working backspace button :)

ime.js

@@ -22,17 +22,15 @@ function imeDown(keyEvent, inputField) {
     switch (keyEvent.key) {
         case "Backspace":
             if (selected == -1) {
-                let latest = input[input.length]
-                console.log(latest);
-
-
                 if (currentWord.join("") == "") {
                     currentWord = input.pop() || [];
                 } else {
-                    currentWord.pop();
+                    imeRestore(currentWord);
+                    // currentWord.pop();
                 }
             } else {
-                input[selected].pop();
+                imeRestore(input[selected]);
+                // input[selected].pop();
                 if (input[selected].join("") == "") {
                     input.splice(selected,1);
                     imeMove("left");
@@ -190,8 +188,17 @@ function getUnicodeConsonant(consonant, scv) {
     return String.fromCharCode(parseInt("E" + hConsonants[consonant] + "" + scv, 16));
 }
 
+function inverse(obj){
+    var retobj = {};
+    for(var key in obj){
+        retobj[obj[key]] = key;
+    }
+    return retobj;
+}
+
 let hVowelsK = Object.keys(hVowels)
 let hConsonantsK = Object.keys(hConsonants);
+let hConsonantsR = inverse(hConsonants);
 
 function debugInput(key) {
     console.log("pre "+key+": inputstate - "+inputState +", statestate - "+ stateState);
@@ -207,6 +214,128 @@ function imeReset() {
     inputState = 0;
     inputFull = [];
     inputCurrent = "";
+    if (selected == -1) {
+        currentWord = [];
+    } else {
+        input[selected] = [];
+    }
+    
+}
+
+function imeInfo(decHex) {
+    try {
+        let hex = decHex.codePointAt(0).toString(16);
+        hex[1] = parseInt(hex[1], 16);
+        hex[2] = parseInt(hex[2], 16);
+        hex[3] = parseInt(hex[3], 16);
+        let ka = (hex[1] == 0 && hex[2] == 0) ? "a" : "k";
+        if (ka == "k") {
+            if (hex[3] == 1) {
+                //trailing
+                return([ka,"trailing"])
+            } else if (hex[3] == 0) {
+                //standalone
+                //full reset / no restore necessary
+                return([ka,"standalone"])
+            } else {
+                //composing
+                return([ka,"composing"])
+            }
+        } else {
+            if (hex[3] <= 8) {
+                //standalone
+                return([ka,"standalone"])
+            } else {
+                //trailing
+                return([ka,"trailing"])
+            }
+        }
+    } catch {
+        return "";
+    }
+}
+
+function imeChange(inState, stState, pop, array) {
+    inputState = inState;
+    stateState = stState;
+    if (pop) {
+        array.pop();
+    }
+    inputFull = array;
+}
+
+function imeRestore(array) {
+    let hex = array[array.length-1].codePointAt(0).toString(16);
+    hex[1] = parseInt(hex[1], 16);
+    hex[2] = parseInt(hex[2], 16);
+    hex[3] = parseInt(hex[3], 16);
+    let previous = imeInfo(array[array.length-2])[1];
+    let ka = (hex[1] == 0 && hex[2] == 0) ? "a" : "k";
+    if (ka == "k") {
+        if (hex[3] == 1) {
+            //trailing
+            if (previous == "trailing") {
+                //trailing twice
+                console.log("2.1");
+                imeChange(2,1,true,array);
+            } else {
+                //trailing once
+                console.log("2.0");
+                imeChange(2,0,true,array);
+            }
+        } else if (hex[3] == 0) {
+            console.log(array.length);
+            if (array.length != 1) {
+                //0.1, i think?
+                console.log("0.1");
+                imeChange(0,1,true,array);
+            } else {
+                //standalone
+                console.log("full reset");
+                imeReset();
+            }
+        } else {
+            //composing
+            if (previous == "standalone") {
+                //0.1??
+                //recreate?? last digit???
+                let c = hConsonantsR[[hex[1], hex[2]].join("").toUpperCase()];
+                array.pop();
+                array.push(getUnicodeConsonant(c, "standalone"));
+                inputCurrent = c;
+
+                console.log("0.1");
+                imeChange(0,1,false,array);
+            } else {
+                //0.2???? fuck it lets try and find out ig
+                //recreate?? last digit???
+                let c = hConsonantsR[[hex[1], hex[2]].join("").toUpperCase()];
+                array.pop();
+                array.push(getUnicodeConsonant(c, "standalone"));
+                inputCurrent = c;
+
+                console.log("0.2");
+                imeChange(0,2,false,array);
+            }
+        }
+    } else {
+        if (hex[3] <= 8) {
+            //standalone
+            console.log("full reset");
+            imeReset();
+        } else {
+            //trailing
+            if (previous == "trailing") {
+                //trailing twice
+                console.log("2.1");
+                imeChange(2,1,true,array);
+            } else {
+                //trailing once
+                console.log("2.0");
+                imeChange(2,0,true,array);
+            }
+        }
+    }
 }
 
 function imeInput(key) {
@@ -261,11 +390,8 @@ function imeInput(key) {
                 inputState = 3;
             }
             break;
-        case 3: //do nothing (i.e "waiting 4 u 2 hit enter")
-            break;
-        case 4: //cleanup (reset vars)
-            stateState = 0;
-            inputCurrent = "";
+        case 3: //go to next word uwu
+            //todo :)
             break;
     }
 }