X-Git-Url: https://git.danieliu.xyz/?a=blobdiff_plain;f=draw.c;h=95ff072a9a0cee5329ba8066d05a11a6cd60a69e;hb=1654d6cd6269bc784ee99045edd89e4bda24149f;hp=6851a3409258a58a85b13a47beafb3063e75bb9d;hpb=b4e63454e5768d38682405d252a81b1149273c0b;p=dmenu.git

diff --git a/draw.c b/draw.c
index 6851a34..95ff072 100644
--- a/draw.c
+++ b/draw.c
@@ -1,143 +1,180 @@
 /* See LICENSE file for copyright and license details. */
+#include <locale.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+#include "draw.h"
 
-/* enums */
-enum { ColFG, ColBG, ColLast };
-
-/* typedefs */
-typedef struct {
-	int x, y, w, h;
-	unsigned long norm[ColLast];
-	unsigned long sel[ColLast];
-	Drawable drawable;
-	GC gc;
-	struct {
-		XFontStruct *xfont;
-		XFontSet set;
-		int ascent;
-		int descent;
-		int height;
-	} font;
-} DC; /* draw context */
-
-/* forward declarations */
-static void dccleanup(void);
-static void dcsetup(void);
-static void drawtext(const char *text, unsigned long col[ColLast]);
-static unsigned long getcolor(const char *colstr);
-static void initfont(const char *fontstr);
-static int textnw(const char *text, unsigned int len);
-static int textw(const char *text);
-
-static DC dc;
+#define MAX(a, b)  ((a) > (b) ? (a) : (b))
+#define MIN(a, b)  ((a) < (b) ? (a) : (b))
+#define DEFFONT    "fixed"
+
+static Bool loadfont(DC *dc, const char *fontstr);
 
 void
-dccleanup(void) {
-	if(dc.font.set)
-		XFreeFontSet(dpy, dc.font.set);
-	else
-		XFreeFont(dpy, dc.font.xfont);
-	XFreePixmap(dpy, dc.drawable);
-	XFreeGC(dpy, dc.gc);
+drawrect(DC *dc, int x, int y, unsigned int w, unsigned int h, Bool fill, unsigned long color) {
+	XRectangle r = { dc->x + x, dc->y + y, w, h };
+
+	if(!fill) {
+		r.width -= 1;
+		r.height -= 1;
+	}
+	XSetForeground(dc->dpy, dc->gc, color);
+	(fill ? XFillRectangles : XDrawRectangles)(dc->dpy, dc->canvas, dc->gc, &r, 1);
 }
 
 void
-dcsetup() {
-	/* style */
-	dc.norm[ColBG] = getcolor(normbgcolor);
-	dc.norm[ColFG] = getcolor(normfgcolor);
-	dc.sel[ColBG] = getcolor(selbgcolor);
-	dc.sel[ColFG] = getcolor(selfgcolor);
-	initfont(font);
-
-	/* 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);
+drawtext(DC *dc, const char *text, unsigned long col[ColLast]) {
+	char buf[BUFSIZ];
+	size_t mn, n = strlen(text);
+
+	/* shorten text if necessary */
+	for(mn = MIN(n, sizeof buf); textnw(dc, text, mn) + dc->font.height/2 > dc->w; mn--)
+		if(mn == 0)
+			return;
+	memcpy(buf, text, mn);
+	if(mn < n)
+		for(n = MAX(mn-3, 0); n < mn; buf[n++] = '.');
+
+	drawrect(dc, 0, 0, dc->w, dc->h, True, BG(dc, col));
+	drawtextn(dc, buf, mn, col);
 }
 
 void
-drawtext(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 };
-
-	XSetForeground(dpy, dc.gc, col[ColBG]);
-	XFillRectangles(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);
-	/* shorten text if necessary */
-	for(len = MIN(olen, sizeof buf); len && textnw(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);
-	else
-		XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
+drawtextn(DC *dc, const char *text, size_t n, unsigned long col[ColLast]) {
+	int x = dc->x + dc->font.height/2;
+	int y = dc->y + dc->font.ascent+1;
+
+	XSetForeground(dc->dpy, dc->gc, FG(dc, col));
+	if(dc->font.set)
+		XmbDrawString(dc->dpy, dc->canvas, dc->font.set, dc->gc, x, y, text, n);
+	else {
+		XSetFont(dc->dpy, dc->gc, dc->font.xfont->fid);
+		XDrawString(dc->dpy, dc->canvas, dc->gc, x, y, text, n);
+	}
+}
+
+void
+eprintf(const char *fmt, ...) {
+	va_list ap;
+
+	va_start(ap, fmt);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+
+	if(fmt[strlen(fmt)-1] == ':') {
+		fputc(' ', stderr);
+		perror(NULL);
+	}
+	exit(EXIT_FAILURE);
+}
+
+void
+freedc(DC *dc) {
+	if(dc->font.set)
+		XFreeFontSet(dc->dpy, dc->font.set);
+	if(dc->font.xfont)
+		XFreeFont(dc->dpy, dc->font.xfont);
+	if(dc->canvas)
+		XFreePixmap(dc->dpy, dc->canvas);
+	XFreeGC(dc->dpy, dc->gc);
+	XCloseDisplay(dc->dpy);
+	free(dc);
 }
 
