shiftTop only if BOF

dhilt · dhilt · commit 2c49ec2c279c · 2019-08-29T01:03:13.000+03:00
diff --git a/src/modules/adapter.js b/src/modules/adapter.js
@@ -174,7 +174,10 @@ class Adapter {
       // try to catch "first" edge case on remove
       if (!options.immutableTop && !newItems.length) {
         // this is the first item, or the previous one's part of the "shift-top" group
-        if (position === 0 || this.buffer[position - 1].shiftTop) {
+        if (
+          (position === 0 && this.buffer.bof) ||
+          (position !== 0 && this.buffer[position - 1].shiftTop)
+        ) {
           wrapper.shiftTop = true;
         }
       }

Original file line number	Diff line number	Diff line change
`@@ -174,7 +174,10 @@ class Adapter {`
`174`	`174`	`// try to catch "first" edge case on remove`
`175`	`175`	`if (!options.immutableTop && !newItems.length) {`
`176`	`176`	`// this is the first item, or the previous one's part of the "shift-top" group`
`177`		`- if (position === 0 \|\| this.buffer[position - 1].shiftTop) {`
	`177`	`+ if (`
	`178`	`+ (position === 0 && this.buffer.bof) \|\|`
	`179`	`+ (position !== 0 && this.buffer[position - 1].shiftTop)`
	`180`	`+ ) {`
`178`	`181`	`wrapper.shiftTop = true;`
`179`	`182`	`}`
`180`	`183`	`}`