528 lines
19 KiB
Python
528 lines
19 KiB
Python
import base64
|
||
import math
|
||
import pathlib
|
||
from flask import Flask, render_template, request, Response
|
||
from html import escape
|
||
from fontTools.ttLib import TTFont
|
||
from fontTools.pens.svgPathPen import SVGPathPen
|
||
|
||
app = Flask(__name__)
|
||
|
||
VERSION = "0.82"
|
||
|
||
_LOGO_PATH = pathlib.Path(__file__).parent / 'static' / 'logo.png'
|
||
_LOGO_B64 = base64.b64encode(_LOGO_PATH.read_bytes()).decode()
|
||
|
||
_FONT_PATH = pathlib.Path('/usr/local/share/fonts/г/ГОСТ_тип_А.ttf')
|
||
_FONT_B64 = base64.b64encode(_FONT_PATH.read_bytes()).decode()
|
||
_FONT_FACE = (
|
||
'<defs><style>'
|
||
'@font-face {'
|
||
'font-family:"ГОСТ тип А";'
|
||
f'src:url("data:font/truetype;base64,{_FONT_B64}") format("truetype");'
|
||
'}'
|
||
'</style></defs>'
|
||
)
|
||
|
||
_FONT_OBJ = TTFont(str(_FONT_PATH))
|
||
_GLYPH_SET = _FONT_OBJ.getGlyphSet()
|
||
_CMAP = _FONT_OBJ.getBestCmap()
|
||
_HMTX = _FONT_OBJ['hmtx'].metrics
|
||
_UPM = _FONT_OBJ['head'].unitsPerEm
|
||
_GLYF = _FONT_OBJ['glyf']
|
||
|
||
# SVG absolute coordinate constants (1 user unit = 1 mm)
|
||
ZERO_X = 60.844130
|
||
MAX_X = 180.251230
|
||
BAR_Y = 107.54670
|
||
SCALE_LEN = MAX_X - ZERO_X # 119.4071 mm
|
||
|
||
BIG_H = 5.0895
|
||
SMALL_H = 2.6683
|
||
|
||
_UNIT_AREA_WIDTH = 18.445
|
||
_UNIT_SCALE_X = 0.96486402
|
||
_UNIT_MAX_FS = 18.7981
|
||
|
||
# --- Inline markup for the unit label -------------------------------------
|
||
# Lighter-shorthand notation, rendered with the ГОСТ font (no LaTeX engine):
|
||
# ^x / ^{...} superscript _x / _{...} subscript
|
||
# {a/b} stacked fraction (vinculum); a bare '/' stays inline
|
||
# The `{...}` argument after ^/_ and the two sides of a fraction are parsed
|
||
# recursively, so constructs nest (e.g. {m/s^2}, x^{1/2}).
|
||
_SUP_SCALE = 0.62 # size of a super/subscript relative to its base
|
||
_SUP_RISE = 0.36 # superscript baseline lift, in base ems
|
||
_SUB_DROP = 0.14 # subscript baseline drop, in base ems
|
||
_FRAC_SCALE = 0.62 # size of numerator/denominator relative to fraction
|
||
_FRAC_AXIS = 0.32 # vinculum height above the base baseline, in base ems
|
||
_FRAC_GAP = 0.14 # gap between numerator/denominator ink and the vinculum
|
||
_FRAC_SIDE = 0.12 # vinculum overhang past the wider side, in sub ems
|
||
|
||
# Target box for the unit label (absolute panel coords). A marked-up unit is
|
||
# scaled to fit and centered inside this box, leaving white space around it.
|
||
# The panel spans y 90.55..117.05; the scale bar starts at x 58.44.
|
||
_UNIT_BOX_X0, _UNIT_BOX_X1 = 39.6, 57.4
|
||
_UNIT_BOX_Y0, _UNIT_BOX_Y1 = 92.8, 114.8
|
||
|
||
|
||
def _glyph_svg(ch: str, x: float, y: float, fs: float, fill: str):
|
||
"""Return (svg_path_or_None, advance_width) for one glyph at size `fs`."""
