Improve text layouting (closes #1)
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parent
eedb3fde4d
commit
adad7d7878
3 changed files with 113 additions and 85 deletions
196
generate_map.py
196
generate_map.py
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@ -241,11 +241,11 @@ def compute_bbox(ns):
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class BoundingBox:
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def __init__(self, left, top, right, bottom, meta=None, base_weight=0):
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def __init__(self, left, top, right=None, bottom=None, *, width=None, height=None, meta=None, base_weight=0):
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self.left = left
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self.top = top
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self.right = right
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self.bottom = bottom
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self.right = right if width is None else left + width
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self.bottom = bottom if height is None else top + height
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self.meta = meta
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self.base_weight = base_weight
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self.finished = False
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@ -270,7 +270,9 @@ class BoundingBox:
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def __add__(self, other):
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if not isinstance(other, tuple) and not isinstance(other, list):
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raise TypeError()
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return BoundingBox(self.left + other[0], self.top + other[1], self.right + other[0], self.bottom + other[1], self.meta, self.base_weight)
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return BoundingBox(self.left + other[0], self.top + other[1],
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self.right + other[0], self.bottom + other[1],
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width=None, height=None, meta=self.meta, base_weight=self.base_weight)
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def __iadd__(self, other):
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if not isinstance(other, tuple) and not isinstance(other, list):
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@ -284,7 +286,9 @@ class BoundingBox:
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def __sub__(self, other):
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if not isinstance(other, tuple) and not isinstance(other, list):
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raise TypeError()
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return BoundingBox(self.left - other[0], self.top - other[1], self.right - other[0], self.bottom - other[1], self.meta, self.base_weight)
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return BoundingBox(self.left - other[0], self.top - other[1],
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self.right - other[0], self.bottom - other[1],
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width=None, height=None, meta=self.meta, base_weight=self.base_weight)
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def __isub__(self, other):
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if not isinstance(other, tuple) and not isinstance(other, list):
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@ -314,7 +318,35 @@ class BoundingBox:
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return (c1[0] - c2[0])**2 + (c1[1] - c2[1])**2
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def with_margin(self, margin):
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return BoundingBox(self.left - margin, self.top - margin, self.right + margin, self.bottom + margin, self.meta, self.base_weight)
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return BoundingBox(self.left - margin, self.top - margin,
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self.right + margin, self.bottom + margin,
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width=None, height=None, meta=self.meta, base_weight=self.base_weight)
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def chebyshev_distance(self, other):
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if other in self:
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return 0
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if isinstance(other, BoundingBox):
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if other.left < self.left < other.right or other.left < self.right < other.right:
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dh = 0
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else:
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dh = min(abs(self.left - other.right), abs(self.right - other.left))
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if other.top < self.top < other.bottom or other.top < self.bottom < other.bottom:
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dv = 0
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else:
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dv = min(abs(self.top - other.bottom), abs(self.bottom - other.top))
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return max(dh, dv)
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elif isinstance(other, tuple) or isinstance(other, list):
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if self.left < other[0] < self.right:
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dh = 0
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else:
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dh = min(abs(self.left - other[0]), abs(self.right - other[0]))
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if self.top < other[1] < self.bottom:
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dv = 0
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else:
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dv = min(abs(self.top - other[1]), abs(self.bottom - other[1]))
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return max(dh, dv)
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else:
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raise TypeError()
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def compute_weight(self, other, erfas, chaostreffs, ns):
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w = 0
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@ -323,14 +355,18 @@ class BoundingBox:
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swc = self.with_margin(ns.dotsize_treff)
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swme = swm.with_margin(ns.dotsize_erfa)
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swmc = swm.with_margin(ns.dotsize_treff)
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# I hope these weights are somewhat reasonably balanced...
