Akonadi::MimeTypeChecker Class Reference

#include <mimetypechecker.h>

Public Member Functions
	MimeTypeChecker ()
	MimeTypeChecker (const MimeTypeChecker &other)
	~MimeTypeChecker ()
void	addWantedMimeType (const QString &mimeType)
bool	containsWantedMimeType (const QStringList &mimeTypes) const
bool	hasWantedMimeTypes () const
bool	isWantedCollection (const Collection &collection) const
bool	isWantedItem (const Item &item) const
bool	isWantedMimeType (const QString &mimeType) const
MimeTypeChecker &	operator= (const MimeTypeChecker &other)
void	removeWantedMimeType (const QString &mimeType)
void	setWantedMimeTypes (const QStringList &mimeTypes)
QStringList	wantedMimeTypes () const

Static Public Member Functions
static bool	isWantedCollection (const Collection &collection, const QString &wantedMimeType)
static bool	isWantedItem (const Item &item, const QString &wantedMimeType)

Detailed Description

Helper for checking MIME types of Collections and Items.

When it is necessary to decide whether an item has a certain MIME type or whether a collection can contain a certain MIME type, direct string comparison might not render the desired result because MIME types can have aliases and be a node in an "inheritance" hierarchy.

For example a check like this

if ( item.mimeType() == QLatin1StringView( "text/directory" ) )

would fail to detect "text/x-vcard" as being the same MIME type.

Note

KDE deals with this inside the KMimeType framework, this class is just a convenience helper for common Akonadi related checks.

Example: Checking whether an Akonadi::Item is contact MIME type

Akonadi::MimeTypeChecker checker;
checker.addWantedMimeType( KContacts::Addressee::mimeType() );
 
if ( checker.isWantedItem( item ) ){
  // item.mimeType() is equal KContacts::Addressee::mimeType(), an aliases
  // or a sub type.
}

Example: Checking whether an Akonadi::Collection could contain calendar items

Akonadi::MimeTypeChecker checker;
checker.addWantedMimeType( QLatin1StringView( "text/calendar" ) );
 
if ( checker.isWantedCollection( collection ) ) {
  // collection.contentMimeTypes() contains @c "text/calendar"
  // or a sub type.
}

Example: Checking whether an Akonadi::Collection could contain Calendar Event items (i.e. KCal::Event), making use of the respective MIME type "subclassing" provided by Akonadi's MIME type extensions.

Akonadi::MimeTypeChecker checker;
checker.addWantedMimeType( QLatin1StringView( "application/x-vnd.akonadi.calendar.event" ) );
 
if ( checker.isWantedCollection( collection ) ) {
  // collection.contentMimeTypes() contains @c "application/x-vnd.akonadi.calendar.event"
  // or a sub type, but just containing @c "text/calendar" would not
  // get here
}

Example: Checking for items of more than one MIME type and treat one of them specially.

Akonadi::MimeTypeChecker mimeFilter;
mimeFilter.setWantedMimeTypes( QStringList() << KContacts::Addressee::mimeType()
                               << KContacts::ContactGroup::mimeType() );
 
if ( mimeFilter.isWantedItem( item ) ) {
  if ( Akonadi::MimeTypeChecker::isWantedItem( item, KContacts::ContactGroup::mimeType() ) {
    // treat contact group's differently
  }
}

This class is implicitly shared.

Author

Kevin Krammer kevin.nosp@m..kra.nosp@m.mmer@.nosp@m.gmx..nosp@m.at

Since

4.3

Definition at line 96 of file mimetypechecker.h.

Constructor & Destructor Documentation

MimeTypeChecker() [1/2]

MimeTypeChecker::MimeTypeChecker

(

)

Creates an empty MIME type checker.

An empty checker will not report any items or collections as wanted.

Definition at line 16 of file mimetypechecker.cpp.

MimeTypeChecker() [2/2]

MimeTypeChecker::MimeTypeChecker

(

const MimeTypeChecker &

other

)

Creates a new MIME type checker from an other.

Definition at line 21 of file mimetypechecker.cpp.

~MimeTypeChecker()

MimeTypeChecker::~MimeTypeChecker

(

)

Destroys the MIME type checker.

Definition at line 26 of file mimetypechecker.cpp.

Member Function Documentation

addWantedMimeType()

void MimeTypeChecker::addWantedMimeType

(

const QString &

mimeType

)

Adds another MIME type to the list of wanted MIME types this instance checks against.

Parameters

mimeType

The MIME types to add to the checklist.

