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+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*- */
+
+/* Marco Theme Rendering */
+
+/* 
+ * Copyright (C) 2001 Havoc Pennington
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef META_THEME_H
+#define META_THEME_H
+
+#include "boxes.h"
+#include "gradient.h"
+#include "common.h"
+#include <gtk/gtk.h>
+
+typedef struct _MetaFrameStyle MetaFrameStyle;
+typedef struct _MetaFrameStyleSet MetaFrameStyleSet;
+typedef struct _MetaDrawOp MetaDrawOp;
+typedef struct _MetaDrawOpList MetaDrawOpList;
+typedef struct _MetaGradientSpec MetaGradientSpec;
+typedef struct _MetaAlphaGradientSpec MetaAlphaGradientSpec; 
+typedef struct _MetaColorSpec MetaColorSpec;
+typedef struct _MetaFrameLayout MetaFrameLayout;
+typedef struct _MetaButtonSpace MetaButtonSpace;
+typedef struct _MetaFrameGeometry MetaFrameGeometry;
+typedef struct _MetaTheme MetaTheme;
+typedef struct _MetaPositionExprEnv MetaPositionExprEnv;
+typedef struct _MetaDrawInfo MetaDrawInfo;
+
+#define META_THEME_ERROR (g_quark_from_static_string ("meta-theme-error"))
+
+typedef enum
+{
+ META_THEME_ERROR_FRAME_GEOMETRY,
+ META_THEME_ERROR_BAD_CHARACTER,
+ META_THEME_ERROR_BAD_PARENS,
+ META_THEME_ERROR_UNKNOWN_VARIABLE,
+ META_THEME_ERROR_DIVIDE_BY_ZERO,
+ META_THEME_ERROR_MOD_ON_FLOAT,
+ META_THEME_ERROR_FAILED
+} MetaThemeError;
+
+/**
+ * Whether a button's size is calculated from the area around it (aspect
+ * sizing) or is given as a fixed height and width in pixels (fixed sizing).
+ *
+ * \bug This could be done away with; see the comment at the top of
+ * MetaFrameLayout.
+ */
+typedef enum
+{
+ META_BUTTON_SIZING_ASPECT,
+ META_BUTTON_SIZING_FIXED,
+ META_BUTTON_SIZING_LAST
+} MetaButtonSizing;
+
+/**
+ * Various parameters used to calculate the geometry of a frame.
+ * They are used inside a MetaFrameStyle.
+ * This corresponds closely to the <frame_geometry> tag in a theme file.
+ *
+ * \bug button_sizing isn't really necessary, because we could easily say
+ * that if button_aspect is zero, the height and width are fixed values.
+ * This would also mean that MetaButtonSizing didn't need to exist, and
+ * save code.
+ **/
+struct _MetaFrameLayout
+{
+ /** Reference count. */
+ int refcount;
+ 
+ /** Size of left side */
+ int left_width;
+ /** Size of right side */
+ int right_width;
+ /** Size of bottom side */
+ int bottom_height;
+ 
+ /** Border of blue title region
+ * \bug (blue?!)
+ **/
+ GtkBorder title_border;
+
+ /** Extra height for inside of title region, above the font height */
+ int title_vertical_pad;
+ 
+ /** Right indent of buttons from edges of frame */
+ int right_titlebar_edge;
+ /** Left indent of buttons from edges of frame */
+ int left_titlebar_edge;
+ 
+ /**
+ * Sizing rule of buttons, either META_BUTTON_SIZING_ASPECT
+ * (in which case button_aspect will be honoured, and
+ * button_width and button_height set from it), or
+ * META_BUTTON_SIZING_FIXED (in which case we read the width
+ * and height directly).
+ */
+ MetaButtonSizing button_sizing;
+
+ /**
+ * Ratio of height/width. Honoured only if
+ * button_sizing==META_BUTTON_SIZING_ASPECT.
+ * Otherwise we figure out the height from the button_border.
+ */
+ double button_aspect;
+ 
+ /** Width of a button; set even when we are using aspect sizing */
+ int button_width;
+
+ /** Height of a button; set even when we are using aspect sizing */
+ int button_height;
+
+ /** Space around buttons */
+ GtkBorder button_border;
+
+ /** scale factor for title text */
+ double title_scale;
+ 
+ /** Whether title text will be displayed */
+ guint has_title : 1;
+
+ /** Whether we should hide the buttons */
+ guint hide_buttons : 1;
+
+ /** Radius of the top left-hand corner; 0 if not rounded */
+ guint top_left_corner_rounded_radius;
+ /** Radius of the top right-hand corner; 0 if not rounded */
+ guint top_right_corner_rounded_radius;
+ /** Radius of the bottom left-hand corner; 0 if not rounded */
+ guint bottom_left_corner_rounded_radius;
+ /** Radius of the bottom right-hand corner; 0 if not rounded */
+ guint bottom_right_corner_rounded_radius;
+};
+
+/**
+ * The computed size of a button (really just a way of tying its
+ * visible and clickable areas together).
