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PUBLIC
INHERITING FROM zcl_abapgit_syntax_highlighter
CREATE PUBLIC .
PUBLIC SECTION.
CONSTANTS:
" JavaScript
" Language keywords / built-in members and objects
BEGIN OF c_css,
keyword TYPE string VALUE 'keyword',
text TYPE string VALUE 'text',
comment TYPE string VALUE 'comment',
variables TYPE string VALUE 'variables',
values TYPE string VALUE 'values',
END OF c_css .
CONSTANTS:
BEGIN OF c_token,
keyword TYPE c VALUE 'K',
text TYPE c VALUE 'T',
comment TYPE c VALUE 'C',
variables TYPE c VALUE 'V',
values TYPE c VALUE 'L',
END OF c_token .
CONSTANTS:
BEGIN OF c_regex,
" comments /* ... */ or //
comment TYPE string VALUE '\/\*|\*\/|\/\/',
" Single / double quoted strings and template literals
text TYPE string VALUE '"|''|`',
" Consume whole identifiers, including digits, underscores and dollar signs
keyword TYPE string VALUE '[a-zA-Z0-9_$]+',
END OF c_regex .
CLASS-METHODS class_constructor .
METHODS constructor .
PROTECTED SECTION.
TYPES: ty_token TYPE c LENGTH 1.
TYPES: BEGIN OF ty_keyword,
keyword TYPE string,
token TYPE ty_token,
END OF ty_keyword.
CLASS-DATA gt_keywords TYPE HASHED TABLE OF ty_keyword WITH UNIQUE KEY keyword.
DATA mv_comment TYPE abap_bool.
DATA mv_text_tag TYPE string.
CLASS-METHODS init_keywords.
CLASS-METHODS insert_keywords
IMPORTING
iv_keywords TYPE string
iv_token TYPE ty_token.
CLASS-METHODS is_keyword
IMPORTING iv_chunk TYPE string
RETURNING VALUE(rv_yes) TYPE abap_bool.
METHODS order_matches REDEFINITION.
METHODS parse_line REDEFINITION.
PRIVATE SECTION.
ENDCLASS.
CLASS zcl_abapgit_syntax_js IMPLEMENTATION.
METHOD class_constructor.
init_keywords( ).
ENDMETHOD.
METHOD constructor.
super->constructor( ).
" Reset indicator for multi-line comments
CLEAR: mv_comment, mv_text_tag.
" Initialize instances of regular expression
add_rule( iv_regex = c_regex-keyword
iv_token = c_token-keyword
iv_style = c_css-keyword ).
add_rule( iv_regex = c_regex-comment
iv_token = c_token-comment
iv_style = c_css-comment ).
add_rule( iv_regex = c_regex-text
iv_token = c_token-text
iv_style = c_css-text ).
" Styles for keywords
add_rule( iv_regex = ''
iv_token = c_token-variables
iv_style = c_css-variables ).
add_rule( iv_regex = ''
iv_token = c_token-values
iv_style = c_css-values ).
ENDMETHOD.
METHOD init_keywords.
DATA: lv_keywords TYPE string.
CLEAR gt_keywords.
" Language keywords, reserved words and contextual keywords (ECMAScript)
lv_keywords =
'async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|' &&
'finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|of|package|' &&
'private|protected|public|return|set|static|super|switch|this|throw|try|typeof|using|var|while|with|' &&
'yield'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-keyword ).
" Literal / global values; void is an operator yielding undefined
lv_keywords = 'false|true|null|void|undefined|NaN|Infinity'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-values ).
