From 96c65400ccdcb76cf20ec7721920f944e6b490ec Mon Sep 17 00:00:00 2001
From: Connor Lane Smith
Date: Thu, 24 Jun 2010 16:18:18 +0100
Subject: decoupled draw.c from dmenu & dinput

---
 dinput.c |  40 ++++++++++++-----------
 dmenu.c  |  49 ++++++++++++++--------------
 draw.c   | 109 +++++++++++++++++++++++++++++++--------------------------------
 draw.h   |  30 ++++++------------
 4 files changed, 111 insertions(+), 117 deletions(-)

diff --git a/dinput.c b/dinput.c
index 15f5e26..39889b3 100644
--- a/dinput.c
+++ b/dinput.c
@@ -38,20 +38,18 @@ static char *prompt = NULL;
 static char text[4096];
 static int promptw = 0;
 static int ret = 0;
+static int screen;
 static unsigned int cursor = 0;
 static unsigned int numlockmask = 0;
+static unsigned int mw, mh;
 static Bool running = True;
-static Window win;
-
-Display *dpy;
-DC dc;
-int screen;
-unsigned int mw, mh;
-Window parent;
+static DC dc;
+static Display *dpy;
+static Window win, parent;
 
 void
 cleanup(void) {
-	drawcleanup();
+	cleanupdraw(&dc);
 	XDestroyWindow(dpy, win);
 	XUngrabKeyboard(dpy, CurrentTime);
 }
@@ -60,7 +58,7 @@ void
 drawcursor(void) {
 	XRectangle r = { dc.x, dc.y + 2, 1, dc.font.height - 2 };
 
-	r.x += textnw(text, cursor) + dc.font.height / 2;
+	r.x += textnw(&dc, text, cursor) + dc.font.height / 2;
 
 	XSetForeground(dpy, dc.gc, dc.norm[ColFG]);
 	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
@@ -73,15 +71,15 @@ drawinput(void)
 	dc.y = 0;
 	dc.w = mw;
 	dc.h = mh;
-	drawtext(NULL, dc.norm);
+	drawtext(&dc, NULL, dc.norm);
 	/* print prompt? */
 	if(prompt) {
 		dc.w = promptw;
-		drawtext(prompt, dc.sel);
+		drawtext(&dc, prompt, dc.sel);
 		dc.x += dc.w;
 	}
 	dc.w = mw - dc.x;
-	drawtext(*text ? text : NULL, dc.norm);
+	drawtext(&dc, *text ? text : NULL, dc.norm);
 	drawcursor();
 	XCopyArea(dpy, dc.drawable, win, dc.gc, 0, 0, mw, mh, 0, 0);
 	XFlush(dpy);
@@ -269,15 +267,21 @@ setup(Bool topbar) {
 		}
 	XFreeModifiermap(modmap);
 
-	initfont(font);
+	dc.dpy = dpy;
+	dc.norm[ColBG] = getcolor(&dc, normbgcolor);
+	dc.norm[ColFG] = getcolor(&dc, normfgcolor);
+	dc.sel[ColBG] = getcolor(&dc, selbgcolor);
+	dc.sel[ColFG] = getcolor(&dc, selfgcolor);
+	initfont(&dc, font);
+	fprintf(stderr, "dc.font.xfont: %u\n", (size_t)dc.font.xfont);
 
-	/* menu window */
+	/* input window */
 	wa.override_redirect = True;
 	wa.background_pixmap = ParentRelative;
 	wa.event_mask = ExposureMask | ButtonPressMask | KeyPressMask | VisibilityChangeMask;
 
-	/* menu window geometry */
-	mh = (dc.font.height + 2);
+	/* input window geometry */
+	mh = dc.font.height + 2;
 #if XINERAMA
 	if(parent == RootWindow(dpy, screen) && XineramaIsActive(dpy) && (info = XineramaQueryScreens(dpy, &n))) {
 		i = 0;
@@ -309,9 +313,9 @@ setup(Bool topbar) {
 			DefaultVisual(dpy, screen),
 			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 
-	drawsetup();
+	setupdraw(&dc, win);
 	if(prompt)
-		promptw = MIN(textw(prompt), mw / 5);
+		promptw = MIN(textw(&dc, prompt), mw / 5);
 	cursor = strlen(text);
 	XMapRaised(dpy, win);
 }
diff --git a/dmenu.c b/dmenu.c
index 878bc95..0b42073 100644
--- a/dmenu.c
+++ b/dmenu.c
@@ -55,26 +55,24 @@ static char text[4096];
 static int cmdw = 0;
 static int promptw = 0;
 static int ret = 0;
+static int screen;
 static unsigned int lines = 0;
 static unsigned int numlockmask = 0;
+static unsigned int mw, mh;
 static Bool running = True;
+static DC dc;
+static Display *dpy;
 static Item *allitems = NULL;  /* first of all items */
 static Item *item = NULL;      /* first of pattern matching items */
 static Item *sel = NULL;
 static Item *next = NULL;
 static Item *prev = NULL;
 static Item *curr = NULL;
-static Window win;
+static Window win, parent;
 static int (*fstrncmp)(const char *, const char *, size_t) = strncmp;
 static char *(*fstrstr)(const char *, const char *) = strstr;
 static void (*calcoffsets)(void) = calcoffsetsh;
 
-Display *dpy;
-DC dc;
-int screen;
-unsigned int mw, mh;
-Window parent;
-
 void
 appenditem(Item *i, Item **list, Item **last) {
 	if(!(*last))
@@ -92,11 +90,11 @@ calcoffsetsh(void) {
 
 	w = promptw + cmdw + (2 * spaceitem);
 	for(next = curr; next; next = next->right)
-		if((w += MIN(textw(next->text), mw / 3)) > mw)
+		if((w += MIN(textw(&dc, next->text), mw / 3)) > mw)
 			break;
 	w = promptw + cmdw + (2 * spaceitem);
 	for(prev = curr; prev && prev->left; prev = prev->left)
-		if((w += MIN(textw(prev->left->text), mw / 3)) > mw)
+		if((w += MIN(textw(&dc, prev->left->text), mw / 3)) > mw)
 			break;
 }
 
@@ -143,7 +141,7 @@ cleanup(void) {
 		free(allitems);
 		allitems = itm;
 	}
-	drawcleanup();
+	cleanupdraw(&dc);
 	XDestroyWindow(dpy, win);
 	XUngrabKeyboard(dpy, CurrentTime);
 }
@@ -161,18 +159,18 @@ drawmenu(void) {
 	dc.y = 0;
 	dc.w = mw;
 	dc.h = mh;
-	drawtext(NULL, dc.norm);
+	drawtext(&dc, NULL, dc.norm);
 	/* print prompt? */
 	if(prompt) {
 		dc.w = promptw;
-		drawtext(prompt, dc.sel);
+		drawtext(&dc, prompt, dc.sel);
 		dc.x += dc.w;
 	}
 	dc.w = mw - dc.x;
 	/* print command */
 	if(cmdw && item && lines == 0)
 		dc.w = cmdw;
-	drawtext(*text ? text : NULL, dc.norm);
+	drawtext(&dc, *text ? text : NULL, dc.norm);
 	if(curr) {
 		if(lines > 0)
 			drawmenuv();
@@ -189,16 +187,16 @@ drawmenuh(void) {
 
 	dc.x += cmdw;
 	dc.w = spaceitem;
-	drawtext(curr->left ? "<" : NULL, dc.norm);
+	drawtext(&dc, curr->left ? "<" : NULL, dc.norm);
 	dc.x += dc.w;
 	for(i = curr; i != next; i=i->right) {
-		dc.w = MIN(textw(i->text), mw / 3);
-		drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
+		dc.w = MIN(textw(&dc, i->text), mw / 3);
+		drawtext(&dc, i->text, (sel == i) ? dc.sel : dc.norm);
 		dc.x += dc.w;
 	}
 	dc.w = spaceitem;
 	dc.x = mw - dc.w;
-	drawtext(next ? ">" : NULL, dc.norm);
+	drawtext(&dc, next ? ">" : NULL, dc.norm);
 }
 
 void
@@ -209,11 +207,11 @@ drawmenuv(void) {
 	dc.h = dc.font.height + 2;
 	dc.y = dc.h;
 	for(i = curr; i != next; i=i->right) {
-		drawtext(i->text, (sel == i) ? dc.sel : dc.norm);
+		drawtext(&dc, i->text, (sel == i) ? dc.sel : dc.norm);
 		dc.y += dc.h;
 	}
 	dc.h = mh - dc.y;
-	drawtext(NULL, dc.norm);
+	drawtext(&dc, NULL, dc.norm);
 }
 
 Bool
@@ -491,7 +489,12 @@ setup(Bool topbar) {
 		}
 	XFreeModifiermap(modmap);
 
-	initfont(font);
+	dc.dpy = dpy;
+	dc.norm[ColBG] = getcolor(&dc, normbgcolor);
+	dc.norm[ColFG] = getcolor(&dc, normfgcolor);
+	dc.sel[ColBG] = getcolor(&dc, selbgcolor);
+	dc.sel[ColFG] = getcolor(&dc, selfgcolor);
+	initfont(&dc, font);
 
 	/* menu window */
 	wa.override_redirect = True;
@@ -531,11 +534,11 @@ setup(Bool topbar) {
 			DefaultVisual(dpy, screen),
 			CWOverrideRedirect | CWBackPixmap | CWEventMask, &wa);
 
-	drawsetup();
+	setupdraw(&dc, win);
 	if(maxname)
-		cmdw = MIN(textw(maxname), mw / 3);
+		cmdw = MIN(textw(&dc, maxname), mw / 3);
 	if(prompt)
-		promptw = MIN(textw(prompt), mw / 5);
+		promptw = MIN(textw(&dc, prompt), mw / 5);
 	text[0] = '\0';
 	match(text);
 	XMapRaised(dpy, win);
diff --git a/draw.c b/draw.c
index 6791b97..9142905 100644
--- a/draw.c
+++ b/draw.c
@@ -14,126 +14,123 @@
 #define MAX(a, b)               ((a) > (b) ? (a) : (b))
 
 /* variables */
-char *progname;
+const char *progname;
 
 void
-drawcleanup(void) {
-	if(dc.font.set)
-		XFreeFontSet(dpy, dc.font.set);
+cleanupdraw(DC *dc) {
+	if(dc->font.set)
+		XFreeFontSet(dc->dpy, dc->font.set);
 	else
-		XFreeFont(dpy, dc.font.xfont);
-	XFreePixmap(dpy, dc.drawable);
-	XFreeGC(dpy, dc.gc);
+		XFreeFont(dc->dpy, dc->font.xfont);
+	XFreePixmap(dc->dpy, dc->drawable);
+	XFreeGC(dc->dpy, dc->gc);
 }
 
 void
-drawsetup(void) {
-	/* style */
-	dc.norm[ColBG] = getcolor(normbgcolor);
-	dc.norm[ColFG] = getcolor(normfgcolor);
-	dc.sel[ColBG] = getcolor(selbgcolor);
-	dc.sel[ColFG] = getcolor(selfgcolor);
-
-	/* pixmap */
-	dc.drawable = XCreatePixmap(dpy, parent, mw, mh, DefaultDepth(dpy, screen));
-	dc.gc = XCreateGC(dpy, parent, 0, NULL);
-	XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
-	if(!dc.font.set)
-		XSetFont(dpy, dc.gc, dc.font.xfont->fid);
+setupdraw(DC *dc, Window w) {
+	XWindowAttributes wa;
+
+	XGetWindowAttributes(dc->dpy, w, &wa);
+	dc->drawable = XCreatePixmap(dc->dpy, w, wa.width, wa.height,
+		DefaultDepth(dc->dpy, DefaultScreen(dc->dpy)));
+	dc->gc = XCreateGC(dc->dpy, w, 0, NULL);
+	XSetLineAttributes(dc->dpy, dc->gc, 1, LineSolid, CapButt, JoinMiter);
+	if(!dc->font.set)
+		XSetFont(dc->dpy, dc->gc, dc->font.xfont->fid);
 }
 
 void
-drawtext(const char *text, unsigned long col[ColLast]) {
+drawtext(DC *dc, const char *text, unsigned long col[ColLast]) {
 	char buf[256];
 	int i, x, y, h, len, olen;
-	XRectangle r = { dc.x, dc.y, dc.w, dc.h };
+	XRectangle r = { dc->x, dc->y, dc->w, dc->h };
 
-	XSetForeground(dpy, dc.gc, col[ColBG]);
-	XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
+	XSetForeground(dc->dpy, dc->gc, col[ColBG]);
+	XFillRectangles(dc->dpy, dc->drawable, dc->gc, &r, 1);
 	if(!text)
 		return;
 	olen = strlen(text);
-	h = dc.font.height;
-	y = dc.y + ((h+2) / 2) - (h / 2) + dc.font.ascent;
-	x = dc.x + (h / 2);
+	h = dc->font.height;
+	y = dc->y + ((h+2) / 2) - (h / 2) + dc->font.ascent;
+	x = dc->x + (h / 2);
 	/* shorten text if necessary */
-	for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
+	for(len = MIN(olen, sizeof buf); len && textnw(dc, text, len) > dc->w - h; len--);
 	if(!len)
 		return;
 	memcpy(buf, text, len);
 	if(len < olen)
 		for(i = len; i && i > len - 3; buf[--i] = '.');
-	XSetForeground(dpy, dc.gc, col[ColFG]);
-	if(dc.font.set)
-		XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
+	XSetForeground(dc->dpy, dc->gc, col[ColFG]);
+	if(dc->font.set)
+		XmbDrawString(dc->dpy, dc->drawable, dc->font.set, dc->gc, x, y, buf, len);
 	else
-		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+		XDrawString(dc->dpy, dc->drawable, dc->gc, x, y, buf, len);
 }
 
 void
-eprint(const char *errstr, ...) {
+eprint(const char *fmt, ...) {
 	va_list ap;
 
 	fprintf(stderr, "%s: ", progname);
-	va_start(ap, errstr);
-	vfprintf(stderr, errstr, ap);
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
 	va_end(ap);
 	exit(EXIT_FAILURE);
 }
 
 unsigned long
-getcolor(const char *colstr) {
-	Colormap cmap = DefaultColormap(dpy, screen);
+getcolor(DC *dc, const char *colstr) {
+	Colormap cmap = DefaultColormap(dc->dpy, DefaultScreen(dc->dpy));
 	XColor color;
 
-	if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
+	if(!XAllocNamedColor(dc->dpy, cmap, colstr, &color, &color))
 		eprint("cannot allocate color '%s'\n", colstr);
 	return color.pixel;
 }
 
 void
-initfont(const char *fontstr) {
+initfont(DC *dc, const char *fontstr) {
 	char *def, **missing = NULL;
 	int i, n;
 
 	if(!fontstr || !*fontstr)
 		eprint("cannot load null font\n");
-	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
+	dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def);
 	if(missing)
 		XFreeStringList(missing);
-	if(dc.font.set) {
+	if(dc->font.set) {
 		XFontStruct **xfonts;
 		char **font_names;
-		dc.font.ascent = dc.font.descent = 0;
-		n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
+		dc->font.ascent = dc->font.descent = 0;
+		n = XFontsOfFontSet(dc->font.set, &xfonts, &font_names);
 		for(i = 0; i < n; i++) {
-			dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
-			dc.font.descent = MAX(dc.font.descent, (*xfonts)->descent);
+			dc->font.ascent = MAX(dc->font.ascent, (*xfonts)->ascent);
+			dc->font.descent = MAX(dc->font.descent, (*xfonts)->descent);
 			xfonts++;
 		}
 	}
 	else {
-		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
-		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
+		if(!(dc->font.xfont = XLoadQueryFont(dc->dpy, fontstr))
+		&& !(dc->font.xfont = XLoadQueryFont(dc->dpy, "fixed")))
 			eprint("cannot load font '%s'\n", fontstr);
-		dc.font.ascent = dc.font.xfont->ascent;
-		dc.font.descent = dc.font.xfont->descent;
+		dc->font.ascent = dc->font.xfont->ascent;
+		dc->font.descent = dc->font.xfont->descent;
 	}
-	dc.font.height = dc.font.ascent + dc.font.descent;
+	dc->font.height = dc->font.ascent + dc->font.descent;
 }
 
 int
-textnw(const char *text, unsigned int len) {
+textnw(DC *dc, const char *text, unsigned int len) {
 	XRectangle r;
 
-	if(dc.font.set) {
-		XmbTextExtents(dc.font.set, text, len, NULL, &r);
+	if(dc->font.set) {
+		XmbTextExtents(dc->font.set, text, len, NULL, &r);
 		return r.width;
 	}
-	return XTextWidth(dc.font.xfont, text, len);
+	return XTextWidth(dc->font.xfont, text, len);
 }
 
 int
-textw(const char *text) {
-	return textnw(text, strlen(text)) + dc.font.height;
+textw(DC *dc, const char *text) {
+	return textnw(dc, text, strlen(text)) + dc->font.height;
 }
diff --git a/draw.h b/draw.h
index d1f1a7c..e4f937a 100644
--- a/draw.h
+++ b/draw.h
@@ -9,6 +9,7 @@ typedef struct {
 	unsigned long norm[ColLast];
 	unsigned long sel[ColLast];
 	Drawable drawable;
+	Display *dpy;
 	GC gc;
 	struct {
 		XFontStruct *xfont;
@@ -20,25 +21,14 @@ typedef struct {
 } DC; /* draw context */
 
 /* forward declarations */
-void drawcleanup(void);
-void drawsetup(void);
-void drawtext(const char *text, unsigned long col[ColLast]);
-void eprint(const char *errstr, ...);
-unsigned long getcolor(const char *colstr);
-void initfont(const char *fontstr);
-int textnw(const char *text, unsigned int len);
-int textw(const char *text);
+void cleanupdraw(DC *dc);
+void setupdraw(DC *dc, Window w);
+void drawtext(DC *dc, const char *text, unsigned long col[ColLast]);
+void eprint(const char *fmt, ...);
+unsigned long getcolor(DC *dc, const char *colstr);
+void initfont(DC *dc, const char *fontstr);
+int textnw(DC *dc, const char *text, unsigned int len);
+int textw(DC *dc, const char *text);
 
 /* variables */
-extern char *progname;
-extern Display *dpy;
-extern DC dc;
-extern int screen;
-extern unsigned int mw, mh;
-extern Window parent;
-
-extern const char *font;
-extern const char *normbgcolor;
-extern const char *normfgcolor;
-extern const char *selbgcolor;
-extern const char *selfgcolor;
+extern const char *progname;
-- 
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