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selection code cleanup.
[st.git] / st.c
diff --git a/st.c b/st.c
index 5d5ac30..895519d 100644 (file)
--- a/st.c
+++ b/st.c
@@ -17,6 +17,7 @@
 #include <sys/wait.h>
 #include <unistd.h>
 #include <X11/Xlib.h>
 #include <sys/wait.h>
 #include <unistd.h>
 #include <X11/Xlib.h>
+#include <X11/Xatom.h>
 #include <X11/keysym.h>
 #include <X11/Xutil.h>
 
 #include <X11/keysym.h>
 #include <X11/Xutil.h>
 
@@ -54,9 +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 };
        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 { 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  */
 
 typedef struct {
        char c;     /* character code  */
@@ -116,8 +119,7 @@ typedef struct {
        int bufh; /* pixmap height */
        int ch; /* char height */
        int cw; /* char width  */
        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 {
 } XWindow; 
 
 typedef struct {
@@ -163,12 +165,12 @@ static void tinsertblank(int);
 static void tinsertblankline(int);
 static void tmoveto(int, int);
 static void tnew(int, 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);
 static void treset(void);
 static void tputtab(void);
 static void tputc(char);
 static void tputs(char*, int);
 static void treset(void);
-static void tresize(int, int);
+static int tresize(int, int);
 static void tscrollup(int, int);
 static void tscrolldown(int, int);
 static void tsetattr(int*, int);
 static void tscrollup(int, int);
 static void tscrolldown(int, int);
 static void tsetattr(int*, int);
@@ -188,6 +190,7 @@ static void xdrawcursor(void);
 static void xinit(void);
 static void xloadcols(void);
 static void xseturgency(int);
 static void xinit(void);
 static void xloadcols(void);
 static void xseturgency(int);
+static void xresize(int, int);
 
 static void expose(XEvent *);
 static void visibility(XEvent *);
 
 static void expose(XEvent *);
 static void visibility(XEvent *);
@@ -199,7 +202,8 @@ static void focus(XEvent *);
 static void brelease(XEvent *);
 static void bpress(XEvent *);
 static void bmotion(XEvent *);
 static void brelease(XEvent *);
 static void bpress(XEvent *);
 static void bmotion(XEvent *);
-
+static void selection_notify(XEvent *);
+static void selection_request(XEvent *);
 
 static void (*handler[LASTEvent])(XEvent *) = {
        [KeyPress] = kpress,
 
 static void (*handler[LASTEvent])(XEvent *) = {
        [KeyPress] = kpress,
@@ -212,6 +216,8 @@ static void (*handler[LASTEvent])(XEvent *) = {
        [MotionNotify] = bmotion,
        [ButtonPress] = bpress,
        [ButtonRelease] = brelease,
        [MotionNotify] = bmotion,
        [ButtonPress] = bpress,
        [ButtonRelease] = brelease,
+       [SelectionNotify] = selection_notify,
+       [SelectionRequest] = selection_request,
 };
 
 /* Globals */
 };
 
 /* Globals */
@@ -278,15 +284,80 @@ static char *getseltext() {
        return str;
 }
 
        return str;
 }
 
-/* TODO: use X11 clipboard */
+static void selection_notify(XEvent *e) {
+       unsigned long nitems;
+       unsigned long ofs, rem;
+       int format;
+       unsigned char *data;
+       Atom type;
+
+       ofs = 0;
+       do {
+               if(XGetWindowProperty(xw.dis, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
+                                       False, AnyPropertyType, &type, &format,
+                                       &nitems, &rem, &data)) {
+                       fprintf(stderr, "Clipboard allocation failed\n");
+                       return;
+               }
+               ttywrite((const char *) data, nitems * format / 8);
+               XFree(data);
+               /* number of 32-bit chunks returned */
+               ofs += nitems * format / 32;
+       } while(rem > 0);
+}
+
+static void selpaste() {
+       XConvertSelection(xw.dis, XA_PRIMARY, XA_STRING, XA_PRIMARY, xw.win, CurrentTime);
+}
+
+static void selection_request(XEvent *e)
+{
+       XSelectionRequestEvent *xsre;
+       XSelectionEvent xev;
+       Atom xa_targets;
+
+       xsre = (XSelectionRequestEvent *) e;
+       xev.type = SelectionNotify;
+       xev.requestor = xsre->requestor;
+       xev.selection = xsre->selection;
+       xev.target = xsre->target;
+       xev.time = xsre->time;
+       /* reject */
+       xev.property = None;
+
+       xa_targets = XInternAtom(xw.dis, "TARGETS", 0);
+       if(xsre->target == xa_targets) {
+               /* respond with the supported type */
+               Atom string = XA_STRING;
+               XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+                               XA_ATOM, 32, PropModeReplace,
+                               (unsigned char *) &string, 1);
+               xev.property = xsre->property;
+       } else if(xsre->target == XA_STRING) {
+               XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+                               xsre->target, 8, PropModeReplace,
+                               (unsigned char *) sel.clip, strlen(sel.clip));
+               xev.property = xsre->property;
+       }
+
+       /* all done, send a notification to the listener */
+       if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
+               fprintf(stderr, "Error sending SelectionNotify event\n");
+}
+
 static void selcopy(char *str) {
 static void selcopy(char *str) {
+       /* register the selection for both the clipboard and the primary */
+       Atom clipboard;
+
        free(sel.clip);
        sel.clip = str;
        free(sel.clip);
        sel.clip = str;
-}
 
