diff options
Diffstat (limited to 'ui-diff.c')
| -rw-r--r-- | ui-diff.c | 501 |
1 files changed, 501 insertions, 0 deletions
diff --git a/ui-diff.c b/ui-diff.c new file mode 100644 index 000000000000..c60aefd1d629 --- /dev/null +++ b/ui-diff.c @@ -0,0 +1,501 @@ +/* ui-diff.c: show diff between two blobs + * + * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com> + * + * Licensed under GNU General Public License v2 + * (see COPYING for full license text) + */ + +#include "cgit.h" +#include "ui-diff.h" +#include "html.h" +#include "ui-shared.h" +#include "ui-ssdiff.h" + +struct object_id old_rev_oid[1]; +struct object_id new_rev_oid[1]; + +static int files, slots; +static int total_adds, total_rems, max_changes; +static int lines_added, lines_removed; + +static struct fileinfo { + char status; + struct object_id old_oid[1]; + struct object_id new_oid[1]; + unsigned short old_mode; + unsigned short new_mode; + char *old_path; + char *new_path; + unsigned int added; + unsigned int removed; + unsigned long old_size; + unsigned long new_size; + unsigned int binary:1; +} *items; + +static int use_ssdiff = 0; +static struct diff_filepair *current_filepair; +static const char *current_prefix; + +struct diff_filespec *cgit_get_current_old_file(void) +{ + return current_filepair->one; +} + +struct diff_filespec *cgit_get_current_new_file(void) +{ + return current_filepair->two; +} + +static void print_fileinfo(struct fileinfo *info) +{ + char *class; + + switch (info->status) { + case DIFF_STATUS_ADDED: + class = "add"; + break; + case DIFF_STATUS_COPIED: + class = "cpy"; + break; + case DIFF_STATUS_DELETED: + class = "del"; + break; + case DIFF_STATUS_MODIFIED: + class = "upd"; + break; + case DIFF_STATUS_RENAMED: + class = "mov"; + break; + case DIFF_STATUS_TYPE_CHANGED: + class = "typ"; + break; + case DIFF_STATUS_UNKNOWN: + class = "unk"; + break; + case DIFF_STATUS_UNMERGED: + class = "stg"; + break; + default: + die("bug: unhandled diff status %c", info->status); + } + + html("<tr>"); + html("<td class='mode'>"); + if (is_null_oid(info->new_oid)) { + cgit_print_filemode(info->old_mode); + } else { + cgit_print_filemode(info->new_mode); + } + + if (info->old_mode != info->new_mode && + !is_null_oid(info->old_oid) && + !is_null_oid(info->new_oid)) { + html("<span class='modechange'>["); + cgit_print_filemode(info->old_mode); + html("]</span>"); + } + htmlf("</td><td class='%s'>", class); + cgit_diff_link(info->new_path, NULL, NULL, ctx.qry.head, ctx.qry.sha1, + ctx.qry.sha2, info->new_path); + if (info->status == DIFF_STATUS_COPIED || info->status == DIFF_STATUS_RENAMED) { + htmlf(" (%s from ", + info->status == DIFF_STATUS_COPIED ? "copied" : "renamed"); + html_txt(info->old_path); + html(")"); + } + html("</td><td class='right'>"); + if (info->binary) { + htmlf("bin</td><td class='graph'>%ld -> %ld bytes", + info->old_size, info->new_size); + return; + } + htmlf("%d", info->added + info->removed); + html("</td><td class='graph'>"); + htmlf("<table summary='file diffstat' width='%d%%'><tr>", (max_changes > 100 ? 