Reimplement click-to-pay links. Add OSX support.

Switch to using Qt's QLocalServer/QLocalSocket to handle bitcoin
payment links (bitcoin:... URIs)

Reason for switch: the boost::interprocess mechanism seemed flaky,
and doesn't mesh as well with "The Qt Way"

qtipcserver.cpp/h is replaced by paymentserver.cpp/h

Click-to-pay now also works on OSX, with a custom Info.plist
that registers Bitcoin-Qt as a handler for bitcoin: URLs and
an event listener on the main QApplication that handles
QFileOpenEvents (Qt translates 'url clicked' AppleEvents into
QFileOpenEvents automagically).

1 files changed, 66 insertions, 0 deletions

diff --git a/src/qt/paymentserver.h b/src/qt/paymentserver.h
new file mode 100644
index 0000000000..cfc48afb38
--- /dev/null
+++ b/src/qt/paymentserver.h
@@ -0,0 +1,66 @@
+#ifndef PAYMENTSERVER_H
+#define PAYMENTSERVER_H
+
+//
+// This class handles payment requests from clicking on
+// bitcoin: URIs
+//
+// This is somewhat tricky, because we have to deal with
+// the situation where the user clicks on a link during
+// startup/initialization, when the splash-screen is up
+// but the main window (and the Send Coins tab) is not.
+//
+// So, the strategy is:
+//
+// Create the server, and register the event handler,
+// when the application is created. Save any URIs
+// received at or during startup in a list.
+//
+// When startup is finished and the main window is
+// show, a signal is sent to slot uiReady(), which
+// emits a receivedURL() signal for any payment
+// requests that happened during startup.
+//
+// After startup, receivedURL() happens as usual.
+//
+// This class has one more feature: a static
+// method that finds URIs passed in the command line
+// and, if a server is running in another process,
+// sends them to the server.
+//
+#include <QObject>
+#include <QString>
+
+class QApplication;
+class QLocalServer;
+
+class PaymentServer : public QObject
+{
+    Q_OBJECT
+private:
+    bool saveURIs;
+    QLocalServer* uriServer;
+
+public:
+    // Returns true if there were URIs on the command line
+    // which were successfully sent to an already-running
+    // process.
+    static bool ipcSendCommandLine();
+
+    PaymentServer(QApplication* parent);
+
+    bool eventFilter(QObject *object, QEvent *event);
+
+signals:
+    void receivedURI(QString);
+
+public slots:
+    // Signal this when the main window's UI is ready
+    // to display payment requests to the user
+    void uiReady();
+
+private slots:
+    void handleURIConnection();
+};
+
+#endif // PAYMENTSERVER_H