 
-static void selpaste() {
-       if(sel.clip)
-               ttywrite(sel.clip, strlen(sel.clip));
+       XSetSelectionOwner(xw.dis, XA_PRIMARY, xw.win, CurrentTime);
+
+       clipboard = XInternAtom(xw.dis, "CLIPBOARD", 0);
+       XSetSelectionOwner(xw.dis, clipboard, xw.win, CurrentTime);
+
+       XFlush(xw.dis);
 }
 
 /* TODO: doubleclick to select word */
 }
 
 /* TODO: doubleclick to select word */
@@ -508,13 +579,13 @@ tscrollup(int orig, int n) {
 }
 
 void
 }
 
 void
-tnewline(void) {
+tnewline(int first_col) {
        int y = term.c.y;
        int y = term.c.y;
-       if(term.c.y == term.bot)
+       if(y == term.bot)
                tscrollup(term.top, 1);
        else
                y++;
                tscrollup(term.top, 1);
        else
                y++;
-       tmoveto(0, y);
+       tmoveto(first_col ? 0 : term.c.x, y);
 }
 
 void
 }
 
 void
@@ -559,7 +630,7 @@ tsetchar(char c) {
 
 void
 tclearregion(int x1, int y1, int x2, int y2) {
 
 void
 tclearregion(int x1, int y1, int x2, int y2) {
-       int y, temp;
+       int x, y, temp;
 
        if(x1 > x2)
                temp = x1, x1 = x2, x2 = temp;
 
        if(x1 > x2)
                temp = x1, x1 = x2, x2 = temp;
@@ -572,7 +643,8 @@ tclearregion(int x1, int y1, int x2, int y2) {
        LIMIT(y2, 0, term.row-1);
 
        for(y = y1; y <= y2; y++)
        LIMIT(y2, 0, term.row-1);
 
        for(y = y1; y <= y2; y++)
-               memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1));
+               for(x = x1; x <= x2; x++)
+                       term.line[y][x].state = 0;
 }
 
