Fix #125

README.md

@@ -21,7 +21,7 @@ Noice is Not Noice, a noicer fork...
 
 <p align="center"><i>nnn in action! (click to play video)</i></a></p>
 
-`nnn` is probably the [fastest and most resource-sensitive](#performance) file manager you have ever used. It integrates seamlessly with your DE and favourite GUI utilities, has a unique [navigate-as-you-type](#navigate-as-you-type-mode) mode with auto-select, disk usage analyzer mode, bookmarks, familiar navigation shortcuts, subshell spawning and much more.
+`nnn` is probably the [fastest and most resource-sensitive](#performance) file manager you have ever used. It integrates seamlessly with your DE and favourite GUI utilities, has a unique [navigate-as-you-type](#navigate-as-you-type-mode) mode with auto-select, disk usage analyzer mode, bookmarks, contexts, familiar navigation shortcuts, subshell spawning and much more.
 
 [Integrate utilities](https://github.com/jarun/nnn#sample-scripts) like sxiv or fzy easily; `nnn` supports as many scripts as you need!
 
@@ -57,6 +57,7 @@ Have fun with it! Missing a feature? Want to contribute? Head to the rolling [To
 - [Quickstart](#quickstart)
 - [How to](#how-to)
   - [add bookmarks](#add-bookmarks)
+  - [contexts](#contexts)
   - [copy file paths](#copy-file-paths)
     - [selection shortcuts](#selection-shortcuts)
     - [default copy](#default-copy)
@@ -65,7 +66,6 @@ Have fun with it! Missing a feature? Want to contribute? Head to the rolling [To
   - [cd on quit](#cd-on-quit)
   - [run custom scripts](#run-custom-scripts)
     - [sample scripts](#sample-scripts)
-  - [dual-pane or multi-pane](#dual-pane-or-multi-pane)
   - [change dir color](#change-dir-color)
   - [integrate patool](#integrate-patool)
   - [work faster at rename prompt](#work-faster-at-rename-prompt)
@@ -83,6 +83,7 @@ Have fun with it! Missing a feature? Want to contribute? Head to the rolling [To
   - Familiar, easy shortcuts (arrows, `~`, `-`, `&`)
   - *Navigate-as-you-type* mode with dir auto-select for the maverick
   - Handy bookmarks, start at bookmark, pin and visit directory
+  - Multiple contexts
   - Roll-over at edges, page through entries
   - Show directories in custom color (default: enabled in blue)
 - Sorting
@@ -342,6 +343,18 @@ Set environment variable `NNN_BMS` as a string of `key:location` pairs (max 10)
 
 The bookmark prompt also understands the <kbd>~</kbd> (HOME), <kbd>-</kbd> (last visited directory) and <kbd>&</kbd> (start directory) shortcuts.
 
+#### contexts
+
+Contexts (aka _tabs_ aka _workspaces_) serve the purpose of exploring multiple directories in parallel. `nnn` provides 4 contexts simultaneously. The status of the contexts are shown in the top left corner:
+
+- the current context is in reverse
+- other used contexts are underlined
+- rest are unused
+
+The bookmark prompt understands contexts. To switch contexts press `^B` and enter the context number (1-4).
+
+The first time a context is entered, it copies the state of the last visited context. Each context remembers its start directory and last visited directory.
+
 #### copy file paths
 
 ##### selection shortcuts
@@ -477,10 +490,6 @@ Type the correct suffix  when prompted on pressing the keybind <kbd>R</kbd>. To
 
       xdg-open $(find -type f | fzy) >/dev/null 2>&1
 
-#### dual-pane or multi-pane
-
-`nnn` doesn't have a native dual-pane or multi-pane mode. On most modern DEs the default terminal emulator handles that. Other options are tmux, GNU Screen, Terminator, Tilix, AltYo and Byobu.
-
 #### change dir color
 
 The default color for directories is blue. Option `-c` accepts color codes from 0 to 7 to use a different color:

nnn.c

@@ -175,6 +175,7 @@ disabledbg()
 #define _ALIGNMENT_MASK 0xF
 #define SYMLINK_TO_DIR 0x1
 #define MAX_HOME_LEN 64
+#define MAX_CTX 4
 
 /* Macros to define process spawn behaviour as flags */
 #define F_NONE     0x00  /* no flag set */
@@ -240,26 +241,40 @@ typedef struct {
 
 /* Settings */
 typedef struct {
-	ushort filtermode : 1;  /* Set to enter filter mode */
+	uint filtermode : 1;  /* Set to enter filter mode */
-	ushort mtimeorder : 1;  /* Set to sort by time modified */
+	uint mtimeorder : 1;  /* Set to sort by time modified */
-	ushort sizeorder  : 1;  /* Set to sort by file size */
+	uint sizeorder  : 1;  /* Set to sort by file size */
-	ushort apparentsz : 1;  /* Set to sort by apparent size (disk usage) */
+	uint apparentsz : 1;  /* Set to sort by apparent size (disk usage) */
-	ushort blkorder   : 1;  /* Set to sort by blocks used (disk usage) */
+	uint blkorder   : 1;  /* Set to sort by blocks used (disk usage) */
-	ushort showhidden : 1;  /* Set to show hidden files */
+	uint showhidden : 1;  /* Set to show hidden files */
-	ushort copymode   : 1;  /* Set when copying files */
+	uint copymode   : 1;  /* Set when copying files */
-	ushort autoselect : 1;  /* Auto-select dir in nav-as-you-type mode */
+	uint autoselect : 1;  /* Auto-select dir in nav-as-you-type mode */
-	ushort showdetail : 1;  /* Clear to show fewer file info */
+	uint showdetail : 1;  /* Clear to show fewer file info */
-	ushort showcolor  : 1;  /* Set to show dirs in blue */
+	uint showcolor  : 1;  /* Set to show dirs in blue */
-	ushort dircolor   : 1;  /* Current status of dir color */
+	uint dircolor   : 1;  /* Current status of dir color */
-	ushort metaviewer : 1;  /* Index of metadata viewer in utils[] */
+	uint metaviewer : 1;  /* Index of metadata viewer in utils[] */
-	ushort quote      : 1;  /* Copy paths within quotes */
+	uint quote      : 1;  /* Copy paths within quotes */
-	ushort color      : 3;  /* Color code for directories */
+	uint color      : 3;  /* Color code for directories */
+	uint ctxactive  : 1;  /* Context active or not */
+	uint reserved   : 15;
 } settings;
 
+/* Contexts or workspaces */
+typedef struct {
+	char c_name[NAME_MAX + 1];
+	char c_fltr[NAME_MAX + 1];
+	char c_path[PATH_MAX];
+	char c_init[PATH_MAX];
+	char c_last[PATH_MAX];
+	settings c_cfg;
+} context;
+
 /* GLOBALS */
 
-/* Configuration */
+/* Configuration, contexts */
-static settings cfg = {0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 4};
+static settings cfg = {0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 0, 0, 4, 1, 0};
+static context g_ctx[MAX_CTX] __attribute__ ((aligned));
+static uchar g_curctx;
 
 static struct entry *dents;
 static char *pnamebuf, *pcopybuf;
@@ -2313,8 +2328,8 @@ static void redraw(char *path)
 			DPRINTF_S("copymode off");
 		}
 
-	/* Fail redraw if < than 10 columns */
+	/* Fail redraw if < than 11 columns, context info prints 10 chars */
-	if (COLS < 10) {
+	if (COLS < 11) {
 		printmsg("too few columns!");
 		return;
 	}
@@ -2338,9 +2353,27 @@ static void redraw(char *path)
 	if (ncols > PATH_MAX)
 		ncols = PATH_MAX;
 
