563 lines
18 KiB
Python
563 lines
18 KiB
Python
"""Functions that help you work with QMK keymaps.
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"""
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import json
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import sys
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from pathlib import Path
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from subprocess import DEVNULL
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import argcomplete
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from milc import cli
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from pygments.lexers.c_cpp import CLexer
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from pygments.token import Token
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from pygments import lex
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import qmk.path
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from qmk.keyboard import find_keyboard_from_dir, rules_mk
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from qmk.errors import CppError
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# The `keymap.c` template to use when a keyboard doesn't have its own
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DEFAULT_KEYMAP_C = """#include QMK_KEYBOARD_H
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/* THIS FILE WAS GENERATED!
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*
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* This file was generated by qmk json2c. You may or may not want to
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* edit it directly.
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*/
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const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
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__KEYMAP_GOES_HERE__
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};
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"""
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def template_json(keyboard):
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"""Returns a `keymap.json` template for a keyboard.
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If a template exists in `keyboards/<keyboard>/templates/keymap.json` that text will be used instead of an empty dictionary.
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Args:
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keyboard
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The keyboard to return a template for.
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"""
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template_file = Path('keyboards/%s/templates/keymap.json' % keyboard)
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template = {'keyboard': keyboard}
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if template_file.exists():
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template.update(json.load(template_file.open(encoding='utf-8')))
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return template
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def template_c(keyboard):
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"""Returns a `keymap.c` template for a keyboard.
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If a template exists in `keyboards/<keyboard>/templates/keymap.c` that text will be used instead of an empty dictionary.
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Args:
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keyboard
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The keyboard to return a template for.
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"""
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template_file = Path('keyboards/%s/templates/keymap.c' % keyboard)
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if template_file.exists():
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template = template_file.read_text(encoding='utf-8')
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else:
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template = DEFAULT_KEYMAP_C
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return template
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def _strip_any(keycode):
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"""Remove ANY() from a keycode.
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"""
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if keycode.startswith('ANY(') and keycode.endswith(')'):
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keycode = keycode[4:-1]
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return keycode
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def find_keymap_from_dir():
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"""Returns `(keymap_name, source)` for the directory we're currently in.
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"""
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relative_cwd = qmk.path.under_qmk_firmware()
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if relative_cwd and len(relative_cwd.parts) > 1:
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# If we're in `qmk_firmware/keyboards` and `keymaps` is in our path, try to find the keyboard name.
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if relative_cwd.parts[0] == 'keyboards' and 'keymaps' in relative_cwd.parts:
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current_path = Path('/'.join(relative_cwd.parts[1:])) # Strip 'keyboards' from the front
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if 'keymaps' in current_path.parts and current_path.name != 'keymaps':
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while current_path.parent.name != 'keymaps':
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current_path = current_path.parent
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return current_path.name, 'keymap_directory'
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# If we're in `qmk_firmware/layouts` guess the name from the community keymap they're in
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elif relative_cwd.parts[0] == 'layouts' and is_keymap_dir(relative_cwd):
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return relative_cwd.name, 'layouts_directory'
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# If we're in `qmk_firmware/users` guess the name from the userspace they're in
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elif relative_cwd.parts[0] == 'users':
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# Guess the keymap name based on which userspace they're in
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return relative_cwd.parts[1], 'users_directory'
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return None, None
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def keymap_completer(prefix, action, parser, parsed_args):
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"""Returns a list of keymaps for tab completion.
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"""
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try:
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if parsed_args.keyboard:
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return list_keymaps(parsed_args.keyboard)
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keyboard = find_keyboard_from_dir()
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if keyboard:
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return list_keymaps(keyboard)
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except Exception as e:
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argcomplete.warn(f'Error: {e.__class__.__name__}: {str(e)}')
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return []
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return []
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def is_keymap_dir(keymap, c=True, json=True, additional_files=None):
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"""Return True if Path object `keymap` has a keymap file inside.
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Args:
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keymap
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A Path() object for the keymap directory you want to check.
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c
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When true include `keymap.c` keymaps.
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json
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When true include `keymap.json` keymaps.
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additional_files
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A sequence of additional filenames to check against to determine if a directory is a keymap. All files must exist for a match to happen. For example, if you want to match a C keymap with both a `config.h` and `rules.mk` file: `is_keymap_dir(keymap_dir, json=False, additional_files=['config.h', 'rules.mk'])`
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"""
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files = []
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if c:
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files.append('keymap.c')
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if json:
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files.append('keymap.json')
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for file in files:
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if (keymap / file).is_file():
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if additional_files:
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for additional_file in additional_files:
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if not (keymap / additional_file).is_file():
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return False
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return True
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def generate_json(keymap, keyboard, layout, layers):
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"""Returns a `keymap.json` for the specified keyboard, layout, and layers.
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Args:
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keymap
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A name for this keymap.
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keyboard
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The name of the keyboard.
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layout
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The LAYOUT macro this keymap uses.
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layers
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An array of arrays describing the keymap. Each item in the inner array should be a string that is a valid QMK keycode.
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"""
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new_keymap = template_json(keyboard)
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new_keymap['keymap'] = keymap
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new_keymap['layout'] = layout
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new_keymap['layers'] = layers
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return new_keymap
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def generate_c(keyboard, layout, layers):
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"""Returns a `keymap.c` or `keymap.json` for the specified keyboard, layout, and layers.
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Args:
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keyboard
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The name of the keyboard
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layout
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The LAYOUT macro this keymap uses.
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layers
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An array of arrays describing the keymap. Each item in the inner array should be a string that is a valid QMK keycode.
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"""
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new_keymap = template_c(keyboard)
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layer_txt = []
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for layer_num, layer in enumerate(layers):
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if layer_num != 0:
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layer_txt[-1] = layer_txt[-1] + ','
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layer = map(_strip_any, layer)
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layer_keys = ', '.join(layer)
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layer_txt.append('\t[%s] = %s(%s)' % (layer_num, layout, layer_keys))
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keymap = '\n'.join(layer_txt)
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new_keymap = new_keymap.replace('__KEYMAP_GOES_HERE__', keymap)
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return new_keymap
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def write_file(keymap_filename, keymap_content):
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keymap_filename.parent.mkdir(parents=True, exist_ok=True)
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keymap_filename.write_text(keymap_content)
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cli.log.info('Wrote keymap to {fg_cyan}%s', keymap_filename)
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return keymap_filename
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def write_json(keyboard, keymap, layout, layers):
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"""Generate the `keymap.json` and write it to disk.
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Returns the filename written to.
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Args:
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keyboard
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The name of the keyboard
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keymap
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The name of the keymap
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layout
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The LAYOUT macro this keymap uses.
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layers
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An array of arrays describing the keymap. Each item in the inner array should be a string that is a valid QMK keycode.
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"""
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keymap_json = generate_json(keyboard, keymap, layout, layers)
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keymap_content = json.dumps(keymap_json)
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keymap_file = qmk.path.keymap(keyboard) / keymap / 'keymap.json'
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return write_file(keymap_file, keymap_content)
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def write(keyboard, keymap, layout, layers):
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"""Generate the `keymap.c` and write it to disk.
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Returns the filename written to.
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Args:
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keyboard
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The name of the keyboard
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keymap
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The name of the keymap
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layout
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The LAYOUT macro this keymap uses.
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layers
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An array of arrays describing the keymap. Each item in the inner array should be a string that is a valid QMK keycode.
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"""
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keymap_content = generate_c(keyboard, layout, layers)
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keymap_file = qmk.path.keymap(keyboard) / keymap / 'keymap.c'
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return write_file(keymap_file, keymap_content)
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def locate_keymap(keyboard, keymap):
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"""Returns the path to a keymap for a specific keyboard.
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"""
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if not qmk.path.is_keyboard(keyboard):
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raise KeyError('Invalid keyboard: ' + repr(keyboard))
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# Check the keyboard folder first, last match wins
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checked_dirs = ''
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keymap_path = ''
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for dir in keyboard.split('/'):
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if checked_dirs:
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checked_dirs = '/'.join((checked_dirs, dir))
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else:
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checked_dirs = dir
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keymap_dir = Path('keyboards') / checked_dirs / 'keymaps'
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if (keymap_dir / keymap / 'keymap.c').exists():
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keymap_path = keymap_dir / keymap / 'keymap.c'
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if (keymap_dir / keymap / 'keymap.json').exists():
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keymap_path = keymap_dir / keymap / 'keymap.json'
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if keymap_path:
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return keymap_path
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# Check community layouts as a fallback
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rules = rules_mk(keyboard)
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if "LAYOUTS" in rules:
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for layout in rules["LAYOUTS"].split():
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community_layout = Path('layouts/community') / layout / keymap
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if community_layout.exists():
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if (community_layout / 'keymap.json').exists():
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return community_layout / 'keymap.json'
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if (community_layout / 'keymap.c').exists():
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return community_layout / 'keymap.c'
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def list_keymaps(keyboard, c=True, json=True, additional_files=None, fullpath=False):
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"""List the available keymaps for a keyboard.
