1 files changed, 24 insertions, 10 deletions

diff --git a/ui-ssdiff.c b/ui-ssdiff.c
index 408e620..2481585 100644
--- a/ui-ssdiff.c
+++ b/ui-ssdiff.c
@@ -1,369 +1,383 @@
 #include "cgit.h"
 #include "html.h"
 #include "ui-shared.h"
+#include "ui-diff.h"
 
 extern int use_ssdiff;
 
 static int current_old_line, current_new_line;
 
 struct deferred_lines {
         int line_no;
         char *line;
         struct deferred_lines *next;
 };
 
 static struct deferred_lines *deferred_old, *deferred_old_last;
 static struct deferred_lines *deferred_new, *deferred_new_last;
 
 static char *longest_common_subsequence(char *A, char *B)
 {
         int i, j, ri;
         int m = strlen(A);
         int n = strlen(B);
         int L[m + 1][n + 1];
         int tmp1, tmp2;
         int lcs_length;
         char *result;
 
         for (i = m; i >= 0; i--) {
                 for (j = n; j >= 0; j--) {
                         if (A[i] == '\0' || B[j] == '\0') {
                                 L[i][j] = 0;
                         } else if (A[i] == B[j]) {
                                 L[i][j] = 1 + L[i + 1][j + 1];
                         } else {
                                 tmp1 = L[i + 1][j];
                                 tmp2 = L[i][j + 1];
                                 L[i][j] = (tmp1 > tmp2 ? tmp1 : tmp2);
                         }
                 }
         }
 
         lcs_length = L[0][0];
         result = xmalloc(lcs_length + 2);
         memset(result, 0, sizeof(*result) * (lcs_length + 2));
 
         ri = 0;
         i = 0;
         j = 0;
         while (i < m && j < n) {
                 if (A[i] == B[j]) {
                         result[ri] = A[i];
                         ri += 1;
                         i += 1;
                         j += 1;
                 } else if (L[i + 1][j] >= L[i][j + 1]) {
                         i += 1;
                 } else {
                         j += 1;
                 }
         }
         return result;
 }
 
 static int line_from_hunk(char *line, char type)
 {
         char *buf1, *buf2;
         int len;
 
         buf1 = strchr(line, type);
         if (buf1 == NULL)
                 return 0;
         buf1 += 1;
         buf2 = strchr(buf1, ',');
         if (buf2 == NULL)
                 return 0;
         len = buf2 - buf1;
         buf2 = xmalloc(len + 1);
         strncpy(buf2, buf1, len);
         buf2[len] = '\0';
         int res = atoi(buf2);
         free(buf2);
         return res;
 }
 
 static char *replace_tabs(char *line)
 {
         char *prev_buf = line;
         char *cur_buf;
         int linelen = strlen(line);
         int n_tabs = 0;
         int i;
         char *result;
         char *spaces = "        ";
 
         if (linelen == 0) {
                 result = xmalloc(1);
                 result[0] = '\0';
                 return result;
         }
 
         for (i = 0; i < linelen; i++)
                 if (line[i] == '\t')
                         n_tabs += 1;
         result = xmalloc(linelen + n_tabs * 8 + 1);
         result[0] = '\0';
 
         while (1) {
                 cur_buf = strchr(prev_buf, '\t');
                 if (!cur_buf) {
                         strcat(result, prev_buf);
                         break;
                 } else {
                         strcat(result, " ");
                         strncat(result, spaces, 8 - (strlen(result) % 8));
                         strncat(result, prev_buf, cur_buf - prev_buf);
                 }
                 prev_buf = cur_buf + 1;
         }
         return result;
 }
 
 static int calc_deferred_lines(struct deferred_lines *start)
 {
         struct deferred_lines *item = start;
         int result = 0;
         while (item) {
                 result += 1;
                 item = item->next;
         }
         return result;
 }
 
 static void deferred_old_add(char *line, int line_no)
 {
         struct deferred_lines *item = xmalloc(sizeof(struct deferred_lines));
         item->line = xstrdup(line);
         item->line_no = line_no;
         item->next = NULL;
         if (deferred_old) {
                 deferred_old_last->next = item;
                 deferred_old_last = item;
         } else {
                 deferred_old = deferred_old_last = item;
         }
 }
 
