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css: Add GtkCssNumber

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This commit is contained in:
Benjamin Otte 2012-01-13 23:48:42 +01:00
parent bd8fefb20e
commit 893807bee0
5 changed files with 265 additions and 1 deletions
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117
gtk/gtkcssparser.c
View File

@ -529,6 +529,123 @@ _gtk_css_parser_try_double (GtkCssParser *parser,
return TRUE;
}
gboolean
_gtk_css_parser_has_number (GtkCssParser *parser)
{
/* ahem */
return strchr ("+-0123456789.", parser->data[0]) != NULL;
}
gboolean
_gtk_css_parser_read_number (GtkCssParser *parser,
GtkCssNumber *number,
GtkCssNumberParseFlags flags)
{
static const struct {
const char *name;
GtkCssUnit unit;
GtkCssNumberParseFlags required_flags;
} units[] = {
{ "px", GTK_CSS_PX, GTK_CSS_PARSE_LENGTH },
{ "pt", GTK_CSS_PT, GTK_CSS_PARSE_LENGTH },
{ "em", GTK_CSS_EM, GTK_CSS_PARSE_LENGTH },
{ "ex", GTK_CSS_EX, GTK_CSS_PARSE_LENGTH },
{ "pc", GTK_CSS_PC, GTK_CSS_PARSE_LENGTH },
{ "in", GTK_CSS_IN, GTK_CSS_PARSE_LENGTH },
{ "cm", GTK_CSS_CM, GTK_CSS_PARSE_LENGTH },
{ "mm", GTK_CSS_MM, GTK_CSS_PARSE_LENGTH }
};
char *end, *unit;
g_return_val_if_fail (GTK_IS_CSS_PARSER (parser), FALSE);
g_return_val_if_fail (number != NULL, FALSE);
errno = 0;
number->unit = GTK_CSS_NUMBER;
number->value = g_ascii_strtod (parser->data, &end);
if (errno)
{
_gtk_css_parser_error (parser, "not a number: %s", g_strerror (errno));
return FALSE;
}
if (parser->data == end)
{
_gtk_css_parser_error (parser, "not a number");
return FALSE;
}
parser->data = end;
if (flags & GTK_CSS_POSITIVE_ONLY &&
number->value < 0)
{
_gtk_css_parser_error (parser, "negative values are not allowed.");
return FALSE;
}
unit = _gtk_css_parser_try_ident (parser, FALSE);
if (unit)
{
guint i;
for (i = 0; i < G_N_ELEMENTS (units); i++)
{
if (flags & units[i].required_flags &&
g_ascii_strcasecmp (unit, units[i].name) == 0)
break;
}
if (i >= G_N_ELEMENTS (units))
{
_gtk_css_parser_error (parser, "`%s' is not a valid unit.", unit);
g_free (unit);
return FALSE;
}
number->unit = units[i].unit;
g_free (unit);
}
else
{
if ((flags & GTK_CSS_PARSE_PERCENT) &&
_gtk_css_parser_try (parser, "%", FALSE))
{
number->unit = GTK_CSS_PERCENT;
}
else if (number->value == 0.0)
{
if (flags & GTK_CSS_PARSE_NUMBER)
number->unit = GTK_CSS_NUMBER;
else if (flags & GTK_CSS_PARSE_LENGTH)
number->unit = GTK_CSS_PX;
else
number->unit = GTK_CSS_PERCENT;
}
else if (flags & GTK_CSS_NUMBER_AS_PIXELS)
{
GError *error = g_error_new_literal (GTK_CSS_PROVIDER_ERROR,
GTK_CSS_PROVIDER_ERROR_DEPRECATED,
"Not using units is deprecated. Assuming 'px'.");
_gtk_css_parser_take_error (parser, error);
number->unit = GTK_CSS_PX;
}
else if (flags & GTK_CSS_PARSE_NUMBER)
{
number->unit = GTK_CSS_NUMBER;
}
else
{
_gtk_css_parser_error (parser, "Unit is missing.");
return FALSE;
}
}
_gtk_css_parser_skip_whitespace (parser);
return TRUE;
}
/* XXX: we should introduce GtkCssLenght that deals with
* different kind of units */
gboolean

