buflist: add mouse support

New options:
- buflist.look.mouse_jump_visited_buffer
- buflist.look.mouse_move_buffer
- buflist.look.mouse_wheel

New keys added by buflist plugin:
- @item(buflist):button1*      => hsignal:buflist_mouse
- @item(buflist):button2*      => hsignal:buflist_mouse
- @bar(buflist):ctrl-wheelup   => hsignal:buflist_mouse
- @bar(buflist):ctrl-wheeldown => hsignal:buflist_mouse

9 files changed, 388 insertions, 2 deletions

diff --git a/src/plugins/buflist/CMakeLists.txt b/src/plugins/buflist/CMakeLists.txt
index f19e425b7..21d6f0e00 100644
--- a/src/plugins/buflist/CMakeLists.txt
+++ b/src/plugins/buflist/CMakeLists.txt
@@ -21,7 +21,8 @@ add_library(buflist MODULE
 buflist.c buflist.h
 buflist-bar-item.c buflist-bar-item.h
 buflist-command.c buflist-command.h
-buflist-config.c buflist-config.h)
+buflist-config.c buflist-config.h
+buflist-mouse.c buflist-mouse.h)
 set_target_properties(buflist PROPERTIES PREFIX "")
 
 target_link_libraries(buflist)
diff --git a/src/plugins/buflist/Makefile.am b/src/plugins/buflist/Makefile.am
index dabf9c70d..2cc5a3944 100644
--- a/src/plugins/buflist/Makefile.am
+++ b/src/plugins/buflist/Makefile.am
@@ -30,7 +30,9 @@ buflist_la_SOURCES = buflist.c \
                      buflist-command.c \
                      buflist-command.h \
                      buflist-config.c \
-                     buflist-config.h
+                     buflist-config.h \
+                     buflist-mouse.c \
+                     buflist-mouse.h
 
 buflist_la_LDFLAGS = -module -no-undefined
 buflist_la_LIBADD  = $(BUFLIST_LFLAGS)
diff --git a/src/plugins/buflist/buflist-bar-item.c b/src/plugins/buflist/buflist-bar-item.c
index 4a492b649..069aed700 100644
--- a/src/plugins/buflist/buflist-bar-item.c
+++ b/src/plugins/buflist/buflist-bar-item.c
@@ -34,6 +34,7 @@ struct t_hashtable *buflist_hashtable_pointers = NULL;
 struct t_hashtable *buflist_hashtable_extra_vars = NULL;
 struct t_hashtable *buflist_hashtable_options = NULL;
 struct t_hashtable *buflist_hashtable_options_conditions = NULL;
+struct t_arraylist *buflist_list_buffers = NULL;
 
 
 /*
@@ -92,6 +93,11 @@ buflist_bar_item_buflist_cb (const void *pointer, void *data,
     snprintf (str_format_number_empty, sizeof (str_format_number_empty),
               "%%-%ds", length_max_number);
 
+    if (buflist_list_buffers)
+        weechat_arraylist_free (buflist_list_buffers);
+    buflist_list_buffers = weechat_arraylist_new (16, 0, 1,
+                                                  NULL, NULL, NULL, NULL);
+
     buffers = buflist_sort_buffers ();
 
     for (i = 0; i < weechat_arraylist_size (buffers); i++)
@@ -114,6 +120,8 @@ buflist_bar_item_buflist_cb (const void *pointer, void *data,
         if (!rc)
             continue;
 
+        weechat_arraylist_add (buflist_list_buffers, ptr_buffer);
+
         current_buffer = (ptr_buffer == ptr_current_buffer);
 
         ptr_hotlist = weechat_hdata_pointer (buflist_hdata_buffer,
@@ -373,4 +381,10 @@ buflist_bar_item_end ()
 
     weechat_hashtable_free (buflist_hashtable_options_conditions);
     buflist_hashtable_options_conditions = NULL;
+
+    if (buflist_list_buffers)
+    {
+        weechat_arraylist_free (buflist_list_buffers);
+        buflist_list_buffers = NULL;
+    }
 }
diff --git a/src/plugins/buflist/buflist-bar-item.h b/src/plugins/buflist/buflist-bar-item.h
index caf861f62..c015e87ad 100644
--- a/src/plugins/buflist/buflist-bar-item.h
+++ b/src/plugins/buflist/buflist-bar-item.h
@@ -22,6 +22,8 @@
 
