From c63321bb7a86e31553949c14eb690e35e7417c73 Mon Sep 17 00:00:00 2001
From: Trygve Aaberge <trygveaa@gmail.com>
Date: Wed, 13 May 2020 02:30:32 +0200
Subject: core: Add an option to start multiline input text on a new line

This does the same as the lead_linebreak option in multiline.pl. That
is, when the input contains more than one line, the first line will be
displayed beneath the previous items in the bar. This is practical
because all the lines in the input will be aligned.

Related to #1498
---
 src/core/wee-config.c  |  8 ++++++++
 src/core/wee-config.h  |  1 +
 src/gui/gui-bar-item.c | 41 +++++++++++++++++++++++++----------------
 3 files changed, 34 insertions(+), 16 deletions(-)

diff --git a/src/core/wee-config.c b/src/core/wee-config.c
index 7b24f68fc..7bfd364f5 100644
--- a/src/core/wee-config.c
+++ b/src/core/wee-config.c
@@ -157,6 +157,7 @@ struct t_config_option *config_look_hotlist_suffix;
 struct t_config_option *config_look_hotlist_unique_numbers;
 struct t_config_option *config_look_hotlist_update_on_buffer_switch;
 struct t_config_option *config_look_input_cursor_scroll;
+struct t_config_option *config_look_input_multiline_lead_linebreak;
 struct t_config_option *config_look_input_share;
 struct t_config_option *config_look_input_share_overwrite;
 struct t_config_option *config_look_input_undo_max;
@@ -3369,6 +3370,13 @@ config_weechat_init_options ()
            "to display end of line"),
         NULL, 0, 100, "20", NULL, 0,
         NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
+    config_look_input_multiline_lead_linebreak = config_file_new_option (
+        weechat_config_file, weechat_config_section_look,
+        "input_multiline_lead_linebreak", "boolean",
+        N_("start the input text on a new line when the input contains "
+           "multiple lines, so that the start of the lines align"),
+        NULL, 0, 0, "on", NULL, 0,
+        NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL);
     config_look_input_share = config_file_new_option (
         weechat_config_file, weechat_config_section_look,
         "input_share", "integer",
diff --git a/src/core/wee-config.h b/src/core/wee-config.h
index 7746daa79..f1963426b 100644
--- a/src/core/wee-config.h
+++ b/src/core/wee-config.h
@@ -209,6 +209,7 @@ extern struct t_config_option *config_look_hotlist_suffix;
 extern struct t_config_option *config_look_hotlist_unique_numbers;
 extern struct t_config_option *config_look_hotlist_update_on_buffer_switch;
 extern struct t_config_option *config_look_input_cursor_scroll;
+extern struct t_config_option *config_look_input_multiline_lead_linebreak;
 extern struct t_config_option *config_look_input_share;
 extern struct t_config_option *config_look_input_share_overwrite;
 extern struct t_config_option *config_look_input_undo_max;
diff --git a/src/gui/gui-bar-item.c b/src/gui/gui-bar-item.c
index d8778937e..1391d6ece 100644
--- a/src/gui/gui-bar-item.c
+++ b/src/gui/gui-bar-item.c
@@ -836,9 +836,10 @@ gui_bar_item_input_text_cb (const void *pointer, void *data,
                             struct t_hashtable *extra_info)
 {
     char *ptr_input, *ptr_input2, str_buffer[128], str_start_input[16];
-    char str_cursor[16], *buf, str_key_debug[1024];
+    char str_cursor[16], *buf, str_key_debug[1024], *str_lead_linebreak;
     const char *pos_cursor;
-    int length, length_cursor, length_start_input, buf_pos;
+    int length, length_cursor, length_start_input, length_lead_linebreak;
+    int buf_pos, is_multiline;
 
     /* make C compiler happy */
     (void) pointer;
@@ -937,14 +938,34 @@ gui_bar_item_input_text_cb (const void *pointer, void *data,
         ptr_input = ptr_input2;
     }
 
+    /*
+     * transform '\n' to '\r' so the newlines are displayed as real new lines
+     * instead of spaces
+     */
+    is_multiline = 0;
+    ptr_input2 = ptr_input;
+    while (ptr_input2 && ptr_input2[0])
+    {
+        if (ptr_input2[0] == '\n')
+        {
+            ptr_input2[0] = '\r';
+            is_multiline = 1;
+        }
+        ptr_input2 = (char *)utf8_next_char (ptr_input2);
+    }
+
+    str_lead_linebreak = (is_multiline &&
+        CONFIG_BOOLEAN(config_look_input_multiline_lead_linebreak)) ? "\r" : "";
+    length_lead_linebreak = strlen (str_lead_linebreak);
+
     /* insert "start input" at beginning of string */
     if (ptr_input)
     {
-        length = strlen (ptr_input) + length_start_input + 1;
+        length = strlen (ptr_input) + length_start_input + length_lead_linebreak + 1;
         buf = malloc (length);
         if (buf)
         {
-            snprintf (buf, length, "%s%s", str_start_input, ptr_input);
+            snprintf (buf, length, "%s%s%s", str_start_input, str_lead_linebreak, ptr_input);
             free (ptr_input);
             ptr_input = buf;
         }
@@ -960,18 +981,6 @@ gui_bar_item_input_text_cb (const void *pointer, void *data,
         }
     }
 
-    /*
-     * transform '\n' to '\r' so the newlines are displayed as real new lines
-     * instead of spaces
-     */
-    ptr_input2 = ptr_input;
-    while (ptr_input2 && ptr_input2[0])
-    {
-        if (ptr_input2[0] == '\n')
-            ptr_input2[0] = '\r';
-        ptr_input2 = (char *)utf8_next_char (ptr_input2);
-    }
-
     return ptr_input;
 }
 
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