Add AIDirPicker and use it. Remove indra/newview/ll{dir,file}picker.{h,cpp}.

Also removed some code from the Mac/windows code in
indra/plugins/filepicker/llfilepicker.cpp that shouldn't
be in there anymore (send_agent_pause/resume and updating
the LLFrameTimer stuff).

indra/newview/statemachine/aidirpicker.h

@@ -0,0 +1,77 @@
+/**
+ * @file aidirpicker.h
+ * @brief Directory picker State machine
+ *
+ * Copyright (c) 2011, Aleric Inglewood.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution.
+ *
+ * CHANGELOG
+ *   and additional copyright holders.
+ *
+ *   10/05/2011
+ *   Initial version, written by Aleric Inglewood @ SL
+ */
+
+#ifndef AIDIRPICKER_H
+#define AIDIRPICKER_H
+
+#include "aifilepicker.h"
+
+// A directory picker state machine.
+//
+// Before calling run(), call open() to pass needed parameters.
+//
+// When the state machine finishes, call hasDirname to check
+// whether or not getDirname will be valid.
+//
+// Objects of this type can be reused multiple times, see
+// also the documentation of AIStateMachine.
+class AIDirPicker : protected AIFilePicker {
+public:
+	// Allow to pass the arguments to open upon creation.
+	//
+	// The starting directory that the user will be in when the directory picker opens
+	// will be the same as the directory used the last time the directory picker was
+	// opened with the same context. If the directory picker was never opened before
+	// with the given context, the starting directory will be set to default_path
+	// unless that is the empty string, in which case it will be equal to the
+	// directory used the last time the file- or dirpicker was opened with context
+	// "openfile".
+	AIDirPicker(std::string const& default_path = "", std::string const& context = "openfile") { open(default_path, context); }
+
+	// This should only be called if you want to re-use the AIDirPicker after it finished
+	// (from the callback function, followed by a call to 'run'). Normally it is not used.
+	void open(std::string const& default_path = "", std::string const& context = "openfile") { AIFilePicker::open(DF_DIRECTORY, default_path, context); }
+
+	bool hasDirname(void) const { return hasFilename(); }
+	std::string const& getDirname(void) const { return getFilename(); }
+
+public:
+	// Basically all public members of AIStateMachine could made accessible here,
+	// but I don't think others will ever be needed (not even these, actually).
+	using AIStateMachine::state_type;
+	using AIFilePicker::isCanceled;
+	using AIStateMachine::run;
+
+protected:
+	// Call finish() (or abort()), not delete.
+	/*virtual*/ ~AIDirPicker() { LL_DEBUGS("Plugin") << "Calling AIDirPicker::~AIDirPicker()" << LL_ENDL; }
+};
+
+#endif