 void
 }
 
 void
@@ -762,10 +834,14 @@ csihandle(void) {
        case 'J': /* ED -- Clear screen */
                switch(escseq.arg[0]) {
                case 0: /* below */
        case 'J': /* ED -- Clear screen */
                switch(escseq.arg[0]) {
                case 0: /* below */
-                       tclearregion(term.c.x, term.c.y, term.col-1, term.row-1);
+                       tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
+                       if(term.c.y < term.row-1)
+                               tclearregion(0, term.c.y+1, term.col-1, term.row-1);
                        break;
                case 1: /* above */
                        break;
                case 1: /* above */
-                       tclearregion(0, 0, term.c.x, term.c.y);
+                       if(term.c.y > 1)
+                               tclearregion(0, 0, term.col-1, term.c.y-1);
+                       tclearregion(0, term.c.y, term.c.x, term.c.y);
                        break;
                case 2: /* all */
                        tclearregion(0, 0, term.col-1, term.row-1);
                        break;
                case 2: /* all */
                        tclearregion(0, 0, term.col-1, term.row-1);
@@ -812,6 +888,9 @@ csihandle(void) {
                                break;
                        case 12: /* att610 -- Stop blinking cursor (IGNORED) */
                                break;
                                break;
                        case 12: /* att610 -- Stop blinking cursor (IGNORED) */
                                break;
+                       case 20:
+                               term.mode &= ~MODE_CRLF;
+                               break;
                        case 25:
                                term.c.state |= CURSOR_HIDE;
                                break;
                        case 25:
                                term.c.state |= CURSOR_HIDE;
                                break;
@@ -868,6 +947,9 @@ csihandle(void) {
                        case 7:
                                term.mode |= MODE_WRAP;
                                break;
                        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)
                        case 12: /* att610 -- Start blinking cursor (IGNORED) */
                                 /* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
                                if(escseq.narg > 1 && escseq.arg[1] != 25)
@@ -996,7 +1078,7 @@ tputc(char c) {
                                term.esc = 0;
                                break;
                        case 'E': /* NEL -- Next line */
                                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 */
                                term.esc = 0;
                                break;
                        case 'M': /* RI -- Reverse index */
@@ -1042,11 +1124,14 @@ tputc(char c) {
                case '\r':
                        tmoveto(0, term.c.y);
                        break;
                case '\r':
                        tmoveto(0, term.c.y);
                        break;
+               case '\f':
+               case '\v':
                case '\n':
                case '\n':
-                       tnewline();
+                       /* go to first col if the mode is set */
+                       tnewline(IS_SET(MODE_CRLF));
                        break;
                case '\a':
                        break;
                case '\a':
-                       if(!xw.focus)
+                       if(!(xw.state & WIN_FOCUSED))
                                xseturgency(1);
                        break;
                case '\033':
                                xseturgency(1);
                        break;
                case '\033':
@@ -1055,7 +1140,7 @@ tputc(char c) {
                        break;
                default:
                        if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
                        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);
                        tsetchar(c);
                        if(term.c.x+1 < term.col)
                                tmoveto(term.c.x+1, term.c.y);
@@ -1072,15 +1157,15 @@ tputs(char *s, int len) {
                tputc(*s++);
 }
 
                tputc(*s++);
 }
 
-void
+int
 tresize(int col, int row) {
 tresize(int col, int row) {
-       int i;
+       int i, x;
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);
        int slide = term.c.y - row + 1;
 
        if(col < 1 || row < 1)
        int minrow = MIN(row, term.row);
        int mincol = MIN(col, term.col);
        int slide = term.c.y - row + 1;
 
        if(col < 1 || row < 1)
-               return;
+               return 0;
 
        /* free unneeded rows */
        i = 0;
 
        /* free unneeded rows */
        i = 0;
@@ -1108,8 +1193,10 @@ tresize(int col, int row) {
        for(i = 0; i < minrow; i++) {
                term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
                term.alt[i]  = realloc(term.alt[i],  col * sizeof(Glyph));
        for(i = 0; i < minrow; i++) {
                term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
                term.alt[i]  = realloc(term.alt[i],  col * sizeof(Glyph));
-               memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph));
-               memset(term.alt[i]  + mincol, 0, (col - mincol) * sizeof(Glyph));
+               for(x = mincol; x < col; x++) {
+                       term.line[i][x].state = 0;
+                       term.alt[i][x].state = 0;
+               }
        }
 
        /* allocate any new rows */
        }
 
        /* allocate any new rows */
@@ -1124,6 +1211,37 @@ tresize(int col, int row) {
        tmoveto(term.c.x, term.c.y);
        /* reset scrolling region */
        tsetscroll(0, row-1);
        tmoveto(term.c.x, term.c.y);
        /* reset scrolling region */
        tsetscroll(0, row-1);
+       return (slide > 0);
+}
+
+void
+xresize(int col, int row) {
+       Pixmap newbuf;
+       int oldw, oldh;
+
+       oldw = xw.bufw;
+       oldh = xw.bufh;
+       xw.bufw = MAX(1, col * xw.cw);
+       xw.bufh = MAX(1, row * xw.ch);
+       newbuf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
+       XCopyArea(xw.dis, xw.buf, newbuf, dc.gc, 0, 0, xw.bufw, xw.bufh, 0, 0);
+       XFreePixmap(xw.dis, xw.buf);
+       XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
+       if(xw.bufw > oldw)
+               XFillRectangle(xw.dis, newbuf, dc.gc, oldw, 0,
+                               xw.bufw-oldw, MIN(xw.bufh, oldh));
+       else if(xw.bufw < oldw && (BORDER > 0 || xw.w > xw.bufw))
+               XClearArea(xw.dis, xw.win, BORDER+xw.bufw, BORDER,
+                               xw.w-xw.bufh-BORDER, BORDER+MIN(xw.bufh, oldh),
+                               False);
+       if(xw.bufh > oldh)
+               XFillRectangle(xw.dis, newbuf, dc.gc, 0, oldh,
+                               xw.bufw, xw.bufh-oldh);
+       else if(xw.bufh < oldh && (BORDER > 0 || xw.h > xw.bufh))
+               XClearArea(xw.dis, xw.win, BORDER, BORDER+xw.bufh,
+                               xw.w-2*BORDER, xw.h-xw.bufh-BORDER,
+                               False);
+       xw.buf = newbuf;
 }
 
