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reference: Support keyword inheritance. 

Support keyword inheritance by using #inherit expression.
(e.g. #inherit "collections.group.parts.part";)
This commit is contained in:
Jaehyun Cho 2016-07-21 10:33:29 +09:00
parent 04b5206d51
commit 75f33b8f98
1 changed files with 179 additions and 7 deletions
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186
src/lib/reference.c
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@ -12,6 +12,7 @@ typedef struct keyword_s
char *name;
char *desc;
Eina_List *children_list; //Children keyword data list
int ref_cnt; //Reference count
} keyword_data;
typedef struct ref_s
@ -28,6 +29,12 @@ typedef struct ref_s
Evas_Object *layout;
} ref_data;
typedef struct inherit_s
{
keyword_data *derived_keyword; //Derived keyword
char *base_keyword_full_name; //Base keyword's name (e.g. collections.group)
} inherit_data;
static ref_data *g_md = NULL;
/*****************************************************************************/
@ -43,6 +50,9 @@ keyword_data_free(keyword_data *keyword)
{
if (!keyword) return;
keyword->ref_cnt--;
if (keyword->ref_cnt > 0) return;
if (keyword->name)
free(keyword->name);
if (keyword->desc)
@ -329,11 +339,82 @@ end:
return found_keyword;
}
/* Parse keyword's full name into keyword name list.
(e.g. collections.group.parts is parsed into collections -> group -> parts)
Return keyword name list. */
static Eina_List *
keyword_full_name_parse(const char *keyword_full_name)
{
if (!keyword_full_name) return NULL;
Eina_List *keyword_hierarchy = NULL;
int len = strlen(keyword_full_name);
char *keyword_name = NULL;
char *keyword_begin = (char *)keyword_full_name;
char *keyword_end = (char *)keyword_full_name + len;
char *dot = strstr(keyword_full_name, ".");
while (dot)
{
keyword_name = strndup(keyword_begin, (dot - keyword_begin));
keyword_hierarchy = eina_list_append(keyword_hierarchy, keyword_name);
keyword_begin = dot + 1; //Move pointer after ".".
if (keyword_begin >= keyword_end)
break;
dot = strstr(keyword_begin, ".");
}
keyword_hierarchy =
eina_list_append(keyword_hierarchy,
strndup(keyword_begin, (keyword_end - keyword_begin)));
return keyword_hierarchy;
}
/* Find base keyword's full name for keyword inheritance.
inherit_end indicates the ending position of #inherit expression.
Return base keyword's full name. (e.g. collections.group.parts.part) */
static char *
inherit_find(const char *text_begin, const char *text_end, char **inherit_end)
{
if (!text_begin) return NULL;
if (!text_end) return NULL;
char *base_keyword_full_name = NULL;
char *base_keyword_begin = NULL;
char *base_keyword_end = NULL;
base_keyword_begin = strstr(text_begin, "#inherit \"");
if (!base_keyword_begin || (base_keyword_begin > text_end))
return NULL;
base_keyword_begin += 10; //Move pointer after "\"".
base_keyword_end = strstr(base_keyword_begin, "\";");
if (!base_keyword_end || (base_keyword_end > text_end))
return NULL;
base_keyword_end--;
base_keyword_full_name =
strndup((const char *)base_keyword_begin,
(base_keyword_end - base_keyword_begin + 1));
//Indicates the ending position of #inherit expression.
*inherit_end = base_keyword_end + 3; //Move pointer after "\";".
return base_keyword_full_name;
}
static void
keyword_tree_load(keyword_data *keyword_root, char **ptr)
keyword_tree_load_internal(keyword_data *keyword_root, char **ptr,
Eina_List **inherit_list)
{
if (!keyword_root) return;
if (!*ptr) return;
if (!inherit_list) return;
int len = strlen(*ptr);
const char *text_end = *ptr + len;
@ -378,7 +459,7 @@ keyword_tree_load(keyword_data *keyword_root, char **ptr)
keyword_name = strndup(keyword_name_begin,
(keyword_name_end - keyword_name_begin + 1));
if (!keyword_name) break;
(*ptr)++; //Move pointer position after "{".
(*ptr)++; //Move pointer after "{".
//Find keyword description.
char *keyword_desc_begin = NULL;
@ -409,30 +490,120 @@ keyword_tree_load(keyword_data *keyword_root, char **ptr)
free(keyword_name);
break;
}
*ptr = keyword_desc_end + 3; //Move pointer position after "\";".
*ptr = keyword_desc_end + 3; //Move pointer after "\";".
//Create a new keyword data and Append it to children list.
keyword = calloc(1, sizeof(keyword_data));
keyword->name = keyword_name;
keyword->desc = keyword_desc;
keyword->ref_cnt = 1;
//Find the next block regardless of the block type (i.e. "{" or "}").
char *next_block = strstr(*ptr, "{");
if (!next_block || (next_block > block_end))
next_block = block_end;
//Find #inherit expression for keyword inheritance.
inherit_data *inherit = NULL;
char *base_keyword_full_name = NULL;
char *inherit_end = NULL;
base_keyword_full_name = inherit_find(*ptr, next_block, &inherit_end);
if (base_keyword_full_name)
{
inherit = calloc(1, sizeof(inherit_data));
inherit->derived_keyword = keyword;
inherit->base_keyword_full_name = base_keyword_full_name;
*inherit_list = eina_list_append(*inherit_list, inherit);
*ptr = inherit_end;
}
//Set child keyword node recursively.
keyword_tree_load(keyword, ptr);
keyword_tree_load_internal(keyword, ptr, inherit_list);
//Find ending position of keyword block to update pointer.
block_end = strstr(*ptr, "}");
if (!block_end)
{
if (inherit)
{
*inherit_list = eina_list_remove(*inherit_list, inherit);
free(inherit->base_keyword_full_name);
free(inherit);
}
keyword_data_free(keyword);
break;
}
*ptr = block_end + 1; //Move pointer position after "}".
*ptr = block_end + 1; //Move pointer after "}".
keyword_root->children_list =
eina_list_append(keyword_root->children_list, keyword);
}
}
/* Load keywords' names and descriptions into a tree structure. */
static void
keyword_tree_load(keyword_data *keyword_root, char **ptr)
{
if (!keyword_root) return;
if (!*ptr) return;
Eina_List *inherit_list = NULL;
inherit_data *inherit = NULL;
//Load keywords' names and descriptions.
keyword_tree_load_internal(keyword_root, ptr, &inherit_list);
//Update keywords' children lists based on keyword inheritance.
EINA_LIST_FREE(inherit_list, inherit)
{
Eina_List *keyword_hierarchy = NULL;
keyword_data *base_keyword = NULL;
keyword_hierarchy =
keyword_full_name_parse(inherit->base_keyword_full_name);
/* Copy base child keyword to derive child keyword if it is not
overriding keyword. */
base_keyword = keyword_data_find(keyword_root, keyword_hierarchy);
if (base_keyword && (base_keyword->children_list))
{
Eina_List **derived_children_list = NULL;
Eina_List **base_children_list = NULL;
Eina_List *l = NULL;
keyword_data *base_child_keyword = NULL;
derived_children_list = &(inherit->derived_keyword->children_list);
base_children_list = &(base_keyword->children_list);
EINA_LIST_FOREACH(*base_children_list, l, base_child_keyword)
{
keyword_data *overriding_keyword =
keyword_data_find_internal(*derived_children_list,
base_child_keyword->name);
if (!overriding_keyword)
{
*derived_children_list =
eina_list_append(*derived_children_list,
base_child_keyword);
base_child_keyword->ref_cnt++;
}
}
}
char *keyword_hierarchy_name = NULL;
EINA_LIST_FREE(keyword_hierarchy, keyword_hierarchy_name)
{
free(keyword_hierarchy_name);
}
free(inherit->base_keyword_full_name);
free(inherit);
}
}
static void
ref_load(ref_data *md)
{
@ -456,13 +627,14 @@ ref_load(ref_data *md)
md->keyword_root = NULL;
}
//Load keyword data tree from text.
//Create keyword root node.
keyword_data *keyword_root = calloc(1, sizeof(keyword_data));
keyword_root->name = NULL;
keyword_root->desc = NULL;
keyword_root->ref_cnt = 1;
char *ptr = text;
//Load keyword data tree from text.
keyword_tree_load(keyword_root, &ptr);
md->keyword_root = keyword_root;