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Correct comment. Correct comment. Much commenting; #ifdeffed-out debug

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2008-01-16  Thomas Thurman  <tthurman@gnome.org>

        * src/core/bell.c: Correct comment.
        * src/core/main.c: Correct comment.
        * src/core/theme.c: Much commenting; #ifdeffed-out debug code removed.
        * src/core/theme.h: Much commenting.



svn path=/trunk/; revision=3522
This commit is contained in:
Thomas Thurman 2008-01-17 03:49:24 +00:00 committed by Thomas James Alexander Thurman
parent cb5134de8d
commit ca098b2416
5 changed files with 221 additions and 28 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2008-01-16 Thomas Thurman <tthurman@gnome.org>
* src/core/bell.c: Correct comment.
* src/core/main.c: Correct comment.
* src/core/theme.c: Much commenting; #ifdeffed-out debug code removed.
* src/core/theme.h: Much commenting.
2008-01-13 Thomas Thurman <tthurman@gnome.org>
* src/core/bell.c: Commenting.

4
src/core/bell.c
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@ -174,8 +174,8 @@ meta_bell_flash_fullscreen (MetaDisplay *display,
/**
* Makes a frame be not flashed; this is the timeout half of
* meta_frame_flash(). This is done simply by clearing the flash flag and
* queuing a redraw of the frame.
* meta_bell_flash_window_frame(). This is done simply by clearing the
* flash flag and queuing a redraw of the frame.
*
* If the configure script found we had no XKB, this does not exist.
*

2
src/core/main.c
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@ -558,7 +558,7 @@ meta_restart (void)
* Should they be?
*
* \param pref Which preference has changed
* \param pref Arbitrary data (which we ignore)
* \param data Arbitrary data (which we ignore)
*/
static void
prefs_changed_callback (MetaPreference pref,

