Split X-specific code into x.c

1 files changed, 1766 insertions, 0 deletions

diff --git a/x.c b/x.c
new file mode 100644
index 0000000..6474a01
--- /dev/null
+++ b/x.c
@@ -0,0 +1,1766 @@
+/* See LICENSE for license details. */
+#include <errno.h>
+#include <locale.h>
+#include <signal.h>
+#include <stdint.h>
+#include <sys/select.h>
+#include <time.h>
+#include <unistd.h>
+#include <libgen.h>
+#include <X11/Xatom.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+#include <X11/cursorfont.h>
+#include <X11/keysym.h>
+#include <X11/Xft/Xft.h>
+#include <X11/XKBlib.h>
+
+#include "arg.h"
+
+#define Glyph Glyph_
+#define Font Font_
+
+#include "win.h"
+#include "st.h"
+
+/* XEMBED messages */
+#define XEMBED_FOCUS_IN  4
+#define XEMBED_FOCUS_OUT 5
+
+/* macros */
+#define TRUERED(x)              (((x) & 0xff0000) >> 8)
+#define TRUEGREEN(x)            (((x) & 0xff00))
+#define TRUEBLUE(x)             (((x) & 0xff) << 8)
+
+typedef XftDraw *Draw;
+typedef XftColor Color;
+
+/* Purely graphic info */
+typedef struct {
+        Display *dpy;
+        Colormap cmap;
+        Window win;
+        Drawable buf;
+        Atom xembed, wmdeletewin, netwmname, netwmpid;
+        XIM xim;
+        XIC xic;
+        Draw draw;
+        Visual *vis;
+        XSetWindowAttributes attrs;
+        int scr;
+        int isfixed; /* is fixed geometry? */
+        int l, t; /* left and top offset */
+        int gm; /* geometry mask */
+} XWindow;
+
+typedef struct {
+        Atom xtarget;
+} XSelection;
+
+/* Font structure */
+typedef struct {
+        int height;
+        int width;
+        int ascent;
+        int descent;
+        int badslant;
+        int badweight;
+        short lbearing;
+        short rbearing;
+        XftFont *match;
+        FcFontSet *set;
+        FcPattern *pattern;
+} Font;
+
+/* Drawing Context */
+typedef struct {
+        Color *col;
+        size_t collen;
+        Font font, bfont, ifont, ibfont;
+        GC gc;
+} DC;
+
+static inline ushort sixd_to_16bit(int);
+static int xmakeglyphfontspecs(XftGlyphFontSpec *, const Glyph *, int, int, int);
+static void xdrawglyphfontspecs(const XftGlyphFontSpec *, Glyph, int, int, int);
+static void xdrawglyph(Glyph, int, int);
+static void xclear(int, int, int, int);
+static void xdrawcursor(void);
+static int xgeommasktogravity(int);
+static int xloadfont(Font *, FcPattern *);
+static void xsetsel(char *, Time);
+static void xunloadfont(Font *);
+
+static void expose(XEvent *);
+static void visibility(XEvent *);
+static void unmap(XEvent *);
+static void kpress(XEvent *);
+static void cmessage(XEvent *);
+static void resize(XEvent *);
+static void focus(XEvent *);
+static void brelease(XEvent *);
+static void bpress(XEvent *);
+static void bmotion(XEvent *);
+static void propnotify(XEvent *);
+static void selnotify(XEvent *);
+static void selclear_(XEvent *);
+static void selrequest(XEvent *);
+
+static void selcopy(Time);
+static void getbuttoninfo(XEvent *);
+static void mousereport(XEvent *);
+
+static void (*handler[LASTEvent])(XEvent *) = {
+        [KeyPress] = kpress,
+        [ClientMessage] = cmessage,
+        [ConfigureNotify] = resize,
+        [VisibilityNotify] = visibility,
+        [UnmapNotify] = unmap,
+        [Expose] = expose,
+        [FocusIn] = focus,
+        [FocusOut] = focus,
+        [MotionNotify] = bmotion,
+        [ButtonPress] = bpress,
+        [ButtonRelease] = brelease,
+/*
+ * Uncomment if you want the selection to disappear when you select something
+ * different in another window.
+ */
+/*      [SelectionClear] = selclear_, */
+        [SelectionNotify] = selnotify,
+/*
+ * PropertyNotify is only turned on when there is some INCR transfer happening
+ * for the selection retrieval.
+ */
+        [PropertyNotify] = propnotify,
+        [SelectionRequest] = selrequest,
+};
+
+/* Globals */
+static DC dc;
+static XWindow xw;
+static XSelection xsel;
+
+/* Font Ring Cache */
+enum {
+        FRC_NORMAL,
+        FRC_ITALIC,
+        FRC_BOLD,
+        FRC_ITALICBOLD
+};
+
+typedef struct {
+        XftFont *font;
+        int flags;
+        Rune unicodep;
+} Fontcache;
+
+/* Fontcache is an array now. A new font will be appended to the array. */
+static Fontcache frc[16];
+static int frclen = 0;
+
+void
+getbuttoninfo(XEvent *e)
+{
+        int type;
+        uint state = e->xbutton.state & ~(Button1Mask | forceselmod);
+
+        sel.alt = IS_SET(MODE_ALTSCREEN);
+
+        sel.oe.x = x2col(e->xbutton.x);
+        sel.oe.y = y2row(e->xbutton.y);
+        selnormalize();
+
+        sel.type = SEL_REGULAR;
+        for (type = 1; type < selmaskslen; ++type) {
+                if (match(selmasks[type], state)) {
+                        sel.type = type;
+                        break;
+                }
+        }
+}
+
+void
+mousereport(XEvent *e)
+{
+        int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
+            button = e->xbutton.button, state = e->xbutton.state,
+            len;
+        char buf[40];
+        static int ox, oy;
+
+        /* from urxvt */
+        if (e->xbutton.type == MotionNotify) {
+                if (x == ox && y == oy)
+                        return;
+                if (!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
+                        return;
+                /* MOUSE_MOTION: no reporting if no button is pressed */
+                if (IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
+                        return;
+
+                button = oldbutton + 32;
+                ox = x;
+                oy = y;
+        } else {
+                if (!IS_SET(MODE_MOUSESGR) && e->xbutton.type == ButtonRelease) {
+                        button = 3;
+                } else {
+                        button -= Button1;
+                        if (button >= 3)
+                                button += 64 - 3;
+                }
+                if (e->xbutton.type == ButtonPress) {
+                        oldbutton = button;
+                        ox = x;
+                        oy = y;
+                } else if (e->xbutton.type == ButtonRelease) {
+                        oldbutton = 3;
+                        /* MODE_MOUSEX10: no button release reporting */
+                        if (IS_SET(MODE_MOUSEX10))
+                                return;
+                        if (button == 64 || button == 65)
+                                return;
+                }
+        }
+
+        if (!IS_SET(MODE_MOUSEX10)) {
+                button += ((state & ShiftMask  ) ? 4  : 0)
+                        + ((state & Mod4Mask   ) ? 8  : 0)
+                        + ((state & ControlMask) ? 16 : 0);
+        }
+
+        if (IS_SET(MODE_MOUSESGR)) {
+                len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
+                                button, x+1, y+1,
+                                e->xbutton.type == ButtonRelease ? 'm' : 'M');
+        } else if (x < 223 && y < 223) {
+                len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
+                                32+button, 32+x+1, 32+y+1);
+        } else {
+                return;
+        }
+
+        ttywrite(buf, len);
+}
+
+void
+bpress(XEvent *e)
+{
+        struct timespec now;
+        MouseShortcut *ms;
+
+        if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+                mousereport(e);
+                return;
+        }
+
+        for (ms = mshortcuts; ms < mshortcuts + mshortcutslen; ms++) {
+                if (e->xbutton.button == ms->b
+                                && match(ms->mask, e->xbutton.state)) {
+                        ttysend(ms->s, strlen(ms->s));
+                        return;
+                }
+        }
+
+        if (e->xbutton.button == Button1) {
+                clock_gettime(CLOCK_MONOTONIC, &now);
+
+                /* Clear previous selection, logically and visually. */
+                selclear_(NULL);
+                sel.mode = SEL_EMPTY;
+                sel.type = SEL_REGULAR;
+                sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
+                sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
+
+                /*
+                 * If the user clicks below predefined timeouts specific
+                 * snapping behaviour is exposed.
+                 */
+                if (TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
+                        sel.snap = SNAP_LINE;
+                } else if (TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
+                        sel.snap = SNAP_WORD;
+                } else {
+                        sel.snap = 0;
+                }
+                selnormalize();
+
+                if (sel.snap != 0)
+                        sel.mode = SEL_READY;
+                tsetdirt(sel.nb.y, sel.ne.y);
+                sel.tclick2 = sel.tclick1;
+                sel.tclick1 = now;
+        }
+}
+
+void
+selcopy(Time t)
+{
+        xsetsel(getsel(), t);
+}
+
+void
+propnotify(XEvent *e)
+{
+        XPropertyEvent *xpev;
+        Atom clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+
+        xpev = &e->xproperty;
+        if (xpev->state == PropertyNewValue &&
+                        (xpev->atom == XA_PRIMARY ||
+                         xpev->atom == clipboard)) {
+                selnotify(e);
+        }
+}
+
+void
+selnotify(XEvent *e)
+{
+        ulong nitems, ofs, rem;
+        int format;
+        uchar *data, *last, *repl;
+        Atom type, incratom, property;
+
+        incratom = XInternAtom(xw.dpy, "INCR", 0);
+
+        ofs = 0;
+        if (e->type == SelectionNotify) {
+                property = e->xselection.property;
+        } else if(e->type == PropertyNotify) {
+                property = e->xproperty.atom;
+        } else {
+                return;
+        }
+        if (property == None)
+                return;
+
+        do {
+                if (XGetWindowProperty(xw.dpy, xw.win, property, ofs,
+                                        BUFSIZ/4, False, AnyPropertyType,
+                                        &type, &format, &nitems, &rem,
+                                        &data)) {
+                        fprintf(stderr, "Clipboard allocation failed\n");
+                        return;
+                }
+
+                if (e->type == PropertyNotify && nitems == 0 && rem == 0) {
+                        /*
+                         * If there is some PropertyNotify with no data, then
+                         * this is the signal of the selection owner that all
+                         * data has been transferred. We won't need to receive
+                         * PropertyNotify events anymore.
+                         */
+                        MODBIT(xw.attrs.event_mask, 0, PropertyChangeMask);
+                        XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
+                                        &xw.attrs);
+                }
+
+                if (type == incratom) {
+                        /*
+                         * Activate the PropertyNotify events so we receive
+                         * when the selection owner does send us the next
+                         * chunk of data.
+                         */
+                        MODBIT(xw.attrs.event_mask, 1, PropertyChangeMask);
+                        XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask,
+                                        &xw.attrs);
+
+                        /*
+                         * Deleting the property is the transfer start signal.
+                         */
+                        XDeleteProperty(xw.dpy, xw.win, (int)property);
+                        continue;
+                }
+
+                /*
+                 * As seen in getsel:
+                 * Line endings are inconsistent in the terminal and GUI world
+                 * copy and pasting. When receiving some selection data,
+                 * replace all '\n' with '\r'.
+                 * FIXME: Fix the computer world.
+                 */
+                repl = data;
+                last = data + nitems * format / 8;
+                while ((repl = memchr(repl, '\n', last - repl))) {
+                        *repl++ = '\r';
+                }
+
+                if (IS_SET(MODE_BRCKTPASTE) && ofs == 0)
+                        ttywrite("\033[200~", 6);
+                ttysend((char *)data, nitems * format / 8);
+                if (IS_SET(MODE_BRCKTPASTE) && rem == 0)
+                        ttywrite("\033[201~", 6);
+                XFree(data);
+                /* number of 32-bit chunks returned */
+                ofs += nitems * format / 32;
+        } while (rem > 0);
+
+        /*
+         * Deleting the property again tells the selection owner to send the
+         * next data chunk in the property.
+         */
+        XDeleteProperty(xw.dpy, xw.win, (int)property);
+}
+
+void
+xselpaste(void)
+{
+        XConvertSelection(xw.dpy, XA_PRIMARY, xsel.xtarget, XA_PRIMARY,
+                        xw.win, CurrentTime);
+}
+
+void
+xclipcopy(void)
+{
+        Atom clipboard;
+
+        if (sel.clipboard != NULL)
+                free(sel.clipboard);
+
+        if (sel.primary != NULL) {
+                sel.clipboard = xstrdup(sel.primary);
+                clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+                XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
+        }
+}
+
+void
+xclippaste(void)
+{
+        Atom clipboard;
+
+        clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+        XConvertSelection(xw.dpy, clipboard, xsel.xtarget, clipboard,
+                        xw.win, CurrentTime);
+}
+
+void
+selclear_(XEvent *e)
+{
+        selclear();
+}
+
+void
+selrequest(XEvent *e)
+{
+        XSelectionRequestEvent *xsre;
+        XSelectionEvent xev;
+        Atom xa_targets, string, clipboard;
+        char *seltext;
+
+        xsre = (XSelectionRequestEvent *) e;
+        xev.type = SelectionNotify;
+        xev.requestor = xsre->requestor;
+        xev.selection = xsre->selection;
+        xev.target = xsre->target;
+        xev.time = xsre->time;
+        if (xsre->property == None)
+                xsre->property = xsre->target;
+
+        /* reject */
+        xev.property = None;
+
+        xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
+        if (xsre->target == xa_targets) {
+                /* respond with the supported type */
+                string = xsel.xtarget;
+                XChangeProperty(xsre->display, xsre->requestor, xsre->property,
+                                XA_ATOM, 32, PropModeReplace,
+                                (uchar *) &string, 1);
+                xev.property = xsre->property;
+        } else if (xsre->target == xsel.xtarget || xsre->target == XA_STRING) {
+                /*
+                 * xith XA_STRING non ascii characters may be incorrect in the
+                 * requestor. It is not our problem, use utf8.
+                 */
+                clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
+                if (xsre->selection == XA_PRIMARY) {
+                        seltext = sel.primary;
+                } else if (xsre->selection == clipboard) {
+                        seltext = sel.clipboard;
+                } else {
+                        fprintf(stderr,
+                                "Unhandled clipboard selection 0x%lx\n",
+                                xsre->selection);
+                        return;
+                }
+                if (seltext != NULL) {
+                        XChangeProperty(xsre->display, xsre->requestor,
+                                        xsre->property, xsre->target,
+                                        8, PropModeReplace,
+                                        (uchar *)seltext, strlen(seltext));
+                        xev.property = xsre->property;
+                }
+        }
+
+        /* all done, send a notification to the listener */
+        if (!XSendEvent(xsre->display, xsre->requestor, 1, 0, (XEvent *) &xev))
+                fprintf(stderr, "Error sending SelectionNotify event\n");
+}
+
+void
+xsetsel(char *str, Time t)
+{
+        free(sel.primary);
+        sel.primary = str;
+
+        XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, t);
+        if (XGetSelectionOwner(xw.dpy, XA_PRIMARY) != xw.win)
+                selclear_(NULL);
+}
+
+void
+brelease(XEvent *e)
+{
+        if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+                mousereport(e);
+                return;
+        }
+
+        if (e->xbutton.button == Button2) {
+                xselpaste();
+        } else if (e->xbutton.button == Button1) {
+                if (sel.mode == SEL_READY) {
+                        getbuttoninfo(e);
+                        selcopy(e->xbutton.time);
+                } else
+                        selclear_(NULL);
+                sel.mode = SEL_IDLE;
+                tsetdirt(sel.nb.y, sel.ne.y);
+        }
+}
+
+void
+bmotion(XEvent *e)
+{
+        int oldey, oldex, oldsby, oldsey;
+
+        if (IS_SET(MODE_MOUSE) && !(e->xbutton.state & forceselmod)) {
+                mousereport(e);
+                return;
+        }
+
+        if (!sel.mode)
+                return;
+
+        sel.mode = SEL_READY;
+        oldey = sel.oe.y;
+        oldex = sel.oe.x;
+        oldsby = sel.nb.y;
+        oldsey = sel.ne.y;
+        getbuttoninfo(e);
+
+        if (oldey != sel.oe.y || oldex != sel.oe.x)
+                tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
+}
+
+void
+xresize(int col, int row)
+{
+        win.tw = MAX(1, col * win.cw);
+        win.th = MAX(1, row * win.ch);
+
+        XFreePixmap(xw.dpy, xw.buf);
+        xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
+                        DefaultDepth(xw.dpy, xw.scr));
+        XftDrawChange(xw.draw, xw.buf);
+        xclear(0, 0, win.w, win.h);
+}
+
+ushort
+sixd_to_16bit(int x)
+{
+        return x == 0 ? 0 : 0x3737 + 0x2828 * x;
+}
+
+int
+xloadcolor(int i, const char *name, Color *ncolor)
+{
+        XRenderColor color = { .alpha = 0xffff };
+
+        if (!name) {
+                if (BETWEEN(i, 16, 255)) { /* 256 color */
+                        if (i < 6*6*6+16) { /* same colors as xterm */
+                                color.red   = sixd_to_16bit( ((i-16)/36)%6 );
+                                color.green = sixd_to_16bit( ((i-16)/6) %6 );
+                                color.blue  = sixd_to_16bit( ((i-16)/1) %6 );
+                        } else { /* greyscale */
+                                color.red = 0x0808 + 0x0a0a * (i - (6*6*6+16));
+                                color.green = color.blue = color.red;
+                        }
+                        return XftColorAllocValue(xw.dpy, xw.vis,
+                                                  xw.cmap, &color, ncolor);
+                } else
+                        name = colorname[i];
+        }
+
+        return XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, ncolor);
+}
+
+void
+xloadcols(void)
+{
+        int i;
+        static int loaded;
+        Color *cp;
+
+        dc.collen = MAX(colornamelen, 256);
+        dc.col = xmalloc(dc.collen * sizeof(Color));
+
+        if (loaded) {
+                for (cp = dc.col; cp < &dc.col[dc.collen]; ++cp)
+                        XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
+        }
+
+        for (i = 0; i < dc.collen; i++)
+                if (!xloadcolor(i, NULL, &dc.col[i])) {
+                        if (colorname[i])
+                                die("Could not allocate color '%s'\n", colorname[i]);
+                        else
+                                die("Could not allocate color %d\n", i);
+                }
+        loaded = 1;
+}
+
+int
+xsetcolorname(int x, const char *name)
+{
+        Color ncolor;
+
+        if (!BETWEEN(x, 0, dc.collen))
+                return 1;
+
+
+        if (!xloadcolor(x, name, &ncolor))
+                return 1;
+
+        XftColorFree(xw.dpy, xw.vis, xw.cmap, &dc.col[x]);
+        dc.col[x] = ncolor;
+
+        return 0;
+}
+
+/*
+ * Absolute coordinates.
+ */
+void
+xclear(int x1, int y1, int x2, int y2)
+{
+        XftDrawRect(xw.draw,
+                        &dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
+                        x1, y1, x2-x1, y2-y1);
+}
+
+void
+xhints(void)
+{
+        XClassHint class = {opt_name ? opt_name : termname,
+                            opt_class ? opt_class : termname};
+        XWMHints wm = {.flags = InputHint, .input = 1};
+        XSizeHints *sizeh = NULL;
+
+        sizeh = XAllocSizeHints();
+
+        sizeh->flags = PSize | PResizeInc | PBaseSize;
+        sizeh->height = win.h;
+        sizeh->width = win.w;
+        sizeh->height_inc = win.ch;
+        sizeh->width_inc = win.cw;
+        sizeh->base_height = 2 * borderpx;
+        sizeh->base_width = 2 * borderpx;
+        if (xw.isfixed) {
+                sizeh->flags |= PMaxSize | PMinSize;
+                sizeh->min_width = sizeh->max_width = win.w;
+                sizeh->min_height = sizeh->max_height = win.h;
+        }
+        if (xw.gm & (XValue|YValue)) {
+                sizeh->flags |= USPosition | PWinGravity;
+                sizeh->x = xw.l;
+                sizeh->y = xw.t;
+                sizeh->win_gravity = xgeommasktogravity(xw.gm);
+        }
+
+        XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
+                        &class);
+        XFree(sizeh);
+}
+
+int
+xgeommasktogravity(int mask)
+{
+        switch (mask & (XNegative|YNegative)) {
+        case 0:
+                return NorthWestGravity;
+        case XNegative:
+                return NorthEastGravity;
+        case YNegative:
+                return SouthWestGravity;
+        }
+
+        return SouthEastGravity;
+}
+
+int
+xloadfont(Font *f, FcPattern *pattern)
+{
+        FcPattern *configured;
+        FcPattern *match;
+        FcResult result;
+        XGlyphInfo extents;
+        int wantattr, haveattr;
+
+        /*
+         * Manually configure instead of calling XftMatchFont
+         * so that we can use the configured pattern for
+         * "missing glyph" lookups.
+         */
+        configured = FcPatternDuplicate(pattern);
+        if (!configured)
+                return 1;
+
+        FcConfigSubstitute(NULL, configured, FcMatchPattern);
+        XftDefaultSubstitute(xw.dpy, xw.scr, configured);
+
+        match = FcFontMatch(NULL, configured, &result);
+        if (!match) {
+                FcPatternDestroy(configured);
+                return 1;
+        }
+
+        if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
+                FcPatternDestroy(configured);
+                FcPatternDestroy(match);
+                return 1;
+        }
+
+        if ((XftPatternGetInteger(pattern, "slant", 0, &wantattr) ==
+            XftResultMatch)) {
+                /*
+                 * Check if xft was unable to find a font with the appropriate
+                 * slant but gave us one anyway. Try to mitigate.
+                 */
+                if ((XftPatternGetInteger(f->match->pattern, "slant", 0,
+                    &haveattr) != XftResultMatch) || haveattr < wantattr) {
+                        f->badslant = 1;
+                        fputs("st: font slant does not match\n", stderr);
+                }
+        }
+
+        if ((XftPatternGetInteger(pattern, "weight", 0, &wantattr) ==
+            XftResultMatch)) {
+                if ((XftPatternGetInteger(f->match->pattern, "weight", 0,
+                    &haveattr) != XftResultMatch) || haveattr != wantattr) {
+                        f->badweight = 1;
+                        fputs("st: font weight does not match\n", stderr);
+                }
+        }
+
+        XftTextExtentsUtf8(xw.dpy, f->match,
+                (const FcChar8 *) ascii_printable,
+                strlen(ascii_printable), &extents);
+
+        f->set = NULL;
+        f->pattern = configured;
+
+        f->ascent = f->match->ascent;
+        f->descent = f->match->descent;
+        f->lbearing = 0;
+        f->rbearing = f->match->max_advance_width;
+
+        f->height = f->ascent + f->descent;
+        f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
+
+        return 0;
+}
+
+void
+xloadfonts(char *fontstr, double fontsize)
+{
+        FcPattern *pattern;
+        double fontval;
+        float ceilf(float);
+
+        if (fontstr[0] == '-') {
+                pattern = XftXlfdParse(fontstr, False, False);
+        } else {
+                pattern = FcNameParse((FcChar8 *)fontstr);
+        }
+
+        if (!pattern)
+                die("st: can't open font %s\n", fontstr);
+
+        if (fontsize > 1) {
+                FcPatternDel(pattern, FC_PIXEL_SIZE);
+                FcPatternDel(pattern, FC_SIZE);
+                FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
+                usedfontsize = fontsize;
+        } else {
+                if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
+                                FcResultMatch) {
+                        usedfontsize = fontval;
+                } else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
+                                FcResultMatch) {
+                        usedfontsize = -1;
+                } else {
+                        /*
+                         * Default font size is 12, if none given. This is to
+                         * have a known usedfontsize value.
+                         */
+                        FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
+                        usedfontsize = 12;
+                }
+                defaultfontsize = usedfontsize;
+        }
+
+        if (xloadfont(&dc.font, pattern))
+                die("st: can't open font %s\n", fontstr);
+
+        if (usedfontsize < 0) {
+                FcPatternGetDouble(dc.font.match->pattern,
+                                   FC_PIXEL_SIZE, 0, &fontval);
+                usedfontsize = fontval;
+                if (fontsize == 0)
+                        defaultfontsize = fontval;
+        }
+
+        /* Setting character width and height. */
+        win.cw = ceilf(dc.font.width * cwscale);
+        win.ch = ceilf(dc.font.height * chscale);
+
+        FcPatternDel(pattern, FC_SLANT);
+        FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
+        if (xloadfont(&dc.ifont, pattern))
+                die("st: can't open font %s\n", fontstr);
+
+        FcPatternDel(pattern, FC_WEIGHT);
+        FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
+        if (xloadfont(&dc.ibfont, pattern))
+                die("st: can't open font %s\n", fontstr);
+
+        FcPatternDel(pattern, FC_SLANT);
+        FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
+        if (xloadfont(&dc.bfont, pattern))
+                die("st: can't open font %s\n", fontstr);
+
+        FcPatternDestroy(pattern);
+}
+
+void
+xunloadfont(Font *f)
+{
+        XftFontClose(xw.dpy, f->match);
+        FcPatternDestroy(f->pattern);
+        if (f->set)
+                FcFontSetDestroy(f->set);
+}
+
+void
+xunloadfonts(void)
+{
+        /* Free the loaded fonts in the font cache.  */
+        while (frclen > 0)
+                XftFontClose(xw.dpy, frc[--frclen].font);
+
+        xunloadfont(&dc.font);
+        xunloadfont(&dc.bfont);
+        xunloadfont(&dc.ifont);
+        xunloadfont(&dc.ibfont);
+}
+
+void
+xinit(void)
+{
+        XGCValues gcvalues;
+        Cursor cursor;
+        Window parent;
+        pid_t thispid = getpid();
+        XColor xmousefg, xmousebg;
+
+        if (!(xw.dpy = XOpenDisplay(NULL)))
+                die("Can't open display\n");
+        xw.scr = XDefaultScreen(xw.dpy);
+        xw.vis = XDefaultVisual(xw.dpy, xw.scr);
+
+        /* font */
+        if (!FcInit())
+                die("Could not init fontconfig.\n");
+
+        usedfont = (opt_font == NULL)? font : opt_font;
+        xloadfonts(usedfont, 0);
+
+        /* colors */
+        xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
+        xloadcols();
+
+        /* adjust fixed window geometry */
+        win.w = 2 * borderpx + term.col * win.cw;
+        win.h = 2 * borderpx + term.row * win.ch;
+        if (xw.gm & XNegative)
+                xw.l += DisplayWidth(xw.dpy, xw.scr) - win.w - 2;
+        if (xw.gm & YNegative)
+                xw.t += DisplayHeight(xw.dpy, xw.scr) - win.h - 2;
+
+        /* Events */
+        xw.attrs.background_pixel = dc.col[defaultbg].pixel;
+        xw.attrs.border_pixel = dc.col[defaultbg].pixel;
+        xw.attrs.bit_gravity = NorthWestGravity;
+        xw.attrs.event_mask = FocusChangeMask | KeyPressMask
+                | ExposureMask | VisibilityChangeMask | StructureNotifyMask
+                | ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
+        xw.attrs.colormap = xw.cmap;
+
+        if (!(opt_embed && (parent = strtol(opt_embed, NULL, 0))))
+                parent = XRootWindow(xw.dpy, xw.scr);
+        xw.win = XCreateWindow(xw.dpy, parent, xw.l, xw.t,
+                        win.w, win.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
+                        xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
+                        | CWEventMask | CWColormap, &xw.attrs);
+
+        memset(&gcvalues, 0, sizeof(gcvalues));
+        gcvalues.graphics_exposures = False;
+        dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
+                        &gcvalues);
+        xw.buf = XCreatePixmap(xw.dpy, xw.win, win.w, win.h,
+                        DefaultDepth(xw.dpy, xw.scr));
+        XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
+        XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, win.w, win.h);
+
+        /* Xft rendering context */
+        xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
+
+        /* input methods */
+        if ((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
+                XSetLocaleModifiers("@im=local");
+                if ((xw.xim =  XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
+                        XSetLocaleModifiers("@im=");
+                        if ((xw.xim = XOpenIM(xw.dpy,
+                                        NULL, NULL, NULL)) == NULL) {
+                                die("XOpenIM failed. Could not open input"
+                                        " device.\n");
+                        }
+                }
+        }
+        xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
+                                           | XIMStatusNothing, XNClientWindow, xw.win,
+                                           XNFocusWindow, xw.win, NULL);
+        if (xw.xic == NULL)
+                die("XCreateIC failed. Could not obtain input method.\n");
+
+        /* white cursor, black outline */
+        cursor = XCreateFontCursor(xw.dpy, mouseshape);
+        XDefineCursor(xw.dpy, xw.win, cursor);
+
+        if (XParseColor(xw.dpy, xw.cmap, colorname[mousefg], &xmousefg) == 0) {
+                xmousefg.red   = 0xffff;
+                xmousefg.green = 0xffff;
+                xmousefg.blue  = 0xffff;
+        }
+
+        if (XParseColor(xw.dpy, xw.cmap, colorname[mousebg], &xmousebg) == 0) {
+                xmousebg.red   = 0x0000;
+                xmousebg.green = 0x0000;
+                xmousebg.blue  = 0x0000;
+        }
+
+        XRecolorCursor(xw.dpy, cursor, &xmousefg, &xmousebg);
+
+        xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
+        xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
+        xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
+        XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
+
+        xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
+        XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
+                        PropModeReplace, (uchar *)&thispid, 1);
+
+        resettitle();
+        XMapWindow(xw.dpy, xw.win);
+        xhints();
+        XSync(xw.dpy, False);
+
+        xsel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
+        if (xsel.xtarget == None)
+                xsel.xtarget = XA_STRING;
+}
+
+int
+xmakeglyphfontspecs(XftGlyphFontSpec *specs, const Glyph *glyphs, int len, int x, int y)
+{
+        float winx = borderpx + x * win.cw, winy = borderpx + y * win.ch, xp, yp;
+        ushort mode, prevmode = USHRT_MAX;
+        Font *font = &dc.font;
+        int frcflags = FRC_NORMAL;
+        float runewidth = win.cw;
+        Rune rune;
+        FT_UInt glyphidx;
+        FcResult fcres;
+        FcPattern *fcpattern, *fontpattern;
+        FcFontSet *fcsets[] = { NULL };
+        FcCharSet *fccharset;
+        int i, f, numspecs = 0;
+
+        for (i = 0, xp = winx, yp = winy + font->ascent; i < len; ++i) {
+                /* Fetch rune and mode for current glyph. */
+                rune = glyphs[i].u;
+                mode = glyphs[i].mode;
+
+                /* Skip dummy wide-character spacing. */
+                if (mode == ATTR_WDUMMY)
+                        continue;
+
+                /* Determine font for glyph if different from previous glyph. */
+                if (prevmode != mode) {
+                        prevmode = mode;
+                        font = &dc.font;
+                        frcflags = FRC_NORMAL;
+                        runewidth = win.cw * ((mode & ATTR_WIDE) ? 2.0f : 1.0f);
+                        if ((mode & ATTR_ITALIC) && (mode & ATTR_BOLD)) {
+                                font = &dc.ibfont;
+                                frcflags = FRC_ITALICBOLD;
+                        } else if (mode & ATTR_ITALIC) {
+                                font = &dc.ifont;
+                                frcflags = FRC_ITALIC;
+                        } else if (mode & ATTR_BOLD) {
+                                font = &dc.bfont;
+                                frcflags = FRC_BOLD;
+                        }
+                        yp = winy + font->ascent;
+                }
+
+                /* Lookup character index with default font. */
+                glyphidx = XftCharIndex(xw.dpy, font->match, rune);
+                if (glyphidx) {
+                        specs[numspecs].font = font->match;
+                        specs[numspecs].glyph = glyphidx;
+                        specs[numspecs].x = (short)xp;
+                        specs[numspecs].y = (short)yp;
+                        xp += runewidth;
+                        numspecs++;
+                        continue;
+                }
+
+                /* Fallback on font cache, search the font cache for match. */
+                for (f = 0; f < frclen; f++) {
+                        glyphidx = XftCharIndex(xw.dpy, frc[f].font, rune);
+                        /* Everything correct. */
+                        if (glyphidx && frc[f].flags == frcflags)
+                                break;
+                        /* We got a default font for a not found glyph. */
+                        if (!glyphidx && frc[f].flags == frcflags
+                                        && frc[f].unicodep == rune) {
+                                break;
+                        }
+                }
+
+                /* Nothing was found. Use fontconfig to find matching font. */
+                if (f >= frclen) {
+                        if (!font->set)
+                                font->set = FcFontSort(0, font->pattern,
+                                                       1, 0, &fcres);
+                        fcsets[0] = font->set;
+
+                        /*
+                         * Nothing was found in the cache. Now use
+                         * some dozen of Fontconfig calls to get the
+                         * font for one single character.
+                         *
+                         * Xft and fontconfig are design failures.
+                         */
+                        fcpattern = FcPatternDuplicate(font->pattern);
+                        fccharset = FcCharSetCreate();
+
+                        FcCharSetAddChar(fccharset, rune);
+                        FcPatternAddCharSet(fcpattern, FC_CHARSET,
+                                        fccharset);
+                        FcPatternAddBool(fcpattern, FC_SCALABLE, 1);
+
+                        FcConfigSubstitute(0, fcpattern,
+                                        FcMatchPattern);
+                        FcDefaultSubstitute(fcpattern);
+
+                        fontpattern = FcFontSetMatch(0, fcsets, 1,
+                                        fcpattern, &fcres);
+
+                        /*
+                         * Overwrite or create the new cache entry.
+                         */
+                        if (frclen >= LEN(frc)) {
+                                frclen = LEN(frc) - 1;
+                                XftFontClose(xw.dpy, frc[frclen].font);
+                                frc[frclen].unicodep = 0;
+                        }
+
+                        frc[frclen].font = XftFontOpenPattern(xw.dpy,
+                                        fontpattern);
+                        frc[frclen].flags = frcflags;
+                        frc[frclen].unicodep = rune;
+
+                        glyphidx = XftCharIndex(xw.dpy, frc[frclen].font, rune);
+
+                        f = frclen;
+                        frclen++;
+
+                        FcPatternDestroy(fcpattern);
+                        FcCharSetDestroy(fccharset);
+                }
+
+                specs[numspecs].font = frc[f].font;
+                specs[numspecs].glyph = glyphidx;
+                specs[numspecs].x = (short)xp;
+                specs[numspecs].y = (short)yp;
+                xp += runewidth;
+                numspecs++;
+        }
+
+        return numspecs;
+}
+
+void
+xdrawglyphfontspecs(const XftGlyphFontSpec *specs, Glyph base, int len, int x, int y)
+{
+        int charlen = len * ((base.mode & ATTR_WIDE) ? 2 : 1);
+        int winx = borderpx + x * win.cw, winy = borderpx + y * win.ch,
+            width = charlen * win.cw;
+        Color *fg, *bg, *temp, revfg, revbg, truefg, truebg;
+        XRenderColor colfg, colbg;
+        XRectangle r;
+
+        /* Fallback on color display for attributes not supported by the font */
+        if (base.mode & ATTR_ITALIC && base.mode & ATTR_BOLD) {
+                if (dc.ibfont.badslant || dc.ibfont.badweight)
+                        base.fg = defaultattr;
+        } else if ((base.mode & ATTR_ITALIC && dc.ifont.badslant) ||
+            (base.mode & ATTR_BOLD && dc.bfont.badweight)) {
+                base.fg = defaultattr;
+        }
+
+        if (IS_TRUECOL(base.fg)) {
+                colfg.alpha = 0xffff;
+                colfg.red = TRUERED(base.fg);
+                colfg.green = TRUEGREEN(base.fg);
+                colfg.blue = TRUEBLUE(base.fg);
+                XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
+                fg = &truefg;
+        } else {
+                fg = &dc.col[base.fg];
+        }
+
+        if (IS_TRUECOL(base.bg)) {
+                colbg.alpha = 0xffff;
+                colbg.green = TRUEGREEN(base.bg);
+                colbg.red = TRUERED(base.bg);
+                colbg.blue = TRUEBLUE(base.bg);
+                XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
+                bg = &truebg;
+        } else {
+                bg = &dc.col[base.bg];
+        }
+
+        /* Change basic system colors [0-7] to bright system colors [8-15] */
+        if ((base.mode & ATTR_BOLD_FAINT) == ATTR_BOLD && BETWEEN(base.fg, 0, 7))
+                fg = &dc.col[base.fg + 8];
+
+        if (IS_SET(MODE_REVERSE)) {
+                if (fg == &dc.col[defaultfg]) {
+                        fg = &dc.col[defaultbg];
+                } else {
+                        colfg.red = ~fg->color.red;
+                        colfg.green = ~fg->color.green;
+                        colfg.blue = ~fg->color.blue;
+                        colfg.alpha = fg->color.alpha;
+                        XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg,
+                                        &revfg);
+                        fg = &revfg;
+                }
+
+                if (bg == &dc.col[defaultbg]) {
+                        bg = &dc.col[defaultfg];
+                } else {
+                        colbg.red = ~bg->color.red;
+                        colbg.green = ~bg->color.green;
+                        colbg.blue = ~bg->color.blue;
+                        colbg.alpha = bg->color.alpha;
+                        XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg,
+                                        &revbg);
+                        bg = &revbg;
+                }
+        }
+
+        if (base.mode & ATTR_REVERSE) {
+                temp = fg;
+                fg = bg;
+                bg = temp;
+        }
+
+        if ((base.mode & ATTR_BOLD_FAINT) == ATTR_FAINT) {
+                colfg.red = fg->color.red / 2;
+                colfg.green = fg->color.green / 2;
+                colfg.blue = fg->color.blue / 2;
+                XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
+                fg = &revfg;
+        }
+
+        if (base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
+                fg = bg;
+
+        if (base.mode & ATTR_INVISIBLE)
+                fg = bg;
+
+        /* Intelligent cleaning up of the borders. */
+        if (x == 0) {
+                xclear(0, (y == 0)? 0 : winy, borderpx,
+                        winy + win.ch + ((y >= term.row-1)? win.h : 0));
+        }
+        if (x + charlen >= term.col) {
+                xclear(winx + width, (y == 0)? 0 : winy, win.w,
+                        ((y >= term.row-1)? win.h : (winy + win.ch)));
+        }
+        if (y == 0)
+                xclear(winx, 0, winx + width, borderpx);
+        if (y == term.row-1)
+                xclear(winx, winy + win.ch, winx + width, win.h);
+
+        /* Clean up the region we want to draw to. */
+        XftDrawRect(xw.draw, bg, winx, winy, width, win.ch);
+
+        /* Set the clip region because Xft is sometimes dirty. */
+        r.x = 0;
+        r.y = 0;
+        r.height = win.ch;
+        r.width = width;
+        XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
+
+        /* Render the glyphs. */
+        XftDrawGlyphFontSpec(xw.draw, fg, specs, len);
+
+        /* Render underline and strikethrough. */
+        if (base.mode & ATTR_UNDERLINE) {
+                XftDrawRect(xw.draw, fg, winx, winy + dc.font.ascent + 1,
+                                width, 1);
+        }
+
+        if (base.mode & ATTR_STRUCK) {
+                XftDrawRect(xw.draw, fg, winx, winy + 2 * dc.font.ascent / 3,
+                                width, 1);
+        }
+
+        /* Reset clip to none. */
+        XftDrawSetClip(xw.draw, 0);
+}
+
+void
+xdrawglyph(Glyph g, int x, int y)
+{
+        int numspecs;
+        XftGlyphFontSpec spec;
+
+        numspecs = xmakeglyphfontspecs(&spec, &g, 1, x, y);
+        xdrawglyphfontspecs(&spec, g, numspecs, x, y);
+}
+
+void
+xdrawcursor(void)
+{
+        static int oldx = 0, oldy = 0;
+        int curx;
+        Glyph g = {' ', ATTR_NULL, defaultbg, defaultcs}, og;
+        int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
+        Color drawcol;
+
+        LIMIT(oldx, 0, term.col-1);
+        LIMIT(oldy, 0, term.row-1);
+
+        curx = term.c.x;
+
+        /* adjust position if in dummy */
+        if (term.line[oldy][oldx].mode & ATTR_WDUMMY)
+                oldx--;
+        if (term.line[term.c.y][curx].mode & ATTR_WDUMMY)
+                curx--;
+
+        /* remove the old cursor */
+        og = term.line[oldy][oldx];
+        if (ena_sel && selected(oldx, oldy))
+                og.mode ^= ATTR_REVERSE;
+        xdrawglyph(og, oldx, oldy);
+
+        g.u = term.line[term.c.y][term.c.x].u;
+
+        /*
+         * Select the right color for the right mode.
+         */
+        if (IS_SET(MODE_REVERSE)) {
+                g.mode |= ATTR_REVERSE;
+                g.bg = defaultfg;
+                if (ena_sel && selected(term.c.x, term.c.y)) {
+                        drawcol = dc.col[defaultcs];
+                        g.fg = defaultrcs;
+                } else {
+                        drawcol = dc.col[defaultrcs];
+                        g.fg = defaultcs;
+                }
+        } else {
+                if (ena_sel && selected(term.c.x, term.c.y)) {
+                        drawcol = dc.col[defaultrcs];
+                        g.fg = defaultfg;
+                        g.bg = defaultrcs;
+                } else {
+                        drawcol = dc.col[defaultcs];
+                }
+        }
+
+        if (IS_SET(MODE_HIDE))
+                return;
+
+        /* draw the new one */
+        if (win.state & WIN_FOCUSED) {
+                switch (win.cursor) {
+                case 7: /* st extension: snowman */
+                        utf8decode("☃", &g.u, UTF_SIZ);
+                case 0: /* Blinking Block */
+                case 1: /* Blinking Block (Default) */
+                case 2: /* Steady Block */
+                        g.mode |= term.line[term.c.y][curx].mode & ATTR_WIDE;
+                        xdrawglyph(g, term.c.x, term.c.y);
+                        break;
+                case 3: /* Blinking Underline */
+                case 4: /* Steady Underline */
+                        XftDrawRect(xw.draw, &drawcol,
+                                        borderpx + curx * win.cw,
+                                        borderpx + (term.c.y + 1) * win.ch - \
+                                                cursorthickness,
+                                        win.cw, cursorthickness);
+                        break;
+                case 5: /* Blinking bar */
+                case 6: /* Steady bar */
+                        XftDrawRect(xw.draw, &drawcol,
+                                        borderpx + curx * win.cw,
+                                        borderpx + term.c.y * win.ch,
+                                        cursorthickness, win.ch);
+                        break;
+                }
+        } else {
+                XftDrawRect(xw.draw, &drawcol,
+                                borderpx + curx * win.cw,
+                                borderpx + term.c.y * win.ch,
+                                win.cw - 1, 1);
+                XftDrawRect(xw.draw, &drawcol,
+                                borderpx + curx * win.cw,
+                                borderpx + term.c.y * win.ch,
+                                1, win.ch - 1);
+                XftDrawRect(xw.draw, &drawcol,
+                                borderpx + (curx + 1) * win.cw - 1,
+                                borderpx + term.c.y * win.ch,
+                                1, win.ch - 1);
+                XftDrawRect(xw.draw, &drawcol,
+                                borderpx + curx * win.cw,
+                                borderpx + (term.c.y + 1) * win.ch - 1,
+                                win.cw, 1);
+        }
+        oldx = curx, oldy = term.c.y;
+}
+
+void
+xsetenv(void)
+{
+        char buf[sizeof(long) * 8 + 1];
+
+        snprintf(buf, sizeof(buf), "%lu", xw.win);
+        setenv("WINDOWID", buf, 1);
+}
+
+void
+xsettitle(char *p)
+{
+        XTextProperty prop;
+
+        Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
+                        &prop);
+        XSetWMName(xw.dpy, xw.win, &prop);
+        XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
+        XFree(prop.value);
+}
+
+void
+draw(void)
+{
+        drawregion(0, 0, term.col, term.row);
+        XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, win.w,
+                        win.h, 0, 0);
+        XSetForeground(xw.dpy, dc.gc,
+                        dc.col[IS_SET(MODE_REVERSE)?
+                                defaultfg : defaultbg].pixel);
+}
+
+void
+drawregion(int x1, int y1, int x2, int y2)
+{
+        int i, x, y, ox, numspecs;
+        Glyph base, new;
+        XftGlyphFontSpec *specs;
+        int ena_sel = sel.ob.x != -1 && sel.alt == IS_SET(MODE_ALTSCREEN);
+
+        if (!(win.state & WIN_VISIBLE))
+                return;
+
+        for (y = y1; y < y2; y++) {
+                if (!term.dirty[y])
+                        continue;
+
+                term.dirty[y] = 0;
+
+                specs = term.specbuf;
+                numspecs = xmakeglyphfontspecs(specs, &term.line[y][x1], x2 - x1, x1, y);
+
+                i = ox = 0;
+                for (x = x1; x < x2 && i < numspecs; x++) {
+                        new = term.line[y][x];
+                        if (new.mode == ATTR_WDUMMY)
+                                continue;
+                        if (ena_sel && selected(x, y))
+                                new.mode ^= ATTR_REVERSE;
+                        if (i > 0 && ATTRCMP(base, new)) {
+                                xdrawglyphfontspecs(specs, base, i, ox, y);
+                                specs += i;
+                                numspecs -= i;
+                                i = 0;
+                        }
+                        if (i == 0) {
+                                ox = x;
+                                base = new;
+                        }
+                        i++;
+                }
+                if (i > 0)
+                        xdrawglyphfontspecs(specs, base, i, ox, y);
+        }
+        xdrawcursor();
+}
+
+void
+expose(XEvent *ev)
+{
+        redraw();
+}
+
+void
+visibility(XEvent *ev)
+{
+        XVisibilityEvent *e = &ev->xvisibility;
+
+        MODBIT(win.state, e->state != VisibilityFullyObscured, WIN_VISIBLE);
+}
+
+void
+unmap(XEvent *ev)
+{
+        win.state &= ~WIN_VISIBLE;
+}
+
+void
+xsetpointermotion(int set)
+{
+        MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
+        XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
+}
+
+void
+xseturgency(int add)
+{
+        XWMHints *h = XGetWMHints(xw.dpy, xw.win);
+
+        MODBIT(h->flags, add, XUrgencyHint);
+        XSetWMHints(xw.dpy, xw.win, h);
+        XFree(h);
+}
+
+void
+xbell(int vol)
+{
+        XkbBell(xw.dpy, xw.win, vol, (Atom)NULL);
+}
+
+unsigned long
+xwinid(void)
+{
+        return xw.win;
+}
+
+void
+focus(XEvent *ev)
+{
+        XFocusChangeEvent *e = &ev->xfocus;
+
+        if (e->mode == NotifyGrab)
+                return;
+
+        if (ev->type == FocusIn) {
+                XSetICFocus(xw.xic);
+                win.state |= WIN_FOCUSED;
+                xseturgency(0);
+                if (IS_SET(MODE_FOCUS))
+                        ttywrite("\033[I", 3);
+        } else {
+                XUnsetICFocus(xw.xic);
+                win.state &= ~WIN_FOCUSED;
+                if (IS_SET(MODE_FOCUS))
+                        ttywrite("\033[O", 3);
+        }
+}
+
+void
+kpress(XEvent *ev)
+{
+        XKeyEvent *e = &ev->xkey;
+        KeySym ksym;
+        char buf[32], *customkey;
+        int len;
+        Rune c;
+        Status status;
+        Shortcut *bp;
+
+        if (IS_SET(MODE_KBDLOCK))
+                return;
+
+        len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
+        /* 1. shortcuts */
+        for (bp = shortcuts; bp < shortcuts + shortcutslen; bp++) {
+                if (ksym == bp->keysym && match(bp->mod, e->state)) {
+                        bp->func(&(bp->arg));
+                        return;
+                }
+        }
+
+        /* 2. custom keys from config.h */
+        if ((customkey = kmap(ksym, e->state))) {
+                ttysend(customkey, strlen(customkey));
+                return;
+        }
+
+        /* 3. composed string from input method */
+        if (len == 0)
+                return;
+        if (len == 1 && e->state & Mod1Mask) {
+                if (IS_SET(MODE_8BIT)) {
+                        if (*buf < 0177) {
+                                c = *buf | 0x80;
+                                len = utf8encode(c, buf);
+                        }
+                } else {
+                        buf[1] = buf[0];
+                        buf[0] = '\033';
+                        len = 2;
+                }
+        }
+        ttysend(buf, len);
+}
+
+
+void
+cmessage(XEvent *e)
+{
+        /*
+         * See xembed specs
+         *  http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html
+         */
+        if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
+                if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
+                        win.state |= WIN_FOCUSED;
+                        xseturgency(0);
+                } else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
+                        win.state &= ~WIN_FOCUSED;
+                }
+        } else if (e->xclient.data.l[0] == xw.wmdeletewin) {
+                /* Send SIGHUP to shell */
+                kill(pid, SIGHUP);
+                exit(0);
+        }
+}
+
+void
+resize(XEvent *e)
+{
+        if (e->xconfigure.width == win.w && e->xconfigure.height == win.h)
+                return;
+
+        cresize(e->xconfigure.width, e->xconfigure.height);
+        ttyresize();
+}
+
+void
+run(void)
+{
+        XEvent ev;
+        int w = win.w, h = win.h;
+        fd_set rfd;
+        int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
+        struct timespec drawtimeout, *tv = NULL, now, last, lastblink;
+        long deltatime;
+
+        /* Waiting for window mapping */
+        do {
+                XNextEvent(xw.dpy, &ev);
+                /*
+                 * This XFilterEvent call is required because of XOpenIM. It
+                 * does filter out the key event and some client message for
+                 * the input method too.
+                 */
+                if (XFilterEvent(&ev, None))
+                        continue;
+                if (ev.type == ConfigureNotify) {
+                        w = ev.xconfigure.width;
+                        h = ev.xconfigure.height;
+                }
+        } while (ev.type != MapNotify);
+
+        cresize(w, h);
+        ttynew();
+        ttyresize();
+
+        clock_gettime(CLOCK_MONOTONIC, &last);
+        lastblink = last;
+
+        for (xev = actionfps;;) {
+                FD_ZERO(&rfd);
+                FD_SET(cmdfd, &rfd);
+                FD_SET(xfd, &rfd);
+
+                if (pselect(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv, NULL) < 0) {
+                        if (errno == EINTR)
+                                continue;
+                        die("select failed: %s\n", strerror(errno));
+                }
+                if (FD_ISSET(cmdfd, &rfd)) {
+                        ttyread();
+                        if (blinktimeout) {
+                                blinkset = tattrset(ATTR_BLINK);
+                                if (!blinkset)
+                                        MODBIT(term.mode, 0, MODE_BLINK);
+                        }
+                }
+
+                if (FD_ISSET(xfd, &rfd))
+                        xev = actionfps;
+
+                clock_gettime(CLOCK_MONOTONIC, &now);
+                drawtimeout.tv_sec = 0;
+                drawtimeout.tv_nsec =  (1000 * 1E6)/ xfps;
+                tv = &drawtimeout;
+
+                dodraw = 0;
+                if (blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
+                        tsetdirtattr(ATTR_BLINK);
+                        term.mode ^= MODE_BLINK;
+                        lastblink = now;
+                        dodraw = 1;
+                }
+                deltatime = TIMEDIFF(now, last);
+                if (deltatime > 1000 / (xev ? xfps : actionfps)) {
+                        dodraw = 1;
+                        last = now;
+                }
+
+                if (dodraw) {
+                        while (XPending(xw.dpy)) {
+                                XNextEvent(xw.dpy, &ev);
+                                if (XFilterEvent(&ev, None))
+                                        continue;
+                                if (handler[ev.type])
+                                        (handler[ev.type])(&ev);
+                        }
+
+                        draw();
+                        XFlush(xw.dpy);
+
+                        if (xev && !FD_ISSET(xfd, &rfd))
+                                xev--;
+                        if (!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
+                                if (blinkset) {
+                                        if (TIMEDIFF(now, lastblink) \
+                                                        > blinktimeout) {
+                                                drawtimeout.tv_nsec = 1000;
+                                        } else {
+                                                drawtimeout.tv_nsec = (1E6 * \
+                                                        (blinktimeout - \
+                                                        TIMEDIFF(now,
+                                                                lastblink)));
+                                        }
+                                        drawtimeout.tv_sec = \
+                                            drawtimeout.tv_nsec / 1E9;
+                                        drawtimeout.tv_nsec %= (long)1E9;
+                                } else {
+                                        tv = NULL;
+                                }
+                        }
+                }
+        }
+}
+
+int
+main(int argc, char *argv[])
+{
+        xw.l = xw.t = 0;
+        xw.isfixed = False;
+        win.cursor = cursorshape;
+
+        ARGBEGIN {
+        case 'a':
+                allowaltscreen = 0;
+                break;
+        case 'c':
+                opt_class = EARGF(usage());
+                break;
+        case 'e':
+                if (argc > 0)
+                        --argc, ++argv;
+                goto run;
+        case 'f':
+                opt_font = EARGF(usage());
+                break;
+        case 'g':
+                xw.gm = XParseGeometry(EARGF(usage()),
+                                &xw.l, &xw.t, &cols, &rows);
+                break;
+        case 'i':
+                xw.isfixed = 1;
+                break;
+        case 'o':
+                opt_io = EARGF(usage());
+                break;
+        case 'l':
+                opt_line = EARGF(usage());
+                break;
+        case 'n':
+                opt_name = EARGF(usage());
+                break;
+        case 't':
+        case 'T':
+                opt_title = EARGF(usage());
+                break;
+        case 'w':
+                opt_embed = EARGF(usage());
+                break;
+        case 'v':
+                die("%s " VERSION " (c) 2010-2016 st engineers\n", argv0);
+                break;
+        default:
+                usage();
+        } ARGEND;
+
+run:
+        if (argc > 0) {
+                /* eat all remaining arguments */
+                opt_cmd = argv;
+                if (!opt_title && !opt_line)
+                        opt_title = basename(xstrdup(argv[0]));
+        }
+        setlocale(LC_CTYPE, "");
+        XSetLocaleModifiers("");
+        tnew(MAX(cols, 1), MAX(rows, 1));
+        xinit();
+        selinit();
+        run();
+
+        return 0;
+}