sync updated drw code from dmenu

important:
- drw_rect: didn't use w and h, change the dwm code accordingly.
- drw_text: text is NULL is not allowed, use drw_rect().

1 files changed, 119 insertions, 132 deletions

diff --git a/drw.c b/drw.c
index eb3b3c3..f49200b 100644
--- a/drw.c
+++ b/drw.c
@@ -9,7 +9,7 @@
 #include "util.h"
 
 #define UTF_INVALID 0xFFFD
-#define UTF_SIZ 4
+#define UTF_SIZ     4
 
 static const unsigned char utfbyte[UTF_SIZ + 1] = {0x80,    0, 0xC0, 0xE0, 0xF0};
 static const unsigned char utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
@@ -17,50 +17,55 @@ static const long utfmin[UTF_SIZ + 1] = {       0,    0,  0x80,  0x800,  0x10000
 static const long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
 
 static long
-utf8decodebyte(const char c, size_t *i) {
-	for(*i = 0; *i < (UTF_SIZ + 1); ++(*i))
-		if(((unsigned char)c & utfmask[*i]) == utfbyte[*i])
+utf8decodebyte(const char c, size_t *i)
+{
+	for (*i = 0; *i < (UTF_SIZ + 1); ++(*i))
+		if (((unsigned char)c & utfmask[*i]) == utfbyte[*i])
 			return (unsigned char)c & ~utfmask[*i];
 	return 0;
 }
 
 static size_t
-utf8validate(long *u, size_t i) {
-	if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
+utf8validate(long *u, size_t i)
+{
+	if (!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
 		*u = UTF_INVALID;
-	for(i = 1; *u > utfmax[i]; ++i)
+	for (i = 1; *u > utfmax[i]; ++i)
 		;
 	return i;
 }
 
 static size_t
-utf8decode(const char *c, long *u, size_t clen) {
+utf8decode(const char *c, long *u, size_t clen)
+{
 	size_t i, j, len, type;
 	long udecoded;
 
 	*u = UTF_INVALID;
-	if(!clen)
+	if (!clen)
 		return 0;
 	udecoded = utf8decodebyte(c[0], &len);
-	if(!BETWEEN(len, 1, UTF_SIZ))
+	if (!BETWEEN(len, 1, UTF_SIZ))
 		return 1;
-	for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
+	for (i = 1, j = 1; i < clen && j < len; ++i, ++j) {
 		udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
-		if(type != 0)
+		if (type)
 			return j;
 	}
-	if(j < len)
+	if (j < len)
 		return 0;
 	*u = udecoded;
 	utf8validate(u, len);
+
 	return len;
 }
 
 Drw *
-drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h) {
-	Drw *drw = (Drw *)calloc(1, sizeof(Drw));
-	if(!drw)
-		return NULL;
+drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h)
+{
+	Drw *drw;
+
+	drw = ecalloc(1, sizeof(Drw));
 	drw->dpy = dpy;
 	drw->screen = screen;
 	drw->root = root;
@@ -70,26 +75,27 @@ drw_create(Display *dpy, int screen, Window root, unsigned int w, unsigned int h
 	drw->gc = XCreateGC(dpy, root, 0, NULL);
 	drw->fontcount = 0;
 	XSetLineAttributes(dpy, drw->gc, 1, LineSolid, CapButt, JoinMiter);
+
 	return drw;
 }
 
 void
-drw_resize(Drw *drw, unsigned int w, unsigned int h) {
-	if(!drw)
-		return;
+drw_resize(Drw *drw, unsigned int w, unsigned int h)
+{
 	drw->w = w;
 	drw->h = h;
-	if(drw->drawable != 0)
+	if (drw->drawable)
 		XFreePixmap(drw->dpy, drw->drawable);
 	drw->drawable = XCreatePixmap(drw->dpy, drw->root, w, h, DefaultDepth(drw->dpy, drw->screen));
 }
 
