Adding gridnav patch

README.md

@@ -26,7 +26,7 @@ dmenu, how to install it and how it works.
 
 ### Changelog:
 
-2021-05-17 - Added the restrict return, no sort and plain-prompt (listfullwidth) patches
+2021-05-17 - Added the restrict return, no sort, gridnav and plain-prompt (listfullwidth) patches
 
 2021-05-15 - Added the tsv and printindex patches
 
@@ -92,6 +92,9 @@ dmenu, how to install it and how it works.
         number of grid columns
       - the `-g` and `-l` options can be used together to create a G columns * L lines grid
 
+   - [gridnav](https://tools.suckless.org/dmenu/patches/gridnav/)
+      - adds the ability to move left and right through a grid (when using the grid patch)
+
    - [highlight](https://tools.suckless.org/dmenu/patches/highlight/)
       - this patch highlights the individual characters of matched text for each dmenu list entry
 

dmenu.c

@@ -32,6 +32,9 @@
 
 #include "drw.h"
 #include "util.h"
+#if GRIDNAV_PATCH
+#include <stdbool.h>
+#endif // GRIDNAV_PATCH
 #if JSON_PATCH
 #include <jansson.h>
 #endif // JSON_PATCH
@@ -775,6 +778,11 @@ keypress(XKeyEvent *ev)
 	#endif // PREFIXCOMPLETION_PATCH
 	KeySym ksym;
 	Status status;
+	#if GRID_PATCH && GRIDNAV_PATCH
+	int i;
+	struct item *tmpsel;
+	bool offscreen = false;
+	#endif // GRIDNAV_PATCH
 
 	len = XmbLookupString(xic, ev, buf, sizeof buf, &ksym, &status);
 	switch (status) {
@@ -908,6 +916,26 @@ insert:
 		calcoffsets();
 		break;
 	case XK_Left:
+		#if GRID_PATCH && GRIDNAV_PATCH
+		if (columns > 1) {
+			if (!sel)
+				return;
+			tmpsel = sel;
+			for (i = 0; i < lines; i++) {
+				if (!tmpsel->left ||  tmpsel->left->right != tmpsel)
+					return;
+				if (tmpsel == curr)
+					offscreen = true;
+				tmpsel = tmpsel->left;
+			}
+			sel = tmpsel;
+			if (offscreen) {
+				curr = prev;
+				calcoffsets();
+			}
+			break;
+		}
+		#endif // GRIDNAV_PATCH
 		if (cursor > 0 && (!sel || !sel->left || lines > 0)) {
 			cursor = nextrune(-1);
 			break;
@@ -1005,6 +1033,26 @@ insert:
 		#endif // MULTI_SELECTION_PATCH
 		break;
 	case XK_Right:
+		#if GRID_PATCH && GRIDNAV_PATCH
+		if (columns > 1) {
+			if (!sel)
+				return;
+			tmpsel = sel;
+			for (i = 0; i < lines; i++) {
+				if (!tmpsel->right ||  tmpsel->right->left != tmpsel)
+					return;
+				tmpsel = tmpsel->right;
+				if (tmpsel == next)
+					offscreen = true;
+			}
+			sel = tmpsel;
+			if (offscreen) {
+				curr = next;
+				calcoffsets();
+			}
+			break;
+		}
+		#endif // GRIDNAV_PATCH
 		if (text[cursor] != '\0') {
 			cursor = nextrune(+1);
 			break;

patches.def.h

@@ -57,6 +57,12 @@
  */
 #define GRID_PATCH 0
 
+/* This patch adds the ability to move left and right through a grid.
+ * This patch depends on the grid patch.
+ * https://tools.suckless.org/dmenu/patches/gridnav/
+ */
+#define GRIDNAV_PATCH 0
+
 /* This patch highlights the individual characters of matched text for each dmenu list entry.
  * The fuzzy highlight patch takes precedence over this patch.
  * https://tools.suckless.org/dmenu/patches/highlight/