StateManager => Configuration.

git-svn-id: http://svn.drobilla.net/lad/trunk/patchage@5348 a436a847-0d15-0410-975c-d299462d15a1

1 files changed, 290 insertions, 0 deletions

diff --git a/src/Configuration.cpp b/src/Configuration.cpp
new file mode 100644
index 0000000..ae621cb
--- /dev/null
+++ b/src/Configuration.cpp
@@ -0,0 +1,290 @@
+/* This file is part of Patchage.
+ * Copyright 2007-2013 David Robillard <http://drobilla.net>
+ *
+ * Patchage 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 3 of the License, or (at your option)
+ * any later version.
+ *
+ * Patchage 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 details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Patchage.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+
+#include <fstream>
+#include <iostream>
+#include <limits>
+#include <stdexcept>
+#include <vector>
+
+#include "Configuration.hpp"
+#include "Patchage.hpp"
+
+Configuration::Configuration()
+	: _window_location(0, 0)
+	, _window_size(640, 480)
+	, _zoom(1.0)
+{
+}
+
+bool
+Configuration::get_module_location(const std::string& name, ModuleType type, Coord& loc)
+{
+	std::map<std::string, ModuleSettings>::const_iterator i = _module_settings.find(name);
+	if (i == _module_settings.end()) {
+		return false;
+	}
+
+	const ModuleSettings& settings = (*i).second;
+	if (type == Input && settings.input_location) {
+		loc = *settings.input_location;
+	} else if (type == Output && settings.output_location) {
+		loc = *settings.output_location;
+	} else if (type == InputOutput && settings.inout_location) {
+		loc = *settings.inout_location;
+	} else {
+		return false;
+	}
+
+	return true;
+}
+
+void
+Configuration::set_module_location(const std::string& name, ModuleType type, Coord loc)
+{
+	std::map<std::string, ModuleSettings>::iterator i = _module_settings.find(name);
+	if (i == _module_settings.end()) {
+		i = _module_settings.insert(
+			std::make_pair(name, ModuleSettings(type != InputOutput))).first;
+	}
+
+	ModuleSettings& settings = (*i).second;
+	switch (type) {
+	case Input:
+		settings.input_location = loc;
+		break;
+	case Output:
+		settings.output_location = loc;
+		break;
+	case InputOutput:
+		settings.inout_location = loc;
+		break;
+	default:
+		break;  // shouldn't reach here
+	}
+}
+
+/** Returns whether or not this module should be split.
+ *
+ * If nothing is known about the given module, @a default_val is returned (this is
+ * to allow driver's to request terminal ports get split by default).
+ */
+bool
+Configuration::get_module_split(const std::string& name, bool default_val) const
+{
+	std::map<std::string, ModuleSettings>::const_iterator i = _module_settings.find(name);
+	if (i == _module_settings.end()) {
+		return default_val;
+	}
+
+	return (*i).second.split;
+}
+
+void
+Configuration::set_module_split(const std::string& name, bool split)
+{
+	_module_settings[name].split = split;
+}
+
+/** Return a vector of filenames in descending order by preference. */
+static std::vector<std::string>
+get_filenames()
+{
+	std::vector<std::string> filenames;
+	std::string prefix;
+
+	const char* xdg_config_home = getenv("XDG_CONFIG_HOME");
+	const char* home            = getenv("HOME");
+
+	// XDG spec
+	if (xdg_config_home) {
+		filenames.push_back(std::string(xdg_config_home) + "/patchagerc");
+	} else if (home) {
+		filenames.push_back(std::string(home) + "/.config/patchagerc");
+	}
+
+	// Old location
+	if (home) {
+		filenames.push_back(std::string(home) + "/.patchagerc");
+	}
+
+	// Current directory (bundle or last-ditch effort)
+	filenames.push_back("patchagerc");
+
+	return filenames;
+}
+
+void
+Configuration::load()
+{
+	// Try to find a readable configuration file
+	const std::vector<std::string> filenames = get_filenames();
+	std::ifstream                  file;
+	for (size_t i = 0; i < filenames.size(); ++i) {
+		file.open(filenames[i].c_str(), std::ios::in);
+		if (file.good()) {
