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| -rw-r--r-- | src/st/st-theme-node.h | 368 |
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diff --git a/src/st/st-theme-node.h b/src/st/st-theme-node.h new file mode 100644 index 0000000..520e29f --- /dev/null +++ b/src/st/st-theme-node.h @@ -0,0 +1,368 @@ +/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */ +/* + * st-theme-node.h: style information for one node in a tree of themed objects + * + * Copyright 2008-2010 Red Hat, Inc. + * Copyright 2009, 2010 Florian Müllner + * Copyright 2010 Giovanni Campagna + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as + * published by the Free Software Foundation, either version 2.1 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope it will be useful, but WITHOUT ANY + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for + * more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __ST_THEME_NODE_H__ +#define __ST_THEME_NODE_H__ + +#include <clutter/clutter.h> +#include "st-border-image.h" +#include "st-icon-colors.h" +#include "st-shadow.h" + +G_BEGIN_DECLS + +/** + * SECTION:st-theme-node + * @short_description: style information for one node in a tree of themed objects + * + * 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. + * + * Note that pixel measurements take the #StThemeContext:scale-factor into + * account so all values are in physical pixels, as opposed to logical pixels. + * Physical pixels correspond to actor sizes, not necessarily to pixels on + * display devices (eg. when `scale-monitor-framebuffer` is enabled). + */ + +typedef struct _StTheme StTheme; +typedef struct _StThemeContext StThemeContext; + +#define ST_TYPE_THEME_NODE (st_theme_node_get_type ()) +G_DECLARE_FINAL_TYPE (StThemeNode, st_theme_node, ST, THEME_NODE, GObject) + +/** + * StSide: + * @ST_SIDE_TOP: The top side. + * @ST_SIDE_RIGHT: The right side. + * @ST_SIDE_BOTTOM: The bottom side. + * @ST_SIDE_LEFT: The left side. + * + * Used to target a particular side of a #StThemeNode element. + */ +typedef enum { + ST_SIDE_TOP, + ST_SIDE_RIGHT, + ST_SIDE_BOTTOM, + ST_SIDE_LEFT +} StSide; + +/** + * StCorner: + * @ST_CORNER_TOPLEFT: The top-right corner. + * @ST_CORNER_TOPRIGHT: The top-right corner. + * @ST_CORNER_BOTTOMRIGHT: The bottom-right corner. + * @ST_CORNER_BOTTOMLEFT: The bottom-left corner. + * + * Used to target a particular corner of a #StThemeNode element. + */ +typedef enum { + ST_CORNER_TOPLEFT, + ST_CORNER_TOPRIGHT, + ST_CORNER_BOTTOMRIGHT, + ST_CORNER_BOTTOMLEFT +} StCorner; + +/* These are the CSS values; that doesn't mean we have to implement blink... */ +/** + * StTextDecoration: + * @ST_TEXT_DECORATION_: Text is underlined + * @ST_TEXT_DECORATION_OVERLINE: Text is overlined + * @ST_TEXT_DECORATION_LINE_THROUGH: Text is striked out + * @ST_TEXT_DECORATION_BLINK: Text blinks + * + * Flags used to determine the decoration of text. + * + * Not that neither %ST_TEXT_DECORATION_OVERLINE or %ST_TEXT_DECORATION_BLINK + * are implemented, currently. + */ +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; + +/** + * StTextAlign: + * @ST_TEXT_ALIGN_LEFT: Text is aligned at the beginning of the label. + * @ST_TEXT_ALIGN_CENTER: Text is aligned in the middle of the label. + * @ST_TEXT_ALIGN_RIGHT: Text is aligned at the end of the label. + * @ST_GRADIENT_JUSTIFY: Text is justified in the label. + * + * Used to align text in a label. + */ +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; + +/** + * StGradientType: + * @ST_GRADIENT_NONE: No gradient. + * @ST_GRADIENT_VERTICAL: A vertical gradient. + * @ST_GRADIENT_HORIZONTAL: A horizontal gradient. + * @ST_GRADIENT_RADIAL: Lookup the style requested in the icon name. + * + * Used to