initial implementation of selection and clipboard

1 files changed, 108 insertions, 3 deletions

diff --git a/st.c b/st.c
index fb1172a..864dfc7 100644
--- 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 (?) */