+ * The reason for two different rectangles here is Fitts' law & maximized
+ * windows; see bug #97703 for more details.
+ */
+struct _MetaButtonSpace
+{
+ /** The screen area where the button's image is drawn */
+ GdkRectangle visible;
+ /** The screen area where the button can be activated by clicking */
+ GdkRectangle clickable;
+};
+
+/**
+ * Calculated actual geometry of the frame
+ */
+struct _MetaFrameGeometry
+{
+ int left_width;
+ int right_width;
+ int top_height;
+ int bottom_height;
+
+ int width;
+ int height; 
+
+ GdkRectangle title_rect;
+
+ int left_titlebar_edge;
+ int right_titlebar_edge;
+ int top_titlebar_edge;
+ int bottom_titlebar_edge;
+
+ /* used for a memset hack */
+#define ADDRESS_OF_BUTTON_RECTS(fgeom) (((char*)(fgeom)) + G_STRUCT_OFFSET (MetaFrameGeometry, close_rect))
+#define LENGTH_OF_BUTTON_RECTS (G_STRUCT_OFFSET (MetaFrameGeometry, right_right_background) + sizeof (GdkRectangle) - G_STRUCT_OFFSET (MetaFrameGeometry, close_rect))
+ 
+ /* The button rects (if changed adjust memset hack) */
+ MetaButtonSpace close_rect;
+ MetaButtonSpace max_rect;
+ MetaButtonSpace min_rect;
+ MetaButtonSpace menu_rect;
+ MetaButtonSpace shade_rect;
+ MetaButtonSpace above_rect;
+ MetaButtonSpace stick_rect;
+ MetaButtonSpace unshade_rect;
+ MetaButtonSpace unabove_rect;
+ MetaButtonSpace unstick_rect;
+
+#define MAX_MIDDLE_BACKGROUNDS (MAX_BUTTONS_PER_CORNER - 2)
+ GdkRectangle left_left_background;
+ GdkRectangle left_middle_backgrounds[MAX_MIDDLE_BACKGROUNDS];
+ GdkRectangle left_right_background;
+ GdkRectangle right_left_background;
+ GdkRectangle right_middle_backgrounds[MAX_MIDDLE_BACKGROUNDS];
+ GdkRectangle right_right_background;
+ /* End of button rects (if changed adjust memset hack) */
+ 
+ /* Round corners */
+ guint top_left_corner_rounded_radius;
+ guint top_right_corner_rounded_radius;
+ guint bottom_left_corner_rounded_radius;
+ guint bottom_right_corner_rounded_radius;
+};
+
+typedef enum
+{
+ META_IMAGE_FILL_SCALE, /* default, needs to be all-bits-zero for g_new0 */
+ META_IMAGE_FILL_TILE
+} MetaImageFillType;
+
+typedef enum
+{
+ META_COLOR_SPEC_BASIC,
+ META_COLOR_SPEC_GTK,
+ META_COLOR_SPEC_BLEND,
+ META_COLOR_SPEC_SHADE
+} MetaColorSpecType;
+
+typedef enum
+{
+ META_GTK_COLOR_FG,
+ META_GTK_COLOR_BG,
+ META_GTK_COLOR_LIGHT,
+ META_GTK_COLOR_DARK,
+ META_GTK_COLOR_MID,
+ META_GTK_COLOR_TEXT,
+ META_GTK_COLOR_BASE,
+ META_GTK_COLOR_TEXT_AA,
+ META_GTK_COLOR_LAST
+} MetaGtkColorComponent;
+
+struct _MetaColorSpec
+{
+ MetaColorSpecType type;
+ union
+ {
+ struct {
+ GdkColor color;
+ } basic;
+ struct {
+ MetaGtkColorComponent component;
+ GtkStateType state;
+ } gtk;
+ struct {
+ MetaColorSpec *foreground;
+ MetaColorSpec *background;
+ double alpha;
+
+ GdkColor color;
+ } blend;
+ struct {
+ MetaColorSpec *base;
+ double factor;
+
+ GdkColor color;
+ } shade;
+ } data;
+};
+
+struct _MetaGradientSpec
+{
+ MetaGradientType type;
+ GSList *color_specs;
+};
+
+struct _MetaAlphaGradientSpec
+{
+ MetaGradientType type;
+ unsigned char *alphas;
+ int n_alphas;
+};
+
+struct _MetaDrawInfo
+{
+ GdkPixbuf *mini_icon;
+ GdkPixbuf *icon;
+ PangoLayout *title_layout;
+ int title_layout_width;
+ int title_layout_height;
+ const MetaFrameGeometry *fgeom;
+};
+
+/**
+ * A drawing operation in our simple vector drawing language.
