st-theme-node

## st-theme-node st-theme-node — style information for one node in a tree of themed objects |

## Synopsis

    enum                StCorner;
    enum                StGradientType;
    enum                StSide;
    enum                StTextAlign;
    enum                StTextDecoration;
                        StTheme;
                        StThemeContext;
                        StThemeNode;
                        StThemeNodeClass;
    void                st_theme_node_adjust_for_height     (StThemeNode *node,
                                                             float *for_height);
    void                st_theme_node_adjust_for_width      (StThemeNode *node,
                                                             float *for_width);
    void                st_theme_node_adjust_preferred_height
                                                            (StThemeNode *node,
                                                             float *min_height_p,
                                                             float *natural_height_p);
    void                st_theme_node_adjust_preferred_width
                                                            (StThemeNode *node,
                                                             float *min_width_p,
                                                             float *natural_width_p);
    void                st_theme_node_copy_cached_paint_state
                                                            (StThemeNode *node,
                                                             StThemeNode *other);
    gboolean            st_theme_node_equal                 (StThemeNode *node_a,
                                                             StThemeNode *node_b);
    gboolean            st_theme_node_geometry_equal        (StThemeNode *node,
                                                             StThemeNode *other);
    void                st_theme_node_get_background_color  (StThemeNode *node,
                                                             ClutterColor *color);
    void                st_theme_node_get_background_gradient
                                                            (StThemeNode *node,
                                                             StGradientType *type,
                                                             ClutterColor *start,
                                                             ClutterColor *end);
    const char *        st_theme_node_get_background_image  (StThemeNode *node);
    StShadow *          st_theme_node_get_background_image_shadow
                                                            (StThemeNode *node);
    void                st_theme_node_get_background_paint_box
                                                            (StThemeNode *node,
                                                             const ClutterActorBox *allocation,
                                                             ClutterActorBox *paint_box);
    void                st_theme_node_get_border_color      (StThemeNode *node,
                                                             StSide side,
                                                             ClutterColor *color);
    StBorderImage *     st_theme_node_get_border_image      (StThemeNode *node);
    int                 st_theme_node_get_border_radius     (StThemeNode *node,
                                                             StCorner corner);
    int                 st_theme_node_get_border_width      (StThemeNode *node,
                                                             StSide side);
    StShadow *          st_theme_node_get_box_shadow        (StThemeNode *node);
    void                st_theme_node_get_color             (StThemeNode *node,
                                                             const char *property_name,
                                                             ClutterColor *color);
    void                st_theme_node_get_content_box       (StThemeNode *node,
                                                             const ClutterActorBox *allocation,
                                                             ClutterActorBox *content_box);
    gdouble             st_theme_node_get_double            (StThemeNode *node,
                                                             const char *property_name);
    const char *        st_theme_node_get_element_class     (StThemeNode *node);
    const char *        st_theme_node_get_element_id        (StThemeNode *node);
    GType               st_theme_node_get_element_type      (StThemeNode *node);
    const PangoFontDescription * st_theme_node_get_font     (StThemeNode *node);
    void                st_theme_node_get_foreground_color  (StThemeNode *node,
                                                             ClutterColor *color);
    int                 st_theme_node_get_height            (StThemeNode *node);
    double              st_theme_node_get_horizontal_padding
                                                            (StThemeNode *node);
    StIconColors *      st_theme_node_get_icon_colors       (StThemeNode *node);
    gdouble             st_theme_node_get_length            (StThemeNode *node,
                                                             const char *property_name);
    int                 st_theme_node_get_max_height        (StThemeNode *node);
    int                 st_theme_node_get_max_width         (StThemeNode *node);
    int                 st_theme_node_get_min_height        (StThemeNode *node);
    int                 st_theme_node_get_min_width         (StThemeNode *node);
    void                st_theme_node_get_outline_color     (StThemeNode *node,
                                                             ClutterColor *color);
    int                 st_theme_node_get_outline_width     (StThemeNode *node);
    double              st_theme_node_get_padding           (StThemeNode *node,
                                                             StSide side);
    void                st_theme_node_get_paint_box         (StThemeNode *node,
                                                             const ClutterActorBox *allocation,
                                                             ClutterActorBox *paint_box);
    StThemeNode *       st_theme_node_get_parent            (StThemeNode *node);
    const char *        st_theme_node_get_pseudo_class      (StThemeNode *node);
    StShadow *          st_theme_node_get_shadow            (StThemeNode *node,
                                                             const char *property_name);
    StTextAlign         st_theme_node_get_text_align        (StThemeNode *node);
    StTextDecoration    st_theme_node_get_text_decoration   (StThemeNode *node);
    StShadow *          st_theme_node_get_text_shadow       (StThemeNode *node);
    StTheme *           st_theme_node_get_theme             (StThemeNode *node);
    int                 st_theme_node_get_transition_duration
                                                            (StThemeNode *node);
    double              st_theme_node_get_vertical_padding  (StThemeNode *node);
    int                 st_theme_node_get_width             (StThemeNode *node);
    gboolean            st_theme_node_lookup_color          (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             ClutterColor *color);
    gboolean            st_theme_node_lookup_double         (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             double *value);
    gboolean            st_theme_node_lookup_length         (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             gdouble *length);
    gboolean            st_theme_node_lookup_shadow         (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             StShadow **shadow);
    StThemeNode *       st_theme_node_new                   (StThemeContext *context,
                                                             StThemeNode *parent_node,
                                                             StTheme *theme,
                                                             GType element_type,
                                                             const char *element_id,
                                                             const char *element_class,
                                                             const char *pseudo_class,
                                                             const char *inline_style);
    void                st_theme_node_paint                 (StThemeNode *node,
                                                             const ClutterActorBox *box,
                                                             guint8 paint_opacity);
    gboolean            st_theme_node_paint_equal           (StThemeNode *node,
                                                             StThemeNode *other);