See also

setWantedMimeTypes()

Definition at line 54 of file mimetypechecker.cpp.

containsWantedMimeType()

bool MimeTypeChecker::containsWantedMimeType

(

const QStringList &

mimeTypes

)

const

Checks whether any of the given MIME types is covered by one of the wanted MIME types.

Parameters

mimeTypes

The MIME types to check.

Returns

true if any of the MIME types in mimeTypes is coverd by one of the wanted MIME types, false otherwise.

Since

4.6

Definition at line 165 of file mimetypechecker.cpp.

hasWantedMimeTypes()

bool MimeTypeChecker::hasWantedMimeTypes

(

)

const

Checks whether any wanted MIME types are set.

Returns

true if any wanted MIME types are set, false otherwise.

Since

5.6.43

Definition at line 44 of file mimetypechecker.cpp.

isWantedCollection() [1/2]

bool MimeTypeChecker::isWantedCollection

(

const Collection &

collection

)

const

Checks whether a given collection has one of the wanted MIME types.

Parameters

collection

The collection to check the content MIME types of.

Returns

true if one of the collection content MIME types is one of the wanted ones, false if non is, the collection is invalid or has an empty content MIME type list.

See also

setWantedMimeTypes()

Collection::contentMimeTypes()

Definition at line 78 of file mimetypechecker.cpp.

isWantedCollection() [2/2]

bool MimeTypeChecker::isWantedCollection ( const Collection & collection, const QString & wantedMimeType )

static

Checks whether a given collection has the given MIME type.

Parameters

collection	The collection to check the content MIME types of.
wantedMimeType	The MIME type to check against.

Returns

true if one of the collection content MIME types is the given wanted one, false if it isn't, the collection is invalid or has an empty content MIME type list.

See also

setWantedMimeTypes()

Collection::contentMimeTypes()

Definition at line 126 of file mimetypechecker.cpp.

isWantedItem() [1/2]

bool MimeTypeChecker::isWantedItem

(

const Item &

item

)

const

Checks whether a given item has one of the wanted MIME types.

Parameters

item	The item to check the MIME type of.

Returns

true if the item MIME type is one of the wanted ones, false if it isn't, the item is invalid or has an empty MIME type.

See also

setWantedMimeTypes()

Item::mimeType()

Definition at line 64 of file mimetypechecker.cpp.

isWantedItem() [2/2]

bool MimeTypeChecker::isWantedItem ( const Item & item, const QString & wantedMimeType )

static

Checks whether a given item has the given wanted MIME type.

Parameters

item	The item to check the MIME type of.
wantedMimeType	The MIME type to check against.

Returns

true if the item MIME type is the given one, false if it isn't, the item is invalid or has an empty MIME type.

See also

setWantedMimeTypes()

Item::mimeType()

Definition at line 102 of file mimetypechecker.cpp.

isWantedMimeType()

bool MimeTypeChecker::isWantedMimeType

(

const QString &

mimeType

)

const

Checks whether a given mime type is covered by one of the wanted MIME types.

Parameters

mimeType

The mime type to check.

Returns

true if the mime type mimeType is coverd by one of the wanted MIME types, false otherwise.

Since

4.6

Definition at line 160 of file mimetypechecker.cpp.

operator=()

MimeTypeChecker & MimeTypeChecker::operator=

(

const MimeTypeChecker &

other

)

Assigns the other to this checker and returns a reference to this checker.

Definition at line 30 of file mimetypechecker.cpp.

removeWantedMimeType()

void MimeTypeChecker::removeWantedMimeType

(

const QString &

mimeType

)

Removes a MIME type from the list of wanted MIME types this instance checks against.

Parameters

mimeType

The MIME type to remove from the checklist.

See also

addWantedMimeType()

Definition at line 59 of file mimetypechecker.cpp.

setWantedMimeTypes()

void MimeTypeChecker::setWantedMimeTypes

(

const QStringList &

mimeTypes

)

Sets the list of wanted MIME types this instance checks against.

Parameters

mimeTypes

The list of MIME types to check against.

See also

wantedMimeTypes()

Definition at line 49 of file mimetypechecker.cpp.

wantedMimeTypes()

QStringList MimeTypeChecker::wantedMimeTypes

(

)

const

Returns the list of wanted MIME types this instance checks against.

Note

Don't use this just to check whether there are any wanted mimetypes. It is much faster to call hasWantedMimeTypes() instead for that purpose.

See also

setWantedMimeTypes(), hasWantedMimeTypes()

Definition at line 39 of file mimetypechecker.cpp.

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The documentation for this class was generated from the following files:

• mimetypechecker.h
• mimetypechecker.cpp