Implement italic font support.

4 files changed, 32 insertions, 19 deletions

diff --git a/TODO b/TODO
index 84025ae..c77c105 100644
--- a/TODO
+++ b/TODO
@@ -4,7 +4,6 @@ vt emulation
 * implement BCE right
 * color definition in CSI
         * implement CSI parsing
-* implement real italic
 * make the keypad keys really work
         * kf0 .. kf44
         * kend, kel, kent, kfnd, ked, kext
diff --git a/config.def.h b/config.def.h
index 047b5d1..0aef8be 100644
--- a/config.def.h
+++ b/config.def.h
@@ -1,6 +1,8 @@
 
 #define FONT "-*-*-medium-r-*-*-*-120-75-75-*-60-*-*"
 #define BOLDFONT "-*-*-bold-r-*-*-*-120-75-75-*-60-*-*"
+/* If italic is not availbel, fall back to bold. */
+#define ITALICFONT "-*-*-medium-o-*-*-*-120-75-75-*-60-*-*," BOLDFONT
 
 /* Space in pixels around the terminal buffer */
 #define BORDER 2
@@ -29,9 +31,9 @@ static const char *colorname[] = {
         "magenta",
         "cyan",
         "white",
-        
+
         [255] = 0,
-        
+
         /* more colors can be added after 255 to use with DefaultXX */
         "#cccccc",
         "#333333",
@@ -50,11 +52,11 @@ static const char *colorname[] = {
    Mask value:
    * Use XK_ANY_MOD to match the key no matter modifiers state
    * Use XK_NO_MOD to match the key alone (no modifiers)
-   
+
       key,        mask,  output */
 static Key key[] = {
         { XK_BackSpace, XK_NO_MOD, "\177" },
-        { XK_Insert,    XK_NO_MOD, "\033[2~" },
+        { XK_Insert,    XK_NO_MOD, "\033[2~" },
         { XK_Delete,    XK_NO_MOD, "\033[3~" },
         { XK_Home,      XK_NO_MOD, "\033[1~" },
         { XK_End,       XK_NO_MOD, "\033[4~" },
diff --git a/st.c b/st.c
index cf329fd..655d5a3 100644
--- a/st.c
+++ b/st.c
@@ -76,6 +76,7 @@ enum glyph_attribute {
         ATTR_UNDERLINE = 2,
         ATTR_BOLD      = 4,
         ATTR_GFX       = 8,
+        ATTR_ITALIC    = 16,
 };
 
 enum cursor_movement {
@@ -238,7 +239,7 @@ typedef struct {
                 short lbearing;
                 short rbearing;
                 XFontSet set;
-        } font, bfont;
+        } font, bfont, ifont;
 } DC;
 
 static void die(const char*, ...);
@@ -1122,8 +1123,8 @@ tsetattr(int *attr, int l) {
                 case 1:
                         term.c.attr.mode |= ATTR_BOLD;
                         break;
-                case 3: /* enter standout (highlight) mode TODO: make it italic */
-                        term.c.attr.mode |= ATTR_REVERSE;
+                case 3: /* enter standout (highlight) */
+                        term.c.attr.mode |= ATTR_ITALIC;
                         break;
                 case 4:
                         term.c.attr.mode |= ATTR_UNDERLINE;
@@ -1134,8 +1135,8 @@ tsetattr(int *attr, int l) {
                 case 22:
                         term.c.attr.mode &= ~ATTR_BOLD;
                         break;
-                case 23: /* leave standout (highlight) mode TODO: make it italic */
-                        term.c.attr.mode &= ~ATTR_REVERSE;
+                case 23: /* leave standout (highlight) mode */
+                        term.c.attr.mode &= ~ATTR_ITALIC;
                         break;
                 case 24:
                         term.c.attr.mode &= ~ATTR_UNDERLINE;
@@ -1886,14 +1887,20 @@ xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rb
 }
 
 void
-initfonts(char *fontstr, char *bfontstr) {
-        if((dc.font.set = xinitfont(fontstr)) == NULL ||
-           (dc.bfont.set = xinitfont(bfontstr)) == NULL)
-                die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
+initfonts(char *fontstr, char *bfontstr, char *ifontstr) {
+        if((dc.font.set = xinitfont(fontstr)) == NULL)
+                die("Can't load font %s\n", fontstr);
+        if((dc.bfont.set = xinitfont(bfontstr)) == NULL)
+                die("Can't load bfont %s\n", bfontstr);
+        if((dc.ifont.set = xinitfont(ifontstr)) == NULL)
+                die("Can't load ifont %s\n", ifontstr);
+
         xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
             &dc.font.lbearing, &dc.font.rbearing);
         xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
             &dc.bfont.lbearing, &dc.bfont.rbearing);
+        xgetfontinfo(dc.ifont.set, &dc.ifont.ascent, &dc.ifont.descent,
+            &dc.ifont.lbearing, &dc.ifont.rbearing);
 }
 
 void
@@ -1927,7 +1934,7 @@ xinit(void) {
         }
 
         /* font */
-        initfonts(FONT, BOLDFONT);
+        initfonts(FONT, BOLDFONT, ITALICFONT);
 
         /* XXX: Assuming same size for bold font */
         xw.cw = dc.font.rbearing - dc.font.lbearing;
@@ -2002,6 +2009,9 @@ xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
                 fontset = dc.bfont.set;
         }
 
+        if(base.mode & ATTR_ITALIC)
+                fontset = dc.ifont.set;
+
         XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
         XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
 
diff --git a/st.info b/st.info
index aaae099..38012d8 100644
--- a/st.info
+++ b/st.info
@@ -83,15 +83,16 @@ st| simpleterm,
         op=\E[39;49m,
         pairs#64,
         rc=\E8,
-        rs1=\Ec,
-        rs2=\E[4l\E>,
         rev=\E[7m,
         ri=\EM,
+        ritm=\E[23m,
         rmacs=\E(B,
         rmcup=\E[?1049l,
-        rmkx=\E>,
+#       rmkx=\E>,
         rmso=\E[23m,
         rmul=\E[m,
+        rs1=\Ec,
+        rs2=\E[4l\E>,
         sc=\E7,
         setab=\E[4%p1%dm,
         setaf=\E[3%p1%dm,
@@ -99,9 +100,10 @@ st| simpleterm,
         setf=\E[3%?%p1%{1}%=%t4%e%p1%{3}%=%t6%e%p1%{4}%=%t1%e%p1%{6}%=%t3%e%p1%d%;m,
         sgr0=\E[0m,
         sgr=%?%p9%t\E(0%e\E(B%;\E[0%?%p6%t;1%;%?%p2%t;4%;%?%p1%p3%|%t;7%;%?%p4%t;5%;%?%p7%t;8%;m,
+        sitm=\E[3m,
         smacs=\E(0,
         smcup=\E[?1049h,
-        smkx=\E=,
+#       smkx=\E=,
         smso=\E[3m,
         smul=\E[4m,
         tbc=\E[3g,