## Object Hierarchy

      GObject
       +----StTheme

      GObject
       +----StThemeContext

      GObject
       +----StThemeNode

## Properties

      "application-stylesheet"   gchar*                : Read / Write / Construct Only
      "default-stylesheet"       gchar*                : Read / Write / Construct Only
      "theme-stylesheet"         gchar*                : Read / Write / Construct Only

## Signals

      "changed"                                        : Run Last

## Description

A StThemeNode represents the CSS style information (the set of CSS properties) for one node in a tree of themed objects. In typical usage, it represents the style information for a single ClutterActor. A StThemeNode is immutable: attributes such as the CSS classes for the node are passed in at construction. If the attributes of the node or any parent node change, the node should be discarded and a new node created. StThemeNode has generic accessors to look up properties by name and specific accessors for standard CSS properties that add caching and handling of various details of the CSS specification. StThemeNode also has convenience functions to help in implementing a ClutterActor with borders and padding.

## Details

### enum StCorner

    typedef enum {
        ST_CORNER_TOPLEFT,
        ST_CORNER_TOPRIGHT,
        ST_CORNER_BOTTOMRIGHT,
        ST_CORNER_BOTTOMLEFT
    } StCorner;

### enum StGradientType

    typedef enum {
      ST_GRADIENT_NONE,
      ST_GRADIENT_VERTICAL,
      ST_GRADIENT_HORIZONTAL,
      ST_GRADIENT_RADIAL
    } StGradientType;

### enum StSide

    typedef enum {
        ST_SIDE_TOP,
        ST_SIDE_RIGHT,
        ST_SIDE_BOTTOM,
        ST_SIDE_LEFT
    } StSide;

### enum StTextAlign

    typedef enum {
        ST_TEXT_ALIGN_LEFT = PANGO_ALIGN_LEFT,
        ST_TEXT_ALIGN_CENTER = PANGO_ALIGN_CENTER,
        ST_TEXT_ALIGN_RIGHT = PANGO_ALIGN_RIGHT,
        ST_TEXT_ALIGN_JUSTIFY
    } StTextAlign;

### enum StTextDecoration

    typedef enum {
        ST_TEXT_DECORATION_UNDERLINE    = 1 << 0,
        ST_TEXT_DECORATION_OVERLINE     = 1 << 1,
        ST_TEXT_DECORATION_LINE_THROUGH = 1 << 2,
        ST_TEXT_DECORATION_BLINK        = 1 << 3
    } StTextDecoration;

### StTheme

    typedef struct _StTheme StTheme;

### StThemeContext

    typedef struct _StThemeContext StThemeContext;

### StThemeNode

    typedef struct _StThemeNode StThemeNode;

### StThemeNodeClass

    typedef struct _StThemeNodeClass StThemeNodeClass;

### st_theme_node_adjust_for_height ()

    void                st_theme_node_adjust_for_height     (StThemeNode *node,
                                                             float *for_height);

Adjusts a "for height" passed to `clutter_actor_get_preferred_width()` to account for borders and padding. This is a convenience function meant to be called from a `get_preferred_width()` method of a ClutterActor subclass. The value after adjustment is the height available for the actor's content.

`node` : | a StThemeNode
`for_height` : | the "for height" to adjust. [inout]

### st_theme_node_adjust_for_width ()

    void                st_theme_node_adjust_for_width      (StThemeNode *node,
                                                             float *for_width);

Adjusts a "for width" passed to `clutter_actor_get_preferred_height()` to account for borders and padding. This is a convenience function meant to be called from a `get_preferred_height()` method of a ClutterActor subclass. The value after adjustment is the width available for the actor's content.

`node` : | a StThemeNode
`for_width` : | the "for width" to adjust. [inout]

### st_theme_node_adjust_preferred_height ()

    void                st_theme_node_adjust_preferred_height
                                                            (StThemeNode *node,
                                                             float *min_height_p,
                                                             float *natural_height_p);

Adjusts the minimum and natural height computed for an actor by adding on the necessary space for borders and padding and taking into account any minimum or maximum height. This is a convenience function meant to be called from the `get_preferred_height()` method of a ClutterActor subclass

`node` : | a StThemeNode
`min_height_p` : | the minimum height to adjust. [inout][allow-none]
`natural_height_p` : | the natural height to adjust. [inout]

### st_theme_node_adjust_preferred_width ()

    void                st_theme_node_adjust_preferred_width
                                                            (StThemeNode *node,
                                                             float *min_width_p,
                                                             float *natural_width_p);

Adjusts the minimum and natural width computed for an actor by adding on the necessary space for borders and padding and taking into account any minimum or maximum width. This is a convenience function meant to be called from the `get_preferred_width()` method of a ClutterActor subclass

`node` : | a StThemeNode
`min_width_p` : | the minimum width to adjust. [inout][allow-none]
`natural_width_p` : | the natural width to adjust. [inout]

### st_theme_node_copy_cached_paint_state ()

    void                st_theme_node_copy_cached_paint_state
                                                            (StThemeNode *node,
                                                             StThemeNode *other);

Copy cached painting state from `other` to `node`. This function can be used to optimize redrawing cached background images when the style on an element changess in a way that doesn't affect background drawing. This function must only be called if st_theme_node_paint_equal (node, other) returns `TRUE`.

`node` : | a StThemeNode
`other` : | a different StThemeNode

### st_theme_node_equal ()

    gboolean            st_theme_node_equal                 (StThemeNode *node_a,
                                                             StThemeNode *node_b);

Compare two StThemeNodes. Two nodes which compare equal will match the same CSS rules and have the same style properties. However, two nodes that have ended up with identical style properties do not necessarily compare equal. In detail, `node_a` and `node_b` are considered equal iff

- they share the same StTheme and StThemeContext

- they have the same parent

- they have the same element type

- their id, class, pseudo-class and inline-style match

`node_a` : | first StThemeNode
`node_b` : | second StThemeNode
Returns : | `TRUE` if `node_a` equals `node_b`

### st_theme_node_geometry_equal ()

    gboolean            st_theme_node_geometry_equal        (StThemeNode *node,
                                                             StThemeNode *other);

Tests if two theme nodes have the same borders and padding; this can be used to optimize having to relayout when the style applied to a Clutter actor changes colors without changing the geometry.

`node` : | a StThemeNode
`other` : | a different StThemeNode

### st_theme_node_get_background_color ()

    void                st_theme_node_get_background_color  (StThemeNode *node,
                                                             ClutterColor *color);

Gets `node`'s background color.

