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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,196 @@ | ||
| /* 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" | ||
|
|
||
| #define MAX(a, b) ((a) > (b) ? (a) : (b)) | ||
| #define MIN(a, b) ((a) < (b) ? (a) : (b)) | ||
| #define FG(dc, col) ((col)[(dc)->invert ? ColBG : ColFG]) | ||
| #define BG(dc, col) ((col)[(dc)->invert ? ColFG : ColBG]) | ||
| #define DEFFONT "fixed" | ||
|
|
||
| static Bool loadfont(DC *dc, const char *fontstr); | ||
|
|
||
| void | ||
| 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); | ||
| } | ||
|
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||
|
|
||
| void | ||
| drawtext(DC *dc, const char *text, unsigned long col[ColLast]) { | ||
| char buf[256]; | ||
| size_t n, mn; | ||
|
|
||
| /* shorten text if necessary */ | ||
| n = strlen(text); | ||
| for(mn = MIN(n, sizeof buf); textnw(dc, text, mn) > dc->w - dc->font.height/2; 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 | ||
| drawtextn(DC *dc, const char *text, size_t n, unsigned long col[ColLast]) { | ||
| int x, y; | ||
|
|
||
| x = dc->x + dc->font.height/2; | ||
| y = dc->y + dc->font.ascent+1; | ||
|
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| 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; | ||
|
|
||
| fprintf(stderr, "%s: ", progname); | ||
| va_start(ap, fmt); | ||
| vfprintf(stderr, fmt, ap); | ||
| va_end(ap); | ||
| 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)) | ||
| eprintf("cannot allocate color '%s'\n", colstr); | ||
| return color.pixel; | ||
| } | ||
|
|
||
| DC * | ||
| initdc(void) { | ||
| DC *dc; | ||
|
|
||
| if(!setlocale(LC_CTYPE, "") || !XSupportsLocale()) | ||
| weprintf("no locale support\n"); | ||
| if(!(dc = malloc(sizeof *dc))) | ||
| eprintf("cannot malloc %u bytes\n", 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); | ||
| dc->font.xfont = NULL; | ||
| dc->font.set = NULL; | ||
| dc->canvas = None; | ||
| return dc; | ||
| } | ||
|
|
||
| void | ||
| initfont(DC *dc, const char *fontstr) { | ||
| if(!loadfont(dc, fontstr ? fontstr : DEFFONT)) { | ||
| if(fontstr != NULL) | ||
| weprintf("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) | ||
| return False; | ||
| if((dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def))) { | ||
| char **names; | ||
| XFontStruct **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(dc->dpy, fontstr))) { | ||
| dc->font.ascent = dc->font.xfont->ascent; | ||
| dc->font.descent = dc->font.xfont->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->x = dc->y = 0; | ||
| dc->w = w; | ||
| dc->h = h; | ||
| dc->invert = False; | ||
| } | ||
|
|
||
| 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; | ||
| } | ||
| return XTextWidth(dc->font.xfont, text, len); | ||
| } | ||
|
|
||
| int | ||
| textw(DC *dc, const char *text) { | ||
| return textnw(dc, text, strlen(text)) + dc->font.height; | ||
| } | ||
|
|
||
| void | ||
| weprintf(const char *fmt, ...) { | ||
| va_list ap; | ||
|
|
||
| fprintf(stderr, "%s: warning: ", progname); | ||
| va_start(ap, fmt); | ||
| vfprintf(stderr, fmt, ap); | ||
| va_end(ap); | ||
| } |
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