author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Thu, 17 Dec 2009 08:45:44 +0200 | |
changeset 0 | 4e91876724a2 |
child 1 | 9ba538e329bd |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: Generic fetch context to retrieve attributes |
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* |
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*/ |
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#include <AknUtils.h> |
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#include "glxattributecontext.h" |
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#include "mglxmedialist.h" |
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#include "glxerrormanager.h" |
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#include "glxtracer.h" |
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#include "glxlog.h" |
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#include "glxlistutils.h" |
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// Default granularity of items to request for |
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const TUint KGlxAttributeContextDefaultGranularity = 200; |
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const TInt KVisibleItemsCorrectionValue = 1; |
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const TInt KVisibleItemsModFactor = 2; |
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// ----------------------------------------------------------------------------- |
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// Constructor |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CGlxAttributeContext::CGlxAttributeContext(MGlxMediaListIterator* aIterator) : |
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iIterator(aIterator), |
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iGranularity(KGlxAttributeContextDefaultGranularity) |
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{ |
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TRACER("CGlxAttributeContext::Default Constructor"); |
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__ASSERT_DEBUG(aIterator, Panic(EGlxPanicNullPointer)); |
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} |
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// ----------------------------------------------------------------------------- |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CGlxAttributeContext::~CGlxAttributeContext() |
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{ |
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TRACER("CGlxAttributeContext:: Destructor"); |
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iAttributes.Close(); |
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} |
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// ----------------------------------------------------------------------------- |
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// Adds an attribute to be retrieved for all items |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxAttributeContext::AddAttributeL(const TMPXAttribute& aAttribute) |
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{ |
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TRACER("CGlxAttributeContext::AddAttributeL"); |
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// Check that the attribute is not added twice |
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TIdentityRelation<TMPXAttribute> match (&TMPXAttribute::Match); |
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TInt index = iAttributes.Find(aAttribute, match); |
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// Add the attribute |
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if (KErrNotFound == index) |
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{ |
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iAttributes.AppendL(aAttribute); |
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} |
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} |
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// ----------------------------------------------------------------------------- |
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// Removes an attribute from the "retrieval instructions" |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxAttributeContext::RemoveAttribute(const TMPXAttribute& aAttribute) |
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{ |
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TRACER("CGlxAttributeContext::RemoveAttribute"); |
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// Check that the attribute to be removed exists |
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TIdentityRelation<TMPXAttribute> match (&TMPXAttribute::Match); |
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TInt index = iAttributes.Find(aAttribute, match); |
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// Remove the attribute |
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if (KErrNotFound != index) |
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{ |
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iAttributes.Remove(index); |
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} |
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} |
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// ----------------------------------------------------------------------------- |
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// CGlxDefaultAttributeContext::AttributeCount |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C TInt CGlxAttributeContext::AttributeCount() |
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{ |
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TRACER("CGlxAttributeContext::AttributeCount"); |
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return iAttributes.Count(); |
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} |
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105 |
|
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106 |
// ----------------------------------------------------------------------------- |
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107 |
// Sets granularity of the item index array returned from AttributeRequestL |
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108 |
// ----------------------------------------------------------------------------- |
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EXPORT_C void CGlxAttributeContext::SetGranularity(TUint aGranularity) |
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110 |
{ |
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TRACER("CGlxAttributeContext::SetGranularity"); |
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112 |
|
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iGranularity = aGranularity; |
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114 |
} |
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115 |
|
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116 |
// ----------------------------------------------------------------------------- |
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// Get attributes request for an item |
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// From MGlxFetchContext |
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// ----------------------------------------------------------------------------- |
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120 |
// |
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TInt CGlxAttributeContext::AttributeRequestL(const MGlxMediaList* aList, |
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RArray<TInt>& aItemIndices, RArray<TMPXAttribute>& aAttributes, |
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CMPXAttributeSpecs*& /*aDetailedSpecs*/) const |
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124 |
{ |
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TRACER("CGlxAttributeContext::AttributeRequestL"); |
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126 |
|
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TInt itemCount = aList->Count(); |
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if (0 == itemCount || !iIterator) |
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129 |
{ |
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return 0; |
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131 |
} |
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132 |
|
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// Check through the items in the order defined by the iterator |
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iIterator->SetToFirst(aList); |
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135 |
|
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// Loop until iterator does not give any more indexes or granularity reached |
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TInt index = KErrNotFound; |
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TInt error = KErrNone; |
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TBool firstItem = ETrue; |
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TInt defaultVisItems = GlxListUtils::VisibleItemsGranularityL(); |
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if (defaultVisItems%KVisibleItemsModFactor == 0) |
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142 |
{ |
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defaultVisItems += KVisibleItemsCorrectionValue; |