 #define BUFLIST_BAR_ITEM_NAME "buflist"
 
+extern struct t_arraylist *buflist_list_buffers;
+
 extern int buflist_bar_item_init ();
 extern void buflist_bar_item_end ();
 
diff --git a/src/plugins/buflist/buflist-config.c b/src/plugins/buflist/buflist-config.c
index 76f7bdf7e..8c814fc9c 100644
--- a/src/plugins/buflist/buflist-config.c
+++ b/src/plugins/buflist/buflist-config.c
@@ -32,6 +32,9 @@ struct t_config_file *buflist_config_file = NULL;
 /* buflist config, look section */
 
 struct t_config_option *buflist_config_look_display_conditions;
+struct t_config_option *buflist_config_look_mouse_jump_visited_buffer;
+struct t_config_option *buflist_config_look_mouse_move_buffer;
+struct t_config_option *buflist_config_look_mouse_wheel;
 struct t_config_option *buflist_config_look_signals_refresh;
 struct t_config_option *buflist_config_look_sort;
 
@@ -218,6 +221,32 @@ buflist_config_init ()
         NULL, NULL, NULL,
         &buflist_config_change_signals_refresh, NULL, NULL,
         NULL, NULL, NULL);
+    buflist_config_look_mouse_jump_visited_buffer = weechat_config_new_option (
+        buflist_config_file, ptr_section,
+        "mouse_jump_visited_buffer", "boolean",
+        N_("if enabled, clicks with left/right buttons on the line with "
+           "current buffer jump to previous/next visited buffer"),
+        NULL, 0, 0, "off", NULL, 0,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL);
+    buflist_config_look_mouse_move_buffer = weechat_config_new_option (
+        buflist_config_file, ptr_section,
+        "mouse_move_buffer", "boolean",
+        N_("if enabled, mouse gestures (drag & drop) move buffers in list"),
+        NULL, 0, 0, "on", NULL, 0,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL);
+    buflist_config_look_mouse_wheel = weechat_config_new_option (
+        buflist_config_file, ptr_section,
+        "mouse_wheel", "boolean",
+        N_("if enabled, mouse wheel up/down actions jump to previous/next "
+           "buffer in list"),
+        NULL, 0, 0, "on", NULL, 0,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL,
+        NULL, NULL, NULL);
     buflist_config_look_signals_refresh = weechat_config_new_option (
         buflist_config_file, ptr_section,
         "signals_refresh", "string",
diff --git a/src/plugins/buflist/buflist-config.h b/src/plugins/buflist/buflist-config.h
index e0c89ff8f..027bcd98a 100644
--- a/src/plugins/buflist/buflist-config.h
+++ b/src/plugins/buflist/buflist-config.h
@@ -25,6 +25,9 @@
 extern struct t_config_file *buflist_config_file;
 
 extern struct t_config_option *buflist_config_look_display_conditions;
+extern struct t_config_option *buflist_config_look_mouse_jump_visited_buffer;
+extern struct t_config_option *buflist_config_look_mouse_move_buffer;
+extern struct t_config_option *buflist_config_look_mouse_wheel;
 extern struct t_config_option *buflist_config_look_signals_refresh;
 extern struct t_config_option *buflist_config_look_sort;
 