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for o in other:
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if o.meta['city'] == self.meta['city']:
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continue
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if o in self:
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if o.finished:
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w += 50
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w += 1000
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else:
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w += 3
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w += 50
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else:
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w += max(ns.font_distance*2 - swc.chebyshev_distance(o), 0)
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continue
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if o in swm:
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if o.finished:
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w += 3
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@ -340,48 +376,18 @@ class BoundingBox:
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if city == self.meta['city']:
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continue
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if location in swe:
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w += 15
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if location in swme:
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w += 2
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w += 1000
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else:
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w += max(ns.font_distance*2 - swe.chebyshev_distance(location), 0)
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for city, location in chaostreffs.items():
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if city == self.meta['city']:
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continue
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if location in swc:
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w += 5
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if location in swmc:
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w += 1
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w += 1000
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else:
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w += max(ns.font_distance*2 - swc.chebyshev_distance(location), 0)
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self._weight = w
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def compute_finalized_weight(self, other, erfas, chaostreffs, ns):
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w = 0
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swm = self.with_margin(ns.font_distance)
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swe = self.with_margin(ns.dotsize_erfa)
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swc = self.with_margin(ns.dotsize_treff)
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swme = swm.with_margin(ns.dotsize_erfa)
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swmc = swm.with_margin(ns.dotsize_treff)
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for o in other:
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if o.meta['city'] == self.meta['city']:
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continue
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if o in self:
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w += 100
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if o in swm:
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w += 15
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for city, location in erfas.items():
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if city == self.meta['city']:
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continue
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if location in swe:
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w += 100
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if location in swme:
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w += 10
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for city, location in chaostreffs.items():
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if city == self.meta['city']:
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continue
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if location in swc:
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w += 100
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if location in swmc:
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w += 5
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self._weight = w
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@property
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def weight(self):
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return self._weight + self.base_weight
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@ -390,67 +396,92 @@ class BoundingBox:
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def is_optimal(self):
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return self._weight == 0
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def __str__(self):
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return f'(({int(self.left)}, {int(self.top)}, {int(self.right)}, {int(self.bottom)}), weight={self.weight})'
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def optimize_text_layout(ns, erfas, chaostreffs, size, svg):
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font = ImageFont.truetype(ns.font, ns.font_size)
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pil = ImageDraw(Image.new('P', size))
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pil = ImageDraw(Image.new('P', (1, 1)))
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xheight = -pil.textbbox((0,0), 'x', font=font, anchor='ls')[1]
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capheight = -pil.textbbox((0,0), 'A', font=font, anchor='ls')[1]
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voffset = - capheight / 2
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candidates = {}
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for city, location in erfas.items():
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text = city
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erfax, erfay = location
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for rfrom, to in ns.rename:
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if rfrom == city:
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text = to
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break
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rbox = pil.textbbox((location[0] + ns.font_distance, location[1] - ns.font_size/2), text, font=font, anchor='lt')
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rbox = BoundingBox(*rbox, meta={'city': city, 'side': 'r', 'text': text})
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rbox.right += 1.5 * ns.font_distance
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lbox = pil.textbbox((location[0] - ns.font_distance, location[1] - ns.font_size/2), text, font=font, anchor='rt')
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lbox = BoundingBox(*lbox, meta={'city': city, 'side': 'l', 'text': text})
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lbox.left -= 1.5 * ns.font_distance
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if location[0] > 0.8 * size[0]:
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meta = {'city': city, 'text': text, 'baseline': capheight}
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textbox = pil.textbbox((0, 0), text, font=font, anchor='ls') # left, baseline at 0,0
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mw, mh = textbox[2] - textbox[0], textbox[3] - textbox[1]
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rbox = BoundingBox(erfax + ns.font_distance, erfay + voffset, width=mw, height=mh, meta=meta)
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lbox = BoundingBox(erfax - ns.font_distance - mw, erfay + voffset, width=mw, height=mh, meta=meta)
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if erfax > 0.8 * size[0]:
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rbox.base_weight += 0.001
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else:
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lbox.base_weight += 0.001
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candidates[city] = [lbox, lbox + (0, ns.dotsize_erfa), lbox + (0, ns.dotsize_erfa*2), lbox - (0, ns.dotsize_erfa), lbox - (0, ns.dotsize_erfa*2), rbox, rbox + (0, ns.dotsize_erfa), rbox + (0, ns.dotsize_erfa*2), rbox - (0, ns.dotsize_erfa), rbox - (0, ns.dotsize_erfa*2)]
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candidates[city] = [lbox, rbox]
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for i in range(-2, 3):
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if i == 0:
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continue
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candidates[city].append(lbox + (0, ns.dotsize_erfa*i))
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candidates[city].append(rbox + (0, ns.dotsize_erfa*i))
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candidates[city].extend([
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BoundingBox(erfax - mw/2, erfay - ns.font_distance - mh, width=mw, height=mh, meta=meta, base_weight=0.001),
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BoundingBox(erfax - mw/2, erfay + ns.font_distance, width=mw, height=mh, meta=meta, base_weight=0.001),
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BoundingBox(erfax - ns.dotsize_erfa, erfay - ns.font_distance - mh, width=mw, height=mh, meta=meta, base_weight=0.002),
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BoundingBox(erfax - ns.dotsize_erfa, erfay + ns.font_distance, width=mw, height=mh, meta=meta, base_weight=0.003),
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BoundingBox(erfax + ns.dotsize_erfa - mw, erfay - ns.font_distance - mh, width=mw, height=mh, meta=meta, base_weight=0.001),
