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fix an off by one in set cursor pos

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This commit is contained in:
Mitchell Hashimoto
2022-07-25 17:02:59 -07:00
parent 4f85c13d1b
commit 85a9e6fdf0
1 changed files with 8 additions and 2 deletions
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10
src/terminal/Terminal.zig
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@ -426,7 +426,7 @@ pub fn reverseIndex(self: *Terminal) !void {
// the right-most column. If row is 0, it is adjusted to 1. If row is
// greater than the bottom-most row it is adjusted to the bottom-most
// row.
pub fn setCursorPos(self: *Terminal, row: usize, col: usize) void {
pub fn setCursorPos(self: *Terminal, row_req: usize, col_req: usize) void {
// If cursor origin mode is set the cursor row will be moved relative to
// the top margin row and adjusted to be above or at bottom-most row in
// the current scroll region.
@ -441,14 +441,16 @@ pub fn setCursorPos(self: *Terminal, row: usize, col: usize) void {
y_max: usize,
} = if (self.modes.origin == 1) .{
.x_offset = 0, // TODO: left/right margins
.y_offset = self.scrolling_region.top,
.x_max = self.cols, // TODO: left/right margins
.y_offset = self.scrolling_region.top + 1,
.y_max = self.scrolling_region.bottom + 1, // We need this 1-indexed
} else .{
.x_max = self.cols,
.y_max = self.rows,
};
const row = if (row_req == 0) 1 else row_req;
const col = if (col_req == 0) 1 else col_req;
self.screen.cursor.x = @minimum(params.x_max, col) -| 1;
self.screen.cursor.y = @minimum(params.y_max, row + params.y_offset) -| 1;
// log.info("set cursor position: col={} row={}", .{ self.screen.cursor.x, self.screen.cursor.y });
@ -1114,6 +1116,10 @@ test "Terminal: setCursorPosition" {
try testing.expectEqual(@as(usize, 0), t.screen.cursor.x);
try testing.expectEqual(@as(usize, 9), t.screen.cursor.y);
t.setCursorPos(1, 1);
try testing.expectEqual(@as(usize, 0), t.screen.cursor.x);
try testing.expectEqual(@as(usize, 9), t.screen.cursor.y);
t.setCursorPos(100, 0);
try testing.expectEqual(@as(usize, 0), t.screen.cursor.x);
try testing.expectEqual(@as(usize, 79), t.screen.cursor.y);