libsl

commit bfdec1e2d45497b6d53e366aa31e063214829023
Author: Anselm R Garbe <anselm@garbe.us>
Date:   Mon, 10 Dec 2012 10:04:58 +0100

initial commit

Diffstat:
A
arg.h
 | 
41
+++++++++++++++++++++++++++++++++++++++++
A
drw.c
 | 
202
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
drw.h
 | 
61
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
util.c
 | 
17
+++++++++++++++++
A
util.h
 | 
6
++++++

5 files changed, 327 insertions(+), 0 deletions(-)
diff --git a/arg.h b/arg.h
@@ -0,0 +1,41 @@
+/*
+ * Copy me if you can.
+ * by 20h
+ */
+
+#ifndef __ARG_H__
+#define __ARG_H__
+
+extern char *argv0;
+
+#define USED(x) ((void)(x))
+
+#define ARGBEGIN	for (argv0 = *argv, argv++, argc--;\
+					argv[0] && argv[0][1]\
+					&& argv[0][0] == '-';\
+					argc--, argv++) {\
+				char _argc;\
+				char **_argv;\
+				if (argv[0][1] == '-' && argv[0][2] == '\0') {\
+					argv++;\
+					argc--;\
+					break;\
+				}\
+				for (argv[0]++, _argv = argv; argv[0][0];\
+						argv[0]++) {\
+					if (_argv != argv)\
+						break;\
+					_argc = argv[0][0];\
+					switch (_argc)
+
+#define ARGEND			}\
+				USED(_argc);\
+			}\
+			USED(argv);\
+			USED(argc);
+
+#define EARGF(x)	((argv[1] == NULL)? ((x), abort(), (char *)0) :\
+			(argc--, argv++, argv[0]))
+
+#endif
+
diff --git a/drw.c b/drw.c
@@ -0,0 +1,202 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <X11/Xlib.h>
+
+#include "drw.h"
+#include "util.h"
+
+Drw *
+drw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h) {
+	Drw *drw = (Drw *)calloc(1, sizeof(Drw));
+	drw->dpy = dpy;
+	drw->screen = screen;
+	drw->win = win;
+	drw->w = w;
+	drw->h = h;
+	drw->drwable = XCreatePixmap(dpy, win, w, h, DefaultDepth(dpy, screen));
+	drw->gc = XCreateGC(dpy, win, 0, NULL);
+	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->w = w;
+	drw->h = h;
+	XFreePixmap(drw->dpy, drw->drwable);
+	drw->drwable = XCreatePixmap(drw->dpy, drw->win, w, h, DefaultDepth(drw->dpy, drw->screen));
+}
+
+void
+drw_free(Drw *drw) {
+	XFreePixmap(drw->dpy, drw->drwable);
+	XFreeGC(drw->dpy, drw->gc);
+	free(drw);
+}
+
+Fnt *
+drw_font_create(Drw *drw, const char *fontname) {
+	Fnt *font;
+	char *def, **missing;
+	int n;
+
+	if(!drw)
+		return NULL;
+	font = (Fnt *)calloc(1, sizeof(Fnt));
+	font->set = XCreateFontSet(drw->dpy, fontname, &missing, &n, &def);
+	if(missing) {
+		while(n--)
+			fprintf(stderr, "drw: missing fontset: %s\n", missing[n]);
+		XFreeStringList(missing);
+	}
+	if(font->set) {
+		XFontStruct **xfonts;
+		char **font_names;
+		XExtentsOfFontSet(font->set);
+		n = XFontsOfFontSet(font->set, &xfonts, &font_names);
+		while(n--) {
+			font->ascent = MAX(font->ascent, (*xfonts)->ascent);
+			font->descent = MAX(font->descent,(*xfonts)->descent);
+			xfonts++;
+		}
+	}
+	else {
+		if(!(font->xfont = XLoadQueryFont(drw->dpy, fontname))
+		&& !(font->xfont = XLoadQueryFont(drw->dpy, "fixed")))
+			die("error, cannot load font: '%s'\n", fontname);
+		font->ascent = font->xfont->ascent;
+		font->descent = font->xfont->descent;
+	}
+	font->h = font->ascent + font->descent;
+	return font;
+}
+
+void
+drw_font_free(Drw *drw, Fnt *font) {
+	if(!drw || !font)
+		return;
+	if(font->set)
+		XFreeFontSet(drw->dpy, font->set);
+	else
+		XFreeFont(drw->dpy, font->xfont);
+	free(font);
+}
+
+Clr *
+drw_clr_create(Drw *drw, const char *clrname) {
+	Clr *clr = (Clr *)calloc(1, sizeof(Clr));
+	Colormap cmap = DefaultColormap(drw->dpy, drw->screen);
+	XColor color;
+
+	if(!XAllocNamedColor(drw->dpy, cmap, clrname, &color, &color))
+		die("error, cannot allocate color '%s'\n", clrname);
+	clr->rgb = color.pixel;
+	return clr;
+}
+
+void
+drw_clr_free(Drw *drw, Clr *clr) {
+	if(!clr)
+		return;
+	free(clr);
+}
+
+void
+drw_setfont(Drw *drw, Fnt *font) {
+	if(!drw)
+		return;
+	drw->font = font;
+}
+
+void
+drw_setfg(Drw *drw, Clr *clr) {
+	if(!drw) 
+		return;
+	drw->fg = clr;
+}
+
+void
+drw_setbg(Drw *drw, Clr *clr) {
+	if(!drw)
+		return;
+	drw->bg = clr;
+}
+
+void
+drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert) {
+	int dx;
+
+	if(!drw || !drw->font || !drw->fg || !drw->bg)
+		return;
