920 lines
33 KiB
Python
920 lines
33 KiB
Python
import os
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import sys
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import re
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import argparse
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from pathlib import Path
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from xml.etree import ElementTree as ET
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_SCRIPTS_DIR = Path(__file__).resolve().parents[1]
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if str(_SCRIPTS_DIR) not in sys.path:
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sys.path.insert(0, str(_SCRIPTS_DIR))
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from console_encoding import configure_utf8_stdio # noqa: E402
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configure_utf8_stdio()
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SVG_NS = "http://www.w3.org/2000/svg"
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NSMAP = {"svg": SVG_NS}
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# Ensure pretty element names without ns0 prefix on write
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ET.register_namespace("", SVG_NS)
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TEXT_STYLE_ATTRS = {
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# common text styling
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"font-family",
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"font-size",
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"font-weight",
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"font-style",
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"font-variant",
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"font-stretch",
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"letter-spacing",
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"word-spacing",
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"kerning",
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"text-anchor",
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"text-decoration",
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"dominant-baseline",
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"writing-mode",
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"direction",
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# color/paint
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"fill",
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"fill-opacity",
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"stroke",
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"stroke-width",
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"stroke-opacity",
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"opacity",
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"paint-order",
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# transforms/filters
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"transform",
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"clip-path",
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"filter",
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}
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num_re = re.compile(r"^[\s,]*([+-]?(?:\d+\.?\d*|\d*\.\d+))")
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def parse_first_number(val: str | None) -> float | None:
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"""Parse the first numeric token from an SVG attribute value."""
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if val is None:
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return None
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m = num_re.match(val)
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if not m:
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return None
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try:
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return float(m.group(1))
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except ValueError:
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return None
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def format_number(n: float | None) -> str | None:
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"""Format a float for compact SVG attribute output."""
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if n is None:
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return None
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if abs(n - round(n)) < 1e-6:
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return str(int(round(n)))
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# Trim trailing zeros
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s = f"{n:.6f}".rstrip("0").rstrip(".")
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return s
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def parse_style(style_str: str | None) -> dict[str, str]:
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"""Parse an inline SVG style string into a mapping."""
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out: dict[str, str] = {}
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if not style_str:
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return out
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# split by ; and then :
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for chunk in style_str.split(";"):
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if not chunk.strip():
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continue
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if ":" in chunk:
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k, v = chunk.split(":", 1)
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out[k.strip()] = v.strip()
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return out
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def style_to_string(style_map: dict[str, str]) -> str:
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"""Serialize a style mapping back into an inline SVG style string."""
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if not style_map:
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return ""
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return ";".join(f"{k}:{v}" for k, v in style_map.items())
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def merge_styles(parent_style: str | None, child_style: str | None) -> str:
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"""Merge parent and child inline styles, preferring child values."""
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p = parse_style(parent_style)
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c = parse_style(child_style)
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p.update(c) # child overrides
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return style_to_string(p)
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def get_attr(elem: ET.Element | None, name: str, default: str | None = None) -> str | None:
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"""Read an attribute from an element with a default fallback."""
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return elem.get(name) if elem is not None and name in elem.attrib else default
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def compute_line_positions(
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text_el: ET.Element,
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tspan_el: ET.Element,
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cur_x: float | None,
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cur_y: float | None,
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) -> tuple[float | None, float | None]:
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"""
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Compute absolute x,y for a tspan based on parent <text> current baseline and tspan's x/y/dx/dy.
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Returns (new_x, new_y).
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"""
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del text_el
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t_x_attr = get_attr(tspan_el, "x")
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t_y_attr = get_attr(tspan_el, "y")
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t_dx_attr = get_attr(tspan_el, "dx")
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t_dy_attr = get_attr(tspan_el, "dy")
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nx = parse_first_number(t_x_attr) if t_x_attr is not None else cur_x
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if t_dx_attr is not None:
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dx = parse_first_number(t_dx_attr) or 0.0
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nx = (nx or 0.0) + dx
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ny = parse_first_number(t_y_attr) if t_y_attr is not None else cur_y
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if t_dy_attr is not None:
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dy = parse_first_number(t_dy_attr) or 0.0
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ny = (ny or 0.0) + dy
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return nx, ny
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def collect_text_content(el: ET.Element) -> str:
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"""Collect all text content from an element subtree."""
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# Gather all text within the element (flatten nested tspans if any)
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parts = []
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for s in el.itertext():
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if s:
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parts.append(s)
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return "".join(parts)
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def _has_non_xml_whitespace(text: str | None) -> bool:
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"""Return whether text contains content beyond XML layout whitespace."""
