Added "Open URL" action.

It was implemented in CodepasterPlugin because it provides facility
to fetch files from network into editor with proper error reporting.

Change-Id: I1ea7f1799dfa3ca8423a06a64b43b419f23046eb
Reviewed-by: Tobias Hunger <tobias.hunger@nokia.com>

src/plugins/cpaster/urlopenprotocol.cpp

@@ -0,0 +1,50 @@
+#include "urlopenprotocol.h"
+
+#include <utils/qtcassert.h>
+
+#include <QFileInfo>
+#include <QNetworkReply>
+
+using namespace CodePaster;
+
+UrlOpenProtocol::UrlOpenProtocol(const NetworkAccessManagerProxyPtr &nw)
+    : NetworkProtocol(nw), m_fetchReply(0)
+{
+}
+
+QString UrlOpenProtocol::name() const
+{
+    return QLatin1String("Open URL"); // unused
+}
+
+unsigned UrlOpenProtocol::capabilities() const
+{
+    return 0;
+}
+
+void UrlOpenProtocol::fetch(const QString &url)
+{
+    QTC_ASSERT(!m_fetchReply, return);
+    m_fetchReply = httpGet(url);
+    connect(m_fetchReply, SIGNAL(finished()), this, SLOT(fetchFinished()));
+}
+
+void UrlOpenProtocol::fetchFinished()
+{
+    const QString title = m_fetchReply->url().toString();
+    QString content;
+    const bool error = m_fetchReply->error();
+    if (error) {
+        content = m_fetchReply->errorString();
+    } else {
+        content = QString::fromUtf8(m_fetchReply->readAll());
+    }
+    m_fetchReply->deleteLater();
+    m_fetchReply = 0;
+    emit fetchDone(title, content, error);
+}
+
+void UrlOpenProtocol::paste(const QString &, ContentType, const QString &,
+                            const QString &, const QString &)
+{
+}