vis: split `:set show <option>` into separate options

It was the only command option which needed `=` to assign a value to.
This unifies the argument parsing logic and adds the possibility to
specify a per-option help text.

You might want to adapt your visrc.lua configuration accordingly.

3 files changed, 34 insertions, 36 deletions

diff --git a/README.md b/README.md
index 115917f..1eb5f66 100644
--- a/README.md
+++ b/README.md
@@ -429,14 +429,12 @@ Operators can be forced to work line wise by specifying `V`.
        use syntax definition given (e.g. "ansi_c") or disable syntax
        highlighting if no such definition exists (e.g :set syntax off)
 
-     show
+     show-spaces    (yes|no)    default no
+     show-tabs      (yes|no)    default no
+     show-newlines  (yes|no)    default no
 
        show/hide special white space replacement symbols
 
-       newlines = [0|1]         default 0
-       tabs     = [0|1]         default 0
-       spaces   = [0|1]         default 0
-
      cursorline (yes|no)        default no
 
        highlight the line on which the cursor currently resides
diff --git a/sam.c b/sam.c
index 883cfd9..5ebf71c 100644
--- a/sam.c
+++ b/sam.c
@@ -202,7 +202,9 @@ enum {
 	OPTION_TABWIDTH,
 	OPTION_THEME,
 	OPTION_SYNTAX,
-	OPTION_SHOW,
+	OPTION_SHOW_SPACES,
+	OPTION_SHOW_TABS,
+	OPTION_SHOW_NEWLINES,
 	OPTION_NUMBER,
 	OPTION_NUMBER_RELATIVE,
 	OPTION_CURSOR_LINE,
@@ -236,10 +238,20 @@ static const OptionDef options[] = {
 		OPTION_TYPE_STRING, OPTION_FLAG_WINDOW|OPTION_FLAG_OPTIONAL,
 		"Syntax highlighting lexer to use filename without extension",
 	},
-	[OPTION_SHOW] = {
-		{ "show" },
-		OPTION_TYPE_STRING, OPTION_FLAG_WINDOW,
-		"Show white space replacement symbols",
+	[OPTION_SHOW_SPACES] = {
+		{ "show-spaces" },
+		OPTION_TYPE_BOOL, OPTION_FLAG_WINDOW,
+		"Display replacement symbol instead of a space",
+	},
+	[OPTION_SHOW_TABS] = {
+		{ "show-tabs" },
+		OPTION_TYPE_BOOL, OPTION_FLAG_WINDOW,
+		"Display replacement symbol for tabs",
+	},
+	[OPTION_SHOW_NEWLINES] = {
+		{ "show-newlines" },
+		OPTION_TYPE_BOOL, OPTION_FLAG_WINDOW,
+		"Display replacement symbol for newlines",
 	},
 	[OPTION_NUMBER] = {
 		{ "numbers", "nu" },
diff --git a/vis-cmds.c b/vis-cmds.c
index ab4a4d2..16debea 100644
--- a/vis-cmds.c
+++ b/vis-cmds.c
@@ -148,7 +148,8 @@ static bool cmd_set(Vis *vis, Win *win, Command *cmd, const char *argv[], Cursor
 		break;
 	}
 
-	switch (opt - options) {
+	size_t opt_index = opt - options;
+	switch (opt_index) {
 	case OPTION_EXPANDTAB:
 		vis->expandtab = arg.b;
 		break;
@@ -175,36 +176,23 @@ static bool cmd_set(Vis *vis, Win *win, Command *cmd, const char *argv[], Cursor
 			return false;
 		}
 		break;
-	case OPTION_SHOW:
-		if (!argv[2]) {
-			vis_info_show(vis, "Expecting: spaces, tabs, newlines");
-			return false;
-		}
-		const char *keys[] = { "spaces", "tabs", "newlines" };
+	case OPTION_SHOW_SPACES:
+	case OPTION_SHOW_TABS:
+	case OPTION_SHOW_NEWLINES:
+	{
 		const int values[] = {
-			UI_OPTION_SYMBOL_SPACE,
-			UI_OPTION_SYMBOL_TAB|UI_OPTION_SYMBOL_TAB_FILL,
-			UI_OPTION_SYMBOL_EOL,
+			[OPTION_SHOW_SPACES] = UI_OPTION_SYMBOL_SPACE,
+			[OPTION_SHOW_TABS] = UI_OPTION_SYMBOL_TAB|UI_OPTION_SYMBOL_TAB_FILL,
+			[OPTION_SHOW_NEWLINES] = UI_OPTION_SYMBOL_EOL,
 		};
 		int flags = view_options_get(win->view);
-		for (const char **args = &argv[2]; *args; args++) {
-			for (int i = 0; i < LENGTH(keys); i++) {
-				if (strcmp(*args, keys[i]) == 0) {
-					flags |= values[i];
-				} else if (strstr(*args, keys[i]) == *args) {
-					bool show;
-					const char *v = *args + strlen(keys[i]);
-					if (*v == '=' && parse_bool(v+1, &show)) {
-						if (show)
-							flags |= values[i];
-						else
-							flags &= ~values[i];
-					}
-				}
-			}
-		}
+		if (arg.b)
+			flags |= values[opt_index];
+		else
+			flags &= ~values[opt_index];
 		view_options_set(win->view, flags);
 		break;
+	}
 	case OPTION_NUMBER: {
 		enum UiOption opt = view_options_get(win->view);
 		if (arg.b) {