Data driven `g_led_config` (#16728)

7 files changed, 303 insertions, 4 deletions

diff --git a/builddefs/build_keyboard.mk b/builddefs/build_keyboard.mk
index 4503f018a8..dc86b232df 100644
--- a/builddefs/build_keyboard.mk
+++ b/builddefs/build_keyboard.mk
@@ -322,12 +322,18 @@ ifneq ("$(wildcard $(KEYBOARD_PATH_5)/info.json)","")
 endif
 
 CONFIG_H += $(KEYBOARD_OUTPUT)/src/info_config.h $(KEYBOARD_OUTPUT)/src/layouts.h
+KEYBOARD_SRC += $(KEYBOARD_OUTPUT)/src/default_keyboard.c
 
 $(KEYBOARD_OUTPUT)/src/info_config.h: $(INFO_JSON_FILES)
 	@$(SILENT) || printf "$(MSG_GENERATING) $@" | $(AWK_CMD)
 	$(eval CMD=$(QMK_BIN) generate-config-h --quiet --keyboard $(KEYBOARD) --output $(KEYBOARD_OUTPUT)/src/info_config.h)
 	@$(BUILD_CMD)
 
+$(KEYBOARD_OUTPUT)/src/default_keyboard.c: $(INFO_JSON_FILES)
+	@$(SILENT) || printf "$(MSG_GENERATING) $@" | $(AWK_CMD)
+	$(eval CMD=$(QMK_BIN) generate-keyboard-c --quiet --keyboard $(KEYBOARD) --output $(KEYBOARD_OUTPUT)/src/default_keyboard.c)
+	@$(BUILD_CMD)
+
 $(KEYBOARD_OUTPUT)/src/default_keyboard.h: $(INFO_JSON_FILES)
 	@$(SILENT) || printf "$(MSG_GENERATING) $@" | $(AWK_CMD)
 	$(eval CMD=$(QMK_BIN) generate-keyboard-h --quiet --keyboard $(KEYBOARD) --output $(KEYBOARD_OUTPUT)/src/default_keyboard.h)
@@ -338,7 +344,7 @@ $(KEYBOARD_OUTPUT)/src/layouts.h: $(INFO_JSON_FILES)
 	$(eval CMD=$(QMK_BIN) generate-layouts --quiet --keyboard $(KEYBOARD) --output $(KEYBOARD_OUTPUT)/src/layouts.h)
 	@$(BUILD_CMD)
 
-generated-files: $(KEYBOARD_OUTPUT)/src/info_config.h $(KEYBOARD_OUTPUT)/src/default_keyboard.h $(KEYBOARD_OUTPUT)/src/layouts.h
+generated-files: $(KEYBOARD_OUTPUT)/src/info_config.h $(KEYBOARD_OUTPUT)/src/default_keyboard.c $(KEYBOARD_OUTPUT)/src/default_keyboard.h $(KEYBOARD_OUTPUT)/src/layouts.h
 
 .INTERMEDIATE : generated-files
 
diff --git a/data/schemas/keyboard.jsonschema b/data/schemas/keyboard.jsonschema
index aaf6f887d5..ba1a6b6cc9 100644
--- a/data/schemas/keyboard.jsonschema
+++ b/data/schemas/keyboard.jsonschema
@@ -212,6 +212,62 @@
                 "timeout": {"$ref": "qmk.definitions.v1#/unsigned_int"}
             }
         },
+        "led_matrix": {
+            "type": "object",
+            "properties": {
+                "driver": {"type": "string"},
+                "layout": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "additionalProperties": false,
+                        "properties": {
+                            "matrix": {
+                                "type": "array",
+                                "minItems": 2,
+                                "maxItems": 2,
+                                "items": {
+                                    "type": "number",
+                                    "min": 0,
+                                    "multipleOf": 1
+                                }
+                            },
+                            "x": {"$ref": "qmk.definitions.v1#/key_unit"},
+                            "y": {"$ref": "qmk.definitions.v1#/key_unit"},
+                            "flags": {"$ref": "qmk.definitions.v1#/unsigned_decimal"}
+                        }
+                    }
+                }
+            }
+        },
+        "rgb_matrix": {
+            "type": "object",
+            "properties": {
+                "driver": {"type": "string"},
+                "layout": {
+                    "type": "array",
+                    "items": {
+                        "type": "object",
+                        "additionalProperties": false,
+                        "properties": {
+                            "matrix": {
+                                "type": "array",
+                                "minItems": 2,
+                                "maxItems": 2,
+                                "items": {
+                                    "type": "number",
+                                    "min": 0,
+                                    "multipleOf": 1
+                                }
+                            },
+                            "x": {"$ref": "qmk.definitions.v1#/key_unit"},
+                            "y": {"$ref": "qmk.definitions.v1#/key_unit"},
+                            "flags": {"$ref": "qmk.definitions.v1#/unsigned_decimal"}
+                        }
+                    }
+                }
+            }
+        },
         "rgblight": {
             "type": "object",
             "additionalProperties": false,
diff --git a/lib/python/qmk/c_parse.py b/lib/python/qmk/c_parse.py
index 72be690019..359aaccbbc 100644
--- a/lib/python/qmk/c_parse.py
+++ b/lib/python/qmk/c_parse.py
@@ -1,5 +1,9 @@
 """Functions for working with config.h files.
 """
+from pygments.lexers.c_cpp import CLexer
+from pygments.token import Token
+from pygments import lex
+from itertools import islice
 from pathlib import Path
 import re
 
