appfoundation/statemodel/src/hsstatefactory.cpp
changeset 60 f62f87b200ec
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/appfoundation/statemodel/src/hsstatefactory.cpp	Fri Mar 19 09:35:23 2010 +0200
@@ -0,0 +1,225 @@
+/*
+* Copyright (c) 2009 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:  State factory.
+*
+*/
+
+#include <QStringList>
+#include <QDir>
+#include <QPluginLoader>
+#include <QState>
+
+#include "hsstatefactory.h"
+#include "hsstatefactory_p.h"
+#include "hsstateprovidermanifest.h"
+#include "hstest_global.h"
+
+HsStateFactoryPrivate::HsStateFactoryPrivate(HsStateFactory* aPublic)
+    : QObject(aPublic),
+      mQ(aPublic)
+{
+
+}
+
+HsStateFactoryPrivate::~HsStateFactoryPrivate()
+{
+
+}
+
+QList<HsStateToken> HsStateFactoryPrivate::states()
+{
+    QStringList pluginPaths;
+
+    //Check plugin dirs from root of different drives
+    QFileInfoList drives = QDir::drives();
+    for(int i=0; i < drives.count(); i++)
+    {
+        QFileInfo drive = drives.at(i);
+        QString driveLetter = drive.absolutePath();
+        QString path = driveLetter + mPluginManifestDirectory;
+        if(QDir(path).exists())
+        {
+            pluginPaths << path;
+        }
+    }
+
+    //Check plugin dir relative to current dir
+    if(QDir(mPluginManifestDirectory).exists() && !pluginPaths.contains(QDir(mPluginManifestDirectory).absolutePath()))
+    {
+        pluginPaths << mPluginManifestDirectory;
+    }
+
+    QList<HsStateToken> states;
+
+    for(int h=0; h < pluginPaths.count(); h++)
+    {
+        QString path = pluginPaths.at(h);
+        QDir dir(path);
+        QStringList filters("*.manifest");
+
+        for(int i=0; i < dir.entryList(filters, QDir::Files).count(); ++i)
+        {
+            QString fileName = dir.entryList(filters, QDir::Files).at(i);
+
+            HsStateProviderManifest manifest;
+            manifest.loadFromXml(dir.absoluteFilePath(fileName));
+
+            if(manifest.loadOnQuery())
+            {
+                QList<HsStateToken> tokens = manifest.states();
+                for(int j=0; j < tokens.count(); ++j)
+                {
+                    HsStateToken token = tokens.at(j);
+                    IHsStateProvider* provider = loadProviderFromPlugin(token.mLibrary);
+                    if(provider)
+                    {
+                        states << provider->states();
+                        delete provider;
+                    }
+                }
+            }
+            else
+            {
+                states << manifest.states();
+            }
+        }
+    }
+    return states;
+}
+
+QState* HsStateFactoryPrivate::createState(const HsStateToken& aToken)
+{
+    IHsStateProvider* provider = loadProviderFromPlugin(aToken.mLibrary);
+    if(!provider)
+    {
+        HSDEBUG("Widget creation failed - No provider.")
+        return 0;
+    }
+
+    QState* state = provider->createState(aToken);
+    delete provider;
+    if(!state)
+    {
+        HSDEBUG("State creation failed.")
+    }
+    return state;
+}
+
+IHsStateProvider* HsStateFactoryPrivate::loadProviderFromPlugin(const QString& aPluginName)
+{
+    QStringList pluginPaths;
+
+    //Check plugin dirs from root of different drives
+    QFileInfoList drives = QDir::drives();
+    for(int i=0; i < drives.count(); i++)
+    {
+        QFileInfo drive = drives.at(i);
+        QString driveLetter = drive.absolutePath();
+        QString path = driveLetter + mPluginDirectory;
+        if(QDir(path).exists())
+        {
+            pluginPaths << path;
+        }
+    }
+
+
+    //Check plugin dir relative to current dir
+    if(QDir(mPluginManifestDirectory).exists() && !pluginPaths.contains(QDir(mPluginDirectory).absolutePath()))
+    {
+        pluginPaths << mPluginDirectory;
+    }
+
+    IHsStateProvider* provider = 0;
+    QPluginLoader loader;
+    QObject* plugin = 0;
+
+    for(int i=0; i < pluginPaths.count(); i++)
+    {
+        QString path = pluginPaths.at(i);
+        QString fileName = QDir(path).absoluteFilePath(aPluginName);
+
+        loader.setFileName(fileName);
+        plugin = loader.instance();
+        provider = qobject_cast<IHsStateProvider*>(plugin);
+        if(provider)
+        {
+            return provider;
+        }
+
+        //Don't leak memory if provider not IHsStateProvider
+        if(plugin)
+        {
+            HSDEBUG("State provider load - !provider, deleting plugin.")
+            delete plugin;
+        }
+    }
+
+    HSDEBUG("State provider load failed - Not found.")
+    return 0;
+}
+
+/*!
+    \class HsStateFactory
+    \ingroup group_hsstatemodel
+    \brief Finds and creates home screen states.
+    State factory finds home screen states from state provider
+    plugins. The search is done based on given plugin manifest
+    and plugin binary directories. Found states are returned as
+    a list of state tokens. State factory creates an instance of
+    a state base on a state token that is given to it.
+*/
+
+/*!
+    Constructor.
+    \a aPluginManifestDirectory Directory that contains plugin manifests.
+    \a aPluginDirectory Directory that contains plugin binaries.
+    \a aParent Parent object.
+*/
+HsStateFactory::HsStateFactory(const QString& aPluginManifestDirectory,
+                           const QString& aPluginDirectory,
+                           QObject* aParent)
+    : QObject(aParent)
+{
+    mD = new HsStateFactoryPrivate(this);
+    mD->mPluginManifestDirectory = aPluginManifestDirectory;
+    mD->mPluginDirectory = aPluginDirectory;
+}
+
+
+/*!
+    Destructor.
+*/
+HsStateFactory::~HsStateFactory()
+{
+
+}
+
+/*!
+    Returns found states as a list of state tokens.
+*/
+QList<HsStateToken> HsStateFactory::states()
+{
+    return mD->states();
+}
+
+/*!
+    Creates and returns a state based on the given token.
+    \a aToken Identifies the state to be created.
+
+    Returns The created state.
+*/
+QState* HsStateFactory::createState(const HsStateToken& aToken)
+{
+    return mD->createState(aToken);
+}