`node` : | a StThemeNode
`color` : | location to store the color. [out caller-allocates]

### st_theme_node_get_background_gradient ()

    void                st_theme_node_get_background_gradient
                                                            (StThemeNode *node,
                                                             StGradientType *type,
                                                             ClutterColor *start,
                                                             ClutterColor *end);

The `start` and `end` arguments will only be set if `type` is not ST_GRADIENT_NONE.

`node` : | A StThemeNode
`type` : | Type of gradient. [out]
`start` : | Color at start of gradient. [out caller-allocates]
`end` : | Color at end of gradient. [out caller-allocates]

### st_theme_node_get_background_image ()

    const char *        st_theme_node_get_background_image  (StThemeNode *node);

### st_theme_node_get_background_image_shadow ()

    StShadow *          st_theme_node_get_background_image_shadow
                                                            (StThemeNode *node);

Gets the value for the -st-background-image-shadow style property

`node` : | a StThemeNode
Returns : | the node's background image shadow, or `NULL` if node has no such shadow. [transfer none]

### st_theme_node_get_background_paint_box ()

    void                st_theme_node_get_background_paint_box
                                                            (StThemeNode *node,
                                                             const ClutterActorBox *allocation,
                                                             ClutterActorBox *paint_box);

Gets the box used to paint the actor's background, including the area occupied by properties which paint outside the actor's assigned allocation.

`node` : | a StThemeNode
`allocation` : | the box allocated to a ClutterActor
`paint_box` : | computed box occupied when painting the actor's background. [out caller-allocates]

### st_theme_node_get_border_color ()

    void                st_theme_node_get_border_color      (StThemeNode *node,
                                                             StSide side,
                                                             ClutterColor *color);

Gets the color of `node`'s border on `side`

`node` : | a StThemeNode
`side` : | a StSide
`color` : | location to store the color. [out caller-allocates]

### st_theme_node_get_border_image ()

    StBorderImage *     st_theme_node_get_border_image      (StThemeNode *node);

Gets the value for the border-image style property

`node` : | a StThemeNode
Returns : | the border image, or `NULL` if there is no border image. [transfer none]

### st_theme_node_get_border_radius ()

    int                 st_theme_node_get_border_radius     (StThemeNode *node,
                                                             StCorner corner);

### st_theme_node_get_border_width ()

    int                 st_theme_node_get_border_width      (StThemeNode *node,
                                                             StSide side);

### st_theme_node_get_box_shadow ()

    StShadow *          st_theme_node_get_box_shadow        (StThemeNode *node);

Gets the value for the box-shadow style property

`node` : | a StThemeNode
Returns : | the node's shadow, or `NULL` if node has no shadow. [transfer none]

### st_theme_node_get_color ()

    void                st_theme_node_get_color             (StThemeNode *node,
                                                             const char *property_name,
                                                             ClutterColor *color);

Generically looks up a property containing a single color value. When specific getters (like `st_theme_node_get_background_color()`) exist, they should be used instead. They are cached, so more efficient, and have handling for shortcut properties and other details of CSS.

If `property_name` is not found, a warning will be logged and a default color returned.

See also `st_theme_node_lookup_color()`, which provides more options, and lets you handle the case where the theme does not specify the indicated color.

`node` : | a StThemeNode
`property_name` : | The name of the color property
`color` : | location to store the color that was determined. [out caller-allocates]

### st_theme_node_get_content_box ()

    void                st_theme_node_get_content_box       (StThemeNode *node,
                                                             const ClutterActorBox *allocation,
                                                             ClutterActorBox *content_box);

Gets the box within an actor's allocation that contents the content of an actor (excluding borders and padding). This is a convenience function meant to be used from the `allocate()` or `paint()` methods of a ClutterActor subclass.

`node` : | a StThemeNode
`allocation` : | the box allocated to a ClutterAlctor
`content_box` : | computed box occupied by the actor's content. [out caller-allocates]

### st_theme_node_get_double ()

    gdouble             st_theme_node_get_double            (StThemeNode *node,
                                                             const char *property_name);

Generically looks up a property containing a single numeric value without units.

See also `st_theme_node_lookup_double()`, which provides more options, and lets you handle the case where the theme does not specify the indicated value.

`node` : | a StThemeNode
`property_name` : | The name of the numeric property
Returns : | the value found. If `property_name` is not found, a warning will be logged and 0 will be returned.

