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-rw-r--r--cgit.css10
-rw-r--r--ui-ssdiff.c145
2 files changed, 130 insertions, 25 deletions
diff --git a/cgit.css b/cgit.css index 3f37165..9e6d2a4 100644 --- a/cgit.css +++ b/cgit.css
@@ -627,6 +627,11 @@ table.ssdiff td.add_dark {
627 min-width: 50%; 627 min-width: 50%;
628} 628}
629 629
630table.ssdiff span.add {
631 background: #cfc;
632 font-weight: bold;
633}
634
630table.ssdiff td.del { 635table.ssdiff td.del {
631 color: black; 636 color: black;
632 background: #fcc; 637 background: #fcc;
@@ -639,6 +644,11 @@ table.ssdiff td.del_dark {
639 min-width: 50%; 644 min-width: 50%;
640} 645}
641 646
647table.ssdiff span.del {
648 background: #fcc;
649 font-weight: bold;
650}
651
642table.ssdiff td.changed { 652table.ssdiff td.changed {
643 color: black; 653 color: black;
644 background: #ffc; 654 background: #ffc;
diff --git a/ui-ssdiff.c b/ui-ssdiff.c index 5673642..408e620 100644 --- a/ui-ssdiff.c +++ b/ui-ssdiff.c
@@ -15,6 +15,52 @@ struct deferred_lines {
15static struct deferred_lines *deferred_old, *deferred_old_last; 15static struct deferred_lines *deferred_old, *deferred_old_last;
16static struct deferred_lines *deferred_new, *deferred_new_last; 16static struct deferred_lines *deferred_new, *deferred_new_last;
17 17
18static char *longest_common_subsequence(char *A, char *B)
19{
20 int i, j, ri;
21 int m = strlen(A);
22 int n = strlen(B);
23 int L[m + 1][n + 1];
24 int tmp1, tmp2;
25 int lcs_length;
26 char *result;
27
28 for (i = m; i >= 0; i--) {
29 for (j = n; j >= 0; j--) {
30 if (A[i] == '\0' || B[j] == '\0') {
31 L[i][j] = 0;
32 } else if (A[i] == B[j]) {
33 L[i][j] = 1 + L[i + 1][j + 1];
34 } else {
35 tmp1 = L[i + 1][j];
36 tmp2 = L[i][j + 1];
37 L[i][j] = (tmp1 > tmp2 ? tmp1 : tmp2);
38 }
39 }
40 }
41
42 lcs_length = L[0][0];
43 result = xmalloc(lcs_length + 2);
44 memset(result, 0, sizeof(*result) * (lcs_length + 2));
45
46 ri = 0;
47 i = 0;
48 j = 0;
49 while (i < m && j < n) {
50 if (A[i] == B[j]) {
51 result[ri] = A[i];
52 ri += 1;
53 i += 1;
54 j += 1;
55 } else if (L[i + 1][j] >= L[i][j + 1]) {
56 i += 1;
57 } else {
58 j += 1;
59 }
60 }
61 return result;
62}
63
18static int line_from_hunk(char *line, char type) 64static int line_from_hunk(char *line, char type)
19{ 65{
20 char *buf1, *buf2; 66 char *buf1, *buf2;
@@ -73,6 +119,17 @@ static char *replace_tabs(char *line)
73 return result; 119 return result;
74} 120}
75 121
122static int calc_deferred_lines(struct deferred_lines *start)
123{
124 struct deferred_lines *item = start;
125 int result = 0;
126 while (item) {
127 result += 1;
128 item = item->next;
129 }
130 return result;
131}
132
76static void deferred_old_add(char *line, int line_no) 133static void deferred_old_add(char *line, int line_no)
77{ 134{
78 struct deferred_lines *item = xmalloc(sizeof(struct deferred_lines)); 135 struct deferred_lines *item = xmalloc(sizeof(struct deferred_lines));
@@ -101,9 +158,45 @@ static void deferred_new_add(char *line, int line_no)
101 } 158 }
102} 159}
103 160
104static void print_ssdiff_line(char *class, int old_line_no, char *old_line, 161static void print_part_with_lcs(char *class, char *line, char *lcs)
105 int new_line_no, char *new_line) 162{
163 int line_len = strlen(line);
164 int i, j;
165 char c[2] = " ";
166 int same = 1;
167
168 j = 0;
169 for (i = 0; i < line_len; i++) {
170 c[0] = line[i];
171 if (same) {
172 if (line[i] == lcs[j])
173 j += 1;
174 else {
175 same = 0;
176 htmlf("<span class='%s'>", class);
