commit db6129d356f5234a659f27b76d353a1823e56aee
Author: jan <jan@orange.mpxd.net>
Date:   Tue Feb 20 22:23:20 2024 -0800

    initial commit

diff --git a/k2t.py b/k2t.py
new file mode 100644
index 0000000..cb8abad
--- /dev/null
+++ b/k2t.py
@@ -0,0 +1,334 @@
+from typing import Self, Type, Any
+import tomllib
+from dataclasses import dataclass, fields
+from xml.etree import ElementTree
+
+
+@dataclass(slots=True)
+class Entry:
+    name: str
+    source: str | None
+    frame_color: str | None
+    fill_color: str | None
+
+    members: list | None = None
+    expanded: bool = False
+
+    dither_pattern: str = 'C1'
+    line_style: str = 'C0'
+    frame_brightness: int = 0
+    fill_brightness: int = 0
+    width: int = 1
+    animation: int = 0
+
+    valid: bool = True
+    visible: bool = True
+    transparent: bool = False
+    marked: bool = False
+    xfill: bool = False
+
+    @classmethod
+    def from_xml(cls: Type[Self], el: ElementTree.Element) -> Self:
+        assert el.tag in ('properties', 'group-members')
+
+        members = []
+        args: dict[str, Any] = {
+            'frame_color': None,
+            'fill_color': None,
+            'source': None,
+            }
+        for child in el:
+            if not child.text:
+                continue
+
+            tag = child.tag
+            dtag = tag.replace('-', '_')
+            if tag in ('frame-color', 'fill-color'):
+                args[dtag] = child.text[1:]
+            elif tag in ('dither-pattern', 'line-style', 'source', 'name'):
+                args[dtag] = child.text
+            elif tag in ('valid', 'visible', 'transparent', 'marked', 'xfill', 'expanded'):
+                val = {
+                    'false': False,
+                    'true': True,
+                    }[child.text.lower()]
+                args[tag] = val
+            elif tag in ('frame-brightness', 'fill-brightness', 'width', 'animation'):
+                args[dtag] = int(child.text)
+            elif tag == 'group-members':
+                members.append(Entry.from_xml(child))
+            else:
+                raise Exception(f'Unexpected tag: {child.tag}')
+
+        if not members:
+            members = None
+
+        return cls(members=members, **args)
+
+    def to_xml(self, is_member: bool = False) -> ElementTree.Element:
+        main_tag = 'group-members' if is_member else 'properties'
+        el = ElementTree.Element(main_tag)
+        for field in fields(self):
+            val = getattr(self, field.name)
+            if val is None or field.name == 'members':
+                continue
+
+            if (val == field.default
+                and (field not in ('dither-pattern', 'line-style')
+                    or self.source is None
+                    )):
+                continue
+
+            tag = field.name.replace('_', '-')
+            if tag in ('frame-color', 'fill-color'):
+                val = '#' + val
+            if not isinstance(val, str):
+                val = str(val).lower()
+            el2 = ElementTree.Element(tag)
+            el2.text = val
+            el.append(el2)
+
+        if self.members:
+            for member in self.members:
+                el.append(member.to_xml(is_member=True))
+
+        return el
+
+    def to_toml(self, depth: int = 0) -> str:
+        parts = ('layers',) + ('members',) * depth
+
+        s = '[[' + '.'.join(parts)  + ']]\n'
+        for field in fields(self):
+            val = getattr(self, field.name)
+            if val == field.default or val is None:
+                continue
+
+            if isinstance(val, str):
+                vstr = '"' + toml_escape(val) + '"'
+            elif isinstance(val, bool):
+                vstr = str(val).lower()
+            elif isinstance(val, int):
+                vstr = str(val)
+
+            key = field.name.replace('_', '-')
+            s += f'{key} = {vstr}\n'
+
+        s += '\n'
+
+        if self.members:
+            for member in self.members:
+                s += member.to_toml(depth + 1)
+
+        return s
+
+    @classmethod
+    def from_toml(cls: Type[Self], tree: dict) -> Self:
+        members = []
+        args: dict[str, Any] = {
+            'frame_color': None,
+            'fill_color': None,
+            'source': None,
+            }
+        for key, val in tree.items():
+            if key != 'members':
+                args[key.replace('-', '_')] = val
+
+        if 'members' in tree:
+            for child in tree['members']:
+                members.append(Entry.from_toml(child))
+
+        if not members:
+            members = None
+
+        return cls(members=members, **args)
+
+
+@dataclass(slots=True)
+class Pattern:
+    pattern: str              # 2D,  Nx8 or Nx16 or Nx32
+    name: str | None = None
+    order: int | None = None
+
+    @classmethod
+    def from_xml(cls: Type[Self], el: ElementTree.Element) -> Self:
+        assert el.tag == 'custom-dither-pattern'
+
+        lines = []
+        args: dict[str, Any] = {}
+        for child in el:
+            if not child.text:
+                continue
+
+            tag = child.tag
+            if tag == 'name':
+                args[tag] = child.text
+            elif tag == 'order':
+                args[tag] = int(child.text)
+            elif tag == 'pattern':
+                for line in child:
+                    assert line.tag == 'line'
+                    assert line.text is not None
+                    lines.append(line.text)
+            else:
+                raise Exception(f'Unexpected tag: {tag}')
+
+        if not lines:
+            raise Exception('No pattern found in custom-dither-pattern!')
+        pattern = '\n'.join(lines)
+
+        return cls(pattern=pattern, **args)
+
+    def to_xml(self) -> ElementTree.Element:
+        el = ElementTree.Element('custom-dither-pattern')
+        if self.name is not None:
+            el2 = ElementTree.Element('name')
+            el2.text = self.name
+            el.append(el2)
+        if self.order is not None:
+            el2 = ElementTree.Element('order')
+            el2.text = str(self.order)
+            el.append(el2)
+
+        pat = ElementTree.Element('pattern')
+        for line in self.pattern.strip().split('\n'):
+            el2 = ElementTree.Element('line')
+            el2.text = line
+            pat.append(el2)
+        el.append(pat)
+
+        return el
+
+    def to_toml(self) -> str:
+        s = '[[patterns]]\n'
+        if self.name is not None:
+            s += f'name = "{toml_escape(self.name)}"\n'
+        if self.order is not None:
+            s += f'order = {self.order}\n'
+
+        s += 'pattern = """\n'
+        s += self.pattern + '"""\n\n'
+
+        return s
+
+    @classmethod
+    def from_toml(cls: Type[Self], tree: dict) -> Self:
+        lines = tree['pattern'].split('\n')
+        n_px = len(lines[0])
+        assert all(len(line) == n_px for line in lines[1:])
+        return cls(**tree)
+
+
+@dataclass(slots=True)
+class LineStyle:
+    pattern: str               # 1D, up to 32 values
+    name: str | None = None
+    order: int | None = None
+
+    @classmethod
+    def from_xml(cls: Type[Self], el: ElementTree.Element) -> Self:
+        assert el.tag == 'custom-line-style'
+
+        args: dict[str, Any] = {}
+        for child in el:
+            if not child.text:
+                continue
+
+            tag = child.tag
+            if tag in ('name', 'pattern'):
+                args[tag] = child.text
+            elif tag == 'order':
+                args[tag] = int(child.text)
+            else:
+                raise Exception(f'Unexpected tag: {tag}')
+        return cls(**args)
+
+    def to_xml(self) -> ElementTree.Element:
+        el = ElementTree.Element('custom-line-style')
+        if self.name is not None:
+            el2 = ElementTree.Element('name')
+            el2.text = self.name
+            el.append(el2)
+        if self.order is not None:
+            el2 = ElementTree.Element('order')
+            el2.text = str(self.order)
+            el.append(el2)
+        el2 = ElementTree.Element('pattern')
+        el2.text = self.pattern
+        el.append(el2)
+        return el
+
+    def to_toml(self) -> str:
+        s = '[[linestyles]]\n'
+        if self.name is not None:
+            s += f'name = "{toml_escape(self.name)}"\n'
+        if self.order is not None:
+            s += f'order = {self.order}\n'
+        s += f'pattern = "{self.pattern}"\n\n'
+        return s
+
+    @classmethod
+    def from_toml(cls: Type[Self], tree: dict) -> Self:
+        assert len(tree['pattern']) <= 32
+        return cls(**tree)
+
+
+def k2t(kfile: str, tfile: str) -> None:
+    tree = ElementTree.parse(kfile)
+    root = tree.getroot()
+
+    assert root.tag == 'layer-properties'
+    name = None
+    entries = []
+    patterns = []
+    linestyles = []
+    for child in root:
+        if child.tag == 'custom-dither-pattern':
+            patterns.append(Pattern.from_xml(child))
+        elif child.tag == 'custom-line-style':
+            linestyles.append(LineStyle.from_xml(child))
+        elif child.tag == 'properties':
+            entries.append(Entry.from_xml(child))
+        elif child.tag == 'name':
+            name = child.text
+        else:
+            raise Exception(f'Unexpected tag: {child.tag}')
+
+    if name is not None:
+        print(f'Discarding tab name: {name}')
+
+    with open(tfile, 'wt') as ff:
+        for entry in entries:
+            ff.write(entry.to_toml())
+        for pattern in patterns:
+            ff.write(pattern.to_toml())
+        for linestyle in linestyles:
+            ff.write(linestyle.to_toml())
+
+
+def t2k(tfile: str, kfile: str) -> None:
+    root = ElementTree.Element('layer-properties')
+
+    with open(tfile, 'rb') as ff:
+        ttree = tomllib.load(ff)
+
+    entries = [Entry.from_toml(entry)
+               for entry in ttree['layers']]
+    patterns = [Pattern.from_toml(pat)
+                for pat in ttree['patterns']]
+    linestyles = [LineStyle.from_toml(ls)
+                  for ls in ttree['linestyles']]
+
+    for entry in entries:
+        root.append(entry.to_xml())
+    for pattern in patterns:
+        root.append(pattern.to_xml())
+    for linestyle in linestyles:
+        root.append(linestyle.to_xml())
+
+    ktree = ElementTree.ElementTree(root)
+    ElementTree.indent(ktree)
+    ktree.write(kfile)
+
+
+def toml_escape(string: str) -> str:
+    return string.replace('\\', '\\\\').replace('"', '\\"')