diff options
| -rw-r--r-- | diff.c | 34 | ||||
| -rwxr-xr-x | t/t4015-diff-whitespace.sh | 41 |
2 files changed, 68 insertions, 7 deletions
@@ -794,9 +794,11 @@ static void moved_block_clear(struct moved_block *b) memset(b, 0, sizeof(*b)); } +#define INDENT_BLANKLINE INT_MIN + static void fill_es_indent_data(struct emitted_diff_symbol *es) { - unsigned int off = 0; + unsigned int off = 0, i; int width = 0, tab_width = es->flags & WS_TAB_WIDTH_MASK; const char *s = es->line; const int len = es->len; @@ -820,8 +822,18 @@ static void fill_es_indent_data(struct emitted_diff_symbol *es) } } - es->indent_off = off; - es->indent_width = width; + /* check if this line is blank */ + for (i = off; i < len; i++) + if (!isspace(s[i])) + break; + + if (i == len) { + es->indent_width = INDENT_BLANKLINE; + es->indent_off = len; + } else { + es->indent_off = off; + es->indent_width = width; + } } static int compute_ws_delta(const struct emitted_diff_symbol *a, @@ -836,6 +848,11 @@ static int compute_ws_delta(const struct emitted_diff_symbol *a, b_width = b->indent_width; int delta; + if (a_width == INDENT_BLANKLINE && b_width == INDENT_BLANKLINE) { + *out = INDENT_BLANKLINE; + return 1; + } + if (a->s == DIFF_SYMBOL_PLUS) delta = a_width - b_width; else @@ -879,6 +896,10 @@ static int cmp_in_block_with_wsd(const struct diff_options *o, if (al != bl) return 1; + /* If 'l' and 'cur' are both blank then they match. */ + if (a_width == INDENT_BLANKLINE && c_width == INDENT_BLANKLINE) + return 0; + /* * The indent changes of the block are known and stored in pmb->wsd; * however we need to check if the indent changes of the current line @@ -890,6 +911,13 @@ static int cmp_in_block_with_wsd(const struct diff_options *o, else delta = c_width - a_width; + /* + * If the previous lines of this block were all blank then set its + * whitespace delta. + */ + if (pmb->wsd == INDENT_BLANKLINE) + pmb->wsd = delta; + return !(delta == pmb->wsd && al - a_off == cl - c_off && !memcmp(a, b, al) && ! memcmp(a + a_off, c + c_off, al - a_off)); diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh index e023839..9d6f88b 100755 --- a/t/t4015-diff-whitespace.sh +++ b/t/t4015-diff-whitespace.sh @@ -1901,10 +1901,20 @@ test_expect_success 'compare whitespace delta incompatible with other space opti test_i18ngrep allow-indentation-change err ' +EMPTY='' test_expect_success 'compare mixed whitespace delta across moved blocks' ' git reset --hard && tr Q_ "\t " <<-EOF >text.txt && + ${EMPTY} + ____too short without + ${EMPTY} + ___being grouped across blank line + ${EMPTY} + context + lines + to + anchor ____Indented text to _Q____be further indented by four spaces across ____Qseveral lines @@ -1918,9 +1928,18 @@ test_expect_success 'compare mixed whitespace delta across moved blocks' ' git commit -m "add text.txt" && tr Q_ "\t " <<-EOF >text.txt && + context + lines + to + anchor QIndented text to QQbe further indented by four spaces across Q____several lines + ${EMPTY} + QQtoo short without + ${EMPTY} + Q_______being grouped across blank line + ${EMPTY} Q_QThese two lines have had their indentation reduced by four spaces QQdifferent indentation change @@ -1937,7 +1956,16 @@ test_expect_success 'compare mixed whitespace delta across moved blocks' ' <BOLD>diff --git a/text.txt b/text.txt<RESET> <BOLD>--- a/text.txt<RESET> <BOLD>+++ b/text.txt<RESET> - <CYAN>@@ -1,7 +1,7 @@<RESET> + <CYAN>@@ -1,16 +1,16 @@<RESET> + <BOLD;MAGENTA>-<RESET> + <BOLD;MAGENTA>-<RESET><BOLD;MAGENTA> too short without<RESET> + <BOLD;MAGENTA>-<RESET> + <BOLD;MAGENTA>-<RESET><BOLD;MAGENTA> being grouped across blank line<RESET> + <BOLD;MAGENTA>-<RESET> + <RESET>context<RESET> + <RESET>lines<RESET> + <RESET>to<RESET> + <RESET>anchor<RESET> <BOLD;MAGENTA>-<RESET><BOLD;MAGENTA> Indented text to<RESET> <BOLD;MAGENTA>-<RESET><BRED> <RESET> <BOLD;MAGENTA> be further indented by four spaces across<RESET> <BOLD;MAGENTA>-<RESET><BRED> <RESET> <BOLD;MAGENTA>several lines<RESET> @@ -1948,9 +1976,14 @@ test_expect_success 'compare mixed whitespace delta across moved blocks' ' <BOLD;CYAN>+<RESET> <BOLD;CYAN>Indented text to<RESET> <BOLD;CYAN>+<RESET> <BOLD;CYAN>be further indented by four spaces across<RESET> <BOLD;CYAN>+<RESET> <BOLD;CYAN> several lines<RESET> - <BOLD;YELLOW>+<RESET> <BRED> <RESET> <BOLD;YELLOW>These two lines have had their<RESET> - <BOLD;YELLOW>+<RESET><BOLD;YELLOW>indentation reduced by four spaces<RESET> - <BOLD;CYAN>+<RESET> <BOLD;CYAN>different indentation change<RESET> + <BOLD;YELLOW>+<RESET> + <BOLD;YELLOW>+<RESET> <BOLD;YELLOW>too short without<RESET> + <BOLD;YELLOW>+<RESET> + <BOLD;YELLOW>+<RESET> <BOLD;YELLOW> being grouped across blank line<RESET> + <BOLD;YELLOW>+<RESET> + <BOLD;CYAN>+<RESET> <BRED> <RESET> <BOLD;CYAN>These two lines have had their<RESET> + <BOLD;CYAN>+<RESET><BOLD;CYAN>indentation reduced by four spaces<RESET> + <BOLD;YELLOW>+<RESET> <BOLD;YELLOW>different indentation change<RESET> <GREEN>+<RESET><BRED> <RESET> <GREEN>too short<RESET> EOF |