 static void deferred_new_add(char *line, int line_no)
 {
         struct deferred_lines *item = xmalloc(sizeof(struct deferred_lines));
         item->line = xstrdup(line);
         item->line_no = line_no;
         item->next = NULL;
         if (deferred_new) {
                 deferred_new_last->next = item;
                 deferred_new_last = item;
         } else {
                 deferred_new = deferred_new_last = item;
         }
 }
 
 static void print_part_with_lcs(char *class, char *line, char *lcs)
 {
         int line_len = strlen(line);
         int i, j;
         char c[2] = " ";
         int same = 1;
 
         j = 0;
         for (i = 0; i < line_len; i++) {
                 c[0] = line[i];
                 if (same) {
                         if (line[i] == lcs[j])
                                 j += 1;
                         else {
                                 same = 0;
                                 htmlf("<span class='%s'>", class);
                         }
                 } else if (line[i] == lcs[j]) {
                         same = 1;
                         htmlf("</span>");
                         j += 1;
                 }
                 html_txt(c);
         }
 }
 
 static void print_ssdiff_line(char *class,
                               int old_line_no,
                               char *old_line,
                               int new_line_no,
                               char *new_line, int individual_chars)
 {
         char *lcs = NULL;
+
         if (old_line)
                 old_line = replace_tabs(old_line + 1);
         if (new_line)
                 new_line = replace_tabs(new_line + 1);
         if (individual_chars && old_line && new_line)
                 lcs = longest_common_subsequence(old_line, new_line);
-        html("<tr>");
-        if (old_line_no > 0)
-                htmlf("<td class='lineno'>%d</td><td class='%s'>",
-                      old_line_no, class);
-        else if (old_line)
+        html("<tr>\n");
+        if (old_line_no > 0) {
+                struct diff_filespec *old_file = cgit_get_current_old_file();
+                char *lineno_str = fmt("n%d", old_line_no);
+                char *id_str = fmt("%s#%s", is_null_sha1(old_file->sha1)?"HEAD":sha1_to_hex(old_rev_sha1), lineno_str);
+                html("<td class='lineno'><a class='no' href='");
+                html(cgit_fileurl(ctx.repo->url, "tree", old_file->path, id_str));
+                htmlf("' id='%s' name='%s'>%s</a>", lineno_str, lineno_str, lineno_str + 1);
+                html("</td>");
+                htmlf("<td class='%s'>", class);
+        } else if (old_line)
                 htmlf("<td class='lineno'></td><td class='%s'>", class);
         else
                 htmlf("<td class='lineno'></td><td class='%s_dark'>", class);
         if (old_line) {
                 if (lcs)
                         print_part_with_lcs("del", old_line, lcs);
                 else
                         html_txt(old_line);
         }
 
-        html("</td>");
-        if (new_line_no > 0)
-                htmlf("<td class='lineno'>%d</td><td class='%s'>",
-                      new_line_no, class);
-        else if (new_line)
+        html("</td>\n");
+        if (new_line_no > 0) {
+                struct diff_filespec *new_file = cgit_get_current_new_file();
+                char *lineno_str = fmt("n%d", new_line_no);
+                char *id_str = fmt("%s#%s", is_null_sha1(new_file->sha1)?"HEAD":sha1_to_hex(new_rev_sha1), lineno_str);
+                html("<td class='lineno'><a class='no' href='");
+                html(cgit_fileurl(ctx.repo->url, "tree", new_file->path, id_str));
+                htmlf("' id='%s' name='%s'>%s</a>", lineno_str, lineno_str, lineno_str + 1);
+                html("</td>");
+                htmlf("<td class='%s'>", class);
+        } else if (new_line)
                 htmlf("<td class='lineno'></td><td class='%s'>", class);
         else
                 htmlf("<td class='lineno'></td><td class='%s_dark'>", class);
         if (new_line) {
                 if (lcs)
                         print_part_with_lcs("add", new_line, lcs);
                 else
                         html_txt(new_line);
         }
 
         html("</td></tr>");
         if (lcs)
                 free(lcs);
         if (new_line)
                 free(new_line);
         if (old_line)
                 free(old_line);
 }
 