 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))
-		eprint("drawtext: cannot allocate color '%s'\n", colstr);
+	if(!XAllocNamedColor(dc->dpy, cmap, colstr, &color, &color))
+		eprintf("cannot allocate color '%s'\n", colstr);
 	return color.pixel;
 }
 
+DC *
+initdc(void) {
+	DC *dc;
+
+	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+		fprintf(stderr, "no locale support\n");
+	if(!(dc = calloc(1, sizeof *dc)))
+		eprintf("cannot malloc %u bytes:", sizeof *dc);
+	if(!(dc->dpy = XOpenDisplay(NULL)))
+		eprintf("cannot open display\n");
+
+	dc->gc = XCreateGC(dc->dpy, DefaultRootWindow(dc->dpy), 0, NULL);
+	XSetLineAttributes(dc->dpy, dc->gc, 1, LineSolid, CapButt, JoinMiter);
+	return dc;
+}
+
 void
-initfont(const char *fontstr) {
-	char *def, **missing = NULL;
+initfont(DC *dc, const char *fontstr) {
+	if(!loadfont(dc, fontstr ? fontstr : DEFFONT)) {
+		if(fontstr != NULL)
+			fprintf(stderr, "cannot load font '%s'\n", fontstr);
+		if(fontstr == NULL || !loadfont(dc, DEFFONT))
+			eprintf("cannot load font '%s'\n", DEFFONT);
+	}
+	dc->font.height = dc->font.ascent + dc->font.descent;
+}
+
+Bool
+loadfont(DC *dc, const char *fontstr) {
+	char *def, **missing;
 	int i, n;
 
-	if(!fontstr || fontstr[0] == '\0')
-		eprint("drawtext: cannot load font: '%s'\n", fontstr);
-	dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
-	if(missing)
-		XFreeStringList(missing);
-	if(dc.font.set) {
+	if(!*fontstr)
+		return False;
+	if((dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def))) {
+		char **names;
 		XFontStruct **xfonts;
-		char **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);
-			xfonts++;
+
+		n = XFontsOfFontSet(dc->font.set, &xfonts, &names);
+		for(i = dc->font.ascent = dc->font.descent = 0; i < n; i++) {
+			dc->font.ascent = MAX(dc->font.ascent, xfonts[i]->ascent);
+			dc->font.descent = MAX(dc->font.descent, xfonts[i]->descent);
 		}
 	}
-	else {
-		if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
-		&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
-			eprint("drawtext: cannot load font: '%s'\n", fontstr);
-		dc.font.ascent = dc.font.xfont->ascent;
-		dc.font.descent = dc.font.xfont->descent;
+	else if((dc->font.xfont = XLoadQueryFont(dc->dpy, fontstr))) {
+		dc->font.ascent = dc->font.xfont->ascent;
+		dc->font.descent = dc->font.xfont->descent;
 	}
-	dc.font.height = dc.font.ascent + dc.font.descent;
+	if(missing)
+		XFreeStringList(missing);
+	return (dc->font.set || dc->font.xfont);
+}
+
+void
+mapdc(DC *dc, Window win, unsigned int w, unsigned int h) {
+	XCopyArea(dc->dpy, dc->canvas, win, dc->gc, 0, 0, w, h, 0, 0);
+}
+
+void
+resizedc(DC *dc, unsigned int w, unsigned int h) {
+	if(dc->canvas)
+		XFreePixmap(dc->dpy, dc->canvas);
+
+	dc->canvas = XCreatePixmap(dc->dpy, DefaultRootWindow(dc->dpy), w, h,
+	                           DefaultDepth(dc->dpy, DefaultScreen(dc->dpy)));
+	dc->w = w;
+	dc->h = h;
 }
 
 int
-textnw(const char *text, unsigned int len) {
-	XRectangle r;
+textnw(DC *dc, const char *text, size_t len) {
+	if(dc->font.set) {
+		XRectangle r;
 
-	if(dc.font.set) {
-		XmbTextExtents(dc.font.set, text, len, NULL, &r);
+		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;
 }