X-Git-Url: https://git.xinqibao.xyz/dmenu.git/blobdiff_plain/96c65400ccdcb76cf20ec7721920f944e6b490ec..32ef0f5662bfe8b8891ba6341d3a27818fb55508:/draw.c

diff --git a/draw.c b/draw.c
index 9142905..76f0c54 100644
--- a/draw.c
+++ b/draw.c
@@ -1,129 +1,170 @@
 /* See LICENSE file for copyright and license details. */
-#include <ctype.h>
 #include <locale.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <strings.h>
 #include <X11/Xlib.h>
 #include "draw.h"
 
-/* macros */
-#define MIN(a, b)               ((a) < (b) ? (a) : (b))
-#define MAX(a, b)               ((a) > (b) ? (a) : (b))
+#define MAX(a, b)  ((a) > (b) ? (a) : (b))
+#define MIN(a, b)  ((a) < (b) ? (a) : (b))
+#define DEFAULTFN  "fixed"
 
-/* variables */
-const char *progname;
+static Bool loadfont(DC *dc, const char *fontstr);
 
 void
-cleanupdraw(DC *dc) {
-	if(dc->font.set)
-		XFreeFontSet(dc->dpy, dc->font.set);
+drawrect(DC *dc, int x, int y, unsigned int w, unsigned int h, Bool fill, unsigned long color) {
+	XSetForeground(dc->dpy, dc->gc, color);
+	if(fill)
+		XFillRectangle(dc->dpy, dc->canvas, dc->gc, dc->x + x, dc->y + y, w, h);
 	else
-		XFreeFont(dc->dpy, dc->font.xfont);
-	XFreePixmap(dc->dpy, dc->drawable);
-	XFreeGC(dc->dpy, dc->gc);
+		XDrawRectangle(dc->dpy, dc->canvas, dc->gc, dc->x + x, dc->y + y, w-1, h-1);
 }
 
 void
-setupdraw(DC *dc, Window w) {
-	XWindowAttributes wa;
+drawtext(DC *dc, const char *text, unsigned long col[ColLast]) {
+	char buf[BUFSIZ];
+	size_t mn, n = strlen(text);
 
-	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);
+	/* 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(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 };
-
-	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);
-	/* shorten text if necessary */
-	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(dc->dpy, dc->gc, col[ColFG]);
+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->drawable, dc->font.set, dc->gc, x, y, buf, len);
-	else
-		XDrawString(dc->dpy, dc->drawable, dc->gc, x, y, buf, len);
+		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
-eprint(const char *fmt, ...) {
+eprintf(const char *fmt, ...) {
 	va_list ap;
 
-	fprintf(stderr, "%s: ", progname);
 	va_start(ap, fmt);
 	vfprintf(stderr, fmt, ap);
 	va_end(ap);
+
+	if(fmt[0] != '\0' && 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(DC *dc, const char *colstr) {
 	Colormap cmap = DefaultColormap(dc->dpy, DefaultScreen(dc->dpy));
 	XColor color;
 
 	if(!XAllocNamedColor(dc->dpy, cmap, colstr, &color, &color))
-		eprint("cannot allocate color '%s'\n", colstr);
+		eprintf("cannot allocate color '%s'\n", colstr);
 	return color.pixel;
 }
 
+DC *
+initdc(void) {
+	DC *dc;
+
+	if(!setlocale(LC_CTYPE, "") || !XSupportsLocale())
+		fputs("no locale support\n", stderr);
+	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(DC *dc, const char *fontstr) {
-	char *def, **missing = NULL;
+	if(!loadfont(dc, fontstr ? fontstr : DEFAULTFN)) {
+		if(fontstr != NULL)
+			fprintf(stderr, "cannot load font '%s'\n", fontstr);
+		if(fontstr == NULL || !loadfont(dc, DEFAULTFN))
+			eprintf("cannot load font '%s'\n", DEFAULTFN);
+	}
+	dc->font.height = dc->font.ascent + dc->font.descent;
+}
+
+Bool
+loadfont(DC *dc, const char *fontstr) {
+	char *def, **missing, **names;
 	int i, n;
+	XFontStruct **xfonts;
 
-	if(!fontstr || !*fontstr)
-		eprint("cannot load null font\n");
-	dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def);
-	if(missing)
-		XFreeStringList(missing);
-	if(dc->font.set) {
-		XFontStruct **xfonts;
-		char **font_names;
-		dc->font.ascent = dc->font.descent = 0;
-		n = XFontsOfFontSet(dc->font.set, &xfonts, &font_names);
+	if(!*fontstr)
+		return False;
+	if((dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def))) {
+		n = XFontsOfFontSet(dc->font.set, &xfonts, &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++;
+			dc->font.ascent  = MAX(dc->font.ascent,  xfonts[i]->ascent);
+			dc->font.descent = MAX(dc->font.descent, xfonts[i]->descent);
+			dc->font.width   = MAX(dc->font.width,   xfonts[i]->max_bounds.width);
 		}
 	}
-	else {
-		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;
+	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.width   = dc->font.xfont->max_bounds.width;
 	}
-	dc->font.height = dc->font.ascent + dc->font.descent;
+	if(missing)
+		XFreeStringList(missing);
+	return dc->font.set || dc->font.xfont;
 }
 
-int
-textnw(DC *dc, const char *text, unsigned int len) {
-	XRectangle r;
+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->w = w;
+	dc->h = h;
+	dc->canvas = XCreatePixmap(dc->dpy, DefaultRootWindow(dc->dpy), w, h,
+	                           DefaultDepth(dc->dpy, DefaultScreen(dc->dpy)));
+}
 
+int
+textnw(DC *dc, const char *text, size_t len) {
 	if(dc->font.set) {
+		XRectangle r;
+
 		XmbTextExtents(dc->font.set, text, len, NULL, &r);
 		return r.width;
 	}