100 : max_changes)); + htmlf("<td class='add' style='width: %.1f%%;'/>", + info->added * 100.0 / max_changes); + htmlf("<td class='rem' style='width: %.1f%%;'/>", + info->removed * 100.0 / max_changes); + htmlf("<td class='none' style='width: %.1f%%;'/>", + (max_changes - info->removed - info->added) * 100.0 / max_changes); + html("</tr></table></td></tr>\n"); +} + +static void count_diff_lines(char *line, int len) +{ + if (line && (len > 0)) { + if (line[0] == '+') + lines_added++; + else if (line[0] == '-') + lines_removed++; + } +} + +static int show_filepair(struct diff_filepair *pair) +{ + /* Always show if we have no limiting prefix. */ + if (!current_prefix) + return 1; + + /* Show if either path in the pair begins with the prefix. */ + if (starts_with(pair->one->path, current_prefix) || + starts_with(pair->two->path, current_prefix)) + return 1; + + /* Otherwise we don't want to show this filepair. */ + return 0; +} + +static void inspect_filepair(struct diff_filepair *pair) +{ + int binary = 0; + unsigned long old_size = 0; + unsigned long new_size = 0; + + if (!show_filepair(pair)) + return; + + files++; + lines_added = 0; + lines_removed = 0; + cgit_diff_files(&pair->one->oid, &pair->two->oid, &old_size, &new_size, + &binary, 0, ctx.qry.ignorews, count_diff_lines); + if (files >= slots) { + if (slots == 0) + slots = 4; + else + slots = slots * 2; + items = xrealloc(items, slots * sizeof(struct fileinfo)); + } + items[files-1].status = pair->status; + oidcpy(items[files-1].old_oid, &pair->one->oid); + oidcpy(items[files-1].new_oid, &pair->two->oid); + items[files-1].old_mode = pair->one->mode; + items[files-1].new_mode = pair->two->mode; + items[files-1].old_path = xstrdup(pair->one->path); + items[files-1].new_path = xstrdup(pair->two->path); + items[files-1].added = lines_added; + items[files-1].removed = lines_removed; + items[files-1].old_size = old_size; + items[files-1].new_size = new_size; + items[files-1].binary = binary; + if (lines_added + lines_removed > max_changes) + max_changes = lines_added + lines_removed; + total_adds += lines_added; + total_rems += lines_removed; +} + +static void cgit_print_diffstat(const struct object_id *old_oid, + const struct object_id *new_oid, + const char *prefix) +{ + int i; + + html("<div class='diffstat-header'>"); + cgit_diff_link("Diffstat", NULL, NULL, ctx.qry.head, ctx.qry.sha1, + ctx.qry.sha2, NULL); + if (prefix) { + html(" (limited to '"); + html_txt(prefix); + html("')"); + } + html("</div>"); + html("<table summary='diffstat' class='diffstat'>"); + max_changes = 0; + cgit_diff_tree(old_oid, new_oid, inspect_filepair, prefix, + ctx.qry.ignorews); + for (i = 0; i<files; i++) + print_fileinfo(&items[i]); + html("</table>"); + html("<div class='diffstat-summary'>"); + htmlf("%d files changed, %d insertions, %d deletions", + files, total_adds, total_rems); + html("</div>"); +} + + +/* + * 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; +} + +static void header(const struct object_id *oid1, char *path1, int mode1, + const struct object_id *oid2, char *path2, int mode2) +{ + char *abbrev1, *abbrev2; + int subproject; + + subproject = (S_ISGITLINK(mode1) || S_ISGITLINK(mode2)); + html("<div class='head'>"); + html("diff --git a/"); + html_txt(path1); + html(" b/"); + html_txt(path2); + + if (mode1 == 0) + htmlf("<br/>new file mode %.6o", mode2); + + if (mode2 == 0) + htmlf("<br/>deleted file mode %.6o", mode1); + + if (!subproject) { + abbrev1 = xstrdup(find_unique_abbrev(oid1, DEFAULT_ABBREV)); + abbrev2 = xstrdup(find_unique_abbrev(oid2, DEFAULT_ABBREV)); + htmlf("<br/>index %s..