diff options
Diffstat (limited to 'src/de/mud/terminal/VDUBuffer.java')
| -rw-r--r-- | src/de/mud/terminal/VDUBuffer.java | 33 |
1 files changed, 29 insertions, 4 deletions
diff --git a/src/de/mud/terminal/VDUBuffer.java b/src/de/mud/terminal/VDUBuffer.java index a0d6b3b..90d5452 100644 --- a/src/de/mud/terminal/VDUBuffer.java +++ b/src/de/mud/terminal/VDUBuffer.java @@ -481,10 +481,13 @@ public class VDUBuffer { int bottom = (l > bottomMargin ? height - 1: (l < topMargin?topMargin:bottomMargin + 1)); - System.arraycopy(charArray, screenBase + l + 1, - charArray, screenBase + l, bottom - l - 1); - System.arraycopy(charAttributes, screenBase + l + 1, - charAttributes, screenBase + l, bottom - l - 1); + int numRows = bottom - l - 1; + if (numRows > 0) { + System.arraycopy(charArray, screenBase + l + 1, + charArray, screenBase + l, numRows); + System.arraycopy(charAttributes, screenBase + l + 1, + charAttributes, screenBase + l, numRows); + } charArray[screenBase + bottom - 1] = new char[width]; charAttributes[screenBase + bottom - 1] = new int[width]; markLine(l, bottom - l); @@ -613,6 +616,28 @@ public class VDUBuffer { } /** + * Set the scroll margins simultaneously. If they're backwards, swap them. + * If they're out of bounds, trim them. + * @param l1 line that is the top + * @param l2 line that is the bottom + */ + public void setMargins(int l1, int l2) { + if (l1 > l2) { + int temp = l2; + l2 = l1; + l1 = temp; + } + + if (l1 < 0) + l1 = 0; + if (l2 > height - 1) + l2 = height - 1; + + topMargin = l1; + bottomMargin = l2; + } + + /** * Set the top scroll margin for the screen. If the current bottom margin * is smaller it will become the top margin and the line will become the * bottom margin. |