+ */
+typedef enum
+{
+ /** Basic drawing-- line */
+ META_DRAW_LINE,
+ /** Basic drawing-- rectangle */
+ META_DRAW_RECTANGLE,
+ /** Basic drawing-- arc */
+ META_DRAW_ARC,
+
+ /** Clip to a rectangle */
+ META_DRAW_CLIP,
+ 
+ /* Texture thingies */
+
+ /** Just a filled rectangle with alpha */
+ META_DRAW_TINT,
+ META_DRAW_GRADIENT,
+ META_DRAW_IMAGE,
+ 
+ /** GTK theme engine stuff */
+ META_DRAW_GTK_ARROW,
+ META_DRAW_GTK_BOX,
+ META_DRAW_GTK_VLINE,
+
+ /** App's window icon */
+ META_DRAW_ICON,
+ /** App's window title */
+ META_DRAW_TITLE,
+ /** a draw op list */
+ META_DRAW_OP_LIST,
+ /** tiled draw op list */
+ META_DRAW_TILE
+} MetaDrawType;
+
+typedef enum
+{
+ POS_TOKEN_INT,
+ POS_TOKEN_DOUBLE,
+ POS_TOKEN_OPERATOR,
+ POS_TOKEN_VARIABLE,
+ POS_TOKEN_OPEN_PAREN,
+ POS_TOKEN_CLOSE_PAREN
+} PosTokenType;
+
+typedef enum
+{
+ POS_OP_NONE,
+ POS_OP_ADD,
+ POS_OP_SUBTRACT,
+ POS_OP_MULTIPLY,
+ POS_OP_DIVIDE,
+ POS_OP_MOD,
+ POS_OP_MAX,
+ POS_OP_MIN
+} PosOperatorType;
+
+/**
+ * A token, as output by the tokeniser.
+ *
+ * \ingroup tokenizer
+ */
+typedef struct
+{
+ PosTokenType type;
+
+ union
+ {
+ struct {
+ int val;
+ } i;
+
+ struct {
+ double val;
+ } d;
+
+ struct {
+ PosOperatorType op;
+ } o;
+
+ struct {
+ char *name;
+ GQuark name_quark;
+ } v;
+
+ } d;
+} PosToken;
+
+/**
+ * A computed expression in our simple vector drawing language.
+ * While it appears to take the form of a tree, this is actually
+ * merely a list; concerns such as precedence of operators are
+ * currently recomputed on every recalculation.
+ *
+ * Created by meta_draw_spec_new(), destroyed by meta_draw_spec_free().
+ * pos_eval() fills this with ...FIXME. Are tokens a tree or a list?
+ * \ingroup parser
+ */
+typedef struct _MetaDrawSpec
+{
+ /**
+ * If this spec is constant, this is the value of the constant;
+ * otherwise it is zero.
+ */
+ int value;
+ 
+ /** A list of tokens in the expression. */
+ PosToken *tokens;
+
+ /** How many tokens are in the tokens list. */
+ int n_tokens;
+
+ /** Does the expression contain any variables? */
+ gboolean constant : 1;
+} MetaDrawSpec;
+
+/**
+ * A single drawing operation in our simple vector drawing language.
+ */
+struct _MetaDrawOp
+{
+ MetaDrawType type;
+
+ /* Positions are strings because they can be expressions */
+ union
+ {
+ struct {
+ MetaColorSpec *color_spec;
+ int dash_on_length;
+ int dash_off_length;
+ int width;
+ MetaDrawSpec *x1;
+ MetaDrawSpec *y1;
+ MetaDrawSpec *x2;
+ MetaDrawSpec *y2;
+ } line;
+
+ struct {
+ MetaColorSpec *color_spec;
+ gboolean filled;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } rectangle;
+
+ struct {
+ MetaColorSpec *color_spec;
+ gboolean filled;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ double start_angle;
+ double extent_angle;
+ } arc;
+
+ struct {
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } clip;
+ 
+ struct {
+ MetaColorSpec *color_spec;
+ MetaAlphaGradientSpec *alpha_spec;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } tint;
+
+ struct {
+ MetaGradientSpec *gradient_spec;
+ MetaAlphaGradientSpec *alpha_spec;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } gradient;
+
+ struct {
+ MetaColorSpec *colorize_spec;
+ MetaAlphaGradientSpec *alpha_spec;
+ GdkPixbuf *pixbuf;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+
+ guint32 colorize_cache_pixel;
+ GdkPixbuf *colorize_cache_pixbuf;
+ MetaImageFillType fill_type;
+ unsigned int vertical_stripes : 1;
+ unsigned int horizontal_stripes : 1;
+ } image;
+ 
+ struct {
+ GtkStateType state;
+ GtkShadowType shadow;
+ GtkArrowType arrow;
+ gboolean filled;
+
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } gtk_arrow;
+
+ struct {
+ GtkStateType state;
+ GtkShadowType shadow;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } gtk_box;
+
+ struct {
+ GtkStateType state;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y1;
+ MetaDrawSpec *y2; 
+ } gtk_vline;
+
+ struct {
+ MetaAlphaGradientSpec *alpha_spec;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ MetaImageFillType fill_type;
+ } icon;
+
+ struct {
+ MetaColorSpec *color_spec;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ } title;
+
+ struct {
+ MetaDrawOpList *op_list;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ } op_list;
+
+ struct {
+ MetaDrawOpList *op_list;
+ MetaDrawSpec *x;
+ MetaDrawSpec *y;
+ MetaDrawSpec *width;
+ MetaDrawSpec *height;
+ MetaDrawSpec *tile_xoffset;
+ MetaDrawSpec *tile_yoffset;
+ MetaDrawSpec *tile_width;
+ MetaDrawSpec *tile_height;
+ } tile;
+ 
+ } data;
+};
+
+/**
+ * A list of MetaDrawOp objects. Maintains a reference count.
