Connor Lane Smith
14 years ago
parent
7cf66b443a
commit
a0a99d10e1
6 changed files with 269 additions and 34 deletions
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/* See LICENSE file for copyright and license details. */ |
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#include <locale.h> |
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#include <stdarg.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <X11/Xlib.h> |
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#include "draw.h" |
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#define MAX(a, b) ((a) > (b) ? (a) : (b)) |
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#define MIN(a, b) ((a) < (b) ? (a) : (b)) |
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#define FG(dc, col) ((col)[(dc)->invert ? ColBG : ColFG]) |
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#define BG(dc, col) ((col)[(dc)->invert ? ColFG : ColBG]) |
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#define DEFFONT "fixed" |
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static Bool loadfont(DC *dc, const char *fontstr); |
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void |
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drawrect(DC *dc, int x, int y, unsigned int w, unsigned int h, Bool fill, unsigned long color) { |
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XRectangle r = { dc->x + x, dc->y + y, w, h }; |
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if(!fill) { |
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r.width -= 1; |
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r.height -= 1; |
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} |
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XSetForeground(dc->dpy, dc->gc, color); |
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(fill ? XFillRectangles : XDrawRectangles)(dc->dpy, dc->canvas, dc->gc, &r, 1); |
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} |
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|
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void |
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drawtext(DC *dc, const char *text, unsigned long col[ColLast]) { |
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char buf[256]; |
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size_t n, mn; |
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/* shorten text if necessary */ |
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n = strlen(text); |
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for(mn = MIN(n, sizeof buf); textnw(dc, text, mn) > dc->w - dc->font.height/2; mn--) |
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if(mn == 0) |
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return; |
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memcpy(buf, text, mn); |
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if(mn < n) |
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for(n = MAX(mn-3, 0); n < mn; buf[n++] = '.'); |
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drawrect(dc, 0, 0, dc->w, dc->h, True, BG(dc, col)); |
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drawtextn(dc, buf, mn, col); |
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} |
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|
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void |
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drawtextn(DC *dc, const char *text, size_t n, unsigned long col[ColLast]) { |
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int x, y; |
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x = dc->x + dc->font.height/2; |
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y = dc->y + dc->font.ascent+1; |
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XSetForeground(dc->dpy, dc->gc, FG(dc, col)); |
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if(dc->font.set) |
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XmbDrawString(dc->dpy, dc->canvas, dc->font.set, dc->gc, x, y, text, n); |
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else { |
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XSetFont(dc->dpy, dc->gc, dc->font.xfont->fid); |
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XDrawString(dc->dpy, dc->canvas, dc->gc, x, y, text, n); |
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} |
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} |
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|
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void |
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eprintf(const char *fmt, ...) { |
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va_list ap; |
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fprintf(stderr, "%s: ", progname); |
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va_start(ap, fmt); |
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vfprintf(stderr, fmt, ap); |
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va_end(ap); |
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exit(EXIT_FAILURE); |
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} |
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void |
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freedc(DC *dc) { |
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if(dc->font.set) |
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XFreeFontSet(dc->dpy, dc->font.set); |
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if(dc->font.xfont) |
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XFreeFont(dc->dpy, dc->font.xfont); |
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if(dc->canvas) |
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XFreePixmap(dc->dpy, dc->canvas); |
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XFreeGC(dc->dpy, dc->gc); |
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XCloseDisplay(dc->dpy); |
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free(dc); |
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} |
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unsigned long |
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getcolor(DC *dc, const char *colstr) { |
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Colormap cmap = DefaultColormap(dc->dpy, DefaultScreen(dc->dpy)); |
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XColor color; |
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if(!XAllocNamedColor(dc->dpy, cmap, colstr, &color, &color)) |
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eprintf("cannot allocate color '%s'\n", colstr); |
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return color.pixel; |
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} |
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DC * |
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initdc(void) { |
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DC *dc; |
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if(!setlocale(LC_CTYPE, "") || !XSupportsLocale()) |
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weprintf("no locale support\n"); |
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if(!(dc = malloc(sizeof *dc))) |
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eprintf("cannot malloc %u bytes\n", sizeof *dc); |
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if(!(dc->dpy = XOpenDisplay(NULL))) |
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eprintf("cannot open display\n"); |
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dc->gc = XCreateGC(dc->dpy, DefaultRootWindow(dc->dpy), 0, NULL); |
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XSetLineAttributes(dc->dpy, dc->gc, 1, LineSolid, CapButt, JoinMiter); |
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dc->font.xfont = NULL; |
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dc->font.set = NULL; |
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dc->canvas = None; |
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return dc; |
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} |
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void |
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initfont(DC *dc, const char *fontstr) { |
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if(!loadfont(dc, fontstr ? fontstr : DEFFONT)) { |
