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	st-copyurl-multiline-20230406-211964d.diff (4361B)
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	1 From 7405bdc89e4c43cfbeabd0d4d822bc62d1e76730 Mon Sep 17 00:00:00 2001
	2 From: Gildasio Junior <[email protected]>
	3 Date: Thu, 6 Apr 2023 14:51:06 -0300
	4 Subject: [PATCH] Loop through urls on screen in both directions
	5
	6 Using previous patches one can loop through urls in the screen in one
	7 direction: botton-up. This patch add a way that can go in the opposite
	8 direction: top-down.
	9
	10 This is usefull in a screen with lots of urls.
	11 ---
	12 config.def.h \| 2 +
	13 st.c \| 101 +++++++++++++++++++++++++++++++++++++++++++++++++++
	14 st.h \| 1 +
	15 3 files changed, 104 insertions(+)
	16
	17 diff --git a/config.def.h b/config.def.h
	18 index 91ab8ca..4df78eb 100644
	19 --- a/config.def.h
	20 +++ b/config.def.h
	21 @@ -201,6 +201,8 @@ static Shortcut shortcuts[] = {
	22 { TERMMOD, XK_Y, selpaste, {.i = …
	23 { ShiftMask, XK_Insert, selpaste, {.i = …
	24 { TERMMOD, XK_Num_Lock, numlock, {.i = …
	25 + { MODKEY, XK_l, copyurl, {.i = …
	26 + { MODKEY\|ShiftMask, XK_L, copyurl, {.i = …
	27 };
	28
	29 /*
	30 diff --git a/st.c b/st.c
	31 index 134e724..c451015 100644
	32 --- a/st.c
	33 +++ b/st.c
	34 @@ -152,6 +152,11 @@ typedef struct {
	35 int narg; /* nb of args */
	36 } STREscape;
	37
	38 +typedef struct {
	39 + int state;
	40 + size_t length;
	41 +} URLdfa;
	42 +
	43 static void execsh(char , char *);
	44 static void stty(char **);
	45 static void sigchld(int);
	46 @@ -201,6 +206,7 @@ static void tdefutf8(char);
	47 static int32_t tdefcolor(const int , int , int);
	48 static void tdeftran(char);
	49 static void tstrsequence(uchar);
	50 +static int daddch(URLdfa *, char);
	51
	52 static void drawregion(int, int, int, int);
	53
	54 @@ -2666,3 +2672,98 @@ redraw(void)
	55 tfulldirt();
	56 draw();
	57 }
	58 +
	59 +int
	60 +daddch(URLdfa *dfa, char c)
	61 +{
	62 + /* () and [] can appear in urls, but excluding them here will r…
	63 + * positives when figuring out where a given url ends.
	64 + */
	65 + static const char URLCHARS[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
	66 + "abcdefghijklmnopqrstuvwxyz"
	67 + "0123456789-._~:/?#@!$&'*+,;=%";
	68 + static const char RPFX[] = "//:sptth";
	69 +
	70 + if (!strchr(URLCHARS, c)) {
	71 + dfa->length = 0;
	72 + dfa->state = 0;
	73 +
	74 + return 0;
	75 + }
	76 +
	77 + dfa->length++;
	78 +
	79 + if (dfa->state == 2 && c == '/') {
	80 + dfa->state = 0;
	81 + } else if (dfa->state == 3 && c == 'p') {
	82 + dfa->state++;
	83 + } else if (c != RPFX[dfa->state]) {
	84 + dfa->state = 0;
	85 + return 0;
	86 + }
	87 +
	88 + if (dfa->state++ == 7) {
	89 + dfa->state = 0;
	90 + return 1;
	91 + }
	92 +
	93 + return 0;
	94 +}
	95 +
	96 +/*
	97 +** Select and copy the previous url on screen (do nothing if there's no…
	98 +*/
	99 +void
	100 +copyurl(const Arg *arg) {
	101 + int row = 0, /* row of current URL */
	102 + col = 0, /* column of current URL start */
	103 + colend = 0, /* column of last occurrence */
	104 + passes = 0; /* how many rows have been scanned */
	105 +
	106 + const char *c = NULL,
	107 + *match = NULL;
	108 + URLdfa dfa = { 0 };
	109 +
	110 + row = (sel.ob.x >= 0 && sel.nb.y > 0) ? sel.nb.y : term.bot;
	111 + LIMIT(row, term.top, term.bot);
	112 +
	113 + colend = (sel.ob.x >= 0 && sel.nb.y > 0) ? sel.nb.x : term.col;
	114 + LIMIT(colend, 0, term.col);
	115 +
	116 + /*
	117 + ** Scan from (term.row - 1,term.col - 1) to (0,0) and find
	118 + ** next occurrance of a URL
	119 + */
	120 + for (passes = 0; passes < term.row; passes++) {
	121 + /* Read in each column of every row until
	122 + ** we hit previous occurrence of URL
	123 + */
	124 + for (col = colend; col--;)
	125 + if (daddch(&dfa, term.line[row][col].u < 128 ? …
	126 + break;
	127 +
	128 + if (col >= 0)
	129 + break;
	130 +
	131 + /* .i = 0 --> botton-up
	132 + * .i = 1 --> top-down
	133 + */
	134 + if (!arg->i) {
	135 + if (--row < 0)
	136 + row = term.row - 1;
	137 + } else {
	138 + if (++row >= term.row)
	139 + row = 0;
	140 + }
	141 +
	142 + colend = term.col;
	143 + }
	144 +
	145 + if (passes < term.row) {
	146 + selstart(col, row, 0);
	147 + selextend((col + dfa.length - 1) % term.col, row + (col…
	148 + selextend((col + dfa.length - 1) % term.col, row + (col…
	149 + xsetsel(getsel());
	150 + xclipcopy();
	151 + }
	152 +}
	153 diff --git a/st.h b/st.h
	154 index fd3b0d8..baa8f29 100644
	155 --- a/st.h
	156 +++ b/st.h
	157 @@ -85,6 +85,7 @@ void printscreen(const Arg *);
	158 void printsel(const Arg *);
	159 void sendbreak(const Arg *);
	160 void toggleprinter(const Arg *);
	161 +void copyurl(const Arg *);
	162
	163 int tattrset(int);
	164 void tnew(int, int);
	165 --
	166 2.40.0
	167