%s", abbrev1, abbrev2); + free(abbrev1); + free(abbrev2); + if (mode1 != 0 && mode2 != 0) { + htmlf(" %.6o", mode1); + if (mode2 != mode1) + htmlf("..%.6o", mode2); + } + if (is_null_oid(oid1)) { + path1 = "dev/null"; + html("<br/>--- /"); + } else + html("<br/>--- a/"); + if (mode1 != 0) + cgit_tree_link(path1, NULL, NULL, ctx.qry.head, + oid_to_hex(old_rev_oid), path1); + else + html_txt(path1); + if (is_null_oid(oid2)) { + path2 = "dev/null"; + html("<br/>+++ /"); + } else + html("<br/>+++ b/"); + if (mode2 != 0) + cgit_tree_link(path2, NULL, NULL, ctx.qry.head, + oid_to_hex(new_rev_oid), path2); + else + html_txt(path2); + } + html("</div>"); +} + +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; + + if (!show_filepair(pair)) + return; + + current_filepair = pair; + if (use_ssdiff) { + cgit_ssdiff_header_begin(); + print_line_fn = cgit_ssdiff_line_cb; + } + header(&pair->one->oid, pair->one->path, pair->one->mode, + &pair->two->oid, pair->two->path, pair->two->mode); + if (use_ssdiff) + cgit_ssdiff_header_end(); + if (S_ISGITLINK(pair->one->mode) || S_ISGITLINK(pair->two->mode)) { + if (S_ISGITLINK(pair->one->mode)) + print_line_fn(fmt("-Subproject %s", oid_to_hex(&pair->one->oid)), 52); + if (S_ISGITLINK(pair->two->mode)) + print_line_fn(fmt("+Subproject %s", oid_to_hex(&pair->two->oid)), 52); + if (use_ssdiff) + cgit_ssdiff_footer(); + return; + } + if (cgit_diff_files(&pair->one->oid, &pair->two->oid, &old_size, + &new_size, &binary, ctx.qry.context, + ctx.qry.ignorews, print_line_fn)) + cgit_print_error("Error running diff"); + if (binary) { + if (use_ssdiff) + html("<tr><td colspan='4'>Binary files differ</td></tr>"); + else + html("Binary files differ"); + } + if (use_ssdiff) + cgit_ssdiff_footer(); +} + +void cgit_print_diff_ctrls(void) +{ + int i, curr; + + html("<div class='cgit-panel'>"); + html("<b>diff options</b>"); + html("<form method='get'>"); + cgit_add_hidden_formfields(1, 0, ctx.qry.page); + html("<table>"); + html("<tr><td colspan='2'/></tr>"); + html("<tr>"); + html("<td class='label'>context:</td>"); + html("<td class='ctrl'>"); + html("<select name='context' onchange='this.form.submit();'>"); + curr = ctx.qry.context; + if (!curr) + curr = 3; + for (i = 1; i <= 10; i++) + html_intoption(i, fmt("%d", i), curr); + for (i = 15; i <= 40; i += 5) + html_intoption(i, fmt("%d", i), curr); + html("</select>"); + html("</td>"); + html("</tr><tr>"); + html("<td class='label'>space:</td>"); + html("<td class='ctrl'>"); + html("<select name='ignorews' onchange='this.form.submit();'>"); + html_intoption(0, "include", ctx.qry.ignorews); + html_intoption(1, "ignore", ctx.qry.ignorews); + html("</select>"); + html("</td>"); + html("</tr><tr>"); + html("<td class='label'>mode:</td>"); + html("<td class='ctrl'>"); + html("<select name='dt' onchange='this.form.submit();'>"); + curr = ctx.qry.has_difftype ? ctx.qry.difftype : ctx.cfg.difftype; + html_intoption(0, "unified", curr); + html_intoption(1, "ssdiff", curr); + html_intoption(2, "stat only", curr); + html("</select></td></tr>"); + html("<tr><td/><td class='ctrl'>"); + html("<noscript><input