code-golfing: cleanup osc color related code
* adds missing function prototype * move xgetcolor() prototype to win.h (that's where all the other x.c func prototype seems to be declared at) * check for snprintf error/truncation * reduces code duplication for osc 10/11/12 * unify osc_color_response() and osc4_color_response() into a single function the latter two was suggested by Quentin Rameau in his patch review on the hackers list. ref. https://git.suckless.org/st/commit/8629d9a1da72cc18568a8f146307b0e939b77ebf.html
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Bakkeby
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119
st.c
119
st.c
@ -48,6 +48,8 @@
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#endif // UNDERCURL_PATCH
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#define STR_BUF_SIZ ESC_BUF_SIZ
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#define STR_ARG_SIZ ESC_ARG_SIZ
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#define STR_TERM_ST "\033\\"
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#define STR_TERM_BEL "\007"
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/* macros */
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#define IS_SET(flag) ((term.mode & (flag)) != 0)
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@ -146,6 +148,7 @@ typedef struct {
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size_t len; /* raw string length */
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char *args[STR_ARG_SIZ];
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int narg; /* nb of args */
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char *term; /* terminator: ST or BEL */
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} STREscape;
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static void execsh(char *, char **);
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@ -163,8 +166,7 @@ static void readcolonargs(char **, int, int[][CAR_PER_ARG]);
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#endif // UNDERCURL_PATCH
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static void csiparse(void);
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static void csireset(void);
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static void osc4_color_response(int num);
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static void osc_color_response(int index, int num);
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static void osc_color_response(int, int, int);
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static int eschandle(uchar);
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static void strdump(void);
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static void strhandle(void);
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@ -2363,39 +2365,28 @@ csireset(void)
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}
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void
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osc4_color_response(int num)
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osc_color_response(int num, int index, int is_osc4)
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{
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int n;
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char buf[32];
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unsigned char r, g, b;
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if (xgetcolor(num, &r, &g, &b)) {
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fprintf(stderr, "erresc: failed to fetch osc4 color %d\n", num);
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if (xgetcolor(is_osc4 ? num : index, &r, &g, &b)) {
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fprintf(stderr, "erresc: failed to fetch %s color %d\n",
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is_osc4 ? "osc4" : "osc",
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is_osc4 ? num : index);
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return;
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}
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n = snprintf(buf, sizeof buf, "\033]4;%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
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num, r, r, g, g, b, b);
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ttywrite(buf, n, 1);
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}
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void
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osc_color_response(int index, int num)
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{
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int n;
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char buf[32];
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unsigned char r, g, b;
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if (xgetcolor(index, &r, &g, &b)) {
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fprintf(stderr, "erresc: failed to fetch osc color %d\n", index);
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return;
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n = snprintf(buf, sizeof buf, "\033]%s%d;rgb:%02x%02x/%02x%02x/%02x%02x%s",
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is_osc4 ? "4;" : "", num, r, r, g, g, b, b, strescseq.term);
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if (n < 0 || n >= sizeof(buf)) {
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fprintf(stderr, "error: %s while printing %s response\n",
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n < 0 ? "snprintf failed" : "truncation occurred",
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is_osc4 ? "osc4" : "osc");
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} else {
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ttywrite(buf, n, 1);
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}
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n = snprintf(buf, sizeof buf, "\033]%d;rgb:%02x%02x/%02x%02x/%02x%02x\007",
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num, r, r, g, g, b, b);
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ttywrite(buf, n, 1);
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}
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void
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@ -2408,6 +2399,11 @@ strhandle(void)
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int i, x, y, x1, y1, x2, y2, numimages;
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int cx, cy;
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Line line;
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const struct { int idx; char *str; } osc_table[] = {
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{ defaultfg, "foreground" },
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{ defaultbg, "background" },
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{ defaultcs, "cursor" }
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};
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#if SCROLLBACK_PATCH
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int scr = IS_SET(MODE_ALTSCREEN) ? 0 : term.scr;
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#else
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@ -2458,62 +2454,34 @@ strhandle(void)
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case 8: /* Clear Hyperlinks */
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return;
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case 10:
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if (narg < 2)
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break;
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p = strescseq.args[1];
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if (!strcmp(p, "?"))
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osc_color_response(defaultfg, 10);
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else if (xsetcolorname(defaultfg, p))
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fprintf(stderr, "erresc: invalid foreground color: %s\n", p);
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else
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tfulldirt();
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return;
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case 11:
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if (narg < 2)
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break;
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p = strescseq.args[1];
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if (!strcmp(p, "?"))
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osc_color_response(defaultbg, 11);
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else if (xsetcolorname(defaultbg, p))
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fprintf(stderr, "erresc: invalid background color: %s\n", p);
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else
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tfulldirt();
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return;
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case 12:
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if (narg < 2)
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break;
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p = strescseq.args[1];
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if ((j = par - 10) < 0 || j >= LEN(osc_table))
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break; /* shouldn't be possible */
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if (!strcmp(p, "?"))
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osc_color_response(defaultcs, 12);
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else if (xsetcolorname(defaultcs, p))
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fprintf(stderr, "erresc: invalid cursor color: %s\n", p);
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else
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if (!strcmp(p, "?")) {
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osc_color_response(par, osc_table[j].idx, 0);
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} else if (xsetcolorname(osc_table[j].idx, p)) {
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fprintf(stderr, "erresc: invalid %s color: %s\n",
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osc_table[j].str, p);
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} else {
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tfulldirt();
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}
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return;
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case 4: /* color set */
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if ((par == 4 && narg < 3) || narg < 2)
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if (narg < 3)
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break;
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p = strescseq.args[((par == 4) ? 2 : 1)];
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p = strescseq.args[2];
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/* FALLTHROUGH */
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case 104: /* color reset */
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if (par == 10)
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j = defaultfg;
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else if (par == 11)
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j = defaultbg;
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else if (par == 12)
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j = defaultcs;
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else
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j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
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j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
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if (p && !strcmp(p, "?"))
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osc4_color_response(j);
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else if (xsetcolorname(j, p)) {
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if (p && !strcmp(p, "?")) {
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osc_color_response(j, 0, 1);
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} else if (xsetcolorname(j, p)) {
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if (par == 104 && narg <= 1) {
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xloadcols();
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return; /* color reset without parameter */
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@ -2521,8 +2489,10 @@ strhandle(void)
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fprintf(stderr, "erresc: invalid color j=%d, p=%s\n",
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j, p ? p : "(null)");
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} else {
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if (j == defaultbg)
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xclearwin();
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/*
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* TODO if defaultbg color is changed, borders
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* are dirty
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*/
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tfulldirt();
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}
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return;
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@ -2669,7 +2639,7 @@ strdump(void)
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fprintf(stderr, "(%02x)", c);
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}
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}
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fprintf(stderr, "ESC\\\n");
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fprintf(stderr, (strescseq.term[0] == 0x1b) ? "ESC\\\n" : "BEL\n");
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}
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void
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@ -2861,6 +2831,7 @@ tcontrolcode(uchar ascii)
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case '\a': /* BEL */
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if (term.esc & ESC_STR_END) {
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/* backwards compatibility to xterm */
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strescseq.term = STR_TERM_BEL;
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strhandle();
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} else {
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xbell();
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@ -3074,8 +3045,10 @@ eschandle(uchar ascii)
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tcursor(CURSOR_LOAD);
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break;
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case '\\': /* ST -- String Terminator */
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if (term.esc & ESC_STR_END)
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if (term.esc & ESC_STR_END) {
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strescseq.term = STR_TERM_ST;
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strhandle();
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}
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break;
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default:
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fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
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