sync: umm progress

src/shell/Wush.ts

@@ -25,15 +25,17 @@ export class Wush extends Shell {
         if (!isCharacter)
             switch (key) {
                 case 'Backspace':
-                    this.terminal.RemoveCells(1)
+                    this.terminal.RemoveCell()
+                    this.terminal.MoveCursor(-1, 0)
                     break
                 case 'Enter':
+                    this.terminal.MoveCursor(0, 4, { x: true, y: false })
                     this.Prompt()
                     break
             }
         else {
             this.terminal.Write(key)
-            this.terminal.AdjustCursorPosition(1, 0)
+            this.terminal.MoveCursor(1, 0)
         }
     }
 }

src/terminal/Terminal.ts

@@ -1,6 +1,7 @@
 import type { Shell } from '../shell/Shell'
 import type { EventBroadcaster } from '../utils/EventBroadcaster'
 import sqs from '../utils/sqs'
+import type { CellContent } from './CellContent'
 import type { CursorPosition, CursorStyle } from './CursorProperties'
 
 export class Terminal {
@@ -36,11 +37,7 @@ export class Terminal {
         this.SetCursorPosition(0, 0)
     }
 
-    AppendLine(content: string, moveCursor: boolean = true) {
-        if (moveCursor) {
-            this.AdjustCursorPosition(0, 1)
-        }
-
+    AppendLine() {
         const paragraph = document.createElement('p')
         paragraph.style.height = `${this.cellHeight}px`
         paragraph.style.lineHeight = `${this.cellHeight}px`
@@ -48,18 +45,20 @@ export class Terminal {
         paragraph.className = 'line'
 
         this.terminal.appendChild(paragraph)
-        this.AppendCells(content)
     }
 
+    /**
+     * @returns index of the last line on the page. -1 if there are no lines
+     */
     GetLastLineIndex(): number {
-        return Math.max(this.terminal.children.length - 1, 0)
+        return this.terminal.children.length - 1
     }
 
     Write(text: string) {
         let adjustment = 0
 
-        text.split('').forEach(char => {
-            this.AdjustCursorPosition(adjustment, 0)
+        text.split('').forEach((char) => {
+            this.MoveCursor(adjustment, 0)
             adjustment = 1
 
             this.SetCell(char)
@@ -69,12 +68,12 @@ export class Terminal {
     SetCell(char: string) {
         const selector = `#line-${this.cursorPosition.row} .cell-${this.cursorPosition.col}`
 
+        // adjust for the cursor
         console.log(`going from ${this.terminal.children.length - 1} to ${this.cursorPosition.row}`)
-
         if (!document.querySelector(`#line-${this.cursorPosition.row}`)) {
             for (let i = this.terminal.children.length - 1; i < this.cursorPosition.row; i++) {
                 console.log(i)
-                this.AppendLine('', false)
+                this.AppendLine()
             }
         }
 
@@ -98,19 +97,17 @@ export class Terminal {
     AppendCells(content: string) {
         const paragraph = sqs(`#line-${this.cursorPosition.row}`)
 
-        content.split('').forEach(char => {
+        content.split('').forEach((char) => {
             paragraph.textContent += char.replace(' ', '\u00A0')
-            this.AdjustCursorPosition(1, 0)
+            this.MoveCursor(1, 0)
         })
     }
 
-    RemoveCells(amount: number) {
-        const line = sqs(`#line-${this.cursorPosition.row}`)
-        const originalAmount = this.cursorPosition.row
+    RemoveCell() {
+        try {
+            sqs(`#line-${this.cursorPosition.row} .cell-${this.cursorPosition.col - 1}`).remove()
+        } catch (_) {
 
-        for (let i = originalAmount; i < originalAmount - amount; i--) {
-            line.querySelector(`.cell-${i}`)?.remove()
-            this.AdjustCursorPosition(-amount, 0)
         }
     }
 
@@ -148,17 +145,26 @@ export class Terminal {
         this.cursorPosition.col = Math.max(col, 0)
         this.cursorPosition.row = Math.max(row, 0)
 
-        this.UpdateCursor()
+        try {
+            sqs(`#line-${this.cursorPosition.row} .cell-${this.cursorPosition.col}`)
+        } catch (_) {
+            this.SetCell(' ')
+        } finally {
+            this.UpdateCursor()
+        }
     }
 
-    AdjustCursorPosition(col: number, row: number) {
-        this.SetCursorPosition(this.cursorPosition.col + col, this.cursorPosition.row + row)
+    MoveCursor(col: number, row: number, absolute: { x: boolean; y: boolean } = { x: false, y: false }) {
+        this.SetCursorPosition(
+            !absolute.x ? this.cursorPosition.col + col : col,
+            !absolute.y ? this.cursorPosition.row + row : row,
+        )
     }
 
     SetCursorStyle(style: CursorStyle) {
         switch (style) {
             default:
-                this.cursor.style.width = '1px'
+                this.cursor.style.width = `${this.cellWidth}px`
                 this.cursor.style.height = `${this.cellHeight}px`
         }
     }