 void
-drw_free(Drw *drw) {
+drw_free(Drw *drw)
+{
 	size_t i;
-	for (i = 0; i < drw->fontcount; i++) {
+
+	for (i = 0; i < drw->fontcount; i++)
 		drw_font_free(drw->fonts[i]);
-	}
 	XFreePixmap(drw->dpy, drw->drawable);
 	XFreeGC(drw->dpy, drw->gc);
 	free(drw);
@@ -99,14 +105,11 @@ drw_free(Drw *drw) {
  * drw_font_create instead.
  */
 static Fnt *
-drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern) {
+drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern)
+{
 	Fnt *font;
-
-	if (!(fontname || fontpattern))
-		die("No font specified.\n");
-
-	if (!(font = (Fnt *)calloc(1, sizeof(Fnt))))
-		return NULL;
+	XftFont *xfont = NULL;
+	FcPattern *pattern = NULL;
 
 	if (fontname) {
 		/* Using the pattern found at font->xfont->pattern does not yield same
@@ -115,46 +118,50 @@ drw_font_xcreate(Drw *drw, const char *fontname, FcPattern *fontpattern) {
 		 * behaviour whereas the former just results in
 		 * missing-character-rectangles being drawn, at least with some fonts.
 		 */
-		if (!(font->xfont = XftFontOpenName(drw->dpy, drw->screen, fontname)) ||
-		    !(font->pattern = FcNameParse((FcChar8 *) fontname))) {
-			if (font->xfont) {
-				XftFontClose(drw->dpy, font->xfont);
-				font->xfont = NULL;
-			}
+		if (!(xfont = XftFontOpenName(drw->dpy, drw->screen, fontname))) {
 			fprintf(stderr, "error, cannot load font: '%s'\n", fontname);
+			return NULL;
+		}
+		if (!(pattern = FcNameParse((FcChar8 *) fontname))) {
+			fprintf(stderr, "error, cannot load font: '%s'\n", fontname);
+			XftFontClose(drw->dpy, xfont);
+			return NULL;
 		}
 	} else if (fontpattern) {
-		if (!(font->xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
+		if (!(xfont = XftFontOpenPattern(drw->dpy, fontpattern))) {
 			fprintf(stderr, "error, cannot load font pattern.\n");
-		} else {
-			font->pattern = NULL;
+			return NULL;
 		}
+	} else {
+		die("no font specified.\n");
 	}
 
-	if (!font->xfont) {
-		free(font);
-		return NULL;
-	}
-
-	font->ascent = font->xfont->ascent;
-	font->descent = font->xfont->descent;
+	font = ecalloc(1, sizeof(Fnt));
+	font->xfont = xfont;
+	font->pattern = pattern;
+	font->ascent = xfont->ascent;
+	font->descent = xfont->descent;
 	font->h = font->ascent + font->descent;
 	font->dpy = drw->dpy;
+
 	return font;
 }
 
 Fnt*
-drw_font_create(Drw *drw, const char *fontname) {
+drw_font_create(Drw *drw, const char *fontname)
+{
 	return drw_font_xcreate(drw, fontname, NULL);
 }
 
 void
-drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount) {
+drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount)
+{
 	size_t i;
 	Fnt *font;
+
 	for (i = 0; i < fontcount; i++) {
 		if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
-			die("Font cache exhausted.\n");
+			die("font cache exhausted.\n");
 		} else if ((font = drw_font_xcreate(drw, fonts[i], NULL))) {
 			drw->fonts[drw->fontcount++] = font;
 		}
@@ -162,68 +169,62 @@ drw_load_fonts(Drw* drw, const char *fonts[], size_t fontcount) {
 }
 
 void
-drw_font_free(Fnt *font) {
-	if(!font)
+drw_font_free(Fnt *font)
+{
+	if (!font)
 		return;
-	if(font->pattern)
+	if (font->pattern)
 		FcPatternDestroy(font->pattern);
 	XftFontClose(font->dpy, font->xfont);
 	free(font);
 }
 