156
src/ui/theme.c
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@ -21,6 +21,37 @@
* 02111-1307, USA.
*/
/**
* \file theme.c Making Metacity look pretty
*
* The window decorations drawn by Metacity are described by files on disk
* known internally as "themes" (externally as "window border themes" on
* http://art.gnome.org/themes/metacity/ or "Metacity themes"). This file
* contains most of the code necessary to support themes; it does not
* contain the XML parser, which is in theme-parser.c.
*
* \bug This is a big file with lots of different subsystems, which might
* be better split out into separate files.
*/
/**
* \defgroup tokenizer The theme expression tokenizer
*
* Themes can use a simple expression language to represent the values of
* things. This is the tokeniser used for that language.
*
* \bug We could remove almost all this code by using GScanner instead,
* but we would also have to find every expression in every existing theme
* we could and make sure the parse trees were the same.
*/
/**
* \defgroup parser The theme expression parser
*
* Themes can use a simple expression language to represent the values of
* things. This is the parser used for that language.
*/
#include <config.h>
#include "theme.h"
#include "theme-parser.h"
@ -60,6 +91,9 @@ static void hls_to_rgb (gdouble *h,
gdouble *l,
gdouble *s);
/**
* The current theme. (Themes are singleton.)
*/
static MetaTheme *meta_current_theme = NULL;
static GdkPixbuf *
@ -155,6 +189,11 @@ color_composite (const GdkColor *bg,
color->blue = color->blue + (((fg->blue - color->blue) * alpha + 0x8000) >> 16);
}
/**
* Sets all the fields of a border to dummy values.
*
* \param border The border whose fields should be reset.
*/
static void
init_border (GtkBorder *border)
{
@ -164,6 +203,12 @@ init_border (GtkBorder *border)
border->right = -1;
}
/**
* Creates a new, empty MetaFrameLayout. The fields will be set to dummy
* values.
*
* \return The newly created MetaFrameLayout.
*/
MetaFrameLayout*
meta_frame_layout_new (void)
{
@ -198,6 +243,9 @@ meta_frame_layout_new (void)
return layout;
}
/**
*
*/
static gboolean
validate_border (const GtkBorder *border,
const char **bad)
@ -216,6 +264,19 @@ validate_border (const GtkBorder *border,
return *bad == NULL;
}
/**
* Ensures that the theme supplied a particular dimension. When a
* MetaFrameLayout is created, all its integer fields are set to -1
* by meta_frame_layout_new(). After an instance of this type
* should have been initialised, this function checks that
* a given field is not still at -1. It is never called directly, but
* rather via the CHECK_GEOMETRY_VALUE and CHECK_GEOMETRY_BORDER
* macros.
*
* \param val The value to check
* \param name The name to use in the error message
* \param[out] error Set to an error if val was not initialised
*/
static gboolean
validate_geometry_value (int val,
const char *name,
@ -1348,6 +1409,12 @@ meta_color_spec_render (MetaColorSpec *spec,
}
}
/**
* Represents an operation as a string.
*
* \param type an operation, such as addition
* \return a string, such as "+"
*/
static const char*
op_name (PosOperatorType type)
{
@ -1374,6 +1441,14 @@ op_name (PosOperatorType type)
return "<unknown>";
}
/**
* Parses a string and returns an operation.
*
* \param p a pointer into a string representing an operation; part of an
* expression somewhere, so not null-terminated
* \param len set to the length of the string found. Set to 0 if none is.
* \return the operation found. If none was, returns POS_OP_NONE.
*/
static PosOperatorType
op_from_string (const char *p,
int *len)
@ -1422,6 +1497,13 @@ op_from_string (const char *p,
return POS_OP_NONE;
}
/**
* Frees an array of tokens. All the tokens and their associated memory
* will be freed.
*
* \param tokens an array of tokens to be freed
* \param n_tokens how many tokens are in the array.
*/
static void
free_tokens (PosToken *tokens,
int n_tokens)
@ -1439,6 +1521,22 @@ free_tokens (PosToken *tokens,
g_free (tokens);
}
/**
* Tokenises a number in an expression.
*
* \param p a pointer into a string representing an operation; part of an
* expression somewhere, so not null-terminated
* \param end_return set to a pointer to the end of the number found; but
* not updated if no number was found at all
* \param next set to either an integer or a float token
* \param[out] err set to the problem if there was a problem
* \return TRUE if a valid number was found, FALSE otherwise (and "err" will
* have been set)
*
* \bug The "while (*start)..." part: what's wrong with strchr-ish things?
* \bug The name is wrong: it doesn't parse anything.
* \ingroup tokenizer
*/
static gboolean
parse_number (const char *p,
const char **end_return,
@ -1514,6 +1612,9 @@ parse_number (const char *p,
return TRUE;
}
/**
* Whether a variable can validly appear as part of the name of a variable.
*/
#define IS_VARIABLE_CHAR(c) (g_ascii_isalpha ((c)) || (c) == '_')
#if 0
@ -1556,6 +1657,18 @@ debug_print_tokens (PosToken *tokens,
}
#endif
/**
* Tokenises an expression.
*
* \param expr The expression
* \param[out] token_p The resulting tokens
* \param[out] n_tokens_p The number of resulting tokens
* \param[out] err set to the problem if there was a problem
*
* \return True if the expression was successfully tokenised; false otherwise.
*
* \ingroup tokenizer
*/
static gboolean
pos_tokenize (const char *expr,
PosToken **tokens_p,
@ -1688,6 +1801,10 @@ typedef enum
POS_EXPR_OPERATOR
} PosExprType;
/**
*
* \bug operator is char; it should really be of PosOperatorType.
*/
typedef struct
{
PosExprType type;
@ -1976,14 +2093,37 @@ do_operations (PosExpr *exprs,
return TRUE;
}
/**
* There is a predefined set of variables which can appear in an expression.
* Here we take a token representing a variable, and return the current value
* of that variable in a particular environment.
* (The value is always an integer.)
*
* There are supposedly some circumstances in which this function can be
* called from outside Metacity, in which case env->theme will be NULL, and
* therefore we can't use it to find out quark values, so we do the comparison
* using strcmp, which is slower.
*
* \param t The token representing a variable
* \param[out] result The value of that variable; not set if the token did
* not represent a known variable
* \param env The environment within which t should be evaluated
* \param[out] err set to the problem if there was a problem
*
* \return true if we found the variable asked for, false if we didn't
*
* \bug shouldn't t be const?
* \bug we should perhaps consider some sort of lookup arrangement into an
* array; also, the duplication of code is unlovely; perhaps using glib
* string hashes instead of quarks would fix both problems?
* \ingroup parser
*/
static gboolean
pos_eval_get_variable (PosToken *t,
int *result,
const MetaPositionExprEnv *env,
GError **err)
{
/* In certain circumstances (when the theme parser is used outside
of metacity) env->theme will be NULL so we run the slow variable search */
if (env->theme)
{
if (t->d.v.name_quark == env->theme->quark_width)
@ -2070,6 +2210,12 @@ pos_eval_get_variable (PosToken *t,
return TRUE;
}
/**
* foo
*
* \param tokens
* \bug FIXME write this
*/
static gboolean
pos_eval_helper (PosToken *tokens,
int n_tokens,
@ -2077,7 +2223,7 @@ pos_eval_helper (PosToken *tokens,
PosExpr *result,
GError **err)
{
/* lazy-ass hardcoded limit on expression size */
/* Lazy-ass hardcoded limit on number of terms in expression */
#define MAX_EXPRS 32
int paren_level;
int first_paren;
@ -2086,10 +2232,6 @@ pos_eval_helper (PosToken *tokens,
int n_exprs;
int precedence;
#if 0
g_print ("Pos eval helper on %d tokens:\n", n_tokens);
#endif
/* Our first goal is to get a list of PosExpr, essentially
* substituting variables and handling parentheses.
*/

