--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/taskswitcher/contextengine/tsfswserver/engine/inc/tsfswengine.h Tue Jan 26 11:48:23 2010 +0200
@@ -0,0 +1,326 @@
+/*
+* Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+* This component and the accompanying materials are made available
+* under the terms of "Eclipse Public License v1.0"
+* which accompanies this distribution, and is available
+* at the URL "http://www.eclipse.org/legal/epl-v10.html".
+*
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: Task monitor engine
+ *
+*/
+
+
+#ifndef TSFSWENGINE_H
+#define TSFSWENGINE_H
+
+#include <e32base.h>
+#include <e32cmn.h>
+#include <s32strm.h>
+#include <fbs.h>
+#include <eikenv.h>
+#include <w32std.h>
+#include <e32hashtab.h>
+#include <apgcli.h>
+#include <e32property.h>
+#include "tspreviewobserver.h"
+#include "tsfswentry.h"
+#include "tsfswobservers.h"
+
+class CTsFsAlwaysShownAppList;
+class CTsFsHiddenAppList;
+class CTsFsWidgetList;
+class MTsFswEngineObserver;
+class CTsFswIconCache;
+class CTsFastSwapPreviewProvider;
+class CApaWindowGroupName;
+
+// descriptor big enough to store hex repr of 32-bit integer plus 0x prefix
+typedef TBuf<10> TAppUidHexString;
+
+/**
+ * Engine for fast swap server.
+ * Performs task monitoring, notifications about wg changes are
+ * received from the appui.
+ */
+NONSHARABLE_CLASS( CTsFswEngine ) : public CActive,
+ public MTsFswTaskListObserver,
+ public MTsFswResourceObserver,
+ public MTsFsHiddenAppListObserver,
+ public MTsFastSwapPreviewObserver
+ {
+public:
+ /**
+ * Creates a new instance.
+ * @param aObserver ref to observer
+ */
+ IMPORT_C static CTsFswEngine* NewL( MTsFswEngineObserver& aObserver );
+
+ /**
+ * @copydoc NewL
+ */
+ IMPORT_C static CTsFswEngine* NewLC( MTsFswEngineObserver& aObserver );
+
+ /**
+ * Destructor.
+ */
+ ~CTsFswEngine();
+
+ /**
+ * Returns a reference to the current content.
+ * Also performs sanity checks, e.g. associates application icons
+ * when no screenshot has been received.
+ * @return ref to content array
+ */
+ IMPORT_C const RTsFswArray& FswDataL();
+
+ /**
+ * Tries to close the given app.
+ * @param aWgId value given by WgId() for an entry in iData
+ */
+ IMPORT_C void CloseAppL( TInt aWgId );
+
+ /**
+ * Brings the given app to foreground.
+ * @param aWgId value given by WgId() for an entry in iData
+ */
+ IMPORT_C void SwitchToAppL( TInt aWgId );
+
+ /**
+ * Returns the uid of the foreground app or KNullUid.
+ * Will never return hidden apps, only those which can
+ * also be seen in the array returned by FswDataL.
+ *
+ * In case of embedded apps the behaviour is controlled
+ * by aType: it will return either the uid of the embedded
+ * application or the container app.
+ *
+ * @param aType @see CTsFswClient::TTsFswFgAppType
+ */
+ IMPORT_C TUid ForegroundAppUidL( TInt aType );
+
+private:
+ // from CActive
+ void RunL();
+ TInt RunError( TInt aError );
+ void DoCancel();
+
+ // from MTsFswTaskListObserver
+ void UpdateTaskList();
+
+ // from MTsFswResourceObserver
+ void HandleResourceChange( TInt aType );
+
+ // from MTsFsHiddenAppListObserver
+ void HiddenAppListUpdated();
+
+ // from MTsFastSwapPreviewObserver
+ void HandleFswPpApplicationChange( TInt aWgId, TInt aFbsHandle );
+ void HandleFswPpApplicationUnregistered( TInt aWgId );
+
+private:
+ /**
+ * Constructor.
+ */
+ CTsFswEngine( MTsFswEngineObserver& aObserver );
+
+ /**
+ * Performs 2nd phase construction.
+ */
+ void ConstructL();
+
+ /**
+ * Gets the window group list and reconstructs the fsw content.
+ * @return TBool ETrue if the list has been modified
+ */
+ TBool CollectTasksL();
+
+ /**
+ * Called from CollectTasksL for each entry in the task list.
+ * @param aWgId window group id
+ * @param aAppUid application uid
+ * @param aWgName window group name or NULL
+ * @param aNewList list to add to
+ * @param aIsWidget true if the entry corresponds to a web widget
+ * @return TBool ETrue if it was really a new entry in the list
+ */
+ TBool AddEntryL( TInt aWgId, const TUid& aAppUid,
+ CApaWindowGroupName* aWgName, RTsFswArray& aNewList,
+ TBool aIsWidget );
+
+ /**
+ * Checks if there is an entry for same app in the content list.
+ * If yes then it takes some of the data for the entry that
+ * will correspond to the same app in the refreshed content list.
+ * @param aEntry new entry in content list
+ * @param aAppUid application uid
+ * @param aChanged ref to change-flag, set to ETrue if it is sure
+ * that the new content list will be different from the previous one
+ * @param aNewList ref to new content list
+ * @return ETrue if app was found
+ */
+ TBool CheckIfExistsL( CTsFswEntry& aEntry,
+ const TUid& aAppUid,
+ TBool& aChanged,
+ RTsFswArray& aNewList );
+
+ /**
+ * Adds running widgets to the list.