+ * Grows as necessary and allows the allocation of unused spaces
+ * to keep reallocations to a minimum.
+ *
+ * \bug Do we really win anything from not using the equivalent
+ * GLib structures?
+ */
+struct _MetaDrawOpList
+{
+ int refcount;
+ MetaDrawOp **ops;
+ int n_ops;
+ int n_allocated;
+};
+
+typedef enum
+{
+ META_BUTTON_STATE_NORMAL,
+ META_BUTTON_STATE_PRESSED,
+ META_BUTTON_STATE_PRELIGHT,
+ META_BUTTON_STATE_LAST
+} MetaButtonState;
+
+typedef enum
+{
+ /* Ordered so that background is drawn first */
+ META_BUTTON_TYPE_LEFT_LEFT_BACKGROUND,
+ META_BUTTON_TYPE_LEFT_MIDDLE_BACKGROUND,
+ META_BUTTON_TYPE_LEFT_RIGHT_BACKGROUND,
+ META_BUTTON_TYPE_RIGHT_LEFT_BACKGROUND,
+ META_BUTTON_TYPE_RIGHT_MIDDLE_BACKGROUND,
+ META_BUTTON_TYPE_RIGHT_RIGHT_BACKGROUND,
+ META_BUTTON_TYPE_CLOSE,
+ META_BUTTON_TYPE_MAXIMIZE,
+ META_BUTTON_TYPE_MINIMIZE,
+ META_BUTTON_TYPE_MENU,
+ META_BUTTON_TYPE_SHADE,
+ META_BUTTON_TYPE_ABOVE,
+ META_BUTTON_TYPE_STICK,
+ META_BUTTON_TYPE_UNSHADE,
+ META_BUTTON_TYPE_UNABOVE,
+ META_BUTTON_TYPE_UNSTICK,
+ META_BUTTON_TYPE_LAST
+} MetaButtonType;
+
+typedef enum
+{
+ META_MENU_ICON_TYPE_CLOSE,
+ META_MENU_ICON_TYPE_MAXIMIZE,
+ META_MENU_ICON_TYPE_UNMAXIMIZE,
+ META_MENU_ICON_TYPE_MINIMIZE,
+ META_MENU_ICON_TYPE_LAST
+} MetaMenuIconType;
+
+typedef enum
+{
+ /* Listed in the order in which the textures are drawn.
+ * (though this only matters for overlaps of course.)
+ * Buttons are drawn after the frame textures.
+ *
+ * On the corners, horizontal pieces are arbitrarily given the
+ * corner area:
+ *
+ * ===== |====
+ * | |
+ * | rather than |
+ *
+ */
+ 
+ /* entire frame */
+ META_FRAME_PIECE_ENTIRE_BACKGROUND,
+ /* entire titlebar background */
+ META_FRAME_PIECE_TITLEBAR,
+ /* portion of the titlebar background inside the titlebar
+ * background edges
+ */
+ META_FRAME_PIECE_TITLEBAR_MIDDLE,
+ /* left end of titlebar */
+ META_FRAME_PIECE_LEFT_TITLEBAR_EDGE,
+ /* right end of titlebar */
+ META_FRAME_PIECE_RIGHT_TITLEBAR_EDGE,
+ /* top edge of titlebar */
+ META_FRAME_PIECE_TOP_TITLEBAR_EDGE,
+ /* bottom edge of titlebar */
+ META_FRAME_PIECE_BOTTOM_TITLEBAR_EDGE,
+ /* render over title background (text area) */
+ META_FRAME_PIECE_TITLE,
+ /* left edge of the frame */
+ META_FRAME_PIECE_LEFT_EDGE,
+ /* right edge of the frame */
+ META_FRAME_PIECE_RIGHT_EDGE,
+ /* bottom edge of the frame */
+ META_FRAME_PIECE_BOTTOM_EDGE,
+ /* place over entire frame, after drawing everything else */
+ META_FRAME_PIECE_OVERLAY,
+ /* Used to get size of the enum */
+ META_FRAME_PIECE_LAST
+} MetaFramePiece;
+
+#define N_GTK_STATES 5
+
+/**
+ * How to draw a frame in a particular state (say, a focussed, non-maximised,
+ * resizable frame). This corresponds closely to the <frame_style> tag
+ * in a theme file.