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return bool(text and text.strip(" \t\r\n"))
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def copy_text_attrs(
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src_el: ET.Element,
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dst_el: ET.Element,
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exclude: set[str] | None = None,
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) -> None:
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"""Copy shared text styling attributes between SVG text elements."""
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exclude = exclude or set()
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# Copy style string first
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if "style" in src_el.attrib and "style" not in exclude:
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dst_el.set("style", src_el.attrib["style"])
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for k in TEXT_STYLE_ATTRS:
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if k in exclude:
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continue
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v = src_el.get(k)
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if v is not None:
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dst_el.set(k, v)
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# xml:space preservation
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xml_space = src_el.get("{http://www.w3.org/XML/1998/namespace}space")
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if xml_space is not None and "{http://www.w3.org/XML/1998/namespace}space" not in exclude:
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dst_el.set("{http://www.w3.org/XML/1998/namespace}space", xml_space)
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PARAGRAPH_MARK_ATTR = "data-paragraph-line-height"
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PARAGRAPH_SPACE_BEFORE_ATTR = "data-paragraph-space-before"
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# Marks a line-break tspan as a SOFT break inside the current paragraph
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# (SVG used dy to simulate text wrapping; the downstream converter should
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# merge its runs into the previous <a:p> rather than start a new one).
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PARAGRAPH_SOFT_BREAK_ATTR = "data-paragraph-soft-break"
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# Marks an authored visual line boundary that remains a hard DrawingML break
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# in the default single-frame preserve mode.
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PARAGRAPH_LINE_BREAK_ATTR = "data-paragraph-line-break"
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# Tolerance for detecting "base line-height" vs "paragraph gap": dy values
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# within ±DY_TOLERANCE_PX of each other are considered the same line-height.
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DY_TOLERANCE_PX = 0.5
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# Cap on dy / base ratio. Anything beyond this (e.g. a 5x gap) is rejected
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# as a real section break that shouldn't merge into one text frame.
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MAX_DY_MULTIPLIER = 3.0
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LIST_MARKER_RE = re.compile(
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r"^\s*(?:[•·・]\s*|[-–—*]\s+|\d+[.)、]\s+|[（(]\d+[）)]\s*)\S+"
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)
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def _starts_with_list_marker(line_group: list[ET.Element]) -> bool:
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"""Return True when a visual line starts with an ordered/unordered marker."""
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text = "".join(collect_text_content(tspan) for tspan in line_group)
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return bool(LIST_MARKER_RE.match(text))
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def _positional_tspan_attribute(tspan: ET.Element) -> str | None:
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"""Return the unsupported nested position attribute, if any."""
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for name in ("x", "y"):
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if tspan.get(name) is not None:
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return name
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raw_dy = tspan.get("dy")
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dy = parse_first_number(raw_dy) if raw_dy is not None else None
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if dy is not None and abs(dy) > 1e-6:
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return "dy"
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return None
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def nested_positional_tspan_errors(root: ET.Element) -> list[str]:
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"""Describe nested tspans whose baseline jumps cannot be exported."""
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errors: list[str] = []
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for text_el in root.iter(f"{{{SVG_NS}}}text"):
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text_label = (
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f"<text id={text_el.get('id')!r}>"
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if text_el.get("id")
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else "<text>"
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)
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for direct_child in list(text_el):
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if direct_child.tag != f"{{{SVG_NS}}}tspan":
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continue
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for descendant in direct_child.iter(f"{{{SVG_NS}}}tspan"):
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if descendant is direct_child:
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continue
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attribute = _positional_tspan_attribute(descendant)
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if attribute is None:
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continue
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errors.append(
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f"{text_label} contains a nested <tspan> with {attribute}; "
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"move x/y/non-zero dy to a direct child of <text>"
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)
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return errors
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def _build_paragraph_child_view(
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text_el: ET.Element,
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is_svg_tag,
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) -> tuple[list[ET.Element], ET.Element | None] | None:
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"""Return direct tspan children plus an optional synthetic leading line.
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The synthetic line lets paragraph classification accept common SVG
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authoring where the first visual line is direct text under <text>. This
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helper does not mutate the tree; _emit_mergeable_paragraph commits the
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synthetic line only after all paragraph checks pass.
