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PUBLIC
INHERITING FROM zcl_abapgit_syntax_highlighter
CREATE PUBLIC .
PUBLIC SECTION.
" CSS Standard https://www.w3.org/TR/css-2018/
" CSS Reference https://www.w3schools.com/cssref/default.asp
" We used a mixture of above as reference for the keyword list
" 1) CSS Properties https://www.w3schools.com/cssref/default.asp
" 2) CSS Values & Units https://www.w3schools.com/cssref/css_units.asp
" 3) CSS Selectors https://www.w3.org/TR/css-2018/#selectors
" 4) CSS Functions https://www.w3schools.com/cssref/css_functions.asp
" 5) CSS Colors https://www.w3schools.com/colors/colors_names.asp
" 6) CSS Extensions
" 7) CSS At-Rules https://www.w3.org/TR/css-2018/#at-rules
" 8) HTML Tags
CONSTANTS:
BEGIN OF c_css,
keyword TYPE string VALUE 'keyword',
text TYPE string VALUE 'text',
comment TYPE string VALUE 'comment',
selectors TYPE string VALUE 'selectors',
units TYPE string VALUE 'units',
properties TYPE string VALUE 'properties',
values TYPE string VALUE 'values',
functions TYPE string VALUE 'functions',
colors TYPE string VALUE 'colors',
extensions TYPE string VALUE 'extensions',
at_rules TYPE string VALUE 'at_rules',
html TYPE string VALUE 'html',
END OF c_css .
CONSTANTS:
BEGIN OF c_token,
keyword TYPE c VALUE 'K',
text TYPE c VALUE 'T',
comment TYPE c VALUE 'C',
selectors TYPE c VALUE 'S',
units TYPE c VALUE 'U',
properties TYPE c VALUE 'P',
values TYPE c VALUE 'V',
functions TYPE c VALUE 'F',
colors TYPE c VALUE 'Z',
extensions TYPE c VALUE 'E',
at_rules TYPE c VALUE 'A',
html TYPE c VALUE 'H',
END OF c_token .
CONSTANTS:
BEGIN OF c_regex,
" comments /* ... */
comment TYPE string VALUE '\/\*.*\*\/|\/\*|\*\/',
" single or double quoted strings
text TYPE string VALUE '("[^"]*")|(''[^'']*'')|(`[^`]*`)',
" in general keywords don't contain numbers (except -ms-scrollbar-3dlight-color)
keyword TYPE string VALUE '\b[a-z3@\-]+\b',
" selectors begin with :
selectors TYPE string VALUE ':[:a-z]+\b',
" units
units TYPE string
VALUE '\b[0-9\. ]+(ch|cm|em|ex|in|mm|pc|pt|px|vh|vmax|vmin|vw)\b|\b[0-9\. ]+%',
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.
CLASS-DATA gv_comment TYPE abap_bool.
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_css IMPLEMENTATION.
METHOD class_constructor.
init_keywords( ).
ENDMETHOD.
METHOD constructor.
super->constructor( ).
" Reset indicator for multi-line comments
CLEAR gv_comment.
" 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 ).
add_rule( iv_regex = c_regex-selectors
iv_token = c_token-selectors
iv_style = c_css-selectors ).
add_rule( iv_regex = c_regex-units
iv_token = c_token-units
iv_style = c_css-units ).
" Styles for keywords
add_rule( iv_regex = ''
iv_token = c_token-html
iv_style = c_css-html ).
add_rule( iv_regex = ''
iv_token = c_token-properties
iv_style = c_css-properties ).
add_rule( iv_regex = ''
iv_token = c_token-values
iv_style = c_css-values ).
add_rule( iv_regex = ''
iv_token = c_token-functions
iv_style = c_css-functions ).
add_rule( iv_regex = ''
iv_token = c_token-colors
iv_style = c_css-colors ).
add_rule( iv_regex = ''
iv_token = c_token-extensions
iv_style = c_css-extensions ).
add_rule( iv_regex = ''
iv_token = c_token-at_rules
iv_style = c_css-at_rules ).
ENDMETHOD.
METHOD init_keywords.
DATA: lv_keywords TYPE string.
CLEAR gt_keywords.
