74 lines
2.1 KiB
Python
74 lines
2.1 KiB
Python
# htmlcc - Statically compiled HTML templates for C
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# Copyright (C) 2025 Lee Yingtong Li
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <https://www.gnu.org/licenses/>.
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class Emitter:
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"""Base class for emitters"""
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def emit(self, s: str) -> None:
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print(s)
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def emit_raw_c(self, raw_c: str) -> None:
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"""Emit raw C code"""
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self.emit(raw_c)
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def emit_preamble(self) -> None:
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"""Emit the preamble for the output file"""
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return
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def output_literal_string(self, literal_string: str) -> None:
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"""Emit code to output a literal string"""
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raise NotImplementedError()
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def output_variable_as_attr(self, variable: str) -> None:
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"""Emit code to output a variable, escaping for HTML text"""
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raise NotImplementedError()
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def output_variable_as_text(self, variable: str) -> None:
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"""Emit code to output a variable, escaping for HTML text"""
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raise NotImplementedError()
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def start_page(self, page_name: str) -> None:
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"""Called at {% page ... %}"""
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self.emit('void ' + page_name + '(void) {')
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def end_page(self) -> None:
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"""Called at {% endpage %}"""
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self.emit('}')
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# Utility functions
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@staticmethod
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def escape_cstr(s: str) -> str:
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"""Escape the string as a C string, wrapping with `"` character"""
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s = s.replace('\\', '\\\\')
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s = s.replace('"', '\\"')
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s = s.replace('\n', '\\n')
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return f'"{s}"'
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# Known emitter registry
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known_emitters = {}
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def register_emitter(name: str, emitter: type[Emitter]) -> None:
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known_emitters[name] = emitter
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