Terminal inside Lua window manager

1 files changed, 177 insertions, 0 deletions

diff --git a/src/syslua/lx/gip.lua b/src/syslua/lx/gip.lua
new file mode 100644
index 0000000..8ae06bf
--- /dev/null
+++ b/src/syslua/lx/gip.lua
@@ -0,0 +1,177 @@
+local sys = require 'lx.sys'
+local protodef = require 'lx.protodef'
+local mainloop = require 'lx.mainloop'
+
+local gip = {}
+
+gip.proto = {
+	-- Definitions from proto/gip.h
+	GIPF_DOUBLE_BUFFER = 0x1,
+	GIPF_DAMAGE_NOTIF = 0x2,
+	GIPF_MODESET = 0x4,
+	GIPF_MOUSE_XY = 0x10,
+	GIPF_MOUSE_CURSOR = 0x20,
+
+	GIPC_RESET = 0,
+	GIPR_INITIATE = 1,
+	GIPR_OK = 2,
+	GIPR_FAILURE = 3,
+	GIPC_ENABLE_FEATURES = 4,
+	GIPC_DISABLE_FEATURES = 5,
+
+	GIPN_BUFFER_INFO = 10,
+	GIPC_QUERY_MODE = 11,
+	GIPR_MODE_INFO = 12,
+	GIPC_SET_MODE = 13,
+
+	GIPN_BUFFER_DAMAGE = 14,
+	GIPC_SWITCH_BUFFER = 15,
+
+	GIPN_KEY_DOWN = 20,
+	GIPN_KEY_UP = 21,
+
+	GIPN_MOUSE_DATA = 30,
+	GIPN_MOUSE_XY = 31,
+	GIPN_MOUSE_PRESSED = 32,
+	GIPN_MOUSE_RELEASED = 33,
+
+	gip_msg_header = {
+		fmt = 'LLL',	-- code, req_id, arg
+		len = 12
+	},
+	-- buffer_info_msg = protodef.token .. protodef.fb_info
+	buffer_info_msg = {
+		len = protodef.token.len + protodef.fb_info.len
+	},
+	-- mode_info_msg = protodef.fb_info
+	mode_info_msg = {
+		len = protodef.fb_info.len
+	},
+	-- buffer_damage_msg = protodef.fb_region
+	buffer_damage_msg = {
+		len = protodef.fb_region.len
+	},
+}
+
+gip.new_handler = function(fd)
+	local h = {}
+	h.fd = fd
+
+	-- Replacable callbacks
+	function h:cb_reset(req_id, arg) end
+	function h:cb_initiate(req_id, arg) end
+	function h:cb_ok(req_id, arg) end
+	function h:cb_failure(req_id, arg) end
+	function h:cb_enable_features(req_id, arg) end
+	function h:cb_disable_features(req_id, arg) end
+	function h:cb_query_mode(req_id, arg) end
+	function h:cb_set_mode(req_id, arg) end
+	function h:cb_switch_buffer(req_id, arg) end
+	function h:cb_key_down(req_id, arg) end
+	function h:cb_key_up(req_id, arg) end
+	function h:cb_buffer_info(req_id, arg, token, fb_info) end
+	function h:cb_mode_info(req_id, arg, fb_info) end
+	function h:cb_buffer_damage(req_id, arg, region) end
+	function h:cb_unknown_message(code, req_id, arg) error("Unknown GIP message") end
+	function h:fd_error() error("GIP FD error") end
+
+	h.requests_in_progress = {}
+	h.msg_id = 0
+
+	h.mainloop_fd = mainloop.add_fd(h.fd, function() h:fd_error() end)
+
+	function h:send_msg(code, req_id, arg, data)
+		if req_id == nil then
+			req_id = h.msg_id
+			h.msg_id = h.msg_id + 1
+		end
+
+		local msgdata = string.pack(gip.proto.gip_msg_header.fmt, code, req_id, arg)
+		if code == gip.proto.GIPN_BUFFER_INFO then
+			msgdata = msgdata .. string.pack(protodef.token.fmt, data.tok)
+				  		      .. string.pack(protodef.fb_info.fmt, data.geom.width, data.geom.height,
+							  					data.geom.pitch, data.geom.bpp, data.geom.memory_model)
+		elseif code == gip.proto.GIPN_MODE_INFO then