|
||
gn = _CMAP.get(ord(ch))
|
||
if gn is None:
|
||
return None, 0.0
|
||
s = fs / _UPM
|
||
adv = _HMTX.get(gn, (0, 0))[0] * s
|
||
pen = SVGPathPen(_GLYPH_SET)
|
||
_GLYPH_SET[gn].draw(pen)
|
||
d = pen.getCommands()
|
||
if not d:
|
||
return None, adv
|
||
t = f'translate({x:.5f},{y:.5f}) scale({s:.8f},{-s:.8f})'
|
||
return f'<path style="fill:{fill}" transform="{t}" d="{d}"/>', adv
|
||
|
||
|
||
def _glyph_ybounds(ch: str):
|
||
"""(yMin, yMax) of a glyph's ink in em units, y-up. (0, 0) if it has none."""
|
||
gn = _CMAP.get(ord(ch))
|
||
if gn is None:
|
||
return 0.0, 0.0
|
||
g = _GLYF[gn]
|
||
if g.numberOfContours == 0: # space and other empty glyphs
|
||
return 0.0, 0.0
|
||
g.recalcBounds(_GLYF)
|
||
return g.yMin / _UPM, g.yMax / _UPM
|
||
|
||
|
||
def _extract_braced(s: str, i: int):
|
||
"""s[i] == '{'; return (inner_text, index_just_after_matching_'}')."""
|
||
depth, j = 1, i + 1
|
||
while j < len(s) and depth:
|
||
if s[j] == '{':
|
||
depth += 1
|
||
elif s[j] == '}':
|
||
depth -= 1
|
||
if depth == 0:
|
||
break
|
||
j += 1
|
||
return s[i + 1:j], j + 1
|
||
|
||
|
||
def _parse_braced(inner: str):
|
||
"""A '{...}' group: a top-level '/' makes it a fraction, else a plain run."""
|
||
depth = 0
|
||
for k, ch in enumerate(inner):
|
||
if ch == '{':
|
||
depth += 1
|
||
elif ch == '}':
|
||
depth -= 1
|
||
elif ch == '/' and depth == 0:
|
||
return ('frac', _parse_markup(inner[:k]), _parse_markup(inner[k + 1:]))
|
||
return ('group', _parse_markup(inner))
|
||
|
||
|
||
def _parse_atom(s: str, i: int):
|
||
"""Argument of ^ or _: a braced group or a single character."""
|
||
if i >= len(s):
|
||
return [], i
|
||
if s[i] == '{':
|
||
inner, j = _extract_braced(s, i)
|
||
return [_parse_braced(inner)], j
|
||
return [('lit', s[i])], i + 1
|
||
|
||
|
||
def _parse_markup(s: str):
|
||
"""Parse a markup string into a flat list of nodes."""
|
||
nodes, i = [], 0
|
||
while i < len(s):
|
||
c = s[i]
|
||
if c in '^_':
|
||
atom, i = _parse_atom(s, i + 1)
|
||
nodes.append(('sup' if c == '^' else 'sub', atom))
|
||
elif c == '{':
|
||
inner, j = _extract_braced(s, i)
|
||
nodes.append(_parse_braced(inner))
|
||
i = j
|
||
else:
|
||
nodes.append(('lit', c))
|
||
i += 1
|
||
return nodes
|
||
|
||
|
||
def _measure(nodes, fs: float) -> float:
|
||
w = 0.0
|
||
for n in nodes:
|
||
if n[0] == 'lit':
|
||
gn = _CMAP.get(ord(n[1]))
|
||
if gn:
|
||
w += _HMTX.get(gn, (0, 0))[0] / _UPM * fs
|
||
elif n[0] == 'group':
|
||
w += _measure(n[1], fs)
|
||
elif n[0] in ('sup', 'sub'):
|
||
w += _measure(n[1], fs * _SUP_SCALE)
|
||
elif n[0] == 'frac':
|
||
fs2 = fs * _FRAC_SCALE
|
||
w += max(_measure(n[1], fs2), _measure(n[2], fs2)) + 2 * _FRAC_SIDE * fs2
|
||
return w
|
||
|
||
|
||
def _frac_layout(n, fs: float):
|
||
"""Fraction geometry (offsets relative to the base baseline, y-down).
