Add Ctrl-u and Ctrl-w readline bindings.

Ctrl-u is just a whole line delete for now, as there's no sense of a
cursor position in tofi (so the whole line is "left" of the cursor).

Author: philj56

doc/tofi.1.md

@@ -19,7 +19,7 @@ displays a graphical selection menu. When a selection is made, it is
 printed to stdout.
 
 When invoked via the name **tofi-run**, **tofi** will not accept items
-on stdin, instead presenting a list of executables in the user's $PATH.
+on stdin, instead presenting a list of executables in the user's \$PATH.
 
 When invoked via the name **tofi-drun**, **tofi** will not accept items
 on stdin, and will generate a list of applications from desktop files as
@@ -55,6 +55,14 @@ the form **--key=value**.
 
 > Move the selection forward one entry.
 
+\<Ctrl\>-u
+
+> Delete line.
+
+\<Ctrl\>-w
+
+> Delete word.
+
 \<Enter\>
 
 > Confirm the current selection and quit.
@@ -69,24 +77,24 @@ the form **--key=value**.
 
 > Example configuration file.
 
-*$XDG_CONFIG_HOME/tofi/config*
+*\$XDG_CONFIG_HOME/tofi/config*
 
 > The default configuration file location.
 
-*$XDG_CACHE_HOME/tofi-compgen*
+*\$XDG_CACHE_HOME/tofi-compgen*
 
-> Cached list of executables under $PATH, regenerated as necessary.
+> Cached list of executables under \$PATH, regenerated as necessary.
 
-*$XDG_CACHE_HOME/tofi-drun*
+*\$XDG_CACHE_HOME/tofi-drun*
 
 > Cached list of desktop applications, regenerated as necessary.
 
-*$XDG_STATE_HOME/tofi-history*
+*\$XDG_STATE_HOME/tofi-history*
 
 > Numeric count of commands selected in **tofi-run**, to enable sorting
 > results by run count.
 
-*$XDG_STATE_HOME/tofi-drun-history*
+*\$XDG_STATE_HOME/tofi-drun-history*
 
 > Numeric count of commands selected in **tofi-drun**, to enable sorting
 > results by run count.

doc/tofi.1.scd

@@ -50,6 +50,12 @@ All config file options described in *tofi*(5) are also accepted, in the form
 <Down> | <Right> | <Ctrl>-j | <Tab>
 	Move the selection forward one entry.
 
+<Ctrl>-u
+	Delete line.
+
+<Ctrl>-w
+	Delete word.
+
 <Enter>
 	Confirm the current selection and quit.
 

src/main.c

@@ -177,9 +177,26 @@ static void handle_keypress(struct tofi *tofi, xkb_keycode_t keycode)
 				string_vec_destroy(&tmp);
 			}
 		}
-	} else if (entry->input_length > 0 && sym == XKB_KEY_BackSpace) {
-		entry->input_length--;
-		entry->input[entry->input_length] = L'\0';
+	} else if (entry->input_length > 0
+			&& (sym == XKB_KEY_BackSpace
+				|| (sym == XKB_KEY_w
+					&& xkb_state_mod_name_is_active(
+						tofi->xkb_state,
+						XKB_MOD_NAME_CTRL,
+						XKB_STATE_MODS_EFFECTIVE))))
+	{
+		if (sym == XKB_KEY_BackSpace) {
+			entry->input_length--;
+			entry->input[entry->input_length] = L'\0';
+		} else {
+			while (entry->input_length > 0 && iswspace(entry->input[entry->input_length - 1])) {
+				entry->input_length--;
+			}
+			while (entry->input_length > 0 && !iswspace(entry->input[entry->input_length - 1])) {
+				entry->input_length--;
+			}
+			entry->input[entry->input_length] = L'\0';
+		}
 		const wchar_t *src = entry->input;
 		size_t siz = wcsrtombs(
 				entry->input_mb,
@@ -193,6 +210,23 @@ static void handle_keypress(struct tofi *tofi, xkb_keycode_t keycode)
 		} else {
 			entry->results = string_vec_filter(&entry->commands, entry->input_mb, tofi->fuzzy_match);
 		}
+	} else if (sym == XKB_KEY_u
+			&& xkb_state_mod_name_is_active(
+				tofi->xkb_state,
+				XKB_MOD_NAME_CTRL,
+				XKB_STATE_MODS_EFFECTIVE)
+		  )
+	{
+		entry->input_length = 0;
+		entry->input[0] = L'\0';
+		entry->input_mb_length = 0;
+		entry->input_mb[0] = '\0';
+		string_vec_destroy(&entry->results);
+		if (entry->drun) {
+			entry->results = desktop_vec_filter(&entry->apps, entry->input_mb, tofi->fuzzy_match);
+		} else {
+			entry->results = string_vec_filter(&entry->commands, entry->input_mb, tofi->fuzzy_match);
+		}
 	} else if (sym == XKB_KEY_Escape
 			|| (sym == XKB_KEY_c
 				&& xkb_state_mod_name_is_active(