 Clr *
-drw_clr_create(Drw *drw, const char *clrname) {
+drw_clr_create(Drw *drw, const char *clrname)
+{
 	Clr *clr;
-	Colormap cmap;
-	Visual *vis;
-
-	if(!drw)
-		return NULL;
-	clr = (Clr *)calloc(1, sizeof(Clr));
-	if(!clr)
-		return NULL;
-	cmap = DefaultColormap(drw->dpy, drw->screen);
-	vis = DefaultVisual(drw->dpy, drw->screen);
-	if(!XftColorAllocName(drw->dpy, vis, cmap, clrname, &clr->rgb))
+
+	clr = ecalloc(1, sizeof(Clr));
+	if (!XftColorAllocName(drw->dpy, DefaultVisual(drw->dpy, drw->screen),
+	                       DefaultColormap(drw->dpy, drw->screen),
+	                       clrname, &clr->rgb))
 		die("error, cannot allocate color '%s'\n", clrname);
 	clr->pix = clr->rgb.pixel;
+
 	return clr;
 }
 
 void
-drw_clr_free(Clr *clr) {
-	if(clr)
-		free(clr);
+drw_clr_free(Clr *clr)
+{
+	free(clr);
 }
 
 void
-drw_setscheme(Drw *drw, ClrScheme *scheme) {
-	if(drw && scheme)
-		drw->scheme = scheme;
+drw_setscheme(Drw *drw, ClrScheme *scheme)
+{
+	drw->scheme = scheme;
 }
 
 void
-drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert) {
-	int dx;
-
-	if(!drw || !drw->fontcount || !drw->scheme)
+drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, int filled, int empty, int invert)
+{
+	if (!drw->scheme)
 		return;
 	XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->bg->pix : drw->scheme->fg->pix);
-	dx = (drw->fonts[0]->ascent + drw->fonts[0]->descent + 2) / 4;
-	if(filled)
-		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x+1, y+1, dx+1, dx+1);
-	else if(empty)
-		XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x+1, y+1, dx, dx);
+	if (filled)
+		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w + 1, h + 1);
+	else if (empty)
+		XDrawRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
 }
 
 int
-drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert) {
+drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, int invert)
+{
 	char buf[1024];
 	int tx, ty, th;
 	Extnts tex;
-	Colormap cmap;
-	Visual *vis;
-	XftDraw *d;
+	XftDraw *d = NULL;
 	Fnt *curfont, *nextfont;
 	size_t i, len;
 	int utf8strlen, utf8charlen, render;
@@ -235,23 +236,18 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *tex
 	XftResult result;
 	int charexists = 0;
 
+	if (!drw->scheme || !drw->fontcount)
+		return 0;
+
 	if (!(render = x || y || w || h)) {
 		w = ~w;
-	}
-
-	if (!drw || !drw->scheme) {
-		return 0;
-	} else if (render) {
-		XSetForeground(drw->dpy, drw->gc, invert ? drw->scheme->fg->pix : drw->scheme->bg->pix);
+	} else {
+		XSetForeground(drw->dpy, drw->gc, invert ?
+		               drw->scheme->fg->pix : drw->scheme->bg->pix);
 		XFillRectangle(drw->dpy, drw->drawable, drw->gc, x, y, w, h);
-	}
-
-	if (!text || !drw->fontcount) {
-		return 0;
-	} else if (render) {
-		cmap = DefaultColormap(drw->dpy, drw->screen);
-		vis = DefaultVisual(drw->dpy, drw->screen);
-		d = XftDrawCreate(drw->dpy, drw->drawable, vis, cmap);
+		d = XftDrawCreate(drw->dpy, drw->drawable,
+		                  DefaultVisual(drw->dpy, drw->screen),
+		                  DefaultColormap(drw->dpy, drw->screen));
 	}
 
 	curfont = drw->fonts[0];
@@ -274,24 +270,23 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *tex
 				}
 			}
 
