87 lines
2.6 KiB
Python
87 lines
2.6 KiB
Python
# SPDX-License-Identifier: LGPL-3.0-or-later
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"""QPL (Qt Property Language) theme files to QML converter.
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QPL is a custom configuration format currently used for theme files.
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This is a big hack and will be replaced in the future by a standard language.
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"""
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import re
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from typing import Generator
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PROPERTY_TYPES = {"bool", "double", "int", "list", "real", "string", "url",
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"var", "date", "point", "rect", "size", "color"}
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def _add_property(line: str) -> str:
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"""Return a QML property declaration line from a QPL property line."""
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if re.match(r"^\s*[a-zA-Z\d_]+\s*:$", line):
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return re.sub(r"^(\s*)(\S*\s*):$",
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r"\1readonly property QtObject \2: QtObject",
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line)
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types = "|".join(PROPERTY_TYPES)
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if re.match(fr"^\s*({types}) [a-zA-Z\d_]+\s*:", line):
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return re.sub(r"^(\s*)(\S*)", r"\1property \2", line)
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return line
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def _process_lines(content: str) -> Generator[str, None, None]:
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"""Yield lines of real QML from lines of QPL."""
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skip = False
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indent = " " * 4
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current_indent = 0
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for line in content.split("\n"):
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line = line.rstrip()
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if not line.strip() or line.strip().startswith("//"):
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continue
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start_space_list = re.findall(r"^ +", line)
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start_space = start_space_list[0] if start_space_list else ""
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line_indents = len(re.findall(indent, start_space))
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if not skip:
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if line_indents > current_indent:
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yield "%s{" % (indent * current_indent)
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current_indent = line_indents
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while line_indents < current_indent:
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current_indent -= 1
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yield "%s}" % (indent * current_indent)
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line = _add_property(line)
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yield line
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skip = any((line.endswith(e) for e in "([{+\\,?:"))
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while current_indent:
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current_indent -= 1
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yield "%s}" % (indent * current_indent)
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def convert_to_qml(theme_content: str) -> str:
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"""Return valid QML code with imports from QPL content."""
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theme_content = theme_content.replace("\t", " ")
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lines = [
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"import QtQuick 2.12",
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'import "../Base"',
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"QtObject {",
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" function hsluv(h, s, l, a) { return utils.hsluv(h, s, l, a) }",
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" function hsl(h, s, l) { return utils.hsl(h, s, l) }",
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" function hsla(h, s, l, a) { return utils.hsla(h, s, l, a) }",
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" id: theme",
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]
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lines += [f" {line}" for line in _process_lines(theme_content)]
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lines += ["}"]
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return "\n".join(lines)
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