to mathml text

demo/main.ts

@@ -40,3 +40,4 @@ keyboard_button.addEventListener('pointerdown', () => {
         soft_keyboard.container.style.display = 'none'
     }
 })
+

src/mathio.ts

@@ -42,6 +42,28 @@ export class MathIO {
     private warn(warning: string) {
         if(this._warn_handle) this._warn_handle(warning)
     }
+    to_ml_text(): string {
+        let result;
+        let prev_e = this.cursor.previousElementSibling;
+        if(prev_e) {
+            this.cursor.remove();
+            result = this.root_node.innerHTML;
+            prev_e.insertAdjacentElement('afterend', this.cursor);
+            return result;
+        }
+        let next_e = this.cursor.nextElementSibling;
+        if(next_e) {
+            this.cursor.remove();
+            result = this.root_node.innerHTML;
+            next_e.insertAdjacentElement('beforebegin', this.cursor);
+            return result
+        }
+        let parent = this.cursor.parentElement as Element;
+        this.cursor.remove();
+        result = this.root_node.innerHTML;
+        parent.appendChild(this.cursor);
+        return result;
+    }
     on_pointerdown(event: PointerEvent) {
         let e = event.target;
         if(!(e instanceof Element)) return;

src/soft_keyboard.ts

@@ -528,8 +528,8 @@ function more_keys(on_key: (key: string) => void): HTMLElement {
 	result.style.width = '10%'
 	let svg = inner_svg() 
 	result.appendChild(svg)
-	let polyline = svg_polyline('20,40 20,80 60,80 60,40');
-	let polygon = svg_polygon('40,20 80,20 80,60 60,60 60,40 40,40');
+	let polyline = svg_polyline('20,40 20,80 60,80 60,40 20,40');
+	let polygon = svg_polygon('40,20 80,20 80,60 60,60 60,40 40,40 40,20');
 	svg.append(polygon, polyline);
 	return result
 }

target/mathio.d.ts

@@ -13,6 +13,7 @@ export declare class MathIO {
     set vertical_fraction(setting: boolean);
     constructor();
     private warn;
+    to_ml_text(): string;
     on_pointerdown(event: PointerEvent): void;
     on_key(key: string): void;
     private start_completing;

target/mathio.js

@@ -35,6 +35,28 @@ export class MathIO {
         if (this._warn_handle)
             this._warn_handle(warning);
     }
+    to_ml_text() {
+        let result;
+        let prev_e = this.cursor.previousElementSibling;
+        if (prev_e) {
+            this.cursor.remove();
+            result = this.root_node.innerHTML;
+            prev_e.insertAdjacentElement('afterend', this.cursor);
+            return result;
+        }
+        let next_e = this.cursor.nextElementSibling;
+        if (next_e) {
+            this.cursor.remove();
+            result = this.root_node.innerHTML;
+            next_e.insertAdjacentElement('beforebegin', this.cursor);
+            return result;
+        }
+        let parent = this.cursor.parentElement;
+        this.cursor.remove();
+        result = this.root_node.innerHTML;
+        parent.appendChild(this.cursor);
+        return result;
+    }
     on_pointerdown(event) {
         var _a;
         let e = event.target;

target/soft_keyboard.js

@@ -504,8 +504,8 @@ function more_keys(on_key) {
     result.style.width = '10%';
     let svg = inner_svg();
     result.appendChild(svg);
-    let polyline = svg_polyline('20,40 20,80 60,80 60,40');
-    let polygon = svg_polygon('40,20 80,20 80,60 60,60 60,40 40,40');
+    let polyline = svg_polyline('20,40 20,80 60,80 60,40 20,40');
+    let polygon = svg_polygon('40,20 80,20 80,60 60,60 60,40 40,40 40,20');
     svg.append(polygon, polyline);
     return result;
 }