|
||
|
||
Numerator and denominator are placed so their ink clears the vinculum by
|
||
`_FRAC_GAP` on each side — using the parts' real ink extents, so the gaps
|
||
hold whatever glyphs (or nested fractions) they contain.
|
||
"""
|
||
fs2 = fs * _FRAC_SCALE
|
||
axis = -_FRAC_AXIS * fs
|
||
_, num_bot = _vbounds(n[1], fs2) # numerator ink bottom, baseline-relative
|
||
num_base = axis - _FRAC_GAP * fs2 - num_bot
|
||
den_top, _ = _vbounds(n[2], fs2) # denominator ink top, baseline-relative
|
||
den_base = axis + _FRAC_GAP * fs2 - den_top
|
||
return fs2, axis, num_base, den_base
|
||
|
||
|
||
def _vbounds(nodes, fs: float):
|
||
"""(top, bottom) of the composite ink, baseline-relative, y-down (top < bottom)."""
|
||
lo, hi = math.inf, -math.inf
|
||
for n in nodes:
|
||
if n[0] == 'lit':
|
||
ymin, ymax = _glyph_ybounds(n[1])
|
||
a, b = -ymax * fs, -ymin * fs
|
||
elif n[0] == 'group':
|
||
a, b = _vbounds(n[1], fs)
|
||
elif n[0] == 'sup':
|
||
a, b = _vbounds(n[1], fs * _SUP_SCALE)
|
||
a, b = a - _SUP_RISE * fs, b - _SUP_RISE * fs
|
||
elif n[0] == 'sub':
|
||
a, b = _vbounds(n[1], fs * _SUP_SCALE)
|
||
a, b = a + _SUB_DROP * fs, b + _SUB_DROP * fs
|
||
elif n[0] == 'frac':
|
||
fs2, axis, num_base, den_base = _frac_layout(n, fs)
|
||
nt, nb = _vbounds(n[1], fs2)
|
||
dt, db = _vbounds(n[2], fs2)
|
||
a = min(nt + num_base, axis)
|
||
b = max(db + den_base, axis)
|
||
else:
|
||
continue
|
||
lo, hi = min(lo, a), max(hi, b)
|
||
return (0.0, 0.0) if lo > hi else (lo, hi)
|
||
|
||
|
||
def _draw_nodes(nodes, x: float, y: float, fs: float, fill: str):
|
||
"""Return (list_of_svg_parts, total_advance_width). y is the base baseline."""
