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gtk2/gtk/gtkcsswin32sizevalue.c
Benjamin Otte 3322599e99 css: Introduce the idea of dynamic values 
Dynamic values are values that change their contents with the current
(monotonic) time.

This just introduces the GtkCssValue API for it.
2018-03-16 06:04:43 +01:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* This library 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 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcsswin32sizevalueprivate.h"
#include "gtkwin32drawprivate.h"
#include "gtkwin32themeprivate.h"
typedef enum {
GTK_WIN32_SIZE,
GTK_WIN32_PART_WIDTH,
GTK_WIN32_PART_HEIGHT,
GTK_WIN32_PART_BORDER_TOP,
GTK_WIN32_PART_BORDER_RIGHT,
GTK_WIN32_PART_BORDER_BOTTOM,
GTK_WIN32_PART_BORDER_LEFT
} GtkWin32SizeType;
static const char *css_value_names[] = {
"-gtk-win32-size(",
"-gtk-win32-part-width(",
"-gtk-win32-part-height(",
"-gtk-win32-part-border-top(",
"-gtk-win32-part-border-right(",
"-gtk-win32-part-border-bottom(",
"-gtk-win32-part-border-left("
};
struct _GtkCssValue {
GTK_CSS_VALUE_BASE
double scale; /* needed for calc() math */
GtkWin32Theme *theme;
GtkWin32SizeType type;
union {
struct {
gint id;
} size;
struct {
gint part;
gint state;
} part;
} val;
};
static GtkCssValue * gtk_css_win32_size_value_new (double scale,
GtkWin32Theme *theme,
GtkWin32SizeType type);
static void
gtk_css_value_win32_size_free (GtkCssValue *value)
{
gtk_win32_theme_unref (value->theme);
g_slice_free (GtkCssValue, value);
}
static int
gtk_css_value_win32_compute_size (const GtkCssValue *value)
{
GtkBorder border;
int size;
switch (value->type)
{
case GTK_WIN32_SIZE:
size = gtk_win32_theme_get_size (value->theme, value->val.size.id);
break;
case GTK_WIN32_PART_WIDTH:
gtk_win32_theme_get_part_size (value->theme, value->val.part.part, value->val.part.state, &size, NULL);
break;
case GTK_WIN32_PART_HEIGHT:
gtk_win32_theme_get_part_size (value->theme, value->val.part.part, value->val.part.state, NULL, &size);
break;
case GTK_WIN32_PART_BORDER_TOP:
gtk_win32_theme_get_part_border (value->theme, value->val.part.part, value->val.part.state, &border);
size = border.top;
break;
case GTK_WIN32_PART_BORDER_RIGHT:
gtk_win32_theme_get_part_border (value->theme, value->val.part.part, value->val.part.state, &border);
size = border.right;
break;
case GTK_WIN32_PART_BORDER_BOTTOM:
gtk_win32_theme_get_part_border (value->theme, value->val.part.part, value->val.part.state, &border);
size = border.bottom;
break;
case GTK_WIN32_PART_BORDER_LEFT:
gtk_win32_theme_get_part_border (value->theme, value->val.part.part, value->val.part.state, &border);
size = border.left;
break;
default:
g_assert_not_reached ();
return 0;
}
return size;
}
static GtkCssValue *
gtk_css_value_win32_size_compute (GtkCssValue *value,
guint property_id,
GtkStyleProvider *provider,
GtkCssStyle *style,
GtkCssStyle *parent_style)
{
return _gtk_css_number_value_new (value->scale * gtk_css_value_win32_compute_size (value), GTK_CSS_PX);
}
static gboolean
gtk_css_value_win32_size_equal (const GtkCssValue *value1,
const GtkCssValue *value2)
{
if (value1->type != value2->type ||
!gtk_win32_theme_equal (value1->theme, value2->theme) )
return FALSE;
switch (value1->type)
{
case GTK_WIN32_SIZE:
return value1->val.size.id == value2->val.size.id;
case GTK_WIN32_PART_WIDTH:
case GTK_WIN32_PART_HEIGHT:
return value1->val.part.part == value2->val.part.part
&& value1->val.part.state == value2->val.part.state;
case GTK_WIN32_PART_BORDER_TOP:
case GTK_WIN32_PART_BORDER_RIGHT:
case GTK_WIN32_PART_BORDER_BOTTOM:
case GTK_WIN32_PART_BORDER_LEFT:
default:
g_assert_not_reached ();
return FALSE;
}
}
static void
gtk_css_value_win32_size_print (const GtkCssValue *value,
GString *string)
{
if (value->scale != 1.0)
{
g_string_append_printf (string, "%g * ", value->scale);
}
g_string_append (string, css_value_names[value->type]);
gtk_win32_theme_print (value->theme, string);
switch (value->type)
{
case GTK_WIN32_SIZE:
{
const char *name = gtk_win32_get_sys_metric_name_for_id (value->val.size.id);
if (name)
g_string_append (string, name);
else
g_string_append_printf (string, ", %d", value->val.size.id);
}
break;
case GTK_WIN32_PART_WIDTH:
case GTK_WIN32_PART_HEIGHT:
case GTK_WIN32_PART_BORDER_TOP:
case GTK_WIN32_PART_BORDER_RIGHT:
case GTK_WIN32_PART_BORDER_BOTTOM:
case GTK_WIN32_PART_BORDER_LEFT:
g_string_append_printf (string, ", %d, %d", value->val.part.part, value->val.part.state);
break;
default:
g_assert_not_reached ();
break;
}
g_string_append (string, ")");
}
static double
