1 files changed, 82 insertions, 0 deletions

diff --git a/src/CommandOutput.h b/src/CommandOutput.h
new file mode 100644
index 000000000..bdf675238
--- /dev/null
+++ b/src/CommandOutput.h
@@ -0,0 +1,82 @@
+
+// CommandOutput.h
+
+// Declares various classes that process command output
+
+
+
+
+
+/** Interface for a callback that receives command output
+The Out() function is called for any output the command has produced.
+Descendants override that function to provide specific processing of the output.
+*/
+class cCommandOutputCallback
+{
+public:
+	virtual ~cCommandOutputCallback() {};  // Force a virtual destructor in subclasses
+	
+	/// Syntax sugar function, calls Out() with Printf()-ed parameters; appends a "\n"
+	void Out(const char * a_Fmt, ...);
+	
+	/// Called when the command wants to output anything; may be called multiple times
+	virtual void Out(const AString & a_Text) = 0;
+	
+	/// Called when the command processing has been finished
+	virtual void Finished(void) {};
+} ;
+
+
+
+
+
+/// Class that discards all command output
+class cNullCommandOutputCallback :
+	public cCommandOutputCallback
+{
+	// cCommandOutputCallback overrides:
+	virtual void Out(const AString & a_Text) override
+	{
+		// Do nothing
+	}
+} ;
+
+
+
+
+
+
+/// Sends all command output to a log, line by line, when the command finishes processing
+class cLogCommandOutputCallback :
+	public cCommandOutputCallback
+{
+public:
+	// cCommandOutputCallback overrides:
+	virtual void Out(const AString & a_Text) override;
+	virtual void Finished(void) override;
+	
+protected:
+	/// Output is stored here until the command finishes processing
+	AString m_Buffer;
+} ;
+
+
+
+
+
+/// Sends all command output to a log, line by line; deletes self when command finishes processing
+class cLogCommandDeleteSelfOutputCallback :
+	public cLogCommandOutputCallback
+{
+	typedef cLogCommandOutputCallback super;
+	
+	virtual void Finished(void) override
+	{
+		super::Finished();
+		delete this;
+	}
+} ;
+
+
+
+