diff --git a/src/plugins/buflist/buflist-mouse.c b/src/plugins/buflist/buflist-mouse.c
new file mode 100644
index 000000000..28318d1aa
--- /dev/null
+++ b/src/plugins/buflist/buflist-mouse.c
@@ -0,0 +1,302 @@
+/*
+ * buflist-mouse.c - mouse actions for buflist
+ *
+ * Copyright (C) 2003-2017 Sébastien Helleu <flashcode@flashtux.org>
+ *
+ * This file is part of WeeChat, the extensible chat client.
+ *
+ * WeeChat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * WeeChat is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../weechat-plugin.h"
+#include "buflist.h"
+#include "buflist-mouse.h"
+#include "buflist-bar-item.h"
+#include "buflist-config.h"
+
+
+/*
+ * Callback called when a mouse action occurs in buflist bar item.
+ */
+
+struct t_hashtable *
+buflist_focus_cb (const void *pointer, void *data, struct t_hashtable *info)
+{
+    const char *ptr_bar_item_name, *ptr_bar_item_line;
+    long item_line;
+    char *error, str_pointer[128], str_number[32];
+    struct t_gui_buffer *ptr_buffer;
+    struct t_hdata *ptr_hdata;
+
+    /* make C compiler happy */
+    (void) pointer;
+    (void) data;
+
+    if (!buflist_list_buffers)
+        goto error;
+
+    /* check bar item name */
+    ptr_bar_item_name = weechat_hashtable_get (info, "_bar_item_name");
+    if (strcmp (ptr_bar_item_name, BUFLIST_BAR_ITEM_NAME) != 0)
+        goto error;
+
+    /* check bar item line */
+    ptr_bar_item_line = weechat_hashtable_get (info, "_bar_item_line");
+    if (!ptr_bar_item_line)
+        goto error;
+    item_line = strtol (ptr_bar_item_line, &error, 10);
+    if (!error || error[0])
+        goto error;
+    if ((item_line < 0)
+        || (item_line >= weechat_arraylist_size (buflist_list_buffers)))
+    {
+        goto error;
+    }
+
+    /* check if buffer pointer is still valid */
+    ptr_buffer = weechat_arraylist_get (buflist_list_buffers, item_line);
+    if (!ptr_buffer)
+        goto error;
+    ptr_hdata = weechat_hdata_get ("buffer");
+    if (!weechat_hdata_check_pointer (
+            ptr_hdata,
+            weechat_hdata_get_list (ptr_hdata, "gui_buffers"),
+            ptr_buffer))
+    {
+        goto error;
+    }
+
+    snprintf (str_pointer, sizeof (str_pointer),
+              "0x%lx", (long unsigned int)ptr_buffer);
+    snprintf (str_number, sizeof (str_number), "%d",
+              weechat_buffer_get_integer (ptr_buffer, "number"));
+
+    weechat_hashtable_set (info, "pointer", str_pointer);
+    weechat_hashtable_set (info, "number", str_number);
+    weechat_hashtable_set (info, "full_name",
+                           weechat_buffer_get_string (ptr_buffer, "full_name"));
+
+    return info;
+
+error:
+    weechat_hashtable_set (info, "pointer", "");
+    weechat_hashtable_set (info, "number", "-1");
+    weechat_hashtable_set (info, "full_name", "");
+
+    return info;
+}
+
+/*
+ * Moves a buffer after a mouse gesture in buflist bar.
+ */
+
+void
+buflist_mouse_move_buffer (const char *key, struct t_gui_buffer *buffer,
+                           int number2)
+{
+    struct t_hdata *ptr_hdata;
+    struct t_gui_buffer *ptr_last_gui_buffer;
+    char str_command[128];
+
+    if (!weechat_config_boolean (buflist_config_look_mouse_move_buffer))
+        return;
+
+    if (number2 < 0)
+    {
+        /*
+         * if number is now known (end of gesture outside buflist),
+         * then set it according to mouse gesture
+         */
+        number2 = 1;
+        if (weechat_string_match (key, "*gesture-right", 1)
