From acf114b2ec446220edacda6dbcdea1ec537d67b1 Mon Sep 17 00:00:00 2001
From: Moritz Lipp <mlq@pwmt.org>
Date: Fri, 29 Jan 2010 13:42:24 +0100
Subject: [PATCH] Delete last character of the buffer

It is now possible to delete the last character of the buffer using the
backspace key
---
 config.def.h |  1 +
 zathura.c    | 30 +++++++++++++++++++++++++++++-
 2 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/config.def.h b/config.def.h
index f6ec94e..ac36f2c 100644
--- a/config.def.h
+++ b/config.def.h
@@ -70,6 +70,7 @@ Shortcut shortcuts[] = {
   {0,                  GDK_N,             sc_search,            -1,       { BACKWARD } },
   {0,                  GDK_a,             sc_adjust_window,     -1,       { ADJUST_BESTFIT } },
   {0,                  GDK_s,             sc_adjust_window,     -1,       { ADJUST_WIDTH } },
+  {0,                  GDK_BackSpace,     sc_change_buffer,     -1,       { DELETE_LAST } },
 };
 
 /* inputbar shortcuts */
diff --git a/zathura.c b/zathura.c
index d0d7824..c5b78a5 100644
--- a/zathura.c
+++ b/zathura.c
@@ -26,7 +26,7 @@ enum { NEXT, PREVIOUS, LEFT, RIGHT, UP, DOWN,
        ERROR, WARNING, NEXT_GROUP, PREVIOUS_GROUP,
        ZOOM_IN, ZOOM_OUT, ZOOM_ORIGINAL, ZOOM_SPECIFIC,
        FORWARD, BACKWARD, ADJUST_BESTFIT, ADJUST_WIDTH,
-       CONTINUOUS };
+       CONTINUOUS, DELETE_LAST };
 
 /* typedefs */
 struct CElement
@@ -230,6 +230,7 @@ void* search(void*);
 /* shortcut declarations */
 void sc_abort(Argument*);
 void sc_adjust_window(Argument*);
+void sc_change_buffer(Argument*);
 void sc_change_mode(Argument*);
 void sc_focus_inputbar(Argument*);
 void sc_navigate(Argument*);
@@ -884,6 +885,33 @@ sc_adjust_window(Argument* argument)
   draw(Zathura.PDF.page_number);
 }
 
+void
+sc_change_buffer(Argument* argument)
+{
+  if(!Zathura.Global.buffer)
+    return;
+
+  int buffer_length = Zathura.Global.buffer->len;
+
+  if(argument->n == DELETE_LAST)
+  {
+    if((buffer_length - 1) == 0)
+    {
+      g_string_free(Zathura.Global.buffer, TRUE);
+      Zathura.Global.buffer = NULL;
+      gtk_label_set_markup((GtkLabel*) Zathura.Global.status_buffer, "");
+    }
+    else
+    {
+      GString* temp = g_string_new_len(Zathura.Global.buffer->str, buffer_length - 1);
+      g_string_free(Zathura.Global.buffer, TRUE);
+      Zathura.Global.buffer = temp;
+      gtk_label_set_markup((GtkLabel*) Zathura.Global.status_buffer, Zathura.Global.buffer->str);
+    }
+  }
+
+}
+
 void
 sc_change_mode(Argument* argument)
 {