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degesch: make backlog limit configurable

This commit is contained in:
Přemysl Eric Janouch 2016-01-15 03:49:24 +01:00
parent f39e2a4bc8
commit b7c9e8ca23
2 changed files with 36 additions and 11 deletions
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2
NEWS
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@ -10,6 +10,8 @@
* degesch: added a basic last.fm "now playing" plugin
* degesch: backlog limit was made configurable
* Various bugfixes

45
degesch.c
View File

@ -88,9 +88,6 @@ enum
/// Some arbitrary limit for the history file
#define HISTORY_LIMIT 10000
/// How many lines of backlog to store in memory
#define BACKLOG_LIMIT 1000
/// Characters that separate words
#define WORD_BREAKING_CHARS " \f\n\r\t\v"
@ -1547,6 +1544,7 @@ struct app_context
// TODO: make buffer names fully unique like weechat does
struct str_map buffers_by_name; ///< Buffers by name
unsigned backlog_limit; ///< Limit for buffer lines
time_t last_displayed_msg_time; ///< Time of last displayed message
// Terminal:
@ -1616,6 +1614,8 @@ app_context_init (struct app_context *self)
str_map_init (&self->buffers_by_name);
self->buffers_by_name.key_xfrm = tolower_ascii_strxfrm;
// So that we don't lose the logo shortly after startup
self->backlog_limit = 1000;
self->last_displayed_msg_time = time (NULL);
char *encoding = nl_langinfo (CODESET);
@ -1701,6 +1701,7 @@ on_config_show_all_prefixes_change (struct config_item *item)
refresh_prompt (ctx);
}
static void on_config_backlog_limit_change (struct config_item *item);
static void on_config_attribute_change (struct config_item *item);
static void on_config_logging_change (struct config_item *item);
@ -1903,6 +1904,12 @@ static struct config_schema g_config_behaviour[] =
// You can use the -r switch, however that makes `less` very confused
// about line wrapping, and the result is suboptimal.
{ .name = "backlog_limit",
.comment = "Maximum number of lines stored in the backlog",
.type = CONFIG_ITEM_INTEGER,
.validate = config_validate_nonnegative,
.default_ = "1000",
.on_change = on_config_backlog_limit_change },
{ .name = "backlog_helper",
.comment = "Shell command to display a buffer's history",
.type = CONFIG_ITEM_STRING,
@ -2991,6 +2998,29 @@ formatter_flush (struct formatter *self, FILE *stream, bool raw_attributes)
// --- Buffers -----------------------------------------------------------------
static void
buffer_pop_excess_lines (struct app_context *ctx, struct buffer *self)
{
int to_delete = (int) self->lines_count - (int) ctx->backlog_limit;
while (to_delete-- > 0 && self->lines)
{
struct buffer_line *excess = self->lines;
LIST_UNLINK_WITH_TAIL (self->lines, self->lines_tail, excess);
buffer_line_destroy (excess);
self->lines_count--;
}
}
static void
on_config_backlog_limit_change (struct config_item *item)
{
struct app_context *ctx = item->user_data;
ctx->backlog_limit = MAX (item->value.integer, INT_MAX);
LIST_FOR_EACH (struct buffer, iter, ctx->buffers)
buffer_pop_excess_lines (ctx, iter);
}
static void
buffer_update_time (struct app_context *ctx, time_t now)
{
@ -3114,14 +3144,6 @@ log_formatter (struct app_context *ctx,
if (!buffer)
buffer = ctx->global_buffer;
if (buffer->lines_count >= BACKLOG_LIMIT)
{
struct buffer_line *popped = buffer->lines;
LIST_UNLINK_WITH_TAIL (buffer->lines, buffer->lines_tail, popped);
buffer_line_destroy (popped);
buffer->lines_count--;
}
struct buffer_line *line = buffer_line_new ();
line->flags = flags;
line->when = time (NULL);
@ -3130,6 +3152,7 @@ log_formatter (struct app_context *ctx,
line->formatter = xmalloc (sizeof *line->formatter);
*line->formatter = *f;
buffer_pop_excess_lines (ctx, buffer);
LIST_APPEND_WITH_TAIL (buffer->lines, buffer->lines_tail, line);
buffer->lines_count++;