type='submit' value='reload'/></noscript>"); + html("</td></tr></table>"); + html("</form>"); + html("</div>"); +} + +void cgit_print_diff(const char *new_rev, const char *old_rev, + const char *prefix, int show_ctrls, int raw) +{ + struct commit *commit, *commit2; + const struct object_id *old_tree_oid, *new_tree_oid; + diff_type difftype; + + /* + * If "follow" is set then the diff machinery needs to examine the + * entire commit to detect renames so we must limit the paths in our + * own callbacks and not pass the prefix to the diff machinery. + */ + if (ctx.qry.follow && ctx.cfg.enable_follow_links) { + current_prefix = prefix; + prefix = ""; + } else { + current_prefix = NULL; + } + + if (!new_rev) + new_rev = ctx.qry.head; + if (get_oid(new_rev, new_rev_oid)) { + cgit_print_error_page(404, "Not found", + "Bad object name: %s", new_rev); + return; + } + commit = lookup_commit_reference(the_repository, new_rev_oid); + if (!commit || parse_commit(commit)) { + cgit_print_error_page(404, "Not found", + "Bad commit: %s", oid_to_hex(new_rev_oid)); + return; + } + new_tree_oid = &commit->maybe_tree->object.oid; + + if (old_rev) { + if (get_oid(old_rev, old_rev_oid)) { + cgit_print_error_page(404, "Not found", + "Bad object name: %s", old_rev); + return; + } + } else if (commit->parents && commit->parents->item) { + oidcpy(old_rev_oid, &commit->parents->item->object.oid); + } else { + oidclr(old_rev_oid); + } + + if (!is_null_oid(old_rev_oid)) { + commit2 = lookup_commit_reference(the_repository, old_rev_oid); + if (!commit2 || parse_commit(commit2)) { + cgit_print_error_page(404, "Not found", + "Bad commit: %s", oid_to_hex(old_rev_oid)); + return; + } + old_tree_oid = &commit2->maybe_tree->object.oid; + } else { + old_tree_oid = NULL; + } + + if (raw) { + struct diff_options diffopt; + + diff_setup(&diffopt); + diffopt.output_format = DIFF_FORMAT_PATCH; + diffopt.flags.recursive = 1; + diff_setup_done(&diffopt); + + ctx.page.mimetype = "text/plain"; + cgit_print_http_headers(); + if (old_tree_oid) { + diff_tree_oid(old_tree_oid, new_tree_oid, "", + &diffopt); + } else { + diff_root_tree_oid(new_tree_oid, "", &diffopt); + } + diffcore_std(&diffopt); + diff_flush(&diffopt); + + return; + } + + difftype = ctx.qry.has_difftype ? ctx.qry.difftype : ctx.cfg.difftype; + use_ssdiff = difftype == DIFF_SSDIFF; + + if (show_ctrls) { + cgit_print_layout_start(); + cgit_print_diff_ctrls(); + } + + /* + * Clicking on a link to a file in the diff stat should show a diff + * of the file, showing the diff stat limited to a single file is + * pretty useless. All links from this point on will be to + * individual files, so we simply reset the difftype in the query + * here to avoid propagating DIFF_STATONLY to the individual files. + */ + if (difftype == DIFF_STATONLY) + ctx.qry.difftype = ctx.cfg.difftype; + + cgit_print_diffstat(old_rev_oid, new_rev_oid, prefix); + + if (difftype == DIFF_STATONLY) + return; + + if (use_ssdiff) { + html("<table summary='ssdiff' class='ssdiff'>"); + } else { + html("<table summary='diff' class='diff'>"); + html("<tr><td>"); + } + cgit_diff_tree(old_rev_oid, new_rev_oid, filepair_cb, prefix, + ctx.qry.ignorews); + if (!use_ssdiff) + html("</td></tr>"); + html("</table>"); + + if (show_ctrls) + cgit_print_layout_end(); +} |