@@ -13,6 +17,13 @@ multi_comment_regex = re.compile(r'/\*(.|\n)*?\*/', re.MULTILINE)
 layout_macro_define_regex = re.compile(r'^#\s*define')
 
 
+def _get_chunks(it, size):
+    """Break down a collection into smaller parts
+    """
+    it = iter(it)
+    return iter(lambda: tuple(islice(it, size)), ())
+
+
 def strip_line_comment(string):
     """Removes comments from a single line string.
     """
@@ -170,3 +181,110 @@ def _parse_matrix_locations(matrix, file, macro_name):
                 matrix_locations[identifier] = [row_num, col_num]
 
     return matrix_locations
+
+
+def _coerce_led_token(_type, value):
+    """ Convert token to valid info.json content
+    """
+    value_map = {
+        'NO_LED': None,
+        'LED_FLAG_ALL': 0xFF,
+        'LED_FLAG_NONE': 0x00,
+        'LED_FLAG_MODIFIER': 0x01,
+        'LED_FLAG_UNDERGLOW': 0x02,
+        'LED_FLAG_KEYLIGHT': 0x04,
+        'LED_FLAG_INDICATOR': 0x08,
+    }
+    if _type is Token.Literal.Number.Integer:
+        return int(value)
+    if _type is Token.Literal.Number.Float:
+        return float(value)
+    if _type is Token.Literal.Number.Hex:
+        return int(value, 0)
+    if _type is Token.Name and value in value_map.keys():
+        return value_map[value]
+
+
+def _parse_led_config(file, matrix_cols, matrix_rows):
+    """Return any 'raw' led/rgb matrix config
+    """
+    file_contents = file.read_text(encoding='utf-8')
+    file_contents = comment_remover(file_contents)
+    file_contents = file_contents.replace('\\\n', '')
+
+    matrix_raw = []
+    position_raw = []
+    flags = []
+
+    found_led_config = False
+    bracket_count = 0
+    section = 0
+    for _type, value in lex(file_contents, CLexer()):
+        # Assume g_led_config..stuff..;
+        if value == 'g_led_config':
+            found_led_config = True
+        elif value == ';':
+            found_led_config = False
+        elif found_led_config:
+            # Assume bracket count hints to section of config we are within
+            if value == '{':
+                bracket_count += 1
+                if bracket_count == 2:
+                    section += 1
+            elif value == '}':
+                bracket_count -= 1
+            else:
+                # Assume any non whitespace value here is important enough to stash
+                if _type in [Token.Literal.Number.Integer, Token.Literal.Number.Float, Token.Literal.Number.Hex, Token.Name]:
+                    if section == 1 and bracket_count == 3:
+                        matrix_raw.append(_coerce_led_token(_type, value))
+                    if section == 2 and bracket_count == 3:
+                        position_raw.append(_coerce_led_token(_type, value))
+                    if section == 3 and bracket_count == 2:
+                        flags.append(_coerce_led_token(_type, value))
+
+    # Slightly better intrim format
+    matrix = list(_get_chunks(matrix_raw, matrix_cols))
+    position = list(_get_chunks(position_raw, 2))
+    matrix_indexes = list(filter(lambda x: x is not None, matrix_raw))
+
+    # If we have not found anything - bail
+    if not section:
+        return None
+
+    # TODO: Improve crude parsing/validation
+    if len(matrix) != matrix_rows and len(matrix) != (matrix_rows / 2):
+        raise ValueError("Unable to parse g_led_config matrix data")
+    if len(position) != len(flags):
+        raise ValueError("Unable to parse g_led_config position data")
+    if len(matrix_indexes) and (max(matrix_indexes) >= len(flags)):
+        raise ValueError("OOB within g_led_config matrix data")
+
+    return (matrix, position, flags)
+
+
+def find_led_config(file, matrix_cols, matrix_rows):
+    """Search file for led/rgb matrix config
+    """
+    found = _parse_led_config(file, matrix_cols, matrix_rows)
+    if not found:
+        return None
+
+    # Expand collected content
+    (matrix, position, flags) = found
+
+    # Align to output format
+    led_config = []
+    for index, item in enumerate(position, start=0):
