3 files changed, 128 insertions, 76 deletions

diff --git a/config.def.h b/config.def.h
index 5c4c518..67b1316 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1,4 +1,8 @@
 
+/*
+ * Do not include the »pixelsize« parameter in your font definition. It is
+ * used to calculate zooming.
+ */
 #define FONT "Liberation Mono:pixelsize=12:antialias=false:autohint=false"
 
 /* Space in pixels around the terminal buffer */
@@ -73,6 +77,15 @@ static Key key[] = {
         { XK_F12,       XK_NO_MOD, "\033[24~" },
 };
 
+/* Internal shortcuts. */
+#define MODKEY Mod1Mask
+
+static Shortcut shortcuts[] = {
+        /* modifier             key             function        argument */
+        { MODKEY|ShiftMask,     XK_Prior,       xzoom,          {.i = +1} },
+        { MODKEY|ShiftMask,     XK_Next,        xzoom,          {.i = -1} },
+};
+
 /* Set TERM to this */
 #define TNAME "st-256color"
 
@@ -81,3 +94,4 @@ static Key key[] = {
 #define TRIPLECLICK_TIMEOUT (2*DOUBLECLICK_TIMEOUT)
 
 #define TAB 8
+
diff --git a/config.mk b/config.mk
index 3cd714f..e45fc2d 100644
--- a/config.mk
+++ b/config.mk
@@ -16,8 +16,8 @@ LIBS = -L/usr/lib -lc -L${X11LIB} -lX11 -lutil -lXext -lXft -lfontconfig
 
 # flags
 CPPFLAGS = -DVERSION=\"${VERSION}\"
-CFLAGS += -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
-LDFLAGS += -s ${LIBS}
+CFLAGS += -g -std=c99 -pedantic -Wall -Os ${INCS} ${CPPFLAGS}
+LDFLAGS += -g ${LIBS}
 
 # compiler and linker
 CC ?= cc
diff --git a/st.c b/st.c
index f54e4d5..5703e96 100644
--- a/st.c
+++ b/st.c
@@ -60,6 +60,8 @@
 
 #define REDRAW_TIMEOUT (80*1000) /* 80 ms */
 
+/* macros */
+#define CLEANMASK(mask) (mask & (ShiftMask|ControlMask|Mod1Mask|Mod2Mask|Mod3Mask|Mod4Mask|Mod5Mask))
 #define SERRNO strerror(errno)
 #define MIN(a, b)  ((a) < (b) ? (a) : (b))
 #define MAX(a, b)  ((a) < (b) ? (b) : (a))
@@ -238,6 +240,24 @@ typedef struct {
         struct timeval tclick2;
 } Selection;
 
+typedef union {
+        int i;
+        unsigned int ui;
+        float f;
+        const void *v;
+} Arg;
+
+typedef struct {
+        unsigned int mod;
+        KeySym keysym;
+        void (*func)(const Arg *);
+        const Arg arg;
+} Shortcut;
+
+/* function definitions used in config.h */
+static void xzoom(const Arg *);
+
+/* Config.h for applying patches and the configuration. */
 #include "config.h"
 
 /* Font structure */
@@ -321,6 +341,7 @@ static void unmap(XEvent *);
 static char *kmap(KeySym, uint);
 static void kpress(XEvent *);
 static void cmessage(XEvent *);
+static void cresize(int width, int height);
 static void resize(XEvent *);
 static void focus(XEvent *);
 static void brelease(XEvent *);
@@ -345,7 +366,6 @@ static ssize_t xwrite(int, char *, size_t);
 static void *xmalloc(size_t);
 static void *xrealloc(void *, size_t);
 static void *xcalloc(size_t nmemb, size_t size);
-static char *smstrcat(char *, ...);
 
 static void (*handler[LASTEvent])(XEvent *) = {
         [KeyPress] = kpress,
@@ -381,6 +401,8 @@ static char *opt_embed = NULL;
 static char *opt_class = NULL;
 static char *opt_font = NULL;
 
+static char *usedfont = NULL;
+static int usedfontsize = 0;
 
 ssize_t
 xwrite(int fd, char *s, size_t len) {
@@ -424,44 +446,6 @@ xcalloc(size_t nmemb, size_t size) {
         return p;
 }
 
-char *
-smstrcat(char *src, ...)
-{
-        va_list fmtargs;
-        char *ret, *p, *v;
-        int len, slen, flen;
-
-        len = slen = strlen(src);
-
-        va_start(fmtargs, src);
-        for(;;) {
-                v = va_arg(fmtargs, char *);
-                if(v == NULL)
-                        break;
-                len += strlen(v);
-        }
-        va_end(fmtargs);
-
-        p = ret = xmalloc(len+1);
-        memmove(p, src, slen);
-        p += slen;
-
-        va_start(fmtargs, src);
-        for(;;) {
-                v = va_arg(fmtargs, char *);
-                if(v == NULL)
-                        break;
-                flen = strlen(v);
-                memmove(p, v, flen);
-                p += flen;
-        }
-        va_end(fmtargs);
-
-        ret[len] = '\0';
-
-        return ret;
-}
-
 int
 utf8decode(char *s, long *u) {
         uchar c;
@@ -2107,7 +2091,8 @@ tresize(int col, int row) {
                         *bp = 1;
         }
         /* update terminal size */
-        term.col = col, term.row = row;
+        term.col = col;
+        term.row = row;
         /* make use of the LIMIT in tmoveto */
         tmoveto(term.c.x, term.c.y);
         /* reset scrolling region */
@@ -2207,22 +2192,17 @@ xhints(void) {
         XFree(sizeh);
 }
 
-void
-xinitfont(Font *f, char *fontstr) {
-        FcPattern *pattern, *match;
+int
+xloadfont(Font *f, FcPattern *pattern) {
+        FcPattern *match;
         FcResult result;
 
-        pattern = FcNameParse((FcChar8 *)fontstr);
-        if(!pattern)
-                die("st: can't open font %s\n", fontstr);
-
         match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
-        FcPatternDestroy(pattern);
         if(!match)
-                die("st: can't open font %s\n", fontstr);
+                return 1;
         if(!(f->xft_set = XftFontOpenPattern(xw.dpy, match))) {
                 FcPatternDestroy(match);
-                die("st: can't open font %s.\n", fontstr);
+                return 1;
         }
 
         f->ascent = f->xft_set->ascent;
@@ -2232,27 +2212,68 @@ xinitfont(Font *f, char *fontstr) {
 
         f->height = f->xft_set->height;
         f->width = f->lbearing + f->rbearing;
+
+        return 0;
 }
 
 void
-initfonts(char *fontstr) {
-        char *fstr;
+xloadfonts(char *fontstr, int fontsize) {
+        FcPattern *pattern;
+        FcResult result;
+        double fontval;
+
+        pattern = FcNameParse((FcChar8 *)fontstr);
+        if(!pattern)
+                die("st: can't open font %s\n", fontstr);
+
+        if(fontsize > 0) {
+                FcPatternDel(pattern, FC_PIXEL_SIZE);
+                FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
+                usedfontsize = fontsize;
+        } else {
+                result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
+                if(result == FcResultMatch) {
+                        usedfontsize = (int)fontval;
+                } 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;
+                }
+        }
 
-        xinitfont(&dc.font, fontstr);
+        if(xloadfont(&dc.font, pattern))
+                die("st: can't open font %s\n", fontstr);
+
+        /* Setting character width and height. */
         xw.cw = dc.font.width;
         xw.ch = dc.font.height;
 
-        fstr = smstrcat(fontstr, ":weight=bold", NULL);
-        xinitfont(&dc.bfont, fstr);
-        free(fstr);
+        FcPatternDel(pattern, FC_WEIGHT);
+        FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
+        if(xloadfont(&dc.bfont, pattern))
+                die("st: can't open font %s\n", fontstr);
 
-        fstr = smstrcat(fontstr, ":slant=italic,oblique", NULL);
-        xinitfont(&dc.ifont, fstr);
-        free(fstr);
+        FcPatternDel(pattern, FC_SLANT);
+        FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
+        if(xloadfont(&dc.ibfont, pattern))
+                die("st: can't open font %s\n", fontstr);
 
-        fstr = smstrcat(fontstr, ":weight=bold:slant=italic,oblique", NULL);
-        xinitfont(&dc.ibfont, fstr);
-        free(fstr);
+        FcPatternDel(pattern, FC_WEIGHT);
+        if(xloadfont(&dc.ifont, pattern))
+                die("st: can't open font %s\n", fontstr);
+
+        FcPatternDestroy(pattern);
+}
+
+void
+xzoom(const Arg *arg)
+{
+        xloadfonts(usedfont, usedfontsize + arg->i);
+        cresize(0, 0);
+        draw();
 }
 
 void
@@ -2268,7 +2289,8 @@ xinit(void) {
         xw.vis = XDefaultVisual(xw.dpy, xw.scr);
 
         /* font */
-        initfonts((opt_font != NULL)? opt_font : FONT);
+        usedfont = (opt_font == NULL)? FONT : opt_font;
+        xloadfonts(usedfont, 0);
 
         /* colors */
         xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
@@ -2604,11 +2626,8 @@ void
 kpress(XEvent *ev) {
         XKeyEvent *e = &ev->xkey;
         KeySym ksym;
-        char buf[32];
-        char *customkey;
-        int len;
-        int meta;
-        int shift;
+        char buf[32], *customkey;
+        int len, meta, shift, i;
         Status status;
 
         if (IS_SET(MODE_KBDLOCK))
@@ -2618,7 +2637,17 @@ kpress(XEvent *ev) {
         shift = e->state & ShiftMask;
         len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
 
-        /* 1. custom keys from config.h */
+        /* 1. shortcuts */
+        for(i = 0; i < LEN(shortcuts); i++) {
+                if((ksym == shortcuts[i].keysym)
+                                && (CLEANMASK(shortcuts[i].mod) == \
+                                        CLEANMASK(e->state))
+                                && shortcuts[i].func) {
+                        shortcuts[i].func(&(shortcuts[i].arg));
+                }
+        }
+
+        /* 2. custom keys from config.h */
         if((customkey = kmap(ksym, e->state))) {
                 ttywrite(customkey, strlen(customkey));
         /* 2. hardcoded (overrides X lookup) */
@@ -2676,14 +2705,15 @@ cmessage(XEvent *e) {
 }
 
 void
-resize(XEvent *e) {
+cresize(int width, int height)
+{
         int col, row;
 
-        if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
-                return;
+        if(width != 0)
+                xw.w = width;
+        if(height != 0)
+                xw.h = height;
 
-        xw.w = e->xconfigure.width;
-        xw.h = e->xconfigure.height;
         col = (xw.w - 2*BORDER) / xw.cw;
         row = (xw.h - 2*BORDER) / xw.ch;
         if(col == term.col && row == term.row)
@@ -2695,6 +2725,14 @@ resize(XEvent *e) {
 }
 
 void
+resize(XEvent *e) {
+        if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
+                return;
+
+        cresize(e->xconfigure.width, e->xconfigure.height);
+}
+
+void
 run(void) {
         XEvent ev;
         fd_set rfd;