+            || weechat_string_match (key, "*gesture-down", 1))
+        {
+            number2 = 999999;
+            ptr_hdata = weechat_hdata_get ("buffer");
+            ptr_last_gui_buffer = weechat_hdata_get_list (ptr_hdata,
+                                                          "last_gui_buffer");
+            if (ptr_last_gui_buffer)
+            {
+                number2 = weechat_hdata_integer (ptr_hdata,
+                                                 ptr_last_gui_buffer,
+                                                 "number") + 1;
+            }
+        }
+    }
+
+    snprintf (str_command, sizeof (str_command),
+              "/buffer move %d", number2);
+    weechat_command (buffer, str_command);
+}
+
+/*
+ * Callback called when a mouse action occurs in buflist bar or bar item.
+ */
+
+int
+buflist_hsignal_cb (const void *pointer, void *data, const char *signal,
+                    struct t_hashtable *hashtable)
+{
+    const char *ptr_key, *ptr_pointer, *ptr_number, *ptr_number2;
+    const char *ptr_full_name;
+    struct t_gui_buffer *ptr_buffer;
+    char *error, str_command[1024];
+    long number, number2;
+    long unsigned int value;
+    int rc, current_buffer_number;
+
+    /* make C compiler happy */
+    (void) pointer;
+    (void) data;
+    (void) signal;
+
+    ptr_key = weechat_hashtable_get (hashtable, "_key");
+    ptr_pointer = weechat_hashtable_get (hashtable, "pointer");
+    ptr_number = weechat_hashtable_get (hashtable, "number");
+    ptr_number2 = weechat_hashtable_get (hashtable, "number2");
+    ptr_full_name = weechat_hashtable_get (hashtable, "full_name");
+
+    if (!ptr_key || !ptr_pointer || !ptr_number || !ptr_number2
+        || !ptr_full_name)
+    {
+        return WEECHAT_RC_OK;
+    }
+
+    rc = sscanf (ptr_pointer, "%lx", &value);
+    if ((rc == EOF) || (rc == 0))
+        return WEECHAT_RC_OK;
+    ptr_buffer = (struct t_gui_buffer *)value;
+
+    number = strtol (ptr_number, &error, 10);
+    if (!error || error[0])
+        return WEECHAT_RC_OK;
+    number2 = strtol (ptr_number2, &error, 10);
+    if (!error || error[0])
+        return WEECHAT_RC_OK;
+
+    current_buffer_number = weechat_buffer_get_integer (
+        weechat_current_buffer (), "number");
+
+    if (strcmp (ptr_key, "button1") == 0)
+    {
+        /* left mouse button */
+        if (number == number2)
+        {
+            if (weechat_config_boolean (
+                    buflist_config_look_mouse_jump_visited_buffer)
+                && (current_buffer_number == number))
+            {
+                weechat_command (NULL, "/input jump_previously_visited_buffer");
+            }
+            else
+            {
+                snprintf (str_command, sizeof (str_command),
+                          "/buffer %s", ptr_full_name);
+                weechat_command (NULL, str_command);
+            }
+        }
+        else
+        {
+            /* move buffer */
+            buflist_mouse_move_buffer (ptr_key, ptr_buffer, number2);
+        }
+    }
+    else if (strcmp (ptr_key, "button2") == 0)
+    {
+        if (weechat_config_boolean (
+                buflist_config_look_mouse_jump_visited_buffer)
+            && (current_buffer_number == number))
+        {
+            weechat_command (NULL, "/input jump_next_visited_buffer");
+        }
+    }
+    else if (weechat_string_match (ptr_key, "*wheelup", 1))
+    {
+        if (weechat_config_boolean (buflist_config_look_mouse_wheel))