+        led_config.append({
+            'x': item[0],
+            'y': item[1],
+            'flags': flags[index],
+        })
+    for r in range(len(matrix)):
+        for c in range(len(matrix[r])):
+            index = matrix[r][c]
+            if index is not None:
+                led_config[index]['matrix'] = [r, c]
+
+    return led_config
diff --git a/lib/python/qmk/cli/__init__.py b/lib/python/qmk/cli/__init__.py
index 85baa238a8..d7192631a3 100644
--- a/lib/python/qmk/cli/__init__.py
+++ b/lib/python/qmk/cli/__init__.py
@@ -52,6 +52,7 @@ subcommands = [
     'qmk.cli.generate.dfu_header',
     'qmk.cli.generate.docs',
     'qmk.cli.generate.info_json',
+    'qmk.cli.generate.keyboard_c',
     'qmk.cli.generate.keyboard_h',
     'qmk.cli.generate.layouts',
     'qmk.cli.generate.rgb_breathe_table',
diff --git a/lib/python/qmk/cli/generate/keyboard_c.py b/lib/python/qmk/cli/generate/keyboard_c.py
new file mode 100755
index 0000000000..a9b742f323
--- /dev/null
+++ b/lib/python/qmk/cli/generate/keyboard_c.py
@@ -0,0 +1,75 @@
+"""Used by the make system to generate keyboard.c from info.json.
+"""
+from milc import cli
+
+from qmk.info import info_json
+from qmk.commands import dump_lines
+from qmk.keyboard import keyboard_completer, keyboard_folder
+from qmk.path import normpath
+from qmk.constants import GPL2_HEADER_C_LIKE, GENERATED_HEADER_C_LIKE
+
+
+def _gen_led_config(info_data):
+    """Convert info.json content to g_led_config
+    """
+    cols = info_data['matrix_size']['cols']
+    rows = info_data['matrix_size']['rows']
+
+    config_type = None
+    if 'layout' in info_data.get('rgb_matrix', {}):
+        config_type = 'rgb_matrix'
+    elif 'layout' in info_data.get('led_matrix', {}):
+        config_type = 'led_matrix'
+
+    lines = []
+    if not config_type:
+        return lines
+
+    matrix = [['NO_LED'] * cols for i in range(rows)]
+    pos = []
+    flags = []
+
+    led_config = info_data[config_type]['layout']
+    for index, item in enumerate(led_config, start=0):
+        if 'matrix' in item:
+            (x, y) = item['matrix']
+            matrix[x][y] = str(index)
+        pos.append(f'{{ {item.get("x", 0)},{item.get("y", 0)} }}')
+        flags.append(str(item.get('flags', 0)))
+
+    if config_type == 'rgb_matrix':
+        lines.append('#ifdef RGB_MATRIX_ENABLE')
+        lines.append('#include "rgb_matrix.h"')
+    elif config_type == 'led_matrix':
+        lines.append('#ifdef LED_MATRIX_ENABLE')
+        lines.append('#include "led_matrix.h"')
+
+    lines.append('__attribute__ ((weak)) led_config_t g_led_config = {')
+    lines.append('  {')
+    for line in matrix:
+        lines.append(f'    {{ {",".join(line)} }},')
+    lines.append('  },')
+    lines.append(f'  {{ {",".join(pos)} }},')
+    lines.append(f'  {{ {",".join(flags)} }},')
+    lines.append('};')
+    lines.append('#endif')
+
+    return lines
+
+
+@cli.argument('-o', '--output', arg_only=True, type=normpath, help='File to write to')
+@cli.argument('-q', '--quiet', arg_only=True, action='store_true', help="Quiet mode, only output error messages")
+@cli.argument('-kb', '--keyboard', arg_only=True, type=keyboard_folder, completer=keyboard_completer, required=True, help='Keyboard to generate keyboard.c for.')
+@cli.subcommand('Used by the make system to generate keyboard.c from info.json', hidden=True)
+def generate_keyboard_c(cli):
+    """Generates the keyboard.h file.
+    """
+    kb_info_json = info_json(cli.args.keyboard)
+
+    # Build the layouts.h file.
+    keyboard_h_lines = [GPL2_HEADER_C_LIKE, GENERATED_HEADER_C_LIKE, '#include QMK_KEYBOARD_H', '']
+
+    keyboard_h_lines.extend(_gen_led_config(kb_info_json))
+
+    # Show the results
+    dump_lines(cli.args.output, keyboard_h_lines, cli.args.quiet)
diff --git a/lib/python/qmk/info.py b/lib/python/qmk/info.py
index 49d1054519..0763433b3d 100644
--- a/lib/python/qmk/info.py
+++ b/lib/python/qmk/info.py
@@ -8,7 +8,7 @@ from dotty_dict import dotty
 from milc import cli
 
