From 2ad0ba8506d9a64bf389264dca2adee66e185836 Mon Sep 17 00:00:00 2001
From: Francisco Hodge <hello@franciscohodge.com>
Date: Sat, 6 Oct 2018 02:22:02 -0400
Subject: [PATCH] Cursor position support

---
 src/lib/components/Keyboard.js | 27 +++++++++++++++++++++++++++
 src/lib/services/Utilities.js  | 16 ++++++++++++++--
 2 files changed, 41 insertions(+), 2 deletions(-)

diff --git a/src/lib/components/Keyboard.js b/src/lib/components/Keyboard.js
index 0c750725..46f449a7 100644
--- a/src/lib/components/Keyboard.js
+++ b/src/lib/components/Keyboard.js
@@ -167,6 +167,8 @@ class SimpleKeyboard {
   clear = () => {
     this.keyboardDOM.innerHTML = '';
     this.keyboardDOM.className = this.keyboardDOMClass;
+    this.buttonElements = {};
+    this.caretPosition = null;
   }
 
   dispatch = (callback) => {
@@ -196,6 +198,31 @@ class SimpleKeyboard {
     return output;
   }
 
+  handleCaret = () => {
+    if(this.options.debug){
+      console.log("Caret handling started");
+    }
+
+    let handler = (event) => {
+      let targetTagName = event.target.tagName.toLowerCase();
+
+      if(
+        targetTagName === "textarea" ||
+        targetTagName === "input"
+      ){
+        this.caretPosition = event.target.selectionStart;
+
+        if(this.options.debug){
+          console.log('Caret at: ', event.target.selectionStart, event.target.tagName.toLowerCase());
+        }     
+      }
+    };
+
+    document.addEventListener("keyup", handler);
+    document.addEventListener("mouseup", handler);
+    document.addEventListener("touchend", handler);
+  }
+
   render = () => {
     /**
      * Clear keyboard
diff --git a/src/lib/services/Utilities.js b/src/lib/services/Utilities.js
index 49d642dc..297f52ea 100644
--- a/src/lib/services/Utilities.js
+++ b/src/lib/services/Utilities.js
@@ -1,5 +1,9 @@
 class Utilities {
-  static normalizeString(string){
+  constructor(simpleKeyboardInstance){
+    this.simpleKeyboardInstance = simpleKeyboardInstance;
+  }
+
+  normalizeString(string){
     let output;
 
     if(string === "@")
@@ -166,7 +170,15 @@ class Utilities {
     else if(button === "{numpaddecimal}")
       output = output + '.';
     else if(!button.includes("{") && !button.includes("}"))
-      output = output + button;
+
+  updateCaretPos = (length, minus) => {
+    if(minus){
+      this.simpleKeyboardInstance.caretPosition = this.simpleKeyboardInstance.caretPosition - length
+    } else {
+      this.simpleKeyboardInstance.caretPosition = this.simpleKeyboardInstance.caretPosition + length;
+    }
+  }
+
 
     return output;
   }