+	printw("[");
+	for (i = 0; i < MAX_CTX; ++i) {
+		/* Print current context in reverse */
+		if (g_curctx == i) {
+			attron(A_REVERSE);
+			printw("%d", i + 1);
+			attroff(A_REVERSE);
+			printw(" ");
+		} else if (g_ctx[i].c_cfg.ctxactive) {
+			attron(A_UNDERLINE);
+			printw("%d", i + 1);
+			attroff(A_UNDERLINE);
+			printw(" ");
+		} else
+			printw("%d ", i + 1);
+	}
+	printw("\b] "); /* 10 chars printed in total for contexts - "[1 2 3 4] " */
+
 	attron(A_UNDERLINE);
 	/* No text wrapping in cwd line */
-	g_buf[ncols - 1] = '\0';
+	g_buf[ncols - 11] = '\0';
 	printw("%s\n\n", g_buf);
 	attroff(A_UNDERLINE);
 
@@ -2437,6 +2470,10 @@ static void browse(char *ipath, char *ifilter)
 	enum action sel = SEL_RUNARG + 1;
 	bool dir_changed = FALSE;
 
+	/* setup first context */
+	g_curctx = 0;
+	xstrlcpy(g_ctx[0].c_init, ipath, PATH_MAX);
+
 	xstrlcpy(path, ipath, PATH_MAX);
 	copyfilter();
 	oldname[0] = newpath[0] = lastdir[0] = mark[0] = '\0';
@@ -2695,9 +2732,55 @@ nochange:
 				break;
 
 			/* Interpret ~, - and & keys */
-			if ((tmp[1] == '\0') && (tmp[0] == '~' || tmp[0] == '-' || tmp[0] == '&')) {
+			if (tmp[1] == '\0') {
+				switch (tmp[0]) {
+				case '~': //fallthrough
+				case '-': //fallthrough
+				case '&':
 					presel = tmp[0];
 					goto begin;
+				case '1': //fallthrough
+				case '2': //fallthrough
+				case '3': //fallthrough
+				case '4':
+				{
+					uint nextctx = tmp[0] - '1';
+					if (g_curctx == nextctx)
+						continue;
+
+					g_crc = 0;
+
+					/* Save current context */
+					xstrlcpy(g_ctx[g_curctx].c_name, oldname, NAME_MAX + 1);
+					xstrlcpy(g_ctx[g_curctx].c_fltr, fltr, NAME_MAX + 1);
+					xstrlcpy(g_ctx[g_curctx].c_path, path, PATH_MAX);
+					xstrlcpy(g_ctx[g_curctx].c_last, lastdir, PATH_MAX);
+					g_ctx[g_curctx].c_cfg = cfg;
+
+					if (!g_ctx[nextctx].c_cfg.ctxactive) {
+						/* Setup a new context  from current context */
+						g_ctx[nextctx].c_cfg.ctxactive = 1;
+						xstrlcpy(g_ctx[nextctx].c_name, oldname, NAME_MAX + 1);
+						xstrlcpy(g_ctx[nextctx].c_fltr, fltr, NAME_MAX + 1);
+						xstrlcpy(g_ctx[nextctx].c_path, path, PATH_MAX);
+						xstrlcpy(g_ctx[nextctx].c_init, path, PATH_MAX);
+						ipath = g_ctx[nextctx].c_init;
+						g_ctx[nextctx].c_last[0] = lastdir[0] = '\0';
+						g_ctx[nextctx].c_cfg = cfg;
+					} else {
+						/* Switch to saved context */
+						xstrlcpy(oldname, g_ctx[nextctx].c_name, NAME_MAX + 1);
+						xstrlcpy(fltr, g_ctx[nextctx].c_fltr, NAME_MAX + 1);
+						xstrlcpy(path, g_ctx[nextctx].c_path, PATH_MAX);
+						ipath = g_ctx[nextctx].c_init;
+						xstrlcpy(lastdir, g_ctx[nextctx].c_last, PATH_MAX);
+						cfg = g_ctx[nextctx].c_cfg;
+					}
+
+					g_curctx = nextctx;
+					goto begin;
+				}
+				}
 			}
 
 			if (get_bm_loc(tmp, newpath) == NULL) {