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#include "cgit.h"
#include "html.h"
#include "ui-shared.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 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 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_ssdiff_line(char *class, int old_line_no, char *old_line,
int new_line_no, char *new_line)
{
html("<tr>");
if (old_line_no > 0)
htmlf("<td class='%s'>%d </td><td class='%s'>", class,
old_line_no, class);
else
htmlf("<td class='%s_dark'> </td><td class='%s_dark'>", class, class);
if (old_line) {
old_line = replace_tabs(old_line + 1);
html_txt(old_line);
free(old_line);
}
html(" </td>");
if (new_line_no > 0)
htmlf("<td class='%s'> %d </td><td class='%s'>", class,
new_line_no, class);
else
htmlf("<td class='%s_dark'> </td><td class='%s_dark'>", class, class);
if (new_line) {
new_line = replace_tabs(new_line + 1);
html_txt(new_line);
free(new_line);
}
html("</td></tr>");
}
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);
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);
tmp = iter_new->next;
free(iter_new);
iter_new = tmp;
}
}
static void print_deferred_changed_lines()
{
struct deferred_lines *iter_old, *iter_new, *tmp;
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);
else if (iter_old)
print_ssdiff_line("changed", iter_old->line_no,
iter_old->line, -1, NULL);
else if (iter_new)
print_ssdiff_line("changed", -1, NULL,
iter_new->line_no, iter_new->line);
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);
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()
{
current_old_line = 0;
current_new_line = 0;
html("<table class='ssdiff'>");
}
void cgit_ssdiff_footer()
{
if (deferred_old || deferred_new)
cgit_ssdiff_print_deferred_lines();
html("</table>");
}
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