From e9474c8c82745d82ffb39ff1618a96b10f724077 Mon Sep 17 00:00:00 2001
From: mitchell <70453897+667e-11@users.noreply.github.com>
Date: Sun, 24 Jul 2016 15:40:55 -0400
Subject: Added `events.TAB_CLICKED` event. This allows for the user to
 override the default switch behavior (e.g. switch to an existing split view
 that already has the target buffer open). Thanks to Gabriel Dubatti.

---
 THANKS.md       | 1 +
 core/events.lua | 9 ++++++++-
 core/ui.lua     | 4 ++++
 src/textadept.c | 4 +---
 4 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/THANKS.md b/THANKS.md
index d3ee3b00..d246b0ff 100644
--- a/THANKS.md
+++ b/THANKS.md
@@ -34,6 +34,7 @@ private contract work related to Textadept.
 * Carl Sturtivant
 * Chris Emerson
 * Daniel Wutke
+* Gabriel Dubatti
 * Gilles Grégoire
 * Giovanni Salmeri
 * Ivan Baidakou
diff --git a/core/events.lua b/core/events.lua
index 849c4302..dcaf5716 100644
--- a/core/events.lua
+++ b/core/events.lua
@@ -218,6 +218,13 @@ local M = {}
 --   Emitted when suspending Textadept. If any handler returns `true`, Textadept
 --   does not suspend.
 --   This event is only emitted by the terminal version.
+-- @field TAB_CLICKED (string)
+--   Emitted when the user clicks on a buffer tab.
+--   When connecting to this event, connect with an index of 1 if the handler
+--   needs to run before Textadept switches between buffers.
+--   Arguments:
+--
+--   * _`index`_: The numeric index of the clicked tab.
 -- @field UPDATE_UI (string)
 --   Emitted after the view is visually updated.
 --   Arguments:
@@ -366,7 +373,7 @@ local textadept_events = {
   'buffer_deleted', 'buffer_new', 'csi', 'error', 'find', 'focus',
   'initialized', 'keypress', 'menu_clicked', 'mouse', 'quit', 'replace',
   'replace_all', 'reset_after', 'reset_before', 'resume', 'suspend',
-  'view_after_switch', 'view_before_switch', 'view_new'
+  'tab_clicked', 'view_after_switch', 'view_before_switch', 'view_new'
 }
 for _, e in pairs(textadept_events) do M[e:upper()] = e end
 
diff --git a/core/ui.lua b/core/ui.lua
index a30b5e7a..06d68776 100644
--- a/core/ui.lua
+++ b/core/ui.lua
@@ -302,6 +302,10 @@ events_connect(events.BUFFER_NEW, function()
   buffer:private_lexer_call(SETLEXERLANGUAGE, 'text')
 end)
 
+-- Switches between buffers when a tab is clicked.
+events_connect(events.TAB_CLICKED,
+               function(index) view:goto_buffer(_BUFFERS[index]) end)
+
 -- Sets the title of the Textadept window to the buffer's filename.
 local function set_title()
   local filename = buffer.filename or buffer._type or _L['Untitled']
diff --git a/src/textadept.c b/src/textadept.c
index a9a044f3..1b5eb203 100644
--- a/src/textadept.c
+++ b/src/textadept.c
@@ -1846,9 +1846,7 @@ static void w_quit_osx(GtkosxApplication*_, void*__) {
  */
 static void t_tabchange(GtkNotebook*_, GtkWidget*__, int page_num, void*___) {
   if (tab_sync) return;
-  lL_event(lua, "buffer_before_switch", -1);
-  lL_gotodoc(lua, focused_view, page_num + 1, FALSE);
-  lL_event(lua, "buffer_after_switch", -1);
+  lL_event(lua, "tab_clicked", LUA_TNUMBER, page_num + 1, -1);
 }
 
 /**
-- 
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