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"""
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direct_children = list(text_el)
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direct_tspans = [c for c in direct_children if is_svg_tag(c, "tspan")]
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if len(direct_tspans) != len(direct_children):
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return None
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raw_lead = text_el.text or ""
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synthetic_first: ET.Element | None = None
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if raw_lead.strip():
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base_x_raw = get_attr(text_el, "x")
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if base_x_raw is None:
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return None
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if any((child.tail or "").strip() for child in direct_tspans):
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return None
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synthetic_first = ET.Element(f"{{{SVG_NS}}}tspan")
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synthetic_first.set("x", base_x_raw)
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synthetic_first.text = raw_lead.lstrip()
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view = ([synthetic_first] if synthetic_first is not None else []) + direct_tspans
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return view, synthetic_first
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def _get_font_size_px(elem: ET.Element) -> float | None:
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"""Read font-size from an attribute or inline style."""
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size = parse_first_number(get_attr(elem, "font-size"))
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if size is not None:
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return size
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style_size = parse_style(get_attr(elem, "style")).get("font-size")
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return parse_first_number(style_size)
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def _effective_line_font_size_px(
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text_el: ET.Element,
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line_group: list[ET.Element],
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) -> float:
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"""Return the positioned line starter's effective font size."""
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line_size = _get_font_size_px(line_group[0])
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if line_size is not None:
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return line_size
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parent_size = _get_font_size_px(text_el)
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return parent_size if parent_size is not None else 16.0
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def _classify_paragraph_block(
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text_el: ET.Element,
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is_svg_tag,
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is_new_line_tspan,
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preserve_line_breaks: bool,
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) -> tuple[float, list[float], list[str], list[list[ET.Element]], ET.Element | None] | None:
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"""Detect a mergeable paragraph block.
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Returns ``(base_line_height_px, extra_space_before_px_per_line,
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break_kind_per_line, line_groups, synthetic_first_line)`` if the children
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form a mergeable paragraph. Each list has one entry per direct-child tspan
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(line), including a synthetic first line when the source used leading text:
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- extra_space_before_px_per_line[i]: extra px above base line-height,
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used as <a:spcBef> on the downstream <a:p>. First entry is 0.
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- break_kind_per_line[i]: ``paragraph`` starts a fresh <a:p>, ``soft``
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joins the previous line for reflow, and ``line`` preserves the visual
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boundary as a hard DrawingML break. First entry is ``paragraph``.
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Conditions (all must hold):
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- No direct text under <text>, except simple leading text that can be
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promoted into a synthetic first-line <tspan>.
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- Every direct child is a <tspan>.
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- Every logical line starts with a new-line tspan.
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- Direct-child inline formatting tspans without x/y/dy are allowed only
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after a line starts; they are normalized into the previous line.
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- First line-break tspan has dy == 0 (or no dy).
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- All subsequent line-break tspans use positive dy (no <y>).
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- dy values cluster around a single minimum "base line-height";
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any larger dy must be ≤ MAX_DY_MULTIPLIER × base. Anything larger
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is treated as a section break and rejected.
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- Every line-break tspan that sets x repeats the parent <text>'s x.
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- A line-break tspan cannot add a non-zero dx offset.
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- No nested tspan inside any line carries x/y/non-zero dy.
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- Adjacent lines with different effective font sizes start new paragraphs.
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"""
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base_x = parse_first_number(get_attr(text_el, "x"))
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child_view = _build_paragraph_child_view(text_el, is_svg_tag)
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if child_view is None:
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return None
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direct_tspans, synthetic_first = child_view
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if len(direct_tspans) < 2:
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return None
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line_groups: list[list[ET.Element]] = []
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for tspan in direct_tspans:
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if is_new_line_tspan(tspan):
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line_groups.append([tspan])
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else:
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if not line_groups:
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return None
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line_groups[-1].append(tspan)
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if len(line_groups) < 2:
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return None
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# First pass: validate per-line structural rules and collect dy values.
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dy_values: list[float] = [] # one per line (0 for first)
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for idx, group in enumerate(line_groups):
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tspan = group[0]
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t_y = get_attr(tspan, "y")
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if t_y is not None:
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return None
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t_x_raw = get_attr(tspan, "x")
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if t_x_raw is not None:
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t_x = parse_first_number(t_x_raw)
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if base_x is None or t_x is None or abs(t_x - base_x) > 1e-6:
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return None
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t_dx_raw = get_attr(tspan, "dx")
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t_dx = parse_first_number(t_dx_raw) if t_dx_raw is not None else None
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if t_dx is not None and abs(t_dx) > 1e-6:
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return None
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t_dy_raw = get_attr(tspan, "dy")
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t_dy = parse_first_number(t_dy_raw) if t_dy_raw is not None else None
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if idx == 0:
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if t_dy is not None and abs(t_dy) > 1e-6:
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return None
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dy_values.append(0.0)
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else:
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if t_dy is None or t_dy <= 0:
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return None
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dy_values.append(t_dy)
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# Second pass: pick the base line-height as the minimum positive dy and
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# express each line's dy as base + extra space-before.
