--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/emailuis/nmailui/src/nmeditortextdocument.cpp Mon May 03 12:23:15 2010 +0300
@@ -0,0 +1,107 @@
+/*
+* 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:
+*
+*/
+
+
+#include "nmuiheaders.h"
+
+static const char *NMUI_DOC_DEFAULT_IMAGE = ":/trolltech/styles/commonstyle/images/file-16.png";
+
+/*!
+ \class NmEditorTextDocument
+ \brief Text document with URL image fetching support
+*/
+
+/*!
+ Constructor. Caller needs to ensure manager is valid reference.
+*/
+NmEditorTextDocument::NmEditorTextDocument(QNetworkAccessManager &manager) :
+ mManager(manager)
+{
+ connect(&mManager, SIGNAL(finished(QNetworkReply*)),
+ this, SLOT(replyFinished(QNetworkReply*)));
+}
+
+/*!
+ Destructor
+*/
+NmEditorTextDocument::~NmEditorTextDocument()
+{
+ for(int i = 0; i < mReplyList.count(); i++) {
+ mReplyList.at(i)->abort();
+ mReplyList.at(i)->deleteLater();
+ }
+}
+
+/*!
+ replyFinished. Signaled when the image has been loaded from Internet.
+*/
+void NmEditorTextDocument::replyFinished(QNetworkReply *reply)
+{
+ if(reply->error() == QNetworkReply::NoError) {
+ QPixmap image;
+ if(image.loadFromData(reply->readAll())) {
+ addResource(QTextDocument::ImageResource, reply->url(), QVariant(image));
+ emit documentLayoutChanged();
+ }
+ }
+ mReplyList.removeAll(reply);
+ reply->deleteLater();
+}
+
+/*!
+ loadResource. Starts fetching image from given URL.
+*/
+QVariant NmEditorTextDocument::loadResource(int type, const QUrl &name)
+{
+ QVariant retVal;
+
+ if(type == QTextDocument::ImageResource) {
+ // Load image data from the cache if it exists
+ if(mManager.cache()) {
+ QIODevice *ioDevice = mManager.cache()->data(name);
+ if(ioDevice) {
+ QPixmap image;
+ if(image.loadFromData(ioDevice->readAll())) {
+ addResource(QTextDocument::ImageResource, name, QVariant(image));
+ retVal = QVariant(image);
+ }
+ delete ioDevice;
+ }
+ }
+
+ // Loading from cache failed, try from internet.
+ if(retVal.isNull()) {
+ // Make a request to load the image from Internet. Store the reply
+ // to be able to abort it if necessary.
+ QNetworkRequest request(name);
+ mReplyList.append(mManager.get(request));
+
+ // Load Qt's default image to prevent multiple calls to loadResource.
+ // This function keeps on getting called repeatedly until
+ // resource is added.
+ QPixmap image = QPixmap(QLatin1String(NMUI_DOC_DEFAULT_IMAGE));
+ addResource(QTextDocument::ImageResource, name, QVariant(image));
+ retVal = image;
+ }
+ }
+
+ // Could not find the resource -> try Qt implementation
+ if(retVal.isNull()) {
+ retVal = QTextDocument::loadResource(type, name);
+ }
+ return retVal;
+}