Press n or j to go to the next uncovered block, b, p or k for the previous block.
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PUBLIC
CREATE PUBLIC.
PUBLIC SECTION.
CONSTANTS c_starting_beacon TYPE i VALUE 1.
* assumes data is UTF8 based with newlines
METHODS constructor
IMPORTING
!iv_new TYPE xstring
!iv_old TYPE xstring
!iv_ignore_indentation TYPE abap_bool DEFAULT abap_false
!iv_ignore_comments TYPE abap_bool DEFAULT abap_false
!iv_ignore_case TYPE abap_bool DEFAULT abap_false
RAISING
zcx_abapgit_exception.
METHODS get
RETURNING
VALUE(rt_diff) TYPE zif_abapgit_definitions=>ty_diffs_tt.
METHODS stats
RETURNING
VALUE(rs_count) TYPE zif_abapgit_definitions=>ty_count.
METHODS set_patch_new
IMPORTING
!iv_line_new TYPE i
!iv_patch_flag TYPE abap_bool
RAISING
zcx_abapgit_exception.
METHODS set_patch_old
IMPORTING
!iv_line_old TYPE i
!iv_patch_flag TYPE abap_bool
RAISING
zcx_abapgit_exception.
METHODS get_beacons
RETURNING
VALUE(rt_beacons) TYPE zif_abapgit_definitions=>ty_string_tt.
METHODS is_line_patched
IMPORTING
iv_index TYPE i
RETURNING
VALUE(rv_patched) TYPE abap_bool
RAISING
zcx_abapgit_exception.
METHODS set_patch_by_old_diff
IMPORTING
is_diff_old TYPE zif_abapgit_definitions=>ty_diff
iv_patch_flag TYPE abap_bool.
PROTECTED SECTION.
PRIVATE SECTION.
TYPES:
ty_regexset_tt TYPE STANDARD TABLE OF REF TO cl_abap_regex WITH KEY table_line.
DATA mt_beacons TYPE zif_abapgit_definitions=>ty_string_tt.
DATA mt_diff TYPE zif_abapgit_definitions=>ty_diffs_tt.
DATA ms_stats TYPE zif_abapgit_definitions=>ty_count.
DATA mv_compare_mode TYPE c LENGTH 1.
DATA mv_ignore_case TYPE abap_bool.
METHODS unpack
IMPORTING
!iv_new TYPE xstring
!iv_old TYPE xstring
EXPORTING
!et_new TYPE rswsourcet
!et_old TYPE rswsourcet
RAISING
zcx_abapgit_exception.
METHODS map_beacons.
METHODS shortlist.
METHODS create_regex_set
RETURNING
VALUE(rt_regex_set) TYPE ty_regexset_tt.
METHODS compute_diff
IMPORTING
!it_new TYPE rswsourcet
!it_old TYPE rswsourcet
RETURNING
VALUE(rt_diff) TYPE zif_abapgit_definitions=>ty_diffs_tt.
METHODS compute_diff_extra
IMPORTING
!it_new TYPE rswsourcet
!it_old TYPE rswsourcet
RETURNING
VALUE(rt_diff) TYPE zif_abapgit_definitions=>ty_diffs_tt.
METHODS calculate_stats.
METHODS adjust_diff.
ENDCLASS.
CLASS zcl_abapgit_diff IMPLEMENTATION.
METHOD adjust_diff.
" ABAP kernel diff traverses files from bottom up which leads to odd display of diffs
" SAP won't adjust this kernel service so we will do it here
" https://github.com/abapGit/abapGit/issues/4395
TYPES:
BEGIN OF ty_diff_block,
start TYPE i,
len TYPE i,
END OF ty_diff_block.
DATA:
lv_block_begin TYPE i,
lv_block_end TYPE i,
ls_diff_block TYPE ty_diff_block,
lt_diff_block TYPE STANDARD TABLE OF ty_diff_block WITH DEFAULT KEY.
FIELD-SYMBOLS:
<ls_diff> LIKE LINE OF mt_diff,
<ls_diff_begin> LIKE LINE OF mt_diff,
<ls_diff_end> LIKE LINE OF mt_diff.
" Determine start and length of diff blocks
LOOP AT mt_diff ASSIGNING <ls_diff>.
