Add basic diff view

Finally, xdiff is used to show per-file diffs via commit view.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>
This commit is contained in:
Lars Hjemli 2006-12-20 22:48:27 +01:00
parent a53042865a
commit 36aba00273
7 changed files with 270 additions and 1 deletions

View File

@ -6,7 +6,7 @@ CACHE_ROOT = /var/cache/cgit
EXTLIBS = ../git/libgit.a ../git/xdiff/lib.a -lz -lcrypto
OBJECTS = shared.o cache.o parsing.o html.o ui-shared.o ui-repolist.o \
ui-summary.o ui-log.o ui-view.c ui-tree.c ui-commit.c
ui-summary.o ui-log.o ui-view.c ui-tree.c ui-commit.c ui-diff.o
CFLAGS += -Wall

2
cgit.c
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@ -36,6 +36,8 @@ static void cgit_print_repo_page(struct cacheitem *item)
cgit_print_commit(cgit_query_sha1);
} else if (!strcmp(cgit_query_page, "view")) {
cgit_print_view(cgit_query_sha1);
} else if (!strcmp(cgit_query_page, "diff")) {
cgit_print_diff(cgit_query_sha1, cgit_query_sha2);
}
cgit_print_docend();
}

View File

@ -77,12 +77,18 @@ div.error {
font-weight: bold;
margin: 1em 2em;
}
div.ls-blob, div.ls-dir {
font-family: monospace;
}
div.ls-dir a {
font-weight: bold;
}
th.filesize, td.filesize {
text-align: right;
}
td.filesize {
font-family: monospace;
}
td.filemode {
font-family: monospace;
}
@ -154,6 +160,25 @@ table.diffstat td.summary {
color: #888;
padding-top: 0.5em;
}
table.diff td {
border: solid 1px black;
font-family: monospace;
white-space: pre;
}
table.diff td div.hunk {
background: #ccc;
}
table.diff td div.add {
color: green;
}
table.diff td div.del {
color: red;
}
.sha1 {
font-family: courier;
font-size: 90%;

2
cgit.h
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@ -57,6 +57,7 @@ extern char *cgit_query_repo;
extern char *cgit_query_page;
extern char *cgit_query_head;
extern char *cgit_query_sha1;
extern char *cgit_query_sha2;
extern int cgit_query_ofs;
extern int htmlfd;
@ -104,5 +105,6 @@ extern void cgit_print_log(const char *tip, int ofs, int cnt);
extern void cgit_print_view(const char *hex);
extern void cgit_print_tree(const char *hex);
extern void cgit_print_commit(const char *hex);
extern void cgit_print_diff(const char *old_hex, const char *new_hex);
#endif /* CGIT_H */

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@ -37,6 +37,7 @@ char *cgit_query_repo = NULL;
char *cgit_query_page = NULL;
char *cgit_query_head = NULL;
char *cgit_query_sha1 = NULL;
char *cgit_query_sha2 = NULL;
int cgit_query_ofs = 0;
int htmlfd = 0;
@ -83,6 +84,9 @@ void cgit_querystring_cb(const char *name, const char *value)
} else if (!strcmp(name, "id")) {
cgit_query_sha1 = xstrdup(value);
cgit_query_has_sha1 = 1;
} else if (!strcmp(name, "id2")) {
cgit_query_sha2 = xstrdup(value);
cgit_query_has_sha1 = 1;
} else if (!strcmp(name, "ofs")) {
cgit_query_ofs = atoi(value);
}

