A cache for source strings that returns a local file path containing the source content. More...

#include <qgssourcecache.h>

Inheritance diagram for QgsSourceCache:

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Signals
void	remoteSourceFetched (const QString &url)
	Emitted when the cache has finished retrieving a 3D model from a remote url.

Signals inherited from QgsAbstractContentCacheBase
void	remoteContentFetched (const QString &url)
	Emitted when the cache has finished retrieving content from a remote url.

Public Member Functions
	QgsSourceCache (QObject *parent=nullptr)
	Constructor for QgsSourceCache, with the specified parent object.

QString	localFilePath (const QString &path, bool blocking=false)
	Returns a local file path reflecting the content of a specified source path.

Public Member Functions inherited from QgsAbstractContentCache< QgsSourceCacheEntry >
	QgsAbstractContentCache (QObject *parent=nullptr, const QString &typeString=QString(), long maxCacheSize=20000000, int fileModifiedCheckTimeout=30000)
	Constructor for QgsAbstractContentCache, with the specified parent object.

	~QgsAbstractContentCache () override

Public Member Functions inherited from QgsAbstractContentCacheBase
	QgsAbstractContentCacheBase (QObject *parent)
	Constructor for QgsAbstractContentCacheBase, with the specified parent object.

Additional Inherited Members
Static Public Member Functions inherited from QgsAbstractContentCacheBase
static bool	isBase64Data (const QString &path)
	Returns `true` if path represents base64 encoded data.

static bool	parseBase64DataUrl (const QString &path, QString mimeType=nullptr, QString data=nullptr)
	Parses a path to determine if it represents a base 64 encoded HTML data URL, and if so, extracts the components of the URL.

Protected Slots inherited from QgsAbstractContentCacheBase
Protected Member Functions inherited from QgsAbstractContentCache< QgsSourceCacheEntry >
QgsSourceCacheEntry *	findExistingEntry (QgsSourceCacheEntry *entryTemplate)
	Returns the existing entry from the cache which matches entryTemplate (deleting entryTemplate when done), or if no existing entry is found then entryTemplate is transferred to the cache and returned.

QByteArray	getContent (const QString &path, const QByteArray &missingContent, const QByteArray &fetchingContent, bool blocking=false) const
	Gets the file content corresponding to the given path.

void	onRemoteContentFetched (const QString &url, bool success) override
	Triggered after remote content (i.e.

void	trimToMaximumSize ()
	Removes the least used cache entries until the maximum cache size is under the predefined size limit.

bool	waitForTaskFinished (QgsNetworkContentFetcherTask *task) const
	Blocks the current thread until the task finishes (or user's preset network timeout expires)

Protected Member Functions inherited from QgsAbstractContentCacheBase
virtual bool	checkReply (QNetworkReply *reply, const QString &path) const
	Runs additional checks on a network reply to ensure that the reply content is consistent with that required by the cache.

Protected Attributes inherited from QgsAbstractContentCache< QgsSourceCacheEntry >
long	mMaxCacheSize
	Maximum cache size.

QRecursiveMutex	mMutex

long	mTotalSize
	Estimated total size of all cached content.

Detailed Description

A cache for source strings that returns a local file path containing the source content.

QgsSourceCache is not usually directly created, but rather accessed through QgsApplication::sourceCache().

Since: QGIS 3.16

Definition at line 72 of file qgssourcecache.h.

Constructor & Destructor Documentation

◆ QgsSourceCache()

QgsSourceCache::QgsSourceCache ( QObject * parent = nullptr )

Constructor for QgsSourceCache, with the specified parent object.

Definition at line 57 of file qgssourcecache.cpp.

Member Function Documentation

◆ localFilePath()

QString QgsSourceCache::localFilePath	(	const QString &	path,
		bool	blocking = `false`
	)

Returns a local file path reflecting the content of a specified source path.

path may be a local file, remote (HTTP) url, or a base 64 encoded string (with a "base64:" prefix).

Definition at line 65 of file qgssourcecache.cpp.

◆ remoteSourceFetched

void QgsSourceCache::remoteSourceFetched ( const QString & url )

signal

Emitted when the cache has finished retrieving a 3D model from a remote url.

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

/build/qgis-3.40.0+99sid/src/core/qgssourcecache.h
/build/qgis-3.40.0+99sid/src/core/qgssourcecache.cpp

Signals