IF <ls_diff>-result = zif_abapgit_definitions=>c_diff-insert OR
<ls_diff>-result = zif_abapgit_definitions=>c_diff-delete.
IF ls_diff_block IS INITIAL.
ls_diff_block-start = sy-tabix.
ENDIF.
ls_diff_block-len = ls_diff_block-len + 1.
ELSEIF ls_diff_block-start IS NOT INITIAL.
APPEND ls_diff_block TO lt_diff_block.
CLEAR ls_diff_block.
ENDIF.
ENDLOOP.
" For each diff block, check if beginning is same as end of block
" If yes, move diff block down
LOOP AT lt_diff_block INTO ls_diff_block.
DO ls_diff_block-len TIMES.
lv_block_begin = ls_diff_block-start + sy-index - 1.
READ TABLE mt_diff ASSIGNING <ls_diff_begin> INDEX lv_block_begin.
IF sy-subrc <> 0.
EXIT.
ENDIF.
lv_block_end = ls_diff_block-start + ls_diff_block-len + sy-index - 1.
READ TABLE mt_diff ASSIGNING <ls_diff_end> INDEX lv_block_end.
IF sy-subrc <> 0.
EXIT.
ENDIF.
CASE <ls_diff_begin>-result.
WHEN zif_abapgit_definitions=>c_diff-insert.
IF <ls_diff_begin>-new = <ls_diff_end>-new.
<ls_diff_begin>-old_num = <ls_diff_end>-old_num.
<ls_diff_begin>-old = <ls_diff_end>-old.
<ls_diff_end>-result = <ls_diff_begin>-result.
CLEAR: <ls_diff_begin>-result, <ls_diff_end>-old_num, <ls_diff_end>-old.
ELSE.
EXIT.
ENDIF.
WHEN zif_abapgit_definitions=>c_diff-delete.
IF <ls_diff_begin>-old = <ls_diff_end>-old.
<ls_diff_begin>-new_num = <ls_diff_end>-new_num.
<ls_diff_begin>-new = <ls_diff_end>-new.
<ls_diff_end>-result = <ls_diff_begin>-result.
CLEAR: <ls_diff_begin>-result, <ls_diff_end>-new_num, <ls_diff_end>-new.
ELSE.
EXIT.
ENDIF.
WHEN OTHERS.
EXIT.
ENDCASE.
ENDDO.
ENDLOOP.
ENDMETHOD.
METHOD calculate_stats.
FIELD-SYMBOLS: <ls_diff> LIKE LINE OF mt_diff.
LOOP AT mt_diff ASSIGNING <ls_diff>.
CASE <ls_diff>-result.
WHEN zif_abapgit_definitions=>c_diff-insert.
ms_stats-insert = ms_stats-insert + 1.
WHEN zif_abapgit_definitions=>c_diff-delete.
ms_stats-delete = ms_stats-delete + 1.
WHEN zif_abapgit_definitions=>c_diff-update.
ms_stats-update = ms_stats-update + 1.
ENDCASE.
ENDLOOP.
ENDMETHOD.
METHOD compute_diff.
DATA:
lv_i TYPE i,
ls_diff LIKE LINE OF rt_diff,
lt_delta TYPE STANDARD TABLE OF rsedcresul WITH DEFAULT KEY.
FIELD-SYMBOLS:
<ls_delta> LIKE LINE OF lt_delta.
" Note: Ignore case is for keywords, variables, types etc, but not for literals
CALL FUNCTION 'RS_CMP_COMPUTE_DELTA'
EXPORTING
compare_mode = mv_compare_mode
ignore_case_differences = mv_ignore_case
TABLES
text_tab1 = it_new
text_tab2 = it_old
text_tab_res = lt_delta
EXCEPTIONS
parameter_invalid = 1
difference_not_found = 2
OTHERS = 3.
IF sy-subrc = 0.
" Process delta
LOOP AT lt_delta ASSIGNING <ls_delta>.
CLEAR ls_diff.
IF <ls_delta>-line1 > 0.
lv_i = <ls_delta>-line1.
ls_diff-old_num = lv_i.
ls_diff-old = <ls_delta>-text1.
ENDIF.
IF <ls_delta>-line2 > 0.
lv_i = <ls_delta>-line2.
ls_diff-new_num = lv_i.
ls_diff-new = <ls_delta>-text2.
ENDIF.
