Finish the straight line box drawing characters

kitty/fonts/box_drawing.py

@@ -18,13 +18,92 @@ def half_hline(buf, width, height, level=1, which='left'):
     sz = thickness(level=level, horizontal=True)
     start = height // 2 - sz // 2
     for y in range(start, start + sz):
+        offset = y * width
         for x in (range(0, width // 2) if which == 'left' else range(width // 2, width)):
-            buf[y * width + x] = 255
+            buf[offset + x] = 255
+
+
+def half_vline(buf, width, height, level=1, which='top'):
+    sz = thickness(level=level, horizontal=False)
+    start = width // 2 - sz // 2
+    for x in range(start, start + sz):
+        for y in (range(0, height // 2) if which == 'top' else range(height // 2, height)):
+            buf[x + y * width] = 255
+
+
+def get_holes(sz, hole_sz, num):
+    if num == 1:
+        pts = [sz // 2]
+    elif num == 2:
+        pts = (sz // 3, 2 * (sz // 3))
+    elif num == 3:
+        pts = (sz // 4, sz // 2, 3 * (sz // 4))
+    holes = []
+    for c in pts:
+        holes.append(tuple(range(c - hole_sz // 2, c - hole_sz // 2 + hole_sz)))
+    return holes
+
+
+def add_hholes(buf, width, height, level=1, num=1, hole_sz=3):
+    line_sz = thickness(level=level, horizontal=True)
+    hole_sz = thickness(level=hole_sz, horizontal=False)
+    start = height // 2 - line_sz // 2
+    holes = get_holes(width, hole_sz, num)
+    for y in range(start, start + line_sz):
+        offset = y * width
+        for hole in holes:
+            for x in hole:
+                buf[offset + x] = 0
+
+
+def add_vholes(buf, width, height, level=1, num=1, hole_sz=3):
+    line_sz = thickness(level=level, horizontal=False)
+    hole_sz = thickness(level=hole_sz, horizontal=True)
+    start = width // 2 - line_sz // 2
+    holes = get_holes(height, hole_sz, num)
+    for x in range(start, start + line_sz):
+        for hole in holes:
+            for y in hole:
+                buf[x + width * y] = 0
+
+
+def hline(*a, level=1):
+    half_hline(*a, level=level)
+    half_hline(*a, level=level, which='right')
+
+
+def vline(*a, level=1):
+    half_vline(*a, level=level)
+    half_vline(*a, level=level, which='bottom')
+
+
+def hholes(*a, level=2, num=1):
+    hline(*a, level=level)
+    add_hholes(*a, level=level, num=num)
+
+
+def vholes(*a, level=1, num=1):
+    vline(*a, level=level)
+    add_vholes(*a, level=level, num=num)
 
 
 box_chars = {
-    '─': [half_hline, p(half_hline, which='right')],
-    '━': [p(half_hline, level=3), p(half_hline, level=3, which='right')],
+    '─': [hline],
+    '━': [p(hline, level=3)],
+    '│': [vline],
+    '┃': [p(vline, level=3)],
+    '╌': [hholes],
+    '╍': [p(hholes, level=3)],
+    '┄': [p(hholes, num=2)],
+    '┅': [p(hholes, num=2, level=3)],
+    '┈': [p(hholes, num=3)],
+    '┉': [p(hholes, num=3, level=3)],
+    '╎': [vholes],
+    '╏': [p(vholes, level=3)],
+    '┆': [p(vholes, num=2)],
+    '┇': [p(vholes, num=2, level=3)],
+    '┊': [p(vholes, num=3)],
+    '┋': [p(vholes, num=3, level=3)],
 }