From 700fbcf9daf42f028ff6bc1dd73be076f4de1acf Mon Sep 17 00:00:00 2001
From: "Michael D. Lowis" <mike@mdlowis.com>
Date: Fri, 26 Oct 2018 23:46:28 -0400
Subject: [PATCH] added client message to jump open windows to specific line.

---
 src/edit.c      | 21 ++++++++++++++++++---
 src/lib/x11.c   |  2 ++
 src/registrar.c | 30 +++++++++++++++++++++---------
 3 files changed, 41 insertions(+), 12 deletions(-)

diff --git a/src/edit.c b/src/edit.c
index 648087e..a4ed0c1 100644
--- a/src/edit.c
+++ b/src/edit.c
@@ -1,5 +1,6 @@
 #include <x11.h>
 #include <unistd.h>
+#include <stdc.h>
 
 Atom XA_REGISTRAR, XA_OPEN;
 
@@ -19,6 +20,20 @@ Window start_registrar(XConf* x) {
     return XGetSelectionOwner(x->display, XA_REGISTRAR);
 }
 
+void edit_file(XConf* x, Window registrar, char* path, size_t lnnum) {
+    char number[32] = {0};
+    snprintf(number, 32, ":%lu", lnnum);
+    char* rpath = realpath(path, NULL);
+    if (rpath)
+        path = strmcat(rpath, number, 0);
+    else
+        path = strmcat(path, number, 0);
+    XChangeProperty(
+        x->display, registrar, XA_OPEN, XA_STRING, 8, PropModeAppend,
+        (const unsigned char *)path, strlen(path)+1);
+    free(path);
+}
+
 int main(int argc, char** argv) {
     XConf x = {0};
     x11_init(&x);
@@ -32,9 +47,9 @@ int main(int argc, char** argv) {
     } else {
         /* Loop over files and send and OPEN message for each one. */
         for (int i = 1; i < argc; i++) {
-            XChangeProperty(
-                x.display, registrar, XA_OPEN, XA_STRING, 8, PropModeAppend,
-                (const unsigned char *)argv[i], strlen(argv[i])+1);
+            char* addr = strrchr(argv[i], ':');
+            if (addr) *addr = '\0', addr++;
+            edit_file(&x, registrar, argv[i], strtoul((addr ? addr : ""), NULL, 0));
         }
     }
 
diff --git a/src/lib/x11.c b/src/lib/x11.c
index 85d20a6..f3feac2 100644
--- a/src/lib/x11.c
+++ b/src/lib/x11.c
@@ -509,6 +509,8 @@ static void xselrequest(XEvent* e) {
 static void xclientmsg(XEvent* e) {
     if (e->xclient.data.l[0] == XInternAtom(X.display, "WM_DELETE_WINDOW", False))
         win_quit();
+    else if (e->xclient.message_type == XInternAtom(X.display, "GOTO", False))
+        view_setln(win_view(EDIT), e->xclient.data.l[0]);
 }
 
 static void xresize(XEvent* e) {
diff --git a/src/registrar.c b/src/registrar.c
index 3aaf455..a8e9834 100644
--- a/src/registrar.c
+++ b/src/registrar.c
@@ -47,25 +47,37 @@ void win_del(Window id) {
     }
 }
 
+void win_send(XConf* x, Window from, Window to, int mask, char* atom, size_t val) {
+    XEvent ev = {0};
+    ev.xclient.type = ClientMessage;
+    ev.xclient.send_event = True;
+    ev.xclient.message_type = XInternAtom(x->display, atom, False);
+    ev.xclient.window = from;
+    ev.xclient.format = 32;
+    ev.xclient.data.l[0] = val;
+    XSendEvent(x->display, to, False, mask, &ev);
+}
+
 void win_open(XConf* x, char* path) {
+    /* parse out address for later */
+    char* addr = strrchr(path, ':');
+    if (addr) *addr = '\0', addr++;
+    if (!addr) addr = "0";
+
     /* search for an existing window */
     for (TWindow* win = Windows; win; win = win->next) {
         if (!strcmp(win->path, path)) {
-            XEvent ev = {0};
-            ev.xclient.type = ClientMessage;
-            ev.xclient.send_event = True;
-            ev.xclient.message_type = XInternAtom(x->display, "_NET_ACTIVE_WINDOW", False);
-            ev.xclient.window = win->win;
-            ev.xclient.format = 32;
-            XSendEvent(x->display, x->root, False, SubstructureRedirectMask|SubstructureNotifyMask, &ev);
+            win_send(x, win->win, x->root, SubstructureRedirectMask|SubstructureNotifyMask,  "_NET_ACTIVE_WINDOW", 0);
             XMapRaised(x->display, win->win);
+            win_send(x, x->self, win->win, 0,  "GOTO", strtoul(addr, NULL, 0));
             XFlush(x->display);
             return;
         }
     }
+
     /* if we don't find it, spawn a new one */
     if (!fork())
-        exit(execvp("tide", (char*[]){"tide", path, 0}));
+        exit(execvp("tide", (char*[]){"tide", "-l", addr, path, 0}));
 }
 
 void selclear(XConf* x, XEvent* e) {
@@ -85,7 +97,7 @@ void propnotify(XConf* x, XEvent* e) {
     size_t length;
     char* paths = readprop(x, x->self, XA_OPEN, &length);
     char* path = paths;
-    while (length) {
+    while (length && *path) {
         size_t sz = strlen((char*)path)+1;
         win_open(x, (char*)path);
         path += sz, length -= sz;
-- 
2.51.0