15
gtk/gtkcssparserprivate.h
View File

@ -20,10 +20,19 @@
#ifndef __GTK_CSS_PARSER_PRIVATE_H__
#define __GTK_CSS_PARSER_PRIVATE_H__
#include "gtk/gtkcsstypesprivate.h"
#include <gtk/gtksymboliccolor.h>
G_BEGIN_DECLS
typedef enum /*< skip >*/ {
GTK_CSS_POSITIVE_ONLY = (1 << 0),
GTK_CSS_PARSE_PERCENT = (1 << 1),
GTK_CSS_PARSE_NUMBER = (1 << 2),
GTK_CSS_NUMBER_AS_PIXELS = (1 << 3),
GTK_CSS_PARSE_LENGTH = (1 << 4)
} GtkCssNumberParseFlags;
typedef struct _GtkCssParser GtkCssParser;
typedef void (* GtkCssParserErrorFunc) (GtkCssParser *parser,
@ -78,7 +87,10 @@ gboolean _gtk_css_parser_try_enum (GtkCssParser *parser
GType enum_type,
int *value);
void _gtk_css_parser_skip_whitespace (GtkCssParser *parser);
gboolean _gtk_css_parser_has_number (GtkCssParser *parser);
gboolean _gtk_css_parser_read_number (GtkCssParser *parser,
GtkCssNumber *number,
GtkCssNumberParseFlags flags);
char * _gtk_css_parser_read_string (GtkCssParser *parser);
char * _gtk_css_parser_read_value (GtkCssParser *parser);
GtkSymbolicColor *_gtk_css_parser_read_symbolic_color
@ -86,6 +98,7 @@ GtkSymbolicColor *_gtk_css_parser_read_symbolic_color
GFile * _gtk_css_parser_read_url (GtkCssParser *parser,
GFile *base);
void _gtk_css_parser_skip_whitespace (GtkCssParser *parser);
void _gtk_css_parser_resync (GtkCssParser *parser,
gboolean sync_at_semicolon,
char terminator);

11
gtk/gtkcssstylefuncs.c
View File

@ -1058,6 +1058,13 @@ border_image_repeat_value_print (const GValue *value,
}
}
static void
css_number_print (const GValue *value,
GString *string)
{
_gtk_css_number_print (g_value_get_boxed (value), string);
}
static gboolean
enum_value_parse (GtkCssParser *parser,
GFile *base,
@ -1233,6 +1240,10 @@ gtk_css_style_funcs_init (void)
shadow_value_parse,
shadow_value_print,
shadow_value_compute);
register_conversion_function (GTK_TYPE_CSS_NUMBER,
NULL,
css_number_print,
NULL);
register_conversion_function (G_TYPE_ENUM,
enum_value_parse,
enum_value_print,