IF <ls_delta>-flag1 = 'D'.
ls_diff-result = zif_abapgit_definitions=>c_diff-delete.
ELSEIF <ls_delta>-flag2 = 'I'.
ls_diff-result = zif_abapgit_definitions=>c_diff-insert.
ELSEIF <ls_delta>-flag1 = 'M' AND <ls_delta>-flag2 = 'M'.
ls_diff-result = zif_abapgit_definitions=>c_diff-update.
ELSEIF <ls_delta>-flag1 = '' AND <ls_delta>-flag2 = ''.
ls_diff-result = zif_abapgit_definitions=>c_diff-unchanged.
ELSEIF <ls_delta>-flag1 = '' AND <ls_delta>-flag2 = 'E'. " ignore comment
ls_diff-result = zif_abapgit_definitions=>c_diff-unchanged.
ELSEIF <ls_delta>-flag1 = 'E' AND <ls_delta>-flag2 = ''. " ignore comment
ls_diff-result = zif_abapgit_definitions=>c_diff-unchanged.
ELSE.
ASSERT 0 = 1. " unknown comparison result
ENDIF.
APPEND ls_diff TO rt_diff.
ENDLOOP.
ELSEIF sy-subrc = 2.
" The function doesn't find all diffs...
rt_diff = compute_diff_extra( it_new = it_new
it_old = it_old ).
ELSE.
ASSERT 0 = 1. " incorrect function call
ENDIF.
ENDMETHOD.
METHOD compute_diff_extra.
DATA:
lv_last_new TYPE c LENGTH 1,
lv_last_old TYPE c LENGTH 1,
ls_diff LIKE LINE OF rt_diff.
FIELD-SYMBOLS:
<ls_old> LIKE LINE OF it_old,
<ls_new> LIKE LINE OF it_new.
LOOP AT it_old ASSIGNING <ls_old>.
CLEAR ls_diff.
ls_diff-old_num = sy-tabix.
ls_diff-old = <ls_old>.
READ TABLE it_new ASSIGNING <ls_new> INDEX sy-tabix.
IF sy-subrc <> 0.
EXIT.
ENDIF.
ls_diff-new_num = sy-tabix.
ls_diff-new = <ls_new>.
" SAP function ignores lines that contain only whitespace so we compare directly
" Also check if one line has trailing space(s)
IF ( mv_compare_mode = 1 OR mv_compare_mode = 3 ) AND <ls_old> <> <ls_new>.
IF strlen( condense( <ls_old> ) ) = 0 OR strlen( condense( <ls_new> ) ) = 0.
ls_diff-result = zif_abapgit_definitions=>c_diff-update.
ELSEIF strlen( <ls_old> ) > 0 AND strlen( <ls_new> ) > 0.
lv_last_new = substring( val = <ls_new>
off = strlen( <ls_new> ) - 1 ).
lv_last_old = substring( val = <ls_old>
off = strlen( <ls_old> ) - 1 ).
IF lv_last_new = space OR lv_last_old = space.
ls_diff-result = zif_abapgit_definitions=>c_diff-update.
ENDIF.
ENDIF.
ENDIF.
APPEND ls_diff TO rt_diff.
ENDLOOP.
ENDMETHOD.
METHOD constructor.
DATA: lt_new TYPE rswsourcet,
lt_old TYPE rswsourcet.
mv_compare_mode = 1.
IF iv_ignore_indentation = abap_true.
mv_compare_mode = mv_compare_mode + 1.
ENDIF.
IF iv_ignore_comments = abap_true.
mv_compare_mode = mv_compare_mode + 2.
ENDIF.
mv_ignore_case = iv_ignore_case.
unpack( EXPORTING iv_new = iv_new
iv_old = iv_old
IMPORTING et_new = lt_new
et_old = lt_old ).
mt_diff = compute_diff( it_new = lt_new
it_old = lt_old ).
adjust_diff( ).
calculate_stats( ).
map_beacons( ).
shortlist( ).
ENDMETHOD.
METHOD create_regex_set.
DATA: lo_regex TYPE REF TO cl_abap_regex,
lt_regex TYPE zif_abapgit_definitions=>ty_string_tt,
lv_regex LIKE LINE OF lt_regex.
APPEND '^\s*(CLASS|FORM|MODULE|REPORT|METHOD|INTERFACE|FUNCTION)\s[^=]' TO lt_regex.
