[evolution] EMailFormatter: Simplify context allocation.

[Matthew Barnes <mbarnes src gnome org>]

commit 13f4544dafe211a748b064b86a8af4085d042b2b
Author: Matthew Barnes <mbarnes redhat com>
Date:   Tue Dec 4 14:56:41 2012 -0500

    EMailFormatter: Simplify context allocation.
    
    Replace the create_context() and free_context() class methods with a
    "context_size" class member defaulting to sizeof(EMailFormatterContext).
    
    EMailFormatter will use "context_size" to allocate a zero-filled slab of
    heap memory.  Since EMailFormatterQuote is currently the only thing that
    overrides the "context_size" (to append a "qf_flags" member), let's keep
    this simple.

 em-format/e-mail-formatter-quote.c |   16 +---------------
 em-format/e-mail-formatter.c       |   32 ++++++--------------------------
 em-format/e-mail-formatter.h       |   22 ++++++++++------------
 3 files changed, 17 insertions(+), 53 deletions(-)
---
diff --git a/em-format/e-mail-formatter-quote.c b/em-format/e-mail-formatter-quote.c
index 2468a31..a86dad0 100644
--- a/em-format/e-mail-formatter-quote.c
+++ b/em-format/e-mail-formatter-quote.c
@@ -41,19 +41,6 @@ struct _EMailFormatterQuotePrivate {
 
 static gpointer e_mail_formatter_quote_parent_class = 0;
 
-static EMailFormatterContext *
-mail_formatter_quote_create_context (EMailFormatter *formatter)
-{
-	return g_malloc0 (sizeof (EMailFormatterQuoteContext));
-}
-
-static void
-mail_formatter_quote_free_context (EMailFormatter *formatter,
-                                   EMailFormatterContext *context)
-{
-	g_free ((EMailFormatterQuoteContext *) context);
-}
-
 static void
 mail_formatter_quote_run (EMailFormatter *formatter,
                           EMailFormatterContext *context,
@@ -189,9 +176,8 @@ e_mail_formatter_quote_class_init (EMailFormatterQuoteClass *class)
 	g_type_class_add_private (class, sizeof (EMailFormatterQuotePrivate));
 
 	formatter_class = E_MAIL_FORMATTER_CLASS (class);
+	formatter_class->context_size = sizeof (EMailFormatterQuoteContext);
 	formatter_class->run = mail_formatter_quote_run;
-	formatter_class->create_context = mail_formatter_quote_create_context;
-	formatter_class->free_context = mail_formatter_quote_free_context;
 
 	object_class = G_OBJECT_CLASS (class);
 	object_class->finalize = e_mail_formatter_quote_finalize;
diff --git a/em-format/e-mail-formatter.c b/em-format/e-mail-formatter.c
index 656e08d..ad69c4b 100644
--- a/em-format/e-mail-formatter.c
+++ b/em-format/e-mail-formatter.c
@@ -82,37 +82,20 @@ static gint signals[LAST_SIGNAL];
 static EMailFormatterContext *
 mail_formatter_create_context (EMailFormatter *formatter)
 {
-	EMailFormatterClass *formatter_class;
-
-	formatter_class = E_MAIL_FORMATTER_GET_CLASS (formatter);
+	EMailFormatterClass *class;
 
-	if (formatter_class->create_context) {
-		if (!formatter_class->free_context) {
-			g_warning (
-				"%s implements create_context() but "
-				"does not implement free_context()!",
-				G_OBJECT_TYPE_NAME (formatter));
-		}
+	class = E_MAIL_FORMATTER_GET_CLASS (formatter);
 
-		return formatter_class->create_context (formatter);
-	}
+	g_warn_if_fail (class->context_size >= sizeof (EMailFormatterContext));
 
-	return g_new0 (EMailFormatterContext, 1);
+	return g_malloc0 (class->context_size);
 }
 
 static void
 mail_formatter_free_context (EMailFormatter *formatter,
                              EMailFormatterContext *context)
 {
-	EMailFormatterClass *formatter_class;
-
-	formatter_class = E_MAIL_FORMATTER_GET_CLASS (formatter);
-
-	if (formatter_class->free_context) {
-		formatter_class->free_context (formatter, context);
-	} else {
-		g_free (context);
-	}
+	g_free (context);
 }
 
 static void
@@ -540,11 +523,8 @@ e_mail_formatter_class_init (EMailFormatterClass *class)
 	object_class->finalize = e_mail_formatter_finalize;
 	object_class->constructed = e_mail_formatter_constructed;
 
+	class->context_size = sizeof (EMailFormatterContext);
 	class->run = mail_formatter_run;
-
-	/* EMailFormatter calls these directly */
-	class->create_context = NULL;
-	class->free_context = NULL;
 	class->set_style = mail_formatter_set_style;
 
 	color = &class->colors[E_MAIL_FORMATTER_COLOR_BODY];
diff --git a/em-format/e-mail-formatter.h b/em-format/e-mail-formatter.h
index 9b4e84d..d7e578f 100644
--- a/em-format/e-mail-formatter.h
+++ b/em-format/e-mail-formatter.h
@@ -114,22 +114,20 @@ struct _EMailFormatterClass {
 	/* Colors should apply globally */
 	GdkColor colors[E_MAIL_FORMATTER_NUM_COLOR_TYPES];
 
-	void			(*run)			(EMailFormatter *formatter,
-							 EMailFormatterContext *context,
-							 CamelStream *stream,
-							 GCancellable *cancellable);
+	/* sizeof(EMailFormatterContext) or some derivative struct */
+	gsize context_size;
 
-	EMailFormatterContext *	(*create_context)	(EMailFormatter *formatter);
-
-	void			(*free_context)		(EMailFormatter *formatter,
-							 EMailFormatterContext *context);
+	void		(*run)			(EMailFormatter *formatter,
+						 EMailFormatterContext *context,
+						 CamelStream *stream,
+						 GCancellable *cancellable);
 
-	void			(*set_style)		(EMailFormatter *formatter,
-							 GtkStyle *style,
-							 GtkStateType state);
+	void		(*set_style)		(EMailFormatter *formatter,
+						 GtkStyle *style,
+						 GtkStateType state);
 
 	/* Signals */
-	void			(*need_redraw)		(EMailFormatter *formatter);
+	void		(*need_redraw)		(EMailFormatter *formatter);
 };
 
 GType		e_mail_formatter_get_type	(void);