127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
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int url_x1, url_y1, url_x2, url_y2 = -1;
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int url_draw, url_click, url_maxcol;
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static int
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isvalidurlchar(Rune u)
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{
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/* () and [] can appear in urls, but excluding them here will reduce false
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* positives when figuring out where a given url ends. See copyurl patch.
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*/
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static char urlchars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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"abcdefghijklmnopqrstuvwxyz"
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"0123456789-._~:/?#@!$&'*+,;=%";
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return u < 128 && strchr(urlchars, (int)u) != NULL;
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}
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/* find the end of the wrapped line */
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static int
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findeowl(Line line)
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{
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int i = term.col - 1;
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do {
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if (line[i].mode & ATTR_WRAP)
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return i;
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} while (!(line[i].mode & ATTR_SET) && --i >= 0);
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return -1;
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}
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void
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clearurl(void)
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{
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while (url_y1 <= url_y2 && url_y1 < term.row)
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term.dirty[url_y1++] = 1;
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url_y2 = -1;
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}
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char *
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detecturl(int col, int row, int draw)
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{
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static char url[2048];
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Line line;
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int x1, y1, x2, y2;
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int i = sizeof(url)/2+1, j = sizeof(url)/2;
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int row_start = row, col_start = col;
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int minrow = tisaltscr() ? 0 : term.scr - term.histf;
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int maxrow = tisaltscr() ? term.row - 1 : term.scr + term.row - 1;
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/* clear previously underlined url */
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if (draw)
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clearurl();
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url_maxcol = 0;
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line = TLINE(row);
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if (!isvalidurlchar(line[col].u))
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return NULL;
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/* find the first character of url */
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do {
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x1 = col_start, y1 = row_start;
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url_maxcol = MAX(url_maxcol, x1);
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url[--i] = line[col_start].u;
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if (--col_start < 0) {
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if (--row_start < minrow || (col_start = findeowl(TLINE(row_start))) < 0)
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break;
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line = TLINE(row_start);
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}
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} while (isvalidurlchar(line[col_start].u) && i > 0);
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/* early detection */
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if (url[i] != 'h')
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return NULL;
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/* find the last character of url */
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line = TLINE(row);
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do {
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x2 = col, y2 = row;
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url_maxcol = MAX(url_maxcol, x2);
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url[j++] = line[col].u;
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if (line[col++].mode & ATTR_WRAP) {
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if (++row > maxrow)
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break;
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col = 0;
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line = TLINE(row);
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}
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} while (col < term.col && isvalidurlchar(line[col].u) && j < sizeof(url)-1);
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url[j] = 0;
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if (strncmp("https://", &url[i], 8) && strncmp("http://", &url[i], 7))
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return NULL;
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/* Ignore some trailing characters to improve detection. */
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/* Alacritty and many other terminals also ignore these. */
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if (strchr(",.;:?!", (int)(url[j-1])) != NULL) {
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x2 = MAX(x2-1, 0);
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url[j-1] = 0;
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}
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/* underline url (see xdrawglyphfontspecs() in x.c) */
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if (draw) {
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url_x1 = (y1 >= 0) ? x1 : 0;
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url_x2 = (y2 < term.row) ? x2 : url_maxcol;
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url_y1 = MAX(y1, 0);
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url_y2 = MIN(y2, term.row-1);
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url_draw = 1;
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for (y1 = url_y1; y1 <= url_y2; y1++)
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term.dirty[y1] = 1;
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}
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return &url[i];
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}
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void
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openUrlOnClick(int col, int row, char* url_opener)
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{
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char *url = detecturl(col, row, 1);
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if (url) {
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extern char **environ;
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pid_t junk;
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char *argv[] = { url_opener, url, NULL };
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posix_spawnp(&junk, argv[0], NULL, NULL, argv, environ);
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}
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}
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