### st_theme_node_get_element_class ()

    const char *        st_theme_node_get_element_class     (StThemeNode *node);

### st_theme_node_get_element_id ()

    const char *        st_theme_node_get_element_id        (StThemeNode *node);

### st_theme_node_get_element_type ()

    GType               st_theme_node_get_element_type      (StThemeNode *node);

### st_theme_node_get_font ()

    const PangoFontDescription * st_theme_node_get_font     (StThemeNode *node);

### st_theme_node_get_foreground_color ()

    void                st_theme_node_get_foreground_color  (StThemeNode *node,
                                                             ClutterColor *color);

Gets `node`'s foreground color.

`node` : | a StThemeNode
`color` : | location to store the color. [out caller-allocates]

### st_theme_node_get_height ()

    int                 st_theme_node_get_height            (StThemeNode *node);

### st_theme_node_get_horizontal_padding ()

    double              st_theme_node_get_horizontal_padding
                                                            (StThemeNode *node);

Gets the total horizonal padding (left + right padding)

`node` : | a StThemeNode
Returns : | the total horizonal padding in pixels

### st_theme_node_get_icon_colors ()

    StIconColors *      st_theme_node_get_icon_colors       (StThemeNode *node);

Gets the colors that should be used for colorizing symbolic icons according the style of this node.

`node` : | a StThemeNode
Returns : | the icon colors to use for this theme node. [transfer none]

### st_theme_node_get_length ()

    gdouble             st_theme_node_get_length            (StThemeNode *node,
                                                             const char *property_name);

Generically looks up a property containing a single length value. When specific getters (like `st_theme_node_get_border_width()`) exist, they should be used instead. They are cached, so more efficient, and have handling for shortcut properties and other details of CSS.

Unlike `st_theme_node_get_color()` and `st_theme_node_get_double()`, this does not print a warning if the property is not found; it just returns 0.

See also `st_theme_node_lookup_length()`, which provides more options.

`node` : | a StThemeNode
`property_name` : | The name of the length property
Returns : | the length, in pixels, or 0 if the property was not found.

### st_theme_node_get_max_height ()

    int                 st_theme_node_get_max_height        (StThemeNode *node);

### st_theme_node_get_max_width ()

    int                 st_theme_node_get_max_width         (StThemeNode *node);

### st_theme_node_get_min_height ()

    int                 st_theme_node_get_min_height        (StThemeNode *node);

### st_theme_node_get_min_width ()

    int                 st_theme_node_get_min_width         (StThemeNode *node);

### st_theme_node_get_outline_color ()

    void                st_theme_node_get_outline_color     (StThemeNode *node,
                                                             ClutterColor *color);

Gets the color of `node`'s outline.

`node` : | a StThemeNode
`color` : | location to store the color. [out caller-allocates]

### st_theme_node_get_outline_width ()

    int                 st_theme_node_get_outline_width     (StThemeNode *node);

### st_theme_node_get_padding ()

    double              st_theme_node_get_padding           (StThemeNode *node,
                                                             StSide side);

### st_theme_node_get_paint_box ()

    void                st_theme_node_get_paint_box         (StThemeNode *node,
                                                             const ClutterActorBox *allocation,
                                                             ClutterActorBox *paint_box);

Gets the box used to paint the actor, including the area occupied by properties which paint outside the actor's assigned allocation. When painting `node` to an offscreen buffer, this function can be used to determine the necessary size of the buffer.

`node` : | a StThemeNode
`allocation` : | the box allocated to a ClutterActor
`paint_box` : | computed box occupied when painting the actor. [out caller-allocates]

### st_theme_node_get_parent ()

    StThemeNode *       st_theme_node_get_parent            (StThemeNode *node);

Gets the parent themed element node.

`node` : | a StThemeNode
Returns : | the parent StThemeNode, or `NULL` if this is the root node of the tree of theme elements. [transfer none]

### st_theme_node_get_pseudo_class ()

    const char *        st_theme_node_get_pseudo_class      (StThemeNode *node);

### st_theme_node_get_shadow ()

    StShadow *          st_theme_node_get_shadow            (StThemeNode *node,
                                                             const char *property_name);

Generically looks up a property containing a set of shadow values. When specific getters (like `st_theme_node_get_box_shadow()`) exist, they should be used instead. They are cached, so more efficient, and have handling for shortcut properties and other details of CSS.

Like `st_theme_get_length()`, this does not print a warning if the property is not found; it just returns `NULL`

See also `st_theme_node_lookup_shadow()`, which provides more options.

`node` : | a StThemeNode
`property_name` : | The name of the shadow property
Returns : | the shadow, or `NULL` if the property was not found. [transfer full]

### st_theme_node_get_text_align ()

    StTextAlign         st_theme_node_get_text_align        (StThemeNode *node);

### st_theme_node_get_text_decoration ()

    StTextDecoration    st_theme_node_get_text_decoration   (StThemeNode *node);

### st_theme_node_get_text_shadow ()

    StShadow *          st_theme_node_get_text_shadow       (StThemeNode *node);

Gets the value for the text-shadow style property

`node` : | a StThemeNode
Returns : | the node's text-shadow, or `NULL` if node has no text-shadow. [transfer none]

### st_theme_node_get_theme ()

    StTheme *           st_theme_node_get_theme             (StThemeNode *node);

Gets the theme stylesheet set that styles this node

`node` : | a StThemeNode
Returns : | the theme stylesheet set. [transfer none]

### st_theme_node_get_transition_duration ()

    int                 st_theme_node_get_transition_duration
                                                            (StThemeNode *node);

Get the value of the transition-duration property, which specifies the transition time between the previous StThemeNode and `node`.

`node` : | an StThemeNode
Returns : | the node's transition duration in milliseconds

### st_theme_node_get_vertical_padding ()

    double              st_theme_node_get_vertical_padding  (StThemeNode *node);

Gets the total vertical padding (top + bottom padding)

`node` : | a StThemeNode
Returns : | the total vertical padding in pixels

### st_theme_node_get_width ()

    int                 st_theme_node_get_width             (StThemeNode *node);

### st_theme_node_lookup_color ()

    gboolean            st_theme_node_lookup_color          (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             ClutterColor *color);

Generically looks up a property containing a single color value. When specific getters (like `st_theme_node_get_background_color()`) exist, they should be used instead. They are cached, so more efficient, and have handling for shortcut properties and other details of CSS.

See also `st_theme_node_get_color()`, which provides a simpler API.

`node` : | a StThemeNode
`property_name` : | The name of the color property
`inherit` : | if `TRUE`, if a value is not found for the property on the node, then it will be looked up on the parent node, and then on the parent's parent, and so forth. Note that if the property has a value of 'inherit' it will be inherited even if `FALSE` is passed in for `inherit`; this only affects the default behavior for inheritance.
`color` : | location to store the color that was determined. If the property is not found, the value in this location will not be changed. [out caller-allocates]
Returns : | `TRUE` if the property was found in the properties for this theme node (or in the properties of parent nodes when inheriting.)

### st_theme_node_lookup_double ()

    gboolean            st_theme_node_lookup_double         (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             double *value);

Generically looks up a property containing a single numeric value without units.

See also `st_theme_node_get_double()`, which provides a simpler API.

`node` : | a StThemeNode
`property_name` : | The name of the numeric property
`inherit` : | if `TRUE`, if a value is not found for the property on the node, then it will be looked up on the parent node, and then on the parent's parent, and so forth. Note that if the property has a value of 'inherit' it will be inherited even if `FALSE` is passed in for `inherit`; this only affects the default behavior for inheritance.
`value` : | location to store the value that was determined. If the property is not found, the value in this location will not be changed. [out]
Returns : | `TRUE` if the property was found in the properties for this theme node (or in the properties of parent nodes when inheriting.)

### st_theme_node_lookup_length ()

    gboolean            st_theme_node_lookup_length         (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             gdouble *length);

Generically looks up a property containing a single length value. When specific getters (like `st_theme_node_get_border_width()`) exist, they should be used instead. They are cached, so more efficient, and have handling for shortcut properties and other details of CSS.

See also `st_theme_node_get_length()`, which provides a simpler API.