+ * @param aNewList array to add to
+ */
+ void CheckWidgetsL( RTsFswArray& aNewList );
+
+ /**
+ * Finds out the app uid for the given window group id.
+ * @param aWgId a valid window group id
+ * @return application uid
+ */
+ TUid AppUidForWgIdL( TInt aWgId );
+
+ /**
+ * Returns the parent's wg id or KErrNotFound.
+ * @param aWgId a valid window group id
+ * @return parent wg id or KErrNotFound if there is no parent
+ */
+ TInt FindParentWgId( TInt aWgId );
+
+ /**
+ * Finds out the application name.
+ * @param aWindowName window group name or NULL
+ * @param aAppUId application uid
+ * @param aWgId window group id
+ * @return application name, ownership transferred to caller
+ */
+ HBufC* FindAppNameLC( CApaWindowGroupName* aWindowName,
+ const TUid& aAppUid, TInt aWgId );
+
+ /**
+ * Makes a copy of the bitmap with the given handle.
+ * @param aFbsHandle bitmap handle
+ * @param aKeepAspectRatio if true then aspect ratio is kept
+ * @return CFbsBitmap* the copy, ownership transferred to caller
+ */
+ CFbsBitmap* CopyBitmapL( TInt aFbsHandle, TBool aKeepAspectRatio );
+
+ /**
+ * Checks if the app to which the screenshot belongs is in the task list
+ * and updates the entry when found. Also triggers change notification
+ * to observer when data is modified.
+ * @param aWgIdForScreenshot wgid for the screenshot
+ * @param aBitmapHandle handle for screenshot bitmap
+ */
+ void AssignScreenshotHandle( TInt aWgIdForScreenshot, TInt aBitmapHandle );
+
+ /**
+ * Returns the bitmap handle for the screenshot belonging to the given app
+ * or 0 if not (yet) found.
+ * @param aWgIdForApp a window group id (from the window group list)
+ * @return bitmap handle or 0
+ */
+ TInt LookupScreenshotHandle( TInt aWgIdForApp );
+
+ /**
+ * Callback for the iUpdateStarter timer.
+ * Calls CollectTasksL and notifies the observer if the task list
+ * has really been modified.
+ */
+ static TInt UpdateStarterCallback( TAny* aParam );
+
+ /**
+ * Brings the given web widget to foreground.
+ * @param aWidgetIndex index in the list of running widgets
+ */
+ void SwitchToWidgetL( TInt aWidgetIndex );
+
+ /**
+ * Configues the preview provider with current screen size.
+ */
+ void SetPreviewParams();
+
+ /**
+ * Registers and unregisters window groups to iPreviewProvider
+ * if the window group list has been changed.
+ */
+ void UpdatePreviewContent();
+
+ /**
+ * Gets and publishes the foreground app uid to CFW.
+ */
+ void PublishFgAppUidL();
+
+ /**
+ * Helper function to publish something to CFW.
+ * @param aType context type
+ * @param aValue value to publish
+ */
+ //void PublishContextL( const TDesC& aType, const TDesC& aValue );
+
+private: // data
+ MTsFswEngineObserver& iObserver;
+ RTsFswArray iData; // current fsw content, i.e. the task list
+ CEikonEnv* iEnv; // not own
+
+ // always shown app list, own
+ CTsFsAlwaysShownAppList* iAlwaysShownAppList;
+
+ // hidden app list, own
+ CTsFsHiddenAppList* iHiddenAppList;
+
+ // web widget list, own
+ CTsFsWidgetList* iWidgetList;
+
+ // window server session
+ RWsSession iWsSession;
+
+ // apparc session
+ RApaLsSession iAppArcSession;
+
+ /**
+ * Hash table storing the screenshots.
+ * Key: window group id for the screenshot
+ * (the one received in ApplicationChange)
+ * Value: CFbsBitmap*, pointers owned
+ */
+ RHashMap<TInt, CFbsBitmap*> iScreenshots;
+
+ // preview provider instance, own
+ CTsFastSwapPreviewProvider* iPreviewProvider;
+
+ // timer to defer content refresh
+ CPeriodic* iUpdateStarter;
+
+ // app icon provider/container instance, own
+ CTsFswIconCache* iAppIcons;
+
+ // true if web widgets are supported by the system
+ TBool iWidgetsSupported;
+ // wgid of widget appui is saved here
+ TInt iWidgetAppUiWgId;
+
+ // PS property to listen for swi status changes
+ RProperty iSwiProp;
+ // when true CollectTasksL will call GetAllApps etc.
+ // which is slow and need not be done normally, except
+ // during startup and perhaps when new applications are installed
+ TBool iAppDataRefreshNeeded;
+
+ // window group ids returned by last WindowGroupList call
+ RArray<TInt> iWgIds;
+
+ // Dirty flag, indicates that iData is not up-to-date because
+ // there were no subscribed clients during a previous possible
+ // change of the task list.
+ TBool iTaskListDirty;
+
+ // For publishing the foreground app uid to Context Framework
+ TAppUidHexString iFgAppUidStr;
+ TUid iFgAppUid;
+
+ };
+
+#endif