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144 |
} |
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145 |
|
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while ((KErrNotFound != (index = (*iIterator)++)) && (aItemIndices.Count() < iGranularity) && (KErrNone == error)) |
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147 |
{ |
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148 |
// Check if this item is lacking attributes |
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TBool attributesAdded = AddItemAttributesL(index, aList, aAttributes, error, firstItem); |
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if (attributesAdded) |
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151 |
{ |
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aItemIndices.AppendL(index); |
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GLX_DEBUG3("CGlxAttributeContext::AttributeRequestL() index=%d, Media Id=%d", |
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index, aList->Item(index).Id().Value()); |
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firstItem = EFalse; |
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156 |
|
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// Fetch the visible items attrib first |
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if (aItemIndices[0] == (aList->VisibleWindowIndex()+ (defaultVisItems/2)) |
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&& aItemIndices.Count() == defaultVisItems) |
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160 |
{ |
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GLX_DEBUG1("Break to fetch the visible items attrib first"); |
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break; |
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163 |
} |
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164 |
} |
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else if ( firstItem && ( error != KErrNone ) ) |
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166 |
{ |
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// Continue iterating through the list |
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// if the first item had errors |
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// See EMYP-79VDHP |
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error = KErrNone; |
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171 |
} |
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172 |
} |
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173 |
|
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// If an error was found, return KErrGeneral |
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if (error != KErrNone) |
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176 |
{ |
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return KErrGeneral; |
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178 |
} |
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179 |
|
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GLX_DEBUG2("CGlxAttributeContext::AttributeRequestL() aItemIndices.Count()=%d", |
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aItemIndices.Count()); |
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return aItemIndices.Count(); |
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183 |
} |
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184 |
|
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// ----------------------------------------------------------------------------- |
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// Get all attributes required for the item (whether the are fetched or not) |
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// From MGlxFetchContext |
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188 |
// ----------------------------------------------------------------------------- |
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189 |
// |
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void CGlxAttributeContext::AllAttributesL(const MGlxMediaList* aList, TInt aListIndex, |
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RArray<TMPXAttribute>& aAttributes) const |
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192 |
{ |
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TRACER("CGlxAttributeContext::AllAttributesL"); |
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194 |
|
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// An empty request makes no sense, but won't do any harm. |
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196 |
|
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197 |
// If no iterator, no request |
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if (!iIterator || !iAttributes.Count()) |
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199 |
{ |
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200 |
return; |
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201 |
} |
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202 |
|
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203 |
// No requests outside range |
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iIterator->SetToFirst(aList); |
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if (!iIterator->InRange(aListIndex)) |
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206 |
{ |
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207 |
return; |
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208 |
} |
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209 |
|
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// Just list all attributes specified for this context |
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TInt count = iAttributes.Count(); |
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for (TInt i = 0; i < count; i++) |
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{ |
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aAttributes.AppendL(iAttributes[i]); |
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} |
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} |
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217 |
|
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// ----------------------------------------------------------------------------- |
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// Number of current requests |
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// From MGlxFetchContext |
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// ----------------------------------------------------------------------------- |
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TInt CGlxAttributeContext::RequestCountL(const MGlxMediaList* aList) const |
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{ |
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TRACER("CGlxAttributeContext::RequestCountL"); |
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225 |
|
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RArray<TInt> itemIndices; |
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CleanupClosePushL(itemIndices); |
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228 |
|
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RArray<TMPXAttribute> attributes; |
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CleanupClosePushL(attributes); |
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231 |
|
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CMPXAttributeSpecs* attrSpecs = NULL; |
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233 |
|
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TInt requestCount = AttributeRequestL(aList, itemIndices, attributes, attrSpecs); |
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235 |
|
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delete attrSpecs; |
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237 |
|
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CleanupStack::PopAndDestroy(&attributes); |
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CleanupStack::PopAndDestroy(&itemIndices); |
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240 |
|
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return requestCount; |
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} |
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243 |
|
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// ----------------------------------------------------------------------------- |
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// Check if the item at the index requires any attributes to be added to request |
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// ----------------------------------------------------------------------------- |
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TBool CGlxAttributeContext::AddItemAttributesL(TInt aIndexInList, |
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const MGlxMediaList* aList, RArray<TMPXAttribute>& aAttributes, |
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TInt& aError, TBool aFirstItem) const |
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250 |
{ |
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TRACER("CGlxAttributeContext::AddItemAttributesL"); |
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252 |
|
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TInt attributesAdded = EFalse; |
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254 |
|