`node` : | a StThemeNode
`property_name` : | The name of the length property
`inherit` : | if `TRUE`, if a value is not found for the property on the node, then it will be looked up on the parent node, and then on the parent's parent, and so forth. Note that if the property has a value of 'inherit' it will be inherited even if `FALSE` is passed in for `inherit`; this only affects the default behavior for inheritance.
`length` : | location to store the length that was determined. If the property is not found, the value in this location will not be changed. The returned length is resolved to pixels. [out]
Returns : | `TRUE` if the property was found in the properties for this theme node (or in the properties of parent nodes when inheriting.)

### st_theme_node_lookup_shadow ()

    gboolean            st_theme_node_lookup_shadow         (StThemeNode *node,
                                                             const char *property_name,
                                                             gboolean inherit,
                                                             StShadow **shadow);

If the property is not found, the value in the shadow variable will not be changed.

Generically looks up a property containing a set of shadow values. When specific getters (like `st_theme_node_get_box_shadow()`) exist, they should be used instead. They are cached, so more efficient, and have handling for shortcut properties and other details of CSS.

See also `st_theme_node_get_shadow()`, which provides a simpler API.

`node` : | a StThemeNode
`property_name` : | The name of the shadow property
`inherit` : | if `TRUE`, if a value is not found for the property on the node, then it will be looked up on the parent node, and then on the parent's parent, and so forth. Note that if the property has a value of 'inherit' it will be inherited even if `FALSE` is passed in for `inherit`; this only affects the default behavior for inheritance.
`shadow` : | location to store the shadow. [out]
Returns : | `TRUE` if the property was found in the properties for this theme node (or in the properties of parent nodes when inheriting.)

### st_theme_node_new ()

    StThemeNode *       st_theme_node_new                   (StThemeContext *context,
                                                             StThemeNode *parent_node,
                                                             StTheme *theme,
                                                             GType element_type,
                                                             const char *element_id,
                                                             const char *element_class,
                                                             const char *pseudo_class,
                                                             const char *inline_style);

Creates a new StThemeNode. Once created, a node is immutable. Of any of the attributes of the node (like the `element_class`) change the node and its child nodes must be destroyed and recreated.

`context` : | the context representing global state for this themed tree
`parent_node` : | the parent node of this node. [allow-none]
`theme` : | a theme (stylesheet set) that overrides the theme inherited from the parent node. [allow-none]
`element_type` : | the type of the GObject represented by this node in the tree (corresponding to an element if we were theming an XML document. `G_TYPE_NONE` means this style was created for the stage actor and matches a selector element name of 'stage'.
`element_id` : | the ID to match CSS rules against. [allow-none]
`element_class` : | a whitespace-separated list of classes to match CSS rules against. [allow-none]
`pseudo_class` : | a whitespace-separated list of pseudo-classes (like 'hover' or 'visited') to match CSS rules against. [allow-none]
Returns : | the theme node. [transfer full]

### st_theme_node_paint ()

    void                st_theme_node_paint                 (StThemeNode *node,
                                                             const ClutterActorBox *box,
                                                             guint8 paint_opacity);

### st_theme_node_paint_equal ()

    gboolean            st_theme_node_paint_equal           (StThemeNode *node,
                                                             StThemeNode *other);

Check if `st_theme_node_paint()` will paint identically for `node` as it does for `other`. Note that in some cases this function may return `TRUE` even if there is no visible difference in the painting.

`node` : | a StThemeNode
`other` : | a different StThemeNode
Returns : | `TRUE` if the two theme nodes paint identically. `FALSE` if the two nodes potentially paint differently.

## Property Details

### The `"application-stylesheet"` property

      "application-stylesheet"   gchar*                : Read / Write / Construct Only

The highest priority stylesheet, representing application-specific styling; this is associated with the CSS "author" stylesheet.

Default value: NULL

### The `"default-stylesheet"` property

      "default-stylesheet"       gchar*                : Read / Write / Construct Only

The lowest priority stylesheet, representing global default styling; this is associated with the CSS "user agent" stylesheet.

Default value: NULL

### The `"theme-stylesheet"` property

      "theme-stylesheet"         gchar*                : Read / Write / Construct Only

The second priority stylesheet, representing theme-specific styling; this is associated with the CSS "user" stylesheet.

Default value: NULL

## Signal Details

### The `"changed"` signal

    void                user_function                      (StThemeContext *stthemecontext,
                                                            gpointer        user_data)           : Run Last