" 1) CSS Properties
lv_keywords =
'align-content|align-items|align-self|animation|animation-delay|animation-direction|animation-duration|' &&
'animation-fill-mode|animation-iteration-count|animation-name|animation-play-state|animation-timing-function|' &&
'backface-visibility|background|background-attachment|background-blend-mode|background-clip|background-color|' &&
'background-image|background-origin|background-position|background-repeat|background-size|border|' &&
'border-bottom|border-bottom-color|border-bottom-left-radius|border-bottom-right-radius|border-bottom-style|' &&
'border-bottom-width|border-collapse|border-color|border-image|border-image-outset|border-image-repeat|' &&
'border-image-slice|border-image-source|border-image-width|border-left|border-left-color|border-left-style|' &&
'border-left-width|border-radius|border-right|border-right-color|border-right-style|border-right-width|' &&
'border-spacing|border-style|border-top|border-top-color|border-top-left-radius|border-top-right-radius|' &&
'border-top-style|border-top-width|border-width|box-decoration-break|box-shadow|box-sizing|caption-side|' &&
'caret-color|clear|clip|color|column-count|column-fill|column-gap|column-rule|column-rule-color|' &&
'column-rule-style|column-rule-width|column-span|column-width|columns|content|counter-increment|' &&
'counter-reset|cursor|direction|display|empty-cells|filter|flex|flex-basis|flex-direction|flex-flow|' &&
'flex-grow|flex-shrink|flex-wrap|float|font|font-family|font-kerning|font-size|font-size-adjust|' &&
'font-stretch|font-style|font-variant|font-weight|grid|grid-area|grid-auto-columns|grid-auto-flow|' &&
'grid-auto-rows|grid-column|grid-column-end|grid-column-gap|grid-column-start|grid-gap|grid-row|' &&
'grid-row-end|grid-row-gap|grid-row-start|grid-template|grid-template-areas|grid-template-columns|' &&
'grid-template-rows|hanging-punctuation|height|hyphens|isolation|justify-content|' &&
'letter-spacing|line-height|list-style|list-style-image|list-style-position|list-style-type|margin|' &&
'margin-bottom|margin-left|margin-right|margin-top|max-height|max-width|media|min-height|min-width|' &&
'mix-blend-mode|object-fit|object-position|opacity|order|outline|outline-color|outline-offset|' &&
'outline-style|outline-width|overflow|overflow-x|overflow-y|padding|padding-bottom|padding-left|' &&
'padding-right|padding-top|page-break-after|page-break-before|page-break-inside|perspective|' &&
'perspective-origin|pointer-events|position|quotes|resize|scroll-behavior|tab-size|table-layout|' &&
'text-align|text-align-last|text-decoration|text-decoration-color|text-decoration-line|' &&
'text-decoration-style|text-indent|text-justify|text-overflow|text-rendering|text-shadow|text-transform|' &&
'transform|transform-origin|transform-style|transition|transition-delay|transition-duration|' &&
'transition-property|transition-timing-function|unicode-bidi|user-select|vertical-align|visibility|' &&
'white-space|width|word-break|word-spacing|word-wrap|writing-mode|z-index'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-properties ).
" 2) CSS Values
lv_keywords =
'absolute|all|auto|block|bold|border-box|both|bottom|center|counter|cover|dashed|fixed|hidden|important|' &&
'inherit|initial|inline-block|italic|left|max-content|middle|min-content|no-repeat|none|normal|pointer|' &&
'relative|rem|right|solid|table-cell|text|top|transparent|underline|url'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-values ).
" 3) CSS Selectors
lv_keywords =
':active|::after|::before|:checked|:disabled|:empty|:enabled|:first-child|::first-letter|::first-line|' &&
':first-of-type|:focus|:hover|:lang|:last-child|:last-of-type|:link|:not|:nth-child|:nth-last-child|' &&
':nth-last-of-type|:nth-of-type|:only-child|:only-of-type|:root|:target|:visited'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-selectors ).
" 4) CSS Functions
lv_keywords =
'attr|calc|cubic-bezier|hsl|hsla|linear-gradient|radial-gradient|repeating-linear-gradient|' &&
'repeating-radial-gradient|rgb|rgba|rotate|scale|translateX|translateY|var'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-functions ).
