[gtksourceview/wip/chergert/vim] implement P for paste before line

[Christian Hergert <chergert src gnome org>]

commit 882d3c40f9e72402191171fc7138a65116f490f9
Author: Christian Hergert <chergert redhat com>
Date:   Fri Oct 29 15:57:16 2021 -0700

    implement P for paste before line

 gtksourceview/vim/gtk-source-vim-command.c | 61 ++++++++++++++++++++++++++----
 gtksourceview/vim/gtk-source-vim-normal.c  |  5 ++-
 2 files changed, 57 insertions(+), 9 deletions(-)
---
diff --git a/gtksourceview/vim/gtk-source-vim-command.c b/gtksourceview/vim/gtk-source-vim-command.c
index 5732ea49..4428842f 100644
--- a/gtksourceview/vim/gtk-source-vim-command.c
+++ b/gtksourceview/vim/gtk-source-vim-command.c
@@ -170,6 +170,50 @@ gtk_source_vim_command_paste_after (GtkSourceVimCommand *self)
        gtk_source_vim_state_end_user_action (GTK_SOURCE_VIM_STATE (self));
 }
 
+static void
+gtk_source_vim_command_paste_before (GtkSourceVimCommand *self)
+{
+       GtkSourceVimState *registers;
+       GtkSourceBuffer *buffer;
+       GtkTextIter iter;
+       GtkTextIter selection;
+       const char *text;
+       int count;
+
+       buffer = gtk_source_vim_state_get_buffer (GTK_SOURCE_VIM_STATE (self), &iter, &selection);
+       registers = gtk_source_vim_state_get_registers (GTK_SOURCE_VIM_STATE (self));
+       text = gtk_source_vim_registers_get (GTK_SOURCE_VIM_REGISTERS (registers), NULL);
+       count = gtk_source_vim_state_get_count (GTK_SOURCE_VIM_STATE (self));
+
+       if (text == NULL)
+       {
+               return;
+       }
+
+       gtk_text_iter_order (&selection, &iter);
+
+       gtk_source_vim_state_begin_user_action (GTK_SOURCE_VIM_STATE (self));
+
+       /* If there is a \n, this is a linewise paste */
+       if (g_str_has_suffix (text, "\n"))
+       {
+               do
+               {
+                       gtk_text_iter_set_line_offset (&iter, 0);
+                       gtk_text_buffer_insert (GTK_TEXT_BUFFER (buffer), &iter, text, -1);
+               } while (--count > 0);
+       }
+       else
+       {
+               do
+               {
+                       gtk_text_buffer_insert (GTK_TEXT_BUFFER (buffer), &iter, text, -1);
+               } while (--count > 0);
+       }
+
+       gtk_source_vim_state_end_user_action (GTK_SOURCE_VIM_STATE (self));
+}
+
 static void
 gtk_source_vim_command_undo (GtkSourceVimCommand *self)
 {
@@ -381,14 +425,15 @@ gtk_source_vim_command_class_init (GtkSourceVimCommandClass *klass)
 
 #define ADD_COMMAND(name, func) \
        g_hash_table_insert(commands, (char*)name, (gpointer)func)
-       ADD_COMMAND (":join",         gtk_source_vim_command_join);
-       ADD_COMMAND (":j",            gtk_source_vim_command_join);
-       ADD_COMMAND (":undo",         gtk_source_vim_command_undo);
-       ADD_COMMAND (":u",            gtk_source_vim_command_undo);
-       ADD_COMMAND (":redo",         gtk_source_vim_command_redo);
-       ADD_COMMAND (":yank",         gtk_source_vim_command_yank);
-       ADD_COMMAND (":y",            gtk_source_vim_command_yank);
-       ADD_COMMAND (":_paste_after", gtk_source_vim_command_paste_after);
+       ADD_COMMAND (":join",          gtk_source_vim_command_join);
+       ADD_COMMAND (":j",             gtk_source_vim_command_join);
+       ADD_COMMAND (":undo",          gtk_source_vim_command_undo);
+       ADD_COMMAND (":u",             gtk_source_vim_command_undo);
+       ADD_COMMAND (":redo",          gtk_source_vim_command_redo);
+       ADD_COMMAND (":yank",          gtk_source_vim_command_yank);
+       ADD_COMMAND (":y",             gtk_source_vim_command_yank);
+       ADD_COMMAND (":_paste_after",  gtk_source_vim_command_paste_after);
+       ADD_COMMAND (":_paste_before", gtk_source_vim_command_paste_before);
 #undef ADD_COMMAND
 }
 
diff --git a/gtksourceview/vim/gtk-source-vim-normal.c b/gtksourceview/vim/gtk-source-vim-normal.c
index 18133c34..15c5a91f 100644
--- a/gtksourceview/vim/gtk-source-vim-normal.c
+++ b/gtksourceview/vim/gtk-source-vim-normal.c
@@ -420,8 +420,11 @@ key_handler_command (GtkSourceVimNormal *self,
                        gtk_source_vim_normal_begin_command (self, NULL, NULL, ":_paste_after");
                        return TRUE;
 
-               case GDK_KEY_asciitilde:
                case GDK_KEY_P:
+                       gtk_source_vim_normal_begin_command (self, NULL, NULL, ":_paste_before");
+                       return TRUE;
+
+               case GDK_KEY_asciitilde:
                case GDK_KEY_equal:
                case GDK_KEY_plus:
                default: