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authorRagnar Ouchterlony <ragnar@lysator.liu.se>2009-09-13 21:36:35 +0400
committerLars Hjemli <hjemli@gmail.com>2009-09-16 22:17:56 +0400
commit40e174d5364910750413d94b5417e57d108190ef (patch)
tree21d71be66e1b058cecc45b861523c071fb4ee126
parent27479ac54c99584612f7246c9456119e88621eaa (diff)
First version of side-by-side diff.
This constitutes the first prototype of a side-by-side diff. It is not possible to switch between unidiff and side-by-side diff at all at this stage. Signed-off-by: Ragnar Ouchterlony <ragnar@lysator.liu.se> Signed-off-by: Lars Hjemli <hjemli@gmail.com>
-rw-r--r--Makefile1
-rw-r--r--cgit.css35
-rw-r--r--ui-diff.c15
-rw-r--r--ui-ssdiff.c264
-rw-r--r--ui-ssdiff.h12
5 files changed, 325 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index 60d8c58..cb7875e 100644
--- a/Makefile
+++ b/Makefile
@@ -90,6 +90,7 @@ OBJECTS += ui-refs.o
OBJECTS += ui-repolist.o
OBJECTS += ui-shared.o
OBJECTS += ui-snapshot.o
+OBJECTS += ui-ssdiff.o
OBJECTS += ui-stats.o
OBJECTS += ui-summary.o
OBJECTS += ui-tag.o
diff --git a/cgit.css b/cgit.css
index c47ebc9..bf58b8a 100644
--- a/cgit.css
+++ b/cgit.css
@@ -601,3 +601,38 @@ table.hgraph div.bar {
background-color: #eee;
height: 1em;
}
+
+table.ssdiff td.add {
+ color: black;
+ background: #afa;
+}
+
+table.ssdiff td.add_dark {
+ color: black;
+ background: #9c9;
+}
+
+table.ssdiff td.del {
+ color: black;
+ background: #faa;
+}
+
+table.ssdiff td.del_dark {
+ color: black;
+ background: #c99;
+}
+
+table.ssdiff td.changed {
+ color: black;
+ background: #ffa;
+}
+
+table.ssdiff td.changed_dark {
+ color: black;
+ background: #cc9;
+}
+
+table.ssdiff td.hunk {
+ color: #black;
+ background: #ccf;
+}
diff --git a/ui-diff.c b/ui-diff.c
index 2196745..0c6f8d7 100644
--- a/ui-diff.c
+++ b/ui-diff.c
@@ -9,6 +9,7 @@
#include "cgit.h"
#include "html.h"
#include "ui-shared.h"
+#include "ui-ssdiff.h"
unsigned char old_rev_sha1[20];
unsigned char new_rev_sha1[20];
@@ -32,6 +33,7 @@ static struct fileinfo {
int binary:1;
} *items;
+static int use_ssdiff = 0;
static void print_fileinfo(struct fileinfo *info)
{
@@ -244,6 +246,8 @@ static void header(unsigned char *sha1, char *path1, int mode1,
html_txt(path2);
}
html("</div>");
+ if (use_ssdiff)
+ cgit_ssdiff_header();
}
static void filepair_cb(struct diff_filepair *pair)
@@ -251,9 +255,14 @@ static void filepair_cb(struct diff_filepair *pair)
unsigned long old_size = 0;
unsigned long new_size = 0;
int binary = 0;
+ linediff_fn print_line_fn = print_line;
header(pair->one->sha1, pair->one->path, pair->one->mode,
pair->two->sha1, pair->two->path, pair->two->mode);
+ if (use_ssdiff) {
+ cgit_ssdiff_header();
+ print_line_fn = cgit_ssdiff_line_cb;
+ }
if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) {
if (S_ISGITLINK(pair->one->mode))
print_line(fmt("-Subproject %s", sha1_to_hex(pair->one->sha1)), 52);
@@ -261,11 +270,13 @@ static void filepair_cb(struct diff_filepair *pair)
print_line(fmt("+Subproject %s", sha1_to_hex(pair->two->sha1)), 52);
return;
}
- if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
- &new_size, &binary, print_line))
+ if (cgit_diff_files(pair->one->sha1, pair->two->sha1, &old_size,
+ &new_size, &binary, print_line_fn))
cgit_print_error("Error running diff");
if (binary)
html("Binary files differ");
+ if (use_ssdiff)
+ cgit_ssdiff_footer();
}
void cgit_print_diff(const char *new_rev, const char *old_rev, const char *prefix)
diff --git a/ui-ssdiff.c b/ui-ssdiff.c
new file mode 100644
index 0000000..3591ab4
--- /dev/null
+++ b/ui-ssdiff.c
@@ -0,0 +1,264 @@
+#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>");
+}
diff --git a/ui-ssdiff.h b/ui-ssdiff.h
new file mode 100644
index 0000000..a0b1efe
--- /dev/null
+++ b/ui-ssdiff.h
@@ -0,0 +1,12 @@
+#ifndef UI_SSDIFF_H
+#define UI_SSDIFF_H
+
+extern void cgit_ssdiff_print_deferred_lines();
+
+extern void cgit_ssdiff_line_cb(char *line, int len);
+
+extern void cgit_ssdiff_header();
+
+extern void cgit_ssdiff_footer();
+
+#endif /* UI_SSDIFF_H */