add in-game chat & update gui post-runnables timing & fix panel elements removal

res/layouts/console.xml.lua

@@ -134,6 +134,10 @@ function add_to_history(text)
 end
 
 function submit(text)
+    if #text == 0 then
+        document.prompt.focused = true
+        return
+    end
     text = text:trim()
     add_to_history(text)
 
@@ -204,4 +208,11 @@ function on_open(mode)
     elseif mode then
         modes:set(mode)
     end
+    hud.close("core:ingame_chat")
+end
+
+function on_close()
+    time.post_runnable(function()
+        hud.open_permanent("core:ingame_chat")
+    end)
 end

res/layouts/ingame_chat.xml

@@ -0,0 +1,8 @@
+<panel size="300,0" margin="0,0,0,70" max-length='300' min-length='0'
+       size-func="gui.get_viewport()[1]/2,-1"
+       padding="0"
+       min-size="0"
+       color="0"
+       interval="0"
+       gravity="bottom-left" interactive="false">
+</panel>

res/layouts/ingame_chat.xml.lua

@@ -0,0 +1,59 @@
+local lines = {}
+local dead_lines = {}
+local nextid = 0
+local timeout = 7
+local fadeout = 1
+local initialized = false
+local max_lines = 15
+local animation_fps = 30
+
+local function remove_line(line)
+    document[line[1]]:destruct()
+    time.post_runnable(function() document.root:reposition() end)
+end
+
+local function update_line(line, uptime)
+    local diff = uptime - line[2]
+    if diff > timeout then
+        remove_line(line)
+        table.insert(dead_lines, i)
+    elseif diff > timeout-fadeout then
+        local opacity = (timeout - diff) / fadeout
+        document[line[1]].color = {0, 0, 0, opacity * 80}
+        document[line[1].."L"].color = {255, 255, 255, opacity * 255}
+    end
+end
+
+events.on("core:chat", function(message)
+    local current_time = time.uptime()
+    local id = 'l'..tostring(nextid)
+    document.root:add(gui.template("chat_line", {id=id}))
+    document.root:reposition()
+    document[id.."L"].text = message
+    nextid = nextid + 1
+    if #lines == max_lines then
+        remove_line(lines[1])
+        table.remove(lines, 1)
+    end
+    table.insert(lines, {id, current_time})
+end)
+
+function on_open()
+    if not initialized then
+        initialized = true
+        
+        document.root:setInterval(1/animation_fps, function ()
+            local uptime = time.uptime()
+            for _, line in ipairs(lines) do
+                update_line(line, uptime)
+            end
+            if #dead_lines > 0 then
+                for i = #dead_lines, 1, -1 do
+                    local index = dead_lines[i]
+                    table.remove(lines, i)
+                end
+                dead_lines = {}
+            end
+        end)
+    end
+end

res/layouts/templates/chat_line.xml

@@ -0,0 +1,3 @@
+<container id='%{id}' color="#00000050" size="-1,20">
+    <label pos='5' id='%{id}L' markup='md'/>
+</container>

res/modules/internal/gui_util.lua

@@ -95,7 +95,7 @@ function RadioGroup:__call(elements, onset, default)
         elements=elements, 
         callback=onset, 
         current=nil
-    }, {__index=RadioGroup})
+    }, {__index=self})
     group:set(default)
     return group
 end

res/scripts/stdlib.lua

@@ -351,6 +351,7 @@ function __vc_on_hud_open()
             hud.pause()
         end
     end)
+    hud.open_permanent("core:ingame_chat")
 end
 
 local RULES_FILE = "world:rules.toml"

src/engine/Engine.cpp

@@ -217,6 +217,7 @@ void Engine::renderFrame() {
     Viewport viewport(Window::width, Window::height);
     DrawContext ctx(nullptr, viewport, nullptr);
     gui->draw(ctx, *assets);
+    gui->postAct();
 }
 
 void Engine::saveSettings() {

src/graphics/ui/GUI.cpp

@@ -178,12 +178,6 @@ void GUI::actFocused() {
 }
 
 void GUI::act(float delta, const Viewport& vp) {
-    while (!postRunnables.empty()) {
-        runnable callback = postRunnables.back();
-        postRunnables.pop();
-        callback();
-    }
-
     container->setSize(vp.size());
     container->act(delta);
     auto prevfocus = focus;
@@ -206,6 +200,14 @@ void GUI::act(float delta, const Viewport& vp) {
     }
 }
 
+void GUI::postAct() {
+    while (!postRunnables.empty()) {
+        runnable callback = postRunnables.back();
+        postRunnables.pop();
+        callback();
+    }
+}
+
 void GUI::draw(const DrawContext& pctx, const Assets& assets) {
     auto ctx = pctx.sub(batch2D.get());
 

src/graphics/ui/GUI.hpp

@@ -106,6 +106,8 @@ namespace gui {
         /// @param assets active assets storage
         void draw(const DrawContext& pctx, const Assets& assets);
 
+        void postAct();
+
         /// @brief Add element to the main container
         /// @param node UI element
         void add(std::shared_ptr<UINode> node);

src/graphics/ui/elements/Panel.cpp

@@ -62,6 +62,11 @@ void Panel::add(const std::shared_ptr<UINode> &node) {
     fullRefresh();
 }
 
+void Panel::remove(const std::shared_ptr<UINode> &node) {
+    Container::remove(node);
+    fullRefresh();
+}
+
 void Panel::refresh() {
     UINode::refresh();
     std::stable_sort(nodes.begin(), nodes.end(), [](auto a, auto b) {

src/graphics/ui/elements/Panel.hpp

@@ -25,6 +25,7 @@ namespace gui {
         Orientation getOrientation() const;
 
         virtual void add(const std::shared_ptr<UINode>& node) override;
+        virtual void remove(const std::shared_ptr<UINode>& node) override;
 
         virtual void refresh() override;
         virtual void fullRefresh() override;