 from qmk.constants import CHIBIOS_PROCESSORS, LUFA_PROCESSORS, VUSB_PROCESSORS
-from qmk.c_parse import find_layouts, parse_config_h_file
+from qmk.c_parse import find_layouts, parse_config_h_file, find_led_config
 from qmk.json_schema import deep_update, json_load, validate
 from qmk.keyboard import config_h, rules_mk
 from qmk.keymap import list_keymaps, locate_keymap
@@ -76,6 +76,9 @@ def info_json(keyboard):
     # Ensure that we have matrix row and column counts
     info_data = _matrix_size(info_data)
 
+    # Merge in data from <keyboard.c>
+    info_data = _extract_led_config(info_data, str(keyboard))
+
     # Validate against the jsonschema
     try:
         validate(info_data, 'qmk.api.keyboard.v1')
@@ -590,6 +593,46 @@ def _extract_rules_mk(info_data, rules):
     return info_data
 
 
+def find_keyboard_c(keyboard):
+    """Find all <keyboard>.c files
+    """
+    keyboard = Path(keyboard)
+    current_path = Path('keyboards/')
+
+    files = []
+    for directory in keyboard.parts:
+        current_path = current_path / directory
+        keyboard_c_path = current_path / f'{directory}.c'
+        if keyboard_c_path.exists():
+            files.append(keyboard_c_path)
+
+    return files
+
+
+def _extract_led_config(info_data, keyboard):
+    """Scan all <keyboard>.c files for led config
+    """
+    cols = info_data['matrix_size']['cols']
+    rows = info_data['matrix_size']['rows']
+
+    # Assume what feature owns g_led_config
+    feature = "rgb_matrix"
+    if info_data.get("features", {}).get("led_matrix", False):
+        feature = "led_matrix"
+
+    # Process
+    for file in find_keyboard_c(keyboard):
+        try:
+            ret = find_led_config(file, cols, rows)
+            if ret:
+                info_data[feature] = info_data.get(feature, {})
+                info_data[feature]["layout"] = ret
+        except Exception as e:
+            _log_warning(info_data, f'led_config: {file.name}: {e}')
+
+    return info_data
+
+
 def _matrix_size(info_data):
     """Add info_data['matrix_size'] if it doesn't exist.
     """
diff --git a/lib/python/qmk/json_encoders.py b/lib/python/qmk/json_encoders.py
index 40a5c1dea8..f968b3dbb2 100755
--- a/lib/python/qmk/json_encoders.py
+++ b/lib/python/qmk/json_encoders.py
@@ -75,8 +75,8 @@ class InfoJSONEncoder(QMKJSONEncoder):
         """Encode info.json dictionaries.
         """
         if obj:
-            if self.indentation_level == 4:
-                # These are part of a layout, put them on a single line.
+            if set(("x", "y")).issubset(obj.keys()):
+                # These are part of a layout/led_config, put them on a single line.
                 return "{ " + ", ".join(f"{self.encode(key)}: {self.encode(element)}" for key, element in sorted(obj.items())) + " }"
 
             else: