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feat(term): implement clear() method

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Clears all but the bottommost row of the terminal (including scrollback
buffer) and moves the bottommost row to the top.
This commit is contained in:
Leroy Hopson 2024-03-03 22:25:14 +13:00
parent fc03595e29
commit d00a31fb45
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GPG key ID: D2747312A6DB51AA
4 changed files with 82 additions and 12 deletions
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41
test/test_rendering.gd
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@ -12,7 +12,7 @@ func get_described_class():
func pick_cell_color(cell := Vector2i(0, 0)) -> Color:
var cell_size = subject.get_cell_size()
var pixelv = Vector2(cell) * cell_size + (cell_size / 2)
return get_viewport().get_texture().get_image().get_pixelv(cell_size / 2)
return get_viewport().get_texture().get_image().get_pixelv(pixelv)
func before_each():
@ -27,9 +27,20 @@ func before_each():
class TestRendering:
extends RenderingTest
# Fill the terminal with colored blocks.
func fill_color(color = Color.BLACK, rows: int = subject.get_rows()):
subject.write("\u001b[38;2;%d;%d;%dm" % [color.r8, color.g8, color.b8])
subject.write("█".repeat(subject.get_cols() * rows))
func test_render():
fill_color(Color.BLUE)
await wait_for_signal(subject.draw, 3)
await wait_frames(15)
var cell_color = pick_cell_color()
assert_eq(cell_color, Color.BLUE)
func test_update():
subject.write("\u001b[38;2;255;0;0m")
subject.write("█".repeat(subject.get_cols() * subject.get_rows()))
fill_color(Color.RED)
await get_tree().physics_frame
subject.queue_redraw()
await wait_for_signal(subject.draw, 3)
@ -37,6 +48,30 @@ class TestRendering:
var cell_color = pick_cell_color(Vector2i(0, 0))
assert_eq(cell_color, Color.RED)
func test_clear_clears_all_but_the_first_row():
await wait_frames(15)
var cell = Vector2i(0, 1) # Pick a cell not on the first row.
var original_color = pick_cell_color(cell)
call_deferred("fill_color", Color.CYAN)
await wait_for_signal(subject.draw, 3)
await wait_frames(15)
subject.clear()
await wait_for_signal(subject.draw, 3)
await wait_frames(15)
var cell_color = pick_cell_color(cell)
assert_eq(cell_color, original_color)
func test_clear_keeps_the_last_row():
fill_color(Color.GREEN)
fill_color(Color.ORANGE, 1)
await wait_for_signal(subject.draw, 3)
await wait_frames(15)
subject.clear()
await wait_for_signal(subject.draw, 3)
await wait_frames(15)
var cell_color = pick_cell_color(Vector2i(0, 0))
assert_eq(cell_color, Color.ORANGE)
class TestKeyPressed:
extends RenderingTest