+			error("Not implemented") --TODO
+		elseif code == gip.proto.GIPN_BUFFER_DAMAGE then
+			error("Not implemented") --TODO
+		end
+			
+		h.mainloop_fd:write(msgdata)
+		return req_id
+	end
+
+	function h:cmd(code, arg, data, cb)
+		local req_id = h:send_msg(code, nil, arg, data)
+		h.requests_in_progress[req_id] = cb
+	end
+
+	function h:got_reply(code, req_id, arg, data)
+		if h.requests_in_progress[req_id] ~= nil then
+			h.requests_in_progress[req_id](code, arg, data)
+			h.requests_in_progress[req_id] = nil
+		end
+	end
+
+	local function gip_handler(ev)
+		local code, req_id, arg = string.unpack(gip.proto.gip_msg_header.fmt, ev)
+
+		if code == gip.proto.GIPC_RESET then
+			h:cb_reset(req_id, arg)
+		elseif code == gip.proto.GIPR_INITIATE then
+			h:cb_initiate(req_id, arg)
+			h:got_reply(code, req_id, arg)
+		elseif code == gip.proto.GIPR_OK then
+			h:cb_ok(req_id, arg)
+			h:got_reply(code, req_id, arg)
+		elseif code == gip.proto.GIPR_FAILURE then
+			h:cb_failure(req_id, arg)
+			h:got_reply(code, req_id, arg)
+		elseif code == gip.proto.GIPC_ENABLE_FEATURE then
+			h:cb_enable_feature(req_id, arg)
+		elseif code == gip.proto.GIPC_DISABLE_FEATURE then
+			h:cb_disable_feature(req_id, arg)
+		elseif code == gip.proto.GIPC_QUERY_MODE then
+			h:cb_query_mode(req_id, arg)
+		elseif code == gip.proto.GIPC_SET_MODE then
+			h:cb_set_mode(req_id, arg)
+		elseif code == gip.proto.GIPC_SWITCH_BUFFER then
+			h:cb_switch_buffer(req_id, arg)
+		elseif code == gip.proto.GIPN_KEY_DOWN then
+			h:cb_key_down(req_id, arg)
+		elseif code == gip.proto.GIPN_KEY_UP then
+			h:cb_key_up(req_id, arg)
+		elseif code == gip.proto.GIPN_BUFFER_INFO then
+			h.mainloop_fd:expect(gip.proto.buffer_info_msg.len, function(msg)
+				local tok, p1 = string.unpack(protodef.token.fmt, msg)
+				local w, h, pitch, bpp, mm = string.unpack(protodef.fb_info.fmt, msg, p1)
+				h:cb_buffer_info(req_id, arg, token, {
+					width = w, height = h,
+					pitch = pitch, bpp = bpp, memory_model = mm })
+			end)
+		elseif code == gip.proto.GIPR_MODE_INFO then
+			h.mainloop_fd:expect(gip.proto.mode_info_msg.len, function(msg)
+				local w, h, pitch, bpp, mm = string.unpack(protodef.fb_info.fmt, msg)
+				local info = {
+					width = w, height = h,
+					pitch = pitch, bpp = bpp, memory_model = mm }
+				h:cb_mode_info(req_id, arg, info)
+				h:got_reply(code, req_id, arg, info)
+			end)
+		elseif code == gip.proto.GIPN_BUFFER_DAMAGE then
+			h.mainloop_fd:expect(gip.proto.buffer_damage_msg.len, function(msg)
+				local rx, ry, rw, rh = string.unpack(protodef.fb_region.fmt, msg)
+				h:cb_buffer_damage(req_id, arg, { x = rx, y = ry, w = rw, h = rh })
+			end)
+		else
+			h:cb_unknown_message(code, req_id, arg)
+		end
+
+		h.mainloop_fd:expect(gip.proto.gip_msg_header.len, gip_handler)
+	end
+	h.mainloop_fd:expect(gip.proto.gip_msg_header.len, gip_handler)
+
+	return h
+end
+
+return gip