" 5) CSS Colors
lv_keywords =
'#|aliceblue|antiquewhite|aqua|aquamarine|azure|beige|bisque|black|blanchedalmond|blue|blueviolet|brown|' &&
'burlywood|cadetblue|chartreuse|chocolate|coral|cornflowerblue|cornsilk|crimson|cyan|darkblue|darkcyan|' &&
'darkgoldenrod|darkgray|darkgreen|darkgrey|darkkhaki|darkmagenta|darkolivegreen|darkorange|darkorchid|' &&
'darkred|darksalmon|darkseagreen|darkslateblue|darkslategray|darkslategrey|darkturquoise|darkviolet|' &&
'deeppink|deepskyblue|dimgray|dimgrey|dodgerblue|firebrick|floralwhite|forestgreen|fuchsia|gainsboro|' &&
'ghostwhite|gold|goldenrod|gray|green|greenyellow|grey|honeydew|hotpink|indianred|indigo|ivory|khaki|' &&
'lavender|lavenderblush|lawngreen|lemonchiffon|lightblue|lightcoral|lightcyan|lightgoldenrodyellow|' &&
'lightgray|lightgreen|lightgrey|lightpink|lightsalmon|lightseagreen|lightskyblue|lightslategray|' &&
'lightslategrey|lightsteelblue|lightyellow|lime|limegreen|linen|magenta|maroon|mediumaquamarine|' &&
'mediumblue|mediumorchid|mediumpurple|mediumseagreen|mediumslateblue|mediumspringgreen|mediumturquoise|' &&
'mediumvioletred|midnightblue|mintcream|mistyrose|moccasin|navajowhite|navy|oldlace|olive|olivedrab|' &&
'orange|orangered|orchid|palegoldenrod|palegreen|paleturquoise|palevioletred|papayawhip|peachpuff|' &&
'peru|pink|plum|powderblue|purple|rebeccapurple|red|rosybrown|royalblue|saddlebrown|salmon|sandybrown|' &&
'seagreen|seashell|sienna|silver|skyblue|slateblue|slategray|slategrey|snow|springgreen|steelblue|' &&
'tan|teal|thistle|tomato|turquoise|violet|wheat|white|whitesmoke|yellow|yellowgreen'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-colors ).
" 6) CSS Extensions
lv_keywords =
'moz|moz-binding|moz-border-bottom-colors|moz-border-left-colors|moz-border-right-colors|' &&
'moz-border-top-colors|moz-box-align|moz-box-direction|moz-box-flex|moz-box-ordinal-group|' &&
'moz-box-orient|moz-box-pack|moz-box-shadow|moz-context-properties|moz-float-edge|' &&
'moz-force-broken-image-icon|moz-image-region|moz-orient|moz-osx-font-smoothing|' &&
'moz-outline-radius|moz-outline-radius-bottomleft|moz-outline-radius-bottomright|' &&
'moz-outline-radius-topleft|moz-outline-radius-topright|moz-stack-sizing|moz-system-metric|' &&
'moz-transform|moz-transform-origin|moz-transition|moz-transition-delay|moz-user-focus|' &&
'moz-user-input|moz-user-modify|moz-window-dragging|moz-window-shadow|ms|ms-accelerator|' &&
'ms-block-progression|ms-content-zoom-chaining|ms-content-zoom-limit|' &&
'ms-content-zoom-limit-max|ms-content-zoom-limit-min|ms-content-zoom-snap|' &&
'ms-content-zoom-snap-points|ms-content-zoom-snap-type|ms-content-zooming|ms-filter|' &&
'ms-flow-from|ms-flow-into|ms-high-contrast-adjust|ms-hyphenate-limit-chars|' &&
'ms-hyphenate-limit-lines|ms-hyphenate-limit-zone|ms-ime-align|ms-overflow-style|' &&
'ms-scroll-chaining|ms-scroll-limit|ms-scroll-limit-x-max|ms-scroll-limit-x-min|' &&
'ms-scroll-limit-y-max|ms-scroll-limit-y-min|ms-scroll-rails|ms-scroll-snap-points-x|' &&
'ms-scroll-snap-points-y|ms-scroll-snap-x|ms-scroll-snap-y|ms-scroll-translation|' &&
'ms-scrollbar-3dlight-color|ms-scrollbar-arrow-color|ms-scrollbar-base-color|' &&
'ms-scrollbar-darkshadow-color|ms-scrollbar-face-color|ms-scrollbar-highlight-color|' &&
'ms-scrollbar-shadow-color|ms-scrollbar-track-color|ms-transform|ms-text-autospace|' &&
'ms-touch-select|ms-wrap-flow|ms-wrap-margin|ms-wrap-through|o|o-transform|webkit|' &&
'webkit-animation-trigger|webkit-app-region|webkit-appearance|webkit-aspect-ratio|' &&
'webkit-backdrop-filter|webkit-background-composite|webkit-border-after|' &&
'webkit-border-after-color|webkit-border-after-style|webkit-border-after-width|' &&
'webkit-border-before|webkit-border-before-color|webkit-border-before-style|' &&
'webkit-border-before-width|webkit-border-end|webkit-border-end-color|' &&
'webkit-border-end-style|webkit-border-end-width|webkit-border-fit|' &&
'webkit-border-horizontal-spacing|webkit-border-radius|webkit-border-start|' &&
'webkit-border-start-color|webkit-border-start-style|webkit-border-start-width|' &&
'webkit-border-vertical-spacing|webkit-box-align|webkit-box-direction|webkit-box-flex|' &&