" Global functions and commonly used built-in members (case-sensitive)
lv_keywords =
'decodeURI|decodeURIComponent|encodeURI|encodeURIComponent|escape|eval|isFinite|' &&
'isNaN|parseFloat|parseInt|unescape|arguments|constructor|prototype|length|name|valueOf|toString|' &&
'toLocaleString|apply|bind|call|assign|create|defineProperties|defineProperty|entries|freeze|fromEntries|' &&
'getOwnPropertyDescriptor|getOwnPropertyDescriptors|getOwnPropertyNames|getOwnPropertySymbols|' &&
'getPrototypeOf|hasOwn|hasOwnProperty|is|isExtensible|isFrozen|isSealed|keys|preventExtensions|' &&
'propertyIsEnumerable|seal|setPrototypeOf|values|at|concat|copyWithin|every|fill|filter|find|findIndex|' &&
'findLast|findLastIndex|flat|flatMap|forEach|includes|indexOf|isArray|join|lastIndexOf|map|pop|push|' &&
'reduce|reduceRight|reverse|shift|slice|some|sort|splice|toReversed|toSorted|toSpliced|unshift|' &&
'charAt|charCodeAt|codePointAt|endsWith|fromCharCode|fromCodePoint|localeCompare|match|matchAll|' &&
'normalize|padEnd|padStart|repeat|replace|replaceAll|search|split|startsWith|substring|substr|' &&
'toLowerCase|toUpperCase|toLocaleLowerCase|toLocaleUpperCase|trim|trimEnd|trimStart|' &&
'MAX_VALUE|MIN_VALUE|MAX_SAFE_INTEGER|MIN_SAFE_INTEGER|NEGATIVE_INFINITY|POSITIVE_INFINITY|EPSILON|' &&
'isInteger|isSafeInteger|toExponential|toFixed|toPrecision|E|LN10|LN2|LOG10E|LOG2E|PI|SQRT1_2|SQRT2|' &&
'abs|acos|acosh|asin|asinh|atan|atan2|atanh|cbrt|ceil|clz32|cos|cosh|exp|expm1|floor|fround|hypot|' &&
'imul|log|log10|log1p|log2|max|min|pow|random|round|sign|sin|sinh|sqrt|tan|tanh|trunc|' &&
'now|parse|UTC|getDate|getDay|getFullYear|getHours|getMilliseconds|getMinutes|getMonth|getSeconds|' &&
'getTime|getTimezoneOffset|getUTCDate|getUTCDay|getUTCFullYear|getUTCHours|getUTCMilliseconds|' &&
'getUTCMinutes|getUTCMonth|getUTCSeconds|setDate|setFullYear|setHours|setMilliseconds|setMinutes|' &&
'setMonth|setSeconds|setTime|setUTCDate|setUTCFullYear|setUTCHours|setUTCMilliseconds|setUTCMinutes|' &&
'setUTCMonth|setUTCSeconds|toDateString|toISOString|toJSON|toTimeString|toUTCString|' &&
'all|allSettled|any|race|reject|resolve|then|withResolvers|add|clear|has|size|stringify|exec|test'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-keyword ).
" Browser globals / DOM members; HTML tag names are not JavaScript keywords
lv_keywords =
'alert|confirm|prompt|console|debug|error|info|warn|window|document|navigator|screen|history|location|' &&
'self|parent|top|opener|frames|localStorage|sessionStorage|fetch|setTimeout|clearTimeout|setInterval|' &&
'clearInterval|requestAnimationFrame|cancelAnimationFrame|queueMicrotask|structuredClone|atob|btoa|' &&
'addEventListener|removeEventListener|dispatchEvent|getElementById|getElementsByClassName|' &&
'getElementsByTagName|querySelector|querySelectorAll|createElement|createTextNode|appendChild|' &&
'removeChild|replaceChild|insertBefore|setAttribute|getAttribute|removeAttribute|classList|' &&
'innerHTML|outerHTML|textContent|style|value|checked|disabled|selected|selectedIndex|children|' &&
'parentNode|parentElement|nextSibling|previousSibling|firstChild|lastChild|body|head|title|cookie|' &&
'forms|images|links|href|host|hostname|pathname|port|protocol|hash|origin|reload|replaceState|' &&
'pushState|back|forward|go|open|close|focus|blur|click|submit|reset|scroll|scrollBy|scrollTo|' &&
'clientHeight|clientWidth|offsetHeight|offsetWidth|offsetLeft|offsetTop|offsetParent|scrollTop|' &&
'scrollLeft|innerHeight|innerWidth|outerHeight|outerWidth|pageXOffset|pageYOffset|userAgent|' &&
'onabort|onblur|onchange|onclick|ondblclick|onerror|onfocus|oninput|onkeydown|onkeypress|onkeyup|' &&
'onload|onmousedown|onmousemove|onmouseout|onmouseover|onmouseup|onreset|onresize|onselect|onsubmit|onunload'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-keyword ).
" Built-in objects / constructors (Function is distinct from the function keyword)
lv_keywords =
'Array|ArrayBuffer|AsyncDisposableStack|Atomics|BigInt|BigInt64Array|BigUint64Array|Boolean|DataView|' &&
'Date|DisposableStack|Error|EvalError|FinalizationRegistry|Float16Array|Float32Array|Float64Array|' &&
'Function|Int8Array|Int16Array|Int32Array|Intl|Iterator|JSON|Map|Math|Number|Object|Promise|Proxy|' &&
'RangeError|ReferenceError|Reflect|RegExp|Set|SharedArrayBuffer|String|SuppressedError|Symbol|' &&
'SyntaxError|TypeError|Uint8Array|Uint8ClampedArray|Uint16Array|Uint32Array|URIError|WeakMap|WeakRef|' &&
'WeakSet|globalThis|AggregateError|AbortController|AbortSignal|Blob|CustomEvent|Event|File|FileReader|' &&
'FormData|Headers|Image|Node|Option|Request|Response|TextDecoder|TextEncoder|URL|URLSearchParams|WebSocket'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-variables ).
ENDMETHOD.
METHOD insert_keywords.
DATA: lt_keywords TYPE STANDARD TABLE OF string,
ls_keyword TYPE ty_keyword.
FIELD-SYMBOLS: <lv_keyword> TYPE any.
