From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 19 Nov 2022 22:05:12 +0000 (+0200)
Subject: Add classes for storing and applying bindings to controls
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=7302a06;p=libs%2Fgui.git

Add classes for storing and applying bindings to controls
---

diff --git a/source/input/bindings.cpp b/source/input/bindings.cpp
new file mode 100644
index 0000000..85b5941
--- /dev/null
+++ b/source/input/bindings.cpp
@@ -0,0 +1,142 @@
+#include <msp/strings/format.h>
+#include "bindings.h"
+#include "controlscheme.h"
+
+using namespace std;
+
+namespace Msp {
+namespace Input {
+
+vector<Device *> Bindings::resolve_devices(Device &dev) const
+{
+	vector<Device *> resolved_devs;
+	resolved_devs.reserve(devices.size());
+	for(vector<DeviceRef>::const_iterator i=devices.begin(); i!=devices.end(); ++i)
+	{
+		if(i->type!=UNSPECIFIED)
+			resolved_devs.push_back(dev.find_subdevice(i->type));
+		else if(!i->name.empty())
+			resolved_devs.push_back(dev.find_subdevice(i->name));
+		else
+			resolved_devs.push_back(0);
+	}
+	return resolved_devs;
+}
+
+bool Bindings::is_compatible(Device &dev) const
+{
+	vector<Device *> resolved_devs = resolve_devices(dev);
+	for(vector<Device *>::const_iterator i=resolved_devs.begin(); i!=resolved_devs.end(); ++i)
+		if(!*i)
+			return false;
+	return true;
+}
+
+bool Bindings::apply_to(ControlScheme &control_scheme, Device &dev)
+{
+	vector<Device *> resolved_devs = resolve_devices(dev);
+	bool applied = false;
+	for(vector<Binding>::const_iterator i=bindings.begin(); i!=bindings.end(); ++i)
+	{
+		Control *ctrl = control_scheme.find(i->control);
+		Device *bdev = (i->device<resolved_devs.size() ? resolved_devs[i->device] : 0);
+		if(ctrl && bdev)
+		{
+			ctrl->set_source(*bdev, i->type, i->index);
+			applied = true;
+		}
+	}
+
+	return applied;
+}
+
+
+DataFile::Loader::ActionMap Bindings::Loader::shared_actions;
+
+Bindings::Loader::Loader(Bindings &b):
+	ObjectLoader<Bindings>(b)
+{
+	set_actions(shared_actions);
+}
+
+void Bindings::Loader::init_actions()
+{
+	add("binding", &Loader::binding);
+	add("device", &Loader::device_type);
+	add("device", &Loader::device_name);
+}
+
+void Bindings::Loader::binding(const string &c)
+{
+	Binding bind;
+	bind.control = c;
+	load_sub(bind);
+	obj.bindings.push_back(bind);
+}
+
+void Bindings::Loader::device_type(DeviceType t)
+{
+	DeviceRef dev;
+	dev.type = t;
+	obj.devices.push_back(dev);
+}
+
+void Bindings::Loader::device_name(const string &n)
+{
+	DeviceRef dev;
+	dev.name = n;
+	obj.devices.push_back(dev);
+}
+
+
+DataFile::Loader::ActionMap Bindings::Binding::Loader::shared_actions;
+
+Bindings::Binding::Loader::Loader(Binding &b):
+	ObjectLoader<Binding>(b)
+{
+	set_actions(shared_actions);
+}
+
+void Bindings::Binding::Loader::init_actions()
+{
+	add("axis", &Loader::axis);
+	add("button", &Loader::button);
+	add("device", &Binding::device);
+	add("key", &Loader::key);
+}
+
+void Bindings::Binding::Loader::axis(unsigned a, AxisSide s)
+{
+	obj.type = (s==NEGATIVE ? AXIS_NEG : AXIS_POS);
+	obj.index = a;
+}
+
+void Bindings::Binding::Loader::button(unsigned b)
+{
+	obj.type = BUTTON;
+	obj.index = b;
+}
+
+
+void operator>>(const LexicalConverter &conv, Bindings::AxisSide &side)
+{
+	if(conv.get()=="POSITIVE")
+		side = Bindings::POSITIVE;
+	else if(conv.get()=="NEGATIVE")
+		side = Bindings::NEGATIVE;
+	else
+		throw lexical_error(format("conversion of '%s' to AxisSide", conv.get()));
+}
+
+void operator<<(LexicalConverter &conv, Bindings::AxisSide side)
+{
+	switch(side)
+	{
+	case Bindings::POSITIVE: conv.result("POSITIVE"); break;
+	case Bindings::NEGATIVE: conv.result("NEGATIVE"); break;