APPEND '^\s*(PUBLIC|PROTECTED|PRIVATE)\sSECTION(\s|\.)' TO lt_regex.
APPEND '^\s*(CLASS|INTERFACE|FUNCTION|TYPE)-POOL\s' TO lt_regex.
APPEND '^\s*(START|END)-OF-SELECTION(\s|\.)' TO lt_regex.
APPEND '^\s*INITIALIZATION(\s|\.)' TO lt_regex.
APPEND '^\s*(TOP-OF-PAGE|END-OF-PAGE)(\s|\.)' TO lt_regex.
APPEND '^\s*AT\s*(SELECTION-SCREEN|LINE-SELECTION|USER-COMMAND|PF\d+)(\s|\.)' TO lt_regex.
APPEND '^\s*(DEFINE|ENHANCEMENT)\s' TO lt_regex.
LOOP AT lt_regex INTO lv_regex.
CREATE OBJECT lo_regex
EXPORTING
pattern = lv_regex
ignore_case = abap_true.
APPEND lo_regex TO rt_regex_set.
ENDLOOP.
ENDMETHOD.
METHOD get.
rt_diff = mt_diff.
ENDMETHOD.
METHOD get_beacons.
rt_beacons = mt_beacons.
ENDMETHOD.
METHOD is_line_patched.
FIELD-SYMBOLS: <ls_diff> TYPE zif_abapgit_definitions=>ty_diff.
READ TABLE mt_diff INDEX iv_index
ASSIGNING <ls_diff>.
IF sy-subrc = 0.
rv_patched = <ls_diff>-patch_flag.
ELSE.
zcx_abapgit_exception=>raise( |Diff line not found { iv_index }| ).
ENDIF.
ENDMETHOD.
METHOD map_beacons.
DATA: lv_beacon_idx TYPE i VALUE c_starting_beacon,
lv_offs TYPE i,
lv_beacon_str TYPE string,
lv_beacon_2lev TYPE string,
lv_submatch TYPE string,
lo_regex TYPE REF TO cl_abap_regex,
lt_regex TYPE ty_regexset_tt.
FIELD-SYMBOLS: <ls_diff> LIKE LINE OF mt_diff.
lt_regex = create_regex_set( ).
LOOP AT mt_diff ASSIGNING <ls_diff>.
CLEAR lv_offs.
<ls_diff>-beacon = lv_beacon_idx.
LOOP AT lt_regex INTO lo_regex.
FIND FIRST OCCURRENCE OF REGEX lo_regex IN <ls_diff>-new SUBMATCHES lv_submatch.
IF sy-subrc = 0. " Match
lv_beacon_str = <ls_diff>-new.
lv_submatch = to_upper( lv_submatch ).
" Get rid of comments and end of line
FIND FIRST OCCURRENCE OF '.' IN lv_beacon_str MATCH OFFSET lv_offs.
IF sy-subrc <> 0.
FIND FIRST OCCURRENCE OF '"' IN lv_beacon_str MATCH OFFSET lv_offs.
ENDIF.
IF lv_offs > 0.
lv_beacon_str = lv_beacon_str(lv_offs).
ENDIF.
lv_beacon_str = condense( val = lv_beacon_str
del = ` ` ).
IF lv_submatch = 'CLASS'.
lv_beacon_2lev = replace( val = lv_beacon_str
regex = '\s+(DEFINITION|IMPLEMENTATION)'
with = ''
occ = 0 ).
ELSEIF lv_submatch = 'METHOD'.
lv_beacon_str = lv_beacon_2lev && ` => ` && lv_beacon_str.
ELSEIF lv_submatch = 'PUBLIC' OR lv_submatch = 'PROTECTED' OR lv_submatch = 'PRIVATE'.
lv_beacon_str = lv_beacon_2lev && ` ` && lv_beacon_str.
ENDIF.
APPEND lv_beacon_str TO mt_beacons.
lv_beacon_idx = sy-tabix.
<ls_diff>-beacon = lv_beacon_idx.
EXIT. "Loop
ENDIF.
ENDLOOP.
ENDLOOP.
ENDMETHOD.
METHOD set_patch_by_old_diff.
FIELD-SYMBOLS: <ls_diff> TYPE zif_abapgit_definitions=>ty_diff.
