[PATCH v2 04/13] show: Associate an sprinter with each format

[Austin Clements]

This associates an sprinter constructor with each show format and uses
this to construct the appropriate sprinter.  Currently nothing is done
with this sprinter, but the following patches will weave it through
the layers of notmuch show.
---
 notmuch-client.h |    2 ++
 notmuch-show.c   |    9 +++++++++
 2 files changed, 11 insertions(+)

diff --git a/notmuch-client.h b/notmuch-client.h
index f930798..e4172a2 100644
--- a/notmuch-client.h
+++ b/notmuch-client.h
@@ -66,9 +66,11 @@ typedef GMimeCipherContext notmuch_crypto_context_t;
 #define STRINGIFY_(s) #s
 
 typedef struct mime_node mime_node_t;
+typedef struct sprinter sprinter_t;
 struct notmuch_show_params;
 
 typedef struct notmuch_show_format {
+    sprinter_t *(*new_sprinter) (const void *ctx, FILE *stream);
     const char *message_set_start;
     notmuch_status_t (*part) (const void *ctx,
 			      struct mime_node *node, int indent,
diff --git a/notmuch-show.c b/notmuch-show.c
index d3419e4..d04943f 100644
--- a/notmuch-show.c
+++ b/notmuch-show.c
@@ -20,12 +20,14 @@
 
 #include "notmuch-client.h"
 #include "gmime-filter-reply.h"
+#include "sprinter.h"
 
 static notmuch_status_t
 format_part_text (const void *ctx, mime_node_t *node,
 		  int indent, const notmuch_show_params_t *params);
 
 static const notmuch_show_format_t format_text = {
+    .new_sprinter = sprinter_text_create,
     .part = format_part_text,
 };
 
@@ -34,6 +36,7 @@ format_part_json_entry (const void *ctx, mime_node_t *node,
 			int indent, const notmuch_show_params_t *params);
 
 static const notmuch_show_format_t format_json = {
+    .new_sprinter = sprinter_json_create,
     .message_set_start = "[",
     .part = format_part_json_entry,
     .message_set_sep = ", ",
@@ -46,6 +49,7 @@ format_part_mbox (const void *ctx, mime_node_t *node,
 		  int indent, const notmuch_show_params_t *params);
 
 static const notmuch_show_format_t format_mbox = {
+    .new_sprinter = sprinter_text_create,
     .part = format_part_mbox,
 };
 
@@ -55,6 +59,7 @@ format_part_raw (unused (const void *ctx), mime_node_t *node,
 		 unused (const notmuch_show_params_t *params));
 
 static const notmuch_show_format_t format_raw = {
+    .new_sprinter = sprinter_text_create,
     .part = format_part_raw,
 };
 
@@ -1003,6 +1008,7 @@ notmuch_show_command (void *ctx, unused (int argc), unused (char *argv[]))
     char *query_string;
     int opt_index, ret;
     const notmuch_show_format_t *format = &format_text;
+    sprinter_t *sprinter;
     notmuch_show_params_t params = {
 	.part = -1,
 	.omit_excluded = TRUE,
@@ -1130,6 +1136,9 @@ notmuch_show_command (void *ctx, unused (int argc), unused (char *argv[]))
 	return 1;
     }
 
+    /* Create structure printer. */
+    sprinter = format->new_sprinter(ctx, stdout);
+
     /* If a single message is requested we do not use search_excludes. */
     if (params.part >= 0)
 	ret = do_show_single (ctx, query, format, &params);
-- 
1.7.10