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PUBLIC
INHERITING FROM zcl_abapgit_syntax_highlighter
CREATE PUBLIC .
PUBLIC SECTION.
CONSTANTS:
BEGIN OF c_css,
xml_tag TYPE string VALUE 'xml_tag',
attr TYPE string VALUE 'attr',
attr_val TYPE string VALUE 'attr_val',
comment TYPE string VALUE 'comment',
END OF c_css .
CONSTANTS:
BEGIN OF c_token,
xml_tag TYPE c VALUE 'X',
attr TYPE c VALUE 'A',
attr_val TYPE c VALUE 'V',
comment TYPE c VALUE 'C',
END OF c_token .
CONSTANTS:
BEGIN OF c_regex,
"for XML tags, we will use a submatch
" main pattern includes quoted strings so we can ignore < and > in attr values
xml_tag TYPE string VALUE '(?:"[^"]*")|(?:''[^'']*'')|(?:`[^`]*`)|([<>])',
attr TYPE string VALUE '(?:^|\s)[-a-z:_0-9]+\s*(?==\s*["|''|`])',
attr_val TYPE string VALUE '("[^"]*")|(''[^'']*'')|(`[^`]*`)',
" comments <!-- ... -->
comment TYPE string VALUE '[\<]!--.*--[\>]|[\<]!--|--[\>]',
END OF c_regex .
METHODS constructor .
PROTECTED SECTION.
CLASS-DATA gv_comment TYPE abap_bool.
METHODS order_matches REDEFINITION.
PRIVATE SECTION.
ENDCLASS.
CLASS zcl_abapgit_syntax_xml IMPLEMENTATION.
METHOD constructor.
super->constructor( ).
" Reset indicator for multi-line comments
CLEAR gv_comment.
" Initialize instances of regular expressions
add_rule( iv_regex = c_regex-xml_tag
iv_token = c_token-xml_tag
iv_style = c_css-xml_tag
iv_submatch = 1 ).
add_rule( iv_regex = c_regex-attr
iv_token = c_token-attr
iv_style = c_css-attr ).
add_rule( iv_regex = c_regex-attr_val
iv_token = c_token-attr_val
iv_style = c_css-attr_val ).
add_rule( iv_regex = c_regex-comment
iv_token = c_token-comment
iv_style = c_css-comment ).
ENDMETHOD.
METHOD order_matches.
DATA:
lv_match TYPE string,
lv_line_len TYPE i,
lv_cmmt_end TYPE i,
lv_index TYPE sy-tabix,
lv_prev_token TYPE c,
lv_state TYPE c VALUE 'O'. " O - for open tag; C - for closed tag;
FIELD-SYMBOLS:
<ls_prev> TYPE ty_match,
<ls_match> TYPE ty_match.
SORT ct_matches BY offset.
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>.
lv_index = sy-tabix.
lv_match = substring( val = iv_line
off = <ls_match>-offset
len = <ls_match>-length ).
CASE <ls_match>-token.
WHEN c_token-xml_tag.
<ls_match>-text_tag = lv_match.
" No other matches between two tags
IF <ls_match>-text_tag = '>' AND lv_prev_token = c_token-xml_tag.
lv_state = 'C'.
<ls_prev>-length = <ls_match>-offset - <ls_prev>-offset + <ls_match>-length.
DELETE ct_matches INDEX lv_index.
CONTINUE.
" Adjust length and offset of closing tag
ELSEIF <ls_match>-text_tag = '>' AND lv_prev_token <> c_token-xml_tag.
lv_state = 'C'.
IF <ls_prev> IS ASSIGNED.
<ls_match>-length = <ls_match>-offset - <ls_prev>-offset - <ls_prev>-length + <ls_match>-length.
<ls_match>-offset = <ls_prev>-offset + <ls_prev>-length.
ENDIF.
ELSE.
lv_state = 'O'.
ENDIF.
WHEN c_token-comment.
IF lv_match = '<!--'.
DELETE ct_matches WHERE offset > <ls_match>-offset.
DELETE ct_matches WHERE offset = <ls_match>-offset AND token = c_token-xml_tag.
<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 + 3.
<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.
DELETE ct_matches WHERE offset = <ls_match>-offset AND token = c_token-xml_tag.
ENDIF.
WHEN OTHERS.
IF lv_prev_token = c_token-xml_tag.
<ls_prev>-length = <ls_match>-offset - <ls_prev>-offset. " Extend length of the opening tag
ENDIF.
IF lv_state = 'C'. " Delete all matches between tags
DELETE ct_matches INDEX lv_index.
CONTINUE.
ENDIF.
ENDCASE.
lv_prev_token = <ls_match>-token.
ASSIGN <ls_match> TO <ls_prev>.
ENDLOOP.
"if the last XML tag is not closed, extend it to the end of the tag
IF lv_prev_token = c_token-xml_tag
AND <ls_prev> IS ASSIGNED
AND <ls_prev>-length = 1
AND <ls_prev>-text_tag = '<'.
FIND REGEX '<\s*[^\s]*' IN iv_line+<ls_prev>-offset MATCH LENGTH <ls_prev>-length.
IF sy-subrc <> 0.
<ls_prev>-length = 1.
ENDIF.
ENDIF.
ENDMETHOD.
ENDCLASS.
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