|
||
parts, cx = [], x
|
||
for n in nodes:
|
||
if n[0] == 'lit':
|
||
p, adv = _glyph_svg(n[1], cx, y, fs, fill)
|
||
if p:
|
||
parts.append(p)
|
||
cx += adv
|
||
elif n[0] == 'group':
|
||
p, adv = _draw_nodes(n[1], cx, y, fs, fill)
|
||
parts += p
|
||
cx += adv
|
||
elif n[0] in ('sup', 'sub'):
|
||
fs2 = fs * _SUP_SCALE
|
||
y2 = y - _SUP_RISE * fs if n[0] == 'sup' else y + _SUB_DROP * fs
|
||
p, adv = _draw_nodes(n[1], cx, y2, fs2, fill)
|
||
parts += p
|
||
cx += adv
|
||
elif n[0] == 'frac':
|
||
fs2, axis, num_base, den_base = _frac_layout(n, fs)
|
||
wn, wd = _measure(n[1], fs2), _measure(n[2], fs2)
|
||
bar_w = max(wn, wd) + 2 * _FRAC_SIDE * fs2
|
||
pn, _ = _draw_nodes(n[1], cx + (bar_w - wn) / 2, y + num_base, fs2, fill)
|
||
pd, _ = _draw_nodes(n[2], cx + (bar_w - wd) / 2, y + den_base, fs2, fill)
|
||
parts += pn + pd
|
||
ay = y + axis
|
||
parts.append(
|
||
f'<line x1="{cx:.5f}" y1="{ay:.5f}" x2="{cx + bar_w:.5f}" y2="{ay:.5f}"'
|
||
f' style="stroke:{fill};stroke-width:{fs * 0.055:.5f};stroke-linecap:butt" />'
|
||
)
|
||
cx += bar_w
|
||
return parts, cx - x
|
||
|
||
|
||
def _has_markup(s: str) -> bool:
|
||
return any(c in s for c in '^_') or ('{' in s and '}' in s)
|
||
|
||
|
||
def _markup_unit_svg(unit: str, fill='#1a1a1a') -> str:
|
||
"""Render a marked-up unit, scaled to fit and centered in the unit box."""
|
||
nodes = _parse_markup(unit)
|
||
x0, x1, y0, y1 = _UNIT_BOX_X0, _UNIT_BOX_X1, _UNIT_BOX_Y0, _UNIT_BOX_Y1
|
||
xc, yc = (x0 + x1) / 2, (y0 + y1) / 2
|
||
|
||
# Fit to the box in both axes (width is horizontally condensed by SCALE_X).
|
||
w1 = _measure(nodes, 1.0)
|
||
top1, bot1 = _vbounds(nodes, 1.0)
|
||
fs = _UNIT_MAX_FS
|
||
if w1 > 0:
|
||
fs = min(fs, (x1 - x0) / (w1 * _UNIT_SCALE_X))
|
||
if bot1 - top1 > 0:
|
||
fs = min(fs, (y1 - y0) / (bot1 - top1))
|
||
|
||
# Center: baseline placed so the ink box's mid-height lands on yc; glyphs
|
||
# drawn from a natural left edge, then condensed horizontally about xc.
|
||
w = _measure(nodes, fs)
|
||
top, bot = _vbounds(nodes, fs)
|
||
y_base = yc - (top + bot) / 2
|
||
parts, _ = _draw_nodes(nodes, xc - w / 2, y_base, fs, fill)
|
||
cond = f'translate({xc:.5f},0) scale({_UNIT_SCALE_X},1) translate({-xc:.5f},0)'
|
||
return f'<g transform="{cond}">\n{chr(10).join(parts)}\n</g>'
|
||
|
||
|
||
def _text_em_width(text: str) -> float:
|
||
"""Advance width of `text` in em units, from the font's own metrics."""
|
||
return sum(
|
||
_HMTX.get(_CMAP.get(ord(ch)), (0, 0))[0]
|
||
for ch in text if _CMAP.get(ord(ch))
|
||
) / _UPM
|
||
|
||
|
||
def _unit_font_size(unit: str) -> float:
|
||
# Fit the unit's true rendered width (measuring the parsed markup, so
|
||
# super/subscripts and fractions are accounted for) into the available
|
||
# area. Rendered width at a given size is em_width * font_size * scale_x.
|
||
em_w = _measure(_parse_markup(unit), 1.0)
|
||
if em_w <= 0:
|
||
return _UNIT_MAX_FS
|
||
return min(_UNIT_MAX_FS, _UNIT_AREA_WIDTH / (em_w * _UNIT_SCALE_X))
|
||
|
||
|
||
def _fmt(v: float) -> str:
|
||
# Snap near-integers — log-scale geometric values accumulate FP error
|
||
# (e.g. 9999.9999), which would otherwise miss the integer case.
|
||
r = round(v)
|
||
if abs(v - r) < 1e-9 * max(1.0, abs(v)):
|
||
return str(int(r))
|
||
# 4 significant figures in fixed-point notation (never scientific).
|
||
exp = math.floor(math.log10(abs(v)))
|
||
decimals = max(0, 4 - 1 - exp)
|
||
s = f"{v:.{decimals}f}"
|
||
return s.rstrip('0').rstrip('.') if '.' in s else s
|
||
|
||
|
||
def _text_to_paths(text, x, y, font_size, anchor='start', fill='#1a1a1a', wrap_transform=None):
|
||
s = font_size / _UPM
|
||
|
||
if anchor == 'middle':
|
||
total_w = sum(
|
||
_HMTX.get(_CMAP.get(ord(ch)), (0, 0))[0] * s
|
||
for ch in text if _CMAP.get(ord(ch))
|
||
)
|
||
x -= total_w / 2
|
||
|
||
parts = []
|
||
cx = x
|
||
for ch in text:
|
||
gn = _CMAP.get(ord(ch))
|
||
if gn is None:
|
||
continue
|
||
pen = SVGPathPen(_GLYPH_SET)
|
||
_GLYPH_SET[gn].draw(pen)
|
||
d = pen.getCommands()
|
||
if d:
|
||
t = f'translate({cx:.5f},{y:.5f}) scale({s:.8f},{-s:.8f})'
|
||
parts.append(f'<path style="fill:{fill}" transform="{t}" d="{d}"/>')
|
||
cx += _HMTX.get(gn, (0, 0))[0] * s
|
||
|
||
inner = '\n'.join(parts)
|
||
if wrap_transform:
|
||
return f'<g transform="{wrap_transform}">{inner}</g>'
|
||
return inner
|
||
|
||
|
||
def generate_svg(unit, min_val, max_val, range_label, big_ticks, small_ticks, label_count,
|
||
use_paths=True, scale_type='linear', custom_labels=None, label_size=9):
|
||
if scale_type == 'log':
|
||
if min_val <= 0 or max_val <= 0:
|
||
raise ValueError("Logarithmic scale requires min and max values greater than 0.")
|
||
lmin, lmax = math.log(min_val), math.log(max_val)
|
||
lspan = lmax - lmin
|
||
if lspan == 0:
|
||
raise ValueError("Logarithmic scale requires min and max values to differ.")
|
||
|
||
def value_to_x(v):
|
||
return ZERO_X + SCALE_LEN * (math.log(v) - lmin) / lspan
|
||
|
||
def major_value(i):
|
||
return min_val * (max_val / min_val) ** (i / big_ticks)
|
||
|
||
elif scale_type == 'sqrt':
|
||
if min_val < 0:
|
||
raise ValueError("Square-root scale requires min value ≥ 0.")
|
||
span = max_val - min_val
|
||
if span <= 0:
|
||
raise ValueError("Square-root scale requires max value greater than min.")
|
||
|
||
def value_to_x(v):
|
||
return ZERO_X + SCALE_LEN * math.sqrt((v - min_val) / span)
|
||
|
||
def major_value(i):
|
||
return min_val + span * (i / big_ticks) ** 2
|
||
|
||
elif scale_type == 'reciprocal':
|
||
if min_val <= 0 or max_val <= 0:
|
||
raise ValueError("Reciprocal scale requires min and max values greater than 0.")
|
||
if max_val <= min_val:
|
||
raise ValueError("Reciprocal scale requires max value greater than min.")
