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Remember cursor position in ancestor directories

This commit is contained in:
Přemysl Eric Janouch 2018-11-01 18:25:38 +01:00
parent c9bffc6046
commit e4af5b4147
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 50 additions and 17 deletions
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67
sdn.cpp
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@ -305,20 +305,6 @@ enum { ALT = 1 << 24, SYM = 1 << 25 }; // Outside the range of Unicode
#define KEY(name) (SYM | KEY_ ## name)
#define CTRL 31 &
struct entry {
string filename, target_path;
struct stat info = {}, target_info = {};
enum { MODES, USER, GROUP, SIZE, MTIME, FILENAME, COLUMNS };
ncstring cols[COLUMNS];
auto operator< (const entry &other) -> bool {
auto a = S_ISDIR (info.st_mode);
auto b = S_ISDIR (other.info.st_mode);
return (a && !b) || (a == b && filename < other.filename);
}
};
#define ACTIONS(XX) XX(NONE) XX(CHOOSE) XX(CHOOSE_FULL) XX(HELP) XX(QUIT) \
XX(UP) XX(DOWN) XX(TOP) XX(BOTTOM) XX(PAGE_PREVIOUS) XX(PAGE_NEXT) \
XX(SCROLL_UP) XX(SCROLL_DOWN) XX(GO_START) XX(GO_HOME) \
@ -383,10 +369,30 @@ struct stringcaseless {
}
};
struct entry {
string filename, target_path;
struct stat info = {}, target_info = {};
enum { MODES, USER, GROUP, SIZE, MTIME, FILENAME, COLUMNS };
ncstring cols[COLUMNS];
auto operator< (const entry &other) -> bool {
auto a = S_ISDIR (info.st_mode);
auto b = S_ISDIR (other.info.st_mode);
return (a && !b) || (a == b && filename < other.filename);
}
};
struct level {
int offset, cursor; ///< Scroll offset and cursor position
string path, filename; ///< Level path and filename at cursor
};
static struct {
string cwd; ///< Current working directory
string start_dir; ///< Starting directory
vector<entry> entries; ///< Current directory entries
vector<level> levels; ///< Upper directory levels
int offset, cursor; ///< Scroll offset and cursor position
bool full_view; ///< Show extended information
int max_widths[entry::COLUMNS]; ///< Column widths
@ -726,13 +732,40 @@ fun search (const wstring &needle) {
g.cursor = best;
}
fun is_ancestor_dir (const string &ancestor, const string &of) -> bool {
if (strncmp (ancestor.c_str (), of.c_str (), ancestor.length ()))
return false;
return of.c_str ()[ancestor.length ()] == '/'
|| (ancestor == "/" && ancestor != of);
}
fun change_dir (const string &path) {
if (chdir (path.c_str ())) {
beep ();
return;
}
level last {g.offset, g.cursor, g.cwd, g.entries[g.cursor].filename};
reload ();
if (is_ancestor_dir (last.path, g.cwd)) {
g.levels.push_back (last);
g.offset = g.cursor = 0;
} else {
// TODO: remember cursor going down, then restore going up
g.cursor = 0;
reload ();
string anchor;
auto i = g.levels.rbegin ();
while (i != g.levels.rend () && !is_ancestor_dir (i->path, g.cwd)) {
if (i->path == g.cwd) {
g.offset = i->offset;
g.cursor = i->cursor;
anchor = i->filename;
}
i++;
g.levels.pop_back ();
}
if (!anchor.empty () && (g.cursor >= g.entries.size ()
|| g.entries[g.cursor].filename != anchor))
search (to_wide (anchor));
}
}