177 }
178 } else if (line[i] == lcs[j]) {
179 same = 1;
180 htmlf("</span>");
181 j += 1;
182 }
183 html_txt(c);
184 }
185}
186
187static void print_ssdiff_line(char *class,
188 int old_line_no,
189 char *old_line,
190 int new_line_no,
191 char *new_line, int individual_chars)
106{ 192{
193 char *lcs = NULL;
194 if (old_line)
195 old_line = replace_tabs(old_line + 1);
196 if (new_line)
197 new_line = replace_tabs(new_line + 1);
198 if (individual_chars && old_line && new_line)
199 lcs = longest_common_subsequence(old_line, new_line);
107 html("<tr>"); 200 html("<tr>");
108 if (old_line_no > 0) 201 if (old_line_no > 0)
109 htmlf("<td class='lineno'>%d</td><td class='%s'>", 202 htmlf("<td class='lineno'>%d</td><td class='%s'>",
@@ -112,15 +205,14 @@ static void print_ssdiff_line(char *class, int old_line_no, char *old_line,
112 htmlf("<td class='lineno'></td><td class='%s'>", class); 205 htmlf("<td class='lineno'></td><td class='%s'>", class);
113 else 206 else
114 htmlf("<td class='lineno'></td><td class='%s_dark'>", class); 207 htmlf("<td class='lineno'></td><td class='%s_dark'>", class);
115
116 if (old_line) { 208 if (old_line) {
117 old_line = replace_tabs(old_line + 1); 209 if (lcs)
118 html_txt(old_line); 210 print_part_with_lcs("del", old_line, lcs);
119 free(old_line); 211 else
212 html_txt(old_line);
120 } 213 }
121 214
122 html("</td>"); 215 html("</td>");
123
124 if (new_line_no > 0) 216 if (new_line_no > 0)
125 htmlf("<td class='lineno'>%d</td><td class='%s'>", 217 htmlf("<td class='lineno'>%d</td><td class='%s'>",
126 new_line_no, class); 218 new_line_no, class);
@@ -128,24 +220,29 @@ static void print_ssdiff_line(char *class, int old_line_no, char *old_line,
128 htmlf("<td class='lineno'></td><td class='%s'>", class); 220 htmlf("<td class='lineno'></td><td class='%s'>", class);
129 else 221 else
130 htmlf("<td class='lineno'></td><td class='%s_dark'>", class); 222 htmlf("<td class='lineno'></td><td class='%s_dark'>", class);
131
132 if (new_line) { 223 if (new_line) {
133 new_line = replace_tabs(new_line + 1); 224 if (lcs)
134 html_txt(new_line); 225 print_part_with_lcs("add", new_line, lcs);
135 free(new_line); 226 else
227 html_txt(new_line);
136 } 228 }
137 229
138 html("</td></tr>"); 230 html("</td></tr>");
231 if (lcs)
232 free(lcs);
233 if (new_line)
234 free(new_line);
235 if (old_line)
236 free(old_line);
139} 237}
140 238
141static void print_deferred_old_lines() 239static void print_deferred_old_lines()
142{ 240{
143 struct deferred_lines *iter_old, *tmp; 241 struct deferred_lines *iter_old, *tmp;
144
145 iter_old = deferred_old; 242 iter_old = deferred_old;
146 while (iter_old) { 243 while (iter_old) {
147 print_ssdiff_line("del", iter_old->line_no, 244 print_ssdiff_line("del", iter_old->line_no,
148 iter_old->line, -1, NULL); 245 iter_old->line, -1, NULL, 0);
149 tmp = iter_old->next; 246 tmp = iter_old->next;
150 free(iter_old); 247 free(iter_old);
151 iter_old = tmp; 248 iter_old = tmp;
@@ -155,11 +252,10 @@ static void print_deferred_old_lines()
155static void print_deferred_new_lines() 252static void print_deferred_new_lines()
156{ 253{
157 struct deferred_lines *iter_new, *tmp; 254 struct deferred_lines *iter_new, *tmp;
158
159 iter_new = deferred_new; 255 iter_new = deferred_new;
160 while (iter_new) { 256 while (iter_new) {
161 print_ssdiff_line("add", -1, NULL, iter_new->line_no, 257 print_ssdiff_line("add", -1, NULL,
162 iter_new->line); 258 iter_new->line_no, iter_new->line, 0);