80
src/ui/theme.h
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@ -56,6 +56,13 @@ typedef enum
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,
@ -63,65 +70,102 @@ typedef enum
META_BUTTON_SIZING_LAST
} MetaButtonSizing;
/* Parameters used to calculate the geometry of the frame */
/**
* Various parameters used to calculate the geometry of a frame.
*
* \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/right/bottom sides */
/** 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 */
/** Border of blue title region
* \bug (blue?!)
**/
GtkBorder title_border;
/* Extra height for inside of title region, above the font height */
/** Extra height for inside of title region, above the font height */
int title_vertical_pad;
/* indent of buttons from edges of frame */
/** Right indent of buttons from edges of frame */
int right_titlebar_edge;
/** Left indent of buttons from edges of frame */
int left_titlebar_edge;
/* Size of buttons */
/**
* 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;
double button_aspect; /* height / width */
/**
* 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 */
/** Space around buttons */
GtkBorder button_border;
/* scale factor for title text */
/** scale factor for title text */
double title_scale;
/* Whether title text will be displayed */
/** Whether title text will be displayed */
guint has_title : 1;
/* Whether we should hide the buttons */
/** Whether we should hide the buttons */
guint hide_buttons : 1;
/* Round corners */
/** 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 size of a button (FIXME: In general? Or on one frame?).
* The reason for two different rectangles here is Fitts' law & maximized
* windows; see bug #97703 for more details.
*
* \bug In general? Or on one frame? FIXME
* \bug Bugs should be hyperlinked: talk to doxygen people
*/
struct _MetaButtonSpace
{
/* The reason for two different rectangles here is Fitts' law & maximized
* windows; see #97703 for more details.
* visible - The screen area where the button's image is drawn
* clickable - The screen area where the button can be activated by clicking
*/
/** 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 */
/**
* Calculated actual geometry of the frame
*/
struct _MetaFrameGeometry
{
int left_width;