+ */
+struct _MetaFrameStyle
+{
+ /** Reference count. */
+ int refcount;
+ /**
+ * Parent style.
+ * Settings which are unspecified here will be taken from there.
+ */
+ MetaFrameStyle *parent;
+ /** Operations for drawing each kind of button in each state. */
+ MetaDrawOpList *buttons[META_BUTTON_TYPE_LAST][META_BUTTON_STATE_LAST];
+ /** Operations for drawing each piece of the frame. */
+ MetaDrawOpList *pieces[META_FRAME_PIECE_LAST];
+ /**
+ * Details such as the height and width of each edge, the corner rounding,
+ * and the aspect ratio of the buttons.
+ */
+ MetaFrameLayout *layout;
+ /**
+ * Background colour of the window. Only present in theme formats
+ * 2 and above. Can be NULL to use the standard GTK theme engine.
+ */
+ MetaColorSpec *window_background_color;
+ /**
+ * Transparency of the window background. 0=transparent; 255=opaque.
+ */
+ guint8 window_background_alpha;
+};
+
+/* Kinds of frame...
+ * 
+ * normal -> noresize / vert only / horz only / both
+ * focused / unfocused
+ * max -> focused / unfocused
+ * shaded -> focused / unfocused
+ * max/shaded -> focused / unfocused
+ *
+ * so 4 states with 8 sub-states in one, 2 sub-states in the other 3,
+ * meaning 14 total
+ *
+ * 14 window states times 7 or 8 window types. Except some
+ * window types never get a frame so that narrows it down a bit.
+ * 
+ */
+typedef enum
+{
+ META_FRAME_STATE_NORMAL,
+ META_FRAME_STATE_MAXIMIZED,
+ META_FRAME_STATE_SHADED,
+ META_FRAME_STATE_MAXIMIZED_AND_SHADED,
+ META_FRAME_STATE_LAST
+} MetaFrameState;
+
+typedef enum
+{
+ META_FRAME_RESIZE_NONE,
+ META_FRAME_RESIZE_VERTICAL,
+ META_FRAME_RESIZE_HORIZONTAL,
+ META_FRAME_RESIZE_BOTH,
+ META_FRAME_RESIZE_LAST
+} MetaFrameResize;
+
+typedef enum
+{
+ META_FRAME_FOCUS_NO,
+ META_FRAME_FOCUS_YES,
+ META_FRAME_FOCUS_LAST
+} MetaFrameFocus;
+
+/**
+ * How to draw frames at different times: when it's maximised or not, shaded
+ * or not, when it's focussed or not, and (for non-maximised windows), when
+ * it can be horizontally or vertically resized, both, or neither.
+ * Not all window types actually get a frame.
+ *
+ * A theme contains one of these objects for each type of window (each
+ * MetaFrameType), that is, normal, dialogue (modal and non-modal), etc.
+ *
+ * This corresponds closely to the <frame_style_set> tag in a theme file.
+ */
+struct _MetaFrameStyleSet
+{
+ int refcount;
+ MetaFrameStyleSet *parent;
+ MetaFrameStyle *normal_styles[META_FRAME_RESIZE_LAST][META_FRAME_FOCUS_LAST];
+ MetaFrameStyle *maximized_styles[META_FRAME_FOCUS_LAST];
+ MetaFrameStyle *shaded_styles[META_FRAME_RESIZE_LAST][META_FRAME_FOCUS_LAST];
+ MetaFrameStyle *maximized_and_shaded_styles[META_FRAME_FOCUS_LAST];
+};
+
+/**
+ * A theme. This is a singleton class which groups all settings from a theme
+ * on disk together.
+ *
+ * \bug It is rather useless to keep the metadata fields in core, I think.
+ */
+struct _MetaTheme
+{
+ /** Name of the theme (on disk), e.g. "Crux" */
+ char *name;
+ /** Path to the files associated with the theme */
+ char *dirname;
+ /**
+ * Filename of the XML theme file.
+ * \bug Kept lying around for no discernable reason.
+ */
+ char *filename;
+ /** Metadata: Human-readable name of the theme. */
+ char *readable_name;
+ /** Metadata: Author of the theme. */
+ char *author;
+ /** Metadata: Copyright holder. */
+ char *copyright;
+ /** Metadata: Date of the theme. */
+ char *date;
+ /** Metadata: Description of the theme. */
+ char *description;
+ /** Version of the theme format. Older versions cannot use the features
+ * of newer versions even if they think they can (this is to allow forward
+ * and backward compatibility.
+ */
+ guint format_version;
+
+ /** Symbol table of integer constants. */
+ GHashTable *integer_constants;
+ /** Symbol table of float constants. */
+ GHashTable *float_constants;
+ /**
+ * Symbol table of colour constants (hex triples, and triples
+ * plus alpha).