gtk_css_value_win32_size_get (const GtkCssValue *value,
double one_hundred_percent)
{
return value->scale * gtk_css_value_win32_compute_size (value);
}
static GtkCssDimension
gtk_css_value_win32_size_get_dimension (const GtkCssValue *value)
{
return GTK_CSS_DIMENSION_LENGTH;
}
static gboolean
gtk_css_value_win32_size_has_percent (const GtkCssValue *value)
{
return FALSE;
}
static GtkCssValue *
gtk_css_value_win32_size_multiply (const GtkCssValue *value,
double factor)
{
GtkCssValue *result;
result = gtk_css_win32_size_value_new (value->scale * factor, value->theme, value->type);
result->val = value->val;
return result;
}
static GtkCssValue *
gtk_css_value_win32_size_try_add (const GtkCssValue *value1,
const GtkCssValue *value2)
{
GtkCssValue *result;
if (!gtk_css_value_win32_size_equal (value1, value2))
return NULL;
result = gtk_css_win32_size_value_new (value1->scale + value2->scale, value1->theme, value1->type);
result->val = value1->val;
return result;
}
static gint
gtk_css_value_win32_size_get_calc_term_order (const GtkCssValue *value)
{
return 2000 + 100 * value->type;
}
static const GtkCssNumberValueClass GTK_CSS_VALUE_WIN32_SIZE = {
{
gtk_css_value_win32_size_free,
gtk_css_value_win32_size_compute,
gtk_css_value_win32_size_equal,
gtk_css_number_value_transition,
NULL,
NULL,
gtk_css_value_win32_size_print
},
gtk_css_value_win32_size_get,
gtk_css_value_win32_size_get_dimension,
gtk_css_value_win32_size_has_percent,
gtk_css_value_win32_size_multiply,
gtk_css_value_win32_size_try_add,
gtk_css_value_win32_size_get_calc_term_order
};
static GtkCssValue *
gtk_css_win32_size_value_new (double scale,
GtkWin32Theme *theme,
GtkWin32SizeType type)
{
GtkCssValue *result;
result = _gtk_css_value_new (GtkCssValue, &GTK_CSS_VALUE_WIN32_SIZE.value_class);
result->scale = scale;
result->theme = gtk_win32_theme_ref (theme);
result->type = type;
return result;
}
static GtkCssValue *
gtk_css_win32_size_value_parse_size (GtkCssValue *value,
GtkCssParser *parser)
{
char *name;
name = _gtk_css_parser_try_ident (parser, TRUE);
if (name)
{
value->val.size.id = gtk_win32_get_sys_metric_id_for_name (name);
if (value->val.size.id == -1)
{
_gtk_css_parser_error (parser, "'%s' is not a name for a win32 metric.", name);
_gtk_css_value_unref (value);
g_free (name);
return NULL;
}
g_free (name);
}
else if (!_gtk_css_parser_try_int (parser, &value->val.size.id))
{
_gtk_css_value_unref (value);
_gtk_css_parser_error (parser, "Expected an integer ID");
return NULL;
}
return value;
}
static GtkCssValue *
gtk_css_win32_size_value_parse_part_size (GtkCssValue *value,
GtkCssParser *parser)
{
if (!_gtk_css_parser_try_int (parser, &value->val.part.part))
{
_gtk_css_value_unref (value);
_gtk_css_parser_error (parser, "Expected an integer part ID");
return NULL;
}
if (! _gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_value_unref (value);
_gtk_css_parser_error (parser, "Expected ','");
return NULL;
}
if (!_gtk_css_parser_try_int (parser, &value->val.part.state))
{
_gtk_css_value_unref (value);
_gtk_css_parser_error (parser, "Expected an integer state ID");
return NULL;
}
return value;
}
GtkCssValue *
gtk_css_win32_size_value_parse (GtkCssParser *parser,
GtkCssNumberParseFlags flags)
{
GtkWin32Theme *theme;
GtkCssValue *result;
guint type;
for (type = 0; type < G_N_ELEMENTS(css_value_names); type++)
{
if (_gtk_css_parser_try (parser, css_value_names[type], TRUE))
break;
}
if (type >= G_N_ELEMENTS(css_value_names))
{
_gtk_css_parser_error (parser, "Not a win32 size value");
return NULL;
}
theme = gtk_win32_theme_parse (parser);
if (theme == NULL)
return NULL;
result = gtk_css_win32_size_value_new (1.0, theme, type);
gtk_win32_theme_unref (theme);
if (! _gtk_css_parser_try (parser, ",", TRUE))
{
_gtk_css_value_unref (result);
_gtk_css_parser_error (parser, "Expected ','");
return NULL;
}
switch (result->type)
{
case GTK_WIN32_SIZE:
result = gtk_css_win32_size_value_parse_size (result, parser);
break;
case GTK_WIN32_PART_WIDTH:
case GTK_WIN32_PART_HEIGHT:
case GTK_WIN32_PART_BORDER_TOP:
case GTK_WIN32_PART_BORDER_RIGHT:
case GTK_WIN32_PART_BORDER_BOTTOM:
case GTK_WIN32_PART_BORDER_LEFT:
result = gtk_css_win32_size_value_parse_part_size (result, parser);
break;
default:
g_assert_not_reached ();
_gtk_css_value_unref (result);
result = NULL;
break;
}
if (result == NULL)
return NULL;
if (!_gtk_css_parser_try (parser, ")", TRUE))
{
_gtk_css_value_unref (result);
_gtk_css_parser_error (parser, "Expected ')'");
return NULL;
}
return result;
}
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