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Args:
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keyboard
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The keyboards full name with vendor and revision if necessary, example: clueboard/66/rev3
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c
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When true include `keymap.c` keymaps.
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json
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When true include `keymap.json` keymaps.
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additional_files
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A sequence of additional filenames to check against to determine if a directory is a keymap. All files must exist for a match to happen. For example, if you want to match a C keymap with both a `config.h` and `rules.mk` file: `is_keymap_dir(keymap_dir, json=False, additional_files=['config.h', 'rules.mk'])`
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fullpath
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When set to True the full path of the keymap relative to the `qmk_firmware` root will be provided.
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Returns:
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a sorted list of valid keymap names.
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"""
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# parse all the rules.mk files for the keyboard
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rules = rules_mk(keyboard)
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names = set()
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if rules:
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keyboards_dir = Path('keyboards')
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kb_path = keyboards_dir / keyboard
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# walk up the directory tree until keyboards_dir
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# and collect all directories' name with keymap.c file in it
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while kb_path != keyboards_dir:
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keymaps_dir = kb_path / "keymaps"
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if keymaps_dir.is_dir():
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for keymap in keymaps_dir.iterdir():
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if is_keymap_dir(keymap, c, json, additional_files):
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keymap = keymap if fullpath else keymap.name
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names.add(keymap)
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kb_path = kb_path.parent
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# if community layouts are supported, get them
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if "LAYOUTS" in rules:
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for layout in rules["LAYOUTS"].split():
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cl_path = Path('layouts/community') / layout
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if cl_path.is_dir():
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for keymap in cl_path.iterdir():
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if is_keymap_dir(keymap, c, json, additional_files):
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keymap = keymap if fullpath else keymap.name
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names.add(keymap)
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return sorted(names)
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def _c_preprocess(path, stdin=DEVNULL):
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""" Run a file through the C pre-processor
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Args:
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path: path of the keymap.c file (set None to use stdin)
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stdin: stdin pipe (e.g. sys.stdin)
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Returns:
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the stdout of the pre-processor
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"""
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cmd = ['cpp', str(path)] if path else ['cpp']
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pre_processed_keymap = cli.run(cmd, stdin=stdin)
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if 'fatal error' in pre_processed_keymap.stderr:
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for line in pre_processed_keymap.stderr.split('\n'):
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if 'fatal error' in line:
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raise (CppError(line))
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return pre_processed_keymap.stdout
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def _get_layers(keymap): # noqa C901 : until someone has a good idea how to simplify/split up this code
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""" Find the layers in a keymap.c file.
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Args:
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keymap: the content of the keymap.c file
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Returns:
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a dictionary containing the parsed keymap
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"""
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layers = list()
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opening_braces = '({['
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closing_braces = ')}]'
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keymap_certainty = brace_depth = 0
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is_keymap = is_layer = is_adv_kc = False
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layer = dict(name=False, layout=False, keycodes=list())
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for line in lex(keymap, CLexer()):
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if line[0] is Token.Name:
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if is_keymap:
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# If we are inside the keymap array
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# we know the keymap's name and the layout macro will come,
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# followed by the keycodes
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if not layer['name']:
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if line[1].startswith('LAYOUT') or line[1].startswith('KEYMAP'):
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# This can happen if the keymap array only has one layer,
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# for macropads and such
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layer['name'] = '0'
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layer['layout'] = line[1]
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else:
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layer['name'] = line[1]
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elif not layer['layout']:
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layer['layout'] = line[1]
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elif is_layer:
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# If we are inside a layout macro,
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# collect all keycodes
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if line[1] == '_______':
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kc = 'KC_TRNS'
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elif line[1] == 'XXXXXXX':
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kc = 'KC_NO'
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else:
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kc = line[1]