+ * */
+ GHashTable *color_constants;
+ GHashTable *images_by_filename;
+ GHashTable *layouts_by_name;
+ GHashTable *draw_op_lists_by_name;
+ GHashTable *styles_by_name;
+ GHashTable *style_sets_by_name;
+ MetaFrameStyleSet *style_sets_by_type[META_FRAME_TYPE_LAST];
+
+ GQuark quark_width;
+ GQuark quark_height;
+ GQuark quark_object_width;
+ GQuark quark_object_height;
+ GQuark quark_left_width;
+ GQuark quark_right_width;
+ GQuark quark_top_height;
+ GQuark quark_bottom_height;
+ GQuark quark_mini_icon_width;
+ GQuark quark_mini_icon_height;
+ GQuark quark_icon_width;
+ GQuark quark_icon_height;
+ GQuark quark_title_width;
+ GQuark quark_title_height;
+};
+
+struct _MetaPositionExprEnv
+{
+ MetaRectangle rect;
+ /* size of an object being drawn, if it has a natural size */
+ int object_width;
+ int object_height;
+ /* global object sizes, always available */
+ int left_width;
+ int right_width;
+ int top_height;
+ int bottom_height;
+ int title_width;
+ int title_height;
+ int mini_icon_width;
+ int mini_icon_height;
+ int icon_width;
+ int icon_height;
+ /* Theme so we can look up constants */
+ MetaTheme *theme;
+};
+
+MetaFrameLayout* meta_frame_layout_new (void);
+MetaFrameLayout* meta_frame_layout_copy (const MetaFrameLayout *src);
+void meta_frame_layout_ref (MetaFrameLayout *layout);
+void meta_frame_layout_unref (MetaFrameLayout *layout);
+void meta_frame_layout_get_borders (const MetaFrameLayout *layout,
+ int text_height,
+ MetaFrameFlags flags,
+ int *top_height,
+ int *bottom_height,
+ int *left_width,
+ int *right_width);
+void meta_frame_layout_calc_geometry (const MetaFrameLayout *layout,
+ int text_height,
+ MetaFrameFlags flags,
+ int client_width,
+ int client_height,
+ const MetaButtonLayout *button_layout,
+ MetaFrameGeometry *fgeom,
+ MetaTheme *theme);
+
+gboolean meta_frame_layout_validate (const MetaFrameLayout *layout,
+ GError **error);
+
+gboolean meta_parse_position_expression (MetaDrawSpec *spec,
+ const MetaPositionExprEnv *env,
+ int *x_return,
+ int *y_return,
+ GError **err);
+gboolean meta_parse_size_expression (MetaDrawSpec *spec,
+ const MetaPositionExprEnv *env,
+ int *val_return,
+ GError **err);
+
+MetaDrawSpec* meta_draw_spec_new (MetaTheme *theme,
+ const char *expr,
+ GError **error);
+void meta_draw_spec_free (MetaDrawSpec *spec);
+
+MetaColorSpec* meta_color_spec_new (MetaColorSpecType type);
+MetaColorSpec* meta_color_spec_new_from_string (const char *str,
+ GError **err);
+MetaColorSpec* meta_color_spec_new_gtk (MetaGtkColorComponent component,
+ GtkStateType state);
+void meta_color_spec_free (MetaColorSpec *spec);
+void meta_color_spec_render (MetaColorSpec *spec,
+ GtkWidget *widget,
+ GdkColor *color);
+
+
+MetaDrawOp* meta_draw_op_new (MetaDrawType type);
+void meta_draw_op_free (MetaDrawOp *op);
+void meta_draw_op_draw (const MetaDrawOp *op,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ const MetaDrawInfo *info,
+ /* logical region being drawn */
+ MetaRectangle logical_region);
+
+void meta_draw_op_draw_with_style (const MetaDrawOp *op,
+ GtkStyle *style_gtk,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ const MetaDrawInfo *info,
+ /* logical region being drawn */
+ MetaRectangle logical_region);
+
+MetaDrawOpList* meta_draw_op_list_new (int n_preallocs);
+void meta_draw_op_list_ref (MetaDrawOpList *op_list);
+void meta_draw_op_list_unref (MetaDrawOpList *op_list);
+void meta_draw_op_list_draw (const MetaDrawOpList *op_list,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ const MetaDrawInfo *info,
+ MetaRectangle rect);
+void meta_draw_op_list_draw_with_style (const MetaDrawOpList *op_list,
+ GtkStyle *style_gtk,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ const MetaDrawInfo *info,
+ MetaRectangle rect);
+void meta_draw_op_list_append (MetaDrawOpList *op_list,
+ MetaDrawOp *op);
+gboolean meta_draw_op_list_validate (MetaDrawOpList *op_list,
+ GError **error);
+gboolean meta_draw_op_list_contains (MetaDrawOpList *op_list,
+ MetaDrawOpList *child);
+
+MetaGradientSpec* meta_gradient_spec_new (MetaGradientType type);
+void meta_gradient_spec_free (MetaGradientSpec *desc);