 void
 }
 
 void
@@ -1296,7 +1414,7 @@ xdrawcursor(void) {
                xclear(oldx, oldy, oldx, oldy);
        
        /* draw the new one */
                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;
        }
                xdraws(&g.c, g, term.c.x, term.c.y, 1);
                oldx = term.c.x, oldy = term.c.y;
        }
@@ -1336,7 +1454,7 @@ draw(int redraw_all) {
        Glyph base, new;
        char buf[DRAW_BUF_SIZ];
 
        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);
                return;
 
        xclear(0, 0, term.col-1, term.row-1);
@@ -1365,27 +1483,36 @@ draw(int redraw_all) {
        }
        xdrawcursor();
        XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER);
        }
        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) {
 }
 
 #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;
 }
 
 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) {
 }
 
 void
 unmap(XEvent *ev) {
-       xw.vis = 0;
+       xw.state &= ~WIN_VISIBLE;
 }
 
 void
 }
 
 void
@@ -1398,8 +1525,11 @@ xseturgency(int add) {
 
 void
 focus(XEvent *ev) {
 
 void
 focus(XEvent *ev) {
-       if((xw.focus = ev->type == FocusIn))
+       if(ev->type == FocusIn) {
+               xw.state |= WIN_FOCUSED;
                xseturgency(0);
                xseturgency(0);
+       } else
+               xw.state &= ~WIN_FOCUSED;
        draw(SCREEN_UPDATE);
 }
 
        draw(SCREEN_UPDATE);
 }
 
@@ -1426,15 +1556,12 @@ kpress(XEvent *ev) {
        meta = e->state & Mod1Mask;
        shift = e->state & ShiftMask;
        len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
        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));
        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:
                switch(ksym) {
                case XK_Up:
                case XK_Down:
@@ -1445,10 +1572,23 @@ kpress(XEvent *ev) {
                        break;
                case XK_Insert:
                        if(shift)
                        break;
                case XK_Insert:
                        if(shift)
-                               selpaste(), draw(1);
+                               selpaste();
                        break;
                        break;
+               case XK_Return:
+                       if(IS_SET(MODE_CRLF))
+                               ttywrite("\r\n", 2);
+                       else
+                               ttywrite("\r", 1);
+                       break;
+                       /* 3. X lookup  */
                default:
                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;
                }
 }
                        break;
                }
 }
@@ -1462,16 +1602,14 @@ resize(XEvent *e) {
        
        xw.w = e->xconfigure.width;
        xw.h = e->xconfigure.height;
        
        xw.w = e->xconfigure.width;
        xw.h = e->xconfigure.height;
-       xw.bufw = xw.w - 2*BORDER;
-       xw.bufh = xw.h - 2*BORDER;
-       col = xw.bufw / xw.cw;
-       row = xw.bufh / xw.ch;
-       tresize(col, row);
+       col = (xw.w - 2*BORDER) / xw.cw;
+       row = (xw.h - 2*BORDER) / xw.ch;
+       if(col == term.col && row == term.row)
+               return;
+       if(tresize(col, row))
+               draw(SCREEN_REDRAW);
        ttyresize(col, row);
        ttyresize(col, row);
-       xw.bufh = MAX(1, xw.bufh);
-       xw.bufw = MAX(1, xw.bufw);
-       XFreePixmap(xw.dis, xw.buf);
-       xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr));
+       xresize(col, row);
 }
 
 void
 }
 
 void