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const TGlxMedia& m = aList->Item(aIndexInList); |
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if (!m.IsStatic()) |
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257 |
{ |
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const CGlxMedia* media = m.Properties(); |
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TInt attributeCount = iAttributes.Count(); |
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if (!media) |
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261 |
{ |
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// There are no attributes for this item |
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// Add all attributes |
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for (TInt count = 0; count < attributeCount; ++count) |
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265 |
{ |
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AddItemAttributeL(aAttributes, iAttributes[count]); |
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} |
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268 |
|
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if ( attributeCount > 0 ) |
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270 |
{ |
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attributesAdded = ETrue; |
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} |
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} |
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else |
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275 |
{ |
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if ( GlxErrorManager::HasError(media) ) |
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277 |
{ |
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// Item has one or more errors on its attributes |
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// Check if we are going to try to add an attribute that may have an error on it |
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for (TInt count = 0; (count < attributeCount) && (KErrNone == aError); ++count) |
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281 |
{ |
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aError = GlxErrorManager::HasAttributeErrorL(media, iAttributes[count]); |
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} |
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} |
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285 |
|
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// Always allow attribute adding if it's the first item |
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if ( KErrNone == aError || aFirstItem ) |
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288 |
{ |
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// There may be some attributes for this item |
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// Add attributes that don't exist yet |
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for (TInt count = 0; count < attributeCount; ++count) |
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292 |
{ |
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const TMPXAttribute& attribute = iAttributes[count]; |
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if (!media->IsSupported(attribute)) |
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295 |
{ |
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if ( KErrNone == GlxErrorManager::HasAttributeErrorL(media, iAttributes[count]) ) |
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297 |
{ |
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AddItemAttributeL(aAttributes, attribute); |
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attributesAdded = ETrue; |
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} |
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301 |
} |
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302 |
} |
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303 |
} |
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304 |
} |
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305 |
} |
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306 |
|
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return attributesAdded; |
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308 |
} |
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|
309 |
|
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310 |
// ----------------------------------------------------------------------------- |
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311 |
// Add attribute to array, no duplicates |
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312 |
// ----------------------------------------------------------------------------- |
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void CGlxAttributeContext::AddItemAttributeL(RArray<TMPXAttribute>& aAttributes, |
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const TMPXAttribute& aAttribute) const |
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{ |
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TRACER("CGlxAttributeContext::AddItemAttributeL"); |
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TIdentityRelation<TMPXAttribute> match(&TMPXAttribute::Match); |
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TInt index = aAttributes.Find(aAttribute, match); |
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if (index == KErrNotFound) |
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{ |
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aAttributes.AppendL(aAttribute); |
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} |
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} |
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// ----------------------------------------------------------------------------- |
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// ----------------------------------------------------------------------------- |
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// CGlxDefaultAttributeContext |
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// ----------------------------------------------------------------------------- |
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// ----------------------------------------------------------------------------- |
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// |
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// NewL |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CGlxDefaultAttributeContext* CGlxDefaultAttributeContext::NewL() |
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{ |
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TRACER("CGlxDefaultAttributeContext::NewL"); |
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CGlxDefaultAttributeContext* obj = new (ELeave) CGlxDefaultAttributeContext(); |
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return obj; |
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} |
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// ----------------------------------------------------------------------------- |
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// Constructor |
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// Sets the iterator of base class to be TGlxFromFocusOutwardIterator |
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// ----------------------------------------------------------------------------- |
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// |
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CGlxDefaultAttributeContext::CGlxDefaultAttributeContext() : |
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CGlxAttributeContext(&iFromFocusIterator) |
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{ |
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} |
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// ----------------------------------------------------------------------------- |
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// Destructor |
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// ----------------------------------------------------------------------------- |
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// |
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EXPORT_C CGlxDefaultAttributeContext::~CGlxDefaultAttributeContext() |
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{ |
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TRACER("CGlxDefaultAttributeContext::Destructor"); |
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} |
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// ---------------------------------------------------------------------------- |
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// Set range offsets |
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// ---------------------------------------------------------------------------- |
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// |
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EXPORT_C void CGlxDefaultAttributeContext::SetRangeOffsets(TInt aFrontOffset, TInt aRearOffset) |
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{ |
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TRACER("CGlxDefaultAttributeContext::SetRangeOffsets"); |
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iFromFocusIterator.SetRangeOffsets(aRearOffset, aFrontOffset); |
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} |