Chunk updates

data/js/controls.js

@@ -2,6 +2,8 @@ const UI_INITIAL_GUI = 200;
 const UI_RELOAD = 201;
 const UPDATE_OFFSET = 100;
 
+const UI_EXTEND_GUI = 210;
+
 const UI_TITEL = 0;
 
 const UI_PAD = 1;
@@ -230,6 +232,7 @@ function start() {
     var data = JSON.parse(evt.data);
     var e = document.body;
     var center = "";
+
     switch (data.type) {
       case UI_INITIAL_GUI:
         // Clear current elements
@@ -247,6 +250,16 @@ function start() {
           handleEvent(fauxEvent);
         });
         break;
+
+      case UI_EXTEND_GUI:
+        data.controls.forEach(element => {
+          var fauxEvent = {
+            data: JSON.stringify(element),
+          };
+          handleEvent(fauxEvent);
+        });
+        break;
+      
       case UI_RELOAD:
         window.location.reload();
         break;

data/js/controls.min.js

@@ -1,4 +1,4 @@
-const UI_INITIAL_GUI=200;const UI_RELOAD=201;const UPDATE_OFFSET=100;const UI_TITEL=0;const UI_PAD=1;const UPDATE_PAD=101;const UI_CPAD=2;const UPDATE_CPAD=102;const UI_BUTTON=3;const UPDATE_BUTTON=103;const UI_LABEL=4;const UPDATE_LABEL=104;const UI_SWITCHER=5;const UPDATE_SWITCHER=105;const UI_SLIDER=6;const UPDATE_SLIDER=106;const UI_NUMBER=7;const UPDATE_NUMBER=107;const UI_TEXT_INPUT=8;const UPDATE_TEXT_INPUT=108;const UI_GRAPH=9;const ADD_GRAPH_POINT=10;const CLEAR_GRAPH=109;const UI_TAB=11;const UPDATE_TAB=111;const UI_SELECT=12;const UPDATE_SELECT=112;const UI_OPTION=13;const UPDATE_OPTION=113;const UI_MIN=14;const UPDATE_MIN=114;const UI_MAX=15;const UPDATE_MAX=115;const UI_STEP=16;const UPDATE_STEP=116;const UI_GAUGE=17;const UPDATE_GAUGE=117;const UI_ACCEL=18;const UPTDATE_ACCEL=117;const UP=0;const DOWN=1;const LEFT=2;const RIGHT=3;const CENTER=4;const C_TURQUOISE=0;const C_EMERALD=1;const C_PETERRIVER=2;const C_WETASPHALT=3;const C_SUNFLOWER=4;const C_CARROT=5;const C_ALIZARIN=6;const C_DARK=7;const C_NONE=255;var graphData=new Array();var hasAccel=false;var sliderContinuous=false;function colorClass(colorId){colorId=Number(colorId);switch(colorId){case C_TURQUOISE:return"turquoise";case C_EMERALD:return"emerald";case C_PETERRIVER:return"peterriver";case C_WETASPHALT:return"wetasphalt";case C_SUNFLOWER:return"sunflower";case C_CARROT:return"carrot";case C_ALIZARIN:return"alizarin";case C_NONE:return"dark";default:return"";}}
+const UI_INITIAL_GUI=200;const UI_RELOAD=201;const UPDATE_OFFSET=100;const UI_EXTEND_GUI=210;const UI_TITEL=0;const UI_PAD=1;const UPDATE_PAD=101;const UI_CPAD=2;const UPDATE_CPAD=102;const UI_BUTTON=3;const UPDATE_BUTTON=103;const UI_LABEL=4;const UPDATE_LABEL=104;const UI_SWITCHER=5;const UPDATE_SWITCHER=105;const UI_SLIDER=6;const UPDATE_SLIDER=106;const UI_NUMBER=7;const UPDATE_NUMBER=107;const UI_TEXT_INPUT=8;const UPDATE_TEXT_INPUT=108;const UI_GRAPH=9;const ADD_GRAPH_POINT=10;const CLEAR_GRAPH=109;const UI_TAB=11;const UPDATE_TAB=111;const UI_SELECT=12;const UPDATE_SELECT=112;const UI_OPTION=13;const UPDATE_OPTION=113;const UI_MIN=14;const UPDATE_MIN=114;const UI_MAX=15;const UPDATE_MAX=115;const UI_STEP=16;const UPDATE_STEP=116;const UI_GAUGE=17;const UPDATE_GAUGE=117;const UI_ACCEL=18;const UPTDATE_ACCEL=117;const UP=0;const DOWN=1;const LEFT=2;const RIGHT=3;const CENTER=4;const C_TURQUOISE=0;const C_EMERALD=1;const C_PETERRIVER=2;const C_WETASPHALT=3;const C_SUNFLOWER=4;const C_CARROT=5;const C_ALIZARIN=6;const C_DARK=7;const C_NONE=255;var graphData=new Array();var hasAccel=false;var sliderContinuous=false;function colorClass(colorId){colorId=Number(colorId);switch(colorId){case C_TURQUOISE:return"turquoise";case C_EMERALD:return"emerald";case C_PETERRIVER:return"peterriver";case C_WETASPHALT:return"wetasphalt";case C_SUNFLOWER:return"sunflower";case C_CARROT:return"carrot";case C_ALIZARIN:return"alizarin";case C_NONE:return"dark";default:return"";}}
