## cr-declaration

cr-declaration

## Synopsis

                        CRStatement;
                        CRDeclaration;
    CRDeclaration *     cr_declaration_new                  (CRStatement *a_statement,
                                                             CRString *a_property,
                                                             CRTerm *a_value);
    CRDeclaration *     cr_declaration_parse_from_buf       (CRStatement *a_statement,
                                                             const guchar *a_str,
                                                             enum CREncoding a_enc);
    CRDeclaration *     cr_declaration_parse_list_from_buf  (const guchar *a_str,
                                                             enum CREncoding a_enc);
    CRDeclaration *     cr_declaration_append               (CRDeclaration *a_this,
                                                             CRDeclaration *a_new);
    CRDeclaration *     cr_declaration_append2              (CRDeclaration *a_this,
                                                             CRString *a_prop,
                                                             CRTerm *a_value);
    CRDeclaration *     cr_declaration_prepend              (CRDeclaration *a_this,
                                                             CRDeclaration *a_new);
    CRDeclaration *     cr_declaration_unlink               (CRDeclaration *a_decl);
    void                cr_declaration_dump                 (CRDeclaration const *a_this,
                                                             FILE *a_fp,
                                                             glong a_indent,
                                                             gboolean a_one_per_line);
    void                cr_declaration_dump_one             (CRDeclaration const *a_this,
                                                             FILE *a_fp,
                                                             glong a_indent);
    gint                cr_declaration_nr_props             (CRDeclaration const *a_this);
    CRDeclaration *     cr_declaration_get_from_list        (CRDeclaration *a_this,
                                                             int itemnr);
    CRDeclaration *     cr_declaration_get_by_prop_name     (CRDeclaration *a_this,
                                                             const guchar *a_str);
    gchar *             cr_declaration_to_string            (CRDeclaration const *a_this,
                                                             gulong a_indent);
    guchar *            cr_declaration_list_to_string       (CRDeclaration const *a_this,
                                                             gulong a_indent);
    guchar *            cr_declaration_list_to_string2      (CRDeclaration const *a_this,
                                                             gulong a_indent,
                                                             gboolean a_one_decl_per_line);
    void                cr_declaration_ref                  (CRDeclaration *a_this);
    gboolean            cr_declaration_unref                (CRDeclaration *a_this);
    void                cr_declaration_destroy              (CRDeclaration *a_this);

## Description

## Details

### CRStatement

    typedef struct {
    	/**
    	 *The type of the statement.
    	 */
    	enum CRStatementType type ;

    	union
    	{
    		CRRuleSet *ruleset ;
    		CRAtImportRule *import_rule ;
    		CRAtMediaRule *media_rule ;
    		CRAtPageRule *page_rule ;
    		CRAtCharsetRule *charset_rule ;
    		CRAtFontFaceRule *font_face_rule ;
    	} kind ;

            /*
             *the specificity of the selector
             *that matched this statement.
             *This is only used by the cascading
             *order determination algorithm.
             */
            gulong specificity ;

            /*
             *the style sheet that contains
             *this css statement.
             */
            CRStyleSheet *parent_sheet ;
    	CRStatement *next ;
    	CRStatement *prev ;

            CRParsingLocation location ;

            /**
             *a custom pointer useable by
             *applications that use libcroco.
             *libcroco itself will never modify
             *this pointer.
             */
            gpointer app_data ;

            /**
             *a custom pointer used
             *by the upper layers of libcroco.
             *application should never use this
             *pointer.
             */
            gpointer croco_data ;
    } CRStatement;

### CRDeclaration

    typedef struct {
    	/**The property.*/
    	CRString *property ;

    	/**The value of the property.*/
    	CRTerm *value ;

    	/*the ruleset that contains this declaration*/
    	CRStatement *parent_statement ;

    	/*the next declaration*/
    	CRDeclaration *next ;

    	/*the previous one declaration*/
    	CRDeclaration *prev ;

    	/*does the declaration have the important keyword ?*/
    	gboolean important ;

    	glong ref_count ;

    	CRParsingLocation location ;
    	/*reserved for future usage*/
    	gpointer rfu0 ;
    	gpointer rfu1 ;
    	gpointer rfu2 ;
    	gpointer rfu3 ;
    } CRDeclaration;

### cr_declaration_new ()

    CRDeclaration *     cr_declaration_new                  (CRStatement *a_statement,
                                                             CRString *a_property,
                                                             CRTerm *a_value);

`a_statement` : | the statement this declaration belongs to. can be NULL.
`a_property` : | the property string of the declaration
`a_value` : | the value expression of the declaration. Constructor of CRDeclaration.
Returns : | the newly built instance of CRDeclaration, or NULL in case of error. The returned CRDeclaration takes ownership of `a_property` and `a_value`. (E.g. cr_declaration_destroy on this CRDeclaration will also free `a_property` and `a_value`.)

### cr_declaration_parse_from_buf ()

    CRDeclaration *     cr_declaration_parse_from_buf       (CRStatement *a_statement,
                                                             const guchar *a_str,
                                                             enum CREncoding a_enc);

Parses a text buffer that contains a css declaration.

`a_statement` : | the parent css2 statement of this this declaration. Must be non NULL and of type RULESET_STMT (must be a ruleset).
`a_str` : | the string that contains the statement.
`a_enc` : | the encoding of a_str.
Returns : | the parsed declaration, or NULL in case of error.

