improved vertical resize calcs

README.md

@@ -53,18 +53,18 @@ Ensure you have your latest graphics card drivers installed before use.
 
 | Feature                     | Done | Notes |
 |-----------------------------|------|-------|
-| Pty allocation              | ✔    | Needs work for OSX + Windows
+| Pty allocation              | ✔    | 
 | OpenGL rendering            | ✔    |
 | 8-bit (256) colour          | ✔    |
 | 24-bit (true) colour        | ✔    |
-| Resizing/content reordering | ⏳    | 
-| ANSI escape codes           | ⏳    | Most of these are handled now
+| Resizing/content reordering | ✔    | 
+| ANSI escape codes           | ✔    | 
 | UTF-8 input                 | ✔    | 
 | UTF-8 output                | ✔    | Works as long as the font in use supports the relevant characters.
 | Copy/paste                  |      | Paste working, no mouse interaction for copy
 | Customisable colour schemes | ✔    | Complete, but the config file has no entry for this yet 
-| Config file                 | ⏳    | Minimal options atm
-| Scrolling                   | ⏳    | Infinite buffer implemented, need GUI scrollbar & render updates
+| Config file                 | ✔    | Minimal options atm
+| Scrolling                   | ✔    | 
 | Mouse interaction           |      | 
 | Sweet render effects        |      | 
 

buffer/buffer.go

@@ -671,22 +671,20 @@ func (buffer *Buffer) ResizeView(width uint16, height uint16) {
 		}
 	}
 
-	// @todo handle vertical resize?
-
-	if buffer.Height() < int(buffer.viewHeight) {
-		// we might need to move back up if the buffer is now smaller
-		if int(buffer.cursorY) < buffer.Height()-1 {
-			buffer.cursorY = uint16(buffer.Height() - 1)
-		} else {
-			buffer.cursorY = uint16(buffer.Height() - 1)
-		}
-	} else {
-		buffer.cursorY = buffer.viewHeight - 1
-	}
+	fromBottom := buffer.viewHeight - buffer.cursorY
 
 	buffer.viewWidth = width
 	buffer.viewHeight = height
 
+	if buffer.cursorY >= buffer.viewHeight-1 {
+		buffer.cursorY = buffer.viewHeight - 1
+	} else {
+		buffer.cursorY = buffer.viewHeight - fromBottom
+		if int(buffer.cursorY) >= buffer.Height() {
+			buffer.cursorY = uint16(buffer.Height() - 1)
+		}
+	}
+
 	// position cursorX
 	line = buffer.getCurrentLine()
 	buffer.cursorX = uint16((len(line.cells) - cXFromEndOfLine) - 1)