Simplify drawing of bar text
Non-fitting text is truncated by simply cutting it off. win_textwidth() has been replaced by a simple macro wrapper around win_draw_text() with a maximum width of zero, which results in a dry-run that still calculates the number of pixels used by the text, much like snprintf(3) with a buffer length of zero.
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3c7d6f3528
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85
window.c
85
window.c
@ -362,50 +362,45 @@ void win_clear(win_t *win)
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XFillRectangle(e->dpy, win->buf.pm, gc, 0, 0, win->buf.w, win->buf.h);
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}
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int win_textwidth(const win_env_t *e, const char *text, unsigned int len, bool with_padding, XftFont *fnt)
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#define TEXTWIDTH(win, text, len) \
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win_draw_text(win, NULL, NULL, 0, 0, text, len, 0)
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int win_draw_text(win_t *win, XftDraw *d, XftColor *color, int x, int y,
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char *text, int len, int w)
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{
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int err, tw = 0;
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char *t, *next;
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uint32_t rune;
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XftFont *f;
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FcCharSet *fccharset;
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XGlyphInfo ext;
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XftTextExtentsUtf8(e->dpy, fnt, (XftChar8*)text, len, &ext);
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return ext.xOff + (with_padding ? 2 * H_TEXT_PAD : 0);
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}
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void win_draw_bar_text(win_t *win, XftDraw *d, XftColor *color, XftFont *font, int x, int y, char *text, int maxlen, int maximum_x)
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{
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size_t len = 0;
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int err, xshift = 0, newshift;
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uint32_t codep;
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char *p, *nextp;
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FcCharSet* fccharset;
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XftFont* fallback = NULL;
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for (p = text; *p && (len < maxlen); p = nextp, len++) {
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nextp = utf8_decode(p, &codep, &err);
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if (!XftCharExists(win->env.dpy, font, codep)) {
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for (t = text; t - text < len; t = next) {
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next = utf8_decode(t, &rune, &err);
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if (XftCharExists(win->env.dpy, font, rune)) {
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f = font;
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} else { /* fallback font */
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fccharset = FcCharSetCreate();
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FcCharSetAddChar(fccharset, codep);
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fallback = XftFontOpen(win->env.dpy, win->env.scr,
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FC_CHARSET, FcTypeCharSet, fccharset,
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FC_SCALABLE, FcTypeBool, FcTrue,
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NULL);
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FcCharSetAddChar(fccharset, rune);
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f = XftFontOpen(win->env.dpy, win->env.scr, FC_CHARSET, FcTypeCharSet,
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fccharset, FC_SCALABLE, FcTypeBool, FcTrue, NULL);
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FcCharSetDestroy(fccharset);
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}
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newshift = win_textwidth(&win->env, p, (int) (nextp-p), false, (fallback ? fallback : font));
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if (xshift + newshift <= maximum_x)
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XftDrawStringUtf8(d, color, (fallback ? fallback : font), x + xshift, y, (XftChar8*)p, (int) (nextp-p));
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xshift += newshift;
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if (fallback) {
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XftFontClose(win->env.dpy, fallback);
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fallback = NULL;
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XftTextExtentsUtf8(win->env.dpy, f, (XftChar8*)t, next - t, &ext);
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tw += ext.xOff;
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if (tw <= w) {
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XftDrawStringUtf8(d, color, f, x, y, (XftChar8*)t, next - t);
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x += ext.xOff;
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}
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if (f != font)
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XftFontClose(win->env.dpy, f);
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}
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return tw;
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}
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void win_draw_bar(win_t *win)
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{
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int len, olen, x, y, w, tw, maximum_x;
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char rest[3];
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const char *dots = "...";
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int len, x, y, w, tw;
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win_env_t *e;
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win_bar_t *l, *r;
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XftDraw *d;
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@ -415,7 +410,7 @@ void win_draw_bar(win_t *win)
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e = &win->env;
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y = win->h + font->ascent + V_TEXT_PAD;
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w = win->w;
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w = win->w - 2*H_TEXT_PAD;
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d = XftDrawCreate(e->dpy, win->buf.pm, DefaultVisual(e->dpy, e->scr),
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DefaultColormap(e->dpy, e->scr));
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@ -426,30 +421,16 @@ void win_draw_bar(win_t *win)
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XSetBackground(e->dpy, gc, win->bar.bgcol.pixel);
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if ((len = strlen(r->buf)) > 0) {
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if ((tw = win_textwidth(e, r->buf, len, true, font)) > w)
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if ((tw = TEXTWIDTH(win, r->buf, len)) > w)
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return;
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x = win->w - tw + H_TEXT_PAD;
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x = win->w - tw - H_TEXT_PAD;
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w -= tw;
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XftDrawStringUtf8(d, &win->bar.fgcol, font, x, y, (XftChar8*)r->buf, len);
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win_draw_text(win, d, &win->bar.fgcol, x, y, r->buf, len, tw);
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}
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if ((len = strlen(l->buf)) > 0) {
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olen = len;
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while (len > 0 && (tw = win_textwidth(e, l->buf, len, true, font)) > w)
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len--;
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if (len > 0) {
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maximum_x = w;
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if (len != olen) {
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w = strlen(dots);
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if (len <= w)
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return;
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memcpy(rest, l->buf + len - w, w);
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memcpy(l->buf + len - w, dots, w);
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}
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x = H_TEXT_PAD;
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win_draw_bar_text(win, d, &win->bar.fgcol, font, x, y, l->buf, len, maximum_x);
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if (len != olen)
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memcpy(l->buf + len - w, rest, w);
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}
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w -= 2 * H_TEXT_PAD; /* gap between left and right parts */
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win_draw_text(win, d, &win->bar.fgcol, x, y, l->buf, len, w);
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}
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XftDrawDestroy(d);
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}
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