Improving some error messages

[xmenu] / xmenu.c

diff --git a/xmenu.c b/xmenu.c
index e624ac0..4407229 100644 (file)
--- a/xmenu.c
+++ b/xmenu.c
@@ -41,6 +41,7 @@ static struct Menu *parsestdin(void);
 
 /* text drawer, and its helper routine */
 static FcChar32 getnextutf8char(const char *s, const char **end_ret);
 
 /* text drawer, and its helper routine */
 static FcChar32 getnextutf8char(const char *s, const char **end_ret);

+static XftFont *getfontucode(FcChar32 ucode);

 static int drawtext(XftDraw *draw, XftColor *color, int x, int y, unsigned h, const char *text);
 
 /* structure setters, and their helper routines */
 static int drawtext(XftDraw *draw, XftColor *color, int x, int y, unsigned h, const char *text);
 
 /* structure setters, and their helper routines */


@@ -141,7 +142,7 @@ main(int argc, char *argv[])
 
        /* open connection to server and set X variables */
        if ((dpy = XOpenDisplay(NULL)) == NULL)
 
        /* open connection to server and set X variables */
        if ((dpy = XOpenDisplay(NULL)) == NULL)

-               errx(1, "cannot open display");
+               errx(1, "could not open display");

        screen = DefaultScreen(dpy);
        visual = DefaultVisual(dpy, screen);
        rootwin = RootWindow(dpy, screen);
        screen = DefaultScreen(dpy);
        visual = DefaultVisual(dpy, screen);
        rootwin = RootWindow(dpy, screen);


@@ -255,14 +256,18 @@ parsefonts(const char *s)
                i = 0;
                while (isspace(*p))
                        p++;
                i = 0;
                while (isspace(*p))
                        p++;

-               while (*p != '\0' && *p != ',') {
+               while (i < sizeof buf && *p != '\0' && *p != ',')

                        buf[i++] = *p++;
                        buf[i++] = *p++;

-               }
+               if (i >= sizeof buf)
+                       errx(1, "font name too long");

                if (*p == ',')
                        p++;
                buf[i] = '\0';
                if (*p == ',')
                        p++;
                buf[i] = '\0';

+               if (nfont == 0)
+                       if ((dc.pattern = FcNameParse((FcChar8 *)buf)) == NULL)
+                               errx(1, "the first font in the cache must be loaded from a font string");

                if ((dc.fonts[nfont++] = XftFontOpenName(dpy, screen, buf)) == NULL)
                if ((dc.fonts[nfont++] = XftFontOpenName(dpy, screen, buf)) == NULL)

-                       errx(1, "cannot load font");
+                       errx(1, "could not load font");

        }
 }
 
        }
 }
 


@@ -271,7 +276,7 @@ static void
 ealloccolor(const char *s, XftColor *color)
 {
        if(!XftColorAllocName(dpy, visual, colormap, s, color))
 ealloccolor(const char *s, XftColor *color)
 {
        if(!XftColorAllocName(dpy, visual, colormap, s, color))

-               errx(1, "cannot allocate color: %s", s);
+               errx(1, "could not allocate color: %s", s);

 }
 
 /* query monitor information and cursor position */
 }
 
 /* query monitor information and cursor position */


@@ -295,7 +300,7 @@ initmonitor(void)
        if ((info = XineramaQueryScreens(dpy, &nmons)) != NULL) {
                int selmon = 0;
 
        if ((info = XineramaQueryScreens(dpy, &nmons)) != NULL) {
                int selmon = 0;
 

-               if (!mflag || (mflag && (config.monitor < 0 || config.monitor >= nmons))) {
+               if (!mflag || config.monitor < 0 || config.monitor >= nmons) {

                        for (i = 0; i < nmons; i++) {
                                if (BETWEEN(cursx, info[i].x_org, info[i].x_org + info[i].width) &&
                                    BETWEEN(cursy, info[i].y_org, info[i].y_org + info[i].height)) {
                        for (i = 0; i < nmons; i++) {
                                if (BETWEEN(cursx, info[i].x_org, info[i].x_org + info[i].width) &&
                                    BETWEEN(cursy, info[i].y_org, info[i].y_org + info[i].height)) {


@@ -509,7 +514,7 @@ buildmenutree(unsigned level, const char *label, const char *output, char *file)
                          menu = menu->parent, i++)
                        ;
                if (menu == NULL)
                          menu = menu->parent, i++)
                        ;
                if (menu == NULL)

-                       errx(1, "reached NULL menu");
+                       errx(1, "improper indentation detected");

 
                /* find last item in the new menu */
                for (item = menu->list; item->next != NULL; item = item->next)
 
                /* find last item in the new menu */
                for (item = menu->list; item->next != NULL; item = item->next)


@@ -634,51 +639,87 @@ getnextutf8char(const char *s, const char **next_ret)
        return ucode;
 }
 
        return ucode;
 }
 

-/* draw text into XftDraw */
+/* get which font contains a given code point */
+static XftFont *
+getfontucode(FcChar32 ucode)
+{
+       FcCharSet *fccharset = NULL;
+       FcPattern *fcpattern = NULL;
+       FcPattern *match = NULL;
+       XftFont *retfont = NULL;
+       XftResult result;
+       size_t i;
+
+       for (i = 0; i < dc.nfonts; i++)
+               if (XftCharExists(dpy, dc.fonts[i], ucode) == FcTrue)
+                       return dc.fonts[i];
+
+       /* create a charset containing our code point */
+       fccharset = FcCharSetCreate();
+       FcCharSetAddChar(fccharset, ucode);
+
+       /* create a pattern akin to the dc.pattern but containing our charset */
+       if (fccharset) {
+               fcpattern = FcPatternDuplicate(dc.pattern);
+               FcPatternAddCharSet(fcpattern, FC_CHARSET, fccharset);
+       }
+
+       /* find pattern matching fcpattern */
+       if (fcpattern) {
+               FcConfigSubstitute(NULL, fcpattern, FcMatchPattern);
+               FcDefaultSubstitute(fcpattern);
+               match = XftFontMatch(dpy, screen, fcpattern, &result);
+       }
+
+       /* if found a pattern, open its font */
+       if (match) {
+               retfont = XftFontOpenPattern(dpy, match);
+               if (retfont && XftCharExists(dpy, retfont, ucode) == FcTrue) {
+                       if ((dc.fonts = realloc(dc.fonts, dc.nfonts+1)) == NULL)
+                               err(1, "realloc");
+                       dc.fonts[dc.nfonts] = retfont;
+                       return dc.fonts[dc.nfonts++];
+               } else {
+                       XftFontClose(dpy, retfont);
+               }
+       }
+
+       /* in case no fount was found, return the first one */
+       return dc.fonts[0];
+}
+
+/* draw text into XftDraw, return width of text glyphs */

 static int
 drawtext(XftDraw *draw, XftColor *color, int x, int y, unsigned h, const char *text)
 {
 static int
 drawtext(XftDraw *draw, XftColor *color, int x, int y, unsigned h, const char *text)
 {

-       const char *s, *nexts;
-       FcChar32 ucode;
-       XftFont *currfont;
-       int textlen = 0;
+       int textwidth = 0;

 
 

-       s = text;
-       while (*s) {
+       while (*text) {
+               XftFont *currfont;

                XGlyphInfo ext;
                XGlyphInfo ext;

-               int charexists;
+               FcChar32 ucode;
+               const char *next;

                size_t len;
                size_t len;

-               size_t i;

 
 

-               charexists = 0;
-               ucode = getnextutf8char(s, &nexts);
-               for (i = 0; i < dc.nfonts; i++) {
-                       charexists = XftCharExists(dpy, dc.fonts[i], ucode);
-                       if (charexists)
-                               break;
-               }
-               if (charexists)
-                       currfont = dc.fonts[i];
-
-               len = nexts - s;
+               ucode = getnextutf8char(text, &next);
+               currfont = getfontucode(ucode);

 
 

-               XftTextExtentsUtf8(dpy, currfont, (XftChar8 *)s,
-                                  len, &ext);
-               textlen += ext.xOff;
+               len = next - text;
+               XftTextExtentsUtf8(dpy, currfont, (XftChar8 *)text, len, &ext);
+               textwidth += ext.xOff;

 
                if (draw) {
                        int texty;
 
                        texty = y + (h - (currfont->ascent + currfont->descent))/2 + currfont->ascent;
 
                if (draw) {
                        int texty;
 
                        texty = y + (h - (currfont->ascent + currfont->descent))/2 + currfont->ascent;

-                       XftDrawStringUtf8(draw, color, currfont, x, texty,
-                                         (XftChar8 *)s, len);
+                       XftDrawStringUtf8(draw, color, currfont, x, texty, (XftChar8 *)text, len);

                        x += ext.xOff;
                }
 
                        x += ext.xOff;
                }
 

-               s = nexts;
+               text = next;

        }
 
        }
 

-       return textlen;
+       return textwidth;

 }
 
 /* setup the height, width and icon of the items of a menu */
 }
 
 /* setup the height, width and icon of the items of a menu */


@@ -823,7 +864,7 @@ grabpointer(void)
                        return;
                nanosleep(&ts, NULL);
        }
                        return;
                nanosleep(&ts, NULL);
        }

-       errx(1, "cannot grab keyboard");
+       errx(1, "could not grab pointer");

 }
 
 /* try to grab keyboard, we may have to wait for another process to ungrab */
 }
 
 /* try to grab keyboard, we may have to wait for another process to ungrab */


@@ -839,7 +880,7 @@ grabkeyboard(void)
                        return;
                nanosleep(&ts, NULL);
        }
                        return;
                nanosleep(&ts, NULL);
        }

-       errx(1, "cannot grab keyboard");
+       errx(1, "could not grab keyboard");

 }
 
 /* load and scale icon */
 }
 
 /* load and scale icon */


@@ -853,7 +894,7 @@ loadicon(const char *file)
 
        icon = imlib_load_image(file);
        if (icon == NULL)
 
        icon = imlib_load_image(file);
        if (icon == NULL)

-               errx(1, "cannot load icon %s", file);
+               errx(1, "could not load icon %s", file);

 
        imlib_context_set_image(icon);
 
 
        imlib_context_set_image(icon);
 


@@ -1249,6 +1290,8 @@ cleanmenu(struct Menu *menu)
 static void
 cleanup(void)
 {
 static void
 cleanup(void)
 {

+       size_t i;
+

        XUngrabPointer(dpy, CurrentTime);
        XUngrabKeyboard(dpy, CurrentTime);
 
        XUngrabPointer(dpy, CurrentTime);
        XUngrabKeyboard(dpy, CurrentTime);
 


@@ -1259,6 +1302,9 @@ cleanup(void)
        XftColorFree(dpy, visual, colormap, &dc.separator);
        XftColorFree(dpy, visual, colormap, &dc.border);
 
        XftColorFree(dpy, visual, colormap, &dc.separator);
        XftColorFree(dpy, visual, colormap, &dc.border);
 

+       for (i = 0; i < dc.nfonts; i++)
+               XftFontClose(dpy, dc.fonts[i]);
+

        XFreeGC(dpy, dc.gc);
        XCloseDisplay(dpy);
 }
        XFreeGC(dpy, dc.gc);
        XCloseDisplay(dpy);
 }