/* 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 DEFAULTFN "fixed"
+
+static Bool loadfont(DC *dc, const char *fontstr);
void
-dccleanup(void) {
- if(dc.font.set)
- XFreeFontSet(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(dpy, dc.font.xfont);
- XFreePixmap(dpy, dc.drawable);
- XFreeGC(dpy, dc.gc);
+ XDrawRectangle(dc->dpy, dc->canvas, dc->gc, dc->x + x, dc->y + y, w-1, h-1);
}
void
-dcsetup(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);
+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[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(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())
+ 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(const char *fontstr) {
- char *def, **missing = NULL;
+initfont(DC *dc, const char *fontstr) {
+ 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[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) {
- 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(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.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;
+}
+
+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(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;
}