Add SUB and CAN control codes

[st.git] / st.c

diff --git a/st.c b/st.c
index f6c9f18..8e25d23 100644 (file)
--- a/st.c
+++ b/st.c
@@ -224,7 +224,9 @@ typedef struct {
        int mode;
        int bx, by;
        int ex, ey;
-       struct {int x, y;} b, e;
+       struct {
+               int x, y;
+       } b, e;
        char *clip;
        Atom xtarget;
        bool alt;
@@ -300,7 +302,6 @@ static void ttywrite(const char *, size_t);
 static void xdraws(char *, Glyph, int, int, int, int);
 static void xhints(void);
 static void xclear(int, int, int, int);
-static void xclearborders(void);
 static void xdrawcursor(void);
 static void xinit(void);
 static void xloadcols(void);
@@ -587,10 +588,10 @@ selected(int x, int y) {
                return BETWEEN(x, bx, ex);
        }
 
-       return ((sel.b.y < y&&y < sel.e.y)
-                       || (y==sel.e.y && x<=sel.e.x))
-                       || (y==sel.b.y && x>=sel.b.x
-                                       && (x<=sel.e.x || sel.b.y!=sel.e.y));
+       return ((sel.b.y < y && y < sel.e.y)
+                       || (y == sel.e.y && x <= sel.e.x))
+                       || (y == sel.b.y && x >= sel.b.x
+                               && (x <= sel.e.x || sel.b.y != sel.e.y));
 }
 
 void
@@ -803,12 +804,12 @@ brelease(XEvent *e) {
                                /* double click to select word */
                                sel.bx = sel.ex;
                                while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
-                                         term.line[sel.ey][sel.bx-1].c[0] != ' ') {
+                                               term.line[sel.ey][sel.bx-1].c[0] != ' ') {
                                        sel.bx--;
                                }
                                sel.b.x = sel.bx;
                                while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
-                                         term.line[sel.ey][sel.ex+1].c[0] != ' ') {
+                                               term.line[sel.ey][sel.ex+1].c[0] != ' ') {
                                        sel.ex++;
                                }
                                sel.e.x = sel.ex;
@@ -1031,7 +1032,8 @@ treset(void) {
        memset(term.tabs, 0, term.col * sizeof(*term.tabs));
        for(i = TAB; i < term.col; i += TAB)
                term.tabs[i] = 1;
-       term.top = 0, term.bot = term.row - 1;
+       term.top = 0;
+       term.bot = term.row - 1;
        term.mode = MODE_WRAP;
 
        tclearregion(0, 0, term.col-1, term.row-1);
@@ -1040,7 +1042,8 @@ treset(void) {
 void
 tnew(int col, int row) {
        /* set screen size */
-       term.row = row, term.col = col;
+       term.row = row;
+       term.col = col;
        term.line = xmalloc(term.row * sizeof(Line));
        term.alt  = xmalloc(term.row * sizeof(Line));
        term.dirty = xmalloc(term.row * sizeof(*term.dirty));
@@ -1437,8 +1440,8 @@ tsetmode(bool priv, bool set, int *args, int narg) {
                                if(IS_SET(MODE_ALTSCREEN))
                                        tclearregion(0, 0, term.col-1, term.row-1);
                                if((set && !IS_SET(MODE_ALTSCREEN)) ||
-                                   (!set && IS_SET(MODE_ALTSCREEN))) {
-                                           tswapscreen();
+                                               (!set && IS_SET(MODE_ALTSCREEN))) {
+                                       tswapscreen();
                                }
                                if(*args != 1049)
                                        break;
@@ -1786,32 +1789,45 @@ tputc(char *c, int len) {
                write(iofd, c, len);
 
        switch(ascii) {
-       case '\t':
+       case '\t':      /* HT */
                tputtab(1);
                return;
-       case '\b':
+       case '\b':      /* BS */
                tmoveto(term.c.x-1, term.c.y);
                return;
-       case '\r':
+       case '\r':      /* CR */
                tmoveto(0, term.c.y);
                return;
-       case '\f':
-       case '\v':
-       case '\n':
+       case '\f':      /* LF */
+       case '\v':      /* VT */
+       case '\n':      /* LF */
                /* go to first col if the mode is set */
                tnewline(IS_SET(MODE_CRLF));
                return;
-       case '\a':
+       case '\a':      /* BEL */
                if(term.esc & ESC_STR)
                        break;
-
                if(!(xw.state & WIN_FOCUSED))
                        xseturgency(1);
                return;
-       case '\033':
+       case '\033':    /* ESC */
                csireset();
                term.esc = ESC_START;
                return;
+       case '\016':    /* XXX: SO */
+       case '\017':    /* XXX: SI */
+               break;
+       case '\032':    /* SUB */
+       case '\030':    /* CAN */
+               csireset();
+               return;
+       default:
+       /* case '\005': ENQ (IGNORED) */
+       /* case '\000': NUL (IGNORED) */
+       /* case '\021': XON (IGNORED) */
+       /* case '\023': XOFF (IGNORED) */
+       /* case 0177:   DEL (IGNORED) */
+               break;
        }
 
        if(term.esc & ESC_START) {
@@ -1909,7 +1925,6 @@ tputc(char *c, int len) {
                        case 'c': /* RIS -- Reset to inital state */
                                treset();
                                term.esc = 0;
-                               xclearborders();
                                xresettitle();
                                break;
                        case '=': /* DECPAM -- Application keypad */
@@ -2091,18 +2106,6 @@ xclear(int x1, int y1, int x2, int y2) {
 }
 
 void
-xclearborders(void) {
-       /* top and left border */
-       xclear(0, 0, BORDER, xw.h);
-       xclear(0, 0, xw.w, BORDER);
-
-       /* lower and right border */
-       xclear(BORDER, xw.th - 1, xw.w, xw.h);
-       /* Will just draw what hasn't been drawn by the previous call. */
-       xclear(xw.tw - 1, BORDER, xw.w, xw.h - xw.th - 2);
-}
-
-void
 xhints(void) {
        XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
        XWMHints wm = {.flags = InputHint, .input = 1};
@@ -2264,8 +2267,8 @@ xinit(void) {
 
 void
 xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
-       int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch,
-           width = charlen*xw.cw;
+       int winx = BORDER + x * xw.cw, winy = BORDER + y * xw.ch,
+           width = charlen * xw.cw;
        Font *font = &dc.font;
        XGlyphInfo extents;
        XftColor *fg = &dc.xft_col[base.fg], *bg = &dc.xft_col[base.bg],
@@ -2328,6 +2331,20 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
                        &extents);
        width = extents.xOff;
 
+       /* Intelligent cleaning up of the borders. */
+       if(x == 0) {
+               xclear(0, (y == 0)? 0 : winy, BORDER,
+                       winy + xw.ch + (y == term.row-1)? xw.h : 0);
+       }
+       if(x + charlen >= term.col-1) {
+               xclear(winx + width, (y == 0)? 0 : winy, xw.w,
+                       winy + xw.ch + (y == term.row-1)? xw.h : 0);
+       }
+       if(y == 0)
+               xclear(winx, 0, winx + width, BORDER);
+       if(y == term.row-1)
+               xclear(winx, winy + xw.ch, winx + width, xw.h);
+
        XftDrawRect(xw.xft_draw, bg, winx, winy, width, xw.ch);
        XftDrawStringUtf8(xw.xft_draw, fg, font->xft_set, winx,
                        winy + font->ascent, (FcChar8 *)s, bytelen);
@@ -2382,7 +2399,6 @@ void
 redraw(void) {
        struct timespec tv = {0, REDRAW_TIMEOUT * 1000};
 
-       xclearborders();
        tfulldirt();
        draw();
        XSync(xw.dpy, False); /* necessary for a good tput flash */
@@ -2598,7 +2614,6 @@ resize(XEvent *e) {
 
        tresize(col, row);
        xresize(col, row);
-       xclearborders();
        ttyresize();
 }