 var websock;var websockConnected=false;function requestOrientationPermission(){}
 function saveGraphData(){localStorage.setItem("espuigraphs",JSON.stringify(graphData));}
 function restoreGraphData(id){var savedData=localStorage.getItem("espuigraphs",graphData);if(savedData!=null){savedData=JSON.parse(savedData);return savedData[id];}
@@ -8,7 +8,7 @@ function conStatusError(){websockConnected=false;$("#conStatus").removeClass("co
 function handleVisibilityChange(){if(!websockConnected&&!document.hidden){restart();}}
 function start(){document.addEventListener("visibilitychange",handleVisibilityChange,false);if(window.location.port!=""||window.location.port!=80||window.location.port!=443){websock=new WebSocket("ws://"+window.location.hostname+":"+window.location.port+"/ws");}else{websock=new WebSocket("ws://"+window.location.hostname+"/ws");}
 websock.onopen=function(evt){console.log("websock open");$("#conStatus").addClass("color-green");$("#conStatus").text("Connected");websockConnected=true;};websock.onclose=function(evt){console.log("websock close");conStatusError();};websock.onerror=function(evt){console.log(evt);conStatusError();};var handleEvent=function(evt){console.log(evt);var data=JSON.parse(evt.data);var e=document.body;var center="";switch(data.type){case UI_INITIAL_GUI:$("#row").html("");$("#tabsnav").html("");$("#tabscontent").html("");if(data.sliderContinuous){sliderContinuous=data.sliderContinuous;}
-data.controls.forEach(element=>{var fauxEvent={data:JSON.stringify(element),};handleEvent(fauxEvent);});break;case UI_RELOAD:window.location.reload();break;case UI_TITEL:document.title=data.label;$("#mainHeader").html(data.label);break;case UI_LABEL:var parent;if(data.parentControl){parent=$("#tab"+data.parentControl);}else{parent=$("#row");}
+data.controls.forEach(element=>{var fauxEvent={data:JSON.stringify(element),};handleEvent(fauxEvent);});break;case UI_EXTEND_GUI:data.controls.forEach(element=>{var fauxEvent={data:JSON.stringify(element),};handleEvent(fauxEvent);});break;case UI_RELOAD:window.location.reload();break;case UI_TITEL:document.title=data.label;$("#mainHeader").html(data.label);break;case UI_LABEL:var parent;if(data.parentControl){parent=$("#tab"+data.parentControl);}else{parent=$("#row");}
 if(data.visible){parent.append("<div id='id"+
 data.id+
 "' class='two columns card tcenter "+

src/ESPUI.cpp

@@ -946,9 +946,8 @@ Initially this function used to send the control element data individually.
 Due to a change in the ESPAsyncWebserver library this had top be changed to be
 sent as one blob at the beginning. Therefore a new type is used as well
 */
-void ESPUIClass::jsonDom(AsyncWebSocketClient* client)
-{
-    String json;
+void ESPUIClass::jsonDom(AsyncWebSocketClient* client) {
+
     DynamicJsonDocument document(jsonInitialDocumentSize);
     document["type"] = (int)UI_INITIAL_GUI;
     document["sliderContinuous"] = sliderContinuous;
@@ -960,9 +959,38 @@ void ESPUIClass::jsonDom(AsyncWebSocketClient* client)
     titleItem["type"] = (int)UI_TITLE;
     titleItem["label"] = ui_title;
 