163 tmp = iter_new->next; 259 tmp = iter_new->next;
164 free(iter_new); 260 free(iter_new);
165 iter_new = tmp; 261 iter_new = tmp;
@@ -169,6 +265,9 @@ static void print_deferred_new_lines()
169static void print_deferred_changed_lines() 265static void print_deferred_changed_lines()
170{ 266{
171 struct deferred_lines *iter_old, *iter_new, *tmp; 267 struct deferred_lines *iter_old, *iter_new, *tmp;
268 int n_old_lines = calc_deferred_lines(deferred_old);
269 int n_new_lines = calc_deferred_lines(deferred_new);
270 int individual_chars = (n_old_lines == n_new_lines ? 1 : 0);
172 271
173 iter_old = deferred_old; 272 iter_old = deferred_old;
174 iter_new = deferred_new; 273 iter_new = deferred_new;
@@ -176,14 +275,14 @@ static void print_deferred_changed_lines()
176 if (iter_old && iter_new) 275 if (iter_old && iter_new)
177 print_ssdiff_line("changed", iter_old->line_no, 276 print_ssdiff_line("changed", iter_old->line_no,
178 iter_old->line, 277 iter_old->line,
179 iter_new->line_no, iter_new->line); 278 iter_new->line_no, iter_new->line,
279 individual_chars);
180 else if (iter_old) 280 else if (iter_old)
181 print_ssdiff_line("changed", iter_old->line_no, 281 print_ssdiff_line("changed", iter_old->line_no,
182 iter_old->line, -1, NULL); 282 iter_old->line, -1, NULL, 0);
183 else if (iter_new) 283 else if (iter_new)
184 print_ssdiff_line("changed", -1, NULL, 284 print_ssdiff_line("changed", -1, NULL,
185 iter_new->line_no, iter_new->line); 285 iter_new->line_no, iter_new->line, 0);
186
187 if (iter_old) { 286 if (iter_old) {
188 tmp = iter_old->next; 287 tmp = iter_old->next;
189 free(iter_old); 288 free(iter_old);
@@ -202,14 +301,12 @@ void cgit_ssdiff_print_deferred_lines()
202{ 301{
203 if (!deferred_old && !deferred_new) 302 if (!deferred_old && !deferred_new)
204 return; 303 return;
205
206 if (deferred_old && !deferred_new) 304 if (deferred_old && !deferred_new)
207 print_deferred_old_lines(); 305 print_deferred_old_lines();
208 else if (!deferred_old && deferred_new) 306 else if (!deferred_old && deferred_new)
209 print_deferred_new_lines(); 307 print_deferred_new_lines();
210 else 308 else
211 print_deferred_changed_lines(); 309 print_deferred_changed_lines();
212
213 deferred_old = deferred_old_last = NULL; 310 deferred_old = deferred_old_last = NULL;
214 deferred_new = deferred_new_last = NULL; 311 deferred_new = deferred_new_last = NULL;
215} 312}
@@ -220,9 +317,7 @@ void cgit_ssdiff_print_deferred_lines()
220void cgit_ssdiff_line_cb(char *line, int len) 317void cgit_ssdiff_line_cb(char *line, int len)
221{ 318{
222 char c = line[len - 1]; 319 char c = line[len - 1];
223
224 line[len - 1] = '\0'; 320 line[len - 1] = '\0';
225
226 if (line[0] == '@') { 321 if (line[0] == '@') {
227 current_old_line = line_from_hunk(line, '-'); 322 current_old_line = line_from_hunk(line, '-');
228 current_new_line = line_from_hunk(line, '+'); 323 current_new_line = line_from_hunk(line, '+');
@@ -232,7 +327,7 @@ void cgit_ssdiff_line_cb(char *line, int len)
232 if (deferred_old || deferred_new) 327 if (deferred_old || deferred_new)
233 cgit_ssdiff_print_deferred_lines(); 328 cgit_ssdiff_print_deferred_lines();
234 print_ssdiff_line("ctx", current_old_line, line, 329 print_ssdiff_line("ctx", current_old_line, line,
235 current_new_line, line); 330 current_new_line, line, 0);
236 current_old_line += 1; 331 current_old_line += 1;
237 current_new_line += 1; 332 current_new_line += 1;
238 } else if (line[0] == '+') { 333 } else if (line[0] == '+') {