87
gtk/gtkcsstypes.c
View File

@ -20,6 +20,7 @@
#include "config.h"
#include "gtkcsstypesprivate.h"
#include "gtkstylecontextprivate.h"
#define DEFINE_BOXED_TYPE_WITH_COPY_FUNC(TypeName, type_name) \
\
@ -33,3 +34,89 @@ G_DEFINE_BOXED_TYPE (TypeName, type_name, type_name ## _copy, g_free)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssBorderCornerRadius, _gtk_css_border_corner_radius)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssBorderImageRepeat, _gtk_css_border_image_repeat)
DEFINE_BOXED_TYPE_WITH_COPY_FUNC (GtkCssNumber, _gtk_css_number)
void
_gtk_css_number_init (GtkCssNumber *number,
double value,
GtkCssUnit unit)
{
number->value = value;
number->unit = unit;
}
void
_gtk_css_number_compute (GtkCssNumber *dest,
const GtkCssNumber *src,
GtkStyleContext *context)
{
switch (src->unit)
{
default:
g_assert_not_reached();
/* fall through */
case GTK_CSS_PERCENT:
case GTK_CSS_NUMBER:
case GTK_CSS_PX:
dest->value = src->value;
dest->unit = src->unit;
break;
case GTK_CSS_PT:
dest->value = src->value * 96.0 / 72.0;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_PC:
dest->value = src->value * 96.0 / 72.0 * 12.0;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_IN:
dest->value = src->value * 96.0;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_CM:
dest->value = src->value * 96.0 * 0.39370078740157477;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_MM:
dest->value = src->value * 96.0 * 0.039370078740157477;
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_EM:
dest->value = src->value * g_value_get_double (_gtk_style_context_peek_property (context, "font-size"));
dest->unit = GTK_CSS_PX;
break;
case GTK_CSS_EX:
/* for now we pretend ex is half of em */
dest->value = src->value * g_value_get_double (_gtk_style_context_peek_property (context, "font-size"));
dest->unit = GTK_CSS_PX;
break;
}
}
void
_gtk_css_number_print (const GtkCssNumber *number,
GString *string)
{
char buf[G_ASCII_DTOSTR_BUF_SIZE];
g_return_if_fail (number != NULL);
g_return_if_fail (string != NULL);
const char *names[] = {
/* [GTK_CSS_NUMBER] = */ "",
/* [GTK_CSS_PERCENT] = */ "%",
/* [GTK_CSS_PX] = */ "px",
/* [GTK_CSS_PT] = */ "pt",
/* [GTK_CSS_EM] = */ "em",
/* [GTK_CSS_EX] = */ "ex",
/* [GTK_CSS_PC] = */ "pc",
/* [GTK_CSS_IN] = */ "in",
/* [GTK_CSS_CM] = */ "cm",
/* [GTK_CSS_MM] = */ "mm"
};
g_ascii_dtostr (buf, sizeof (buf), number->value);
g_string_append (string, buf);
if (number->value != 0.0)
g_string_append (string, names[number->unit]);
}

36
gtk/gtkcsstypesprivate.h
View File

@ -21,6 +21,7 @@
#define __GTK_CSS_TYPES_PRIVATE_H__
#include <glib-object.h>
#include <gtk/gtkstylecontext.h>
G_BEGIN_DECLS
@ -77,9 +78,31 @@ typedef enum /*< skip >*/ {
GTK_CSS_BOTTOM_LEFT
} GtkCssCorner;
typedef enum /*< skip >*/ {
/* CSS term: <number> */
GTK_CSS_NUMBER,
/* CSS term: <percentage> */
GTK_CSS_PERCENT,
/* CSS term: <length> */
GTK_CSS_PX,
GTK_CSS_PT,
GTK_CSS_EM,
GTK_CSS_EX,
GTK_CSS_PC,
GTK_CSS_IN,
GTK_CSS_CM,
GTK_CSS_MM
} GtkCssUnit;
typedef struct _GtkCssNumber GtkCssNumber;
typedef struct _GtkCssBorderCornerRadius GtkCssBorderCornerRadius;
typedef struct _GtkCssBorderImageRepeat GtkCssBorderImageRepeat;
struct _GtkCssNumber {
gdouble value;
GtkCssUnit unit;
};
struct _GtkCssBorderCornerRadius {
double horizontal;
double vertical;
@ -92,9 +115,22 @@ struct _GtkCssBorderImageRepeat {
#define GTK_TYPE_CSS_BORDER_CORNER_RADIUS _gtk_css_border_corner_radius_get_type ()
#define GTK_TYPE_CSS_BORDER_IMAGE_REPEAT _gtk_css_border_image_repeat_get_type ()
#define GTK_TYPE_CSS_NUMBER _gtk_css_number_get_type ()
GType _gtk_css_border_corner_radius_get_type (void);
GType _gtk_css_border_image_repeat_get_type (void);
GType _gtk_css_number_get_type (void);
#define GTK_CSS_NUMBER_INIT(_value,_unit) { (_value), (_unit) }
void _gtk_css_number_init (GtkCssNumber *number,
double value,
GtkCssUnit unit);
void _gtk_css_number_compute (GtkCssNumber *dest,
const GtkCssNumber *src,
GtkStyleContext *context);
void _gtk_css_number_print (const GtkCssNumber *number,
GString *string);
G_END_DECLS