Backspace fixed on list

dist/assets/a-doc-editor.js

@@ -43,11 +43,10 @@ var ADocEditor = function (customConfig) {
             style: { ...config.style }
         },
     ]
-    // // these lines are added only for testing please remove this on completion
-    // // paragraphs
+    // // paragraphs // this line is added only for testing please remove this on completion
     dataSet = JSON.parse('[{"id":1,"type":0,"formatedText":[],"plainContent":"Rendering text in HTML canvas involves using the CanvasRenderingContext2D interface to display text content within a canvas element. This process allows for dynamic text display, enabling the creation of custom text effects, labels, captions, or textual elements within the canvas.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#001"}},{"id":2,"type":0,"plainContent":"To render text on a canvas, developers typically use the fillText() method provided by the Canvas API. This method allows the specification of text content, font styles, position, and color. Additionally, the measureText() method helps in determining the width of text, facilitating accurate positioning and layout arrangements.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#001"}},{"id":3,"type":0,"plainContent":"Text in canvas can be customized by setting various font properties like font family, font size, style (bold, italic), alignment, and color. However, canvas text rendering lacks the text reflow and responsive layout capabilities inherent in HTML and CSS.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#001"}},{"id":4,"type":0,"plainContent":"Despite its intricacies, canvas text rendering offers unparalleled creative freedom, enabling the development of immersive graphical experiences, custom typography, and visually stunning representations that enhance user engagement and interactivity within web-based applications and games.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#001"}},{"id":5,"type":0,"plainContent":"Developers often use canvas text rendering to create graphical representations of text-based information, such as game interfaces, data visualizations, charts, and diagrams. Despite its flexibility in text manipulation and artistic possibilities, rendering text in canvas may require additional manual adjustments for formatting, spacing, and alignment compared to traditional HTML text rendering.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#001"}}]')
-    // // lists
-    dataSet = JSON.parse('[{"id":1,"type":0,"plainContent":"Hey there buddy! Can you bring these items from the groceries please. It will be really helpfull.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":2,"type":1,"tabCount":0,"plainContent":"Recipie book for vegetarian noodles","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":3,"type":1,"tabCount":0,"plainContent":"Noodles","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":4,"type":1,"tabCount":0,"plainContent":"Onion","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":5,"type":1,"tabCount":0,"plainContent":"Garlic","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":6,"type":1,"tabCount":0,"plainContent":"Some School stationaries for Arvind","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":7,"type":1,"tabCount":1,"plainContent":"Full pack of pen","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":8,"type":1,"tabCount":1,"plainContent":"Drawing kit","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":9,"type":1,"tabCount":1,"plainContent":"2 register size notebook","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":10,"type":1,"tabCount":0,"plainContent":"Window shields","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":11,"type":1,"tabCount":0,"plainContent":"Mosquito repelant","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]}]')
+    // // lists // this line is added only for testing please remove this on completion
+    dataSet = JSON.parse('[{"id":1,"type":0,"plainContent":"This is the list.","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":2,"type":1,"tabCount":0,"plainContent":"Recipie book for vegetarian noodles","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":3,"type":1,"tabCount":0,"plainContent":"Noodles","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":4,"type":1,"tabCount":0,"plainContent":"Onion","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":5,"type":1,"tabCount":0,"plainContent":"Garlic","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":6,"type":1,"tabCount":0,"plainContent":"Some School stationaries for Arvind","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":7,"type":1,"tabCount":1,"plainContent":"Full pack of pen","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":8,"type":1,"tabCount":1,"plainContent":"Drawing kit","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":9,"type":1,"tabCount":1,"plainContent":"2 register size notebook","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":10,"type":1,"tabCount":0,"plainContent":"Window shields","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]},{"id":11,"type":1,"tabCount":0,"plainContent":"Mosquito repelant","style":{"fontSize":30,"fontFamily":"Arial","bold":false,"italic":false,"fontColor":"#003"},"formatedText":[]}]')
 
     var lines = []
 
@@ -493,8 +492,21 @@ var ADocEditor = function (customConfig) {
                 ++caretData.index
             }
             else if (e.keyCode == 8) { // backspace
-                caretData.activeData.plainContent = caretData.activeData.plainContent.slice(0, caretData.index - 1) + caretData.activeData.plainContent.slice(caretData.index)
-                caretData.index = caretData.index <= 0 ? 0 : caretData.index - 1
+                if (caretData.index <= 0) {
+                    let currentIndex = dataSet.findIndex(item => item.id == caretData.activeData.id)
+                    if (currentIndex > 0) {
+                        caretData.activeData = dataSet[currentIndex - 1]
+                        caretData.index = dataSet[currentIndex - 1].plainContent.length
+                        if (dataSet[currentIndex].plainContent.length != 0) {
+                            caretData.activeData.plainContent += dataSet[currentIndex].plainContent
+                            caretData.activeData.formatedText.push(...dataSet[currentIndex].formatedText)
+                        }
+                        dataSet.splice(currentIndex, 1)
+                    }
+                } else {
+                    caretData.activeData.plainContent = caretData.activeData.plainContent.slice(0, caretData.index - 1) + caretData.activeData.plainContent.slice(caretData.index)
+                    caretData.index = caretData.index - 1
+                }
             }
             else if (e.keyCode == 37) { // left key
                 e.preventDefault()