+GdkPixbuf* meta_gradient_spec_render (const MetaGradientSpec *desc,
+ GtkWidget *widget,
+ int width,
+ int height);
+gboolean meta_gradient_spec_validate (MetaGradientSpec *spec,
+ GError **error);
+
+MetaAlphaGradientSpec* meta_alpha_gradient_spec_new (MetaGradientType type,
+ int n_alphas);
+void meta_alpha_gradient_spec_free (MetaAlphaGradientSpec *spec);
+
+
+MetaFrameStyle* meta_frame_style_new (MetaFrameStyle *parent);
+void meta_frame_style_ref (MetaFrameStyle *style);
+void meta_frame_style_unref (MetaFrameStyle *style);
+
+void meta_frame_style_draw (MetaFrameStyle *style,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ int x_offset,
+ int y_offset,
+ const GdkRectangle *clip,
+ const MetaFrameGeometry *fgeom,
+ int client_width,
+ int client_height,
+ PangoLayout *title_layout,
+ int text_height,
+ MetaButtonState button_states[META_BUTTON_TYPE_LAST],
+ GdkPixbuf *mini_icon,
+ GdkPixbuf *icon);
+
+
+void meta_frame_style_draw_with_style (MetaFrameStyle *style,
+ GtkStyle *style_gtk,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ int x_offset,
+ int y_offset,
+ const GdkRectangle *clip,
+ const MetaFrameGeometry *fgeom,
+ int client_width,
+ int client_height,
+ PangoLayout *title_layout,
+ int text_height,
+ MetaButtonState button_states[META_BUTTON_TYPE_LAST],
+ GdkPixbuf *mini_icon,
+ GdkPixbuf *icon);
+
+
+gboolean meta_frame_style_validate (MetaFrameStyle *style,
+ guint current_theme_version,
+ GError **error);
+
+MetaFrameStyleSet* meta_frame_style_set_new (MetaFrameStyleSet *parent);
+void meta_frame_style_set_ref (MetaFrameStyleSet *style_set);
+void meta_frame_style_set_unref (MetaFrameStyleSet *style_set);
+
+gboolean meta_frame_style_set_validate (MetaFrameStyleSet *style_set,
+ GError **error);
+
+MetaTheme* meta_theme_get_current (void);
+void meta_theme_set_current (const char *name,
+ gboolean force_reload);
+
+MetaTheme* meta_theme_new (void);
+void meta_theme_free (MetaTheme *theme);
+gboolean meta_theme_validate (MetaTheme *theme,
+ GError **error);
+GdkPixbuf* meta_theme_load_image (MetaTheme *theme,
+ const char *filename,
+ guint size_of_theme_icons,
+ GError **error);
+
+MetaFrameStyle* meta_theme_get_frame_style (MetaTheme *theme,
+ MetaFrameType type,
+ MetaFrameFlags flags);
+
+double meta_theme_get_title_scale (MetaTheme *theme,
+ MetaFrameType type,
+ MetaFrameFlags flags);
+
+void meta_theme_draw_frame (MetaTheme *theme,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ int x_offset,
+ int y_offset,
+ MetaFrameType type,
+ MetaFrameFlags flags,
+ int client_width,
+ int client_height,
+ PangoLayout *title_layout,
+ int text_height,
+ const MetaButtonLayout *button_layout,
+ MetaButtonState button_states[META_BUTTON_TYPE_LAST],
+ GdkPixbuf *mini_icon,
+ GdkPixbuf *icon);
+
+void meta_theme_draw_frame_by_name (MetaTheme *theme,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ int x_offset,
+ int y_offset,
+ const gchar *style_name,
+ MetaFrameFlags flags,
+ int client_width,
+ int client_height,
+ PangoLayout *title_layout,
+ int text_height,
+ const MetaButtonLayout *button_layout,
+ MetaButtonState button_states[META_BUTTON_TYPE_LAST],
+ GdkPixbuf *mini_icon,
+ GdkPixbuf *icon);
+
+void meta_theme_draw_frame_with_style (MetaTheme *theme,
+ GtkStyle *style_gtk,
+ GtkWidget *widget,
+ GdkDrawable *drawable,
+ const GdkRectangle *clip,
+ int x_offset,
+ int y_offset,
+ MetaFrameType type,
+ MetaFrameFlags flags,
+ int client_width,
+ int client_height,
+ PangoLayout *title_layout,
+ int text_height,
+ const MetaButtonLayout *button_layout,
+ MetaButtonState button_states[META_BUTTON_TYPE_LAST],
+ GdkPixbuf *mini_icon,
+ GdkPixbuf *icon);
+
+void meta_theme_get_frame_borders (MetaTheme *theme,
+ MetaFrameType type,
+ int text_height,
+ MetaFrameFlags flags,
+ int *top_height,
+ int *bottom_height,
+ int *left_width,
+ int *right_width);
+void meta_theme_calc_geometry (MetaTheme *theme,
+ MetaFrameType type,
+ int text_height,
+ MetaFrameFlags flags,
+ int client_width,
+ int client_height,
+ const MetaButtonLayout *button_layout,
+ MetaFrameGeometry *fgeom);
+ 