'webkit-box-flex-group|webkit-box-lines|webkit-box-ordinal-group|webkit-box-orient|' &&
'webkit-box-pack|webkit-box-reflect|webkit-box-shadow|webkit-column-axis|' &&
'webkit-column-break-after|webkit-column-break-before|webkit-column-break-inside|' &&
'webkit-column-progression|webkit-cursor-visibility|webkit-dashboard-region|' &&
'webkit-font-size-delta|webkit-font-smoothing|webkit-highlight|webkit-hyphenate-character|' &&
'webkit-hyphenate-limit-after|webkit-hyphenate-limit-before|webkit-hyphenate-limit-lines|' &&
'webkit-initial-letter|webkit-line-align|webkit-line-box-contain|webkit-line-clamp|' &&
'webkit-line-grid|webkit-line-snap|webkit-locale|webkit-logical-height|' &&
'webkit-logical-width|webkit-margin-after|webkit-margin-after-collapse|' &&
'webkit-margin-before|webkit-margin-before-collapse|webkit-margin-bottom-collapse|' &&
'webkit-margin-collapse|webkit-margin-end|webkit-margin-start|webkit-margin-top-collapse|' &&
'webkit-marquee|webkit-marquee-direction|webkit-marquee-increment|' &&
'webkit-marquee-repetition|webkit-marquee-speed|webkit-marquee-style|webkit-mask-box-image|' &&
'webkit-mask-box-image-outset|webkit-mask-box-image-repeat|webkit-mask-box-image-slice|' &&
'webkit-mask-box-image-source|webkit-mask-box-image-width|webkit-mask-repeat-x|' &&
'webkit-mask-repeat-y|webkit-mask-source-type|webkit-max-logical-height|' &&
'webkit-max-logical-width|webkit-min-logical-height|webkit-min-logical-width|' &&
'webkit-nbsp-mode|webkit-padding-after|webkit-padding-before|webkit-padding-end|' &&
'webkit-padding-start|webkit-perspective-origin-x|webkit-perspective-origin-y|' &&
'webkit-print-color-adjust|webkit-rtl-ordering|webkit-svg-shadow|' &&
'webkit-tap-highlight-color|webkit-text-combine|webkit-text-decoration-skip|' &&
'webkit-text-decorations-in-effect|webkit-text-fill-color|webkit-text-security|' &&
'webkit-text-stroke|webkit-text-stroke-color|webkit-text-stroke-width|webkit-text-zoom|' &&
'webkit-transform|webkit-transform-origin|webkit-transform-origin-x|' &&
'webkit-transform-origin-y|webkit-transform-origin-z|webkit-transition|' &&
'webkit-transition-delay|webkit-user-drag|webkit-user-modify|overflow-clip-box|' &&
'overflow-clip-box-block|overflow-clip-box-inline|zoom'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-extensions ).
" 6) CSS At-Rules
lv_keywords =
'@|charset|counter-style|font-face|import|keyframes'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-at_rules ).
" 7) HTML tag
lv_keywords =
'doctyype|a|abbr|acronym|address|applet|area|b|base|basefont|bdo|bgsound|big|blink|blockquote|' &&
'body|br|button|caption|center|cite|code|col|colgroup|dd|del|dfn|dir|div|dl|dt|em|embed|fieldset|' &&
'font|form|frame|frameset|h1|h2|h3|h4|h5|h6|head|hr|html|i|iframe|ilayer|img|input|ins|isindex|' &&
'kbd|keygen|label|layer|legend|li|link|listing|map|menu|meta|multicol|nobr|noembed|noframes|' &&
'nolayer|noscript|object|ol|optgroup|option|p|param|plaintext|pre|q|s|samp|script|select|server|' &&
'small|sound|spacer|span|strike|strong|style|sub|sup|tbody|textarea|title|tt|u|ul|var|wbr|xmp|' &&
'xsl|xml|accesskey|action|align|alink|alt|background|balance|behavior|bgcolor|bgproperties|' &&
'border|bordercolor|bordercolordark|bordercolorlight|bottommargin|checked|class|classid|clear|' &&
'code|codebase|codetype|color|cols|colspan|compact|content|controls|coords|data|datafld|' &&
'dataformatas|datasrc|direction|disabled|dynsrc|enctype|event|face|for|frame|frameborder|' &&
'framespacing|height|hidden|href|hspace|http-equiv|id|ismap|lang|language|leftmargin|link|loop|' &&
'lowsrc|marginheight|marginwidth|maxlength|mayscript|method|methods|multiple|name|nohref|' &&
'noresize|noshade|nowrap|palette|pluginspage|public|readonly|rel|rev|rightmargin|rows|rowspan|' &&
'rules|scroll|scrollamount|scrolldelay|scrolling|selected|shape|size|span|src|start|style|' &&
'tabindex|target|text|title|topmargin|truespeed|type|url|urn|usemap|valign|value|vlink|volume|' &&
'vrml|vspace|width|wrap|apply-templates|attribute|choose|comment|define-template-set|' &&
'entity-ref|eval|expr|for-each|if|match|no-entities|node-name|order-by|otherwise|select|' &&
'stylesheet|template|test|value-of|version|when|xmlns|xsl|cellpadding|cellspacing|table|td|' &&
'tfoot|th|thead|tr'.
