\v and \f are have the same behaviour of \n.

[st.git] / st.c

diff --git a/st.c b/st.c
index 0c6423a..147a6fa 100644 (file)
--- a/st.c
+++ b/st.c
@@ -55,9 +55,11 @@ 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 };
 
 typedef struct {
        char c;     /* character code  */
@@ -117,8 +119,7 @@ typedef struct {
        int bufh; /* pixmap height */
        int ch; /* char height */
        int cw; /* char width  */
-       int focus;
-       int vis; /* is visible */
+       char state; /* focus, redraw, visible */
 } XWindow; 
 
 typedef struct {
@@ -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 */
@@ -1162,11 +1168,14 @@ tputc(char c) {
                case '\r':
                        tmoveto(0, term.c.y);
                        break;
+               case '\f':
+               case '\v':
                case '\n':
-                       tnewline();
+                       /* go to first col if the mode is set */
+                       tnewline(IS_SET(MODE_CRLF));
                        break;
                case '\a':
-                       if(!xw.focus)
+                       if(!(xw.state & WIN_FOCUSED))
                                xseturgency(1);
                        break;
                case '\033':
@@ -1175,7 +1184,7 @@ 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);
@@ -1418,7 +1427,7 @@ xdrawcursor(void) {
                xclear(oldx, oldy, oldx, oldy);
        
        /* draw the new one */
-       if(!(term.c.state & CURSOR_HIDE) && xw.focus) {
+       if(!(term.c.state & CURSOR_HIDE) && (xw.state & WIN_FOCUSED)) {
                xdraws(&g.c, g, term.c.x, term.c.y, 1);
                oldx = term.c.x, oldy = term.c.y;
        }
@@ -1458,7 +1467,7 @@ draw(int redraw_all) {
        Glyph base, new;
        char buf[DRAW_BUF_SIZ];
 
-       if(!xw.vis)
+       if(!(xw.state & WIN_VISIBLE))
                return;
 
        xclear(0, 0, term.col-1, term.row-1);
@@ -1487,27 +1496,36 @@ draw(int redraw_all) {
        }
        xdrawcursor();
        XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
-       XFlush(xw.dis);
 }
 
 #endif
 
 void
 expose(XEvent *ev) {
-       draw(SCREEN_REDRAW);
+       XExposeEvent *e = &ev->xexpose;
+       if(xw.state & WIN_REDRAW) {
+               if(!e->count) {
+                       xw.state &= ~WIN_REDRAW;
+                       draw(SCREEN_REDRAW);
+               }
+       } else
+               XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, e->x-BORDER, e->y-BORDER,
+                               e->width, e->height, e->x, e->y);
 }
 
 void
 visibility(XEvent *ev) {
        XVisibilityEvent *e = &ev->xvisibility;
-       /* XXX if this goes from 0 to 1, need a full redraw for next Expose,
-        * not just a buf copy */
-       xw.vis = e->state != VisibilityFullyObscured;
+       if(e->state == VisibilityFullyObscured)
+               xw.state &= ~WIN_VISIBLE;
+       else if(!(xw.state & WIN_VISIBLE))
+               /* need a full redraw for next Expose, not just a buf copy */
+               xw.state |= WIN_VISIBLE | WIN_REDRAW;
 }
 
 void
 unmap(XEvent *ev) {
-       xw.vis = 0;
+       xw.state &= ~WIN_VISIBLE;
 }
 
 void
@@ -1520,8 +1538,11 @@ xseturgency(int add) {
 
 void
 focus(XEvent *ev) {
-       if((xw.focus = ev->type == FocusIn))
+       if(ev->type == FocusIn) {
+               xw.state |= WIN_FOCUSED;
                xseturgency(0);
+       } else
+               xw.state &= ~WIN_FOCUSED;
        draw(SCREEN_UPDATE);
 }
 
@@ -1548,15 +1569,12 @@ 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:
@@ -1569,8 +1587,21 @@ 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;
                }
 }