Add eventbuffer type

anselme.lua

@@ -157,7 +157,7 @@ local interpreter_methods = {
 			r, e = eval(self.state, expr)
 		end
 		if not r then coroutine.yield("error", e) end
-		if self.state.interpreter.event_buffer then -- flush final events
+		if self.state.interpreter.current_event then -- flush final events
 			local rf, re = run_line(self.state, { type = "flush_events" })
 			if re then coroutine.yield("error", re) end
 			if rf then r = rf end
@@ -478,15 +478,14 @@ local vm_mt = {
 					coroutine = coroutine.create(function() return "return", interpreter:run(expr, namespace) end),
 					-- status
 					running_line = nil,
-					-- events
-					event_type = nil,
-					event_buffer = nil,
 					-- choice event
 					choice_selected = nil,
 					-- skip next choices until next event change (to skip currently running choice block when resuming from a checkpoint)
 					skip_choices_until_flush = nil,
-					-- captured events stack {[event type]=stack{fn, ...}, ...}
+					-- active event buffer stack
-					event_capture_stack = {},
+					event_buffer_stack = {},
+					-- current event waiting to be sent
+					current_event = nil,
 					-- interrupt
 					interrupt = nil,
 					-- tag stack

interpreter/common.lua

@@ -219,84 +219,95 @@ common = {
 	--- event buffer management
 	-- i.e. only for text and choice events
 	events = {
-		--- add a new element to the event buffer
+		--- add a new element to the last event in the current buffer
-		-- will flush if needed
+		-- will create new event if needed
-		-- returns true in case of success
-		-- returns nil, err in case of error
 		append = function(self, state, type, data)
-			if state.interpreter.event_capture_stack[type] then
+			local buffer = self:current_buffer(state)
-				local r, e = state.interpreter.event_capture_stack[type][#state.interpreter.event_capture_stack[type]](data)
+			local last = buffer[#buffer]
-				if not r then return r, e end
+			if not last or last.type ~= type then
-			else
+				last = { type = type }
-				local r, e = self:make_space_for(state, type)
+				table.insert(buffer, last)
-				if not r then return r, e end
-
-				if not state.interpreter.event_buffer then
-					state.interpreter.event_type = type
-					state.interpreter.event_buffer = {}
-				end
-
-				table.insert(state.interpreter.event_buffer, data)
 			end
-			return true
+			table.insert(last, data)
-		end,
-		--- add a new item in the last element (a list of elements) of the event buffer
-		-- will flush if needed
-		-- will use default or a new list if buffer is empty
-		-- returns true in case of success
-		-- returns nil, err in case of error
-		append_in_last = function(self, state, type, data, default)
-			local r, e = self:make_space_for(state, type)
-			if not r then return r, e end
-
-			if not state.interpreter.event_buffer then
-				r, e = self:append(state, type, default or {})
-				if not r then return r, e end
-			end
-
-			table.insert(state.interpreter.event_buffer[#state.interpreter.event_buffer], data)
-
-			return true
 		end,
 
-		--- start capturing events of a certain type
+		--- new events will be collected in this event buffer (any table) until the next pop
-		-- when an event of the type is appended, fn will be called with this event data
+		-- this is handled by a stack so nesting is allowed
-		-- and the event will not be added to the event buffer
+		push_buffer = function(self, state, buffer)
-		-- fn returns nil, err in case of error
+			table.insert(state.interpreter.event_buffer_stack, buffer)
-		push_capture = function(self, state, type, fn)
-			if not state.interpreter.event_capture_stack[type] then
-				state.interpreter.event_capture_stack[type] = {}
-			end
-			table.insert(state.interpreter.event_capture_stack[type], fn)
 		end,
 		--- stop capturing events of a certain type.
-		-- must be called after a push_capture
+		-- must be called after a push_buffer
-		-- this is handled by a stack so nested capturing is allowed.
+		pop_buffer = function(self, state)
-		pop_capture = function(self, state, type)
+			table.remove(state.interpreter.event_buffer_stack)
-			table.remove(state.interpreter.event_capture_stack[type])
+		end,
-			if #state.interpreter.event_capture_stack[type] == 0 then
+		--- returns the current buffer
-				state.interpreter.event_capture_stack[type] = nil
+		current_buffer = function(self, state)
-			end
+			return state.interpreter.event_buffer_stack[#state.interpreter.event_buffer_stack]
 		end,
 