+        {
+            weechat_command (NULL, "/buffer -1");
+        }
+    }
+    else if (weechat_string_match (ptr_key, "*wheeldown", 1))
+    {
+        if (weechat_config_boolean (buflist_config_look_mouse_wheel))
+        {
+            weechat_command (NULL, "/buffer +1");
+        }
+    }
+    else
+    {
+        /* move buffer */
+        buflist_mouse_move_buffer (ptr_key, ptr_buffer, number2);
+    }
+
+    return WEECHAT_RC_OK;
+}
+
+/*
+ * Initializes mouse.
+ *
+ * Returns:
+ *   1: OK
+ *   0: error
+ */
+
+int
+buflist_mouse_init ()
+{
+    struct t_hashtable *keys;
+
+    keys = weechat_hashtable_new (4,
+                                  WEECHAT_HASHTABLE_STRING,
+                                  WEECHAT_HASHTABLE_STRING,
+                                  NULL, NULL);
+    if (!keys)
+        return 0;
+
+    weechat_hook_focus (BUFLIST_BAR_ITEM_NAME, &buflist_focus_cb, NULL, NULL);
+
+    weechat_hook_hsignal(BUFLIST_MOUSE_HSIGNAL,
+                         &buflist_hsignal_cb, NULL, NULL);
+
+    weechat_hashtable_set (keys,
+                           "@item(" BUFLIST_BAR_ITEM_NAME "):button1*",
+                           "hsignal:" BUFLIST_MOUSE_HSIGNAL);
+    weechat_hashtable_set (keys,
+                           "@item(" BUFLIST_BAR_ITEM_NAME "):button2*",
+                           "hsignal:" BUFLIST_MOUSE_HSIGNAL);
+    weechat_hashtable_set (keys,
+                           "@bar(" BUFLIST_BAR_NAME "):ctrl-wheelup",
+                           "hsignal:" BUFLIST_MOUSE_HSIGNAL);
+    weechat_hashtable_set (keys,
+                           "@bar(" BUFLIST_BAR_NAME "):ctrl-wheeldown",
+                           "hsignal:" BUFLIST_MOUSE_HSIGNAL);
+    weechat_key_bind ("mouse", keys);
+
+    weechat_hashtable_free (keys);
+
+    return 1;
+}
+
+/*
+ * Ends mouse.
+ */
+
+void
+buflist_mouse_end ()
+{
+}
diff --git a/src/plugins/buflist/buflist-mouse.h b/src/plugins/buflist/buflist-mouse.h
new file mode 100644
index 000000000..df4c4e393
--- /dev/null
+++ b/src/plugins/buflist/buflist-mouse.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2003-2017 Sébastien Helleu <flashcode@flashtux.org>
+ *
+ * This file is part of WeeChat, the extensible chat client.
+ *
+ * WeeChat is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * WeeChat is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with WeeChat.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef WEECHAT_BUFLIST_MOUSE_H
+#define WEECHAT_BUFLIST_MOUSE_H 1
+
+#define BUFLIST_MOUSE_HSIGNAL "buflist_mouse"
+
+extern int buflist_mouse_init ();
+extern void buflist_mouse_end ();
+
+#endif /* WEECHAT_BUFLIST_MOUSE_H */
diff --git a/src/plugins/buflist/buflist.c b/src/plugins/buflist/buflist.c
index 4918d2917..08d2889ff 100644
--- a/src/plugins/buflist/buflist.c
+++ b/src/plugins/buflist/buflist.c
@@ -27,6 +27,7 @@
 #include "buflist-bar-item.h"
 #include "buflist-command.h"
 #include "buflist-config.h"
+#include "buflist-mouse.h"
 
 
 WEECHAT_PLUGIN_NAME(BUFLIST_PLUGIN_NAME);
@@ -253,6 +254,8 @@ weechat_plugin_init (struct t_weechat_plugin *plugin, int argc, char *argv[])
 
     weechat_bar_item_update (BUFLIST_BAR_ITEM_NAME);
 
+    buflist_mouse_init ();
+
     return WEECHAT_RC_OK;
 }
 
@@ -266,6 +269,8 @@ weechat_plugin_end (struct t_weechat_plugin *plugin)
     /* make C compiler happy */
     (void) plugin;
 
+    buflist_mouse_end ();
+
     buflist_bar_item_end ();
 
     buflist_config_write ();