Adding columns patch ref. #34

README.md

@@ -15,6 +15,8 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
 
 ### Changelog:
 
+2021-07-26 - Added columns patch
+
 2021-07-07 - Added sixel scrollback and the openurlonclick patch
 
 2021-06-09 - Added the hide terminal cursor patch
@@ -102,6 +104,10 @@ Refer to [https://st.suckless.org/](https://st.suckless.org/) for details on the
       - by default st only sets PRIMARY on selection
       - this patch makes st set CLIPBOARD on selection
 
+   - [columns](https://github.com/bakkeby/st-flexipatch/issues/34)
+      - allows st to be resized without cutting off text when the terminal window is made larger again
+      - text does not wrap when the terminal window is made smaller
+
    - [copyurl](https://st.suckless.org/patches/copyurl/)
       - this patch allows you to select and copy the last URL displayed with Mod+l
       - multiple invocations cycle through the available URLs

patches.def.h

@@ -68,6 +68,15 @@
  */
 #define CLIPBOARD_PATCH 0
 
+/* This patch allows st to be resized without cutting off text when the terminal window is
+ * made larger again. Text does not wrap when the terminal window is made smaller.
+ *
+ * The vim browse patch takes precedence over this patch.
+ *
+ * https://github.com/bakkeby/st-flexipatch/issues/34
+ */
+#define COLUMNS_PATCH 0
+
 /* Select and copy the last URL displayed with Mod+l. Multiple invocations cycle through the
  * available URLs.
  * https://st.suckless.org/patches/copyurl/

st.c

@@ -1654,6 +1654,9 @@ tclearregion(int x1, int y1, int x2, int y2)
 	#if VIM_BROWSE_PATCH
 	LIMIT(x1, 0, buffCols-1);
 	LIMIT(x2, 0, buffCols-1);
+	#elif COLUMNS_PATCH
+	LIMIT(x1, 0, term.maxcol-1);
+	LIMIT(x2, 0, term.maxcol-1);
 	#else
 	LIMIT(x1, 0, term.col-1);
 	LIMIT(x2, 0, term.col-1);
@@ -3165,6 +3168,15 @@ tresize(int col, int row)
 	col = MAX(col, buffCols);
 	row = MIN(row, buffSize);
 	int const minrow = MIN(row, term.row), mincol = MIN(col, buffCols);
+	#elif COLUMNS_PATCH
+	int tmp = col;
+	int minrow, mincol;
+
+	if (!term.maxcol)
+		term.maxcol = term.col;
+	col = MAX(col, term.maxcol);
+	minrow = MIN(row, term.row);
+	mincol = MIN(col, term.maxcol);
 	#else
 	int minrow = MIN(row, term.row);
 	int mincol = MIN(col, term.col);
@@ -3251,6 +3263,8 @@ tresize(int col, int row)
 	}
 	#if VIM_BROWSE_PATCH
 	if (col > buffCols)
+	#elif COLUMNS_PATCH
+	if (col > term.maxcol)
 	#else
 	if (col > term.col)
 	#endif // VIM_BROWSE_PATCH
@@ -3258,6 +3272,9 @@ tresize(int col, int row)
 		#if VIM_BROWSE_PATCH
 		bp = term.tabs + buffCols;
 		memset(bp, 0, sizeof(*term.tabs) * (col - buffCols));
+		#elif COLUMNS_PATCH
+		bp = term.tabs + term.maxcol;
+		memset(bp, 0, sizeof(*term.tabs) * (col - term.maxcol));
 		#else
 		bp = term.tabs + term.col;
 		memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
@@ -3282,6 +3299,9 @@ tresize(int col, int row)
 	#if VIM_BROWSE_PATCH
 	term.col = colSet;
 	buffCols = col;
+	#elif COLUMNS_PATCH
+	term.col = tmp;
+	term.maxcol = col;
 	#else
 	term.col = col;
 	#endif // VIM_BROWSE_PATCH

st.h

@@ -140,6 +140,9 @@ typedef struct {
 typedef struct {
 	int row;      /* nb row */
 	int col;      /* nb col */
+	#if COLUMNS_PATCH && !VIM_BROWSE_PATCH
+	int maxcol;
+	#endif // COLUMNS_PATCH
 	Line *line;   /* screen */
 	Line *alt;    /* alternate screen */
 	#if SCROLLBACK_PATCH