 		-- flush event buffer if it's neccessary to push an event of the given type
 		-- returns true in case of success
 		-- returns nil, err in case of error
 		make_space_for = function(self, state, type)
-			if state.interpreter.event_buffer and state.interpreter.event_type ~= type and not state.interpreter.event_capture_stack[type] then
+			if #state.interpreter.event_buffer_stack == 0 and state.interpreter.current_event and state.interpreter.current_event.type ~= type then -- FIXME useful?
-				return self:flush(state)
+				return self:manual_flush(state)
 			end
 			return true
 		end,
+
+		--- write all the data in a buffer into the current buffer, or to the game is no buffer is currently set
+		write_buffer = function(self, state, buffer)
+			for _, event in ipairs(buffer) do
+				if #state.interpreter.event_buffer_stack == 0 then
+					if event.type == "flush" then
+						local r, e = self:manual_flush(state)
+						if not r then return r, e end
+					elseif state.interpreter.current_event then
+						if state.interpreter.current_event.type == event.type then
+							for _, v in ipairs(event) do
+								table.insert(state.interpreter.current_event, v)
+							end
+						else
+							local r, e = self:manual_flush(state)
+							if not r then return r, e end
+							state.interpreter.current_event = event
+						end
+					else
+						state.interpreter.current_event = event
+					end
+				else
+					local current_buffer = self:current_buffer(state)
+					table.insert(current_buffer, event)
+				end
+			end
+			return true
+		end,
+
+		--- same as manual_flush but add the flush to the current buffer if one is set instead of directly to the game
+		flush = function(self, state)
+			if #state.interpreter.event_buffer_stack == 0 then
+				return self:manual_flush(state)
+			else
+				local current_buffer = self:current_buffer(state)
+				table.insert(current_buffer, { type = "flush" })
+				return true
+			end
+		end,
+
 		--- flush events and send them to the game if possible
 		-- returns true in case of success
 		-- returns nil, err in case of error
-		flush = function(self, state)
+		manual_flush = function(self, state)
-			while state.interpreter.event_buffer do
+			while state.interpreter.current_event do
-				local type, buffer = state.interpreter.event_type, state.interpreter.event_buffer
+				local event = state.interpreter.current_event
-				state.interpreter.event_type = nil
+				state.interpreter.current_event = nil
-				state.interpreter.event_buffer = nil
+
+				local type, buffer = event.type, event
+				buffer.type = nil
+
 				state.interpreter.skip_choices_until_flush = nil
+
 				-- choice processing
 				local choices
 				if type == "choice" then

interpreter/expression.lua

@@ -23,7 +23,7 @@ local function eval(state, exp)
 		}
 	-- string
 	elseif exp.type == "string" then
-		local t, e = eval_text(state, exp.value)
+		local t, e = eval_text(state, exp.text)
 		if not t then return t, e end
 		return {
 			type = "string",
@@ -32,7 +32,7 @@ local function eval(state, exp)
 	-- parentheses
 	elseif exp.type == "parentheses" then
 		return eval(state, exp.expression)
-	-- list parentheses
+	-- list defined in brackets
 	elseif exp.type == "list_brackets" then
 		if exp.expression then
 			local v, e = eval(state, exp.expression)
@@ -52,7 +52,7 @@ local function eval(state, exp)
 				value = {}
 			}
 		end
-	-- list
+	-- list defined using , operator
 	elseif exp.type == "list" then
 		local flat = flatten_list(exp)
 		local l = {}
@@ -65,17 +65,19 @@ local function eval(state, exp)
 			type = "list",
 			value = l
 		}
-	-- text: only triggered from choice/text lines
+	-- event buffer with from a text line
 	elseif exp.type == "text" then
-		local currentTags = tags:current(state)
+		local l = {}
+		events:push_buffer(state, l)
+		local current_tags = tags:current(state)
 		local v, e = eval_text_callback(state, exp.text, function(text)
-			local v2, e2 = events:append(state, "text", { text = text, tags = currentTags })
+			events:append(state, "text", { text = text, tags = current_tags })
-			if not v2 then return v2, e2 end
 		end)
+		events:pop_buffer(state)
 		if not v then return v, e end
 		return {
-			type = "nil",
+			type = "eventbuffer",
-			value = nil
+			value = l
 		}
 	-- assignment
 	elseif exp.type == ":=" then