SPLIT iv_keywords AT '|' INTO TABLE lt_keywords.
LOOP AT lt_keywords ASSIGNING <lv_keyword>.
CLEAR ls_keyword.
ls_keyword-keyword = <lv_keyword>.
ls_keyword-token = iv_token.
INSERT ls_keyword INTO TABLE gt_keywords.
ENDLOOP.
ENDMETHOD.
METHOD is_keyword.
READ TABLE gt_keywords WITH TABLE KEY keyword = iv_chunk TRANSPORTING NO FIELDS.
rv_yes = boolc( sy-subrc = 0 ).
ENDMETHOD.
METHOD order_matches.
DATA:
lt_matches TYPE ty_match_tt,
ls_match TYPE ty_match,
lv_match TYPE string,
lv_line_len TYPE i,
lv_comment_start TYPE i,
lv_next TYPE i,
lv_pos TYPE i,
lv_tag TYPE string,
lv_closed TYPE abap_bool.
FIELD-SYMBOLS:
<ls_match> TYPE ty_match,
<ls_keyword> TYPE ty_keyword.
SORT ct_matches BY offset length DESCENDING.
lv_line_len = strlen( iv_line ).
" A template literal may continue from the preceding line
IF mv_text_tag IS NOT INITIAL.
CLEAR ls_match.
ls_match-token = c_token-text.
INSERT ls_match INTO ct_matches INDEX 1.
ENDIF.
LOOP AT ct_matches ASSIGNING <ls_match>.
IF <ls_match>-offset < lv_next.
CONTINUE.
ENDIF.
lv_match = substring( val = iv_line
off = <ls_match>-offset
len = <ls_match>-length ).
" Only */ can end an open block comment; quotes and // are ordinary text
IF mv_comment = abap_true.
IF <ls_match>-token = c_token-comment AND lv_match = '*/'.
CLEAR ls_match.
ls_match-token = c_token-comment.
ls_match-offset = lv_comment_start.
lv_next = <ls_match>-offset + 2.
ls_match-length = lv_next - lv_comment_start.
APPEND ls_match TO lt_matches.
CLEAR mv_comment.
ENDIF.
CONTINUE.
ENDIF.
CASE <ls_match>-token.
WHEN c_token-keyword.
READ TABLE gt_keywords ASSIGNING <ls_keyword> WITH TABLE KEY keyword = lv_match.
IF sy-subrc = 0.
ls_match = <ls_match>.
ls_match-token = <ls_keyword>-token.
APPEND ls_match TO lt_matches.
ENDIF.
WHEN c_token-comment.
IF lv_match = '/*'.
lv_comment_start = <ls_match>-offset.
mv_comment = abap_true.
ELSEIF lv_match = '//'.
ls_match = <ls_match>.
ls_match-length = lv_line_len - ls_match-offset.
APPEND ls_match TO lt_matches.
EXIT.
ENDIF.
WHEN c_token-text.
lv_tag = lv_match.
lv_pos = <ls_match>-offset + 1.
IF mv_text_tag IS NOT INITIAL.
lv_tag = mv_text_tag.
lv_pos = 0.
CLEAR mv_text_tag.
ENDIF.
CLEAR lv_closed.
WHILE lv_pos < lv_line_len.
IF iv_line+lv_pos(1) = '\'.
" Escaped delimiters and escaped backslashes do not close the string
lv_pos = lv_pos + 2.
ELSEIF iv_line+lv_pos(1) = lv_tag.
lv_pos = lv_pos + 1.
lv_closed = abap_true.
EXIT.
ELSE.
lv_pos = lv_pos + 1.
ENDIF.
ENDWHILE.
lv_next = nmin( val1 = lv_pos
val2 = lv_line_len ).
ls_match = <ls_match>.
ls_match-length = lv_next - ls_match-offset.
APPEND ls_match TO lt_matches.
" Treat the entire template as text, including interpolation
IF lv_closed = abap_false AND lv_tag = '`'.
mv_text_tag = lv_tag.
ENDIF.
ENDCASE.
ENDLOOP.
IF mv_comment = abap_true.
CLEAR ls_match.
ls_match-token = c_token-comment.
ls_match-offset = lv_comment_start.
ls_match-length = lv_line_len - lv_comment_start.
APPEND ls_match TO lt_matches.
ENDIF.
ct_matches = lt_matches.
ENDMETHOD.
METHOD parse_line. "REDEFINITION
FIELD-SYMBOLS <ls_match> LIKE LINE OF rt_matches.
rt_matches = super->parse_line( iv_line ).
" Remove non-keywords
LOOP AT rt_matches ASSIGNING <ls_match> WHERE token = c_token-keyword.
IF abap_false = is_keyword( substring( val = iv_line
off = <ls_match>-offset
len = <ls_match>-length ) ).
CLEAR <ls_match>-token.
ENDIF.
ENDLOOP.
DELETE rt_matches WHERE token IS INITIAL.
ENDMETHOD.
ENDCLASS.
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