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positive_dys = [d for d in dy_values[1:] if d > 0]
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if not positive_dys:
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return None
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base = min(positive_dys)
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font_size = _get_font_size_px(text_el)
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if font_size is not None and base > font_size * MAX_DY_MULTIPLIER + DY_TOLERANCE_PX:
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return None
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extras: list[float] = [0.0] # first line never has space-before
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break_kinds = ["paragraph"]
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line_font_sizes = [
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_effective_line_font_size_px(text_el, group)
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for group in line_groups
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]
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for idx, d in enumerate(dy_values[1:], start=1):
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if d + DY_TOLERANCE_PX < base:
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return None # below base — line overlap, not a paragraph
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if d > base * MAX_DY_MULTIPLIER + DY_TOLERANCE_PX:
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return None # gap too large — treat as section break
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extra = d - base
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if extra < 0:
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extra = 0.0
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# dy at the base line-height = soft break (SVG was simulating wrap);
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# dy strictly greater than base = hard paragraph break. List markers
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# and font-size changes also start a fresh paragraph so semantically
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# distinct visual lines do not merge into one PowerPoint line.
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reflow_candidate = (
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abs(extra) <= DY_TOLERANCE_PX
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and not _starts_with_list_marker(line_groups[idx])
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and abs(line_font_sizes[idx] - line_font_sizes[idx - 1]) <= 1e-6
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)
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explicit_soft_break = line_groups[idx][0].get(
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PARAGRAPH_SOFT_BREAK_ATTR
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)
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if explicit_soft_break == "0":
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break_kind = "paragraph"
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elif explicit_soft_break == "1":
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break_kind = "soft"
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elif reflow_candidate:
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break_kind = "line" if preserve_line_breaks else "soft"
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else:
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break_kind = "paragraph"
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extras.append(0.0 if break_kind != "paragraph" else extra)
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break_kinds.append(break_kind)
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return base, extras, break_kinds, line_groups, synthetic_first
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def _emit_mergeable_paragraph(
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text_el: ET.Element,
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base_dy: float,
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extras: list[float],
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break_kinds: list[str],
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line_groups: list[list[ET.Element]],
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synthetic_first: ET.Element | None = None,
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) -> None:
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"""Rewrite text_el in place so it stays a single <text> with paragraph rows.
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The base line-height goes on the parent <text> via PARAGRAPH_MARK_ATTR.
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Each direct-child tspan is normalized: x/y/dx/dy stripped; inline-run
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styling and nested tspans are preserved. Per-tspan attrs:
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- PARAGRAPH_SOFT_BREAK_ATTR="1" on tspans that should be appended to
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the previous <a:p> downstream (SVG used dy to simulate wrap)
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- PARAGRAPH_LINE_BREAK_ATTR="1" on tspans that retain an authored line
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boundary inside the previous <a:p>
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- PARAGRAPH_SPACE_BEFORE_ATTR on tspans that open a new paragraph
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with an extra gap (omitted when 0)
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"""
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text_el.set(PARAGRAPH_MARK_ATTR, format_number(base_dy))
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if synthetic_first is not None:
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text_el.text = None
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text_el.insert(0, synthetic_first)
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# Normalize authoring variants before the downstream converter reads the
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# paragraph: a line-break tspan may be followed by direct-child inline
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# formatting tspans. Wrap those original siblings in one unstyled line
|
||
# container so every direct child of <text> is one logical visual line.
|
||
# Keeping the authored runs as siblings is important: nesting later runs
|
||
# under the positioned first run would incorrectly inherit its typography,
|
||
# and moving them independently would lose the first run's tail whitespace.
|
||
normalized_lines: list[ET.Element] = []
|
||
for group in line_groups:
|
||
line = group[0]
|
||
if len(group) == 1:
|
||
normalized_lines.append(line)
|
||
continue
|
||
|
||
container = ET.Element(f"{{{SVG_NS}}}tspan")
|
||
for k in ("x", "y", "dx", "dy"):
|
||
line.attrib.pop(k, None)
|
||
for run in group:
|
||
container.append(run)
|
||
normalized_lines.append(container)
|
||
|
||
for child in list(text_el):
|
||
text_el.remove(child)
|
||
for line in normalized_lines:
|
||
text_el.append(line)
|
||
|
||
extras_iter = iter(extras)
|
||
break_iter = iter(break_kinds)
|
||
for tspan in normalized_lines:
|
||
for k in ("x", "y", "dx", "dy"):
|
||
if k in tspan.attrib:
|
||
del tspan.attrib[k]
|
||
for k in (
|
||
PARAGRAPH_SOFT_BREAK_ATTR,
|
||
PARAGRAPH_LINE_BREAK_ATTR,
|
||
PARAGRAPH_SPACE_BEFORE_ATTR,
|
||
):
|
||
tspan.attrib.pop(k, None)
|
||
try:
|
||
extra = next(extras_iter)
|
||
break_kind = next(break_iter)
|
||
except StopIteration:
|
||
extra = 0.0
|
||
break_kind = "paragraph"
|
||
if break_kind == "soft":
|
||
tspan.set(PARAGRAPH_SOFT_BREAK_ATTR, "1")
|
||
elif break_kind == "line":
|
||
tspan.set(PARAGRAPH_LINE_BREAK_ATTR, "1")
|
||
elif extra > 1e-6:
|
||
tspan.set(PARAGRAPH_SPACE_BEFORE_ATTR, format_number(extra))
|
||
|
||
|
||
def flatten_text_with_tspans(
|
||
tree: ET.ElementTree,
|
||
merge_paragraphs: bool = False,
|
||
preserve_line_breaks: bool = False,
|
||
) -> bool:
|
||
"""Flatten multi-line tspan text into independent text nodes when needed.
|
||
|
||
When ``merge_paragraphs`` is True, mergeable paragraph blocks (same x,
|
||
dy clustered around one base line-height) are kept as a single <text>.
|
||
``preserve_line_breaks`` marks ordinary visual rows as hard line breaks
|
||
instead of reflowable continuations. Default split behavior still promotes
|
||
every positioned row to its own <text>.
|
||
"""
|
||
root = tree.getroot()
|
||
positional_errors = nested_positional_tspan_errors(root)
|
||
if positional_errors:
|
||
preview = "; ".join(positional_errors[:3])
|
||
suffix = (
|
||
""
|
||
if len(positional_errors) <= 3
|
||
else f"; +{len(positional_errors) - 3} more"
|
||
)
|
||
raise ValueError(f"Unsupported nested positional <tspan>: {preview}{suffix}")
|
||
parent_map = {c: p for p in root.iter() for c in p}
|
||
changed = False
|
||
|
||
def is_svg_tag(el: ET.Element, name: str) -> bool:
|
||
return el.tag == f"{{{SVG_NS}}}{name}"
|
||
|
||
def is_new_line_tspan(tspan: ET.Element) -> bool:
|
||
"""Determine whether a tspan represents a new line (has its own y or non-zero dy)."""
|
||
t_dy_attr = get_attr(tspan, "dy")
|
||
t_y_attr = get_attr(tspan, "y")
|
||
t_x_attr = get_attr(tspan, "x")
|
||
dy_val = parse_first_number(t_dy_attr) if t_dy_attr is not None else None
|
||
# Has its own y attribute, or has non-zero dy, or has its own x attribute (indicating a new line)
|
||
if t_y_attr is not None:
|
||
return True
|
||
if dy_val is not None and dy_val != 0:
|
||
return True
|
||
# If tspan has an x attribute and there are preceding sibling tspans, treat it as a new line
|
||
if t_x_attr is not None:
|
||
return True
|
||
return False
|
||
|
||
# Collect candidates first to avoid modifying while iterating
|
||
candidates = []
|
||
for el in root.iter():
|
||
if is_svg_tag(el, "text"):
|
||
has_tspan_child = any(is_svg_tag(c, "tspan") for c in list(el))
|
||
if has_tspan_child:
|
||
candidates.append(el)
|
||
|
||
for text_el in candidates:
|
||
parent = parent_map.get(text_el)
|
||
if parent is None:
|
||
continue
|
||
|
||
# First check whether any tspan needs flattening (dy != 0 or has its own y attribute)
|
||
needs_flatten = False
|
||
for child in list(text_el):
|
||
if not is_svg_tag(child, "tspan"):
|
||
continue
|
||
if is_new_line_tspan(child):
|
||
needs_flatten = True
|
||
break
|
||
|
||
# If no tspan needs a line break, skip the entire text element
|
||
if not needs_flatten:
|
||
continue
|
||
|
||
# Single-frame fast path: conservative same-x/dy blocks stay in one
|
||
# <text>. The downstream converter either preserves visual breaks or
|
||
# reflows them. Split mode promotes each positioned line to <text>.
|
||
if merge_paragraphs:
|
||
paragraph = _classify_paragraph_block(
|
||
text_el,
|
||
is_svg_tag,
|
||
is_new_line_tspan,
|
||
preserve_line_breaks,
|
||
)
|
||
if paragraph is not None:
|
||
base_dy, extras, break_kinds, line_groups, synthetic_first = paragraph
|
||
_emit_mergeable_paragraph(
|
||
text_el,
|
||
base_dy,
|
||
extras,
|
||
break_kinds,
|
||
line_groups,
|
||
synthetic_first=synthetic_first,
|
||
)
|
||
changed = True
|
||
continue
|
||
|
||
base_x = parse_first_number(get_attr(text_el, "x")) or 0.0
|
||
base_y = parse_first_number(get_attr(text_el, "y")) or 0.0
|
||
cur_x, cur_y = base_x, base_y
|
||
|
||
new_texts = []
|
||
|
||
# Collect tspan elements belonging to the same line
|
||
current_line_tspans = []
|
||
current_line_lead_text = text_el.text or None
|
||
|
||
for idx, child in enumerate(list(text_el)):
|
||
if not is_svg_tag(child, "tspan"):
|
||
continue
|
||
|
||
content = collect_text_content(child)
|
||
|
||
# Check whether this tspan starts a new line
|
||
if is_new_line_tspan(child):
|
||
# Save previously accumulated same-line tspans first
|
||
if current_line_tspans or _has_non_xml_whitespace(
|
||
current_line_lead_text
|
||
):
|
||
ne = _create_text_element_from_line(
|
||
text_el, current_line_lead_text, current_line_tspans, cur_x, cur_y
|
||
)
|
||
new_texts.append(ne)
|
||
current_line_tspans = []
|
||
current_line_lead_text = None
|
||
|
||
# Update position
|
||
nx, ny = compute_line_positions(text_el, child, cur_x, cur_y)
|
||
cur_x, cur_y = nx, ny
|
||
|
||
# Keep raw XML whitespace and tails until the shared downstream
|
||
# text normalizer sees the whole line. A whitespace-only run can
|
||
# still be the visible boundary between two formatted runs.
|
||
if content or child.tail:
|
||
current_line_tspans.append(child)
|
||
|
||
# Process the last line
|
||
if current_line_tspans or _has_non_xml_whitespace(
|
||
current_line_lead_text
|
||
):
|
||
ne = _create_text_element_from_line(
|
||
text_el, current_line_lead_text, current_line_tspans, cur_x, cur_y
|
||
)
|
||
new_texts.append(ne)
|
||
|
||
if new_texts:
|
||
# Replace original <text> with the list of new <text> nodes
|
||
try:
|
||
idx = list(parent).index(text_el)
|
||
except ValueError:
|
||
idx = None
|
||
|
||
# Insert in place to preserve drawing order
|
||
for i, ne in enumerate(new_texts):
|
||
if idx is not None:
|
||
parent.insert(idx + i, ne)
|
||
else:
|
||
parent.append(ne)
|
||
|
||
# Remove the original <text>
|
||
parent.remove(text_el)
|
||
changed = True
|
||
|
||
return changed
|
||
|
||
|
||
def _has_tspan_children(elem: ET.Element) -> bool:
|
||
"""Return True if elem contains any nested <tspan> children (inline runs)."""
|
||
return any(c.tag == f"{{{SVG_NS}}}tspan" for c in list(elem))
|
||
|
||
|
||
def _copy_inline_tspan(src: ET.Element, strip_line_attrs: bool) -> ET.Element:
|
||
"""Deep-copy a tspan as an inline run, preserving nested tspan structure, head text, and tail text.
|
||
|
||
When strip_line_attrs is True, x/y/dy are dropped because the enclosing
|
||
<text> owns the resolved line position. Drop dx only from a positioned
|
||
line starter, where compute_line_positions already consumed it; preserve
|
||
dx on later inline runs.
|
||
Nested tspans are copied recursively without stripping (they are already inline-only).
|
||
"""
|
||
new = ET.Element(f"{{{SVG_NS}}}tspan")
|
||
consumed_dx = (
|
||
strip_line_attrs
|
||
and _positional_tspan_attribute(src) is not None
|
||
)
|
||
for k, v in src.attrib.items():
|
||
if strip_line_attrs and k in ("x", "y", "dy"):
|
||
continue
|
||
if k == "dx" and consumed_dx:
|
||
continue
|
||
new.set(k, v)
|
||
new.text = src.text
|
||
for child in list(src):
|
||
if child.tag == f"{{{SVG_NS}}}tspan":
|
||
new.append(_copy_inline_tspan(child, strip_line_attrs=False))
|
||
new.tail = src.tail
|
||
return new
|
||
|
||
|
||
def _create_text_element_from_line(
|
||
text_el: ET.Element,
|
||
lead_text: str | None,
|
||
tspans: list[ET.Element],
|
||
x: float | None,
|
||
y: float | None,
|
||
) -> ET.Element:
|
||
"""
|
||
Create a text element from a line's content (may contain leading text and multiple tspans).
|
||
If there is only one tspan with no nested tspan children and no leading text, the line
|
||
collapses to a plain <text>...</text>. Otherwise the tspan structure (including any
|
||
nested inline tspans) is preserved so per-run formatting survives the flatten step.
|
||
"""
|
||
ne = ET.Element(f"{{{SVG_NS}}}text")
|
||
|
||
# Copy attrs from parent <text>
|
||
copy_text_attrs(text_el, ne, exclude={"x", "y"})
|
||
ne.set("x", format_number(x))
|
||
ne.set("y", format_number(y))
|
||
|
||
# Transform
|
||
p_tf = text_el.get("transform")
|
||
if p_tf:
|
||
ne.set("transform", p_tf)
|
||
|
||
# Compact path: a single tspan with no nested inline runs or parent-owned
|
||
# tail collapses to <text>text</text>. A tail must remain outside the tspan
|
||
# so its parent typography and xml:space semantics remain intact.
|
||
if (
|
||
not lead_text
|
||
and len(tspans) == 1
|
||
and not _has_tspan_children(tspans[0])
|
||
and not tspans[0].tail
|
||
):
|
||
tspan = tspans[0]
|
||
content = collect_text_content(tspan)
|
||
|
||
xml_space_attr = "{http://www.w3.org/XML/1998/namespace}space"
|
||
xml_space = tspan.get(xml_space_attr)
|
||
if xml_space is not None:
|
||
ne.set(xml_space_attr, xml_space)
|
||
|
||
# Merge style
|
||
merged_style = merge_styles(text_el.get("style"), tspan.get("style"))
|
||
if merged_style:
|
||
ne.set("style", merged_style)
|
||
|
||
# Override specific attributes from tspan
|
||
for attr in TEXT_STYLE_ATTRS:
|
||
cv = tspan.get(attr)
|
||
if cv is not None:
|
||
ne.set(attr, cv)
|
||
|
||
# Combine transform
|
||
c_tf = tspan.get("transform")
|
||
if p_tf and c_tf:
|
||
ne.set("transform", f"{p_tf} {c_tf}")
|
||
elif c_tf:
|
||
ne.set("transform", c_tf)
|
||
|
||
ne.text = content
|
||
else:
|
||
# Preserve tspan structure, including nested inline tspans and tail text
|
||
if lead_text:
|
||
ne.text = lead_text
|
||
|
||
for tspan in tspans:
|
||
ne.append(_copy_inline_tspan(tspan, strip_line_attrs=True))
|
||
|
||
return ne
|
||
|
||
|
||
def process_svg_file(
|
||
src_path: str,
|
||
dst_path: str,
|
||
merge_paragraphs: bool = False,
|
||
) -> bool:
|
||
"""Flatten eligible tspan lines in one SVG file."""
|
||
try:
|
||
tree = ET.parse(src_path)
|
||
except ET.ParseError as e:
|
||
print(f"[WARN] Failed to parse {src_path}: {e}")
|
||
return False
|
||
|
||
changed = flatten_text_with_tspans(tree, merge_paragraphs=merge_paragraphs)
|
||
|
||
# Ensure destination directory exists
|
||
os.makedirs(os.path.dirname(dst_path), exist_ok=True)
|
||
|
||
# Write out XML without XML declaration to mimic input style
|
||
tree.write(dst_path, encoding="utf-8", xml_declaration=False, method="xml")
|
||
return changed
|
||
|
||
|
||
def _compute_default_out_base(inp: str) -> str:
|
||
"""Compute default output path for directory or file input."""
|
||
if os.path.isdir(inp):
|
||
# Default: if input ends with svg_output, use sibling svg_output_flattext;
|
||
# otherwise append _flattext to the directory name at the same level.
|
||
head, tail = os.path.split(os.path.normpath(inp))
|
||
if tail == "svg_output":
|
||
return os.path.join(head, "svg_output_flattext")
|
||
return inp.rstrip("/\\") + "_flattext"
|
||
else:
|
||
base, ext = os.path.splitext(inp)
|
||
return base + "_flattext" + ext
|
||
|
||
|
||
def _interactive_get_paths() -> tuple[str | None, str | None]:
|
||
"""
|
||
Interactive mode: prompt the user for input path (SVG file or directory)
|
||
and optional output path. Returns (inp, out_base) or (None, None) if cancelled.
|
||
"""
|
||
print("[Interactive mode] No arguments provided; running interactively.")
|
||
print("Please enter the path to process (SVG file or directory containing SVGs).")
|
||
print("Enter q to quit.\n")
|
||
|
||
while True:
|
||
raw = input("Input path (file/dir): ").strip()
|
||
if raw.lower() in {"q", "quit", "exit"} or raw == "":
|
||
return None, None
|
||
inp = os.path.expanduser(raw)
|
||
if os.path.exists(inp):
|
||
break
|
||
print("Path does not exist. Please re-enter or enter q to quit.")
|
||
|
||
default_out = _compute_default_out_base(inp)
|
||
if os.path.isdir(inp):
|
||
prompt = f"Output directory [default: {default_out}]: "
|
||
else:
|
||
prompt = f"Output file [default: {default_out}]: "
|
||
|
||
raw_out = input(prompt).strip()
|
||
out_base = os.path.expanduser(raw_out) if raw_out else default_out
|
||
|
||
return inp, out_base
|
||
|
||
|
||
def main() -> None:
|
||
"""Run the CLI entry point."""
|
||
# CLI parsing with optional interactive mode
|
||
parser = argparse.ArgumentParser(
|
||
description="Flatten <tspan> lines into multiple <text> nodes for better compatibility.",
|
||
add_help=True,
|
||
)
|
||
parser.add_argument("input", nargs="?", help="Input path: SVG file or directory")
|
||
parser.add_argument("output", nargs="?", help="Optional output file/dir")
|
||
parser.add_argument(
|
||
"-i",
|
||
"--interactive",
|
||
action="store_true",
|
||
help="Run in interactive prompt mode to input paths",
|
||
)
|
||
parser.add_argument(
|
||
"--merge-paragraphs",
|
||
action="store_true",
|
||
default=False,
|
||
help=(
|
||
"Opt-in: merge mergeable paragraph blocks (same x, dy clustered "
|
||
"around one base line-height) into a single <text> annotated for "
|
||
"downstream multi-<a:p> conversion. Default off — every line-break "
|
||
"tspan becomes its own <text>, preserving SVG pixel fidelity."
|
||
),
|
||
)
|
||
|
||
args = parser.parse_args()
|
||
|
||
if args.interactive or not args.input:
|
||
inp, out_base = _interactive_get_paths()
|
||
if not inp:
|
||
print("Cancelled. Usage: python3 scripts/svg_finalize/flatten_tspan.py <input_dir_or_svg> [output_dir]")
|
||
sys.exit(0)
|
||
else:
|
||
inp = args.input
|
||
out_base = args.output
|
||
|
||
if os.path.isdir(inp):
|
||
# If output base not provided, create a sibling folder named svg_output_flattext for svg_output
|
||
if out_base is None:
|
||
out_base = _compute_default_out_base(inp)
|
||
|
||
total = 0
|
||
changed_count = 0
|
||
out_base_abs = os.path.abspath(out_base)
|
||
for root, dirs, files in os.walk(inp):
|
||
# Avoid recursing into the output directory when it lives under input
|
||
dirs[:] = [d for d in dirs if os.path.abspath(os.path.join(root, d)) != out_base_abs]
|
||
rel_root = os.path.relpath(root, inp)
|
||
for f in files:
|
||
if not f.lower().endswith(".svg"):
|
||
continue
|
||
src = os.path.join(root, f)
|
||
dst = os.path.join(out_base, rel_root, f) if rel_root != "." else os.path.join(out_base, f)
|
||
total += 1
|
||
changed = process_svg_file(src, dst, merge_paragraphs=args.merge_paragraphs)
|
||
if changed:
|
||
changed_count += 1
|
||
print(f"Processed {total} SVG(s). With <tspan> flattened: {changed_count}.")
|
||
print(f"Output written to: {out_base}")
|
||
else:
|
||
src = inp
|
||
if out_base is None:
|
||
out_base = _compute_default_out_base(src)
|
||
changed = process_svg_file(src, out_base, merge_paragraphs=args.merge_paragraphs)
|
||
print(f"Written: {out_base} (flattened: {changed})")
|
||
|
||
|
||
if __name__ == "__main__":
|
||
main()
|