interpreter/interpreter.lua

@@ -33,17 +33,38 @@ run_line = function(state, line)
 	elseif line.type == "choice" then
 		local v, e = events:make_space_for(state, "choice")
 		if not v then return v, ("%s; in automatic event flush at %s"):format(e, line.source) end
-		local currentTags = tags:current(state)
-		local choice_block_state = { tags = currentTags, block = line.child }
-		v, e = events:append(state, "choice", { _state = choice_block_state }) -- new choice
-		if not v then return v, e end
-		events:push_capture(state, "text", function(event)
-			local v2, e2 = events:append_in_last(state, "choice", event, { _state = choice_block_state })
-			if not v2 then return v2, e2 end
-		end)
 		v, e = eval(state, line.text)
-		events:pop_capture(state, "text")
 		if not v then return v, ("%s; at %s"):format(e, line.source) end
+		-- convert text events to choices
+		if v.type == "eventbuffer" then
+			local current_tags = tags:current(state)
+			local choice_block_state = { tags = current_tags, block = line.child }
+			local final_buffer = {}
+			for _, event in ipairs(v.value) do
+				if event.type == "text" then
+					-- create new choice block if needed
+					local last_choice_block = final_buffer[#final_buffer]
+					if not last_choice_block or last_choice_block.type ~= "choice" then
+						last_choice_block = { type = "choice" }
+						table.insert(final_buffer, last_choice_block)
+					end
+					-- create new choice item in choice block if needed
+					local last_choice = last_choice_block[#last_choice_block]
+					if not last_choice then
+						last_choice = { _state = choice_block_state }
+						table.insert(last_choice_block, last_choice)
+					end
+					-- add text to last choice item
+					for _, txt in ipairs(event) do
+						table.insert(last_choice, txt)
+					end
+				else
+					table.insert(final_buffer, event)
+				end
+			end
+			v, e = events:write_buffer(state, final_buffer)
+			if not v then return v, ("%s; at %s"):format(e, line.source) end
+		end
 	elseif line.type == "tag" then
 		local v, e = eval(state, line.expression)
 		if not v then return v, ("%s; at %s"):format(e, line.source) end
@@ -61,6 +82,10 @@ run_line = function(state, line)
 		if not v then return v, ("%s; in automatic event flush at %s"):format(e, line.source) end
 		v, e = eval(state, line.text)
 		if not v then return v, ("%s; at %s"):format(e, line.source) end
+		if v.type == "eventbuffer" then
+			v, e = events:write_buffer(state, v.value)
+			if not v then return v, ("%s; at %s"):format(e, line.source) end
+		end
 	elseif line.type == "flush_events" then
 		local v, e = events:flush(state)
 		if not v then return v, ("%s; in event flush at %s"):format(e, line.source) end

