144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/* See LICENSE file for copyright and license details. */
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/* enums */
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enum { ColFG, ColBG, ColLast };
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/* typedefs */
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typedef struct {
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int x, y, w, h;
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unsigned long norm[ColLast];
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unsigned long sel[ColLast];
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Drawable drawable;
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GC gc;
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struct {
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XFontStruct *xfont;
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XFontSet set;
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int ascent;
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int descent;
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int height;
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} font;
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} DC; /* draw context */
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/* forward declarations */
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static void dccleanup(void);
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static void dcsetup(void);
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static void drawtext(const char *text, unsigned long col[ColLast]);
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static unsigned long getcolor(const char *colstr);
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static void initfont(const char *fontstr);
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static int textnw(const char *text, unsigned int len);
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static int textw(const char *text);
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static DC dc;
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void
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dccleanup(void) {
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if(dc.font.set)
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XFreeFontSet(dpy, dc.font.set);
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else
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XFreeFont(dpy, dc.font.xfont);
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XFreePixmap(dpy, dc.drawable);
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XFreeGC(dpy, dc.gc);
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}
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void
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dcsetup(void) {
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/* style */
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dc.norm[ColBG] = getcolor(normbgcolor);
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dc.norm[ColFG] = getcolor(normfgcolor);
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dc.sel[ColBG] = getcolor(selbgcolor);
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dc.sel[ColFG] = getcolor(selfgcolor);
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initfont(font);
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/* pixmap */
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dc.drawable = XCreatePixmap(dpy, parent, mw, mh, DefaultDepth(dpy, screen));
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dc.gc = XCreateGC(dpy, parent, 0, NULL);
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XSetLineAttributes(dpy, dc.gc, 1, LineSolid, CapButt, JoinMiter);
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if(!dc.font.set)
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XSetFont(dpy, dc.gc, dc.font.xfont->fid);
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}
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void
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drawtext(const char *text, unsigned long col[ColLast]) {
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char buf[256];
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int i, x, y, h, len, olen;
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XRectangle r = { dc.x, dc.y, dc.w, dc.h };
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XSetForeground(dpy, dc.gc, col[ColBG]);
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XFillRectangles(dpy, dc.drawable, dc.gc, &r, 1);
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if(!text)
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return;
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olen = strlen(text);
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h = dc.font.height;
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y = dc.y + ((h+2) / 2) - (h / 2) + dc.font.ascent;
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x = dc.x + (h / 2);
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/* shorten text if necessary */
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for(len = MIN(olen, sizeof buf); len && textnw(text, len) > dc.w - h; len--);
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if(!len)
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return;
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memcpy(buf, text, len);
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if(len < olen)
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for(i = len; i && i > len - 3; buf[--i] = '.');
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XSetForeground(dpy, dc.gc, col[ColFG]);
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if(dc.font.set)
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XmbDrawString(dpy, dc.drawable, dc.font.set, dc.gc, x, y, buf, len);
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else
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XDrawString(dpy, dc.drawable, dc.gc, x, y, buf, len);
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}
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unsigned long
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getcolor(const char *colstr) {
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Colormap cmap = DefaultColormap(dpy, screen);
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XColor color;
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if(!XAllocNamedColor(dpy, cmap, colstr, &color, &color))
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eprint("drawtext: cannot allocate color '%s'\n", colstr);
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return color.pixel;
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}
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void
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initfont(const char *fontstr) {
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char *def, **missing = NULL;
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int i, n;
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if(!fontstr || fontstr[0] == '\0')
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eprint("drawtext: cannot load font: '%s'\n", fontstr);
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dc.font.set = XCreateFontSet(dpy, fontstr, &missing, &n, &def);
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if(missing)
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XFreeStringList(missing);
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if(dc.font.set) {
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XFontStruct **xfonts;
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char **font_names;
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dc.font.ascent = dc.font.descent = 0;
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n = XFontsOfFontSet(dc.font.set, &xfonts, &font_names);
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for(i = 0; i < n; i++) {
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dc.font.ascent = MAX(dc.font.ascent, (*xfonts)->ascent);
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dc.font.descent = MAX(dc.font.descent, (*xfonts)->descent);
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xfonts++;
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}
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}
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else {
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if(!(dc.font.xfont = XLoadQueryFont(dpy, fontstr))
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&& !(dc.font.xfont = XLoadQueryFont(dpy, "fixed")))
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eprint("drawtext: cannot load font: '%s'\n", 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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dc.font.height = dc.font.ascent + dc.font.descent;
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}
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int
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textnw(const char *text, unsigned int len) {
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XRectangle r;
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if(dc.font.set) {
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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(const char *text) {
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return textnw(text, strlen(text)) + dc.font.height;
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}
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