specify options when rendering gradients. + */ +typedef enum { + ST_GRADIENT_NONE, + ST_GRADIENT_VERTICAL, + ST_GRADIENT_HORIZONTAL, + ST_GRADIENT_RADIAL +} StGradientType; + +/** + * StIconStyle: + * @ST_ICON_STYLE_REQUESTED: Lookup the style requested in the icon name. + * @ST_ICON_STYLE_REGULAR: Try to always load regular icons, even when symbolic + * icon names are given. + * @ST_ICON_STYLE_SYMBOLIC: Try to always load symbolic icons, even when regular + * icon names are given. + * + * Used to specify options when looking up icons. + */ +typedef enum { + ST_ICON_STYLE_REQUESTED, + ST_ICON_STYLE_REGULAR, + ST_ICON_STYLE_SYMBOLIC +} StIconStyle; + +typedef struct _StThemeNodePaintState StThemeNodePaintState; + +struct _StThemeNodePaintState { + StThemeNode *node; + + float alloc_width; + float alloc_height; + + float box_shadow_width; + float box_shadow_height; + + float resource_scale; + + CoglPipeline *box_shadow_pipeline; + CoglPipeline *prerendered_texture; + CoglPipeline *prerendered_pipeline; + CoglPipeline *corner_material[4]; +}; + +StThemeNode *st_theme_node_new (StThemeContext *context, + StThemeNode *parent_node, /* can be null */ + StTheme *theme, /* can be null */ + GType element_type, + const char *element_id, + const char *element_class, + const char *pseudo_class, + const char *inline_style); + +StThemeNode *st_theme_node_get_parent (StThemeNode *node); + +StTheme *st_theme_node_get_theme (StThemeNode *node); + +gboolean st_theme_node_equal (StThemeNode *node_a, StThemeNode *node_b); +guint st_theme_node_hash (StThemeNode *node); + +GType st_theme_node_get_element_type (StThemeNode *node); +const char *st_theme_node_get_element_id (StThemeNode *node); +GStrv st_theme_node_get_element_classes (StThemeNode *node); +GStrv st_theme_node_get_pseudo_classes (StThemeNode *node); + +/* Generic getters ... these are not cached so are less efficient. The other + * reason for adding the more specific version is that we can handle the + * details of the actual CSS rules, which can be complicated, especially + * for fonts + */ +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_time (StThemeNode *node, + const char *property_name, + gboolean inherit, + gdouble *value); +gboolean st_theme_node_lookup_shadow (StThemeNode *node, + const char *property_name, + gboolean inherit, + StShadow **shadow); +gboolean st_theme_node_lookup_url (StThemeNode *node, + const char *property_name, + gboolean inherit, + GFile **file); + +/* Easier-to-use variants of the above, for application-level use */ +void st_theme_node_get_color (StThemeNode *node, + const char *property_name, + ClutterColor *color); +gdouble st_theme_node_get_double (StThemeNode *node, + const char *property_name); +gdouble st_theme_node_get_length (StThemeNode *node, + const char *property_name); +StShadow *st_theme_node_get_shadow (StThemeNode *node, + const char *property_name); +GFile *st_theme_node_get_url (StThemeNode *node, + const char *property_name); + +/* Specific getters for particular properties: cached + */ +void st_theme_node_get_background_color (StThemeNode *node, + ClutterColor *color); +void st_theme_node_get_foreground_color (StThemeNode *node, + ClutterColor *color); +void st_theme_node_get_background_gradient (StThemeNode *node, + StGradientType *type, + ClutterColor *start, + ClutterColor *end); + +GFile *st_theme_node_get_background_image (StThemeNode *node); + +int st_theme_node_get_border_width (StThemeNode *node, + StSide side); +int st_theme_node_get_border_radius (StThemeNode *node, + StCorner corner); +void st_theme_node_get_border_color (StThemeNode *node, + StSide side, + ClutterColor *color); + +int st_theme_node_get_outline_width (StThemeNode *node); +void