parser/common.lua

@@ -135,18 +135,17 @@ common = {
 		return t
 	end,
 	-- parse interpolated expressions in a text
+	-- type sets the type of the returned expression (text is in text field)
 	-- allow_subtext (bool) to enable or not [subtext] support
 	-- if allow_binops is given, if one of the caracters of allow_binops appear unescaped in the text, it will interpreter a binary operator expression
-	-- * returns a text expression, remaining (if the right expression stop before the end of the text)
+	-- * returns an expression with given type (string by default) and as a value a list of strings and expressions (text elements)
-	-- if allow_binops is not given:
+	-- * if allow_binops is given, also returns remaining string (if the right expression stop before the end of the text)
-	-- * returns a list of strings and expressions (text elements)
 	-- * nil, err: in case of error
-	parse_text = function(text, state, namespace, allow_binops, allow_subtext, in_subtext)
+	parse_text = function(text, state, namespace, type, allow_binops, allow_subtext, in_subtext)
 		local l = {}
-		local text_exp
+		local text_exp = { type = type, text = l }
 		local delimiters = ""
 		if allow_binops then
-			text_exp = { type = "text", text = l }
 			delimiters = allow_binops
 		end
 		if allow_subtext then
@@ -182,7 +181,7 @@ common = {
 				text = rem:match("^%s*}(.*)$")
 			-- start subtext
 			elseif allow_subtext and r:match("^%[") then
-				local exp, rem = common.parse_text(r:gsub("^%[", ""), state, namespace, allow_binops, allow_subtext, true)
+				local exp, rem = common.parse_text(r:gsub("^%[", ""), state, namespace, "text", allow_binops, allow_subtext, true)
 				if not exp then return nil, rem end
 				if not rem:match("^%]") then return nil, ("expected closing ] at end of subtext before %q"):format(rem) end
 				-- add to text
@@ -193,7 +192,7 @@ common = {
 				if allow_binops then
 					return text_exp, r
 				else
-					return l
+					return text_exp
 				end
 			-- binop expression at the end of the text
 			elseif allow_binops and r:match(("^[%s]"):format(allow_binops)) then
@@ -209,7 +208,7 @@ common = {
 		if allow_binops then
 			return text_exp, ""
 		else
-			return l
+			return text_exp
 		end
 	end,
 	-- find compatible function variants from a fully qualified name

parser/expression.lua

@@ -29,6 +29,30 @@ local unops_prio = {
 	[11] = {},
 }
 
+local function get_text_in_litteral(s, start_pos)
+	local d, r
+	-- find end of string
+	start_pos = start_pos or 2
+	local i = start_pos
+	while true do
+		local skip
+		skip = s:match("^[^%\\\"]-%b{}()", i) -- skip interpolated expressions
+		if skip then i = skip end
+		skip = s:match("^[^%\\\"]-\\.()", i) -- skip escape codes (need to skip every escape code in order to correctly parse \\": the " is not escaped)
+		if skip then i = skip end
+		if not skip then -- nothing skipped
+			local end_pos = s:match("^[^%\"]-\"()", i) -- search final double quote
+			if end_pos then
+				d, r = s:sub(start_pos, end_pos-2), s:sub(end_pos)
+				break
+			else
+				return nil, ("expected \" to finish string near %q"):format(s:sub(i))
+			end
+		end
+	end
+	return d, r
+end
+
 --- parse an expression
 -- return expr, remaining if success
 -- returns nil, err if error
@@ -48,32 +72,16 @@ local function expression(s, state, namespace, current_priority, operating_on)
 			})
 		-- string
 		elseif s:match("^%\"") then
-			local d, r
+			local d, r = get_text_in_litteral(s)
-			-- find end of string
+			local l, e = parse_text(d, state, namespace, "string") -- parse interpolated expressions
-			local i = 2
-			while true do
-				local skip
-				skip = s:match("^[^%\\\"]-%b{}()", i) -- skip interpolated expressions
-				if skip then i = skip end
-				skip = s:match("^[^%\\\"]-\\.()", i) -- skip escape codes (need to skip every escape code in order to correctly parse \\": the " is not escaped)
-				if skip then i = skip end
-				if not skip then -- nothing skipped
-					local end_pos = s:match("^[^%\"]-\"()", i) -- search final double quote
-					if end_pos then
-						d, r = s:sub(2, end_pos-2), s:sub(end_pos)
-						break
-					else
-						return nil, ("expected \" to finish string near %q"):format(s:sub(i))
-					end
-				end
-			end
-			-- parse interpolated expressions
-			local l, e = parse_text(d, state, namespace)
 			if not l then return l, e end
-			return expression(r, state, namespace, current_priority, {
+			return expression(r, state, namespace, current_priority, l)
-				type = "string",
+		-- text
-				value = l
+		elseif s:match("^t%\"") then
-			})
+			local d, r = get_text_in_litteral(s, 3)
+			local l, e = parse_text(d, state, namespace, "text", nil, true) -- parse interpolated expressions and subtext
+			if not l then return l, e end
+			return expression(r, state, namespace, current_priority, l)
 		-- paranthesis
 		elseif s:match("^%b()") then
 			local content, r = s:match("^(%b())(.*)$")
@@ -119,7 +127,7 @@ local function expression(s, state, namespace, current_priority, operating_on)
 					type = "list",
 					left = {
 						type = "string",
-						value = { name }
+						text = { name }
 					},
 					right = val
 				}

parser/postparser.lua

@@ -57,7 +57,7 @@ local function parse(state)
 		end
 		-- text (text & choice lines)
 		if line.text then
-			local txt, err = parse_text(line.text, state, namespace, "#~", true)
+			local txt, err = parse_text(line.text, state, namespace, "text", "#~", true)
 			if not txt then return nil, ("%s; at %s"):format(err, line.source) end
 			if err:match("[^%s]") then return nil, ("expected end of expression in end-of-text expression before %q"):format(err) end
 			line.text = txt

stdlib/types.lua

@@ -1,4 +1,4 @@
-local format, to_lua, from_lua
+local format, to_lua, from_lua, events, anselme
 
 local types = {}
 types.lua = {
@@ -131,6 +131,13 @@ types.anselme = {
 			return { [k] = v }
 		end
 	},
+	eventbuffer = {
+		format = function(val)
+			local v, e = events:write_buffer(anselme.running.state, val)
+			if not v then return v, e end
+			return ""
+		end,
+	},
 	type = {
 		format = function(val)
 			local k, ke = format(val[1])
@@ -149,6 +156,7 @@ types.anselme = {
 
 package.loaded[...] = types
 local common = require((...):gsub("stdlib%.types$", "interpreter.common"))
-format, to_lua, from_lua = common.format, common.to_lua, common.from_lua
+format, to_lua, from_lua, events = common.format, common.to_lua, common.from_lua, common.events
+anselme = require((...):gsub("stdlib%.types$", "anselme"))
 
 return types

test/tests/eventbuffer text litteral.ans

@@ -0,0 +1,6 @@
+:a = t"Some text."
+:b = t"Tagged text" # 1
+
+a: {a}
+
+b: {b}

test/tests/eventbuffer text litteral.lua

@@ -0,0 +1,32 @@
+local _={}
+_[13]={1}
+_[12]={}
+_[11]={}
+_[10]={}
+_[9]={tags=_[13],text="Tagged text"}
+_[8]={tags=_[12],text="b: "}
+_[7]={tags=_[11],text="Some text."}
+_[6]={tags=_[10],text="a: "}
+_[5]={_[8],_[9]}
+_[4]={_[6],_[7]}
+_[3]={"return"}
+_[2]={"text",_[5]}
+_[1]={"text",_[4]}
+return {_[1],_[2],_[3]}
+--[[
+{ "text", { {
+      tags = {},
+      text = "a: "
+    }, {
+      tags = {},
+      text = "Some text."
+    } } }
+{ "text", { {
+      tags = {},
+      text = "b: "
+    }, {
+      tags = { 1 },
+      text = "Tagged text"
+    } } }
+{ "return" }
+]]--