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BoundingBox(erfax + ns.dotsize_erfa - mw, erfay + ns.font_distance, width=mw, height=mh, meta=meta, base_weight=0.001),
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])
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rbox.base_weight -= 0.003
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lbox.base_weight -= 0.003
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if ns.debug:
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for c in candidates[city]:
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di = etree.Element('rect', x=str(c.left), y=str(c.top + capheight - xheight), width=str(c.width), height=str(xheight))
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di.set('class', 'debugright')
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dr = etree.Element('rect', x=str(c.left), y=str(c.top), width=str(c.width), height=str(c.height))
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dr.set('class', 'debugleft')
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svg.append(di)
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svg.append(dr)
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unfinished = {c for c in erfas.keys()}
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finished = {}
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while len(unfinished) > 0:
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with tqdm.tqdm(total=len(erfas)) as progress:
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while len(unfinished) > 0:
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progress.update(len(erfas) - len(unfinished))
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all_boxes = set(finished.values())
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unfinished_boxes = set()
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for city in unfinished:
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all_boxes.update(candidates[city])
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unfinished_boxes.update(candidates[city])
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for box in all_boxes:
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box.compute_weight(all_boxes, erfas, chaostreffs, ns)
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# Get candidate with the least number of optimal solutions > 0
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optcity = min(unfinished, key=lambda city: len([1 for box in candidates[city] if box.is_optimal]) or float('inf'))
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optboxes = [box for box in candidates[optcity] if box.is_optimal]
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if len(optboxes) > 0:
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finished[optcity] = min(optboxes, key=lambda box: box.weight)
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finished[optcity].finished = True
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unfinished.discard(optcity)
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continue
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# If no candidate with at least one optimal solution is left, go by global minimum
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minbox = min(unfinished_boxes, key=lambda box: box.weight)
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mincity = minbox.meta['city']
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finished[mincity] = minbox
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minbox.finished = True
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unfinished.discard(mincity)
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all_boxes = set(finished.values())
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unfinished_boxes = set()
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for city in unfinished:
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all_boxes.update(candidates[city])
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unfinished_boxes.update(candidates[city])
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for box in all_boxes:
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box.compute_weight(all_boxes, erfas, chaostreffs, ns)
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# Get candidate with the least number of optimal solutions > 0
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optcity = min(unfinished, key=lambda city: len([1 for box in candidates[city] if box.is_optimal]) or float('inf'))
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optboxes = [box for box in candidates[optcity] if box.is_optimal]
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if len(optboxes) > 0:
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finished[optcity] = min(optboxes, key=lambda box: box.weight)
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finished[optcity].finished = True
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unfinished.discard(optcity)
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continue
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# If no candidate with at least one optimal solution is left, go by global minimum
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minbox = min(unfinished_boxes, key=lambda box: box.weight)
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mincity = minbox.meta['city']
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finished[mincity] = minbox
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minbox.finished = True
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unfinished.discard(mincity)
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# Iteratively improve the layout
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for i in tqdm.tqdm(range(len(finished))):
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@ -460,7 +491,7 @@ def optimize_text_layout(ns, erfas, chaostreffs, size, svg):
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for city in order:
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all_boxes = set(finished.values())
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for box in candidates[city]:
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box.compute_finalized_weight(all_boxes, erfas, chaostreffs, ns)
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box.compute_weight(all_boxes, erfas, chaostreffs, ns)
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minbox = min(candidates[city], key=lambda box: box.weight)
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if minbox is not finished[city]:
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changed = True
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@ -607,10 +638,7 @@ def create_svg(ns, bbox):
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print('Layouting labels')
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texts = optimize_text_layout(ns, erfas, chaostreffs, (int(svg_box[0]), int(svg_box[1])), svg)
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for city, box in texts.items():
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if box.meta['side'] == 'l':
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box += (1.5 * ns.font_distance, 0)
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text = etree.Element('text', x=str(box.left), y=str(box.top))
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text.set('alignment-baseline', 'hanging')
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text = etree.Element('text', x=str(box.left), y=str(box.top + box.meta['baseline']))
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text.set('class', 'erfalabel')
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text.set('data-erfa', city)
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text.text = box.meta['text']
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@ -635,8 +663,8 @@ def main():
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ap.add_argument('--bbox-margin', type=float, default=0.3, help='Margin around the inferred bounding box. Ignored with --bbox')
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ap.add_argument('--stylesheet', type=str, default='style/erfamap.css', help='Stylesheet for the generated SVG')
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ap.add_argument('--font', type=str, default='style/concertone-regular.ttf', help='Name of the font used in the stylesheet.')
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ap.add_argument('--font-size', type=int, default=40, help='Size of the font used in the stylesheet.')
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ap.add_argument('--font-distance', type=int, default=15, help='Distance of labels from their dots center')
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ap.add_argument('--font-size', type=int, default=45, help='Size of the font used in the stylesheet.')
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ap.add_argument('--font-distance', type=int, default=18, help='Distance of labels from their dots center')
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ap.add_argument('--dotsize-erfa', type=float, default=13, help='Radius of Erfa dots')
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ap.add_argument('--dotsize-treff', type=float, default=8, help='Radius of Chaostreff dots')
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ap.add_argument('--rename', type=str, action='append', nargs=2, metavar=('FROM', 'TO'), default=[], help='Rename a city with an overly long name (e.g. "Rothenburg ob der Tauber" to "Rothenburg")')
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BIN
map.readme.png
BIN
map.readme.png
Binary file not shown.
Before Width: | Height: | Size: 412 KiB After Width: | Height: | Size: 421 KiB |
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@ -29,7 +29,7 @@ circle.erfa, circle.chaostreff {
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text.erfalabel {
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font-family: concertone;
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font-size: 40px;
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font-size: 45px;
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}
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rect.debugleft {
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