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authorPřemysl Janouch <p.janouch@gmail.com>2015-04-17 21:21:30 +0200
committerPřemysl Janouch <p.janouch@gmail.com>2015-04-17 21:26:08 +0200
commit2d91a2771447fa19a8f597eedc8e797b4a2fc6d6 (patch)
tree4a8530b230fb4bfee8809fa707e33b82adff5747
parente5b52fcd76c94f6349cddb0e1872ff8b2109acea (diff)
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degesch: factor out buffer_{previous,next}()
-rw-r--r--degesch.c55
1 files changed, 37 insertions, 18 deletions
diff --git a/degesch.c b/degesch.c
index b15b464..c5debdb 100644
--- a/degesch.c
+++ b/degesch.c
@@ -938,18 +938,45 @@ buffer_activate (struct app_context *ctx, struct buffer *buffer)
refresh_prompt (ctx);
}
-/// Activate the n-th buffer, counting from one
-static bool
-buffer_goto (struct app_context *ctx, int n)
+static struct buffer *
+buffer_at_index (struct app_context *ctx, int n)
{
int i = 0;
LIST_FOR_EACH (struct buffer, iter, ctx->buffers)
if (++i == n)
- {
- buffer_activate (ctx, iter);
- return true;
- }
- return false;
+ return iter;
+ return NULL;
+}
+
+static struct buffer *
+buffer_next (struct app_context *ctx, int count)
+{
+ struct buffer *new_buffer = ctx->current_buffer;
+ while (count-- > 0)
+ if (!(new_buffer = new_buffer->next))
+ new_buffer = ctx->buffers;
+ return new_buffer;
+}
+
+static struct buffer *
+buffer_previous (struct app_context *ctx, int count)
+{
+ struct buffer *new_buffer = ctx->current_buffer;
+ while (count-- > 0)
+ if (!(new_buffer = new_buffer->prev))
+ new_buffer = ctx->buffers_tail;
+ return new_buffer;
+}
+
+static bool
+buffer_goto (struct app_context *ctx, int n)
+{
+ struct buffer *buffer = buffer_at_index (ctx, n);
+ if (!buffer)
+ return false;
+
+ buffer_activate (ctx, buffer);
+ return true;
}
static int
@@ -1375,11 +1402,7 @@ on_readline_previous_buffer (int count, int key)
if (!ctx->current_buffer)
return 0;
- struct buffer *new_buffer = ctx->current_buffer;
- while (count-- > 0)
- if (!(new_buffer = new_buffer->prev))
- new_buffer = ctx->buffers_tail;
- buffer_activate (ctx, new_buffer);
+ buffer_activate (ctx, buffer_previous (ctx, count));
return 0;
}
@@ -1392,11 +1415,7 @@ on_readline_next_buffer (int count, int key)
if (!ctx->current_buffer)
return 0;
- struct buffer *new_buffer = ctx->current_buffer;
- while (count-- > 0)
- if (!(new_buffer = new_buffer->next))
- new_buffer = ctx->buffers;
- buffer_activate (ctx, new_buffer);
+ buffer_activate (ctx, buffer_next (ctx, count));
return 0;
}