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if is_adv_kc:
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# If we are inside an advanced keycode
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# collect everything and hope the user
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# knew what he/she was doing
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layer['keycodes'][-1] += kc
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else:
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layer['keycodes'].append(kc)
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# The keymaps array's signature:
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# const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS]
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#
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# Only if we've found all 6 keywords in this specific order
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# can we know for sure that we are inside the keymaps array
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elif line[1] == 'PROGMEM' and keymap_certainty == 2:
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keymap_certainty = 3
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elif line[1] == 'keymaps' and keymap_certainty == 3:
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keymap_certainty = 4
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elif line[1] == 'MATRIX_ROWS' and keymap_certainty == 4:
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keymap_certainty = 5
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elif line[1] == 'MATRIX_COLS' and keymap_certainty == 5:
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keymap_certainty = 6
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elif line[0] is Token.Keyword:
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if line[1] == 'const' and keymap_certainty == 0:
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keymap_certainty = 1
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elif line[0] is Token.Keyword.Type:
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if line[1] == 'uint16_t' and keymap_certainty == 1:
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keymap_certainty = 2
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elif line[0] is Token.Punctuation:
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if line[1] in opening_braces:
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brace_depth += 1
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if is_keymap:
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if is_layer:
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# We found the beginning of a non-basic keycode
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is_adv_kc = True
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layer['keycodes'][-1] += line[1]
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elif line[1] == '(' and brace_depth == 2:
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# We found the beginning of a layer
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is_layer = True
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elif line[1] == '{' and keymap_certainty == 6:
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# We found the beginning of the keymaps array
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is_keymap = True
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elif line[1] in closing_braces:
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brace_depth -= 1
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if is_keymap:
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if is_adv_kc:
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layer['keycodes'][-1] += line[1]
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if brace_depth == 2:
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# We found the end of a non-basic keycode
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is_adv_kc = False
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elif line[1] == ')' and brace_depth == 1:
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# We found the end of a layer
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is_layer = False
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layers.append(layer)
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layer = dict(name=False, layout=False, keycodes=list())
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elif line[1] == '}' and brace_depth == 0:
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# We found the end of the keymaps array
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is_keymap = False
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keymap_certainty = 0
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elif is_adv_kc:
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# Advanced keycodes can contain other punctuation
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# e.g.: MT(MOD_LCTL | MOD_LSFT, KC_ESC)
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layer['keycodes'][-1] += line[1]
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elif line[0] is Token.Literal.Number.Integer and is_keymap and not is_adv_kc:
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# If the pre-processor finds the 'meaning' of the layer names,
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# they will be numbers
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if not layer['name']:
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layer['name'] = line[1]
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else:
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# We only care about
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# operators and such if we
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# are inside an advanced keycode
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# e.g.: MT(MOD_LCTL | MOD_LSFT, KC_ESC)
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if is_adv_kc:
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layer['keycodes'][-1] += line[1]
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return layers
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def parse_keymap_c(keymap_file, use_cpp=True):
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""" Parse a keymap.c file.
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Currently only cares about the keymaps array.
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Args:
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|
keymap_file: path of the keymap.c file (or '-' to use stdin)
|
|
|
|
use_cpp: if True, pre-process the file with the C pre-processor
|
|
|
|
Returns:
|
|
a dictionary containing the parsed keymap
|
|
"""
|
|
if keymap_file == '-':
|
|
if use_cpp:
|
|
keymap_file = _c_preprocess(None, sys.stdin)
|
|
else:
|
|
keymap_file = sys.stdin.read()
|
|
else:
|
|
if use_cpp:
|
|
keymap_file = _c_preprocess(keymap_file)
|
|
else:
|
|
keymap_file = keymap_file.read_text(encoding='utf-8')
|
|
|
|
keymap = dict()
|
|
keymap['layers'] = _get_layers(keymap_file)
|
|
return keymap
|
|
|
|
|
|
def c2json(keyboard, keymap, keymap_file, use_cpp=True):
|
|
""" Convert keymap.c to keymap.json
|
|
|
|
Args:
|
|
keyboard: The name of the keyboard
|
|
|
|
keymap: The name of the keymap
|
|
|
|
layout: The LAYOUT macro this keymap uses.
|
|
|
|
keymap_file: path of the keymap.c file
|
|
|
|
use_cpp: if True, pre-process the file with the C pre-processor
|
|
|
|
Returns:
|
|
a dictionary in keymap.json format
|
|
"""
|
|
keymap_json = parse_keymap_c(keymap_file, use_cpp)
|
|
|
|
dirty_layers = keymap_json.pop('layers', None)
|
|
keymap_json['layers'] = list()
|
|
for layer in dirty_layers:
|
|
layer.pop('name')
|
|
layout = layer.pop('layout')
|
|
if not keymap_json.get('layout', False):
|
|
keymap_json['layout'] = layout
|
|
keymap_json['layers'].append(layer.pop('keycodes'))
|
|
|
|
keymap_json['keyboard'] = keyboard
|
|
keymap_json['keymap'] = keymap
|
|
return keymap_json
|