+	default: conv.result(format("AxisSide(%#x)", static_cast<int>(side)));
+	}
+}
+
+} // namespace Input
+} // namespace Msp;
diff --git a/source/input/bindings.h b/source/input/bindings.h
new file mode 100644
index 0000000..b73dc51
--- /dev/null
+++ b/source/input/bindings.h
@@ -0,0 +1,91 @@
+#ifndef MSP_INPUT_BINDINGS_H_
+#define MSP_INPUT_BINDINGS_H_
+
+#include <msp/datafile/objectloader.h>
+#include <msp/strings/lexicalcast.h>
+#include "control.h"
+#include "device.h"
+#include "keys.h"
+
+namespace Msp {
+namespace Input {
+
+class ControlScheme;
+
+class Bindings
+{
+public:
+	class Loader: public DataFile::ObjectLoader<Bindings>
+	{
+	private:
+		static ActionMap shared_actions;
+
+	public:
+		Loader(Bindings &);
+
+	private:
+		virtual void init_actions();
+
+		void binding(const std::string &);
+		void device_type(DeviceType);
+		void device_name(const std::string &);
+	};
+
+	struct DeviceRef
+	{
+		DeviceType type = UNSPECIFIED;
+		std::string name;
+	};
+
+private:
+	enum AxisSide
+	{
+		POSITIVE,
+		NEGATIVE
+	};
+
+	friend void operator>>(const LexicalConverter &, AxisSide &);
+	friend void operator<<(LexicalConverter &, AxisSide);
+
+public:
+	struct Binding
+	{
+		class Loader: public DataFile::ObjectLoader<Binding>
+		{
+		private:
+			static ActionMap shared_actions;
+
+		public:
+			Loader(Binding &);
+
+		private:
+			virtual void init_actions();
+
+			void axis(unsigned, AxisSide);
+			void button(unsigned);
+			void key(Key k) { button(k); }
+		};
+
+		std::string control;
+		unsigned device;
+		ControlSrcType type;
+		unsigned index;
+	};
+
+private:
+	std::vector<DeviceRef> devices;
+	std::vector<Binding> bindings;
+
+public:
+	const std::vector<DeviceRef> &get_devices() const { return devices; }
+	std::vector<Device *> resolve_devices(Device &) const;
+	bool is_compatible(Device &) const;
+	const std::vector<Binding> &get_bindings() const { return bindings; }
+
+	bool apply_to(ControlScheme &, Device &);
+};
+
+} // namespace Input
+} // namespace Msp
+
+#endif
diff --git a/source/input/controlscheme.cpp b/source/input/controlscheme.cpp
new file mode 100644
index 0000000..fe1c0eb
--- /dev/null
+++ b/source/input/controlscheme.cpp
@@ -0,0 +1,33 @@
+#include <msp/core/maputils.h>
+#include "control.h"
+#include "controlscheme.h"
+
+using namespace std;
+
+namespace Msp {
+namespace Input {
+
+void ControlScheme::add(const string &name, Control &ctrl)
+{
+	insert_unique(controls, name, &ctrl);
+}
+
+Control &ControlScheme::get(const string &name) const
+{
+	return *get_item(controls, name);
+}
+
+Control *ControlScheme::find(const string &name) const
+{
+	map<string, Control *>::const_iterator i = controls.find(name);
+	return (i!=controls.end() ? i->second : 0);
+}
+
+void ControlScheme::reset_edges()
+{
+	for(map<string, Control *>::const_iterator i=controls.begin(); i!=controls.end(); ++i)
+		i->second->reset_edges();
+}
+
+} // namespace Input
+} // namespace Msp
diff --git a/source/input/controlscheme.h b/source/input/controlscheme.h
new file mode 100644
index 0000000..dabcec2
--- /dev/null
+++ b/source/input/controlscheme.h
@@ -0,0 +1,32 @@
+#ifndef MSP_INPUT_CONTROLSCHEME_H_
+#define MSP_INPUT_CONTROLSCHEME_H_
+
+#include <map>
+#include <string>
+
+namespace Msp {
+namespace Input {
+
+class Control;
+
+class ControlScheme
+{
+private:
+	std::map<std::string, Control *> controls;
+
+protected:
+	ControlScheme() = default;
+
+	void add(const std::string &, Control &);
+public:
+	Control &get(const std::string &) const;
+	Control *find(const std::string &) const;
+	const std::map<std::string, Control *> &get_controls() const { return controls; }
+
+	void reset_edges();
+};
+
+} // namespace Input
+} // namespace Msp
+
+#endif