Reload the current page on SIGUSR1 signal

ChangeLog

@@ -26,6 +26,7 @@ dillo-3.2.0 [Not released yet]
  - Set focus_new_tab=NO and show_quit_dialog=NO by default.
  - Fix GET requests over HTTPS via a proxy.
  - Improve image resize logic to always try to preserve the aspect ratio.
+ - Reload current page on SIGUSR1 signal
    Patches: Rodrigo Arias Mallo
 +- Add primitive support for SVG using the nanosvg.h library.
  - Add support for ch, rem, vw, vh, vmin and vmax CSS units.

src/dillo.cc

@@ -2,6 +2,7 @@
  * Dillo web browser
  *
  * Copyright 1999-2007 Jorge Arellano Cid <[email protected]>
+ * Copyright 2024 Rodrigo Arias Mallo <[email protected]>
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -65,6 +66,8 @@
 #include "dw/textblock.hh"
 #include "dw/table.hh"
 
+static volatile sig_atomic_t sig_reload = 0;
+
 /**
  * Command line options structure
  */
@@ -145,6 +148,11 @@ static void raw_sigchld2(int signum)
    }
 }
 
+static void handler_usr1(int signum)
+{
+   sig_reload = 1;
+}
+
 /**
  * Establish SIGCHLD handler
  */
@@ -161,6 +169,11 @@ static void est_sigchld(void)
       perror("sigaction");
       exit(1);
    }
+
+   if (signal(SIGUSR1, handler_usr1) == SIG_ERR) {
+      perror("signal failed");
+      exit(1);
+   }
 }
 
 //----------------------------------------------------------------------------
@@ -580,7 +593,15 @@ int main(int argc, char **argv)
       }
    }
 
-   Fl::run();
+   /* Don't use, as it can be free()'d */
+   bw = NULL;
+
+   while (Fl::wait() > 0) {
+      if (sig_reload) {
+         sig_reload = 0;
+         a_UIcmd_reload_all_active();
+      }
+   }
 
    /*
     * Memory deallocating routines

src/uicmd.cc

@@ -69,6 +69,15 @@ using namespace dw::fltk;
  */
 static const char *save_dir = "";
 
+struct Tabgroup {
+   CustTabs *tabs;
+   struct Tabgroup *next;
+};
+
+/* An stack of CustTabs groups, each maps to one FLTK window. Points to
+ * the last one created. */
+static struct Tabgroup *tabgroups = NULL;
+
 /*
  * Forward declarations
  */
@@ -570,6 +579,13 @@ BrowserWindow *a_UIcmd_browser_window_new(int ww, int wh,
 
    win->box(FL_NO_BOX);
    CustTabs *DilloTabs = new CustTabs(ww, wh, prefs.ui_tab_height);
+
+   struct Tabgroup *tg = new Tabgroup;
+   tg->tabs = DilloTabs;
+   tg->next = tabgroups;
+   tabgroups = tg;
+   _MSG("new: tabgroups=%p\n", (void *) tg);
+
    win->end();
    win->resizable(DilloTabs->wizard());
 
@@ -668,8 +684,27 @@ void a_UIcmd_close_bw(void *vbw)
    delete(layout);
    if (tabs) {
       tabs->remove_tab(ui);
-      if (tabs->num_tabs() == 0)
+      if (tabs->num_tabs() == 0) {
+         /* No more tabs, remove tabgroup */
+         struct Tabgroup *tmp = tabgroups;
+         struct Tabgroup *prev = NULL;
+         for (tmp = tabgroups; tmp; tmp = tmp->next) {
+            if (tmp->tabs == tabs) {
+               if (prev)
+                  prev->next = tmp->next;
+               else
+                  tabgroups = tmp->next;
+               break;
+            }
+            prev = tmp;
+         }
+         if (tmp) {
+            _MSG("gone: tmp=%p tabgroups=%p\n", (void *) tmp, (void *) tabgroups);
+            free(tmp);
+         }
+
          delete tabs->window();
+      }
    }
    a_Bw_free(bw);
 }
@@ -873,6 +908,19 @@ void a_UIcmd_reload(void *vbw)
    a_Nav_reload((BrowserWindow*)vbw);
 }
 
+/*
+ * Reload all active tabs
+ */
+void a_UIcmd_reload_all_active()
+{
+   struct Tabgroup *tg = tabgroups;
+   for (tg = tabgroups; tg; tg = tg->next) {
+      BrowserWindow *bw = a_UIcmd_get_bw_by_widget(tg->tabs->wizard()->value());
+      if (bw)
+         a_UIcmd_reload(bw);
+   }
+}
+
 /*
  * Repush current URL
  */

src/uicmd.hh

@@ -37,6 +37,7 @@ void a_UIcmd_zoom_in(void *vbw);
 void a_UIcmd_zoom_out(void *vbw);
 void a_UIcmd_zoom_reset(void *vbw);
 void a_UIcmd_reload(void *vbw);
+void a_UIcmd_reload_all_active();
 void a_UIcmd_repush(void *vbw);
 void a_UIcmd_redirection0(void *vbw, const DilloUrl *url);
 void a_UIcmd_save(void *vbw);