+MetaFrameLayout* meta_theme_lookup_layout (MetaTheme *theme,
+ const char *name);
+void meta_theme_insert_layout (MetaTheme *theme,
+ const char *name,
+ MetaFrameLayout *layout);
+MetaDrawOpList* meta_theme_lookup_draw_op_list (MetaTheme *theme,
+ const char *name);
+void meta_theme_insert_draw_op_list (MetaTheme *theme,
+ const char *name,
+ MetaDrawOpList *op_list);
+MetaFrameStyle* meta_theme_lookup_style (MetaTheme *theme,
+ const char *name);
+void meta_theme_insert_style (MetaTheme *theme,
+ const char *name,
+ MetaFrameStyle *style);
+MetaFrameStyleSet* meta_theme_lookup_style_set (MetaTheme *theme,
+ const char *name);
+void meta_theme_insert_style_set (MetaTheme *theme,
+ const char *name,
+ MetaFrameStyleSet *style_set);
+gboolean meta_theme_define_int_constant (MetaTheme *theme,
+ const char *name,
+ int value,
+ GError **error);
+gboolean meta_theme_lookup_int_constant (MetaTheme *theme,
+ const char *name,
+ int *value);
+gboolean meta_theme_define_float_constant (MetaTheme *theme,
+ const char *name,
+ double value,
+ GError **error);
+gboolean meta_theme_lookup_float_constant (MetaTheme *theme,
+ const char *name,
+ double *value);
+
+gboolean meta_theme_define_color_constant (MetaTheme *theme,
+ const char *name,
+ const char *value,
+ GError **error);
+gboolean meta_theme_lookup_color_constant (MetaTheme *theme,
+ const char *name,
+ char **value);
+
+gboolean meta_theme_replace_constants (MetaTheme *theme,
+ PosToken *tokens,
+ int n_tokens,
+ GError **err);
+
+/* random stuff */
+
+PangoFontDescription* meta_gtk_widget_get_font_desc (GtkWidget *widget,
+ double scale,
+ const PangoFontDescription *override);
+int meta_pango_font_desc_get_text_height (const PangoFontDescription *font_desc,
+ PangoContext *context);
+
+
+/* Enum converters */
+MetaGtkColorComponent meta_color_component_from_string (const char *str);
+const char* meta_color_component_to_string (MetaGtkColorComponent component);
+MetaButtonState meta_button_state_from_string (const char *str);
+const char* meta_button_state_to_string (MetaButtonState state);
+MetaButtonType meta_button_type_from_string (const char *str,
+ MetaTheme *theme);
+const char* meta_button_type_to_string (MetaButtonType type);
+MetaFramePiece meta_frame_piece_from_string (const char *str);
+const char* meta_frame_piece_to_string (MetaFramePiece piece);
+MetaFrameState meta_frame_state_from_string (const char *str);
+const char* meta_frame_state_to_string (MetaFrameState state);
+MetaFrameResize meta_frame_resize_from_string (const char *str);
+const char* meta_frame_resize_to_string (MetaFrameResize resize);
+MetaFrameFocus meta_frame_focus_from_string (const char *str);
+const char* meta_frame_focus_to_string (MetaFrameFocus focus);
+MetaFrameType meta_frame_type_from_string (const char *str);
+const char* meta_frame_type_to_string (MetaFrameType type);
+MetaGradientType meta_gradient_type_from_string (const char *str);
+const char* meta_gradient_type_to_string (MetaGradientType type);
+GtkStateType meta_gtk_state_from_string (const char *str);
+const char* meta_gtk_state_to_string (GtkStateType state);
+GtkShadowType meta_gtk_shadow_from_string (const char *str);
+const char* meta_gtk_shadow_to_string (GtkShadowType shadow);
+GtkArrowType meta_gtk_arrow_from_string (const char *str);
+const char* meta_gtk_arrow_to_string (GtkArrowType arrow);
+MetaImageFillType meta_image_fill_type_from_string (const char *str);
+const char* meta_image_fill_type_to_string (MetaImageFillType fill_type);
+
+guint meta_theme_earliest_version_with_button (MetaButtonType type);
+
+
+#define META_THEME_ALLOWS(theme, feature) (theme->format_version >= feature)
+
+/* What version of the theme file format were various features introduced in? */
+#define META_THEME_SHADE_STICK_ABOVE_BUTTONS 2
+#define META_THEME_UBIQUITOUS_CONSTANTS 2
+#define META_THEME_VARIED_ROUND_CORNERS 2
+#define META_THEME_IMAGES_FROM_ICON_THEMES 2
+#define META_THEME_UNRESIZABLE_SHADED_STYLES 2
+#define META_THEME_DEGREES_IN_ARCS 2
+#define META_THEME_HIDDEN_BUTTONS 2
+#define META_THEME_COLOR_CONSTANTS 2
+#define META_THEME_FRAME_BACKGROUNDS 2
+
+#endif