-    while (control != nullptr)
-    {
-        JsonObject item = items.createNestedObject();
+    while(1) {
+        control = prepareJSONChunk(client, control, &items);
+
+        String json;
+        serializeJson(document, json);
+    #if defined(DEBUG_ESPUI)
+        if (this->verbosity >= Verbosity::VerboseJSON) {
+            Serial.println("Sending elements --------->");
+            Serial.println(json);
+        }
+    #endif
+        if (client != nullptr) client->text(json);
+        else this->ws->textAll(json);
+
+        if(control == nullptr) break;
+
+        document.clear();
+        items.clear();
+        document["type"] = (int) UI_EXTEND_GUI;
+        items = document.createNestedArray("controls");
+    }
+}
+
+
+/* Prepare a chunk of elements as a single JSON string. If the allowed number of elements is greater than the total number
+this will represent the entire UI and this function will return null. If a control pointer is returned then the limit 
+was reached, the currently serialised must be sent, and then processing resumed to send the next chunk. */
+Control *ESPUIClass::prepareJSONChunk(AsyncWebSocketClient* client, Control* control, JsonArray *items) {
+    int elementcount = 0;
+
+    while (control != nullptr && elementcount < 10) {
+        JsonObject item = items->createNestedObject();
 
         item["id"] = String(control->id);
         item["type"] = (int)control->type;
@@ -971,46 +999,25 @@ void ESPUIClass::jsonDom(AsyncWebSocketClient* client)
         item["color"] = (int)control->color;
         item["visible"] = control->visible;
 
-        if (control->parentControl != Control::noParent)
-        {
+        if (control->parentControl != Control::noParent) {
             item["parentControl"] = String(control->parentControl);
         }
 
         // special case for selects: to preselect an option, you have to add
         // "selected" to <option>
-        if (control->type == ControlType::Option)
-        {
-            if (ESPUI.getControl(control->parentControl)->value == control->value)
-            {
+        if (control->type == ControlType::Option) {
+            if (ESPUI.getControl(control->parentControl)->value == control->value) {
                 item["selected"] = "selected";
             }
-            else
-            {
+            else {
                 item["selected"] = "";
             }
         }
 
         control = control->next;
+        elementcount++;
     }
-
-    // Send as one big bunch
-    serializeJson(document, json);
-
-#if defined(DEBUG_ESPUI)
-    if (this->verbosity >= Verbosity::VerboseJSON)
-    {
-        Serial.println(json);
-    }
-#endif
-
-    if (client != nullptr)
-    {
-        client->text(json);
-    }
-    else
-    {
-        this->ws->textAll(json);
-    }
+    return control;
 }
 
 void ESPUIClass::jsonReload()

src/ESPUI.h

@@ -77,11 +77,13 @@ enum ControlType : uint8_t
     UpdateAccel,
 
     InitialGui = 200,
-    Reload = 201
+    Reload = 201,
+    ExtendGUI = 210
 };
 
 #define UI_INITIAL_GUI ControlType::InitialGui
 #define UI_RELOAD ControlType::Reload
+#define UI_EXTEND_GUI ControlType::ExtendGUI
 
 #define UI_TITLE ControlType::Title
 #define UI_LABEL ControlType::Label
@@ -294,6 +296,8 @@ private:
     const char* basicAuthUsername = nullptr;
     const char* basicAuthPassword = nullptr;
     bool basicAuth = true;
+
+    Control *prepareJSONChunk(AsyncWebSocketClient* client, Control *control, JsonArray *items);
 };
 
 extern ESPUIClass ESPUI;