 static void print_deferred_old_lines()
 {
         struct deferred_lines *iter_old, *tmp;
         iter_old = deferred_old;
         while (iter_old) {
                 print_ssdiff_line("del", iter_old->line_no,
                                   iter_old->line, -1, NULL, 0);
                 tmp = iter_old->next;
                 free(iter_old);
                 iter_old = tmp;
         }
 }
 
 static void print_deferred_new_lines()
 {
         struct deferred_lines *iter_new, *tmp;
         iter_new = deferred_new;
         while (iter_new) {
                 print_ssdiff_line("add", -1, NULL,
                                   iter_new->line_no, iter_new->line, 0);
                 tmp = iter_new->next;
                 free(iter_new);
                 iter_new = tmp;
         }
 }
 
 static void print_deferred_changed_lines()
 {
         struct deferred_lines *iter_old, *iter_new, *tmp;
         int n_old_lines = calc_deferred_lines(deferred_old);
         int n_new_lines = calc_deferred_lines(deferred_new);
         int individual_chars = (n_old_lines == n_new_lines ? 1 : 0);
 
         iter_old = deferred_old;
         iter_new = deferred_new;
         while (iter_old || iter_new) {
                 if (iter_old && iter_new)
                         print_ssdiff_line("changed", iter_old->line_no,
                                           iter_old->line,
                                           iter_new->line_no, iter_new->line,
                                           individual_chars);
                 else if (iter_old)
                         print_ssdiff_line("changed", iter_old->line_no,
                                           iter_old->line, -1, NULL, 0);
                 else if (iter_new)
                         print_ssdiff_line("changed", -1, NULL,
                                           iter_new->line_no, iter_new->line, 0);
                 if (iter_old) {
                         tmp = iter_old->next;
                         free(iter_old);
                         iter_old = tmp;
                 }
 
                 if (iter_new) {
                         tmp = iter_new->next;
                         free(iter_new);
                         iter_new = tmp;
                 }
         }
 }
 
 void cgit_ssdiff_print_deferred_lines()
 {
         if (!deferred_old && !deferred_new)
                 return;
         if (deferred_old && !deferred_new)
                 print_deferred_old_lines();
         else if (!deferred_old && deferred_new)
                 print_deferred_new_lines();
         else
                 print_deferred_changed_lines();
         deferred_old = deferred_old_last = NULL;
         deferred_new = deferred_new_last = NULL;
 }
 
 /*
  * print a single line returned from xdiff
  */
 void cgit_ssdiff_line_cb(char *line, int len)
 {
         char c = line[len - 1];
         line[len - 1] = '\0';
         if (line[0] == '@') {
                 current_old_line = line_from_hunk(line, '-');
                 current_new_line = line_from_hunk(line, '+');
         }
 
         if (line[0] == ' ') {
                 if (deferred_old || deferred_new)
                         cgit_ssdiff_print_deferred_lines();
                 print_ssdiff_line("ctx", current_old_line, line,
                                   current_new_line, line, 0);
                 current_old_line += 1;
                 current_new_line += 1;
         } else if (line[0] == '+') {
                 deferred_new_add(line, current_new_line);
                 current_new_line += 1;
         } else if (line[0] == '-') {
                 deferred_old_add(line, current_old_line);
                 current_old_line += 1;
         } else if (line[0] == '@') {
                 html("<tr><td colspan='4' class='hunk'>");
                 html_txt(line);
                 html("</td></tr>");
         } else {
                 html("<tr><td colspan='4' class='ctx'>");
                 html_txt(line);
                 html("</td></tr>");
         }
         line[len - 1] = c;
 }
 
 void cgit_ssdiff_header_begin()
 {
         current_old_line = -1;
         current_new_line = -1;
         html("<tr><td class='space' colspan='4'><div></div></td></tr>");
         html("<tr><td class='head' colspan='4'>");
 }
 
 void cgit_ssdiff_header_end()
 {
         html("</td><tr>");
 }
 
 void cgit_ssdiff_footer()
 {
         if (deferred_old || deferred_new)
                 cgit_ssdiff_print_deferred_lines();
         html("<tr><td class='foot' colspan='4'></td></tr>");
 }