st_theme_node_get_outline_color (StThemeNode *node, + ClutterColor *color); + +double st_theme_node_get_padding (StThemeNode *node, + StSide side); + +double st_theme_node_get_horizontal_padding (StThemeNode *node); +double st_theme_node_get_vertical_padding (StThemeNode *node); + +double st_theme_node_get_margin (StThemeNode *node, + StSide side); + +int st_theme_node_get_width (StThemeNode *node); +int st_theme_node_get_height (StThemeNode *node); +int st_theme_node_get_min_width (StThemeNode *node); +int st_theme_node_get_min_height (StThemeNode *node); +int st_theme_node_get_max_width (StThemeNode *node); +int st_theme_node_get_max_height (StThemeNode *node); + +int st_theme_node_get_transition_duration (StThemeNode *node); + +StIconStyle st_theme_node_get_icon_style (StThemeNode *node); + +StTextDecoration st_theme_node_get_text_decoration (StThemeNode *node); + +StTextAlign st_theme_node_get_text_align (StThemeNode *node); + +double st_theme_node_get_letter_spacing (StThemeNode *node); + +/* Font rule processing is pretty complicated, so we just hardcode it + * under the standard font/font-family/font-size/etc names. This means + * you can't have multiple separate styled fonts for a single item, + * but that should be OK. + */ +const PangoFontDescription *st_theme_node_get_font (StThemeNode *node); + +gchar *st_theme_node_get_font_features (StThemeNode *node); + +StBorderImage *st_theme_node_get_border_image (StThemeNode *node); +StShadow *st_theme_node_get_box_shadow (StThemeNode *node); +StShadow *st_theme_node_get_text_shadow (StThemeNode *node); + +StShadow *st_theme_node_get_background_image_shadow (StThemeNode *node); + +StIconColors *st_theme_node_get_icon_colors (StThemeNode *node); + +/* Helpers for get_preferred_width()/get_preferred_height() ClutterActor vfuncs */ +void st_theme_node_adjust_for_height (StThemeNode *node, + float *for_height); +void st_theme_node_adjust_preferred_width (StThemeNode *node, + float *min_width_p, + float *natural_width_p); +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); + +/* Helper for allocate() ClutterActor vfunc */ +void st_theme_node_get_content_box (StThemeNode *node, + const ClutterActorBox *allocation, + ClutterActorBox *content_box); +/* Helper for StThemeNodeTransition */ +void st_theme_node_get_paint_box (StThemeNode *node, + const ClutterActorBox *allocation, + ClutterActorBox *paint_box); +/* Helper for background prerendering */ +void st_theme_node_get_background_paint_box (StThemeNode *node, + const ClutterActorBox *allocation, + ClutterActorBox *paint_box); + +gboolean st_theme_node_geometry_equal (StThemeNode *node, + StThemeNode *other); +gboolean st_theme_node_paint_equal (StThemeNode *node, + StThemeNode *other); + +/** + * st_theme_node_paint: (skip) + */ +void st_theme_node_paint (StThemeNode *node, + StThemeNodePaintState *state, + CoglFramebuffer *framebuffer, + const ClutterActorBox *box, + guint8 paint_opacity, + float resource_scale); + +void st_theme_node_invalidate_background_image (StThemeNode *node); +void st_theme_node_invalidate_border_image (StThemeNode *node); + +gchar * st_theme_node_to_string (StThemeNode *node); + +void st_theme_node_paint_state_init (StThemeNodePaintState *state); +void st_theme_node_paint_state_free (StThemeNodePaintState *state); +void st_theme_node_paint_state_copy (StThemeNodePaintState *state, + StThemeNodePaintState *other); +void st_theme_node_paint_state_invalidate (StThemeNodePaintState *state); +gboolean st_theme_node_paint_state_invalidate_for_file (StThemeNodePaintState *state, + GFile *file); + +void st_theme_node_paint_state_set_node (StThemeNodePaintState *state, + StThemeNode *node); + +G_END_DECLS + +#endif /* __ST_THEME_NODE_H__ */ |