insert_keywords( iv_keywords = lv_keywords
iv_token = c_token-html ).
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.
DATA lv_str TYPE string.
lv_str = to_lower( iv_chunk ).
READ TABLE gt_keywords WITH TABLE KEY keyword = lv_str TRANSPORTING NO FIELDS.
rv_yes = boolc( sy-subrc = 0 ).
ENDMETHOD.
METHOD order_matches.
DATA:
lv_match TYPE string,
lv_line_len TYPE i,
lv_cmmt_end TYPE i,
lv_prev_end TYPE i,
lv_prev_token TYPE c.
FIELD-SYMBOLS:
<ls_prev> TYPE ty_match,
<ls_match> TYPE ty_match,
<ls_keyword> TYPE ty_keyword.
" Longest matches
SORT ct_matches BY offset length DESCENDING.
lv_line_len = strlen( iv_line ).
" Check if this is part of multi-line comment and mark it accordingly
IF gv_comment = abap_true.
READ TABLE ct_matches WITH KEY token = c_token-comment TRANSPORTING NO FIELDS.
IF sy-subrc <> 0.
CLEAR ct_matches.
APPEND INITIAL LINE TO ct_matches ASSIGNING <ls_match>.
<ls_match>-token = c_token-comment.
<ls_match>-offset = 0.
<ls_match>-length = lv_line_len.
RETURN.
ENDIF.
ENDIF.
LOOP AT ct_matches ASSIGNING <ls_match>.
" Delete matches after open text match
IF lv_prev_token = c_token-text AND <ls_match>-token <> c_token-text.
CLEAR <ls_match>-token.
CONTINUE.
ENDIF.
lv_match = substring( val = iv_line
off = <ls_match>-offset
len = <ls_match>-length ).
CASE <ls_match>-token.
WHEN c_token-keyword.
" Skip keyword that's part of previous (longer) keyword
IF <ls_match>-offset < lv_prev_end.
CLEAR <ls_match>-token.
CONTINUE.
ENDIF.
" Map generic keyword to specific CSS token
lv_match = to_lower( lv_match ).
READ TABLE gt_keywords ASSIGNING <ls_keyword> WITH TABLE KEY keyword = lv_match.
IF sy-subrc = 0.
<ls_match>-token = <ls_keyword>-token.
ENDIF.
WHEN c_token-comment.
IF lv_match = '/*'.
DELETE ct_matches WHERE offset > <ls_match>-offset.
<ls_match>-length = lv_line_len - <ls_match>-offset.
gv_comment = abap_true.
ELSEIF lv_match = '*/'.
DELETE ct_matches WHERE offset < <ls_match>-offset.
<ls_match>-length = <ls_match>-offset + 2.
<ls_match>-offset = 0.
gv_comment = abap_false.
ELSE.
lv_cmmt_end = <ls_match>-offset + <ls_match>-length.
DELETE ct_matches WHERE offset > <ls_match>-offset AND offset <= lv_cmmt_end.
ENDIF.
WHEN c_token-text.
<ls_match>-text_tag = lv_match.
IF lv_prev_token = c_token-text.
IF <ls_match>-text_tag = <ls_prev>-text_tag.
<ls_prev>-length = <ls_match>-offset + <ls_match>-length - <ls_prev>-offset.
CLEAR lv_prev_token.
ENDIF.
CLEAR <ls_match>-token.
CONTINUE.
ENDIF.
ENDCASE.
lv_prev_token = <ls_match>-token.
lv_prev_end = <ls_match>-offset + <ls_match>-length.
ASSIGN <ls_match> TO <ls_prev>.
ENDLOOP.
DELETE ct_matches WHERE token IS INITIAL.
ENDMETHOD.
METHOD parse_line. "REDEFINITION
DATA lv_index TYPE i.
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.
lv_index = sy-tabix.
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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