+	XSetForeground(drw->dpy, drw->gc, invert ? drw->bg->rgb : drw->fg->rgb);
+	dx = (drw->font->ascent + drw->font->descent + 2) / 4;
+	if(filled)
+		XFillRectangle(drw->dpy, drw->drwable, drw->gc, x+1, y+1, dx+1, dx+1);
+	else if(empty)
+		XDrawRectangle(drw->dpy, drw->drwable, drw->gc, x+1, y+1, dx, dx);
+}
+
+void
+drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert) {
+	char buf[256];
+	int i, tx, ty, len, olen;
+	Extnts tex;
+
+	if(!drw || !drw->fg || !drw->bg)
+		return;
+	XSetForeground(drw->dpy, drw->gc, invert ? drw->fg->rgb : drw->bg->rgb);
+	XFillRectangle(drw->dpy, drw->drwable, drw->gc, x, y, w, h);
+	if(!text || !drw->font)
+		return;
+	olen = strlen(text);
+	drw_getexts(drw, text, olen, &tex);
+	ty = y + (h / 2) - tex.yOff;
+	tx = x + tex.xOff;
+	/* shorten text if necessary */
+	for(len = MIN(olen, sizeof buf); len && tex.w > w - tex.h; len--)
+		drw_getexts(drw, text, len, &tex);
+	if(!len)
+		return;
+	memcpy(buf, text, len);
+	if(len < olen)
+		for(i = len; i && i > len - 3; buf[--i] = '.');
+	XSetForeground(drw->dpy, drw->gc, invert ? drw->bg->rgb : drw->fg->rgb);
+	if(drw->font->set)
+		XmbDrawString(drw->dpy, drw->drwable, drw->font->set, drw->gc, tx, ty, buf, len);
+	else
+		XDrawString(drw->dpy, drw->drwable, drw->gc, tx, ty, buf, len);
+}
+
+void
+drw_map(Drw *drw, int x, int y, unsigned int w, unsigned int h) {
+	if(!drw)
+		return;
+	XCopyArea(drw->dpy, drw->drwable, drw->win, drw->gc, x, y, w, h, x, y);
+	XSync(drw->dpy, False);
+}
+
+
+void
+drw_getexts(Drw *drw, const char *text, unsigned int len, Extnts *tex) {
+	XRectangle r;
+
+	if(!drw || !drw->font || !text)
+		return;
+	if(drw->font->set) {
+		XmbTextExtents(drw->font->set, text, len, NULL, &r);
+		tex->xOff = r.x;
+		tex->yOff = r.y;
+		tex->w = r.width;
+		tex->h = r.height;
+	}
+	else {
+		tex->h = drw->font->ascent + drw->font->descent;
+		tex->w = XTextWidth(drw->font->xfont, text, len);
+		tex->xOff = tex->h / 2;
+		tex->yOff = (tex->h / 2) + drw->font->ascent;
+	}
+}
diff --git a/drw.h b/drw.h
@@ -0,0 +1,61 @@
+/* See LICENSE file for copyright and license details. */
+
+typedef struct {
+	unsigned long rgb;
+} Clr;
+
+typedef struct {
+	int ascent;
+	int descent;
+	unsigned int h;
+	XFontSet set;
+	XFontStruct *xfont;
+} Fnt;
+
+typedef struct {
+	unsigned int w, h;
+	Display *dpy;
+	int screen;
+	Window win;
+	Drawable drwable;
+	GC gc;
+	Clr *fg;
+	Clr *bg;
+	Fnt *font;
+} Drw;
+
+typedef struct {
+	unsigned int w;
+	unsigned int h;
+	int xOff;
+	int yOff;
+} Extnts;
+
+/* Drawable abstraction */
+Drw *drw_create(Display *dpy, int screen, Window win, unsigned int w, unsigned int h);
+void drw_resize(Drw *drw, unsigned int w, unsigned int h);
+void drw_free(Drw *drw);
+
+/* Fnt abstraction */
+Fnt *drw_font_create(Drw *drw, const char *fontname);
+void drw_font_free(Drw *drw, Fnt *font);
+
+/* Clrour abstraction */
+Clr *drw_clr_create(Drw *drw, const char *clrname);
+void drw_clr_free(Drw *drw, Clr *clr);
+
+/* Drawing context manipulation */
+void drw_setfont(Drw *drw, Fnt *font);
+void drw_setfg(Drw *drw, Clr *clr);
+void drw_setbg(Drw *drw, Clr *clr);
+
+/* Drawing functions */
+void drw_rect(Drw *drw, int x, int y, unsigned int w, unsigned int h, Bool filled, Bool empty, Bool invert);
+void drw_text(Drw *drw, int x, int y, unsigned int w, unsigned int h, const char *text, Bool invert);
+
+/* Map functions */
+void drw_map(Drw *drw, int x, int y, unsigned int w, unsigned int h);
+
+/* Text functions */
+void drw_getexts(Drw *drw, const char *text, unsigned int len, Extnts *extnts);
+
diff --git a/util.c b/util.c
@@ -0,0 +1,17 @@
+/* See LICENSE file for copyright and license details. */
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "util.h"
+
+void
+die(const char *errstr, ...) {
+	va_list ap;
+
+	va_start(ap, errstr);
+	vfprintf(stderr, errstr, ap);
+	va_end(ap);
+	exit(EXIT_FAILURE);
+}
+
diff --git a/util.h b/util.h
@@ -0,0 +1,6 @@
+/* See LICENSE file for copyright and license details. */
+
+#define MAX(A, B)               ((A) > (B) ? (A) : (B))
+#define MIN(A, B)               ((A) < (B) ? (A) : (B))
+
+void die(const char *errstr, ...);