initial implementation of selection and clipboard

diff --git a/st.c b/st.c
index fb1172a..864dfc7 100644 (file)
--- a/st.c
+++ b/st.c
@@ -177,6 +177,9 @@ static char* kmap(KeySym);
 static void kpress(XEvent *);
 static void resize(XEvent *);
 static void focus(XEvent *);
+static void brelease(XEvent *e);
+static void bpress(XEvent *e);
+static void bmotion(XEvent *e);
 
 
 static void (*handler[LASTEvent])(XEvent *) = {
@@ -185,6 +188,9 @@ static void (*handler[LASTEvent])(XEvent *) = {
        [ConfigureNotify] = resize,
        [FocusIn] = focus,
        [FocusOut] = focus,
+       [MotionNotify] = bmotion,
+       [ButtonPress] = bpress,
+       [ButtonRelease] = brelease,
 };
 
 /* Globals */
@@ -195,6 +201,103 @@ static CSIEscape escseq;
 static int cmdfd;
 static pid_t pid;
 
+/* selection */
+// TODO: use X11 clipboard
+static int selmode = 0;
+static int selbx = -1, selby;
+static int selex, seley;
+int sb[2], se[2];
+static const char *clipboard = NULL;
+
+static inline int selected(int x, int y) {
+       if ((seley==y && selby==y)) {
+               int bx = MIN(selbx, selex);
+               int ex = MAX(selbx, selex);
+               return if(x>=bx && x<=ex)
+       }
+       return (((y>sb[1] && y<se[1]) || (y==se[1] && x<=se[0])) || \
+               (y==sb[1] && x>=sb[0] && (x<=se[0] || sb[1]!=se[1])))
+}
+
+static void getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
+       if(b) *b = e->xbutton.state,
+               *b=*b==4096?5:*b==2048?4:*b==1024?3:*b==512?2:*b==256?1:-1;
+       *x = e->xbutton.x/xw.cw;
+       *y = e->xbutton.y/xw.ch;
+       sb[0] = selby<seley?selbx:selex;
+       sb[1] = MIN(selby, seley);
+       se[0] = selby<seley?selex:selbx;
+       se[1] = MAX(selby, seley);
+}
+
+static void bpress(XEvent *e) {
+       selmode = 1;
+       selex = selbx = e->xbutton.x/xw.cw;
+       seley = selby = e->xbutton.y/xw.ch;
+}
+
+static char *getseltext() {
+       char *str, *ptr;
+       int ls, x, y, sz;
+       if(selbx==-1)
+               return NULL;
+       sz = ((xw.w/xw.ch) * (se[1]-sb[1]+2));
+       ptr = str = malloc (sz);
+       for(y = 0; y < term.row; y++) {
+               for(x = 0; x < term.col; x++) {
+                       if(term.line[y][x].c && (ls=selected(x, y))) {
+                               *ptr = term.line[y][x].c;
+                               ptr++;
+                       }
+               }
+               if (ls) {
+                       *ptr = '\n';
+                       ptr++;
+               }
+       }
+       *ptr = 0;
+       return str;
+}
+
+static void clipboard_copy(const char *str) {
+       free((void *)clipboard);
+       clipboard = str;
+}
+
+static void clipboard_paste() {
+       if(clipboard)
+               ttywrite(clipboard, strlen(clipboard));
+}
+
+// TODO: doubleclick to select word
+static void brelease(XEvent *e) {
+       int b;
+       selmode = 0;
+       getbuttoninfo(e, &b, &selex, &seley);
+       if(b==4)
+               tscrollup(1);
+       else
+       if(b==5)
+               tscrolldown(1);
+       else
+       if(selbx==selex && selby==seley) {
+               selbx = -1;
+               if(b==2)
+                       clipboard_paste();
+       } else {
+               if(b==1)
+                       clipboard_copy(getseltext());
+       }
+       draw(1);
+}
+
+static void bmotion(XEvent *e) {
+       if (selmode) {
+               getbuttoninfo(e, NULL, &selex, &seley);
+               draw(1);
+       }
+}
+
 #ifdef DEBUG
 void
 tdump(void) {
@@ -1210,7 +1313,7 @@ draw(int redraw_all) {
        int i, x, y, ox;
        Glyph base, new;
        char buf[DRAW_BUF_SIZ];
-       
+
        XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]);
        XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.bufw, xw.bufh);
        for(y = 0; y < term.row; y++) {
@@ -1218,8 +1321,10 @@ draw(int redraw_all) {
                i = ox = 0;
                for(x = 0; x < term.col; x++) {
                        new = term.line[y][x];
+                       if(selbx!=-1 && new.c && selected(x, y))
+                               new.mode = ATTR_REVERSE;
                        if(i > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
-                                               i >= DRAW_BUF_SIZ)) {
+                                       i >= DRAW_BUF_SIZ)) {
                                xdraws(buf, base, ox, y, i);
                                i = 0;
                        }
@@ -1335,7 +1440,7 @@ run(void) {
        XEvent ev;
        fd_set rfd;
        int xfd = XConnectionNumber(xw.dis);
-       long mask = ExposureMask | KeyPressMask | StructureNotifyMask | FocusChangeMask;
+       long mask = ExposureMask | KeyPressMask | StructureNotifyMask | FocusChangeMask | PointerMotionMask | ButtonPressMask | ButtonReleaseMask;
 
        XSelectInput(xw.dis, xw.win, mask);
        XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */