From: Daniel Carl <danielcarl@gmx.de>
Date: Fri, 29 Mar 2013 13:21:38 +0000 (+0100)
Subject: Changed history stepping to act like in vim.
X-Git-Url: https://git.owens.tech/git.owens.tech/git.owens.tech/git?a=commitdiff_plain;h=f22afcb2c56c1bd428cf162fd266afd4e658da78;p=vimb.git

Changed history stepping to act like in vim.

Now the history isn't wrap searched. The history can only be started in
previous direction. The latest entry in next direction (latest item) is an
empty items so that we print only the prefix into the input box.

Further the g_list_get_nth_data() was removed, because this is slower than
stepping through the list direct via previous and next.
---

diff --git a/src/command.c b/src/command.c
index 5fd1666..0c0ef3b 100644
--- a/src/command.c
+++ b/src/command.c
@@ -94,8 +94,8 @@ static CommandInfo cmd_list[] = {
     {"zoominfull",          command_zoom,        {COMMAND_ZOOM_IN | COMMAND_ZOOM_FULL}},
     {"zoomoutfull",         command_zoom,        {COMMAND_ZOOM_OUT | COMMAND_ZOOM_FULL}},
     {"zoomreset",           command_zoom,        {COMMAND_ZOOM_RESET}},
-    {"hist-next",           command_history,     {VB_SEARCH_FORWARD}},
-    {"hist-prev",           command_history,     {VB_SEARCH_BACKWARD}},
+    {"hist-next",           command_history,     {0}},
+    {"hist-prev",           command_history,     {1}},
 };
 
 static void command_write_input(const char* str);
diff --git a/src/history.c b/src/history.c
index 378ec5f..b17f391 100644
--- a/src/history.c
+++ b/src/history.c
@@ -30,10 +30,9 @@ static const VbFile file_map[HISTORY_LAST] = {
 };
 
 static struct {
-    unsigned int pointer;
-    char*        prefix;
-    char*        query;
-    GList*       active;
+    char*  prefix;
+    char*  query;
+    GList* active;
 } history;
 
 static GList* history_get_list(const char* input);
@@ -83,35 +82,26 @@ GList* history_get_all(HistoryType type)
  * Retrieves the command from history to be shown in input box.
  * The result must be freed by the caller.
  */
-char* history_get(const char* input, int step)
+char* history_get(const char* input, gboolean prev)
 {
-    char* command = NULL;
-    unsigned int len;
+    GList* new = NULL;
 
-    /* get the search prefix only on start of history search */
     if (!history.active) {
         history.active = history_get_list(input);
-
-        /* if the list is searched forward we would move the history pointer
-         * to the element with index 1, but we should start with 0 */
-        step = step > 0 ? step - 1 : step;
+        history.active = g_list_append(history.active, g_strdup(""));
+        /* start with latest added items */
+        history.active = g_list_last(history.active);
     }
 
-    len = g_list_length(history.active);
-    if (!len) {
-        return NULL;
+    if (prev) {
+        if ((new = g_list_previous(history.active))) {
+            history.active = new;
+        }
+    } else if ((new = g_list_next(history.active))) {
+        history.active = new;
     }
-
-    /* if reached end/beginnen start at the opposite site of list again */
-    history.pointer = (len + history.pointer + step) % len;
-
-    command = g_strconcat(
-        history.prefix,
-        g_list_nth_data(history.active, history.pointer),
-        NULL
-    );
-
-    return command;
+    
+    return g_strconcat(history.prefix, (char*)history.active->data, NULL);
 }
 
 void history_rewind(void)
@@ -121,8 +111,7 @@ void history_rewind(void)
         g_list_free_full(history.active, (GDestroyNotify)g_free);
 
         OVERWRITE_STRING(history.prefix, NULL);
-        history.active  = NULL;
-        history.pointer = 0;
+        history.active = NULL;
     }
 }
 
@@ -183,7 +172,8 @@ static const char* history_get_file_by_type(HistoryType type)
 }
 
 /**
- * Loads history items form file but elemiate duplicates.
+ * Loads history items form file but eleminate duplicates.
+ * Oldest entries first.
  */
 static GList* history_load(const char* file)
 {
@@ -227,7 +217,6 @@ static GList* history_load(const char* file)
             g_free(last->data);
             list = g_list_delete_link(list, last);
         }
-        list = g_list_reverse(list);
     }
 
     return list;
diff --git a/src/history.h b/src/history.h
index e241597..f2cc7f9 100644
--- a/src/history.h
+++ b/src/history.h
@@ -31,7 +31,7 @@ typedef enum {
 void history_cleanup(void);
 void history_add(HistoryType type, const char* value);
 GList* history_get_all(HistoryType type);
-char* history_get(const char* input, int step);
+char* history_get(const char* input, gboolean prev);
 void history_rewind(void);
 void history_list_free(GList** list);