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add eval object, evaluating it's args

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This object makes use of the possibility to escape dollar signs in TEXT.
Take the following example in the conkyrc:
| $${downspeed ${gw_iface}}
will be evaluated to (assuming the gw_iface is eth0):
| ${downspeed eth0}
and finally interpreted to print the gateway interface's downspeed rate.
This commit is contained in:
Phil Sutter 2009-03-24 00:27:51 +01:00
parent 12a40fd0a9
commit 2c3d57d841
4 changed files with 31 additions and 0 deletions
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3
ChangeLog
View File

@ -1,3 +1,6 @@
2009-03-24
* Added eval text object to realise double parsing
2009-03-16
* Fix bug with wacky netstat values on startup

10
doc/variables.xml
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@ -585,6 +585,16 @@
<para></para></listitem>
</varlistentry>
<varlistentry>
<term>
<command><option>eval</option></command>
<option>string</option>
</term>
<listitem>
Evalutates given string according to the rules of TEXT interpretation, i.e. parsing any contained text object specifications into their output, any occuring '$$' into a single '$' and so on. The output is then being parsed again.
<para></para></listitem>
</varlistentry>
<varlistentry>
<term>
<command><option>exec</option></command>

17
src/conky.c
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@ -703,6 +703,7 @@ static void free_text_objects(struct text_object *root)
case OBJ_text:
case OBJ_font:
case OBJ_image:
case OBJ_eval:
case OBJ_exec:
case OBJ_execgauge:
case OBJ_execbar:
@ -1412,6 +1413,8 @@ static struct text_object *construct_text_object(const char *s,
obj_be_ifblock_else(ifblock_opaque, obj);
END OBJ(endif, 0)
obj_be_ifblock_endif(ifblock_opaque, obj);
END OBJ(eval, 0)
obj->data.s = strndup(arg ? arg : "", text_buffer_size);
END OBJ(image, 0)
obj->data.s = strndup(arg ? arg : "", text_buffer_size);
#ifdef HAVE_POPEN
@ -3517,6 +3520,20 @@ static void generate_text_internal(char *p, int p_max_size,
}
#endif /* IMLIB2 */
OBJ(eval) {
struct information *tmp_info;
struct text_object subroot, subroot2;
tmp_info = malloc(sizeof(struct information));
memcpy(tmp_info, cur, sizeof(struct information));
parse_conky_vars(&subroot, obj->data.s, p, tmp_info);
DBGP("evaluated '%s' to '%s'", obj->data.s, p);
parse_conky_vars(&subroot2, p, p, tmp_info);
free_text_objects(&subroot);
free_text_objects(&subroot2);
free(tmp_info);
}
OBJ(exec) {
read_exec(obj->data.s, p, text_buffer_size);
remove_deleted_chars(p);

1
src/text_object.h
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@ -91,6 +91,7 @@ enum text_object_type {
OBJ_downspeedgraph,
OBJ_else,
OBJ_endif,
OBJ_eval,
OBJ_image,
OBJ_exec,
OBJ_execi,