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terminal: CBT respects left margin in origin mode

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This commit is contained in:
Mitchell Hashimoto
2023-10-06 15:48:05 -07:00
parent 017a2b34da
commit cf01cd87a4
1 changed files with 42 additions and 1 deletions
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43
src/terminal/Terminal.zig
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@ -1513,9 +1513,12 @@ pub fn horizontalTabBack(self: *Terminal) !void {
const tracy = trace(@src());
defer tracy.end();
// With origin mode enabled, our leftmost limit is the left margin.
const left_limit = if (self.modes.get(.origin)) self.scrolling_region.left else 0;
while (true) {
// If we're already at the edge of the screen, then we're done.
if (self.screen.cursor.x == 0) return;
if (self.screen.cursor.x == left_limit) return;
// Move the cursor left
self.screen.cursor.x -= 1;
@ -2314,6 +2317,44 @@ test "Terminal: horizontal tabs back" {
try testing.expectEqual(@as(usize, 0), t.screen.cursor.x);
}
test "Terminal: horizontal tabs back starting on tabstop" {
const alloc = testing.allocator;
var t = try init(alloc, 20, 5);
defer t.deinit(alloc);
t.screen.cursor.x = 8;
try t.print('X');
t.screen.cursor.x = 8;
try t.horizontalTabBack();
try t.print('A');
{
var str = try t.plainString(testing.allocator);
defer testing.allocator.free(str);
try testing.expectEqualStrings("A X", str);
}
}
test "Terminal: horizontal tabs with left margin in origin mode" {
const alloc = testing.allocator;
var t = try init(alloc, 20, 5);
defer t.deinit(alloc);
t.modes.set(.origin, true);
t.scrolling_region.left = 2;
t.scrolling_region.right = 5;
t.screen.cursor.x = 3;
try t.print('X');
try t.horizontalTabBack();
try t.print('A');
{
var str = try t.plainString(testing.allocator);
defer testing.allocator.free(str);
try testing.expectEqualStrings(" AX", str);
}
}
test "Terminal: setCursorPosition" {
var t = try init(testing.allocator, 80, 80);
defer t.deinit(testing.allocator);