GtkTextView: various code clean-ups

- only one blank line is enough to separate code sections.
- the 'signals' variable was in the middle of function prototypes.
- compare pointers to NULL in some conditions ("if(blah) should be used
  only if blah is a boolean variable). It makes the code clearer.
- various other things.

gtk/gtktextbuffer.c

@@ -40,7 +40,6 @@
 #include "gtkprivate.h"
 #include "gtkintl.h"
 
-
 /**
  * SECTION:gtktextbuffer
  * @Short_description: Stores attributed text for display in a GtkTextView
@@ -53,7 +52,6 @@
  * types related to the text widget and how they work together.
  */
 
-
 typedef struct _GtkTextLogAttrCache GtkTextLogAttrCache;
 
 struct _GtkTextBufferPrivate
@@ -81,7 +79,6 @@ struct _GtkTextBufferPrivate
   guint has_selection : 1;
 };
 
-
 typedef struct _ClipboardRequest ClipboardRequest;
 
 struct _ClipboardRequest
@@ -161,8 +158,6 @@ static GtkTextBuffer *create_clipboard_contents_buffer (GtkTextBuffer *buffer);
 
 static void gtk_text_buffer_free_target_lists     (GtkTextBuffer *buffer);
 
-static guint signals[LAST_SIGNAL] = { 0 };
-
 static void gtk_text_buffer_set_property (GObject         *object,
 				          guint            prop_id,
 				          const GValue    *value,
@@ -174,6 +169,8 @@ static void gtk_text_buffer_get_property (GObject         *object,
 static void gtk_text_buffer_notify       (GObject         *object,
                                           GParamSpec      *pspec);
 
+static guint signals[LAST_SIGNAL] = { 0 };
+
 G_DEFINE_TYPE_WITH_PRIVATE (GtkTextBuffer, gtk_text_buffer, G_TYPE_OBJECT)
 
 static void
@@ -3892,7 +3889,6 @@ gtk_text_buffer_backspace (GtkTextBuffer *buffer,
   GtkTextIter end;
   gboolean retval = FALSE;
   const PangoLogAttr *attrs;
-  int offset;
   gboolean backspace_deletes_character;
 
   g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), FALSE);
@@ -3906,9 +3902,9 @@ gtk_text_buffer_backspace (GtkTextBuffer *buffer,
   /* For no good reason, attrs is NULL for the empty last line in
    * a buffer. Special case that here. (#156164)
    */
-  if (attrs)
+  if (attrs != NULL)
     {
-      offset = gtk_text_iter_get_line_offset (&start);
+      gint offset = gtk_text_iter_get_line_offset (&start);
       backspace_deletes_character = attrs[offset].backspace_deletes_character;
     }
   else
@@ -4289,24 +4285,23 @@ struct _GtkTextLogAttrCache
 static void
 free_log_attr_cache (GtkTextLogAttrCache *cache)
 {
-  gint i = 0;
-  while (i < ATTR_CACHE_SIZE)
-    {
+  gint i;
+
+  for (i = 0; i < ATTR_CACHE_SIZE; i++)
     g_free (cache->entries[i].attrs);
-      ++i;
-    }
+
   g_slice_free (GtkTextLogAttrCache, cache);
 }
 
 static void
 clear_log_attr_cache (GtkTextLogAttrCache *cache)
 {
-  gint i = 0;
-  while (i < ATTR_CACHE_SIZE)
+  gint i;
+
+  for (i = 0; i < ATTR_CACHE_SIZE; i++)
     {
       g_free (cache->entries[i].attrs);
       cache->entries[i].attrs = NULL;
-      ++i;
     }
 }
 
@@ -4332,7 +4327,7 @@ compute_log_attrs (const GtkTextIter *iter,
 
   g_assert (char_len > 0);
 
-  if (char_lenp)
+  if (char_lenp != NULL)
     *char_lenp = char_len;
 
   attrs = g_new (PangoLogAttr, char_len + 1);
@@ -4371,7 +4366,7 @@ _gtk_text_buffer_get_line_log_attrs (GtkTextBuffer     *buffer,
   if (gtk_text_iter_is_end (anywhere_in_line) &&
       gtk_text_iter_get_line_offset (anywhere_in_line) == 0)
     {
-      if (char_len)
+      if (char_len != NULL)
         *char_len = 0;
       return NULL;
     }
@@ -4395,17 +4390,15 @@ _gtk_text_buffer_get_line_log_attrs (GtkTextBuffer     *buffer,
   cache = priv->log_attr_cache;
   line = gtk_text_iter_get_line (anywhere_in_line);
 
-  i = 0;
-  while (i < ATTR_CACHE_SIZE)
+  for (i = 0; i < ATTR_CACHE_SIZE; i++)
     {
-      if (cache->entries[i].attrs &&
+      if (cache->entries[i].attrs != NULL &&
           cache->entries[i].line == line)
         {
-          if (char_len)
+          if (char_len != NULL)
             *char_len = cache->entries[i].char_len;
           return cache->entries[i].attrs;
         }
-      ++i;
     }
 
   /* Not in cache; open up the first cache entry */
@@ -4418,7 +4411,7 @@ _gtk_text_buffer_get_line_log_attrs (GtkTextBuffer     *buffer,
   cache->entries[0].attrs = compute_log_attrs (anywhere_in_line,
                                                &cache->entries[0].char_len);
 
-  if (char_len)
+  if (char_len != NULL)
     *char_len = cache->entries[0].char_len;
 
   return cache->entries[0].attrs;

gtk/gtktextiter.c

@@ -3059,7 +3059,7 @@ test_log_attrs (const GtkTextIter *iter,
 {
   gint char_len;
   const PangoLogAttr *attrs;
-  int offset;
+  gint offset;
   gboolean result = FALSE;
 
   g_return_val_if_fail (iter != NULL, FALSE);
@@ -3073,10 +3073,9 @@ test_log_attrs (const GtkTextIter *iter,
    * iter is the end iter and the last line is empty.
    *
    * offset may be equal to char_len, since attrs contains an entry
-   * for one past the end
+   * for one past the end.
    */
-  
-  if (attrs && offset <= char_len)
+  if (attrs != NULL && offset <= char_len)
     result = (* func) (attrs, offset, 0, char_len);
 
   return result;
@@ -3090,7 +3089,7 @@ find_line_log_attrs (const GtkTextIter *iter,
 {
   gint char_len;
   const PangoLogAttr *attrs;
-  int offset;
+  gint offset;
   gboolean result = FALSE;
 
   g_return_val_if_fail (iter != NULL, FALSE);
@@ -3101,10 +3100,9 @@ find_line_log_attrs (const GtkTextIter *iter,
   offset = gtk_text_iter_get_line_offset (iter);
   
   /* char_len may be 0 and attrs will be NULL if so, if
-   * iter is the end iter and the last line is empty
+   * iter is the end iter and the last line is empty.
    */
-  
-  if (attrs)
+  if (attrs != NULL)
     result = (* func) (attrs, offset, char_len, found_offset,
                        already_moved_initially);