apply scrollback patch and urlclick patch

1 files changed, 92 insertions, 0 deletions

diff --git a/st.c b/st.c
index 17fc9fb..170a8a8 100644
--- a/st.c
+++ b/st.c
@@ -652,6 +652,98 @@ getsel(void)
         return str;
 }
 
+char *
+strstrany(char* s, char** strs) {
+        char *match;
+        for (int i = 0; strs[i]; i++) {
+                if ((match = strstr(s, strs[i]))) {
+                        return match;
+                }
+        }
+        return NULL;
+}
+
+void
+highlighturls(void)
+{
+        char *match;
+        char *linestr = calloc(sizeof(char), term.col+1); /* assume ascii */
+        for (int i = 0; i < term.row; i++) {
+                Line line = TLINE(i);
+                int url_start = -1;
+                for (int j = 0; j < term.col; j++) {
+                        if (line[j].u < 127) {
+                                linestr[j] = line[j].u;
+                        }
+                        linestr[term.col] = '\0';
+                }
+                while ((match = strstrany(linestr + url_start + 1, urlprefixes))) {
+                        url_start = match - linestr;
+                        for (int c = url_start; c < term.col && strchr(urlchars, linestr[c]); c++) {
+                                line[c].mode |= ATTR_URL;
+                                tsetdirt(i, c);
+                        }
+                }
+        }
+        free(linestr);
+}
+
+void
+unhighlighturls(void)
+{
+        for (int i = 0; i < term.row; i++) {
+                Line line = TLINE(i);
+                for (int j = 0; j < term.col; j++) {
+                        Glyph* g = &line[j];
+                        if (g->mode & ATTR_URL) {
+                                g->mode &= ~ATTR_URL;
+                                tsetdirt(i, j);
+                        }
+                }
+        }
+        return;
+}
+
+void
+followurl(int x, int y) {
+        char *linestr = calloc(sizeof(char), term.col+1); /* assume ascii */
+        char *match;
+        Line line = TLINE(x);
+        for (int i = 0; i < term.col; i++) {
+                if (line[i].u < 127) {
+                        linestr[i] = line[i].u;
+                }
+                linestr[term.col] = '\0';
+        }
+        int url_start = -1;
+        while ((match = strstrany(linestr + url_start + 1, urlprefixes))) {
+                url_start = match - linestr;
+                int url_end = url_start;
+                for (int c = url_start; c < term.col && strchr(urlchars, linestr[c]); c++) {
+                        url_end++;
+                }
+                if (url_start <= y && y < url_end) {
+                        linestr[url_end] = '\0';
+                        break;
+                }
+        }
+        if (url_start == -1) {
+                free(linestr);
+                return;
+        }
+
+        pid_t chpid;
+        if ((chpid = fork()) == 0) {
+                if (fork() == 0)
+                        execlp(urlhandler, urlhandler, linestr + url_start, NULL);
+                exit(1);
+        }
+        if (chpid > 0)
+                waitpid(chpid, NULL, 0);
+        free(linestr);
+        unhighlighturls();
+}
+
 void
 selclear(void)
 {