diff options
Diffstat (limited to 'draw.c')
| -rw-r--r-- | draw.c | 143 |
1 files changed, 143 insertions, 0 deletions
@@ -0,0 +1,143 @@ +/* See LICENSE file for copyright and license details. */ + +/* 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; + +void +dccleanup(void) { + if(dc.font.set) + XFreeFontSet(dpy, dc.font.set); + else + XFreeFont(dpy, dc.font.xfont); + XFreePixmap(dpy, dc.drawable); + XFreeGC(dpy, dc.gc); +} + +void +dcsetup() { + /* style */ + dc.norm[ColBG] = getcolor(normbgcolor); + dc.norm[ColFG] = getcolor(normfgcolor); + dc.sel[ColBG] = getcolor(selbgcolor); + dc.sel[ColFG] = getcolor(selfgcolor); + initfont(font); + + /* 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); +} + +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); +} + +unsigned long +getcolor(const char *colstr) { + Colormap cmap = DefaultColormap(dpy, screen); + XColor color; + + if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color)) + eprint("drawtext: cannot allocate color '%s'\n", colstr); + return color.pixel; +} + +void +initfont(const char *fontstr) { + char *def, **missing = NULL; + int i, n; + + 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); + 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++; + } + } + 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; + } + dc.font.height = dc.font.ascent + dc.font.descent; +} + +int +textnw(const char *text, unsigned int len) { + XRectangle r; + + if(dc.font.set) { + XmbTextExtents(dc.font.set, text, len, NULL, &r); + return r.width; + } + return XTextWidth(dc.font.xfont, text, len); +} + +int +textw(const char *text) { + return textnw(text, strlen(text)) + dc.font.height; +} |