Update Rich Input with selection/arrows control. Add template and nodes to self:get_druid

druid/base/text.lua

@@ -81,11 +81,10 @@ local const = require("druid.const")
 local helper = require("druid.helper")
 local utf8_lua = require("druid.system.utf8")
 local component = require("druid.component")
-local utf8 = utf8 or utf8_lua
+local utf8 = utf8 or utf8_lua --[[@as utf8]]
 
 local Text = component.create("text")
 
-
 local function update_text_size(self)
 	local size = vmath.vector3(
 		self.start_size.x * (self.start_scale.x / self.scale.x),
@@ -110,13 +109,12 @@ local function is_fit_info_area(self, metrics)
 	return metrics.width * self.scale.x <= self.text_area.x and
 		   metrics.height * self.scale.y <= self.text_area.y
 end
+
+
 --- Setup scale x, but can only be smaller, than start text scale
 local function update_text_area_size(self)
 	reset_default_scale(self)
 
-	local max_width = self.text_area.x
-	local max_height = self.text_area.y
-
 	local metrics = helper.get_text_metrics_from_node(self.node)
 
 	if metrics.width == 0 then
@@ -125,15 +123,56 @@ local function update_text_area_size(self)
 		return
 	end
 
-	local scale_modifier = max_width / metrics.width
-	scale_modifier = math.min(scale_modifier, self.start_scale.x)
+	local text_area_width = self.text_area.x
+	local text_area_height = self.text_area.y
 
+	-- Adjust by width
+	local scale_modifier = text_area_width / metrics.width
+
+	-- Adjust by height
 	if self:is_multiline() then
-		local scale_modifier_by_height = math.sqrt(max_height / metrics.height)
-		scale_modifier = math.min(self.start_scale.y, scale_modifier_by_height)
+		-- Approximate scale by height to start adjust scale
+		scale_modifier = math.sqrt(text_area_height / metrics.height)
+		if metrics.width * scale_modifier > text_area_width then
+			scale_modifier = text_area_width / metrics.width
+		end
 
-		if metrics.width * scale_modifier > max_width then
-			scale_modifier = math.min(max_width / metrics.width, self.start_scale.x)
+		-- #RMME
+		if self._minimal_scale then
+			scale_modifier = math.max(scale_modifier, self._minimal_scale)
+		end
+		-- Limit max scale by initial scale
+		scale_modifier = math.min(scale_modifier, self.start_scale.x)
+		-- #RMME
+
+		local is_fit = is_fit_info_area(self, metrics)
+		local step = is_fit and self.style.ADJUST_SCALE_DELTA or -self.style.ADJUST_SCALE_DELTA
+
+		for i = 1, self.style.ADJUST_STEPS do
+			-- Grow down to check if we fit
+			if step < 0 and is_fit then
+				break
+			end
+			-- Grow up to check if we still fit
+			if step > 0 and not is_fit then
+				break
+			end
+
+			scale_modifier = scale_modifier + step
+
+			if self._minimal_scale then
+				scale_modifier = math.max(scale_modifier, self._minimal_scale)
+			end
+			-- Limit max scale by initial scale
+			scale_modifier = math.min(scale_modifier, self.start_scale.x)
+
+			self.scale.x = scale_modifier
+			self.scale.y = scale_modifier
+			self.scale.z = self.start_scale.z
+			gui.set_scale(self.node, self.scale)
+			update_text_size(self)
+			metrics = helper.get_text_metrics_from_node(self.node)
+			is_fit = is_fit_info_area(self, metrics)
 		end
 	end
 
@@ -141,12 +180,16 @@ local function update_text_area_size(self)
 		scale_modifier = math.max(scale_modifier, self._minimal_scale)
 	end
 
-	local new_scale = vmath.vector3(scale_modifier, scale_modifier, self.start_scale.z)
-	gui.set_scale(self.node, new_scale)
-	self.scale = new_scale
+	-- Limit max scale by initial scale
+	scale_modifier = math.min(scale_modifier, self.start_scale.x)
+
+	self.scale.x = scale_modifier
+	self.scale.y = scale_modifier
+	self.scale.z = self.start_scale.z
+	gui.set_scale(self.node, self.scale)
 	update_text_size(self)
 
-	self.on_update_text_scale:trigger(self:get_context(), new_scale, metrics)
+	self.on_update_text_scale:trigger(self:get_context(), self.scale, metrics)
 end
 
