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Finish copying the GNU ls coloring algorithm

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Přemysl Eric Janouch 2018-10-25 17:26:36 +02:00
parent 1ba2709fda
commit 6e34f480a9
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 38 additions and 20 deletions
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58
sdn.cpp
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@ -318,6 +318,7 @@ static struct {
map<int, chtype> ls_colors; ///< LS_COLORS decoded
map<string, chtype> ls_exts; ///< LS_COLORS file extensions
bool ls_symlink_as_target; ///< ln=target in dircolors
// Refreshed by reload():
@ -326,17 +327,34 @@ static struct {
struct tm now; ///< Current local time for display
} g;
fun ls_format (const string &filename, const struct stat &info) -> chtype {
// The coloring logic has been more or less exactly copied from GNU ls,
// simplified and rewritten to reflect local implementation specifics
fun ls_is_colored (int type) -> bool {
auto i = g.ls_colors.find (type);
return i != g.ls_colors.end () && i->second != 0;
}
fun ls_format (const entry &e, bool for_target) -> chtype {
int type = LS_ORPHAN;
auto set = [&](int t) { if (g.ls_colors.count (t)) type = t; };
// TODO: LS_MISSING if available and this is a missing symlink target
if (S_ISREG (info.st_mode)) {
auto set = [&](int t) { if (ls_is_colored (t)) type = t; };
const auto &name = for_target
? e.target_path : e.filename;
const auto &info =
(for_target || (g.ls_symlink_as_target && e.target_info.st_mode))
? e.target_info : e.info;
if (for_target && info.st_mode == 0) {
// This differs from GNU ls: we use ORPHAN when MISSING is not set,
// but GNU ls colors by dirent::d_type
set (LS_MISSING);
} else if (S_ISREG (info.st_mode)) {
type = LS_FILE;
if (info.st_nlink > 1)
set (LS_MULTIHARDLINK);
if ((info.st_mode & (S_IXUSR | S_IXGRP | S_IXOTH)))
set (LS_EXECUTABLE);
if (lgetxattr (filename.c_str (), "security.capability", NULL, 0) >= 0)
if (lgetxattr (name.c_str (), "security.capability", NULL, 0) >= 0)
set (LS_CAPABILITY);
if ((info.st_mode & S_ISGID))
set (LS_SETGID);
@ -351,10 +369,10 @@ fun ls_format (const string &filename, const struct stat &info) -> chtype {
if ((info.st_mode & S_ISVTX) && (info.st_mode & S_IWOTH))
set (LS_STICKY_OTHER_WRITABLE);
} else if (S_ISLNK (info.st_mode)) {
// TODO: LS_ORPHAN when symlink target is missing and either
// a/ "li" is "target", or
// b/ LS_ORPHAN is available
type = LS_SYMLINK;
if (!e.target_info.st_mode
&& (ls_is_colored (LS_ORPHAN) || g.ls_symlink_as_target))
type = LS_ORPHAN;
} else if (S_ISFIFO (info.st_mode)) {
type = LS_FIFO;
} else if (S_ISSOCK (info.st_mode)) {
@ -370,9 +388,9 @@ fun ls_format (const string &filename, const struct stat &info) -> chtype {
if (x != g.ls_colors.end ())
format = x->second;
auto dot = filename.find_last_of ('.');
auto dot = name.find_last_of ('.');
if (dot != string::npos && type == LS_FILE) {
const auto x = g.ls_exts.find (filename.substr (++dot));
const auto x = g.ls_exts.find (name.substr (++dot));
if (x != g.ls_exts.end ())
format = x->second;
}
@ -395,8 +413,8 @@ fun make_entry (const struct dirent *f) -> entry {
e.cols[entry::USER] = e.cols[entry::GROUP] =
e.cols[entry::SIZE] = e.cols[entry::MTIME] = apply_attrs (L"?", 0);
auto format = ls_format (e.filename, info);
e.cols[entry::FILENAME] = apply_attrs (to_wide (e.filename), format);
e.cols[entry::FILENAME] =
apply_attrs (to_wide (e.filename), ls_format (e, false));
return e;
}
@ -407,7 +425,8 @@ fun make_entry (const struct dirent *f) -> entry {
e.target_path = "?";
} else {
e.target_path = buf;
(void) lstat (buf, &e.target_info);
// If a symlink links to another symlink, we follow all the way
(void) stat (buf, &e.target_info);
}
}
@ -441,11 +460,10 @@ fun make_entry (const struct dirent *f) -> entry {
e.cols[entry::MTIME] = apply_attrs (to_wide (buf), 0);
auto &fn = e.cols[entry::FILENAME] =
apply_attrs (to_wide (e.filename), ls_format (e.filename, info));
apply_attrs (to_wide (e.filename), ls_format (e, false));
if (!e.target_path.empty ()) {
fn.append (apply_attrs (to_wide (" -> "), 0));
fn.append (apply_attrs (to_wide (e.target_path),
ls_format (e.target_path, e.target_info)));
fn.append (apply_attrs (to_wide (e.target_path), ls_format (e, true)));
}
return e;
}
@ -767,11 +785,11 @@ fun load_ls_colors (vector<string> colors) {
auto equal = pair.find ('=');
if (equal == string::npos)
continue;
attrs[pair.substr (0, equal)] =
decode_ansi_sgr (split (pair.substr (equal + 1), ";"));
auto key = pair.substr (0, equal), value = pair.substr (equal + 1);
if (key != g_ls_colors[LS_SYMLINK]
|| !(g.ls_symlink_as_target = value == "target"))
attrs[key] = decode_ansi_sgr (split (value, ";"));
}
// `LINK target` i.e. `ln=target` is not supported now
for (int i = 0; i < LS_COUNT; i++) {
auto m = attrs.find (g_ls_colors[i]);
if (m != attrs.end ())