+			std::cout << "Loading configuration from " << filenames[i] << std::endl;
+			break;
+		}
+	}
+
+	if (!file.good()) {
+		std::cout << "No configuration file present" << std::endl;
+		return;
+	}
+
+	_module_settings.clear();
+	while (file.good()) {
+		std::string key;
+		if (file.peek() == '\"') {
+			/* Old versions ommitted the module_position key and listed
+			   positions starting with module name in quotes. */
+			key = "module_position";
+		} else {
+			file >> key;
+		}
+
+		if (key == "window_location") {
+			file >> _window_location.x >> _window_location.y;
+		} else if (key == "window_size") {
+			file >> _window_size.x >> _window_size.y;
+		} else if (key == "zoom_level") {
+			file >> _zoom;
+		} else if (key == "module_position" || key[0] == '\"') {
+
+			Coord       loc;
+			std::string name;
+			file.ignore(1, '\"');
+			std::getline(file, name, '\"');
+
+			ModuleType  type;
+			std::string type_str;
+			file >> type_str;
+			if (type_str == "input") {
+				type = Input;
+			} else if (type_str == "output") {
+				type = Output;
+			} else if (type_str == "inputoutput") {
+				type = InputOutput;
+			} else {
+				std::cerr << "error: bad position type `" << type_str
+				          << "' for module `" << name << "'" << std::endl;
+				file.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+				continue;
+			}
+
+			file >> loc.x;
+			file >> loc.y;
+
+			set_module_location(name, type, loc);
+		} else {
+			std::cerr << "warning: unknown configuration key `" << key << "'"
+			          << std::endl;
+			file.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+		}
+
+		// Skip trailing whitespace, including newline
+		while (file.good() && isspace(file.peek())) {
+			file.ignore(1);
+		}
+	}
+
+	file.close();
+}
+
+static inline void
+write_module_position(std::ofstream&     os,
+                      const std::string& name,
+                      const char*        type,
+                      const Coord&       loc)
+{
+	os << "module_position \"" << name << "\""
+	   << " " << type << " " << loc.x << " " << loc.y << std::endl;
+}
+
+void
+Configuration::save()
+{
+	// Try to find a writable configuration file
+	const std::vector<std::string> filenames = get_filenames();
+	std::ofstream                  file;
+	for (size_t i = 0; i < filenames.size(); ++i) {
+		file.open(filenames[i].c_str(), std::ios::out);
+		if (file.good()) {
+			std::cout << "Writing configuration to " << filenames[i] << std::endl;
+			break;
+		}
+	}
+
+	if (!file.good()) {
+		std::cout << "Unable to open configuration file to write" << std::endl;
+		return;
+	}
+
+	file << "window_location " << _window_location.x << " " << _window_location.y << std::endl;
+	file << "window_size " << _window_size.x << " " << _window_size.y << std::endl;
+	file << "zoom_level " << _zoom << std::endl;
+
+	for (std::map<std::string, ModuleSettings>::iterator i = _module_settings.begin();
+	     i != _module_settings.end(); ++i) {
+		const ModuleSettings& settings = (*i).second;
+		const std::string&         name     = (*i).first;
+
+		if (settings.split) {
+			if (settings.input_location && settings.output_location) {
+				write_module_position(file, name, "input", *settings.input_location);
+				write_module_position(file, name, "output", *settings.output_location);
+			}
+		} else {
+			if (settings.input_location && settings.inout_location) {
+				write_module_position(file, name, "inputoutput", *settings.inout_location);
+			}
+		}
+	}
+
+	file.close();
+}
+
+float
+Configuration::get_zoom()
+{
+	return _zoom;
+}
+
+void
+Configuration::set_zoom(float zoom)
+{
+	_zoom = zoom;
+}
+
+int
+Configuration::get_port_color(PortType type)
+{
+	// Darkest tango palette colour, with S -= 6, V -= 6, w/ transparency
+
+	if (type == JACK_AUDIO)
+		return 0x244678FF;
+	else if (type == JACK_MIDI)
+		return 0x960909FF;
+	else if (type == ALSA_MIDI)
+		return 0x4A8A0EFF;
+	else
+		return 0xFF0000FF;
+}
+