|
||
k = 1.0 / min_val - 1.0 / max_val # always positive
|
||
|
||
def value_to_x(v):
|
||
return ZERO_X + SCALE_LEN * (1.0 / v - 1.0 / max_val) / k
|
||
|
||
def major_value(i):
|
||
return 1.0 / (1.0 / max_val + i / big_ticks * k)
|
||
|
||
else:
|
||
span = max_val - min_val
|
||
|
||
def value_to_x(v):
|
||
if span == 0:
|
||
return ZERO_X
|
||
return ZERO_X + SCALE_LEN * (v - min_val) / span
|
||
|
||
def major_value(i):
|
||
return min_val + span * i / big_ticks
|
||
|
||
big_interval = SCALE_LEN / big_ticks
|
||
# Major ticks are always physically evenly spaced; only their values differ.
|
||
big_xs = [ZERO_X + i * big_interval for i in range(big_ticks + 1)]
|
||
big_vals = [major_value(i) for i in range(big_ticks + 1)]
|
||
|
||
# Custom labels, when supplied, override the calculated numbers and set the count.
|
||
if custom_labels:
|
||
label_count = max(1, min(len(custom_labels), big_ticks + 1))
|
||
custom_labels = custom_labels[:label_count]
|
||
else:
|
||
label_count = max(2, min(label_count, big_ticks + 1))
|
||
|
||
if label_count == 1:
|
||
label_indices = [0]
|
||
else:
|
||
label_indices = [round(k * big_ticks / (label_count - 1)) for k in range(label_count)]
|
||
|
||
parts = [
|
||
'<?xml version="1.0" encoding="UTF-8" standalone="no"?>',
|
||
'<svg width="157.18373mm" height="26.683672mm"'
|
||
' viewBox="0 0 157.18373 26.683672" version="1.1"'
|
||
' xmlns="http://www.w3.org/2000/svg">',
|
||
]
|
||
|
||
if use_paths:
|
||
parts.append(' <g transform="translate(-37.352226,-90.454928)">')
|
||
else:
|
||
parts += [_FONT_FACE, ' <g transform="translate(-37.352226,-90.454928)">']
|
||
|
||
parts.append(
|
||
' <path style="fill:#ffffff;stroke:#1a1a1a;stroke-width:0.184;'
|
||
'stroke-linecap:round;stroke-miterlimit:10"'
|
||
' d="M 37.444226,90.546928 V 117.0466 H 194.44395 V 90.546928 Z'
|
||
' M 58.443978,107.54692 H 183.64409 v 6.19963 H 58.443978 Z" />'
|
||
)
|
||
|
||
# A unit with markup (super/subscripts, fractions) is a composite of glyph
|
||
# paths + a rule, so it can't be a single <text> node — render it as paths,
|
||
# scaled to fit and centered in the unit box, in both modes. A plain unit
|
||
# keeps the original baseline-anchored text/paths behaviour.
|
||
if _has_markup(unit):
|
||
unit_svg = ' ' + _markup_unit_svg(unit)
|
||
elif use_paths:
|
||
unit_svg = ' ' + _text_to_paths(
|
||
unit, 41.455711, 109.03796, _unit_font_size(unit),
|
||
wrap_transform=f'scale({_UNIT_SCALE_X},1.0364155)'
|
||
)
|
||
else:
|
||
fs = _unit_font_size(unit)
|
||
unit_svg = (
|
||
f' <text style="font-size:{fs:.4f}px;font-family:\'ГОСТ тип А\',monospace;fill:#1a1a1a"'
|
||
f' x="41.455711" y="109.03796"'
|
||
f' transform="scale({_UNIT_SCALE_X},1.0364155)">{escape(unit)}</text>'
|
||
)
|
||
|
||
if use_paths:
|
||
parts += [unit_svg, ' ' + _text_to_paths(range_label, 184.79707, 113.6755, 3.60539)]
|
||
else:
|
||
parts += [
|
||
unit_svg,
|
||
f' <text style="font-size:3.60539px;font-family:\'ГОСТ тип А\',monospace;fill:#1a1a1a"'
|
||
f' x="184.79707" y="113.6755">{escape(range_label)}</text>',
|
||
]
|
||
|
||
# Major ticks
|
||
for x in big_xs:
|
||
parts.append(
|
||
f' <line x1="{x:.5f}" y1="{BAR_Y}" x2="{x:.5f}" y2="{BAR_Y - BIG_H:.5f}"'
|
||
f' style="stroke:#1a1a1a;stroke-width:0.555;stroke-linecap:butt" />'
|
||
)
