added LNM mode; re-organized kpress() to handle it.

1 files changed, 34 insertions, 17 deletions

diff --git a/st.c b/st.c
index 4f17752..16462c7 100644
--- a/st.c
+++ b/st.c
@@ -55,7 +55,8 @@ enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT,
        CURSOR_SAVE, CURSOR_LOAD };
 enum { CURSOR_DEFAULT = 0, CURSOR_HIDE = 1, CURSOR_WRAPNEXT = 2 };
 enum { GLYPH_SET=1, GLYPH_DIRTY=2 };
-enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8 };
+enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4, MODE_ALTSCREEN=8, 
+       MODE_CRLF=16 };
 enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 };
 enum { SCREEN_UPDATE, SCREEN_REDRAW };
 enum { WIN_VISIBLE=1, WIN_REDRAW=2, WIN_FOCUSED=4 };
@@ -164,7 +165,7 @@ static void tinsertblank(int);
 static void tinsertblankline(int);
 static void tmoveto(int, int);
 static void tnew(int, int);
-static void tnewline(void);
+static void tnewline(int);
 static void tputtab(void);
 static void tputc(char);
 static void tputs(char*, int);
@@ -626,14 +627,13 @@ tscrollup(int orig, int n) {
 }
 
 void
-tnewline(void) {
-        int x = term.c.x+1 < term.col ? term.c.x : 0;
+tnewline(int first_col) {
         int y = term.c.y;
-        if(term.c.y == term.bot)
+        if(y == term.bot)
                 tscrollup(term.top, 1);
         else
                 y++;
-        tmoveto(x, y);
+        tmoveto(first_col ? 0 : term.c.x, y);
 }
 
 void
@@ -932,6 +932,9 @@ csihandle(void) {
                                 break;
                         case 12: /* att610 -- Stop blinking cursor (IGNORED) */
                                 break;
+                        case 20:
+                                term.mode &= ~MODE_CRLF;
+                                break;
                         case 25:
                                 term.c.state |= CURSOR_HIDE;
                                 break;
@@ -988,6 +991,9 @@ csihandle(void) {
                         case 7:
                                 term.mode |= MODE_WRAP;
                                 break;
+                        case 20:
+                                term.mode |= MODE_CRLF;
+                                break;
                         case 12: /* att610 -- Start blinking cursor (IGNORED) */
                                  /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
                                 if(escseq.narg > 1 && escseq.arg[1] != 25)
@@ -1116,7 +1122,7 @@ tputc(char c) {
                                 term.esc = 0;
                                 break;
                         case 'E': /* NEL -- Next line */
-                                tnewline();
+                                tnewline(1); /* always go to first col */
                                 term.esc = 0;
                                 break;
                         case 'M': /* RI -- Reverse index */
@@ -1163,7 +1169,8 @@ tputc(char c) {
                         tmoveto(0, term.c.y);
                         break;
                 case '\n':
-                        tnewline();
+                        /* go to first col if the mode is set */
+                        tnewline(IS_SET(MODE_CRLF));
                         break;
                 case '\a':
                         if(!(xw.state & WIN_FOCUSED))
@@ -1175,7 +1182,7 @@ tputc(char c) {
                         break;
                 default:
                         if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
-                                tnewline();
+                                tnewline(1); /* always go to first col */
                         tsetchar(c);
                         if(term.c.x+1 < term.col)
                                 tmoveto(term.c.x+1, term.c.y);
@@ -1560,15 +1567,12 @@ kpress(XEvent *ev) {
         meta = e->state & Mod1Mask;
         shift = e->state & ShiftMask;
         len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
-
+        
+        /* 1. custom keys from config.h */
         if((customkey = kmap(ksym)))
                 ttywrite(customkey, strlen(customkey));
-        else if(len > 0) {
-                buf[sizeof(buf)-1] = '\0';
-                if(meta && len == 1)
-                        ttywrite("\033", 1);
-                ttywrite(buf, len);
-        } else
+        /* 2. hardcoded (overrides X lookup) */
+        else
                 switch(ksym) {
                 case XK_Up:
                 case XK_Down:
@@ -1581,8 +1585,21 @@ kpress(XEvent *ev) {
                         if(shift)
                                 selpaste();
                         break;
+                case XK_Return:
+                        if(IS_SET(MODE_CRLF))
+                                ttywrite("\r\n", 2);
+                        else
+                                ttywrite("\r", 1);
+                        break;
+                        /* 3. X lookup  */
                 default:
-                        fprintf(stderr, "errkey: %d\n", (int)ksym);
+                        if(len > 0) {
+                                buf[sizeof(buf)-1] = '\0';
+                                if(meta && len == 1)
+                                        ttywrite("\033", 1);
+                                ttywrite(buf, len);
+                        } else /* 4. nothing to send */
+                                fprintf(stderr, "errkey: %d\n", (int)ksym);
                         break;
                 }
 }