LOOP AT mt_diff ASSIGNING <ls_diff>
USING KEY new_num
WHERE old = is_diff_old-old
AND new = is_diff_old-new
AND new_num = is_diff_old-new_num
AND old_num = is_diff_old-old_num.
<ls_diff>-patch_flag = iv_patch_flag.
EXIT.
ENDLOOP.
ENDMETHOD.
METHOD set_patch_new.
FIELD-SYMBOLS: <ls_diff> TYPE zif_abapgit_definitions=>ty_diff.
READ TABLE mt_diff WITH TABLE KEY new_num
COMPONENTS new_num = iv_line_new
ASSIGNING <ls_diff>.
IF sy-subrc <> 0.
zcx_abapgit_exception=>raise( |Invalid new line number { iv_line_new }| ).
ENDIF.
<ls_diff>-patch_flag = iv_patch_flag.
ENDMETHOD.
METHOD set_patch_old.
FIELD-SYMBOLS: <ls_diff> TYPE zif_abapgit_definitions=>ty_diff.
READ TABLE mt_diff WITH TABLE KEY old_num
COMPONENTS old_num = iv_line_old
ASSIGNING <ls_diff>.
IF sy-subrc <> 0.
zcx_abapgit_exception=>raise( |Invalid old line number { iv_line_old }| ).
ENDIF.
<ls_diff>-patch_flag = iv_patch_flag.
ENDMETHOD.
METHOD shortlist.
DATA: lv_index TYPE i.
FIELD-SYMBOLS: <ls_diff> LIKE LINE OF mt_diff.
IF lines( mt_diff ) < 20.
LOOP AT mt_diff ASSIGNING <ls_diff>.
<ls_diff>-short = abap_true.
ENDLOOP.
ELSE.
LOOP AT mt_diff TRANSPORTING NO FIELDS
WHERE NOT result IS INITIAL AND short = abap_false.
lv_index = sy-tabix.
DO 8 TIMES. " Backward
READ TABLE mt_diff INDEX ( lv_index - sy-index ) ASSIGNING <ls_diff>.
IF sy-subrc <> 0 OR <ls_diff>-short = abap_true. " tab bound or prev marker
EXIT.
ENDIF.
<ls_diff>-short = abap_true.
ENDDO.
DO 8 TIMES. " Forward
READ TABLE mt_diff INDEX ( lv_index + sy-index - 1 ) ASSIGNING <ls_diff>.
IF sy-subrc <> 0. " tab bound reached
EXIT.
ENDIF.
CHECK <ls_diff>-short = abap_false. " skip marked
<ls_diff>-short = abap_true.
ENDDO.
ENDLOOP.
ENDIF.
ENDMETHOD.
METHOD stats.
rs_count = ms_stats.
ENDMETHOD.
METHOD unpack.
DATA: lv_new TYPE string,
lv_old TYPE string,
lv_new_last TYPE c LENGTH 1,
lv_old_last TYPE c LENGTH 1.
lv_new = zcl_abapgit_convert=>xstring_to_string_utf8( iv_new ).
lv_old = zcl_abapgit_convert=>xstring_to_string_utf8( iv_old ).
" Check if one value contains a final newline but the other not
" If yes, add a special character that's visible in diff render
IF lv_new IS NOT INITIAL.
lv_new_last = substring(
val = lv_new
off = strlen( lv_new ) - 1 ).
ENDIF.
IF lv_old IS NOT INITIAL.
lv_old_last = substring(
val = lv_old
off = strlen( lv_old ) - 1 ).
ENDIF.
IF lv_new_last = cl_abap_char_utilities=>newline AND lv_old_last <> cl_abap_char_utilities=>newline
AND lv_old IS NOT INITIAL.
lv_old = lv_old && cl_abap_char_utilities=>form_feed.
ELSEIF lv_new_last <> cl_abap_char_utilities=>newline AND lv_old_last = cl_abap_char_utilities=>newline
AND lv_new IS NOT INITIAL.
lv_new = lv_new && cl_abap_char_utilities=>form_feed.
ENDIF.
SPLIT lv_new AT cl_abap_char_utilities=>newline INTO TABLE et_new.
SPLIT lv_old AT cl_abap_char_utilities=>newline INTO TABLE et_old.
ENDMETHOD.
ENDCLASS.
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