structure
list.clear();
fileNames.clear();
lastcheck = QDateTime::currentDateTime();
if(showhidden){ dirlist = dir.entryInfoList(QDir::AllEntries | QDir::NoDotAndDotDot | QDir::Hidden , QDir::Name | QDir::DirsFirst); }
else{ dirlist = dir.entryInfoList(QDir::AllEntries | QDir::NoDotAndDotDot , QDir::Name | QDir::DirsFirst); }
//Simple add routine - can make it more dynamic/selective about updating individual items later
for(int i=0; i<dirlist.length(); i++){
list << LFileInfo(dirlist[i]); //generate the extra information for this file
fileNames << dirlist[i].fileName(); //add the filename to the list
}
}
};
//This class is designed to be run in a background thread and get all the necessary info for a directory listing
class DirData : public QObject{
Q_OBJECT
private:
QHash<QString, LDirInfoList> HASH; //Where we cache any info for rapid access later
signals:
void DirDataAvailable(QString, QList<LFileInfo>); //[ID, DATA]
public:
//Variables
bool showHidden;
//Functions
DirData(){
showHidden = false;
}
~DirData(){}
public slots:
void GetDirData(QString ID, QString dirpath){
//The ID is used when returning the info in a moment
if(!HASH.contains(dirpath)){
//New directory (not previously loaded)
LDirInfoList info(dirpath);
info.update(showHidden);
HASH.insert(dirpath, info);
}else{
//See if the saved info needs to be updated
if( (HASH.value(dirpath).hashidden != showHidden) || (QFileInfo(dirpath).lastModified() > HASH.value(dirpath).lastcheck) ){
HASH[dirpath].update(showHidden);
}
}
emit DirDataAvailable(ID, HASH.value(dirpath).list);
}
};
#endif
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