-			if (!charexists || (nextfont && nextfont != curfont)) {
+			if (!charexists || (nextfont && nextfont != curfont))
 				break;
-			} else {
+			else
 				charexists = 0;
-			}
 		}
 
 		if (utf8strlen) {
 			drw_font_getexts(curfont, utf8str, utf8strlen, &tex);
 			/* shorten text if necessary */
-			for(len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--)
+			for (len = MIN(utf8strlen, (sizeof buf) - 1); len && (tex.w > w - drw->fonts[0]->h || w < drw->fonts[0]->h); len--)
 				drw_font_getexts(curfont, utf8str, len, &tex);
 
 			if (len) {
 				memcpy(buf, utf8str, len);
 				buf[len] = '\0';
-				if(len < utf8strlen)
-					for(i = len; i && i > len - 3; buf[--i] = '.');
+				if (len < utf8strlen)
+					for (i = len; i && i > len - 3; buf[--i] = '.');
 
 				if (render) {
 					th = curfont->ascent + curfont->descent;
@@ -299,7 +294,6 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *tex
 					tx = x + (h / 2);
 					XftDrawStringUtf8(d, invert ? &drw->scheme->bg->rgb : &drw->scheme->fg->rgb, curfont->xfont, tx, ty, (XftChar8 *)buf, len);
 				}
-
 				x += tex.w;
 				w -= tex.w;
 			}
@@ -316,18 +310,16 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *tex
 			 */
 			charexists = 1;
 
-			if (drw->fontcount >= DRW_FONT_CACHE_SIZE) {
+			if (drw->fontcount >= DRW_FONT_CACHE_SIZE)
 				continue;
-			}
 
 			fccharset = FcCharSetCreate();
 			FcCharSetAddChar(fccharset, utf8codepoint);
 
 			if (!drw->fonts[0]->pattern) {
 				/* Refer to the comment in drw_font_xcreate for more
-				 * information.
-				 */
-				die("The first font in the cache must be loaded from a font string.\n");
+				 * information. */
+				die("the first font in the cache must be loaded from a font string.\n");
 			}
 
 			fcpattern = FcPatternDuplicate(drw->fonts[0]->pattern);
@@ -346,65 +338,60 @@ drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *tex
 				if (curfont && XftCharExists(drw->dpy, curfont->xfont, utf8codepoint)) {
 					drw->fonts[drw->fontcount++] = curfont;
 				} else {
-					if (curfont) {
-						drw_font_free(curfont);
-					}
+					drw_font_free(curfont);
 					curfont = drw->fonts[0];
 				}
 			}
 		}
 	}
-
-	if (render) {
+	if (d)
 		XftDrawDestroy(d);
-	}
 
 	return x;
 }
 
 void
-drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h) {
-	if(!drw)
-		return;
+drw_map(Drw *drw, Window win, int x, int y, unsigned int w, unsigned int h)
+{
 	XCopyArea(drw->dpy, drw->drawable, win, drw->gc, x, y, w, h, x, y);
 	XSync(drw->dpy, False);
 }
 
-
 void
-drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex) {
+drw_font_getexts(Fnt *font, const char *text, unsigned int len, Extnts *tex)
+{
 	XGlyphInfo ext;
 
-	if(!font || !text)
-		return;
 	XftTextExtentsUtf8(font->dpy, font->xfont, (XftChar8 *)text, len, &ext);
 	tex->h = font->h;
 	tex->w = ext.xOff;
 }
 
 unsigned int
-drw_font_getexts_width(Fnt *font, const char *text, unsigned int len) {
+drw_font_getexts_width(Fnt *font, const char *text, unsigned int len)
+{
 	Extnts tex;
 
-	if(!font)
-		return -1;
 	drw_font_getexts(font, text, len, &tex);
+
 	return tex.w;
 }
 
 Cur *
-drw_cur_create(Drw *drw, int shape) {
-	Cur *cur = (Cur *)calloc(1, sizeof(Cur));
+drw_cur_create(Drw *drw, int shape)
+{
+	Cur *cur;
 
-	if(!drw || !cur)
-		return NULL;
+	cur = ecalloc(1, sizeof(Cur));
 	cur->cursor = XCreateFontCursor(drw->dpy, shape);
+
 	return cur;
 }
 
 void
-drw_cur_free(Drw *drw, Cur *cursor) {
-	if(!drw || !cursor)
+drw_cur_free(Drw *drw, Cur *cursor)
+{
+	if (!cursor)
 		return;
 	XFreeCursor(drw->dpy, cursor->cursor);
 	free(cursor);