131
ui-diff.c Normal file
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@ -0,0 +1,131 @@
/* ui-diff.c: show diff between two blobs
*
* Copyright (C) 2006 Lars Hjemli
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
#include "xdiff.h"
char *diff_buffer;
int diff_buffer_size;
/*
* print a single line returned from xdiff
*/
static void print_line(char *line, int len)
{
char *class = "ctx";
char c = line[len-1];
if (line[0] == '+')
class = "add";
else if (line[0] == '-')
class = "del";
else if (line[0] == '@')
class = "hunk";
htmlf("<div class='%s'>", class);
line[len-1] = '\0';
html_txt(line);
html("</div>");
line[len-1] = c;
}
/*
* Receive diff-buffers from xdiff and concatenate them as
* needed across multiple callbacks.
*
* This is basically a copy of xdiff-interface.c/xdiff_outf(),
* ripped from git and modified to use globals instead of
* a special callback-struct.
*/
int diff_cb(void *priv_, mmbuffer_t *mb, int nbuf)
{
int i;
for (i = 0; i < nbuf; i++) {
if (mb[i].ptr[mb[i].size-1] != '\n') {
/* Incomplete line */
diff_buffer = xrealloc(diff_buffer,
diff_buffer_size + mb[i].size);
memcpy(diff_buffer + diff_buffer_size,
mb[i].ptr, mb[i].size);
diff_buffer_size += mb[i].size;
continue;
}
/* we have a complete line */
if (!diff_buffer) {
print_line(mb[i].ptr, mb[i].size);
continue;
}
diff_buffer = xrealloc(diff_buffer,
diff_buffer_size + mb[i].size);
memcpy(diff_buffer + diff_buffer_size, mb[i].ptr, mb[i].size);
print_line(diff_buffer, diff_buffer_size + mb[i].size);
free(diff_buffer);
diff_buffer = NULL;
diff_buffer_size = 0;
}
if (diff_buffer) {
print_line(diff_buffer, diff_buffer_size);
free(diff_buffer);
diff_buffer = NULL;
diff_buffer_size = 0;
}
return 0;
}
static int load_mmfile(mmfile_t *file, const unsigned char *sha1)
{
char type[20];
if (is_null_sha1(sha1)) {
file->ptr = (char *)"";
file->size = 0;
} else {
file->ptr = read_sha1_file(sha1, type, &file->size);
}
return 1;
}
static void run_diff(const unsigned char *sha1, const unsigned char *sha2)
{
mmfile_t file1, file2;
xpparam_t diff_params;
xdemitconf_t emit_params;
xdemitcb_t emit_cb;
if (!load_mmfile(&file1, sha1) || !load_mmfile(&file2, sha2)) {
cgit_print_error("Unable to load files for diff");
return;
}
diff_params.flags = XDF_NEED_MINIMAL;
emit_params.ctxlen = 3;
emit_params.flags = XDL_EMIT_FUNCNAMES;
emit_cb.outf = diff_cb;
xdl_diff(&file1, &file2, &diff_params, &emit_params, &emit_cb);
}
void cgit_print_diff(const char *old_hex, const char *new_hex)
{
unsigned char sha1[20], sha2[20];
get_sha1(old_hex, sha1);
get_sha1(new_hex, sha2);
html("<h2>diff</h2>\n");
html("<table class='diff'><tr><td>");
run_diff(sha1, sha2);
html("</td></tr></table>");
}

105
xdiff.h Normal file
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@ -0,0 +1,105 @@
/*
* LibXDiff by Davide Libenzi ( File Differential Library )
* Copyright (C) 2003 Davide Libenzi
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Davide Libenzi <davidel@xmailserver.org>
*
*/
#if !defined(XDIFF_H)
#define XDIFF_H
#ifdef __cplusplus
extern "C" {
#endif /* #ifdef __cplusplus */
#define XDF_NEED_MINIMAL (1 << 1)
#define XDF_IGNORE_WHITESPACE (1 << 2)
#define XDF_IGNORE_WHITESPACE_CHANGE (1 << 3)
#define XDF_WHITESPACE_FLAGS (XDF_IGNORE_WHITESPACE | XDF_IGNORE_WHITESPACE_CHANGE)
#define XDL_PATCH_NORMAL '-'
#define XDL_PATCH_REVERSE '+'
#define XDL_PATCH_MODEMASK ((1 << 8) - 1)
#define XDL_PATCH_IGNOREBSPACE (1 << 8)
#define XDL_EMIT_FUNCNAMES (1 << 0)
#define XDL_EMIT_COMMON (1 << 1)
#define XDL_MMB_READONLY (1 << 0)
#define XDL_MMF_ATOMIC (1 << 0)
#define XDL_BDOP_INS 1
#define XDL_BDOP_CPY 2
#define XDL_BDOP_INSB 3
#define XDL_MERGE_MINIMAL 0
#define XDL_MERGE_EAGER 1
#define XDL_MERGE_ZEALOUS 2
typedef struct s_mmfile {
char *ptr;
long size;
} mmfile_t;
typedef struct s_mmbuffer {
char *ptr;
long size;
} mmbuffer_t;
typedef struct s_xpparam {
unsigned long flags;
} xpparam_t;
typedef struct s_xdemitcb {
void *priv;
int (*outf)(void *, mmbuffer_t *, int);
} xdemitcb_t;
typedef struct s_xdemitconf {
long ctxlen;
unsigned long flags;
} xdemitconf_t;
typedef struct s_bdiffparam {
long bsize;
} bdiffparam_t;
#define xdl_malloc(x) malloc(x)
#define xdl_free(ptr) free(ptr)
#define xdl_realloc(ptr,x) realloc(ptr,x)
void *xdl_mmfile_first(mmfile_t *mmf, long *size);
void *xdl_mmfile_next(mmfile_t *mmf, long *size);
long xdl_mmfile_size(mmfile_t *mmf);
int xdl_diff(mmfile_t *mf1, mmfile_t *mf2, xpparam_t const *xpp,
xdemitconf_t const *xecfg, xdemitcb_t *ecb);
int xdl_merge(mmfile_t *orig, mmfile_t *mf1, const char *name1,
mmfile_t *mf2, const char *name2,
xpparam_t const *xpp, int level, mmbuffer_t *result);
#ifdef __cplusplus
}
#endif /* #ifdef __cplusplus */
#endif /* #if !defined(XDIFF_H) */