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if(fontstr != NULL) |
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weprintf("cannot load font '%s'\n", fontstr); |
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if(fontstr == NULL || !loadfont(dc, DEFFONT)) |
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eprintf("cannot load font '%s'\n", DEFFONT); |
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} |
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dc->font.height = dc->font.ascent + dc->font.descent; |
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} |
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Bool |
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loadfont(DC *dc, const char *fontstr) { |
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char *def, **missing; |
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int i, n; |
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if(!*fontstr) |
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return False; |
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if((dc->font.set = XCreateFontSet(dc->dpy, fontstr, &missing, &n, &def))) { |
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char **names; |
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XFontStruct **xfonts; |
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n = XFontsOfFontSet(dc->font.set, &xfonts, &names); |
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for(i = dc->font.ascent = dc->font.descent = 0; i < n; i++) { |
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dc->font.ascent = MAX(dc->font.ascent, xfonts[i]->ascent); |
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dc->font.descent = MAX(dc->font.descent, xfonts[i]->descent); |
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} |
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} |
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else if((dc->font.xfont = XLoadQueryFont(dc->dpy, fontstr))) { |
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dc->font.ascent = dc->font.xfont->ascent; |
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dc->font.descent = dc->font.xfont->descent; |
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} |
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if(missing) |
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XFreeStringList(missing); |
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return (dc->font.set || dc->font.xfont); |
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} |
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void |
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mapdc(DC *dc, Window win, unsigned int w, unsigned int h) { |
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XCopyArea(dc->dpy, dc->canvas, win, dc->gc, 0, 0, w, h, 0, 0); |
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} |
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void |
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resizedc(DC *dc, unsigned int w, unsigned int h) { |
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if(dc->canvas) |
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XFreePixmap(dc->dpy, dc->canvas); |
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dc->canvas = XCreatePixmap(dc->dpy, DefaultRootWindow(dc->dpy), w, h, |
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DefaultDepth(dc->dpy, DefaultScreen(dc->dpy))); |
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dc->x = dc->y = 0; |
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dc->w = w; |
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dc->h = h; |
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dc->invert = False; |
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} |
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int |
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textnw(DC *dc, const char *text, size_t len) { |
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if(dc->font.set) { |
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XRectangle r; |
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XmbTextExtents(dc->font.set, text, len, NULL, &r); |
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return r.width; |
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} |
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return XTextWidth(dc->font.xfont, text, len); |
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} |
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int |
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textw(DC *dc, const char *text) { |
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return textnw(dc, text, strlen(text)) + dc->font.height; |
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} |
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void |
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weprintf(const char *fmt, ...) { |
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va_list ap; |
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fprintf(stderr, "%s: warning: ", progname); |
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va_start(ap, fmt); |
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vfprintf(stderr, fmt, ap); |
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va_end(ap); |
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} |
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@ -0,0 +1,37 @@ |
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/* See LICENSE file for copyright and license details. */ |
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#define FG(dc, col) ((col)[(dc)->invert ? ColBG : ColFG]) |
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#define BG(dc, col) ((col)[(dc)->invert ? ColFG : ColBG]) |
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enum { ColBG, ColFG, ColBorder, ColLast }; |
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typedef struct { |
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int x, y, w, h; |
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Bool invert; |
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Display *dpy; |
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GC gc; |
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Pixmap canvas; |
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struct { |
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int ascent; |
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int descent; |
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int height; |
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XFontSet set; |
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XFontStruct *xfont; |
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} font; |
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} DC; /* draw context */ |
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unsigned long getcolor(DC *dc, const char *colstr); |
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void drawrect(DC *dc, int x, int y, unsigned int w, unsigned int h, Bool fill, unsigned long color); |
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void drawtext(DC *dc, const char *text, unsigned long col[ColLast]); |
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void drawtextn(DC *dc, const char *text, size_t n, unsigned long col[ColLast]); |
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void initfont(DC *dc, const char *fontstr); |
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void freedc(DC *dc); |
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DC *initdc(void); |
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void mapdc(DC *dc, Window win, unsigned int w, unsigned int h); |
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void resizedc(DC *dc, unsigned int w, unsigned int h); |
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int textnw(DC *dc, const char *text, size_t len); |
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int textw(DC *dc, const char *text); |
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void eprintf(const char *fmt, ...); |
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void weprintf(const char *fmt, ...); |
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const char *progname; |
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