### cr_declaration_parse_list_from_buf ()

    CRDeclaration *     cr_declaration_parse_list_from_buf  (const guchar *a_str,
                                                             enum CREncoding a_enc);

Parses a ';' separated list of properties declaration.

`a_str` : | the input buffer that contains the list of declaration to parse.
`a_enc` : | the encoding of a_str
Returns : | the parsed list of declaration, NULL if parsing failed.

### cr_declaration_append ()

    CRDeclaration *     cr_declaration_append               (CRDeclaration *a_this,
                                                             CRDeclaration *a_new);

Appends a new declaration to the current declarations list.

`a_this` : | the current declaration list.
`a_new` : | the declaration to append.
Returns : | the declaration list with a_new appended to it, or NULL in case of error.

### cr_declaration_append2 ()

    CRDeclaration *     cr_declaration_append2              (CRDeclaration *a_this,
                                                             CRString *a_prop,
                                                             CRTerm *a_value);

Appends a declaration to the current declaration list.

`a_this` : | the current declaration list.
`a_prop` : | the property string of the declaration to append.
`a_value` : | the value of the declaration to append.
Returns : | the list with the new property appended to it, or NULL in case of an error.

### cr_declaration_prepend ()

    CRDeclaration *     cr_declaration_prepend              (CRDeclaration *a_this,
                                                             CRDeclaration *a_new);

prepends a declaration to the current declaration list.

`a_this` : | the current declaration list.
`a_new` : | the declaration to prepend.
Returns : | the list with a_new prepended or NULL in case of error.

### cr_declaration_unlink ()

    CRDeclaration *     cr_declaration_unlink               (CRDeclaration *a_decl);

Unlinks the declaration from the declaration list. case of a successfull completion, NULL otherwise.

`a_decl` : |
Returns : | a pointer to the unlinked declaration in

### cr_declaration_dump ()

    void                cr_declaration_dump                 (CRDeclaration const *a_this,
                                                             FILE *a_fp,
                                                             glong a_indent,
                                                             gboolean a_one_per_line);

Dumps a declaration list to a file.

`a_this` : | the current instance of CRDeclaration.
`a_fp` : | the destination file.
`a_indent` : | the number of indentation white char.
`a_one_per_line` : | whether to put one declaration per line of not .

### cr_declaration_dump_one ()

    void                cr_declaration_dump_one             (CRDeclaration const *a_this,
                                                             FILE *a_fp,
                                                             glong a_indent);

Dumps the first declaration of the declaration list to a file.

`a_this` : | the current instance of CRDeclaration.
`a_fp` : | the destination file.
`a_indent` : | the number of indentation white char.

### cr_declaration_nr_props ()

    gint                cr_declaration_nr_props             (CRDeclaration const *a_this);

`a_this` : | the current instance of CRDeclaration. Return the number of properties in the declaration
Returns : |

### cr_declaration_get_from_list ()

    CRDeclaration *     cr_declaration_get_from_list        (CRDeclaration *a_this,
                                                             int itemnr);

Use an index to get a CRDeclaration from the declaration list.

`a_this` : | the current instance of CRDeclaration.
`itemnr` : | the index into the declaration list.
Returns : | CRDeclaration at position itemnr, if itemnr > number of declarations - 1, it will return NULL.

### cr_declaration_get_by_prop_name ()

    CRDeclaration *     cr_declaration_get_by_prop_name     (CRDeclaration *a_this,
                                                             const guchar *a_str);

Use property name to get a CRDeclaration from the declaration list.

`a_this` : | the current instance of CRDeclaration.
`a_str` : |
Returns : | CRDeclaration with property name a_prop, or NULL if not found.

### cr_declaration_to_string ()

    gchar *             cr_declaration_to_string            (CRDeclaration const *a_this,
                                                             gulong a_indent);

Serializes the declaration into a string

`a_this` : | the current instance of CRDeclaration.
`a_indent` : | the number of indentation white char to put before the actual serialisation.
Returns : | the serialized form the declaration. The caller must free the string using `g_free()`.

### cr_declaration_list_to_string ()

    guchar *            cr_declaration_list_to_string       (CRDeclaration const *a_this,
                                                             gulong a_indent);

Serializes the declaration list into a string

`a_this` : | the current instance of CRDeclaration.
`a_indent` : | the number of indentation white char to put before the actual serialisation.
Returns : |

### cr_declaration_list_to_string2 ()

    guchar *            cr_declaration_list_to_string2      (CRDeclaration const *a_this,
                                                             gulong a_indent,
                                                             gboolean a_one_decl_per_line);

Serializes the declaration list into a string

`a_this` : | the current instance of CRDeclaration.
`a_indent` : | the number of indentation white char
`a_one_decl_per_line` : | whether to output one doc per line or not. to put before the actual serialisation.
Returns : | the serialized form the declararation.

### cr_declaration_ref ()

    void                cr_declaration_ref                  (CRDeclaration *a_this);

Increases the ref count of the current instance of CRDeclaration.

`a_this` : | the current instance of CRDeclaration.

### cr_declaration_unref ()

    gboolean            cr_declaration_unref                (CRDeclaration *a_this);

Decrements the ref count of the current instance of CRDeclaration. If the ref count reaches zero, the current instance of CRDeclaration if destroyed.

`a_this` : | the current instance of CRDeclaration.
Returns : | TRUE if `a_this` was destroyed (ref count reached zero), FALSE otherwise.

### cr_declaration_destroy ()

    void                cr_declaration_destroy              (CRDeclaration *a_this);

Destructor of the declaration list.

`a_this` : | the current instance of CRDeclaration.