 
@@ -177,18 +220,6 @@ local function update_text_with_anchor_shift(self)
 end
 
 
--- calculate space width with font
-local function get_space_width(self, font)
-	if not self._space_width[font] then
-		local no_space = resource.get_text_metrics(font, "1").width
-		local with_space = resource.get_text_metrics(font, " 1").width
-		self._space_width[font] = with_space - no_space
-	end
-
-	return self._space_width[font]
-end
-
-
 local function update_adjust(self)
 	if not self.adjust_type or self.adjust_type == const.TEXT_ADJUST.NO_ADJUST then
 		reset_default_scale(self)
@@ -224,18 +255,22 @@ end
 -- @table style
 -- @tfield string|nil TRIM_POSTFIX The postfix for TRIM adjust type. Default: ...
 -- @tfield string|nil DEFAULT_ADJUST The default adjust type for any text component. Default: DOWNSCALE
+-- @tfield string|nil ADJUST_STEPS Amount of iterations for text adjust by height. Default: 20
+-- @tfield string|nil ADJUST_SCALE_DELTA Scale step on each height adjust step. Default: 0.02
 function Text.on_style_change(self, style)
 	self.style = {}
 	self.style.TRIM_POSTFIX = style.TRIM_POSTFIX or "..."
 	self.style.DEFAULT_ADJUST = style.DEFAULT_ADJUST or const.TEXT_ADJUST.DOWNSCALE
+	self.style.ADJUST_STEPS = style.ADJUST_STEPS or 20
+	self.style.ADJUST_SCALE_DELTA = style.ADJUST_SCALE_DELTA or 0.02
 end
 
 
 --- The @{Text} constructor
 -- @tparam Text self @{Text}
 -- @tparam string|node node Node name or GUI Text Node itself
--- @tparam string|nil value Initial text. Default value is node text from GUI scene.
--- @tparam string|nil adjust_type Adjust type for text. By default is DOWNSCALE. Look const.TEXT_ADJUST for reference. Default: downscale
+-- @tparam string|nil value Initial text. Default value is node text from GUI scene. Default: nil
+-- @tparam string|nil adjust_type Adjust type for text. By default is DOWNSCALE. Look const.TEXT_ADJUST for reference. Default: DOWNSCALE
 function Text.init(self, node, value, adjust_type)
 	self.node = self:get_node(node)
 	self.pos = gui.get_position(self.node)
@@ -257,8 +292,6 @@ function Text.init(self, node, value, adjust_type)
 	self.on_set_pivot = Event()
 	self.on_update_text_scale = Event()
 
-	self._space_width = {}
-
 	self:set_to(value or gui.get_text(self.node))
 	return self
 end
@@ -282,38 +315,66 @@ end
 
 --- Calculate text width with font with respect to trailing space
 -- @tparam Text self @{Text}
--- @tparam string|nil text
+-- @tparam string text|nil
 -- @treturn number Width
 -- @treturn number Height
 function Text.get_text_size(self, text)
 	text = text or self.last_value
 	local font_name = gui.get_font(self.node)
 	local font = gui.get_font_resource(font_name)
-	local scale = gui.get_scale(self.node)
+	local scale = self.last_scale or gui.get_scale(self.node)
 	local linebreak = gui.get_line_break(self.node)
-	local metrics = resource.get_text_metrics(font, text, {
+	local dot_width = resource.get_text_metrics(font, ".").width
+
+	local metrics = resource.get_text_metrics(font, text .. ".", {
 		line_break = linebreak,
 		leading = 1,
 		tracking = 0,
 		width = self.start_size.x
 	})
-	local width = metrics.width
-	for i = #text, 1, -1 do
-		local c = string.sub(text, i, i)
-		if c ~= ' ' then
+
+	local width = metrics.width - dot_width
+	return width * scale.x, metrics.height * scale.y
+end
+
+
+--- Get chars count by width
+-- @tparam Text self @{Text}
+-- @tparam number width
+-- @treturn number Chars count
+function Text.get_text_index_by_width(self, width)
+	local text = self.last_value
+	local font_name = gui.get_font(self.node)
+	local font = gui.get_font_resource(font_name)
+	local scale = self.last_scale or gui.get_scale(self.node)
+
+	local text_index = 0
+	local text_width = 0
+	local text_length = utf8.len(text)
+	local dot_width = resource.get_text_metrics(font, ".").width
+	local previous_width = 0
+	for i = 1, text_length do
+		local subtext = utf8.sub(text, 1, i) .. "."
+		local subtext_width = resource.get_text_metrics(font, subtext).width
+		subtext_width = subtext_width - dot_width
+		text_width = subtext_width * scale.x
+		local width_delta = text_width - previous_width
+		previous_width = text_width
+
+		if (text_width - width_delta/2) < width then
+			text_index = i
+		else
 			break
 		end
-
-		width = width + get_space_width(self, font)
 	end
 
-	return width * scale.x, metrics.height * scale.y
+	return text_index
 end
 
 
 --- Set text to text field
 -- @tparam Text self @{Text}
--- @tparam string|number|boolean set_to Text for node
+-- @tparam string set_to Text for node
 -- @treturn Text Current text instance
 function Text.set_to(self, set_to)
 	set_to = set_to or ""