|
||
|
||
# Minor ticks — placement depends on scale type:
|
||
# linear: uniform physical spacing (= uniform value spacing)
|
||
# log: linear value interpolation between geometric major values
|
||
# (crowds toward high end of each interval)
|
||
# sqrt: sqrt of fractional position within each interval, giving
|
||
# consistent high-end crowding across all intervals; using
|
||
# value interpolation instead would concentrate the crowding
|
||
# only near zero (where sqrt is steepest) and look linear elsewhere.
|
||
if small_ticks > 0:
|
||
sub = small_ticks + 1
|
||
for i in range(big_ticks):
|
||
for j in range(1, small_ticks + 1):
|
||
if scale_type == 'sqrt':
|
||
x = big_xs[i] + (j / sub) ** 2 * (big_xs[i + 1] - big_xs[i])
|
||
else:
|
||
v = big_vals[i] + j * (big_vals[i + 1] - big_vals[i]) / sub
|
||
x = value_to_x(v)
|
||
parts.append(
|
||
f' <line x1="{x:.5f}" y1="{BAR_Y}" x2="{x:.5f}" y2="{BAR_Y - SMALL_H:.5f}"'
|
||
f' style="stroke:#1a1a1a;stroke-width:0.302;stroke-linecap:butt" />'
|
||
)
|
||
|
||
# Numeric labels
|
||
for k, idx in enumerate(label_indices):
|
||
x = big_xs[idx]
|
||
label = custom_labels[k] if custom_labels else _fmt(big_vals[idx])
|
||
if use_paths:
|
||
parts.append(' ' + _text_to_paths(label, x, 101.49598, label_size, anchor='middle'))
|
||
else:
|
||
parts.append(
|
||
f' <text style="font-size:{label_size:.5f}px;font-family:\'ГОСТ тип А\',monospace;fill:#1a1a1a"'
|
||
f' text-anchor="middle" x="{x:.5f}" y="101.49598">{escape(label)}</text>'
|
||
)
|
||
|
||
parts += [' </g>', '</svg>']
|
||
return '\n'.join(parts)
|
||
|
||
|
||
@app.route('/')
|
||
def index():
|
||
return render_template('index.html', logo_b64=_LOGO_B64, version=VERSION)
|
||
|
||
|
||
@app.route('/generate', methods=['POST'])
|
||
def generate():
|
||
unit = request.form.get('unit', '%')
|
||
min_val = float(request.form.get('min', 0))
|
||
max_val = float(request.form.get('max', 100))
|
||
range_label = request.form.get('range_label', '5mA')
|
||
big_ticks = max(1, min(50, int(request.form.get('big_ticks', 10))))
|
||
small_ticks = max(0, min(20, int(request.form.get('small_ticks', 4))))
|
||
label_count = max(2, int(request.form.get('label_count', 6)))
|
||
use_paths = request.form.get('output_mode', 'paths') == 'paths'
|
||
scale_type = request.form.get('scale_type', 'linear')
|
||
|
||
custom_labels = [s.strip() for s in request.form.get('labels', '').split(',') if s.strip()] or None
|
||
label_size = max(0.5, min(25.0, float(request.form.get('label_size', 9))))
|
||
|
||
try:
|
||
svg = generate_svg(unit, min_val, max_val, range_label, big_ticks, small_ticks,
|
||
label_count, use_paths, scale_type, custom_labels, label_size)
|
||
except ValueError as err:
|
||
return Response(str(err), status=400, mimetype='text/plain')
|
||
return Response(svg, mimetype='image/svg+xml')
|
||
|
||
|
||
if __name__ == '__main__':
|
||
app.run(debug=True)
|